openglosd.cpp

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// SPDX-License-Identifier: AGPL-3.0-or-later
 
#include <algorithm>
#include <cinttypes>
#include <cstdio>
#include <cstdlib>
#include <vector>
 
#ifdef GRIDPOINTS
#include <string>
#endif
 
#include <sys/ioctl.h>
 
#include <GLES2/gl2.h>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
 
#include <vdr/osd.h>
 
#include "logger.h"
#include "misc.h"
#include "openglosd.h"
#include "openglshader.h"
#include "softhddevice.h"
#include "videorender.h"
 
// This maybe useful for skin developing and marks the rects of the single draws
#ifdef GRIDPOINTS
#define GRIDPOINTSTEXT      1
#define GRIDRECT            1
#define GRIDTEXT            0
#define GRIDPOINTSIZE       3
#define GRIDPOINTOFFSET     4
#define GRIDPOINTSTXTSIZE   14
#define GRIDPOINTBG         clrTransparent
#define GRIDPOINTCLR        0xFFFF0000
#endif
 
static void ConvertColor(const GLint &colARGB, glm::vec4 &col) {
    col.a = ((colARGB & 0xFF000000) >> 24) / 255.0;
    col.r = ((colARGB & 0x00FF0000) >> 16) / 255.0;
    col.g = ((colARGB & 0x0000FF00) >> 8 ) / 255.0;
    col.b = ((colARGB & 0x000000FF)      ) / 255.0;
}
 
static cOglShader *Shaders[stCount];
 
static cOglVb *VertexBuffers[vbCount];
 
/****************************************************************************************
 * cOglShader
 ***************************************************************************************/
void cOglShader::Use(void)
{
    GL_CHECK(glUseProgram(m_id));
}
 
bool cOglShader::Load(eShaderType type)
{
    const char *vertexCode = NULL;
    const char *fragmentCode = NULL;
 
    m_type = type;
    switch (m_type) {
        case stRect:
            vertexCode = rectVertexShader;
            fragmentCode = rectFragmentShader;
            break;
        case stTexture:
            vertexCode = textureVertexShader;
            fragmentCode = textureFragmentShader;
            break;
        case stTextureSwapBR:
            vertexCode = textureVertexShader;
            fragmentCode = textureFragmentShaderSwapBR;
            break;
        case stText:
            vertexCode = textVertexShader;
            fragmentCode = textFragmentShader;
            break;
        default:
            LOGERROR("openglosd: %s: unknown shader type", __FUNCTION__);
            break;
    }
 
    if (vertexCode == NULL || fragmentCode == NULL) {
        LOGERROR("openglosd: %s: error reading shader", __FUNCTION__);
        return false;
    }
 
    if (!Compile(vertexCode, fragmentCode)) {
        LOGERROR("openglosd: %s: error compiling shader", __FUNCTION__);
        return false;
    }
 
    return true;
}
 
void cOglShader::SetFloat(const GLchar *name, GLfloat value)
{
    GL_CHECK(glUniform1f(glGetUniformLocation(m_id, name), value));
}
 
void cOglShader::SetInteger(const GLchar *name, GLint value)
{
    GL_CHECK(glUniform1i(glGetUniformLocation(m_id, name), value));
}
 
void cOglShader::SetVector2f(const GLchar *name, GLfloat x, GLfloat y)
{
    GL_CHECK(glUniform2f(glGetUniformLocation(m_id, name), x, y));
}
 
void cOglShader::SetVector3f(const GLchar *name, GLfloat x, GLfloat y, GLfloat z)
{
    GL_CHECK(glUniform3f(glGetUniformLocation(m_id, name), x, y, z));
}
 
void cOglShader::SetVector4f(const GLchar *name, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
{
    GL_CHECK(glUniform4f(glGetUniformLocation(m_id, name), x, y, z, w));
}
 
void cOglShader::SetMatrix4(const GLchar *name, const glm::mat4 &matrix)
{
    GL_CHECK(glUniformMatrix4fv(glGetUniformLocation(m_id, name), 1, GL_FALSE, glm::value_ptr(matrix)));
}
 
bool cOglShader::Compile(const char *vertexCode, const char *fragmentCode)
{
    GLuint sVertex, sFragment;
 
    // vertex shader
    GL_CHECK(sVertex = glCreateShader(GL_VERTEX_SHADER));
    GL_CHECK(glShaderSource(sVertex, 1, &vertexCode, NULL));
    GL_CHECK(glCompileShader(sVertex));
    if (!CheckCompileErrors(sVertex))
        return false;
 
    // fragment shader
    GL_CHECK(sFragment = glCreateShader(GL_FRAGMENT_SHADER));
    GL_CHECK(glShaderSource(sFragment, 1, &fragmentCode, NULL));
    GL_CHECK(glCompileShader(sFragment));
    if (!CheckCompileErrors(sFragment))
        return false;
 
    // link program
    GL_CHECK(m_id = glCreateProgram());
    GL_CHECK(glAttachShader(m_id, sVertex));
    GL_CHECK(glAttachShader(m_id, sFragment));
    GL_CHECK(glBindAttribLocation(m_id, 0, "position"));
    GL_CHECK(glBindAttribLocation(m_id, 1, "texCoords"));
    GL_CHECK(glLinkProgram(m_id));
    if (!CheckCompileErrors(m_id, true))
        return false;
 
    // delete the shaders as they're linked into our program now and no longer necessary
    GL_CHECK(glDeleteShader(sVertex));
    GL_CHECK(glDeleteShader(sFragment));
    return true;
}
 
bool cOglShader::CheckCompileErrors(GLuint object, bool program) {
    GLint success;
    GLchar infoLog[1024];
    if (!program) {
        GL_CHECK(glGetShaderiv(object, GL_COMPILE_STATUS, &success));
        if (!success) {
            GL_CHECK(glGetShaderInfoLog(object, 1024, NULL, infoLog));
            LOGERROR("openglosd: %s: Compile-time error: Type: %d - %s", __FUNCTION__, m_type, infoLog);
            return false;
        }
    } else {
        GL_CHECK(glGetProgramiv(object, GL_LINK_STATUS, &success));
        if (!success) {
            GL_CHECK(glGetProgramInfoLog(object, 1024, NULL, infoLog));
            LOGERROR("openglosd: %s: Link-time error: Type: %d - %s", __FUNCTION__, m_type, infoLog);
            return false;
        }
    }
    return true;
}
 
#define KERNING_UNKNOWN  (-10000)
/****************************************************************************************
 * cOglGlyph
 ***************************************************************************************/
cOglGlyph::cOglGlyph(FT_ULong charCode, FT_BitmapGlyph ftGlyph)
    : m_charCode(charCode),
      m_bearingLeft(ftGlyph->left),
      m_bearingTop(ftGlyph->top),
      m_width(ftGlyph->bitmap.width),
      m_height(ftGlyph->bitmap.rows),
      m_pBuffer(ftGlyph->bitmap.buffer),
      m_advanceX(ftGlyph->root.advance.x >> 16)   // value in 1/2^16 pixel
{
}
 
cOglGlyph::~cOglGlyph(void)
{
    if (m_texture)
        GL_CHECK(glDeleteTextures(1, &m_texture));
}
 
int cOglGlyph::GetKerningCache(FT_ULong prevSym)
{
    for (int i = m_pKerningCache.Size(); --i > 0; ) {
        if (m_pKerningCache[i].prevSym == prevSym)
            return m_pKerningCache[i].kerning;
    }
    return KERNING_UNKNOWN;
}
 
void cOglGlyph::SetKerningCache(FT_ULong prevSym, int kerning)
{
    m_pKerningCache.Append(tKerning(prevSym, kerning));
}
 
void cOglGlyph::BindTexture(void)
{
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, m_texture));
}
 
void cOglGlyph::LoadTexture(void)
{
    // Disable byte-alignment restriction
    GL_CHECK(glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
    GL_CHECK(glGenTextures(1, &m_texture));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, m_texture));
 
    GL_CHECK(glTexImage2D(
        GL_TEXTURE_2D,
        0,
        GL_LUMINANCE,
        m_width,
        m_height,
        0,
        GL_LUMINANCE,
        GL_UNSIGNED_BYTE,
        m_pBuffer
    ));
 
    // Set texture options
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
    GL_CHECK(glPixelStorei(GL_UNPACK_ALIGNMENT, 4));
}
 
/****************************************************************************************
 * cOglFontAtlas
 ***************************************************************************************/
cOglFontAtlas::cOglFontAtlas(FT_Face face, int height)
{
    int maxAtlasWidth;
    GL_CHECK(glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxAtlasWidth));
 
    FT_Set_Pixel_Sizes(face, 0, height);
    FT_GlyphSlot g = face->glyph;
 
    int rowW = 0;
    int rowH = 0;
 
    // Find the minimum size for the texture holding all visible ASCII characters
    for (int i = MIN_CHARCODE; i <= MAX_CHARCODE; i++) {
        if (FT_Load_Char(face, i, FT_LOAD_NO_BITMAP)) {
            LOGDEBUG2(L_OPENGL, "openglosd: %s: Loading char %d failed!", __FUNCTION__, i);
            continue;
        }
 
        // do some glyph manipulation
        FT_Glyph ftGlyph;
        FT_Stroker stroker;
        if (FT_Stroker_New(g->library, &stroker)) {
            LOGERROR("openglosd: %s: FT_Stroker_New error!", __FUNCTION__);
            return;
        }
 
        float outlineWidth = 0.25f;
        FT_Stroker_Set(stroker, (int)(outlineWidth * 64),
                       FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0);
 
        if (FT_Get_Glyph(g, &ftGlyph)) {
            LOGERROR("openglosd: %s: FT_Get_Glyph error!", __FUNCTION__);
            return;
        }
 
        if (FT_Glyph_StrokeBorder(&ftGlyph, stroker, 0, 1)) {
            LOGERROR("openglosd: %s: FT_Glyph_StrokeBoder error!", __FUNCTION__);
            return;
        }
 
        FT_Stroker_Done(stroker);
 
        if (FT_Glyph_To_Bitmap(&ftGlyph, FT_RENDER_MODE_NORMAL, 0, 1)) {
            LOGERROR("openglosd: %s: FT_Glyph_To_Bitmap error!", __FUNCTION__);
            return;
        }
 
        FT_BitmapGlyph bGlyph = (FT_BitmapGlyph)ftGlyph;
 
        if (rowW + bGlyph->bitmap.width + 1 >= (unsigned int)maxAtlasWidth) {
            m_width = std::max(m_width, rowW);
            m_height += rowH;
            rowW = 0;
            rowH = 0;
        }
        rowW += bGlyph->bitmap.width + 1;
        rowH = std::max(rowH, (int)bGlyph->bitmap.rows);
 
        FT_Done_Glyph(ftGlyph);
    }
 
    m_width = std::max(m_width, rowW);
    m_height += rowH;
 
    // Create a texture that will be used to hold all ASCII glyphs
    GL_CHECK(glGenTextures(1, &m_texture));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, m_texture));
    LOGDEBUG2(L_OPENGL, "openglosd: %s: Try creating font atlas texture with w %d h %d (max %d)", __FUNCTION__, m_width, m_height, maxAtlasWidth);
 
    GL_CHECK(glTexImage2D(
        GL_TEXTURE_2D,
        0,
        GL_LUMINANCE,
        m_width,
        m_height,
        0,
        GL_LUMINANCE,
        GL_UNSIGNED_BYTE,
        0
    ));
 
    GL_CHECK(glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
 
    int offsetX = 0;
    int offsetY = 0;
 
    rowH = 0;
 
    // Now do the real upload
    for (FT_ULong i = MIN_CHARCODE; i <= MAX_CHARCODE; i++) {
        if (FT_Load_Char(face, i, FT_LOAD_NO_BITMAP)) {
            LOGWARNING("openglosd: %s: Loading char %c failed!", __FUNCTION__, i);
            continue;
        }
 
        // do some glyph manipulation
        FT_Glyph ftGlyph;
        FT_Stroker stroker;
        if (FT_Stroker_New(g->library, &stroker)) {
            LOGERROR("openglosd: %s: FT_Stroker_New error!", __FUNCTION__);
            return;
        }
 
        float outlineWidth = 0.25f;
        FT_Stroker_Set(stroker, (int)(outlineWidth * 64),
                       FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0);
 
        if (FT_Get_Glyph(g, &ftGlyph)) {
            LOGERROR("openglosd: %s: FT_Get_Glyph error!", __FUNCTION__);
            return;
        }
 
        if (FT_Glyph_StrokeBorder(&ftGlyph, stroker, 0, 1)) {
            LOGERROR("openglosd: %s: FT_Glyph_StrokeBoder error!", __FUNCTION__);
            return;
        }
 
        FT_Stroker_Done(stroker);
 
        if (FT_Glyph_To_Bitmap(&ftGlyph, FT_RENDER_MODE_NORMAL, 0, 1)) {
            LOGERROR("openglosd: %s: FT_Glyph_To_Bitmap error!", __FUNCTION__);
            return;
        }
        FT_BitmapGlyph bGlyph = (FT_BitmapGlyph)ftGlyph;
 
        // pushing the glyphs to the texture
        if (offsetX + bGlyph->bitmap.width + 1 >= (unsigned int)maxAtlasWidth) {
            offsetY += rowH;
            rowH = 0;
            offsetX = 0;
        }
 
        GL_CHECK(glTexSubImage2D(
            GL_TEXTURE_2D,
            0,
            offsetX,
            offsetY,
            bGlyph->bitmap.width,
            bGlyph->bitmap.rows,
            GL_LUMINANCE,
            GL_UNSIGNED_BYTE,
            bGlyph->bitmap.buffer
        ));
 
        m_pGlyph[i - MIN_CHARCODE] = new cOglAtlasGlyph(i, bGlyph, offsetX / (float)m_width, offsetY / (float)m_height);
        rowH = std::max(rowH, (int)bGlyph->bitmap.rows);
        offsetX += bGlyph->bitmap.width + 1;
 
        FT_Done_Glyph(ftGlyph);
    }
 
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
    LOGDEBUG2(L_OPENGL, "openglosd: %s: Created a %d x %d (%d kB) FontAtlas for fontsize %d, rowH %d, rowW %d",
        __FUNCTION__, m_width, m_height, m_width * m_height / 1024, height, rowH, rowW);
}
 
cOglFontAtlas::~cOglFontAtlas(void) {
    if (m_texture)
        GL_CHECK(glDeleteTextures(1, &m_texture));
 
    for (FT_ULong i = MIN_CHARCODE; i <= MAX_CHARCODE; i++) {
        if (m_pGlyph[i - MIN_CHARCODE]) {
            delete m_pGlyph[i - MIN_CHARCODE];
            m_pGlyph[i - MIN_CHARCODE] = nullptr;
        }
    }
}
 
cOglAtlasGlyph* cOglFontAtlas::GetGlyph(int sym) const {
    if (sym < MIN_CHARCODE || sym > MAX_CHARCODE)
        return nullptr;
 
    return m_pGlyph[sym - MIN_CHARCODE];
}
 
void cOglFontAtlas::BindTexture(void) {
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, m_texture));
}
 
/****************************************************************************************
 * cOglFont
 ***************************************************************************************/
FT_Library cOglFont::s_ftLib = 0;
cList<cOglFont> *cOglFont::s_pFonts = 0;
bool cOglFont::s_initiated = false;
 
cOglFont::cOglFont(const char *fontName, int charHeight)
    : m_name(fontName),
      m_size(charHeight)
{
    int error = FT_New_Face(s_ftLib, m_name, 0, &m_face);
    if (error)
        LOGERROR("openglosd: %s: failed to open %s!", __FUNCTION__, *m_name);
 
    FT_ULong charcode;
    FT_UInt gindex;
    int count = 0;
    int minIndex = 0;
    int maxIndex = 0;
 
    charcode = FT_Get_First_Char(m_face, &gindex);
    minIndex = gindex;
    maxIndex = gindex;
    while (gindex != 0) {
        count++;
        charcode = FT_Get_Next_Char(m_face, charcode, &gindex);
        minIndex = std::min(minIndex, (int)gindex);
        maxIndex = std::max(maxIndex, (int)gindex);
    }
 
    FT_Set_Char_Size(m_face, 0, m_size * 64, 0, 0);
    m_height = (m_face->size->metrics.ascender - m_face->size->metrics.descender + 63) / 64;
    m_bottom = abs((m_face->size->metrics.descender - 63) / 64);
    m_pAtlas = new cOglFontAtlas(m_face, m_size);
    LOGDEBUG2(L_OPENGL, "openglosd: %s: Created new font: %s (%d) height: %d, bottom: %d - %d chars (%d - %d)", __FUNCTION__, fontName, m_size, m_height, m_bottom, count, minIndex, maxIndex);
}
 
cOglFont::~cOglFont(void)
{
    delete m_pAtlas;
    FT_Done_Face(m_face);
}
 
cOglFont *cOglFont::Get(const char *name, int charHeight)
{
    if (!s_pFonts)
        Init();
 
    cOglFont *font;
    for (font = s_pFonts->First(); font; font = s_pFonts->Next(font))
        if (!strcmp(font->Name(), name) && charHeight == font->Size()) {
            return font;
        }
    font = new cOglFont(name, charHeight);
    s_pFonts->Add(font);
 
    return font;
}
 
void cOglFont::Init(void)
{
    if (FT_Init_FreeType(&s_ftLib)) {
        LOGERROR("openglosd: %s: failed to initialize FreeType library!", __FUNCTION__);
        return;
    }
    s_pFonts = new cList<cOglFont>;
    s_initiated = true;
}
 
void cOglFont::Cleanup(void)
{
    if (!s_initiated)
        return;
    delete s_pFonts;
    s_pFonts = 0;
    if (s_ftLib && FT_Done_FreeType(s_ftLib))
        LOGERROR("openglosd: %s: failed to deinitialize FreeType library!", __FUNCTION__);
 
    s_ftLib = 0;
}
 
cOglGlyph* cOglFont::Glyph(FT_ULong charCode) const
{
    // Non-breaking space:
    if (charCode == 0xA0)
        charCode = 0x20;
 
    // Lookup in cache:
    for (cOglGlyph *g = m_glyphCache.First(); g; g = m_glyphCache.Next(g)) {
        if (g->CharCode() == charCode) {
            return g;
        }
    }
 
    FT_UInt glyphIndex = FT_Get_Char_Index(m_face, charCode);
 
    FT_Int32 loadFlags = FT_LOAD_NO_BITMAP;
    // Load glyph image into the slot (erase previous one):
    int error = FT_Load_Glyph(m_face, glyphIndex, loadFlags);
    if (error) {
        LOGERROR("openglosd: %s: FT_Error (0x%02x) : %s", __FUNCTION__, FT_Errors[error].code, FT_Errors[error].message);
        return NULL;
    }
 
    FT_Glyph ftGlyph;
    FT_Stroker stroker;
    error = FT_Stroker_New(s_ftLib, &stroker);
    if (error) {
        LOGERROR("openglosd: %s: FT_Stroker_New FT_Error (0x%02x) : %s", __FUNCTION__, FT_Errors[error].code, FT_Errors[error].message);
        return NULL;
    }
    float outlineWidth = 0.25f;
    FT_Stroker_Set(stroker, (int)(outlineWidth * 64), FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0);
 
    error = FT_Get_Glyph(m_face->glyph, &ftGlyph);
    if (error) {
        LOGERROR("openglosd: %s: FT_Get_Glyph FT_Error (0x%02x) : %s", __FUNCTION__, FT_Errors[error].code, FT_Errors[error].message);
        return NULL;
    }
 
    error = FT_Glyph_StrokeBorder(&ftGlyph, stroker, 0, 1);
    if (error) {
        LOGERROR("openglosd: %s: FT_Glyph_StrokeBorder FT_Error (0x%02x) : %s", __FUNCTION__, FT_Errors[error].code, FT_Errors[error].message);
        return NULL;
    }
    FT_Stroker_Done(stroker);
 
    error = FT_Glyph_To_Bitmap(&ftGlyph, FT_RENDER_MODE_NORMAL, 0, 1);
    if (error) {
        LOGERROR("openglosd: %s: FT_Glyph_To_Bitmap FT_Error (0x%02x) : %s", __FUNCTION__, FT_Errors[error].code, FT_Errors[error].message);
        return NULL;
    }
 
    cOglGlyph *glyph = new cOglGlyph(charCode, (FT_BitmapGlyph)ftGlyph);
    glyph->LoadTexture();
    m_glyphCache.Add(glyph);
    FT_Done_Glyph(ftGlyph);
 
    return glyph;
}
 
int cOglFont::Kerning(cOglGlyph *glyph, FT_ULong prevSym) const
{
    int kerning = 0;
    if (glyph && prevSym) {
        kerning = glyph->GetKerningCache(prevSym);
        if (kerning == KERNING_UNKNOWN) {
            FT_Vector delta;
            FT_UInt glyphIndex = FT_Get_Char_Index(m_face, glyph->CharCode());
            FT_UInt glyphIndexPrev = FT_Get_Char_Index(m_face, prevSym);
            FT_Get_Kerning(m_face, glyphIndexPrev, glyphIndex, FT_KERNING_DEFAULT, &delta);
            kerning = delta.x / 64;
            glyph->SetKerningCache(prevSym, kerning);
        }
    }
 
    return kerning;
}
 
/****************************************************************************************
 * cOglFb
 ***************************************************************************************/
cOglFb::cOglFb(GLint width, GLint height, GLint viewPortWidth, GLint viewPortHeight)
    : m_width(width),
      m_height(height),
      m_viewPortWidth(viewPortWidth),
      m_viewPortHeight(viewPortHeight)
{
    if (m_width != m_viewPortWidth || m_height != m_viewPortHeight)
        m_scrollable = true;
}
 
cOglFb::~cOglFb(void)
{
    if (m_texture)
        GL_CHECK(glDeleteTextures(1, &m_texture));
    if (m_framebuffer)
        GL_CHECK(glDeleteFramebuffers(1, &m_framebuffer));
}
 
bool cOglFb::Init(void)
{
    GL_CHECK(glGenTextures(1, &m_texture));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, m_texture));
    GL_CHECK(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_width, m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
    GL_CHECK(glGenFramebuffers(1, &m_framebuffer));
    GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer));
 
    GL_CHECK(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture, 0));
 
    GLenum fbstatus;
    GL_CHECK(fbstatus = glCheckFramebufferStatus(GL_FRAMEBUFFER));
    if (fbstatus != GL_FRAMEBUFFER_COMPLETE) {
        LOGERROR("openglosd: %s: Framebuffer is not complete!", __FUNCTION__);
        return false;
    }
 
    m_initiated = true;
    return true;
}
 
void cOglFb::Bind(void)
{
    if (!m_initiated)
        Init();
    GL_CHECK(glViewport(0, 0, m_width, m_height));
    GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer));
}
 
void cOglFb::Unbind(void)
{
    GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
}
 
bool cOglFb::BindTexture(void)
{
    if (!m_initiated)
        return false;
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, m_texture));
    return true;
}
 
/****************************************************************************************
 * cOglOutputFb
 ***************************************************************************************/
bool cOglOutputFb::Init(void)
{
    GL_CHECK(glGenTextures(1, &m_texture));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, m_texture));
    GL_CHECK(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_width, m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
    GL_CHECK(glGenFramebuffers(1, &m_framebuffer));
    GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer));
 
    GL_CHECK(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture, 0));
 
    GLenum fbstatus;
    GL_CHECK(fbstatus = glCheckFramebufferStatus(GL_FRAMEBUFFER));
    if (fbstatus != GL_FRAMEBUFFER_COMPLETE) {
        LOGERROR("openglosd: %s: Framebuffer is not complete!", __FUNCTION__);
        return false;
    }
 
    m_initiated = true;
    return true;
}
 
void cOglOutputFb::Unbind(void)
{
    GL_CHECK(glFinish());
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
    GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0));
}
 
/****************************************************************************************
 * cOglVb
 ***************************************************************************************/
 
bool cOglVb::Init(void)
{
    switch (m_type) {
        case vbTexture:                // Texture VBO definition
            m_sizeVertex1 = 2;
            m_sizeVertex2 = 2;
            m_numVertices = 6;
            m_drawMode = GL_TRIANGLES;
            m_shader = stTexture;
            break;
        case vbTextureSwapBR:          // Texture VBO definition, BR swapped
            m_sizeVertex1 = 2;
            m_sizeVertex2 = 2;
            m_numVertices = 6;
            m_drawMode = GL_TRIANGLES;
            m_shader = stTextureSwapBR;
            break;
        case vbRect:                   // Rectangle VBO definition
            m_sizeVertex1 = 2;
            m_sizeVertex2 = 0;
            m_numVertices = 4;
            m_drawMode = GL_TRIANGLE_FAN;
            m_shader = stRect;
            break;
        case vbEllipse:                // Ellipse VBO definition
            m_sizeVertex1 = 2;
            m_sizeVertex2 = 0;
            m_numVertices = 182;
            m_drawMode = GL_TRIANGLE_FAN;
            m_shader = stRect;
            break;
        case vbSlope:                  // Slope VBO definition
            m_sizeVertex1 = 2;
            m_sizeVertex2 = 0;
            m_numVertices = 102;
            m_drawMode = GL_TRIANGLE_FAN;
            m_shader = stRect;
            break;
        case vbText:                   // Text VBO definition
            m_sizeVertex1 = 2;
            m_sizeVertex2 = 2;
            m_numVertices = 6;
            m_drawMode = GL_TRIANGLES;
            m_shader = stText;
            break;
        default:
            break;
    }
 
    GL_CHECK(glGenBuffers(1, &m_vbo));
    GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, m_vbo));
 
    GL_CHECK(glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * (m_sizeVertex1 + m_sizeVertex2) * m_numVertices, NULL, GL_DYNAMIC_DRAW));
 
    GL_CHECK(glEnableVertexAttribArray(m_positionLoc));
    GL_CHECK(glVertexAttribPointer(m_positionLoc, m_sizeVertex1, GL_FLOAT, GL_FALSE, (m_sizeVertex1 + m_sizeVertex2) * sizeof(GLfloat), (GLvoid*)0));
    if (m_sizeVertex2 > 0) {
        GL_CHECK(glEnableVertexAttribArray(m_texCoordsLoc));
        GL_CHECK(glVertexAttribPointer(m_texCoordsLoc, m_sizeVertex2, GL_FLOAT, GL_FALSE, (m_sizeVertex1 + m_sizeVertex2) * sizeof(GLfloat), (GLvoid*)(m_sizeVertex1 * sizeof(GLfloat))));
    }
 
    GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, 0));
 
    return true;
}
 
void cOglVb::Bind(void)
{
    GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, m_vbo));
    GL_CHECK(glEnableVertexAttribArray(m_positionLoc));
    GL_CHECK(glVertexAttribPointer(m_positionLoc, m_sizeVertex1, GL_FLOAT, GL_FALSE, (m_sizeVertex1 + m_sizeVertex2) * sizeof(GLfloat), (GLvoid*)0));
    if (m_sizeVertex2 > 0) {
        GL_CHECK(glEnableVertexAttribArray(m_texCoordsLoc));
        GL_CHECK(glVertexAttribPointer(m_texCoordsLoc, m_sizeVertex2, GL_FLOAT, GL_FALSE, (m_sizeVertex1 + m_sizeVertex2) * sizeof(GLfloat), (GLvoid*)(m_sizeVertex1 * sizeof(GLfloat))));
    }
}
 
void cOglVb::Unbind(void)
{
    GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, 0));
}
 
void cOglVb::ActivateShader(void)
{
    Shaders[m_shader]->Use();
}
 
void cOglVb::EnableBlending(void)
{
    GL_CHECK(glEnable(GL_BLEND));
    GL_CHECK(glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA));
}
 
void cOglVb::DisableBlending(void)
{
    GL_CHECK(glDisable(GL_BLEND));
}
 
void cOglVb::SetShaderColor(GLint color)
{
    glm::vec4 col;
    ConvertColor(color, col);
    Shaders[m_shader]->SetVector4f("inColor", col.r, col.g, col.b, col.a);
}
 
void cOglVb::SetShaderBorderColor(GLint color)
{
    glm::vec4 col;
    ConvertColor(color, col);
    Shaders[m_shader]->SetVector4f("bColor", col.r, col.g, col.b, col.a);
}
 
void cOglVb::SetShaderTexture(GLint value)
{
    Shaders[m_shader]->SetInteger("screenTexture", value);
}
 
void cOglVb::SetShaderAlpha(GLint alpha)
{
    Shaders[m_shader]->SetVector4f("alpha", 1.0f, 1.0f, 1.0f, (GLfloat)(alpha) / 255.0f);
}
 
void cOglVb::SetShaderProjectionMatrix(GLint width, GLint height)
{
    glm::mat4 projection = glm::ortho(0.0f, (GLfloat)width, (GLfloat)height, 0.0f, -1.0f, 1.0f);
    Shaders[m_shader]->SetMatrix4("projection", projection);
}
 
void cOglVb::SetVertexSubData(GLfloat *vertices, int count)
{
    if (count == 0)
        count = m_numVertices;
    GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, m_vbo));
    GL_CHECK(glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(GLfloat) * (m_sizeVertex1 + m_sizeVertex2) * count, vertices));
    GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, 0));
}
 
void cOglVb::SetVertexData(GLfloat *vertices, int count)
{
    if (count == 0)
        count = m_numVertices;
    GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, m_vbo));
    GL_CHECK(glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * (m_sizeVertex1 + m_sizeVertex2) * count, vertices, GL_DYNAMIC_DRAW));
    GL_CHECK(glBindBuffer(GL_ARRAY_BUFFER, 0));
}
 
void cOglVb::DrawArrays(int count)
{
    if (count == 0)
        count = m_numVertices;
    GL_CHECK(glDrawArrays(m_drawMode, 0, count));
}
 
/****************************************************************************************
 * cOpenGLCmd
 ***************************************************************************************/
 
//------------------ cOglCmdInitOutputFb --------------------
bool cOglCmdInitOutputFb::Execute(void)
{
    bool ok = m_pOutputFramebuffer->Init();
    m_pOutputFramebuffer->Unbind();
    return ok;
}
 
//------------------ cOglCmdInitFb --------------------------
bool cOglCmdInitFb::Execute(void)
{
    bool ok = m_pFramebuffer->Init();
    m_pFramebuffer->Unbind();
    if (m_wait)
        m_wait->Signal();
    return ok;
}
 
//------------------ cOglCmdDeleteFb ------------------------
bool cOglCmdDeleteFb::Execute(void)
{
    GL_CHECK(glFinish());
    if (m_pFramebuffer)
        delete m_pFramebuffer;
    return true;
}
 
//------------------ cOglCmdRenderFbToBufferFb --------------
bool cOglCmdRenderFbToBufferFb::Execute(void)
{
    GLfloat x1 = m_x; // left
    GLfloat y1 = m_y; // top
    GLfloat x2 = m_x + m_pFramebuffer->ViewportWidth();  // right
    GLfloat y2 = m_y + m_pFramebuffer->ViewportHeight(); // bottom
 
    GLfloat texX1 = m_drawPortX / (GLfloat)m_pFramebuffer->Width();
    GLfloat texX2 = texX1 + 1.0f;
    GLfloat texY1 = m_drawPortY / (GLfloat)m_pFramebuffer->Height();
    GLfloat texY2 = texY1 + 1.0f;
 
    if (m_pFramebuffer->Scrollable()) {
        GLfloat pageHeight = (GLfloat)m_pFramebuffer->ViewportHeight() / (GLfloat)m_pFramebuffer->Height();
        texX1 = abs(m_drawPortX) / (GLfloat)m_pFramebuffer->Width();
        texY1 = 1.0f - pageHeight - abs(m_drawPortY) / (GLfloat)m_pFramebuffer->Height();
        texX2 = texX1 + (GLfloat)m_pFramebuffer->ViewportWidth() / (GLfloat)m_pFramebuffer->Width();
        texY2 = texY1 + pageHeight;
    }
 
    GLfloat quadVertices[] = {
        // Pos    // TexCoords
        x1,  y1,  texX1, texY2,          // left top
        x1,  y2,  texX1, texY1,          // left bottom
        x2,  y2,  texX2, texY1,          // right bottom
 
        x1,  y1,  texX1, texY2,          // left top
        x2,  y2,  texX2, texY1,          // right bottom
        x2,  y1,  texX2, texY2           // right top
    };
 
    VertexBuffers[vbTexture]->ActivateShader();
    VertexBuffers[vbTexture]->SetShaderAlpha(m_transparency);
    VertexBuffers[vbTexture]->SetShaderProjectionMatrix(m_pBuffer->Width(), m_pBuffer->Height());
    VertexBuffers[vbTexture]->SetShaderBorderColor(m_bcolor);
 
    m_pBuffer->Bind();
    if (!m_pFramebuffer->BindTexture())
        return false;
    if (!m_alphablending)
        VertexBuffers[vbTexture]->DisableBlending();
    VertexBuffers[vbTexture]->Bind();
    GL_CHECK(glEnable(GL_SCISSOR_TEST));
    GL_CHECK(glScissor(m_dirtyX, m_pBuffer->Height() - m_dirtyTop - m_dirtyHeight, m_dirtyWidth, m_dirtyHeight));
    VertexBuffers[vbTexture]->SetVertexSubData(quadVertices);
    VertexBuffers[vbTexture]->DrawArrays();
    GL_CHECK(glDisable(GL_SCISSOR_TEST));
    VertexBuffers[vbTexture]->Unbind();
 
    if (!m_alphablending)
        VertexBuffers[vbTexture]->EnableBlending();
    m_pBuffer->Unbind();
 
    return true;
}
 
//------------------ cOglCmdCopyBufferToOutputFb ------------
bool cOglCmdCopyBufferToOutputFb::Execute(void)
{
    GLfloat x1 = m_x;
    GLfloat y1 = m_y;
    GLfloat x2 = m_x + (GLfloat)m_pFramebuffer->Width();
    GLfloat y2 = m_y + (GLfloat)m_pFramebuffer->Height();
 
    GLfloat texX1 = 0.0f;
    GLfloat texX2 = 1.0f;
    GLfloat texY1 = 1.0f;
    GLfloat texY2 = 0.0f;
 
    GLfloat quadVertices[] = {
        // Pos    // TexCoords
        x1,  y1,  texX1, texY1,          //left top
        x1,  y2,  texX1, texY2,          //left bottom
        x2,  y2,  texX2, texY2,          //right bottom
 
        x1,  y1,  texX1, texY1,          //left top
        x2,  y2,  texX2, texY2,          //right bottom
        x2,  y1,  texX2, texY1           //right top
    };
 
    VertexBuffers[vbTexture]->ActivateShader();
    VertexBuffers[vbTexture]->SetShaderAlpha(255);
    VertexBuffers[vbTexture]->SetShaderProjectionMatrix(m_pOutputFramebuffer->Width(), m_pOutputFramebuffer->Height());
    VertexBuffers[vbTexture]->SetShaderBorderColor(m_borderColor);
 
    m_pOutputFramebuffer->Bind();
    GL_CHECK(glViewport(0, 0, m_pOutputFramebuffer->Width(), m_pOutputFramebuffer->Height()));
    if (!m_pFramebuffer->BindTexture())
        return false;
 
    VertexBuffers[vbTexture]->Bind();
    VertexBuffers[vbTexture]->SetVertexSubData(quadVertices);
    VertexBuffers[vbTexture]->DrawArrays();
    VertexBuffers[vbTexture]->Unbind();
 
    GL_CHECK(glFinish());
    // eglSwapBuffers and gbm_surface_lock_front_buffer in OsdDrawARGB()
    if (m_active)
        m_pDevice->OsdDrawARGB(0, 0, m_pOutputFramebuffer->Width(), m_pOutputFramebuffer->Height(), 0, 0, 0, 0);
    else
        m_pDevice->OsdClose();
 
    m_pOutputFramebuffer->Unbind();
 
    return true;
}
 
//------------------ cOglCmdRenderFbToFb ------------------------
bool cOglCmdRenderFbToFb::Execute(void) {
    if (!m_pFramebuffer || !m_pSrcFb || m_srcRect.IsEmpty() || m_pFramebuffer == m_pSrcFb)
        return false;
 
    GLfloat x1 = m_dstPoint.X();
    GLfloat y1 = m_dstPoint.Y();
    GLfloat x2 = x1 + m_srcRect.Width();
    GLfloat y2 = y1 + m_srcRect.Height();
 
    GLfloat texX1 = (GLfloat) m_srcRect.X()                                                / (GLfloat)m_pSrcFb->Width();
    GLfloat texX2 = (GLfloat)(m_srcRect.X() + m_srcRect.Width())                           / (GLfloat)m_pSrcFb->Width();
    GLfloat texY1 = (GLfloat)(m_pSrcFb->Height() - m_srcRect.Y() - 1)                      / (GLfloat)m_pSrcFb->Height();
    GLfloat texY2 = (GLfloat)(m_pSrcFb->Height() - m_srcRect.Y() - m_srcRect.Height() - 1) / (GLfloat)m_pSrcFb->Height();
 
    GLfloat quadVertices[] = {
        // Position    Texture
        x1, y1, texX1, texY2,
        x1, y2, texX1, texY1,
        x2, y2, texX2, texY1,
 
        x1, y1, texX1, texY2,
        x2, y2, texX2, texY1,
        x2, y1, texX2, texY2
    };
 
    VertexBuffers[vbTexture]->ActivateShader();
    VertexBuffers[vbTexture]->SetShaderAlpha(m_alpha);
    VertexBuffers[vbTexture]->SetShaderProjectionMatrix(m_pFramebuffer->Width(), m_pFramebuffer->Height());
    VertexBuffers[vbTexture]->SetShaderBorderColor(clrTransparent);
 
    m_pFramebuffer->Bind();
 
    if (!m_pSrcFb->BindTexture()) {
        m_pFramebuffer->Unbind();
        return false;
    }
 
    if (m_alpha == ALPHA_OPAQUE)
        VertexBuffers[vbTexture]->DisableBlending();
 
    VertexBuffers[vbTexture]->Bind();
    VertexBuffers[vbTexture]->SetVertexSubData(quadVertices);
    VertexBuffers[vbTexture]->DrawArrays();
    VertexBuffers[vbTexture]->Unbind();
 
    if (m_alpha == ALPHA_OPAQUE)
        VertexBuffers[vbTexture]->EnableBlending();
 
    m_pFramebuffer->Unbind();
 
    return true;
}
 
//------------------ cOglCmdFill ----------------------------
bool cOglCmdFill::Execute(void)
{
    glm::vec4 col;
    ConvertColor(m_color, col);
    m_pFramebuffer->Bind();
    GL_CHECK(glClearColor(col.r, col.g, col.b, col.a));
    GL_CHECK(glClear(GL_COLOR_BUFFER_BIT));
    m_pFramebuffer->Unbind();
 
    return true;
}
 
//------------------ cOglCmdBufferFill ----------------------
bool cOglCmdBufferFill::Execute(void)
{
    glm::vec4 col;
    ConvertColor(m_color, col);
    GL_CHECK(glClearColor(col.r, col.g, col.b, col.a));
    GL_CHECK(glClear(GL_COLOR_BUFFER_BIT));
 
    return true;
}
 
//------------------ cOglCmdDrawRectangle -------------------
bool cOglCmdDrawRectangle::Execute(void)
{
    if (m_width <= 0 || m_height <= 0)
        return false;
 
    GLfloat x1 = m_x;
    GLfloat y1 = m_y;
    GLfloat x2 = m_x + m_width;
    GLfloat y2 = m_y + m_height;
 
    GLfloat vertices[] = {
        x1, y1,    // left top
        x2, y1,    // right top
        x2, y2,    // right bottom
        x1, y2     // left bottom
    };
 
    VertexBuffers[vbRect]->ActivateShader();
    VertexBuffers[vbRect]->SetShaderColor(m_color);
    VertexBuffers[vbRect]->SetShaderProjectionMatrix(m_pFramebuffer->Width(), m_pFramebuffer->Height());
 
    m_pFramebuffer->Bind();
    VertexBuffers[vbRect]->DisableBlending();
    VertexBuffers[vbRect]->Bind();
    VertexBuffers[vbRect]->SetVertexSubData(vertices);
    VertexBuffers[vbRect]->DrawArrays();
    VertexBuffers[vbRect]->Unbind();
    VertexBuffers[vbRect]->EnableBlending();
    m_pFramebuffer->Unbind();
 
    return true;
}
 
//------------------ cOglCmdDrawEllipse ---------------------
//  quadrants:
// 0       draws the entire ellipse
// 1..4    draws only the first, second, third or fourth quadrant, respectively
// 5..8    draws the right, top, left or bottom half, respectively
// -1..-4  draws the inverted part of the given quadrant
//-----------------------------------------------------------
bool cOglCmdDrawEllipse::Execute(void)
{
    if (m_width <= 0 || m_height <= 0)
        return false;
 
    int numVertices = 0;
    GLfloat *vertices = NULL;
 
    switch (m_quadrants) {
        case 0:
            vertices = CreateVerticesFull(numVertices);
            break;
        case 1:
        case 2:
        case 3:
        case 4:
        case -1:
        case -2:
        case -3:
        case -4:
            vertices = CreateVerticesQuadrant(numVertices);
            break;
        case 5:
        case 6:
        case 7:
        case 8:
            vertices = CreateVerticesHalf(numVertices);
            break;
        default:
            break;
    }
 
    VertexBuffers[vbEllipse]->ActivateShader();
    VertexBuffers[vbEllipse]->SetShaderColor(m_color);
    VertexBuffers[vbEllipse]->SetShaderProjectionMatrix(m_pFramebuffer->Width(), m_pFramebuffer->Height());
 
    // not antialiased
    m_pFramebuffer->Bind();
    VertexBuffers[vbEllipse]->DisableBlending();
    VertexBuffers[vbEllipse]->Bind();
    VertexBuffers[vbEllipse]->SetVertexSubData(vertices, numVertices);
    VertexBuffers[vbEllipse]->DrawArrays(numVertices);
    VertexBuffers[vbEllipse]->Unbind();
    VertexBuffers[vbEllipse]->EnableBlending();
    m_pFramebuffer->Unbind();
 
    delete[] vertices;
    return true;
}
 
GLfloat *cOglCmdDrawEllipse::CreateVerticesFull(int &numVertices)
{
    int size = 364;
    numVertices = size/2;
    GLfloat radiusX = (GLfloat)m_width / 2;
    GLfloat radiusY = (GLfloat)m_height / 2;
    GLfloat *vertices = new GLfloat[size];
    vertices[0] = m_x + radiusX;
    vertices[1] = m_y + radiusY;
    for (int i=0; i <= 180; i++) {
        vertices[2 * i + 2] = m_x + radiusX + (GLfloat)cos(2 * i * M_PI / 180.0f) * radiusX;
        vertices[2 * i + 3] = m_y + radiusY - (GLfloat)sin(2 * i * M_PI / 180.0f) * radiusY;
    }
    return vertices;
}
 
GLfloat *cOglCmdDrawEllipse::CreateVerticesQuadrant(int &numVertices)
{
    int size = 94;
    numVertices = size / 2;
    GLfloat radiusX = (GLfloat)m_width;
    GLfloat radiusY = (GLfloat)m_height;
    GLint transX = 0;
    GLint transY = 0;
    GLint startAngle = 0;
    GLfloat *vertices = new GLfloat[size];
    switch (m_quadrants) {
        case 1:
            vertices[0] = m_x;
            vertices[1] = m_y + m_height;
            transY = radiusY;
            break;
        case 2:
            vertices[0] = m_x + m_width;
            vertices[1] = m_y + m_height;
            transX = radiusX;
            transY = radiusY;
            startAngle = 90;
            break;
        case 3:
            vertices[0] = m_x + m_width;
            vertices[1] = m_y;
            transX = radiusX;
            startAngle = 180;
            break;
        case 4:
            vertices[0] = m_x;
            vertices[1] = m_y;
            startAngle = 270;
            break;
        case -1:
            vertices[0] = m_x + m_width;
            vertices[1] = m_y;
            transY = radiusY;
            break;
        case -2:
            vertices[0] = m_x;
            vertices[1] = m_y;
            transX = radiusX;
            transY = radiusY;
            startAngle = 90;
            break;
        case -3:
            vertices[0] = m_x;
            vertices[1] = m_y + m_height;
            transX = radiusX;
            startAngle = 180;
            break;
        case -4:
            vertices[0] = m_x + m_width;
            vertices[1] = m_y + m_height;
            startAngle = 270;
            break;
        default:
            break;
    }
    for (int i = 0; i <= 45; i++) {
        vertices[2 * i + 2] = m_x + transX + (GLfloat)cos((2 * i + startAngle) * M_PI / 180.0f) * radiusX;
        vertices[2 * i + 3] = m_y + transY - (GLfloat)sin((2 * i + startAngle) * M_PI / 180.0f) * radiusY;
    }
    return vertices;
}
 
GLfloat *cOglCmdDrawEllipse::CreateVerticesHalf(int &numVertices)
{
    int size = 184;
    numVertices = size / 2;
    GLfloat radiusX = 0.0f;
    GLfloat radiusY = 0.0f;
    GLint transX = 0;
    GLint transY = 0;
    GLint startAngle = 0;
    GLfloat *vertices = new GLfloat[size];
    switch (m_quadrants) {
        case 5:
            radiusX = (GLfloat)m_width;
            radiusY = (GLfloat)m_height / 2;
            vertices[0] = m_x;
            vertices[1] = m_y + radiusY;
            startAngle = 270;
            transY = radiusY;
            break;
        case 6:
            radiusX = (GLfloat)m_width / 2;
            radiusY = (GLfloat)m_height;
            vertices[0] = m_x + radiusX;
            vertices[1] = m_y + radiusY;
            startAngle = 0;
            transX = radiusX;
            transY = radiusY;
            break;
        case 7:
            radiusX = (GLfloat)m_width;
            radiusY = (GLfloat)m_height / 2;
            vertices[0] = m_x + radiusX;
            vertices[1] = m_y + radiusY;
            startAngle = 90;
            transX = radiusX;
            transY = radiusY;
            break;
        case 8:
            radiusX = (GLfloat)m_width / 2;
            radiusY = (GLfloat)m_height;
            vertices[0] = m_x + radiusX;
            vertices[1] = m_y;
            startAngle = 180;
            transX = radiusX;
            break;
        default:
            break;
    }
    for (int i=0; i <= 90; i++) {
        vertices[2 * i + 2] = m_x + transX + (GLfloat)cos((2 * i + startAngle) * M_PI / 180.0f) * radiusX;
        vertices[2 * i + 3] = m_y + transY - (GLfloat)sin((2 * i + startAngle) * M_PI / 180.0f) * radiusY;
    }
    return vertices;
}
 
//------------------ cOglCmdDrawSlope -----------------------
// type:
// 0: horizontal, rising,  lower
// 1: horizontal, rising,  upper
// 2: horizontal, falling, lower
// 3: horizontal, falling, upper
// 4: vertical,   rising,  lower
// 5: vertical,   rising,  upper
// 6: vertical,   falling, lower
// 7: vertical,   falling, upper
//-----------------------------------------------------------
bool cOglCmdDrawSlope::Execute(void)
{
    if (m_width <= 0 || m_height <= 0)
        return false;
 
    bool falling  = m_type & 0x02;
    bool vertical = m_type & 0x04;
 
    int steps = 100;
    if (m_width < 100)
        steps = 25;
    int numVertices = steps + 2;
    GLfloat *vertices = new GLfloat[numVertices * 2];
 
    switch (m_type) {
        case 0:
        case 4:
            vertices[0] = (GLfloat)(m_x + m_width);
            vertices[1] = (GLfloat)(m_y + m_height);
            break;
        case 1:
        case 5:
            vertices[0] = (GLfloat)m_x;
            vertices[1] = (GLfloat)m_y;
            break;
        case 2:
        case 6:
            vertices[0] = (GLfloat)m_x;
            vertices[1] = (GLfloat)(m_y + m_height);
            break;
        case 3:
        case 7:
            vertices[0] = (GLfloat)(m_x + m_width);
            vertices[1] = (GLfloat)m_y;
            break;
        default:
            vertices[0] = (GLfloat)(m_x);
            vertices[1] = (GLfloat)(m_y);
            break;
    }
 
    for (int i = 0; i <= steps; i++) {
        GLfloat c = cos(i * M_PI / steps);
        if (falling)
            c = -c;
        if (vertical) {
            vertices[2 * i + 2] = (GLfloat)m_x + (GLfloat)m_width / 2.0f + (GLfloat)m_width * c / 2.0f;
            vertices[2 * i + 3] = (GLfloat)m_y + (GLfloat)i * ((GLfloat)m_height) / steps ;
        } else {
            vertices[2 * i + 2] = (GLfloat)m_x + (GLfloat)i * ((GLfloat)m_width) / steps ;
            vertices[2 * i + 3] = (GLfloat)m_y + (GLfloat)m_height / 2.0f + (GLfloat)m_height * c / 2.0f;
        }
    }
 
    VertexBuffers[vbSlope]->ActivateShader();
    VertexBuffers[vbSlope]->SetShaderColor(m_color);
    VertexBuffers[vbSlope]->SetShaderProjectionMatrix(m_pFramebuffer->Width(), m_pFramebuffer->Height());
 
    // not antialiased
    m_pFramebuffer->Bind();
    VertexBuffers[vbSlope]->DisableBlending();
    VertexBuffers[vbSlope]->Bind();
    VertexBuffers[vbSlope]->SetVertexSubData(vertices, numVertices);
    VertexBuffers[vbSlope]->DrawArrays(numVertices);
    VertexBuffers[vbSlope]->Unbind();
    VertexBuffers[vbSlope]->EnableBlending();
    m_pFramebuffer->Unbind();
 
    delete[] vertices;
    return true;
}
 
//------------------ cOglCmdDrawText ------------------------
bool cOglCmdDrawText::Execute(void)
{
    cOglFont *f = cOglFont::Get(*m_fontName, m_fontSize);
    if (!f)
        return false;
 
    if (!m_length)
        return false;
 
    VertexBuffers[vbText]->ActivateShader();
    VertexBuffers[vbText]->SetShaderColor(m_colorText);
    VertexBuffers[vbText]->SetShaderProjectionMatrix(m_pFramebuffer->Width(), m_pFramebuffer->Height());
 
    m_pFramebuffer->Bind();
    VertexBuffers[vbText]->Bind();
 
    int xGlyph = m_x;
    int fontHeight = f->Height();
    int bottom = f->Bottom();
    FT_ULong sym = 0;
    FT_ULong prevSym = 0;
    int kerning = 0;
 
    // Check, if we only have symbols, which are in our atlas
    int unknown_char = 0;
    for (int i = 0; m_pSymbols[i]; i++) {
        if ((m_pSymbols[i] < MIN_CHARCODE) || (m_pSymbols[i] > MAX_CHARCODE)) {
            if (m_pSymbols[i]) {
                unknown_char = m_pSymbols[i];
                break;
            }
        }
    }
 
    if (!unknown_char) {
        cOglFontAtlas *fa = f->Atlas();
        std::vector<GLfloat> vertices;
        vertices.reserve( 4 * 6 * m_length);
 
        for (int i = 0; m_pSymbols[i]; i++) {
            sym = m_pSymbols[i];
 
            cOglAtlasGlyph *g;
            // Get the glyph from the font atlas for ASCII code MIN_CHARCODE-MAX_CHARCODE
            g = fa->GetGlyph(sym);
 
            if (!g) {
                LOGWARNING("openglosd: %s: could not load glyph %lx", __FUNCTION__, sym);
                continue;
            }
 
            if ( m_limitX && xGlyph + g->AdvanceX() > m_limitX )
                break;
 
            kerning = f->Kerning(g, prevSym);
            prevSym = sym;
 
            GLfloat x2 = xGlyph + kerning + g->BearingLeft();
            GLfloat y2 = m_y + (fontHeight - bottom - g->BearingTop());  //top
            GLfloat w = g->Width();
            GLfloat h = g->Height();
 
            vertices.push_back(x2);
            vertices.push_back(y2);
            vertices.push_back(g->OffsetX());
            vertices.push_back(g->OffsetY());
 
            vertices.push_back(x2 + w);
            vertices.push_back(y2);
            vertices.push_back(g->OffsetX() + g->Width() / (float)fa->Width());
            vertices.push_back(g->OffsetY());
 
            vertices.push_back(x2);
            vertices.push_back(y2 + h);
            vertices.push_back(g->OffsetX());
            vertices.push_back(g->OffsetY() + g->Height() / (float)fa->Height());
 
            vertices.push_back(x2 + w);
            vertices.push_back(y2);
            vertices.push_back(g->OffsetX() + g->Width() / (float)fa->Width());
            vertices.push_back(g->OffsetY());
 
            vertices.push_back(x2);
            vertices.push_back(y2 + h);
            vertices.push_back(g->OffsetX());
            vertices.push_back(g->OffsetY() + g->Height() / (float)fa->Height());
 
            vertices.push_back(x2 + w);
            vertices.push_back(y2 + h);
            vertices.push_back(g->OffsetX() + g->Width() / (float)fa->Width());
            vertices.push_back(g->OffsetY() + g->Height() / (float)fa->Height());
 
            xGlyph += kerning + g->AdvanceX();
 
            if ( xGlyph > m_pFramebuffer->Width() - 1 )
                break;
        }
 
        fa->BindTexture();
        VertexBuffers[vbText]->SetVertexData(vertices.data(), (vertices.size() / 4));
        VertexBuffers[vbText]->DrawArrays(vertices.size() / 4);
    } else {
        LOGDEBUG2(L_OPENGL, "openglosd: %s: char %d is not on the texture atlas, use single draw", __FUNCTION__, unknown_char);
        for (int i = 0; m_pSymbols[i]; i++) {
            sym = m_pSymbols[i];
            cOglGlyph *g = f->Glyph(sym);
            if (!g) {
                LOGWARNING("openglosd: %s: could not load glyph %lx", __FUNCTION__, sym);
                continue;
            }
 
            if ( m_limitX && xGlyph + g->AdvanceX() > m_limitX )
                break;
 
            kerning = f->Kerning(g, prevSym);
            prevSym = sym;
 
            GLfloat x1 = xGlyph + kerning + g->BearingLeft();            // left
            GLfloat y1 = m_y + (fontHeight - bottom - g->BearingTop());  // top
            GLfloat x2 = x1 + g->Width();                                // right
            GLfloat y2 = y1 + g->Height();                               // bottom
 
            GLfloat vertices[] = {
                x1, y2,   0.0, 1.0,     // left bottom
                x1, y1,   0.0, 0.0,     // left top
                x2, y1,   1.0, 0.0,     // right top
 
                x1, y2,   0.0, 1.0,     // left bottom
                x2, y1,   1.0, 0.0,     // right top
                x2, y2,   1.0, 1.0      // right bottom
            };
 
            g->BindTexture();
            VertexBuffers[vbText]->SetVertexData(vertices);
            VertexBuffers[vbText]->DrawArrays();
 
            xGlyph += kerning + g->AdvanceX();
 
            if ( xGlyph > m_pFramebuffer->Width() - 1 )
                break;
        }
    }
 
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
    VertexBuffers[vbText]->Unbind();
    m_pFramebuffer->Unbind();
    return true;
}
 
//------------------ cOglCmdDrawImage -----------------------
bool cOglCmdDrawImage::Execute(void)
{
    if (m_width <= 0 || m_height <= 0)
        return false;
 
    GLuint texture;
    GL_CHECK(glGenTextures(1, &texture));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, texture));
    GL_CHECK(glTexImage2D(
        GL_TEXTURE_2D,
        0,
        GL_RGBA,
        m_width,
        m_height,
        0,
        GL_RGBA,
        GL_UNSIGNED_BYTE,
        m_argb
    ));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
 
    GLfloat x1 = m_x;                       // left
    GLfloat y1 = m_y;                       // top
    GLfloat x2 = m_x + m_width * m_scaleX;  // right
    GLfloat y2 = m_y + m_height * m_scaleY; // bottom
 
    GLfloat quadVertices[] = {
        x1, y2,   0.0, 1.0,     // left bottom
        x1, y1,   0.0, 0.0,     // left top
        x2, y1,   1.0, 0.0,     // right top
 
        x1, y2,   0.0, 1.0,     // left bottom
        x2, y1,   1.0, 0.0,     // right top
        x2, y2,   1.0, 1.0      // right bottom
    };
 
    VertexBuffers[vbTextureSwapBR]->ActivateShader();
    VertexBuffers[vbTextureSwapBR]->SetShaderAlpha(255);
    VertexBuffers[vbTextureSwapBR]->SetShaderProjectionMatrix(m_pFramebuffer->Width(), m_pFramebuffer->Height());
    VertexBuffers[vbTextureSwapBR]->SetShaderBorderColor(m_borderColor);
 
    m_pFramebuffer->Bind();
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, texture));
    if (m_overlay)
        VertexBuffers[vbTextureSwapBR]->DisableBlending();
    VertexBuffers[vbTextureSwapBR]->Bind();
    VertexBuffers[vbTextureSwapBR]->SetVertexSubData(quadVertices);
    VertexBuffers[vbTextureSwapBR]->DrawArrays();
    VertexBuffers[vbTextureSwapBR]->Unbind();
    if (m_overlay)
        VertexBuffers[vbTextureSwapBR]->EnableBlending();
    m_pFramebuffer->Unbind();
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
    GL_CHECK(glDeleteTextures(1, &texture));
 
    return true;
}
 
//------------------ cOglCmdDrawTexture ---------------------
bool cOglCmdDrawTexture::Execute(void)
{
    if (m_pImageRef->width <= 0 || m_pImageRef->height <= 0)
        return false;
 
    GLfloat x1 = m_x;                                  // top
    GLfloat y1 = m_y;                                  // left
    GLfloat x2 = m_x + m_pImageRef->width * m_scaleX;  // right
    GLfloat y2 = m_y + m_pImageRef->height * m_scaleY; // bottom
 
    GLfloat quadVertices[] = {
        // Pos    // TexCoords
        x1,  y1,  0.0f, 0.0f,          // left bottom
        x1,  y2,  0.0f, 1.0f,          // left top
        x2,  y2,  1.0f, 1.0f,          // right top
 
        x1,  y1,  0.0f, 0.0f,          // left bottom
        x2,  y2,  1.0f, 1.0f,          // right top
        x2,  y1,  1.0f, 0.0f           // right bottom
    };
 
    VertexBuffers[vbTextureSwapBR]->ActivateShader();
    VertexBuffers[vbTextureSwapBR]->SetShaderAlpha(255);
    VertexBuffers[vbTextureSwapBR]->SetShaderProjectionMatrix(m_pFramebuffer->Width(), m_pFramebuffer->Height());
    VertexBuffers[vbTextureSwapBR]->SetShaderBorderColor(m_borderColor);
 
    m_pFramebuffer->Bind();
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, m_pImageRef->texture));
    VertexBuffers[vbTextureSwapBR]->Bind();
    VertexBuffers[vbTextureSwapBR]->SetVertexSubData(quadVertices);
    VertexBuffers[vbTextureSwapBR]->DrawArrays();
    VertexBuffers[vbTextureSwapBR]->Unbind();
    m_pFramebuffer->Unbind();
 
    return true;
}
 
//------------------ cOglCmdStoreImage ----------------------
bool cOglCmdStoreImage::Execute(void) {
    GL_CHECK(glGenTextures(1, &m_pImageRef->texture));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, m_pImageRef->texture));
    GL_CHECK(glTexImage2D(
        GL_TEXTURE_2D,
        0,
        GL_RGBA,
        m_pImageRef->width,
        m_pImageRef->height,
        0,
        GL_RGBA,
        GL_UNSIGNED_BYTE,
        m_pData
    ));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
    GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
    GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
    return true;
}
 
//------------------ cOglCmdDropImage -----------------------
bool cOglCmdDropImage::Execute(void) {
    if (m_pImageRef->texture != GL_NONE)
        GL_CHECK(glDeleteTextures(1, &m_pImageRef->texture));
    m_pWait->Signal();
    return true;
}
 
/******************************************************************************
 * cOglThread
 *****************************************************************************/
cOglThread::cOglThread(cCondWait *startWait, int maxCacheSize, cSoftHdDevice *device)
    : cThread("oglThread"),
      m_startWait(startWait),
      m_maxCacheSize(maxCacheSize * 1024 * 1024),
      m_pRender(device->Render())
{
    for (int i = 0; i < OGL_MAX_OSDIMAGES; i++) {
        m_imageCache[i].used = false;
        m_imageCache[i].texture = GL_NONE;
        m_imageCache[i].width = 0;
        m_imageCache[i].height = 0;
    }
 
    Start();
}
 
void cOglThread::CleanupImageCache(void)
{
    for (int i = 0; i < OGL_MAX_OSDIMAGES; i++) {
        if (m_imageCache[i].used) {
            DropImageData(i);
        }
    }
}
 
void cOglThread::RequestStop(void)
{
    CleanupImageCache();
    Cancel(-1);
}
 
void cOglThread::Stop(void)
{
    CleanupImageCache();
    Cancel(2);
    Cleanup();
    m_stalled = false;
}
 
void cOglThread::DoCmd(cOglCmd* cmd)
{
    while (m_stalled)
        cCondWait::SleepMs(10);
 
    bool doSignal = false;
    Lock();
    if (m_commands.size() == 0)
        doSignal = true;
    m_commands.push(cmd);
    Unlock();
 
    if (m_commands.size() > OGL_CMDQUEUE_SIZE) {
        m_stalled = true;
    }
 
    if (doSignal || m_stalled)
        m_wait.Signal();
}
 
int cOglThread::StoreImage(const cImage &image)
{
    if (!m_maxCacheSize) {
        LOGERROR("openglosd: %s: cannot store image, no cache set", __FUNCTION__);
        return 0;
    }
 
    if (image.Width() > m_maxTextureSize || image.Height() > m_maxTextureSize) {
        LOGERROR("openglosd: %s: cannot store image of %dpx x %dpx (maximum size is %dpx x %dpx) - falling back to cOsdProvider::StoreImageData()",
            __FUNCTION__, image.Width(), image.Height(), m_maxTextureSize, m_maxTextureSize);
        return 0;
    }
 
    int imgSize = image.Width() * image.Height();
    int newMemUsed = imgSize * sizeof(tColor) + m_memCached;
    if (newMemUsed > m_maxCacheSize) {
        float cachedMB = m_memCached / 1024.0f / 1024.0f;
        float maxMB = m_maxCacheSize / 1024.0f / 1024.0f;
        LOGERROR("openglosd: %s: Maximum size for GPU cache reached. Used: %.2fMB Max: %.2fMB", __FUNCTION__, cachedMB, maxMB);
        return 0;
    }
 
    int slot = GetFreeSlot();
    if (!slot)
        return 0;
 
    tColor *argb = MALLOC(tColor, imgSize);
    if (!argb) {
        LOGERROR("openglosd: %s: memory allocation of %d kb for OSD image failed", __FUNCTION__, (int)(imgSize  * sizeof(tColor) / 1024));
        ClearSlot(slot);
        slot = 0;
        return 0;
    }
 
    memcpy(argb, image.Data(), sizeof(tColor) * imgSize);
 
    sOglImage *imageRef = GetImageRef(slot);
    imageRef->width = image.Width();
    imageRef->height = image.Height();
    DoCmd(new cOglCmdStoreImage(imageRef, argb));
 
    cTimeMs timer(5000);
    while (imageRef->used && imageRef->texture == 0 && !timer.TimedOut())
        cCondWait::SleepMs(2);
 
    if (imageRef->texture == GL_NONE) {
        LOGERROR("openglosd: %s: failed to store OSD image texture! (%s)", __FUNCTION__, timer.TimedOut() ? "timed out" : "allocation failed");
        DropImageData(slot);
        slot = 0;
    }
 
    m_memCached += imgSize * sizeof(tColor);
 
    return slot;
}
 
int cOglThread::GetFreeSlot(void)
{
    Lock();
    int slot = 0;
    for (int i = 0; i < OGL_MAX_OSDIMAGES && !slot; i++) {
        if (!m_imageCache[i].used) {
            m_imageCache[i].used = true;
            slot = -i - 1;
        }
    }
    Unlock();
    return slot;
}
 
void cOglThread::ClearSlot(int slot)
{
    int i = -slot - 1;
    if (i >= 0 && i < OGL_MAX_OSDIMAGES) {
        Lock();
        m_imageCache[i].used = false;
        m_imageCache[i].texture = GL_NONE;
        m_imageCache[i].width = 0;
        m_imageCache[i].height = 0;
        Unlock();
    }
}
 
sOglImage *cOglThread::GetImageRef(int slot)
{
    int i = -slot - 1;
    if (0 <= i && i < OGL_MAX_OSDIMAGES)
        return &m_imageCache[i];
    return 0;
}
 
void cOglThread::DropImageData(int imageHandle)
{
    sOglImage *imageRef = GetImageRef(imageHandle);
    if (!imageRef)
        return;
    int imgSize = imageRef->width * imageRef->height * sizeof(tColor);
    m_memCached -= imgSize;
    cCondWait dropWait;
    DoCmd(new cOglCmdDropImage(imageRef, &dropWait));
    dropWait.Wait();
    ClearSlot(imageHandle);
}
 
void cOglThread::Action(void)
{
    if (!InitOpenGL()) {
        LOGERROR("openglosd: %s: Could not initiate OpenGL context", __FUNCTION__);
        Cleanup();
        m_startWait->Signal();
        return;
    }
 
    if (!InitShaders()) {
        LOGERROR("openglosd: %s: Could not initiate shaders", __FUNCTION__);
        Cleanup();
        m_startWait->Signal();
        return;
    }
 
    if (!InitVertexBuffers()) {
        LOGERROR("openglosd: %s: Vertex Buffers NOT initialized", __FUNCTION__);
        Cleanup();
        m_startWait->Signal();
        return;
    }
 
    GL_CHECK(glGetIntegerv(GL_MAX_TEXTURE_SIZE, &m_maxTextureSize));
    LOGDEBUG2(L_OPENGL, "openglosd: %s: Maximum Pixmap size: %dx%dpx", __FUNCTION__, m_maxTextureSize, m_maxTextureSize);
 
    //now Thread is ready to do his job
    m_startWait->Signal();
    m_stalled = false;
 
    LOGINFO("OpenGL context initialized");
 
    uint64_t startFlush = 0;
    uint64_t endFlush = 0;
    bool timeReset = false;
 
    while(Running()) {
        if (m_commands.empty()) {
            m_wait.Wait(20);
            continue;
        }
 
        Lock();
        cOglCmd* cmd = m_commands.front();
        m_commands.pop();
        Unlock();
 
        uint64_t start = cTimeMs::Now();
        if (strcmp(cmd->Description(), "InitFramebuffer") == 0 || timeReset) {
            startFlush = cTimeMs::Now();
            timeReset = false;
        }
 
        { // start of locked context
        std::unique_lock<std::mutex> lock(m_mutex, std::defer_lock);
 
        if (cmd->NeedsLockingAgainstStateChange())
            lock.lock();
 
        if (!Running())
            continue;
 
        cmd->Execute();
        } // end of locked context
 
        LOGDEBUG2(L_OPENGL_TIME_ALL, "openglosd: %s: \"%-*s\", %dms, %d commands left, time %" PRIu64 "",
            __FUNCTION__, 15, cmd->Description(), (int)(cTimeMs::Now() - start), (int)(m_commands.size()), cTimeMs::Now());
 
        if (strcmp(cmd->Description(), "Copy buffer to OutputFramebuffer") == 0) {
            endFlush = cTimeMs::Now();
            timeReset = true;
            LOGDEBUG2(L_OPENGL_TIME, "openglosd: %s: OSD Flush %dms, time %" PRIu64 "", __FUNCTION__, (int)(endFlush - startFlush), cTimeMs::Now());
        }
        delete cmd;
        if (m_stalled && m_commands.size() < OGL_CMDQUEUE_SIZE / 2)
            m_stalled = false;
    }
 
    LOGINFO("OpenGL worker thread stopped");
}
 
void cOglThread::eglAcquireContext(void)
{
    EGL_CHECK(eglMakeCurrent(m_pRender->EglDisplay(), m_pRender->EglSurface(), m_pRender->EglSurface(), m_pRender->EglContext()));
}
 
bool cOglThread::InitOpenGL(void)
{
    LOGDEBUG2(L_OPENGL, "openglosd: %s: Init OpenGL context", __FUNCTION__);
 
    // Wait for the EGL context to be created
    while(!m_pRender || !m_pRender->GlInitiated()) {
        LOGDEBUG2(L_OPENGL, "openglosd: %s: wait for EGL context", __FUNCTION__);
        usleep(20000);
    }
 
    eglAcquireContext(); // eglMakeCurrent with new eglSurface
 
    GL_CHECK(LOGDEBUG2(L_OPENGL, "  GL Version: \"%s\"", glGetString(GL_VERSION)));
    GL_CHECK(LOGDEBUG2(L_OPENGL, "  GL Vendor: \"%s\"", glGetString(GL_VENDOR)));
    GL_CHECK(LOGDEBUG2(L_OPENGL, "  GL Extensions: \"%s\"", glGetString(GL_EXTENSIONS)));
    GL_CHECK(LOGDEBUG2(L_OPENGL, "  GL Renderer: \"%s\"", glGetString(GL_RENDERER)));
 
    VertexBuffers[vbText]->EnableBlending();
    GL_CHECK(glDisable(GL_DEPTH_TEST));
    LOGDEBUG2(L_OPENGL, "openglosd: %s: Init OpenGL context done", __FUNCTION__);
 
    return true;
}
 
bool cOglThread::InitShaders(void)
{
    for (int i = 0; i < stCount; i++) {
        cOglShader *shader = new cOglShader();
        if (!shader->Load((eShaderType)i))
            return false;
        Shaders[i] = shader;
    }
    LOGDEBUG2(L_OPENGL, "openglosd: %s: Shaders initialized", __FUNCTION__);
 
    return true;
}
 
void cOglThread::DeleteShaders(void)
{
    for (int i = 0; i < stCount; i++)
        delete Shaders[i];
}
 
bool cOglThread::InitVertexBuffers(void)
{
    for (int i = 0; i < vbCount; i++) {
        cOglVb *vb = new cOglVb(i);
        if (!vb->Init())
            return false;
        VertexBuffers[i] = vb;
    }
    LOGDEBUG2(L_OPENGL, "openglosd: %s: Vertex buffers initialized", __FUNCTION__);
 
    return true;
}
 
void cOglThread::DeleteVertexBuffers(void)
{
    for (int i=0; i < vbCount; i++) {
        delete VertexBuffers[i];
    }
}
 
void cOglThread::Cleanup(void)
{
    LOGDEBUG2(L_OPENGL, "openglosd: %s: Cleaning up OpenGL stuff", __FUNCTION__);
 
    DeleteVertexBuffers();
    delete cOglOsd::OutputFramebuffer;
    cOglOsd::OutputFramebuffer = NULL;
    DeleteShaders();
    cOglFont::Cleanup();
}
 
/******************************************************************************
 * cOglPixmap
 *****************************************************************************/
cOglPixmap::cOglPixmap(std::shared_ptr<cOglThread> oglThread, int layer, const cRect &viewPort, const cRect &drawPort)
    : cPixmap(layer, viewPort, drawPort),
      m_pOglThread(oglThread)
{
    int width = drawPort.IsEmpty() ? viewPort.Width() : drawPort.Width();
    int height = drawPort.IsEmpty() ? viewPort.Height() : drawPort.Height();
 
    if (width > m_pOglThread->MaxTextureSize() || height > m_pOglThread->MaxTextureSize()) {
        LOGWARNING("openglosd: %s: cannot allocate pixmap of %dpx x %dpx, clipped to %dpx x %dpx!", __FUNCTION__,
            width, height, std::min(width, m_pOglThread->MaxTextureSize()), std::min(height, m_pOglThread->MaxTextureSize()));
        width = std::min(width, m_pOglThread->MaxTextureSize());
        height = std::min(height, m_pOglThread->MaxTextureSize());
    }
 
    m_pFramebuffer = new cOglFb(width, height, viewPort.Width(), viewPort.Height());
 
#ifdef GRIDPOINTS
    // Creates a tiny font with height GRIDPOINTSTXTSIZE
    m_pTinyfont = cFont::CreateFont(Setup.FontOsd, GRIDPOINTSTXTSIZE);
#endif
}
 
cOglPixmap::~cOglPixmap(void)
{
    if (!m_pOglThread->Active())
        return;
 
    m_pOglThread->DoCmd(new cOglCmdDeleteFb(m_pFramebuffer));
#ifdef GRIDPOINTS
    delete m_pTinyfont;
#endif
}
 
void cOglPixmap::MarkViewPortDirty(const cRect &rect)
{
    cPixmap::MarkViewPortDirty(rect);
    SetDirty();
}
 
void cOglPixmap::SetClean(void)
{
    cPixmap::SetClean();
    SetDirty(false);
}
 
void cOglPixmap::SetLayer(int layer)
{
    cPixmap::SetLayer(layer);
    SetDirty();
}
 
void cOglPixmap::SetAlpha(int alpha)
{
    alpha = constrain(alpha, ALPHA_TRANSPARENT, ALPHA_OPAQUE);
    if (alpha != cPixmap::Alpha()) {
        cPixmap::SetAlpha(alpha);
        SetDirty();
    }
}
 
void cOglPixmap::SetTile(bool tile)
{
    cPixmap::SetTile(tile);
    SetDirty();
}
 
void cOglPixmap::SetViewPort(const cRect &rect)
{
    cPixmap::SetViewPort(rect);
    SetDirty();
}
 
void cOglPixmap::SetDrawPortPoint(const cPoint &point, bool dirty)
{
    cPixmap::SetDrawPortPoint(point, dirty);
    if (dirty)
        SetDirty();
}
 
void cOglPixmap::Clear(void)
{
    if (!m_pOglThread->Active())
        return;
 
    LOCK_PIXMAPS;
    m_pOglThread->DoCmd(new cOglCmdFill(m_pFramebuffer, clrTransparent));
    SetDirty();
    MarkDrawPortDirty(DrawPort());
}
 
void cOglPixmap::Fill(tColor color)
{
    if (!m_pOglThread->Active())
        return;
 
    LOCK_PIXMAPS;
    m_pOglThread->DoCmd(new cOglCmdFill(m_pFramebuffer, color));
    SetDirty();
    MarkDrawPortDirty(DrawPort());
}
 
void cOglPixmap::DrawImage(const cPoint &point, const cImage &image)
{
    DrawScaledImage(point, image);
}
 
void cOglPixmap::DrawImage(const cPoint &point, int imageHandle)
{
    DrawScaledImage(point, imageHandle);
}
 
void cOglPixmap::DrawScaledImage(const cPoint &point, const cImage &image, double factorX, double factorY, __attribute__ ((unused)) bool antiAlias)
{
    if (!m_pOglThread->Active())
        return;
 
    tColor *argb = MALLOC(tColor, image.Width() * image.Height());
    if (!argb)
        return;
    memcpy(argb, image.Data(), sizeof(tColor) * image.Width() * image.Height());
 
    m_pOglThread->DoCmd(new cOglCmdDrawImage(m_pFramebuffer, argb, image.Width(), image.Height(), point.X(), point.Y(), true, factorX, factorY));
#ifdef GRIDRECT
    DrawGridRect(cRect(point.X(), point.Y(), image.Width() * factorX, image.Height() * factorY), GRIDPOINTOFFSET, GRIDPOINTSIZE, GRIDPOINTCLR, GRIDPOINTBG, m_pTinyfont);
#endif
    SetDirty();
    MarkDrawPortDirty(cRect(point, cSize(image.Width() * factorX, image.Height() * factorY)).Intersected(DrawPort().Size()));
}
 
void cOglPixmap::DrawScaledImage(const cPoint &point, int imageHandle, double factorX, double factorY, __attribute__ ((unused)) bool antiAlias)
{
    if (!m_pOglThread->Active())
        return;
 
    if (imageHandle < 0 && m_pOglThread->GetImageRef(imageHandle)) {
        sOglImage *img = m_pOglThread->GetImageRef(imageHandle);
        m_pOglThread->DoCmd(new cOglCmdDrawTexture(m_pFramebuffer, img, point.X(), point.Y(), factorX, factorY));
#ifdef GRIDRECT
        DrawGridRect(cRect(point.X(), point.Y(), img->width * factorX, img->height * factorY), GRIDPOINTOFFSET, GRIDPOINTSIZE, GRIDPOINTCLR, GRIDPOINTBG, m_pTinyfont);
#endif
        SetDirty();
        MarkDrawPortDirty(cRect(point, cSize(img->width * factorX, img->height * factorY)).Intersected(DrawPort().Size()));
    }
}
 
void cOglPixmap::DrawPixel(const cPoint &point, tColor color)
{
    cRect r(point.X(), point.Y(), 1, 1);
    m_pOglThread->DoCmd(new cOglCmdDrawRectangle(m_pFramebuffer, r.X(), r.Y(), r.Width(), r.Height(), color));
#ifdef GRIDRECT
    DrawGridRect(cRect(r.X(), r.Y(), 0, 0), GRIDPOINTOFFSET, GRIDPOINTSIZE, GRIDPOINTCLR, GRIDPOINTBG, m_pTinyfont);
#endif
    SetDirty();
    MarkDrawPortDirty(r);
}
 
void cOglPixmap::DrawBitmap(const cPoint &point, const cBitmap &bitmap, tColor colorFg, tColor colorBg, bool overlay)
{
    if (!m_pOglThread->Active())
        return;
 
    LOCK_PIXMAPS;
    bool specialColors = colorFg || colorBg;
    tColor *argb = MALLOC(tColor, bitmap.Width() * bitmap.Height());
    if (!argb)
        return;
 
    tColor *p = argb;
    for (int py = 0; py < bitmap.Height(); py++)
        for (int px = 0; px < bitmap.Width(); px++) {
                tIndex index = *bitmap.Data(px, py);
                *p++ = (!index && overlay) ? clrTransparent :
                    (specialColors ? (index == 0 ? colorBg : index == 1 ? colorFg :
                    bitmap.Color(index)) : bitmap.Color(index));
        }
 
    m_pOglThread->DoCmd(new cOglCmdDrawImage(m_pFramebuffer, argb, bitmap.Width(), bitmap.Height(), point.X(), point.Y(), true));
#ifdef GRIDRECT
    DrawGridRect(cRect(point.X(), point.Y(), bitmap.Width(), bitmap.Height()), GRIDPOINTOFFSET, GRIDPOINTSIZE, GRIDPOINTCLR, GRIDPOINTBG, m_pTinyfont);
#endif
 
    SetDirty();
    MarkDrawPortDirty(cRect(cPoint(point.X(), point.Y()), cSize(bitmap.Width(), bitmap.Height())).Intersected(DrawPort().Size()));
}
 
void cOglPixmap::DrawText(const cPoint &point, const char *s, tColor colorFg, tColor colorBg, const cFont *font, int width, int height, int alignment)
{
    DrawTextInternal(point, s, colorFg, colorBg, font, width, height, alignment, false);
}
 
#ifdef GRIDPOINTS
void cOglPixmap::DrawGridText(const cPoint &point, const char *s, tColor colorFg, tColor colorBg, const cFont *font, int width, int height, int alignment)
{
    DrawTextInternal(point, s, colorFg, colorBg, font, width, height, alignment, true);
}
#endif
 
void cOglPixmap::DrawTextInternal(const cPoint &point, const char *s, tColor colorFg, tColor colorBg, const cFont *font, int width, int height, int alignment, bool isGridText)
{
    if (!m_pOglThread->Active())
        return;
 
    LOCK_PIXMAPS;
    int len = s ? Utf8StrLen(s) : 0;
    unsigned int *symbols = MALLOC(unsigned int, len + 1);
    if (!symbols)
        return;
 
    if (len)
        Utf8ToArray(s, symbols, len + 1);
    else
        symbols[0] = 0;
 
    int x = point.X();
    int y = point.Y();
    int w = font->Width(s);
    int h = font->Height();
    int limitX = 0;
    int cw = width ? width : w;
    int ch = height ? height : h;
 
    // workaround for messages in SkinElchiHD
    if (width > ViewPort().Width() && !x && !isGridText)
        x = ViewPort().Width() - w;
 
    cRect r(x, y, cw, ch);
 
    if (colorBg != clrTransparent)
        m_pOglThread->DoCmd(new cOglCmdDrawRectangle(m_pFramebuffer, r.X(), r.Y(), r.Width(), r.Height(), colorBg));
 
    if (width || height)
        limitX = x + cw;
 
    if (width) {
        if ((alignment & taLeft) != 0) {
            if ((alignment & taBorder) != 0)
                x += std::max(h / TEXT_ALIGN_BORDER, 1);
        } else if ((alignment & taRight) != 0) {
            if (w < width)
                x += width - w;
            if ((alignment & taBorder) != 0)
                x -= std::max(h / TEXT_ALIGN_BORDER, 1);
        } else { // taCentered
            if (w < width)
                x += (width - w) / 2;
        }
    }
 
    if (height) {
        if ((alignment & taTop) != 0)
            ;
        else if ((alignment & taBottom) != 0) {
            if (h < height)
                y += height - h;
        } else { // taCentered
            if (h < height)
                y += (height - h) / 2;
        }
    }
 
    m_pOglThread->DoCmd(new cOglCmdDrawText(m_pFramebuffer, x, y, symbols, limitX, font->FontName(), font->Size(), colorFg, len));
 
#ifdef GRIDTEXT
    if (!isGridText)
        DrawGridRect(cRect(x, y, cw, ch), GRIDPOINTOFFSET, GRIDPOINTSIZE, GRIDPOINTCLR, GRIDPOINTBG, m_pTinyfont);
#endif
 
    SetDirty();
    MarkDrawPortDirty(r);
}
 
void cOglPixmap::DrawRectangle(const cRect &rect, tColor color)
{
    if (!m_pOglThread->Active())
        return;
 
    LOCK_PIXMAPS;
    m_pOglThread->DoCmd(new cOglCmdDrawRectangle(m_pFramebuffer, rect.X(), rect.Y(), rect.Width(), rect.Height(), color));
#ifdef GRIDRECT
    DrawGridRect(rect, GRIDPOINTOFFSET, GRIDPOINTSIZE, GRIDPOINTCLR, GRIDPOINTBG, m_pTinyfont);
#endif
 
    SetDirty();
    MarkDrawPortDirty(rect);
}
 
void cOglPixmap::DrawEllipse(const cRect &rect, tColor color, int quadrants)
{
    if (!m_pOglThread->Active())
        return;
 
    LOCK_PIXMAPS;
    m_pOglThread->DoCmd(new cOglCmdDrawEllipse(m_pFramebuffer, rect.X(), rect.Y(), rect.Width(), rect.Height(), color, quadrants));
#ifdef GRIDRECT
    DrawGridRect(rect, GRIDPOINTOFFSET, GRIDPOINTSIZE, GRIDPOINTCLR, GRIDPOINTBG, m_pTinyfont);
#endif
 
    SetDirty();
    MarkDrawPortDirty(rect);
}
 
void cOglPixmap::DrawSlope(const cRect &rect, tColor color, int type)
{
    if (!m_pOglThread->Active())
        return;
 
    LOCK_PIXMAPS;
    m_pOglThread->DoCmd(new cOglCmdDrawSlope(m_pFramebuffer, rect.X(), rect.Y(), rect.Width(), rect.Height(), color, type));
#ifdef GRIDRECT
    DrawGridRect(rect, GRIDPOINTOFFSET, GRIDPOINTSIZE, GRIDPOINTCLR, GRIDPOINTBG, m_pTinyfont);
#endif
 
    SetDirty();
    MarkDrawPortDirty(rect);
}
 
void cOglPixmap::Render(const cPixmap *pixmap, const cRect &source, const cPoint &dest)
{
    RenderPixmapInternal(pixmap, source, dest, true);
}
 
void cOglPixmap::Copy(const cPixmap *pixmap, const cRect &source, const cPoint &dest)
{
    // render without respect to alpha values
    RenderPixmapInternal(pixmap, source, dest, false);
}
 
void cOglPixmap::RenderPixmapInternal(const cPixmap *pixmap, const cRect &source, const cPoint &dest, bool useAlpha)
{
    LOGDEBUG2(L_OPENGL, "openglosd: %s: %s", __FUNCTION__, useAlpha ? "Render()" : "Copy()");
 
    if (!m_pOglThread->Active() || !pixmap || source.IsEmpty())
        return;
 
    LOCK_PIXMAPS;
 
    const cOglPixmap *sourceOgl = dynamic_cast<const cOglPixmap *>(pixmap);
 
    // Self-rendering is not allowed according to VDR API
    if (sourceOgl && sourceOgl != this) {
        cRect sourceRect = source.Intersected(cRect(0, 0, sourceOgl->DrawPort().Width(), sourceOgl->DrawPort().Height()));
        sourceRect.SetX(sourceRect.X() + sourceOgl->DrawPort().X());
        sourceRect.SetY(sourceRect.Y() + sourceOgl->DrawPort().Y());
 
        cRect destRect(dest, sourceRect.Size());
        cRect clippedDest = destRect.Intersected(cRect(0, 0, m_pFramebuffer->Width(), m_pFramebuffer->Height()));
        if (clippedDest.IsEmpty())
            return;
 
        sourceRect.SetX(sourceRect.X() + clippedDest.X() - destRect.X());
        sourceRect.SetY(sourceRect.Y() + clippedDest.Y() - destRect.Y());
        sourceRect.SetWidth(clippedDest.Width());
        sourceRect.SetHeight(clippedDest.Height());
        if (sourceRect.IsEmpty())
            return;
 
        m_pOglThread->DoCmd(new cOglCmdRenderFbToFb(m_pFramebuffer,
                                                    sourceOgl->Framebuffer(),
                                                    sourceRect,
                                                    clippedDest.Point(),
                                                    useAlpha ? sourceOgl->Alpha() : ALPHA_OPAQUE));
 
        SetDirty();
        MarkDrawPortDirty(cRect(clippedDest.X(), clippedDest.Y(), sourceRect.Width(), sourceRect.Height()));
 
        return;
    }
 
    if (!sourceOgl)
        LOGWARNING("openglosd: %s: %s is not implemented in OpenGl OSD for your VDR version", __FUNCTION__, useAlpha ? "Render()" : "Copy()");
}
 
void cOglPixmap::Scroll(const cPoint &dest, const cRect &source)
{
    LOGWARNING("openglosd: %s: %d %d not implemented in OpenGl OSD", __FUNCTION__, source.X(), dest.X());
}
 
void cOglPixmap::Pan(const cPoint &dest, const cRect &source)
{
    LOGWARNING("openglosd: %s: %d %d not implemented in OpenGl OSD", __FUNCTION__, source.X(), dest.X());
}
 
#ifdef GRIDPOINTS
void cOglPixmap::DrawGridRect(const cRect &rect, int offset, int size, tColor clr, tColor bg, const cFont *font)
{
    int x1 = rect.X() + offset;
    int x2 = rect.X() + rect.Width() + offset;
    int y1 = rect.Y();
    int y2 = rect.Y() + rect.Height();
    char p1[10];
    char p2[10];
    char p3[10];
    char p4[10];
    sprintf(p1, "%d.%d", x1, y1);
    sprintf(p2, "%d.%d", x2, y1);
    sprintf(p3, "%d.%d", x1, y2);
    sprintf(p4, "%d.%d", x2, y2);
 
    m_pOglThread->DoCmd(new cOglCmdDrawRectangle(m_pFramebuffer, x1, y1, size, size, clr));
#ifdef GRIDPOINTSTEXT
    DrawGridText(cPoint(x1, y1), p1, clr, bg, font);
#endif
    if (Rect.Width() && Rect.Height()) {
        m_pOglThread->DoCmd(new cOglCmdDrawRectangle(m_pFramebuffer, x2, y1, size, size, clr));
        m_pOglThread->DoCmd(new cOglCmdDrawRectangle(m_pFramebuffer, x1, y2, size, size, clr));
        m_pOglThread->DoCmd(new cOglCmdDrawRectangle(m_pFramebuffer, x2, y2, size, size, clr));
#ifdef GRIDPOINTSTEXT
        DrawGridText(cPoint(x2, y1), p2, clr, bg, font);
        DrawGridText(cPoint(x1, y2), p3, clr, bg, font);
        DrawGridText(cPoint(x2, y2), p4, clr, bg, font);
#endif
    }
}
#endif
 
/******************************************************************************
 * cOglOsd
 *****************************************************************************/
cOglOutputFb *cOglOsd::OutputFramebuffer = NULL;
 
cOglOsd::cOglOsd(int left, int top, uint level, std::shared_ptr<cOglThread> oglThread, cSoftHdDevice *device)
    : cOsd(left, top, level),
      m_pOglThread(oglThread),
      m_isSubtitleOsd(level == 10 ? true : false),
      m_pDevice(device)
{
    int osdWidth = 0;
    int osdHeight = 0;
    double pixelAspect;
    m_pDevice->GetOsdSize(osdWidth, osdHeight, pixelAspect);
    LOGDEBUG2(L_OSD, "openglosd: %s: New Osd %p osdLeft %d osdTop %d screenWidth %d screenHeight %d", __FUNCTION__, this, left, top, osdWidth, osdHeight);
 
    m_maxPixmapSize.Set(m_pOglThread->MaxTextureSize(), m_pOglThread->MaxTextureSize());
 
    if (!OutputFramebuffer) {
        OutputFramebuffer = new cOglOutputFb(osdWidth, osdHeight);
        m_pOglThread->DoCmd(new cOglCmdInitOutputFb(OutputFramebuffer));
    }
}
 
cOglOsd::~cOglOsd()
{
    if (!m_pOglThread->Active() || !Active() || !m_pBufferFramebuffer)
        return;
 
    LOGDEBUG2(L_OSD, "openglosd: %s: Delete Osd %p", __FUNCTION__, this);
    m_pOglThread->DoCmd(new cOglCmdFill(m_pBufferFramebuffer, clrTransparent));
 
    SetActive(false); // OsdClose() is done in cOglCmdCopyBufferToOutputFb()
    m_pOglThread->DoCmd(new cOglCmdCopyBufferToOutputFb(m_pBufferFramebuffer, OutputFramebuffer, Left(), Top(), 0, m_pDevice));
    m_pOglThread->DoCmd(new cOglCmdDeleteFb(m_pBufferFramebuffer));
}
 
eOsdError cOglOsd::SetAreas(const tArea *areas, int numAreas)
{
    cRect r;
    if (numAreas > 1)
        m_isSubtitleOsd = true;
    for (int i = 0; i < numAreas; i++)
        r.Combine(cRect(areas[i].x1, areas[i].y1, areas[i].Width(), areas[i].Height()));
 
    tArea area = { r.Left(), r.Top(), r.Right(), r.Bottom(), 32 };
 
    // now we know the actual osd size, create double buffer frame buffer
    if (m_pBufferFramebuffer) {
        m_pOglThread->DoCmd(new cOglCmdDeleteFb(m_pBufferFramebuffer));
        DestroyPixmap(m_pOglPixmaps[0]);
    }
    m_pBufferFramebuffer = new cOglFb(r.Width(), r.Height(), r.Width(), r.Height());
    cCondWait initiated;
    m_pOglThread->DoCmd(new cOglCmdInitFb(m_pBufferFramebuffer, &initiated));
    initiated.Wait();
 
    return cOsd::SetAreas(&area, 1);
}
 
cPixmap *cOglOsd::CreatePixmap(int layer, const cRect &viewPort, const cRect &drawPort)
{
    if (!m_pOglThread->Active())
        return NULL;
 
    LOCK_PIXMAPS;
    cOglPixmap *p = new cOglPixmap(m_pOglThread, layer, viewPort, drawPort);
    if (cOsd::AddPixmap(p)) {
        // find a free slot
        for (int i = 0; i < m_pOglPixmaps.Size(); i++) {
            if (!m_pOglPixmaps[i])
                return m_pOglPixmaps[i] = p;
        }
        m_pOglPixmaps.Append(p);
        return p;
    }
    delete p;
 
    return NULL;
}
 
void cOglOsd::DestroyPixmap(cPixmap *Pixmap)
{
    if (!m_pOglThread->Active())
        return;
    if (!Pixmap)
        return;
 
    LOCK_PIXMAPS;
    int start = 1;
    if (m_isSubtitleOsd)
        start = 0;
    for (int i = start; i < m_pOglPixmaps.Size(); i++) {
        if (m_pOglPixmaps[i] == Pixmap) {
            if (Pixmap->Layer() >= 0)
                m_pOglPixmaps[0]->MarkViewPortDirty(m_pOglPixmaps[i]->ViewPort());
 
            m_pOglPixmaps[i] = NULL;
            if (i)
                cOsd::DestroyPixmap(Pixmap);
 
            return;
        }
    }
}
 
void cOglOsd::Flush(void)
{
    if (!m_pOglThread->Active() || !Active())
        return;
 
    LOGDEBUG2(L_OSD, "openglosd: %s: Flush Osd %p", __FUNCTION__, this);
    LOCK_PIXMAPS;
    // check for dirty areas
    m_pDirtyViewport.Set(0, 0, 0, 0);
    for (int i = 0; i < m_pOglPixmaps.Size(); i++) {
        if (m_pOglPixmaps[i] && m_pOglPixmaps[i]->IsDirty()) {
            if (m_isSubtitleOsd)
                m_pDirtyViewport.Combine(m_pOglPixmaps[i]->DirtyViewPort().Size());
            else
                m_pDirtyViewport.Combine(m_pOglPixmaps[i]->DirtyViewPort());
 
            m_pOglPixmaps[i]->SetClean();
        }
    }
 
    if (m_pDirtyViewport.IsEmpty())
        return;
 
    // clear private buffer within the dirty area
    m_pOglThread->DoCmd(new cOglCmdDrawRectangle(m_pBufferFramebuffer,
                                                 m_pDirtyViewport.X(),
                                                 m_pDirtyViewport.Y(),
                                                 m_pDirtyViewport.Width(),
                                                 m_pDirtyViewport.Height(),
                                                 clrTransparent));
 
    // render pixmap textures blended to private buffer
    for (int layer = 0; layer < MAXPIXMAPLAYERS; layer++) {
        for (int i = 0; i < m_pOglPixmaps.Size(); i++) {
            if (!m_pOglPixmaps[i])
                continue;
 
            if (m_pOglPixmaps[i]->Layer () != layer)
                continue;
 
            if (m_isSubtitleOsd && !m_pDirtyViewport.Intersects(m_pOglPixmaps[i]->ViewPort().Size()))
                continue;
 
            if (!m_isSubtitleOsd && !m_pDirtyViewport.Intersects(m_pOglPixmaps[i]->ViewPort()))
                continue;
 
            bool alphablending = layer == 0 ? false : true; // decide wether to render (with alpha) or copy a pixmap
            m_pOglThread->DoCmd(new cOglCmdRenderFbToBufferFb(m_pOglPixmaps[i]->Framebuffer(),
                                                              m_pBufferFramebuffer,
                                                              m_isSubtitleOsd ? 0 : m_pOglPixmaps[i]->ViewPort().X(),
                                                              m_isSubtitleOsd ? 0 : m_pOglPixmaps[i]->ViewPort().Y(),
                                                              m_pOglPixmaps[i]->Alpha(),
                                                              m_pOglPixmaps[i]->DrawPort().X(),
                                                              m_pOglPixmaps[i]->DrawPort().Y(),
                                                              m_pDirtyViewport.X(),
                                                              m_pDirtyViewport.Top(),
                                                              m_pDirtyViewport.Width(),
                                                              m_pDirtyViewport.Height(),
                                                              alphablending));
        }
    }
    // copy the private buffer to output framebuffer
    m_pOglThread->DoCmd(new cOglCmdBufferFill(OutputFramebuffer, clrTransparent));
 
    m_pOglThread->DoCmd(new cOglCmdCopyBufferToOutputFb(m_pBufferFramebuffer, OutputFramebuffer,
                                                        Left() + (m_isSubtitleOsd ? m_pOglPixmaps[0]->ViewPort().X() : 0),
                                                        Top() + (m_isSubtitleOsd ? m_pOglPixmaps[0]->ViewPort().Y() : 0), 1, m_pDevice));
}
 
void cOglOsd::DrawScaledBitmap(int x, int y, const cBitmap &Bitmap, double FactorX, double FactorY, bool AntiAlias)
{
    if (!m_pOglPixmaps[0])
        return;
 
    std::unique_ptr<cBitmap> scaledBitmap;
    const cBitmap *b = &Bitmap;
 
    if (!DoubleEqual(FactorX, 1.0) || !DoubleEqual(FactorY, 1.0)) {
        scaledBitmap.reset(Bitmap.Scaled(FactorX, FactorY, AntiAlias));
        b = scaledBitmap.get();
    }
 
    int xNew = x;
    int yNew = y;
 
    const cRect &viewport = m_pOglPixmaps[0]->ViewPort();
    if (m_isSubtitleOsd && (x >= viewport.X()))
        xNew -= viewport.X();
    if (m_isSubtitleOsd && (y >= viewport.Y()))
        yNew -= viewport.Y();
 
    m_pOglPixmaps[0]->DrawBitmap(cPoint(xNew, yNew), *b);
}