Revert of android: Migrate old content readback to use async readback (and delegated renderer)

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index 7fe5fed2651507d79b2ecf5e8e64086440466ca3..b85de07a858272d6ce8e1a523530c228c6e47a45 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -38,7 +38,6 @@
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
-#include "third_party/skia/include/core/SkMallocPixelRef.h"
 #include "ui/base/android/window_android.h"
 #include "ui/gfx/android/device_display_info.h"
 #include "ui/gfx/android/java_bitmap.h"
@@ -89,46 +88,6 @@
 
     OutputSurface::SwapBuffers(frame);
   }
-};
-
-class TransientUIResource : public cc::ScopedUIResource {
- public:
-  static scoped_ptr<TransientUIResource> Create(
-      cc::LayerTreeHost* host,
-      const cc::UIResourceBitmap& bitmap) {
-    return make_scoped_ptr(new TransientUIResource(host, bitmap));
-  }
-
-  virtual cc::UIResourceBitmap GetBitmap(cc::UIResourceId uid,
-                                         bool resource_lost) OVERRIDE {
-    if (!retrieved_) {
-      cc::UIResourceBitmap old_bitmap(bitmap_);
-
-      // Return a place holder for all following calls to GetBitmap.
-      SkBitmap tiny_bitmap;
-      SkCanvas canvas(tiny_bitmap);
-      tiny_bitmap.setConfig(
-          SkBitmap::kARGB_8888_Config, 1, 1, 0, kOpaque_SkAlphaType);
-      tiny_bitmap.allocPixels();
-      canvas.drawColor(SK_ColorWHITE);
-      tiny_bitmap.setImmutable();
-
-      // Release our reference of the true bitmap.
-      bitmap_ = cc::UIResourceBitmap(tiny_bitmap);
-
-      retrieved_ = true;
-      return old_bitmap;
-    }
-    return bitmap_;
-  }
-
- protected:
-  TransientUIResource(cc::LayerTreeHost* host,
-                      const cc::UIResourceBitmap& bitmap)
-      : cc::ScopedUIResource(host, bitmap), retrieved_(false) {}
-
- private:
-  bool retrieved_;
 };
 
 static bool g_initialized = false;
@@ -307,60 +266,90 @@
     return false;
 }
 
-cc::UIResourceId CompositorImpl::GenerateUIResourceFromUIResourceBitmap(
-    const cc::UIResourceBitmap& bitmap,
-    bool is_transient) {
+cc::UIResourceId CompositorImpl::GenerateUIResource(
+    const cc::UIResourceBitmap& bitmap) {
   if (!host_)
     return 0;
-
-  cc::UIResourceId id = 0;
-  scoped_ptr<cc::UIResourceClient> resource;
-  if (is_transient) {
-    scoped_ptr<TransientUIResource> transient_resource =
-        TransientUIResource::Create(host_.get(), bitmap);
-    id = transient_resource->id();
-    resource = transient_resource.Pass();
-  } else {
-    scoped_ptr<cc::ScopedUIResource> scoped_resource =
-        cc::ScopedUIResource::Create(host_.get(), bitmap);
-    id = scoped_resource->id();
-    resource = scoped_resource.Pass();
-  }
-
-  ui_resource_map_.set(id, resource.Pass());
+  scoped_ptr<cc::ScopedUIResource> ui_resource =
+      cc::ScopedUIResource::Create(host_.get(), bitmap);
+  cc::UIResourceId id = ui_resource->id();
+  ui_resource_map_.set(id, ui_resource.Pass());
   return id;
-}
-
-cc::UIResourceId CompositorImpl::GenerateUIResource(const SkBitmap& bitmap,
-                                                    bool is_transient) {
-  return GenerateUIResourceFromUIResourceBitmap(cc::UIResourceBitmap(bitmap),
-                                                is_transient);
-}
-
-cc::UIResourceId CompositorImpl::GenerateCompressedUIResource(
-    const gfx::Size& size,
-    void* pixels,
-    bool is_transient) {
-  DCHECK_LT(0, size.width());
-  DCHECK_LT(0, size.height());
-  DCHECK_EQ(0, size.width() % 4);
-  DCHECK_EQ(0, size.height() % 4);
-
-  size_t data_size = size.width() * size.height() / 2;
-  SkImageInfo info = {size.width(), size.height() / 2, kAlpha_8_SkColorType,
-                      kPremul_SkAlphaType};
-  skia::RefPtr<SkMallocPixelRef> etc1_pixel_ref =
-      skia::AdoptRef(SkMallocPixelRef::NewAllocate(info, 0, 0));
-  memcpy(etc1_pixel_ref->getAddr(), pixels, data_size);
-  etc1_pixel_ref->setImmutable();
-  return GenerateUIResourceFromUIResourceBitmap(
-      cc::UIResourceBitmap(etc1_pixel_ref, size), is_transient);
 }
 
 void CompositorImpl::DeleteUIResource(cc::UIResourceId resource_id) {
   UIResourceMap::iterator it = ui_resource_map_.find(resource_id);
   if (it != ui_resource_map_.end())
     ui_resource_map_.erase(it);
+}
+
+GLuint CompositorImpl::GenerateTexture(gfx::JavaBitmap& bitmap) {
+  unsigned int texture_id = BuildBasicTexture();
+  gpu::gles2::GLES2Interface* gl =
+      ImageTransportFactoryAndroid::GetInstance()->GetContextGL();
+  if (texture_id == 0u)
+    return 0u;
+  GLenum format = GetGLFormatForBitmap(bitmap);
+  GLenum type = GetGLTypeForBitmap(bitmap);
+
+  gl->TexImage2D(GL_TEXTURE_2D,
+                 0,
+                 format,
+                 bitmap.size().width(),
+                 bitmap.size().height(),
+                 0,
+                 format,
+                 type,
+                 bitmap.pixels());
+  gl->ShallowFlushCHROMIUM();
+  return texture_id;
+}
+
+GLuint CompositorImpl::GenerateCompressedTexture(gfx::Size& size,
+                                                 int data_size,
+                                                 void* data) {
+  unsigned int texture_id = BuildBasicTexture();
+  gpu::gles2::GLES2Interface* gl =
+      ImageTransportFactoryAndroid::GetInstance()->GetContextGL();
+  if (texture_id == 0u)
+    return 0u;
+  gl->CompressedTexImage2D(GL_TEXTURE_2D,
+                           0,
+                           GL_ETC1_RGB8_OES,
+                           size.width(),
+                           size.height(),
+                           0,
+                           data_size,
+                           data);
+  gl->ShallowFlushCHROMIUM();
+  return texture_id;
+}
+
+void CompositorImpl::DeleteTexture(GLuint texture_id) {
+  gpu::gles2::GLES2Interface* gl =
+      ImageTransportFactoryAndroid::GetInstance()->GetContextGL();
+  gl->DeleteTextures(1, &texture_id);
+  gl->ShallowFlushCHROMIUM();
+}
+
+bool CompositorImpl::CopyTextureToBitmap(GLuint texture_id,
+                                         gfx::JavaBitmap& bitmap) {
+  return CopyTextureToBitmap(texture_id, gfx::Rect(bitmap.size()), bitmap);
+}
+
+bool CompositorImpl::CopyTextureToBitmap(GLuint texture_id,
+                                         const gfx::Rect& sub_rect,
+                                         gfx::JavaBitmap& bitmap) {
+  // The sub_rect should match the bitmap size.
+  DCHECK(bitmap.size() == sub_rect.size());
+  if (bitmap.size() != sub_rect.size() || texture_id == 0) return false;
+
+  GLHelper* helper = ImageTransportFactoryAndroid::GetInstance()->GetGLHelper();
+  helper->ReadbackTextureSync(texture_id,
+                              sub_rect,
+                              static_cast<unsigned char*> (bitmap.pixels()),
+                              SkBitmap::kARGB_8888_Config);
+  return true;
 }
 
 static scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
@@ -454,6 +443,53 @@
   client_->OnSwapBuffersCompleted();
 }
 
+GLuint CompositorImpl::BuildBasicTexture() {
+  gpu::gles2::GLES2Interface* gl =
+      ImageTransportFactoryAndroid::GetInstance()->GetContextGL();
+  GLuint texture_id = 0u;
+  gl->GenTextures(1, &texture_id);
+  gl->BindTexture(GL_TEXTURE_2D, texture_id);
+  gl->TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+  gl->TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  gl->TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+  gl->TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+  return texture_id;
+}
+
+GLenum CompositorImpl::GetGLFormatForBitmap(gfx::JavaBitmap& bitmap) {
+  switch (bitmap.format()) {
+    case ANDROID_BITMAP_FORMAT_A_8:
+      return GL_ALPHA;
+      break;
+    case ANDROID_BITMAP_FORMAT_RGBA_4444:
+      return GL_RGBA;
+      break;
+    case ANDROID_BITMAP_FORMAT_RGBA_8888:
+      return GL_RGBA;
+      break;
+    case ANDROID_BITMAP_FORMAT_RGB_565:
+    default:
+      return GL_RGB;
+  }
+}
+
+GLenum CompositorImpl::GetGLTypeForBitmap(gfx::JavaBitmap& bitmap) {
+  switch (bitmap.format()) {
+    case ANDROID_BITMAP_FORMAT_A_8:
+      return GL_UNSIGNED_BYTE;
+      break;
+    case ANDROID_BITMAP_FORMAT_RGBA_4444:
+      return GL_UNSIGNED_SHORT_4_4_4_4;
+      break;
+    case ANDROID_BITMAP_FORMAT_RGBA_8888:
+      return GL_UNSIGNED_BYTE;
+      break;
+    case ANDROID_BITMAP_FORMAT_RGB_565:
+    default:
+      return GL_UNSIGNED_SHORT_5_6_5;
+  }
+}
+
 void CompositorImpl::DidCommit() {
   root_window_->OnCompositingDidCommit();
 }