//-----------------------------------------------------------------------------
GLES2FrameBufferObject::GLES2FrameBufferObject(GLES2FBOManager *manager, uint fsaa):
mManager(manager), mNumSamples(fsaa)
{
GLES2Support* glSupport = getGLES2SupportRef();
// Generate framebuffer object
OGRE_CHECK_GL_ERROR(glGenFramebuffers(1, &mFB));
if(glSupport->checkExtension("GL_EXT_debug_label"))
{
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
OGRE_CHECK_GL_ERROR(glLabelObjectEXT(GL_BUFFER_OBJECT_EXT, mFB, 0, ("FBO #" + StringConverter::toString(mFB)).c_str()));
}
mNumSamples = 0;
mMultisampleFB = 0;
// Check multisampling if supported
if(glSupport->hasMinGLVersion(3, 0))
{
// Check samples supported
OGRE_CHECK_GL_ERROR(glBindFramebuffer(GL_FRAMEBUFFER, mFB));
GLint maxSamples;
OGRE_CHECK_GL_ERROR(glGetIntegerv(GL_MAX_SAMPLES_APPLE, &maxSamples));
OGRE_CHECK_GL_ERROR(glBindFramebuffer(GL_FRAMEBUFFER, 0));
mNumSamples = std::min(mNumSamples, (GLsizei)maxSamples);
}
// Will we need a second FBO to do multisampling?
if (mNumSamples)
{
OGRE_CHECK_GL_ERROR(glGenFramebuffers(1, &mMultisampleFB));
if(glSupport->checkExtension("GL_EXT_debug_label"))
{
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
OGRE_CHECK_GL_ERROR(glLabelObjectEXT(GL_BUFFER_OBJECT_EXT, mMultisampleFB, 0, ("MSAA FBO #" + StringConverter::toString(mMultisampleFB)).c_str()));
}
}
else
{
mMultisampleFB = 0;
}
// Initialise state
mDepth.buffer = 0;
mStencil.buffer = 0;
for(size_t x = 0; x < OGRE_MAX_MULTIPLE_RENDER_TARGETS; ++x)
{
mColour[x].buffer=0;
}
}
GLSLESProgramPipeline::~GLSLESProgramPipeline()
{
#if GL_EXT_separate_shader_objects && OGRE_PLATFORM != OGRE_PLATFORM_NACL
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
OGRE_CHECK_GL_ERROR(glDeleteProgramPipelinesEXT(1, &mGLProgramPipelineHandle));
#endif
}
//------------------------------------------------------------------
void GLES2HardwareOcclusionQuery::endOcclusionQuery()
{
#ifdef GL_EXT_occlusion_query_boolean
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
OGRE_CHECK_GL_ERROR(glEndQueryEXT(GL_ANY_SAMPLES_PASSED_EXT));
#endif
}
//------------------------------------------------------------------
void GLES2HardwareOcclusionQuery::destroyQuery()
{
#ifdef GL_EXT_occlusion_query_boolean
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
OGRE_CHECK_GL_ERROR(glDeleteQueriesEXT(1, &mQueryID));
#endif
}
//------------------------------------------------------------------
bool GLES2HardwareOcclusionQuery::pullOcclusionQuery( unsigned int* NumOfFragments )
{
#ifdef GL_EXT_occlusion_query_boolean
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
OGRE_CHECK_GL_ERROR(glGetQueryObjectuivEXT(mQueryID, GL_QUERY_RESULT_EXT, (GLuint*)NumOfFragments));
mPixelCount = *NumOfFragments;
return true;
#else
return false;
#endif
}
//------------------------------------------------------------------
void GLES2HardwareOcclusionQuery::createQuery()
{
// Check for hardware occlusion support
#ifdef GL_EXT_occlusion_query_boolean
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
OGRE_CHECK_GL_ERROR(glGenQueriesEXT(1, &mQueryID ));
#else
OGRE_EXCEPT( Exception::ERR_INTERNAL_ERROR,
"Cannot allocate a Hardware query. This video card doesn't support it, sorry.",
"GLES2HardwareOcclusionQuery::GLES2HardwareOcclusionQuery" );
#endif
}
//------------------------------------------------------------------
bool GLES2HardwareOcclusionQuery::isStillOutstanding(void)
{
GLuint available = GL_FALSE;
#ifdef GL_EXT_occlusion_query_boolean
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
OGRE_CHECK_GL_ERROR(glGetQueryObjectuivEXT(mQueryID, GL_QUERY_RESULT_AVAILABLE_EXT, &available));
#endif
// GL_TRUE means a wait would occur
return !(available == GL_TRUE);
}
void GLES2HardwareVertexBuffer::createBuffer()
{
OGRE_CHECK_GL_ERROR(glGenBuffers(1, &mBufferId));
if(getGLES2SupportRef()->checkExtension("GL_EXT_debug_label"))
{
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
OGRE_CHECK_GL_ERROR(glLabelObjectEXT(GL_BUFFER_OBJECT_EXT, mBufferId, 0, ("Vertex Buffer #" + StringConverter::toString(mBufferId)).c_str()));
}
if (!mBufferId)
{
OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR,
"Cannot create GL ES vertex buffer",
"GLES2HardwareVertexBuffer::GLES2HardwareVertexBuffer");
}
static_cast<GLES2HardwareBufferManagerBase*>(mMgr)->getStateCacheManager()->bindGLBuffer(GL_ARRAY_BUFFER, mBufferId);
OGRE_CHECK_GL_ERROR(glBufferData(GL_ARRAY_BUFFER, mSizeInBytes, NULL,
GLES2HardwareBufferManager::getGLUsage(mUsage)));
}
bool GLSLESProgram::compile(const bool checkErrors)
{
if (mCompiled == 1)
{
return true;
}
// Only create a shader object if glsl es is supported
if (isSupported())
{
// Create shader object
GLenum shaderType = 0x0000;
if (mType == GPT_VERTEX_PROGRAM)
{
shaderType = GL_VERTEX_SHADER;
}
else if (mType == GPT_FRAGMENT_PROGRAM)
{
shaderType = GL_FRAGMENT_SHADER;
}
OGRE_CHECK_GL_ERROR(mGLShaderHandle = glCreateShader(shaderType));
#if OGRE_PLATFORM != OGRE_PLATFORM_NACL
if(getGLES2SupportRef()->checkExtension("GL_EXT_debug_label"))
{
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
glLabelObjectEXT(GL_SHADER_OBJECT_EXT, mGLShaderHandle, 0, mName.c_str());
}
#endif
if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS))
{
OGRE_CHECK_GL_ERROR(mGLProgramHandle = glCreateProgram());
#if OGRE_PLATFORM != OGRE_PLATFORM_NACL
if(getGLES2SupportRef()->checkExtension("GL_EXT_debug_label"))
{
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
glLabelObjectEXT(GL_PROGRAM_OBJECT_EXT, mGLProgramHandle, 0, mName.c_str());
}
#endif
}
}
// Add preprocessor extras and main source
if (!mSource.empty())
{
// Fix up the source in case someone forgot to redeclare gl_Position
if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS) &&
mType == GPT_VERTEX_PROGRAM)
{
size_t versionPos = mSource.find("#version");
int shaderVersion = StringConverter::parseInt(mSource.substr(versionPos+9, 3));
// Check that it's missing and that this shader has a main function, ie. not a child shader.
if(mSource.find("out highp vec4 gl_Position") == String::npos)
{
if(shaderVersion >= 300)
mSource.insert(versionPos+16, "out highp vec4 gl_Position;\nout highp float gl_PointSize;\n");
}
if(mSource.find("#extension GL_EXT_separate_shader_objects : require") == String::npos)
{
if(shaderVersion >= 300)
mSource.insert(versionPos+16, "#extension GL_EXT_separate_shader_objects : require\n");
}
}
#if !OGRE_NO_GLES2_GLSL_OPTIMISER
const char *source = (getOptimiserEnabled() && getIsOptimised()) ? mOptimisedSource.c_str() : mSource.c_str();
#else
const char *source = mSource.c_str();
#endif
OGRE_CHECK_GL_ERROR(glShaderSource(mGLShaderHandle, 1, &source, NULL));
}
if (checkErrors)
logObjectInfo("GLSL ES compiling: " + mName, mGLShaderHandle);
OGRE_CHECK_GL_ERROR(glCompileShader(mGLShaderHandle));
// Check for compile errors
OGRE_CHECK_GL_ERROR(glGetShaderiv(mGLShaderHandle, GL_COMPILE_STATUS, &mCompiled));
if(!mCompiled && checkErrors)
{
String message = logObjectInfo("GLSL ES compile log: " + mName, mGLShaderHandle);
checkAndFixInvalidDefaultPrecisionError(message);
}
// Log a message that the shader compiled successfully.
if (mCompiled && checkErrors)
logObjectInfo("GLSL ES compiled: " + mName, mGLShaderHandle);
if(!mCompiled)
{
OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR,
((mType == GPT_VERTEX_PROGRAM) ? "Vertex Program " : "Fragment Program ") + mName +
" failed to compile. See compile log above for details.",
"GLSLESProgram::compile");
}
return (mCompiled == 1);
}
void GLSLESProgramPipeline::compileAndLink()
{
#if GL_EXT_separate_shader_objects && OGRE_PLATFORM != OGRE_PLATFORM_NACL
GLint linkStatus = 0;
OGRE_CHECK_GL_ERROR(glGenProgramPipelinesEXT(1, &mGLProgramPipelineHandle));
OGRE_CHECK_GL_ERROR(glBindProgramPipelineEXT(mGLProgramPipelineHandle));
// Compile and attach Vertex Program
if(mVertexProgram && !mVertexProgram->isLinked())
{
try
{
mVertexProgram->getGLSLProgram()->compile(true);
}
catch (Exception& e)
{
LogManager::getSingleton().stream() << e.getDescription();
mTriedToLinkAndFailed = true;
return;
}
GLuint programHandle = mVertexProgram->getGLSLProgram()->getGLProgramHandle();
OGRE_CHECK_GL_ERROR(glProgramParameteriEXT(programHandle, GL_PROGRAM_SEPARABLE_EXT, GL_TRUE));
mVertexProgram->getGLSLProgram()->attachToProgramObject(programHandle);
OGRE_CHECK_GL_ERROR(glLinkProgram(programHandle));
OGRE_CHECK_GL_ERROR(glGetProgramiv(programHandle, GL_LINK_STATUS, &linkStatus));
if(linkStatus)
{
mVertexProgram->setLinked(linkStatus);
mLinked |= VERTEX_PROGRAM_LINKED;
}
mTriedToLinkAndFailed = !linkStatus;
logObjectInfo( getCombinedName() + String("GLSL vertex program result : "), programHandle );
setSkeletalAnimationIncluded(mVertexProgram->isSkeletalAnimationIncluded());
}
// Compile and attach Fragment Program
if(mFragmentProgram && !mFragmentProgram->isLinked())
{
try
{
mFragmentProgram->getGLSLProgram()->compile(true);
}
catch (Exception& e)
{
LogManager::getSingleton().stream() << e.getDescription();
mTriedToLinkAndFailed = true;
return;
}
GLuint programHandle = mFragmentProgram->getGLSLProgram()->getGLProgramHandle();
OGRE_CHECK_GL_ERROR(glProgramParameteriEXT(programHandle, GL_PROGRAM_SEPARABLE_EXT, GL_TRUE));
mFragmentProgram->getGLSLProgram()->attachToProgramObject(programHandle);
OGRE_CHECK_GL_ERROR(glLinkProgram(programHandle));
OGRE_CHECK_GL_ERROR(glGetProgramiv(programHandle, GL_LINK_STATUS, &linkStatus));
if(linkStatus)
{
mFragmentProgram->setLinked(linkStatus);
mLinked |= FRAGMENT_PROGRAM_LINKED;
}
mTriedToLinkAndFailed = !linkStatus;
logObjectInfo( getCombinedName() + String("GLSL fragment program result : "), programHandle );
}
if(mLinked)
{
if(mVertexProgram && mVertexProgram->isLinked())
{
OGRE_CHECK_GL_ERROR(glUseProgramStagesEXT(mGLProgramPipelineHandle, GL_VERTEX_SHADER_BIT_EXT, mVertexProgram->getGLSLProgram()->getGLProgramHandle()));
}
if(mFragmentProgram && mFragmentProgram->isLinked())
{
OGRE_CHECK_GL_ERROR(glUseProgramStagesEXT(mGLProgramPipelineHandle, GL_FRAGMENT_SHADER_BIT_EXT, mFragmentProgram->getGLSLProgram()->getGLProgramHandle()));
}
// Validate pipeline
logObjectInfo( getCombinedName() + String("GLSL program pipeline result : "), mGLProgramPipelineHandle );
#if GL_EXT_debug_label && OGRE_PLATFORM != OGRE_PLATFORM_NACL
if(mVertexProgram && mFragmentProgram)
OGRE_IF_IOS_VERSION_IS_GREATER_THAN(5.0)
glLabelObjectEXT(GL_PROGRAM_PIPELINE_OBJECT_EXT, mGLProgramPipelineHandle, 0,
(mVertexProgram->getName() + "/" + mFragmentProgram->getName()).c_str());
#endif
}
#endif
}
