fadb61567c
Now Chrome runs on Native GLES or ANGLE, so it's never true. TEST=bots Bug: 347368403 Change-Id: I6739bd89b1a9facc975985fcfbfa18d39a2f5b34 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5634390 Commit-Queue: Zhenyao Mo <zmo@chromium.org> Commit-Queue: Vasiliy Telezhnikov <vasilyt@chromium.org> Auto-Submit: Zhenyao Mo <zmo@chromium.org> Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org> Cr-Commit-Position: refs/heads/main@{#1316030}
99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
// Copyright 2015 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "ui/gl/gl_helper.h"
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#include <string>
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#include "base/check_op.h"
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#include "ui/gl/gl_context.h"
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#include "ui/gl/scoped_binders.h"
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namespace gl {
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// static
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GLuint GLHelper::CompileShader(GLenum type, const char* src) {
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GLuint shader = glCreateShader(type);
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// Load the shader source.
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glShaderSource(shader, 1, &src, nullptr);
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// Compile the shader.
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glCompileShader(shader);
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return shader;
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}
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// static
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GLuint GLHelper::LoadShader(GLenum type, const char* src) {
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GLuint shader = CompileShader(type, src);
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// Check the compile status.
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GLint value = 0;
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glGetShaderiv(shader, GL_COMPILE_STATUS, &value);
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if (!value) {
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char buffer[1024];
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GLsizei length = 0;
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glGetShaderInfoLog(shader, sizeof(buffer), &length, buffer);
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std::string log(buffer, length);
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DCHECK_EQ(1, value) << "Error compiling shader: " << log;
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glDeleteShader(shader);
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shader = 0;
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}
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return shader;
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}
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// static
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GLuint GLHelper::LinkProgram(GLuint vertex_shader, GLuint fragment_shader) {
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// Create the program object.
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GLuint program = glCreateProgram();
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glAttachShader(program, vertex_shader);
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glAttachShader(program, fragment_shader);
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// Link the program.
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glLinkProgram(program);
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return program;
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}
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// static
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GLuint GLHelper::SetupProgram(GLuint vertex_shader, GLuint fragment_shader) {
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GLuint program = LinkProgram(vertex_shader, fragment_shader);
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// Check the link status.
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GLint linked = 0;
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glGetProgramiv(program, GL_LINK_STATUS, &linked);
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if (!linked) {
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char buffer[1024];
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GLsizei length = 0;
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glGetProgramInfoLog(program, sizeof(buffer), &length, buffer);
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std::string log(buffer, length);
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DCHECK_EQ(1, linked) << "Error linking program: " << log;
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glDeleteProgram(program);
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program = 0;
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}
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return program;
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}
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// static
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GLuint GLHelper::SetupQuadVertexBuffer() {
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GLuint vertex_buffer = 0;
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glGenBuffersARB(1, &vertex_buffer);
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ScopedBufferBinder buffer_binder(GL_ARRAY_BUFFER, vertex_buffer);
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GLfloat data[] = {-1.f, -1.f, 1.f, -1.f, -1.f, 1.f, 1.f, 1.f};
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glBufferData(GL_ARRAY_BUFFER, sizeof(data), data, GL_STATIC_DRAW);
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return vertex_buffer;
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}
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// static
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void GLHelper::DrawQuad(GLuint vertex_buffer) {
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ScopedBufferBinder buffer_binder(GL_ARRAY_BUFFER, vertex_buffer);
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ScopedVertexAttribArray vertex_attrib_array(0, 2, GL_FLOAT, GL_FALSE,
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sizeof(GLfloat) * 2, 0);
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ScopedCapability disable_blending(GL_BLEND, GL_FALSE);
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ScopedCapability disable_culling(GL_CULL_FACE, GL_FALSE);
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ScopedCapability disable_dithering(GL_DITHER, GL_FALSE);
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ScopedCapability disable_depth_test(GL_DEPTH_TEST, GL_FALSE);
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ScopedCapability disable_scissor_test(GL_SCISSOR_TEST, GL_FALSE);
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ScopedColorMask color_mask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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}
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} // namespace gl
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