wayland patch for inspection

ui/wayland/demos/util.cc

+// Copyright (c) 2011 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/wayland/demos/util.h"
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/gl/gl_bindings.h"
+
+namespace {
+
+void PrintFBOStatus(GLenum status) {
+  switch (status) {
+  case GL_FRAMEBUFFER_COMPLETE:
+    LOG(ERROR) << "Complete attachment";
+    break;
+  case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
+    LOG(ERROR) << "Incomplete attachment";
+    break;
+  case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
+    LOG(ERROR) << "Incomplete missing attachment";
+    break;
+  case GL_FRAMEBUFFER_UNSUPPORTED:
+    LOG(ERROR) << "Unsupported";
+    break;
+  }
+}
+
+}  // namespace
+
+namespace util {
+
+GLuint CompileShader(GLenum type, const GLchar* source) {
+  GLuint shader = glCreateShader(type);
+  if (!shader)
+    return 0;
+
+  glShaderSource(shader, 1, &source, 0);
+  glCompileShader(shader);
+
+  GLint compiled;
+  glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
+  if (!compiled) {
+    GLint info_len = 0;
+    glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &info_len);
+
+    if (info_len > 0) {
+//      scoped_array<char> info_log(new char[info_len]);
+//      glGetShaderInfoLog(shader, info_len, NULL, info_log.get());
+//      LOG(ERROR) << "Compile error: " <<  info_log.get();
+      return 0;
+    }
+  }
+  return shader;
+}
+
+// Create a FBO bound to the output texture as a color buffer.
+void CreateFBO(GLuint width, GLuint height, GLuint* fbo, GLuint color_texture) {
+  // Generate depth render buffer for FBO.
+  GLuint depth_buffer;
+
+  glGenRenderbuffersEXT(1, &depth_buffer);
+  glBindRenderbufferEXT(GL_RENDERBUFFER, depth_buffer);
+  glRenderbufferStorageEXT(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16,
+                           width, height);
+  glBindRenderbufferEXT(GL_RENDERBUFFER, 0);
+
+  // Generate the FBO.
+  glGenFramebuffersEXT(1, fbo);
+  glBindFramebufferEXT(GL_FRAMEBUFFER, *fbo);
+  glFramebufferTexture2DEXT(GL_FRAMEBUFFER,
+                            GL_COLOR_ATTACHMENT0,
+                            GL_TEXTURE_2D,
+                            color_texture,
+                            0);
+  glFramebufferRenderbufferEXT(GL_FRAMEBUFFER,
+                               GL_DEPTH_ATTACHMENT,
+                               GL_RENDERBUFFER,
+                               depth_buffer);
+
+  PrintFBOStatus(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER));
+  glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
+}
+
+}  // namespace util