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/*
* Copyright 2013 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 <cutils/log.h>
#include "RenderEngine.h"
#include "GLES10RenderEngine.h"
#include "GLES11RenderEngine.h"
#include "GLExtensions.h"
// ---------------------------------------------------------------------------
namespace android {
// ---------------------------------------------------------------------------
RenderEngine* RenderEngine::create(EGLDisplay display, EGLConfig config) {
// Also create our EGLContext
EGLint contextAttributes[] = {
// EGL_CONTEXT_CLIENT_VERSION, 2,
#ifdef EGL_IMG_context_priority
#ifdef HAS_CONTEXT_PRIORITY
#warning "using EGL_IMG_context_priority"
EGL_CONTEXT_PRIORITY_LEVEL_IMG, EGL_CONTEXT_PRIORITY_HIGH_IMG,
#endif
#endif
EGL_NONE, EGL_NONE
};
EGLContext ctxt = eglCreateContext(display, config, NULL, contextAttributes);
if (ctxt == EGL_NO_CONTEXT) {
// maybe ES 2.x is not supported
ALOGW("can't create an ES 2.x context, trying 1.x");
ctxt = eglCreateContext(display, config, NULL, contextAttributes + 2);
}
// if can't create a GL context, we can only abort.
LOG_ALWAYS_FATAL_IF(ctxt==EGL_NO_CONTEXT, "EGLContext creation failed");
// now figure out what version of GL did we actually get
// NOTE: a dummy surface is not needed if KHR_create_context is supported
EGLint attribs[] = { EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE, EGL_NONE };
EGLSurface dummy = eglCreatePbufferSurface(display, config, attribs);
LOG_ALWAYS_FATAL_IF(dummy==EGL_NO_SURFACE, "can't create dummy pbuffer");
EGLBoolean success = eglMakeCurrent(display, dummy, dummy, ctxt);
LOG_ALWAYS_FATAL_IF(!success, "can't make dummy pbuffer current");
GLExtensions& extensions(GLExtensions::getInstance());
extensions.initWithGLStrings(
glGetString(GL_VENDOR),
glGetString(GL_RENDERER),
glGetString(GL_VERSION),
glGetString(GL_EXTENSIONS));
GlesVersion version = parseGlesVersion( extensions.getVersion() );
// initialize the renderer while GL is current
RenderEngine* engine = NULL;
switch (version) {
case GLES_VERSION_1_0:
engine = new GLES10RenderEngine();
break;
case GLES_VERSION_1_1:
engine = new GLES11RenderEngine();
break;
case GLES_VERSION_2_0:
case GLES_VERSION_3_0:
//engine = new GLES20RenderEngine();
break;
}
engine->setEGLContext(ctxt);
ALOGI("OpenGL ES informations:");
ALOGI("vendor : %s", extensions.getVendor());
ALOGI("renderer : %s", extensions.getRenderer());
ALOGI("version : %s", extensions.getVersion());
ALOGI("extensions: %s", extensions.getExtension());
ALOGI("GL_MAX_TEXTURE_SIZE = %d", engine->getMaxTextureSize());
ALOGI("GL_MAX_VIEWPORT_DIMS = %d", engine->getMaxViewportDims());
eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroySurface(display, dummy);
return engine;
}
RenderEngine::RenderEngine() : mEGLContext(EGL_NO_CONTEXT) {
}
RenderEngine::~RenderEngine() {
}
void RenderEngine::setEGLContext(EGLContext ctxt) {
mEGLContext = ctxt;
}
EGLContext RenderEngine::getEGLContext() const {
return mEGLContext;
}
void RenderEngine::checkErrors() const {
do {
// there could be more than one error flag
GLenum error = glGetError();
if (error == GL_NO_ERROR)
break;
ALOGE("GL error 0x%04x", int(error));
} while (true);
}
RenderEngine::GlesVersion RenderEngine::parseGlesVersion(const char* str) {
int major, minor;
if (sscanf(str, "OpenGL ES-CM %d.%d", &major, &minor) != 2) {
if (sscanf(str, "OpenGL ES %d.%d", &major, &minor) != 2) {
ALOGW("Unable to parse GL_VERSION string: \"%s\"", str);
return GLES_VERSION_1_0;
}
}
if (major == 1 && minor == 0) return GLES_VERSION_1_0;
if (major == 1 && minor >= 1) return GLES_VERSION_1_1;
if (major == 2 && minor >= 0) return GLES_VERSION_2_0;
if (major == 3 && minor >= 0) return GLES_VERSION_3_0;
ALOGW("Unrecognized OpenGL ES version: %d.%d", major, minor);
return GLES_VERSION_1_0;
}
// ---------------------------------------------------------------------------
}; // namespace android
// ---------------------------------------------------------------------------
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