void GL3PlusRenderToVertexBuffer::update(SceneManager* sceneMgr)
{
// size_t bufSize = mVertexData->vertexDeclaration->getVertexSize(0) * mMaxVertexCount;
// if (mVertexBuffers[0].isNull() || mVertexBuffers[0]->getSizeInBytes() != bufSize)
// {
// // Buffers don't match. Need to reallocate.
// mResetRequested = true;
// }
// if (mResetRequested || mResetsEveryUpdate)
// {
// // Use source data to render to first buffer.
// mSourceRenderable->getRenderOperation(renderOp);
// targetBufferIndex = 0;
// }
// else
// {
// // Use current front buffer to render to back buffer.
// this->getRenderOperation(renderOp);
// targetBufferIndex = 1 - mSourceBufferIndex;
// }
// if (mVertexBuffers[targetBufferIndex].isNull() ||
// mVertexBuffers[targetBufferIndex]->getSizeInBytes() != bufSize)
// {
// reallocateBuffer(targetBufferIndex);
// }
// Single pass only for now.
Ogre::Pass* r2vbPass = mMaterial->getBestTechnique()->getPass(0);
// Set pass before binding buffers to activate the GPU programs.
sceneMgr->_setPass(r2vbPass);
if (mFirstUpdate)
{
bindVerticesOutput(r2vbPass);
mFirstUpdate = false;
}
// size_t targetBufferIndex = mSourceBufferIndex == 0 ? 0 : 1;
// Disable rasterization.
OGRE_CHECK_GL_ERROR(glEnable(GL_RASTERIZER_DISCARD));
// Bind shader parameters.
RenderSystem* targetRenderSystem = Root::getSingleton().getRenderSystem();
targetRenderSystem->_setWorldMatrix(Matrix4::IDENTITY);
targetRenderSystem->_setViewMatrix(Matrix4::IDENTITY);
targetRenderSystem->_setProjectionMatrix(Matrix4::IDENTITY);
if (r2vbPass->hasVertexProgram())
{
targetRenderSystem->bindGpuProgramParameters(GPT_VERTEX_PROGRAM,
r2vbPass->getVertexProgramParameters(), GPV_ALL);
}
if (r2vbPass->hasFragmentProgram())
{
targetRenderSystem->bindGpuProgramParameters(GPT_FRAGMENT_PROGRAM,
r2vbPass->getFragmentProgramParameters(), GPV_ALL);
}
if (r2vbPass->hasGeometryProgram())
{
targetRenderSystem->bindGpuProgramParameters(GPT_GEOMETRY_PROGRAM,
r2vbPass->getGeometryProgramParameters(), GPV_ALL);
}
//TODO add tessellation stages
// Bind source vertex array + target tranform feedback buffer.
GL3PlusHardwareVertexBuffer* targetVertexBuffer = static_cast<GL3PlusHardwareVertexBuffer*>(mVertexBuffers[mTargetBufferIndex].getPointer());
// OGRE_CHECK_GL_ERROR(glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, VertexBuffer[mTargetBufferIndex]));
OGRE_CHECK_GL_ERROR(glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, targetVertexBuffer->getGLBufferId()));
// OGRE_CHECK_GL_ERROR(glBindVertexArray(VertexArray[mSourceBufferIndex]));
if (Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS))
{
GLSLSeparableProgram* separableProgram =
GLSLSeparableProgramManager::getSingleton().getCurrentSeparableProgram();
separableProgram->activate();
separableProgram->getVertexArrayObject()->bind();
}
else
{
GLSLMonolithicProgram* monolithicProgram = GLSLMonolithicProgramManager::getSingleton().getActiveMonolithicProgram();
monolithicProgram->getVertexArrayObject()->bind();
}
// 'Render' data to the transform buffer.
OGRE_CHECK_GL_ERROR(glBeginQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN, mPrimitivesDrawnQuery));
OGRE_CHECK_GL_ERROR(glBeginTransformFeedback(getR2VBPrimitiveType(mOperationType)));
RenderOperation renderOp;
if (mResetRequested || mResetsEveryUpdate)
{
// Use source data to render to first buffer.
mSourceRenderable->getRenderOperation(renderOp);
}
else
{
// Use current front buffer to render to back buffer.
this->getRenderOperation(renderOp);
}
renderOp.renderToVertexBuffer = true;
targetRenderSystem->_render(renderOp);
// OGRE_CHECK_GL_ERROR(glDrawArrays(GL_POINTS, 0, 1));
//TODO GL4+
//glBindTransformFeedback(GL_TRANSFORM_FEEDBACK, mFeedbackObject);
//glDrawTransformFeedback(getR2VBPrimitiveType(mOperationType), mFeedbackObject);
OGRE_CHECK_GL_ERROR(glEndTransformFeedback());
OGRE_CHECK_GL_ERROR(glEndQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN));
// Read back query results.
GLuint primitivesWritten;
OGRE_CHECK_GL_ERROR(glGetQueryObjectuiv(mPrimitivesDrawnQuery, GL_QUERY_RESULT, &primitivesWritten));
mVertexData->vertexCount = primitivesWritten * getVertexCountPerPrimitive(mOperationType);
// Switch the vertex binding.
mVertexData->vertexBufferBinding->unsetAllBindings();
mVertexData->vertexBufferBinding->setBinding(0, mVertexBuffers[mTargetBufferIndex]);
mTargetBufferIndex = mTargetBufferIndex == 0 ? 1 : 0;
// Enable rasterization.
OGRE_CHECK_GL_ERROR(glDisable(GL_RASTERIZER_DISCARD));
// Clear the reset flag.
mResetRequested = false;
}
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
void GLRenderToVertexBuffer::update(SceneManager* sceneMgr)
{
checkGLError(true, false, "start of GLRenderToVertexBuffer::update");
size_t bufSize = mVertexData->vertexDeclaration->getVertexSize(0) * mMaxVertexCount;
if (mVertexBuffers[0].isNull() || mVertexBuffers[0]->getSizeInBytes() != bufSize)
{
//Buffers don't match. Need to reallocate.
mResetRequested = true;
}
//Single pass only for now
Ogre::Pass* r2vbPass = mMaterial->getBestTechnique()->getPass(0);
//Set pass before binding buffers to activate the GPU programs
sceneMgr->_setPass(r2vbPass);
checkGLError(true, false);
bindVerticesOutput(r2vbPass);
RenderOperation renderOp;
size_t targetBufferIndex;
if (mResetRequested || mResetsEveryUpdate)
{
//Use source data to render to first buffer
mSourceRenderable->getRenderOperation(renderOp);
targetBufferIndex = 0;
}
else
{
//Use current front buffer to render to back buffer
this->getRenderOperation(renderOp);
targetBufferIndex = 1 - mFrontBufferIndex;
}
if (mVertexBuffers[targetBufferIndex].isNull() ||
mVertexBuffers[targetBufferIndex]->getSizeInBytes() != bufSize)
{
reallocateBuffer(targetBufferIndex);
}
GLHardwareVertexBuffer* vertexBuffer = static_cast<GLHardwareVertexBuffer*>(mVertexBuffers[targetBufferIndex].getPointer());
GLuint bufferId = vertexBuffer->getGLBufferId();
//Bind the target buffer
glBindBufferOffsetNV(GL_TRANSFORM_FEEDBACK_BUFFER_NV, 0, bufferId, 0);
glBeginTransformFeedbackNV(getR2VBPrimitiveType(mOperationType));
glEnable(GL_RASTERIZER_DISCARD_NV); // disable rasterization
glBeginQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_NV, mPrimitivesDrawnQuery);
RenderSystem* targetRenderSystem = Root::getSingleton().getRenderSystem();
//Draw the object
targetRenderSystem->_setWorldMatrix(Matrix4::IDENTITY);
targetRenderSystem->_setViewMatrix(Matrix4::IDENTITY);
targetRenderSystem->_setProjectionMatrix(Matrix4::IDENTITY);
if (r2vbPass->hasVertexProgram())
{
targetRenderSystem->bindGpuProgramParameters(GPT_VERTEX_PROGRAM,
r2vbPass->getVertexProgramParameters(), GPV_ALL);
}
if (r2vbPass->hasGeometryProgram())
{
targetRenderSystem->bindGpuProgramParameters(GPT_GEOMETRY_PROGRAM,
r2vbPass->getGeometryProgramParameters(), GPV_ALL);
}
targetRenderSystem->_render(renderOp);
//Finish the query
glEndQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN_NV);
glDisable(GL_RASTERIZER_DISCARD_NV);
glEndTransformFeedbackNV();
//read back query results
GLuint primitivesWritten;
glGetQueryObjectuiv(mPrimitivesDrawnQuery, GL_QUERY_RESULT, &primitivesWritten);
mVertexData->vertexCount = primitivesWritten * getVertexCountPerPrimitive(mOperationType);
checkGLError(true, true, "GLRenderToVertexBuffer::update");
//Switch the vertex binding if neccesary
if (targetBufferIndex != mFrontBufferIndex)
{
mVertexData->vertexBufferBinding->unsetAllBindings();
mVertexData->vertexBufferBinding->setBinding(0, mVertexBuffers[targetBufferIndex]);
mFrontBufferIndex = targetBufferIndex;
}
glDisable(GL_RASTERIZER_DISCARD_NV); // enable rasterization
//Clear the reset flag
mResetRequested = false;
}
//-----------------------------------------------------------------------------
void GLES2RenderToVertexBuffer::update(SceneManager* sceneMgr)
{
size_t bufSize = mVertexData->vertexDeclaration->getVertexSize(0) * mMaxVertexCount;
if (!mVertexBuffers[0] || mVertexBuffers[0]->getSizeInBytes() != bufSize)
{
// Buffers don't match. Need to reallocate.
mResetRequested = true;
}
// Single pass only for now
Ogre::Pass* r2vbPass = mMaterial->getBestTechnique()->getPass(0);
// Set pass before binding buffers to activate the GPU programs
sceneMgr->_setPass(r2vbPass);
bindVerticesOutput(r2vbPass);
RenderOperation renderOp;
size_t targetBufferIndex;
if (mResetRequested || mResetsEveryUpdate)
{
// Use source data to render to first buffer
mSourceRenderable->getRenderOperation(renderOp);
targetBufferIndex = 0;
}
else
{
// Use current front buffer to render to back buffer
this->getRenderOperation(renderOp);
targetBufferIndex = 1 - mFrontBufferIndex;
}
if (!mVertexBuffers[targetBufferIndex] ||
mVertexBuffers[targetBufferIndex]->getSizeInBytes() != bufSize)
{
reallocateBuffer(targetBufferIndex);
}
GLES2HardwareVertexBuffer* vertexBuffer = static_cast<GLES2HardwareVertexBuffer*>(mVertexBuffers[targetBufferIndex].get());
/* if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS))
{
GLSLESProgramPipeline* programPipeline =
GLSLESProgramPipelineManager::getSingleton().getActiveProgramPipeline();
programPipeline->getVertexArrayObject()->bind();
}
else
{
GLSLESLinkProgram* linkProgram = GLSLESLinkProgramManager::getSingleton().getActiveLinkProgram();
linkProgram->getVertexArrayObject()->bind();
}
*/
// Bind the target buffer
OGRE_CHECK_GL_ERROR(glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, vertexBuffer->getGLBufferId()));
// Disable rasterization
OGRE_CHECK_GL_ERROR(glEnable(GL_RASTERIZER_DISCARD));
RenderSystem* targetRenderSystem = Root::getSingleton().getRenderSystem();
// Draw the object
targetRenderSystem->_setWorldMatrix(Matrix4::IDENTITY);
targetRenderSystem->_setViewMatrix(Matrix4::IDENTITY);
targetRenderSystem->_setProjectionMatrix(Matrix4::IDENTITY);
if (r2vbPass->hasVertexProgram())
{
targetRenderSystem->bindGpuProgramParameters(GPT_VERTEX_PROGRAM,
r2vbPass->getVertexProgramParameters(), GPV_ALL);
}
if (r2vbPass->hasFragmentProgram())
{
targetRenderSystem->bindGpuProgramParameters(GPT_FRAGMENT_PROGRAM,
r2vbPass->getFragmentProgramParameters(), GPV_ALL);
}
if (r2vbPass->hasGeometryProgram())
{
targetRenderSystem->bindGpuProgramParameters(GPT_GEOMETRY_PROGRAM,
r2vbPass->getGeometryProgramParameters(), GPV_ALL);
}
OGRE_CHECK_GL_ERROR(glBeginQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN, mPrimitivesDrawnQuery));
OGRE_CHECK_GL_ERROR(glBeginTransformFeedback(getR2VBPrimitiveType(mOperationType)));
targetRenderSystem->_render(renderOp);
OGRE_CHECK_GL_ERROR(glEndTransformFeedback());
// Finish the query
OGRE_CHECK_GL_ERROR(glEndQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN));
OGRE_CHECK_GL_ERROR(glDisable(GL_RASTERIZER_DISCARD));
// Read back query results
GLuint primitivesWritten;
OGRE_CHECK_GL_ERROR(glGetQueryObjectuiv(mPrimitivesDrawnQuery, GL_QUERY_RESULT, &primitivesWritten));
mVertexData->vertexCount = primitivesWritten * getVertexCountPerPrimitive(mOperationType);
// Switch the vertex binding if necessary
if (targetBufferIndex != mFrontBufferIndex)
{
mVertexData->vertexBufferBinding->unsetAllBindings();
mVertexData->vertexBufferBinding->setBinding(0, mVertexBuffers[targetBufferIndex]);
mFrontBufferIndex = targetBufferIndex;
}
// Enable rasterization
OGRE_CHECK_GL_ERROR(glDisable(GL_RASTERIZER_DISCARD));
// Clear the reset flag
mResetRequested = false;
}
