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// Copyright (C) 2018 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 "GLSnapshotTestStateUtils.h"
#include "GLSnapshotTesting.h"
#include "OpenglCodecCommon/glUtils.h"
#include <gtest/gtest.h>
#include <GLES2/gl2.h>
#include <GLES3/gl31.h>
namespace emugl {
GLuint createBuffer(const GLESv2Dispatch* gl, GlBufferData data) {
// We bind to GL_ARRAY_BUFFER in order to set up buffer data,
// so let's hold on to what the old binding was so we can restore it
GLuint currentArrayBuffer;
gl->glGetIntegerv(GL_ARRAY_BUFFER_BINDING, (GLint*)¤tArrayBuffer);
EXPECT_EQ(GL_NO_ERROR, gl->glGetError());
GLuint name;
gl->glGenBuffers(1, &name);
EXPECT_EQ(GL_NO_ERROR, gl->glGetError());
gl->glBindBuffer(GL_ARRAY_BUFFER, name);
gl->glBufferData(GL_ARRAY_BUFFER, data.size, data.bytes, data.usage);
// Restore the old binding
gl->glBindBuffer(GL_ARRAY_BUFFER, currentArrayBuffer);
EXPECT_EQ(GL_NO_ERROR, gl->glGetError());
return name;
};
GLuint loadAndCompileShader(const GLESv2Dispatch* gl,
GLenum shaderType,
const char* src) {
GLuint shader = gl->glCreateShader(shaderType);
gl->glShaderSource(shader, 1, (const GLchar* const*)&src, nullptr);
gl->glCompileShader(shader);
GLint compileStatus;
gl->glGetShaderiv(shader, GL_COMPILE_STATUS, &compileStatus);
EXPECT_EQ(GL_TRUE, compileStatus);
if (compileStatus != GL_TRUE) {
GLsizei infoLogLength;
gl->glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLogLength);
std::vector<char> infoLog;
infoLog.resize(infoLogLength);
gl->glGetShaderInfoLog(shader, infoLogLength, nullptr, &infoLog[0]);
fprintf(stderr, "%s: fail to compile. infolog %s\n", __func__,
&infoLog[0]);
}
return shader;
}
std::vector<GLubyte> getTextureImageData(const GLESv2Dispatch* gl,
GLuint texture,
GLenum target,
GLint level,
GLsizei width,
GLsizei height,
GLenum format,
GLenum type) {
std::vector<GLubyte> out = {};
out.resize(width * height *
glUtilsPixelBitSize(GL_RGBA /* format */,
GL_UNSIGNED_BYTE /* type */) / 8);
// switch to auxiliary framebuffer
GLint oldFramebuffer;
gl->glGetIntegerv(GL_FRAMEBUFFER_BINDING, &oldFramebuffer);
GLuint auxFramebuffer;
gl->glGenFramebuffers(1, &auxFramebuffer);
gl->glBindFramebuffer(GL_FRAMEBUFFER, auxFramebuffer);
EXPECT_EQ(GL_NO_ERROR, gl->glGetError());
gl->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target,
texture, level);
EXPECT_EQ(GL_NO_ERROR, gl->glGetError());
gl->glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE,
out.data()); // TODO(benzene): flexible format/type?
// seems like RGBA/UNSIGNED_BYTE is the only
// guaranteed supported format+type
EXPECT_EQ(GL_NO_ERROR, gl->glGetError());
// restore old framebuffer
gl->glBindFramebuffer(GL_FRAMEBUFFER, oldFramebuffer);
gl->glDeleteFramebuffers(1, &auxFramebuffer);
EXPECT_EQ(GL_NO_ERROR, gl->glGetError());
return out;
}
} // namespace emugl
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