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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "RenderState.h"
namespace android {
namespace uirenderer {
RenderState::RenderState()
: mCaches(NULL)
, mViewportWidth(0)
, mViewportHeight(0)
, mFramebuffer(0) {
}
RenderState::~RenderState() {
}
void RenderState::onGLContextCreated() {
// This is delayed because the first access of Caches makes GL calls
mCaches = &Caches::getInstance();
mCaches->init();
mCaches->setRenderState(this);
}
void RenderState::onGLContextDestroyed() {
if (CC_UNLIKELY(!mActiveLayers.empty())) {
mCaches->dumpMemoryUsage();
LOG_ALWAYS_FATAL("layers have survived gl context destruction");
}
}
void RenderState::setViewport(GLsizei width, GLsizei height) {
mViewportWidth = width;
mViewportHeight = height;
glViewport(0, 0, mViewportWidth, mViewportHeight);
}
void RenderState::getViewport(GLsizei* outWidth, GLsizei* outHeight) {
*outWidth = mViewportWidth;
*outHeight = mViewportHeight;
}
void RenderState::bindFramebuffer(GLuint fbo) {
if (mFramebuffer != fbo) {
mFramebuffer = fbo;
glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
}
}
void RenderState::invokeFunctor(Functor* functor, DrawGlInfo::Mode mode, DrawGlInfo* info) {
interruptForFunctorInvoke();
(*functor)(mode, info);
resumeFromFunctorInvoke();
}
void RenderState::interruptForFunctorInvoke() {
if (mCaches->currentProgram) {
if (mCaches->currentProgram->isInUse()) {
mCaches->currentProgram->remove();
mCaches->currentProgram = NULL;
}
}
mCaches->resetActiveTexture();
mCaches->unbindMeshBuffer();
mCaches->unbindIndicesBuffer();
mCaches->resetVertexPointers();
mCaches->disableTexCoordsVertexArray();
debugOverdraw(false, false);
}
void RenderState::resumeFromFunctorInvoke() {
glViewport(0, 0, mViewportWidth, mViewportHeight);
glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
debugOverdraw(false, false);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
mCaches->scissorEnabled = glIsEnabled(GL_SCISSOR_TEST);
mCaches->enableScissor();
mCaches->resetScissor();
mCaches->activeTexture(0);
mCaches->resetBoundTextures();
mCaches->blend = true;
glEnable(GL_BLEND);
glBlendFunc(mCaches->lastSrcMode, mCaches->lastDstMode);
glBlendEquation(GL_FUNC_ADD);
}
void RenderState::debugOverdraw(bool enable, bool clear) {
if (mCaches->debugOverdraw && mFramebuffer == 0) {
if (clear) {
mCaches->disableScissor();
mCaches->stencil.clear();
}
if (enable) {
mCaches->stencil.enableDebugWrite();
} else {
mCaches->stencil.disable();
}
}
}
} /* namespace uirenderer */
} /* namespace android */
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