void OgrePlatform::deserializeShaders (const std::string& file)
{
std::ifstream inp;
inp.open(file.c_str(), std::ios::in | std::ios::binary);
Ogre::DataStreamPtr shaderCache(OGRE_NEW Ogre::FileStreamDataStream(file, &inp, false));
Ogre::GpuProgramManager::getSingleton().loadMicrocodeCache(shaderCache);
}
// The address returned here will only be valid until next time this function is called.
// The program is return bound.
QGLEngineShaderProg *QGLEngineSharedShaders::findProgramInCache(const QGLEngineShaderProg &prog)
{
for (int i = 0; i < cachedPrograms.size(); ++i) {
QGLEngineShaderProg *cachedProg = cachedPrograms[i];
if (*cachedProg == prog) {
// Move the program to the top of the list as a poor-man's cache algo
cachedPrograms.move(i, 0);
cachedProg->program->bind();
return cachedProg;
}
}
QScopedPointer<QGLEngineShaderProg> newProg;
do {
QByteArray fragSource;
// Insert the custom stage before the srcPixel shader to work around an ATI driver bug
// where you cannot forward declare a function that takes a sampler as argument.
if (prog.srcPixelFragShader == CustomImageSrcFragmentShader)
fragSource.append(prog.customStageSource);
fragSource.append(qShaderSnippets[prog.mainFragShader]);
fragSource.append(qShaderSnippets[prog.srcPixelFragShader]);
if (prog.compositionFragShader)
fragSource.append(qShaderSnippets[prog.compositionFragShader]);
if (prog.maskFragShader)
fragSource.append(qShaderSnippets[prog.maskFragShader]);
QByteArray vertexSource;
vertexSource.append(qShaderSnippets[prog.mainVertexShader]);
vertexSource.append(qShaderSnippets[prog.positionVertexShader]);
QScopedPointer<QGLShaderProgram> shaderProgram(new QGLShaderProgram);
CachedShader shaderCache(fragSource, vertexSource);
bool inCache = shaderCache.load(shaderProgram.data(), QGLContext::currentContext());
if (!inCache) {
QScopedPointer<QGLShader> fragShader(new QGLShader(QGLShader::Fragment));
QByteArray description;
#if defined(QT_DEBUG)
// Name the shader for easier debugging
description.append("Fragment shader: main=");
description.append(snippetNameStr(prog.mainFragShader));
description.append(", srcPixel=");
description.append(snippetNameStr(prog.srcPixelFragShader));
if (prog.compositionFragShader) {
description.append(", composition=");
description.append(snippetNameStr(prog.compositionFragShader));
}
if (prog.maskFragShader) {
description.append(", mask=");
description.append(snippetNameStr(prog.maskFragShader));
}
fragShader->setObjectName(QString::fromLatin1(description));
#endif
if (!fragShader->compileSourceCode(fragSource)) {
qWarning() << "Warning:" << description << "failed to compile!";
break;
}
QScopedPointer<QGLShader> vertexShader(new QGLShader(QGLShader::Vertex));
#if defined(QT_DEBUG)
// Name the shader for easier debugging
description.clear();
description.append("Vertex shader: main=");
description.append(snippetNameStr(prog.mainVertexShader));
description.append(", position=");
description.append(snippetNameStr(prog.positionVertexShader));
vertexShader->setObjectName(QString::fromLatin1(description));
#endif
if (!vertexShader->compileSourceCode(vertexSource)) {
qWarning() << "Warning:" << description << "failed to compile!";
break;
}
shaders.append(vertexShader.data());
shaders.append(fragShader.data());
shaderProgram->addShader(vertexShader.take());
shaderProgram->addShader(fragShader.take());
// We have to bind the vertex attribute names before the program is linked:
shaderProgram->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
if (prog.useTextureCoords)
shaderProgram->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);
if (prog.useOpacityAttribute)
shaderProgram->bindAttributeLocation("opacityArray", QT_OPACITY_ATTR);
if (prog.usePmvMatrixAttribute) {
shaderProgram->bindAttributeLocation("pmvMatrix1", QT_PMV_MATRIX_1_ATTR);
shaderProgram->bindAttributeLocation("pmvMatrix2", QT_PMV_MATRIX_2_ATTR);
shaderProgram->bindAttributeLocation("pmvMatrix3", QT_PMV_MATRIX_3_ATTR);
}
}
newProg.reset(new QGLEngineShaderProg(prog));
newProg->program = shaderProgram.take();
newProg->program->link();
if (newProg->program->isLinked()) {
if (!inCache)
shaderCache.store(newProg->program, QGLContext::currentContext());
} else {
QLatin1String none("none");
QLatin1String br("\n");
QString error;
error = QLatin1String("Shader program failed to link,");
#if defined(QT_DEBUG)
error += QLatin1String("\n Shaders Used:\n");
for (int i = 0; i < newProg->program->shaders().count(); ++i) {
QGLShader *shader = newProg->program->shaders().at(i);
error += QLatin1String(" ") + shader->objectName() + QLatin1String(": \n")
+ QLatin1String(shader->sourceCode()) + br;
}
#endif
error += QLatin1String(" Error Log:\n")
+ QLatin1String(" ") + newProg->program->log();
qWarning() << error;
break;
}
newProg->program->bind();
if (newProg->maskFragShader != QGLEngineSharedShaders::NoMaskFragmentShader) {
GLuint location = newProg->program->uniformLocation("maskTexture");
newProg->program->setUniformValue(location, QT_MASK_TEXTURE_UNIT);
}
if (cachedPrograms.count() > 30) {
// The cache is full, so delete the last 5 programs in the list.
// These programs will be least used, as a program us bumped to
// the top of the list when it's used.
for (int i = 0; i < 5; ++i) {
delete cachedPrograms.last();
cachedPrograms.removeLast();
}
}
cachedPrograms.insert(0, newProg.data());
} while (false);
return newProg.take();
}
