Index: ui/gl/gl_helper.cc |
diff --git a/ui/gl/gl_helper.cc b/ui/gl/gl_helper.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d3caceee2f7942c286ba4a2700826eefd7498528 |
--- /dev/null |
+++ b/ui/gl/gl_helper.cc |
@@ -0,0 +1,71 @@ |
+// Copyright 2015 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "ui/gl/gl_helper.h" |
+ |
+#include <string> |
+ |
+#include "base/logging.h" |
+ |
+namespace gfx { |
+ |
+// static |
+GLuint GLHelper::CompileShader(GLenum type, const char* src) { |
+ GLuint shader = glCreateShader(type); |
+ // Load the shader source. |
+ glShaderSource(shader, 1, &src, nullptr); |
+ // Compile the shader. |
+ glCompileShader(shader); |
+ return shader; |
+} |
+ |
+// static |
+GLuint GLHelper::LoadShader(GLenum type, const char* src) { |
+ GLuint shader = CompileShader(type, src); |
+ |
+ // Check the compile status. |
+ GLint value = 0; |
+ glGetShaderiv(shader, GL_COMPILE_STATUS, &value); |
+ if (!value) { |
+ char buffer[1024]; |
+ GLsizei length = 0; |
+ glGetShaderInfoLog(shader, sizeof(buffer), &length, buffer); |
+ std::string log(buffer, length); |
+ DCHECK_EQ(1, value) << "Error compiling shader: " << log; |
+ glDeleteShader(shader); |
+ shader = 0; |
+ } |
+ return shader; |
+} |
+ |
+// static |
+GLuint GLHelper::LinkProgram(GLuint vertex_shader, GLuint fragment_shader) { |
+ // Create the program object. |
+ GLuint program = glCreateProgram(); |
+ glAttachShader(program, vertex_shader); |
+ glAttachShader(program, fragment_shader); |
+ // Link the program. |
+ glLinkProgram(program); |
+ return program; |
+} |
+ |
+// static |
+GLuint GLHelper::SetupProgram(GLuint vertex_shader, GLuint fragment_shader) { |
+ GLuint program = LinkProgram(vertex_shader, fragment_shader); |
+ // Check the link status. |
+ GLint linked = 0; |
+ glGetProgramiv(program, GL_LINK_STATUS, &linked); |
+ if (!linked) { |
+ char buffer[1024]; |
+ GLsizei length = 0; |
+ glGetProgramInfoLog(program, sizeof(buffer), &length, buffer); |
+ std::string log(buffer, length); |
+ DCHECK_EQ(1, linked) << "Error linking program: " << log; |
+ glDeleteProgram(program); |
+ program = 0; |
+ } |
+ return program; |
+} |
+ |
+} // namespace gfx |