void OpenGLRenderPrivate::initialize()
{
initializeOpenGLFunctions();
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
for (int i = 0; i < 5; ++i){
const char *fShaderCode = nullptr;
switch (i){
case 0:
case 1:
fShaderCode = fShaderI420;
break;
case 2:
fShaderCode = fShaderNV12;
break;
case 3:
fShaderCode = fShaderNV21;
break;
case 4:
fShaderCode = fShaderBGRP;
break;
}
QOpenGLShaderProgram &p = program[i];
p.addShaderFromSourceCode(QOpenGLShader::Vertex, vShaderCode);
p.addShaderFromSourceCode(QOpenGLShader::Fragment, fShaderCode);
p.bindAttributeLocation("VtxCoord", 0);
p.bindAttributeLocation("TexCoord", 1);
p.bind();
switch (i){
case 0:
p.setUniformValue("SamplerY", 0);
p.setUniformValue("SamplerU", 1);
p.setUniformValue("SamplerV", 2);
break;
case 1:
p.setUniformValue("SamplerY", 0);
p.setUniformValue("SamplerV", 1);
p.setUniformValue("SamplerU", 2);
break;
case 2:
case 3:
p.setUniformValue("SamplerY", 0);
p.setUniformValue("SamplerA", 1);
break;
case 4:
p.setUniformValue("SamplerP", 0);
break;
}
}
tex[0] = 0; tex[1] = 0;
tex[2] = 1; tex[3] = 0;
tex[4] = 0; tex[5] = 1;
tex[6] = 1; tex[7] = 1;
QOpenGLContext *c = QOpenGLContext::currentContext();
timer.setInterval(c->format().swapInterval() / (double)c->screen()->refreshRate());
}
void QSGTextMaskMaterial::init(QFontEngine::GlyphFormat glyphFormat)
{
Q_ASSERT(m_font.isValid());
setFlag(Blending, true);
QOpenGLContext *ctx = const_cast<QOpenGLContext *>(QOpenGLContext::currentContext());
Q_ASSERT(ctx != 0);
// The following piece of code will read/write to the font engine's caches,
// potentially from different threads. However, this is safe because this
// code is only called from QQuickItem::updatePaintNode() which is called
// only when the GUI is blocked, and multiple threads will call it in
// sequence. See also QSGRenderContext::invalidate
QRawFontPrivate *fontD = QRawFontPrivate::get(m_font);
if (QFontEngine *fontEngine = fontD->fontEngine) {
if (glyphFormat == QFontEngine::Format_None) {
glyphFormat = fontEngine->glyphFormat != QFontEngine::Format_None
? fontEngine->glyphFormat
: QFontEngine::Format_A32;
}
qreal devicePixelRatio = ctx->surface()->surfaceClass() == QSurface::Window ?
static_cast<QWindow *>(ctx->surface())->devicePixelRatio() : ctx->screen()->devicePixelRatio();
QTransform glyphCacheTransform = QTransform::fromScale(devicePixelRatio, devicePixelRatio);
if (!fontEngine->supportsTransformation(glyphCacheTransform))
glyphCacheTransform = QTransform();
m_glyphCache = fontEngine->glyphCache(ctx, glyphFormat, glyphCacheTransform);
if (!m_glyphCache || int(m_glyphCache->glyphFormat()) != glyphFormat) {
m_glyphCache = new QOpenGLTextureGlyphCache(glyphFormat, glyphCacheTransform);
fontEngine->setGlyphCache(ctx, m_glyphCache.data());
QSGRenderContext *sg = QSGRenderContext::from(ctx);
Q_ASSERT(sg);
sg->registerFontengineForCleanup(fontEngine);
}
}
}
