Very basic Android browser-side compositing support.

content/shell/android/draw_context.cc

Index: content/shell/android/draw_context.cc
diff --git a/content/shell/android/draw_context.cc b/content/shell/android/draw_context.cc
deleted file mode 100644
index d5a8fc7bfaa95eecd098854a85ff8983fec4f776..0000000000000000000000000000000000000000
--- a/content/shell/android/draw_context.cc
+++ /dev/null
@@ -1,117 +0,0 @@
-// Copyright (c) 2012 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 "content/shell/android/draw_context.h"
-
-#include "base/logging.h"
-#include "content/public/browser/android/graphics_context.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebGraphicsContext3D.h"
-
-namespace {
-
-static const char g_vertex_shader[] =
-  "attribute vec4 a_Position;"
-  "attribute vec2 a_texCoord;"
-  "varying vec2 v_texCoord;"
-  "void main() {"
-  "  gl_Position = a_Position;"
-  "  v_texCoord = a_texCoord;"
-  "}";
-
-// Minimal texture mapping pixel shader.
-static const char g_fragment_shader[] =
-  "precision mediump float;"
-  "varying vec2 v_texCoord;"
-  "uniform sampler2D s_texture;"
-  "void main() {"
-  "  gl_FragColor = texture2D(s_texture, v_texCoord);"
-  "}";
-
-}  // anonymous namespace
-
-namespace content {
-
-DrawContext::DrawContext(ANativeWindow* window)
-    : program_(GL_ZERO),
-      vertex_shader_(0),
-      fragment_shader_(0),
-      texture_uniform_(GL_ZERO),
-      vertex_buffer_(GL_ZERO),
-      context_(content::GraphicsContext::CreateForUI(window)) {
-  const GLfloat attribs[] = {
-    -1.0f, -1.0f,
-    1.0f, -1.0f,
-    -1.0f, 1.0f,
-    1.0f, 1.0f,
-    0.0f, 0.0f,
-    1.0f, 0.0f,
-    0.0f, 1.0f,
-    1.0f, 1.0f };
-  WebKit::WebGraphicsContext3D* context3D = context_->GetContext3D();
-  vertex_buffer_ = context3D->createBuffer();
-  context3D->bindBuffer(GL_ARRAY_BUFFER, vertex_buffer_);
-  context3D->bufferData(GL_ARRAY_BUFFER, 16 * sizeof(GLfloat), attribs,
-                        GL_STATIC_DRAW);
-
-  vertex_shader_ = context3D->createShader(GL_VERTEX_SHADER);
-  context3D->shaderSource(vertex_shader_, g_vertex_shader);
-  context3D->compileShader(vertex_shader_);
-
-  fragment_shader_ = context3D->createShader(GL_FRAGMENT_SHADER);
-  context3D->shaderSource(fragment_shader_, g_fragment_shader);
-  context3D->compileShader(fragment_shader_);
-
-  program_ = context3D->createProgram();
-  context3D->attachShader(program_, vertex_shader_);
-  context3D->attachShader(program_, fragment_shader_);
-  context3D->linkProgram(program_);
-
-  texture_uniform_ = context3D->getUniformLocation(program_, "s_texture");
-}
-
-DrawContext::~DrawContext() {
-  if (vertex_buffer_ != GL_ZERO)
-    context_->GetContext3D()->deleteBuffer(vertex_buffer_);
-  if (program_ != GL_ZERO)
-    context_->GetContext3D()->deleteProgram(program_);
-}
-
-uint32 DrawContext::Draw(int texture) {
-  DCHECK(program_ != GL_ZERO);
-  WebKit::WebGraphicsContext3D* context3D = context_->GetContext3D();
-
-  context3D->useProgram(program_);
-
-  context3D->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-  context3D->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-  context3D->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-  context3D->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-
-  context3D->uniform1i(texture_uniform_, 0);
-  context3D->activeTexture(GL_TEXTURE0);
-  context3D->bindTexture(GL_TEXTURE_2D, texture);
-
-  context3D->bindBuffer(GL_ARRAY_BUFFER, vertex_buffer_);
-  context3D->enableVertexAttribArray(0);
-  context3D->vertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
-  context3D->bindAttribLocation(program_, 0, "a_Position");
-  context3D->enableVertexAttribArray(1);
-  context3D->vertexAttribPointer(
-      1, 2, GL_FLOAT, GL_FALSE, 0, 8 * sizeof(GLfloat));
-  context3D->bindAttribLocation(program_, 1, "a_texCoord");
-
-  context3D->drawArrays(GL_TRIANGLE_STRIP, 0, 4);
-
-  context3D->prepareTexture();
-
-  return context_->InsertSyncPoint();
-}
-
-void DrawContext::Reshape(int width, int height) {
-  WebKit::WebGraphicsContext3D* context3D = context_->GetContext3D();
-  context3D->viewport(0, 0, width, height);
-  context3D->reshape(width, height);
-}
-
-}  // namespace content