6a5d35dd5c
Add SRGBTest.RenderToSRGBSurface, which validates that passing the SRGB colorspace attributes to eglCreateWindowSurface actually results in an SRGB surface by comparing the output values to those of a standard RGB surface. Change-Id: I3d5fef8070ed8fa2357ddd1c5fcc849ae3fbd12a
475 lines
17 KiB
C++
475 lines
17 KiB
C++
/*
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* Copyright 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "SRGB_test"
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//#define LOG_NDEBUG 0
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#include "GLTest.h"
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#include <gui/CpuConsumer.h>
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#include <gui/Surface.h>
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#include <gui/SurfaceComposerClient.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <GLES3/gl3.h>
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#include <android/native_window.h>
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#include <gtest/gtest.h>
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namespace android {
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class SRGBTest : public ::testing::Test {
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protected:
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// Class constants
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enum {
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DISPLAY_WIDTH = 512,
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DISPLAY_HEIGHT = 512,
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PIXEL_SIZE = 4, // bytes or components
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DISPLAY_SIZE = DISPLAY_WIDTH * DISPLAY_HEIGHT * PIXEL_SIZE,
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ALPHA_VALUE = 223, // should be in [0, 255]
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TOLERANCE = 1,
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};
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static const char SHOW_DEBUG_STRING[];
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SRGBTest() :
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mInputSurface(), mCpuConsumer(), mLockedBuffer(),
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mEglDisplay(EGL_NO_DISPLAY), mEglConfig(),
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mEglContext(EGL_NO_CONTEXT), mEglSurface(EGL_NO_SURFACE),
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mComposerClient(), mSurfaceControl(), mOutputSurface() {
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}
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virtual ~SRGBTest() {
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if (mEglDisplay != EGL_NO_DISPLAY) {
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if (mEglSurface != EGL_NO_SURFACE) {
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eglDestroySurface(mEglDisplay, mEglSurface);
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}
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if (mEglContext != EGL_NO_CONTEXT) {
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eglDestroyContext(mEglDisplay, mEglContext);
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}
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eglMakeCurrent(mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE,
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EGL_NO_CONTEXT);
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eglTerminate(mEglDisplay);
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}
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}
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virtual void SetUp() {
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mBufferQueue = new BufferQueue();
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ASSERT_EQ(NO_ERROR, mBufferQueue->setDefaultBufferSize(
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DISPLAY_WIDTH, DISPLAY_HEIGHT));
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mCpuConsumer = new CpuConsumer(mBufferQueue, 1);
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String8 name("CpuConsumer_for_SRGBTest");
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mCpuConsumer->setName(name);
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mInputSurface = new Surface(mBufferQueue);
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ASSERT_NO_FATAL_FAILURE(createEGLSurface(mInputSurface.get()));
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ASSERT_NO_FATAL_FAILURE(createDebugSurface());
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}
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virtual void TearDown() {
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ASSERT_NO_FATAL_FAILURE(copyToDebugSurface());
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ASSERT_EQ(NO_ERROR, mCpuConsumer->unlockBuffer(mLockedBuffer));
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}
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static float linearToSRGB(float l) {
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if (l <= 0.0031308f) {
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return l * 12.92f;
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} else {
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return 1.055f * pow(l, (1 / 2.4f)) - 0.055f;
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}
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}
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static float srgbToLinear(float s) {
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if (s <= 0.04045) {
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return s / 12.92f;
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} else {
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return pow(((s + 0.055f) / 1.055f), 2.4f);
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}
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}
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static uint8_t srgbToLinear(uint8_t u) {
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float f = u / 255.0f;
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return static_cast<uint8_t>(srgbToLinear(f) * 255.0f + 0.5f);
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}
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void fillTexture(bool writeAsSRGB) {
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uint8_t* textureData = new uint8_t[DISPLAY_SIZE];
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for (int y = 0; y < DISPLAY_HEIGHT; ++y) {
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for (int x = 0; x < DISPLAY_WIDTH; ++x) {
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float realValue = static_cast<float>(x) / (DISPLAY_WIDTH - 1);
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realValue *= ALPHA_VALUE / 255.0f; // Premultiply by alpha
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if (writeAsSRGB) {
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realValue = linearToSRGB(realValue);
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}
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int offset = (y * DISPLAY_WIDTH + x) * PIXEL_SIZE;
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for (int c = 0; c < 3; ++c) {
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uint8_t intValue = static_cast<uint8_t>(
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realValue * 255.0f + 0.5f);
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textureData[offset + c] = intValue;
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}
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textureData[offset + 3] = ALPHA_VALUE;
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}
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}
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glTexImage2D(GL_TEXTURE_2D, 0, writeAsSRGB ? GL_SRGB8_ALPHA8 : GL_RGBA8,
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DISPLAY_WIDTH, DISPLAY_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE,
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textureData);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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delete[] textureData;
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}
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void initShaders() {
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static const char vertexSource[] =
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"attribute vec4 vPosition;\n"
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"varying vec2 texCoords;\n"
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"void main() {\n"
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" texCoords = 0.5 * (vPosition.xy + vec2(1.0, 1.0));\n"
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" gl_Position = vPosition;\n"
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"}\n";
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static const char fragmentSource[] =
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"precision mediump float;\n"
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"uniform sampler2D texSampler;\n"
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"varying vec2 texCoords;\n"
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"void main() {\n"
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" gl_FragColor = texture2D(texSampler, texCoords);\n"
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"}\n";
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GLuint program;
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{
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SCOPED_TRACE("Creating shader program");
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ASSERT_NO_FATAL_FAILURE(GLTest::createProgram(
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vertexSource, fragmentSource, &program));
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}
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GLint positionHandle = glGetAttribLocation(program, "vPosition");
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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ASSERT_NE(-1, positionHandle);
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GLint samplerHandle = glGetUniformLocation(program, "texSampler");
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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ASSERT_NE(-1, samplerHandle);
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static const GLfloat vertices[] = {
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-1.0f, 1.0f,
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-1.0f, -1.0f,
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1.0f, -1.0f,
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1.0f, 1.0f,
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};
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glVertexAttribPointer(positionHandle, 2, GL_FLOAT, GL_FALSE, 0, vertices);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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glEnableVertexAttribArray(positionHandle);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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glUseProgram(program);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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glUniform1i(samplerHandle, 0);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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GLuint textureHandle;
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glGenTextures(1, &textureHandle);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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glBindTexture(GL_TEXTURE_2D, textureHandle);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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}
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void drawTexture(bool asSRGB, GLint x, GLint y, GLsizei width,
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GLsizei height) {
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ASSERT_NO_FATAL_FAILURE(fillTexture(asSRGB));
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glViewport(x, y, width, height);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
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ASSERT_EQ(GL_NO_ERROR, glGetError());
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}
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void checkLockedBuffer(PixelFormat format) {
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ASSERT_EQ(mLockedBuffer.format, format);
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ASSERT_EQ(mLockedBuffer.width, DISPLAY_WIDTH);
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ASSERT_EQ(mLockedBuffer.height, DISPLAY_HEIGHT);
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}
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static bool withinTolerance(int a, int b) {
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int diff = a - b;
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return diff >= 0 ? diff <= TOLERANCE : -diff <= TOLERANCE;
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}
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// Primary producer and consumer
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sp<BufferQueue> mBufferQueue;
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sp<Surface> mInputSurface;
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sp<CpuConsumer> mCpuConsumer;
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CpuConsumer::LockedBuffer mLockedBuffer;
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EGLDisplay mEglDisplay;
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EGLConfig mEglConfig;
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EGLContext mEglContext;
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EGLSurface mEglSurface;
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// Auxiliary display output
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sp<SurfaceComposerClient> mComposerClient;
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sp<SurfaceControl> mSurfaceControl;
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sp<Surface> mOutputSurface;
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private:
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void createEGLSurface(Surface* inputSurface) {
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mEglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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ASSERT_NE(EGL_NO_DISPLAY, mEglDisplay);
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EXPECT_TRUE(eglInitialize(mEglDisplay, NULL, NULL));
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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static const EGLint configAttribs[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT_KHR,
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EGL_RED_SIZE, 8,
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EGL_GREEN_SIZE, 8,
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EGL_BLUE_SIZE, 8,
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EGL_ALPHA_SIZE, 8,
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EGL_NONE };
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EGLint numConfigs = 0;
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EXPECT_TRUE(eglChooseConfig(mEglDisplay, configAttribs, &mEglConfig, 1,
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&numConfigs));
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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static const EGLint contextAttribs[] = {
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EGL_CONTEXT_CLIENT_VERSION, 3,
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EGL_NONE } ;
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mEglContext = eglCreateContext(mEglDisplay, mEglConfig, EGL_NO_CONTEXT,
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contextAttribs);
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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ASSERT_NE(EGL_NO_CONTEXT, mEglContext);
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mEglSurface = eglCreateWindowSurface(mEglDisplay, mEglConfig,
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inputSurface, NULL);
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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ASSERT_NE(EGL_NO_SURFACE, mEglSurface);
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EXPECT_TRUE(eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface,
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mEglContext));
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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}
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void createDebugSurface() {
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if (getenv(SHOW_DEBUG_STRING) == NULL) return;
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mComposerClient = new SurfaceComposerClient;
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ASSERT_EQ(NO_ERROR, mComposerClient->initCheck());
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mSurfaceControl = mComposerClient->createSurface(
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String8("SRGBTest Surface"), DISPLAY_WIDTH, DISPLAY_HEIGHT,
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PIXEL_FORMAT_RGBA_8888);
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ASSERT_TRUE(mSurfaceControl != NULL);
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ASSERT_TRUE(mSurfaceControl->isValid());
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SurfaceComposerClient::openGlobalTransaction();
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ASSERT_EQ(NO_ERROR, mSurfaceControl->setLayer(0x7FFFFFFF));
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ASSERT_EQ(NO_ERROR, mSurfaceControl->show());
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SurfaceComposerClient::closeGlobalTransaction();
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ANativeWindow_Buffer outBuffer;
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ARect inOutDirtyBounds;
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mOutputSurface = mSurfaceControl->getSurface();
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mOutputSurface->lock(&outBuffer, &inOutDirtyBounds);
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uint8_t* bytePointer = reinterpret_cast<uint8_t*>(outBuffer.bits);
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for (int y = 0; y < outBuffer.height; ++y) {
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int rowOffset = y * outBuffer.stride; // pixels
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for (int x = 0; x < outBuffer.width; ++x) {
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int colOffset = (rowOffset + x) * PIXEL_SIZE; // bytes
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for (int c = 0; c < PIXEL_SIZE; ++c) {
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int offset = colOffset + c;
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bytePointer[offset] = ((c + 1) * 56) - 1;
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}
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}
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}
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mOutputSurface->unlockAndPost();
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}
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void copyToDebugSurface() {
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if (!mOutputSurface.get()) return;
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size_t bufferSize = mLockedBuffer.height * mLockedBuffer.stride *
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PIXEL_SIZE;
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ANativeWindow_Buffer outBuffer;
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ARect outBufferBounds;
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mOutputSurface->lock(&outBuffer, &outBufferBounds);
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ASSERT_EQ(mLockedBuffer.width, outBuffer.width);
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ASSERT_EQ(mLockedBuffer.height, outBuffer.height);
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ASSERT_EQ(mLockedBuffer.stride, outBuffer.stride);
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if (mLockedBuffer.format == outBuffer.format) {
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memcpy(outBuffer.bits, mLockedBuffer.data, bufferSize);
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} else {
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ASSERT_EQ(mLockedBuffer.format, PIXEL_FORMAT_sRGB_A_8888);
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ASSERT_EQ(outBuffer.format, PIXEL_FORMAT_RGBA_8888);
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uint8_t* outPointer = reinterpret_cast<uint8_t*>(outBuffer.bits);
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for (int y = 0; y < outBuffer.height; ++y) {
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int rowOffset = y * outBuffer.stride; // pixels
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for (int x = 0; x < outBuffer.width; ++x) {
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int colOffset = (rowOffset + x) * PIXEL_SIZE; // bytes
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// RGB are converted
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for (int c = 0; c < (PIXEL_SIZE - 1); ++c) {
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outPointer[colOffset + c] = srgbToLinear(
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mLockedBuffer.data[colOffset + c]);
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}
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// Alpha isn't converted
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outPointer[colOffset + 3] =
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mLockedBuffer.data[colOffset + 3];
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}
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}
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}
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mOutputSurface->unlockAndPost();
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int sleepSeconds = atoi(getenv(SHOW_DEBUG_STRING));
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sleep(sleepSeconds);
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}
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};
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const char SRGBTest::SHOW_DEBUG_STRING[] = "DEBUG_OUTPUT_SECONDS";
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TEST_F(SRGBTest, GLRenderFromSRGBTexture) {
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ASSERT_NO_FATAL_FAILURE(initShaders());
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// The RGB texture is displayed in the top half
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ASSERT_NO_FATAL_FAILURE(drawTexture(false, 0, DISPLAY_HEIGHT / 2,
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DISPLAY_WIDTH, DISPLAY_HEIGHT / 2));
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// The SRGB texture is displayed in the bottom half
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ASSERT_NO_FATAL_FAILURE(drawTexture(true, 0, 0,
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DISPLAY_WIDTH, DISPLAY_HEIGHT / 2));
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eglSwapBuffers(mEglDisplay, mEglSurface);
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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// Lock
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ASSERT_EQ(NO_ERROR, mCpuConsumer->lockNextBuffer(&mLockedBuffer));
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ASSERT_NO_FATAL_FAILURE(checkLockedBuffer(PIXEL_FORMAT_RGBA_8888));
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// Compare a pixel in the middle of each texture
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int midSRGBOffset = (DISPLAY_HEIGHT / 4) * mLockedBuffer.stride *
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PIXEL_SIZE;
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int midRGBOffset = midSRGBOffset * 3;
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midRGBOffset += (DISPLAY_WIDTH / 2) * PIXEL_SIZE;
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midSRGBOffset += (DISPLAY_WIDTH / 2) * PIXEL_SIZE;
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for (int c = 0; c < PIXEL_SIZE; ++c) {
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int expectedValue = mLockedBuffer.data[midRGBOffset + c];
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int actualValue = mLockedBuffer.data[midSRGBOffset + c];
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ASSERT_PRED2(withinTolerance, expectedValue, actualValue);
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}
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// mLockedBuffer is unlocked in TearDown so we can copy data from it to
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// the debug surface if necessary
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}
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TEST_F(SRGBTest, RenderToSRGBSurface) {
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ASSERT_NO_FATAL_FAILURE(initShaders());
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// By default, the first buffer we write into will be RGB
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// Render an RGB texture across the whole surface
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ASSERT_NO_FATAL_FAILURE(drawTexture(false, 0, 0,
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DISPLAY_WIDTH, DISPLAY_HEIGHT));
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eglSwapBuffers(mEglDisplay, mEglSurface);
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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// Lock
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ASSERT_EQ(NO_ERROR, mCpuConsumer->lockNextBuffer(&mLockedBuffer));
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ASSERT_NO_FATAL_FAILURE(checkLockedBuffer(PIXEL_FORMAT_RGBA_8888));
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// Save the values of the middle pixel for later comparison against SRGB
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uint8_t values[PIXEL_SIZE] = {};
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int middleOffset = (DISPLAY_HEIGHT / 2) * mLockedBuffer.stride *
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PIXEL_SIZE;
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middleOffset += (DISPLAY_WIDTH / 2) * PIXEL_SIZE;
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for (int c = 0; c < PIXEL_SIZE; ++c) {
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values[c] = mLockedBuffer.data[middleOffset + c];
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}
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// Unlock
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ASSERT_EQ(NO_ERROR, mCpuConsumer->unlockBuffer(mLockedBuffer));
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// Switch to SRGB window surface
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#define EGL_GL_COLORSPACE_KHR EGL_VG_COLORSPACE
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#define EGL_GL_COLORSPACE_SRGB_KHR EGL_VG_COLORSPACE_sRGB
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static const int srgbAttribs[] = {
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EGL_GL_COLORSPACE_KHR, EGL_GL_COLORSPACE_SRGB_KHR,
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EGL_NONE,
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};
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EXPECT_TRUE(eglMakeCurrent(mEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE,
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mEglContext));
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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EXPECT_TRUE(eglDestroySurface(mEglDisplay, mEglSurface));
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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mEglSurface = eglCreateWindowSurface(mEglDisplay, mEglConfig,
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mInputSurface.get(), srgbAttribs);
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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ASSERT_NE(EGL_NO_SURFACE, mEglSurface);
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EXPECT_TRUE(eglMakeCurrent(mEglDisplay, mEglSurface, mEglSurface,
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mEglContext));
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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// Render the texture again
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ASSERT_NO_FATAL_FAILURE(drawTexture(false, 0, 0,
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DISPLAY_WIDTH, DISPLAY_HEIGHT));
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eglSwapBuffers(mEglDisplay, mEglSurface);
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ASSERT_EQ(EGL_SUCCESS, eglGetError());
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// Lock
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ASSERT_EQ(NO_ERROR, mCpuConsumer->lockNextBuffer(&mLockedBuffer));
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// Make sure we actually got the SRGB buffer on the consumer side
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ASSERT_NO_FATAL_FAILURE(checkLockedBuffer(PIXEL_FORMAT_sRGB_A_8888));
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// Verify that the stored value is the same, accounting for RGB/SRGB
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for (int c = 0; c < PIXEL_SIZE; ++c) {
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// The alpha value should be equivalent before linear->SRGB
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float rgbAsSRGB = (c == 3) ? values[c] / 255.0f :
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linearToSRGB(values[c] / 255.0f);
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int expectedValue = rgbAsSRGB * 255.0f + 0.5f;
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int actualValue = mLockedBuffer.data[middleOffset + c];
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ASSERT_PRED2(withinTolerance, expectedValue, actualValue);
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}
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|
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// mLockedBuffer is unlocked in TearDown so we can copy data from it to
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// the debug surface if necessary
|
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}
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} // namespace android
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