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/*
* Copyright (C) 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 <android/native_window.h>
#include <stdlib.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include "ContextSwitchRenderer.h"
#include <graphics/GLUtils.h>
#define LOG_TAG "CTS_OPENGL"
#define LOG_NDEBUG 0
#include <utils/Log.h>
#include <Trace.h>
static const EGLint contextAttribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE };
static const int NUM_WORKER_CONTEXTS = 7;
static const int CS_TEXTURE_SIZE = 64;
static const int CS_NUM_VERTICES = 6;
static const float CS_VERTICES[CS_NUM_VERTICES * 3] = {
0.1f, 0.1f, -0.1f,
-0.1f, 0.1f, -0.1f,
-0.1f, -0.1f, -0.1f,
-0.1f, -0.1f, -0.1f,
0.1f, -0.1f, -0.1f,
0.1f, 0.1f, -0.1f };
static const float CS_TEX_COORDS[CS_NUM_VERTICES * 2] = {
1.0f, 1.0f,
0.0f, 1.0f,
0.0f, 0.0f,
0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f };
static const char* CS_VERTEX =
"attribute vec4 a_Position;"
"attribute vec2 a_TexCoord;"
"uniform float u_Translate;"
"varying vec2 v_TexCoord;"
"void main() {"
" v_TexCoord = a_TexCoord;"
" gl_Position.x = a_Position.x + u_Translate;"
" gl_Position.yzw = a_Position.yzw;"
"}";
static const char* CS_FRAGMENT =
"precision mediump float;"
"uniform sampler2D u_Texture;"
"varying vec2 v_TexCoord;"
"void main() {"
" gl_FragColor = texture2D(u_Texture, v_TexCoord);"
"}";
ContextSwitchRenderer::ContextSwitchRenderer(ANativeWindow* window, bool offscreen, int workload) :
Renderer(window, offscreen, workload), mContexts(NULL) {
}
bool ContextSwitchRenderer::setUp() {
SCOPED_TRACE();
if (!Renderer::setUp()) {
return false;
}
// Setup texture.
mTextureId = GLUtils::genTexture(CS_TEXTURE_SIZE, CS_TEXTURE_SIZE, GLUtils::RANDOM_FILL);
if (mTextureId == 0) {
return false;
}
// Create program.
mProgramId = GLUtils::createProgram(&CS_VERTEX, &CS_FRAGMENT);
if (mProgramId == 0) {
return false;
}
// Bind attributes.
mTextureUniformHandle = glGetUniformLocation(mProgramId, "u_Texture");
mTranslateUniformHandle = glGetUniformLocation(mProgramId, "u_Translate");
mPositionHandle = glGetAttribLocation(mProgramId, "a_Position");
mTexCoordHandle = glGetAttribLocation(mProgramId, "a_TexCoord");
mContexts = new EGLContext[NUM_WORKER_CONTEXTS];
mFboIds = new GLuint[NUM_WORKER_CONTEXTS];
for (int i = 0; i < NUM_WORKER_CONTEXTS; i++) {
// Create the contexts, they share data with the main one.
mContexts[i] = eglCreateContext(mEglDisplay, mGlConfig, mEglContext, contextAttribs);
if (EGL_NO_CONTEXT == mContexts[i] || EGL_SUCCESS != eglGetError()) {
return false;
}
if (!eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mContexts[i])
|| EGL_SUCCESS != eglGetError()) {
return false;
}
if (mOffscreen) {
// FBOs are not shared across contexts, textures and renderbuffers are though.
glGenFramebuffers(1, &mFboIds[i]);
glBindFramebuffer(GL_FRAMEBUFFER, mFboIds[i]);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, mFboDepthId);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, mFboTexId, 0);
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE) {
ALOGE("Framebuffer not complete: %d", status);
return false;
}
}
}
return true;
}
bool ContextSwitchRenderer::tearDown() {
SCOPED_TRACE();
if (mContexts) {
// Destroy the contexts, the main one will be handled by Renderer::tearDown().
for (int i = 0; i < NUM_WORKER_CONTEXTS; i++) {
if (mOffscreen) {
if (mFboIds[i] != 0) {
eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mContexts[i]);
glDeleteFramebuffers(1, &mFboIds[i]);
mFboIds[i] = 0;
}
}
eglDestroyContext(mEglDisplay, mContexts[i]);
}
delete[] mContexts;
}
eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext);
if (mTextureId != 0) {
glDeleteTextures(1, &mTextureId);
mTextureId = 0;
}
if (!Renderer::tearDown()) {
return false;
}
return true;
}
void ContextSwitchRenderer::drawWorkload() {
SCOPED_TRACE();
// Set the background clear color to black.
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
// No culling of back faces
glDisable(GL_CULL_FACE);
// No depth testing
glDisable(GL_DEPTH_TEST);
EGLSyncKHR fence = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_FENCE_KHR, NULL);
const int TOTAL_NUM_CONTEXTS = NUM_WORKER_CONTEXTS + 1;
const float TRANSLATION = 0.9f - (TOTAL_NUM_CONTEXTS * 0.2f);
for (int i = 0; i < TOTAL_NUM_CONTEXTS; i++) {
eglWaitSyncKHR(mEglDisplay, fence, 0);
eglDestroySyncKHR(mEglDisplay, fence);
glUseProgram(mProgramId);
// Set the texture.
glActiveTexture (GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, mTextureId);
glUniform1i(mTextureUniformHandle, 0);
// Set the x translate.
glUniform1f(mTranslateUniformHandle, (i * 0.2f) + TRANSLATION);
glEnableVertexAttribArray(mPositionHandle);
glEnableVertexAttribArray(mTexCoordHandle);
glVertexAttribPointer(mPositionHandle, 3, GL_FLOAT, false, 0, CS_VERTICES);
glVertexAttribPointer(mTexCoordHandle, 2, GL_FLOAT, false, 0, CS_TEX_COORDS);
glDrawArrays(GL_TRIANGLES, 0, CS_NUM_VERTICES);
fence = eglCreateSyncKHR(mEglDisplay, EGL_SYNC_FENCE_KHR, NULL);
// Switch to next context.
if (i < (mWorkload - 1)) {
eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mContexts[i]);
// Switch to FBO and re-attach.
if (mOffscreen) {
glBindFramebuffer(GL_FRAMEBUFFER, mFboIds[i]);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, mFboDepthId);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, mFboTexId, 0);
glViewport(0, 0, mFboWidth, mFboHeight);
}
}
GLuint err = glGetError();
if (err != GL_NO_ERROR) {
ALOGE("GLError %d in drawWorkload", err);
break;
}
}
// Switch back to the main context.
eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface, mEglContext);
if (mOffscreen) {
glBindFramebuffer(GL_FRAMEBUFFER, mFboId);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, mFboDepthId);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, mFboTexId, 0);
glViewport(0, 0, mFboWidth, mFboHeight);
}
}