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/*
* Copyright (C) 2010 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.
*/
#define LOG_TAG "OpenGLRenderer"
#include "Caches.h"
namespace android {
#ifdef USE_OPENGL_RENDERER
using namespace uirenderer;
ANDROID_SINGLETON_STATIC_INSTANCE(Caches);
#endif
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
Caches::Caches(): Singleton<Caches>(), blend(false), lastSrcMode(GL_ZERO),
lastDstMode(GL_ZERO), currentProgram(NULL) {
GLint maxTextureUnits;
glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
if (maxTextureUnits < REQUIRED_TEXTURE_UNITS_COUNT) {
LOGW("At least %d texture units are required!", REQUIRED_TEXTURE_UNITS_COUNT);
}
glGenBuffers(1, &meshBuffer);
glBindBuffer(GL_ARRAY_BUFFER, meshBuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(gMeshVertices), gMeshVertices, GL_STATIC_DRAW);
currentBuffer = meshBuffer;
}
/**
* Binds the VBO used to render simple textured quads.
*/
void Caches::bindMeshBuffer() {
bindMeshBuffer(meshBuffer);
}
/**
* Binds the specified VBO.
*/
void Caches::bindMeshBuffer(const GLuint buffer) {
if (currentBuffer != buffer) {
glBindBuffer(GL_ARRAY_BUFFER, buffer);
currentBuffer = buffer;
}
}
/**
* Unbinds the VBO used to render simple textured quads.
*/
void Caches::unbindMeshBuffer() {
if (currentBuffer) {
glBindBuffer(GL_ARRAY_BUFFER, 0);
currentBuffer = 0;
}
}
}; // namespace uirenderer
}; // namespace android
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