Implement transform/clip support for Android WebView.

cc/output/software_renderer.cc

 // Copyright 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 "cc/output/software_renderer.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/base/math_util.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
@@ skipping 35 matching lines @@
     RendererClient* client,
     OutputSurface* output_surface,
     ResourceProvider* resource_provider) {
   return make_scoped_ptr(
       new SoftwareRenderer(client, output_surface, resource_provider));
 }
 
 SoftwareRenderer::SoftwareRenderer(RendererClient* client,
                                    OutputSurface* output_surface,
                                    ResourceProvider* resource_provider)
-  : DirectRenderer(client, resource_provider),
+  : DirectRenderer(client, output_surface, resource_provider),
     visible_(true),
     is_scissor_enabled_(false),
     is_viewport_changed_(true),
-    output_surface_(output_surface),
     output_device_(output_surface->software_device()),
     current_canvas_(NULL) {
   if (resource_provider_) {
     capabilities_.max_texture_size = resource_provider_->max_texture_size();
     capabilities_.best_texture_format =
         resource_provider_->best_texture_format();
   }
   capabilities_.using_set_visibility = true;
   // The updater can access bitmaps while the SoftwareRenderer is using them.
   capabilities_.allow_partial_texture_updates = true;
@@ skipping 10 matching lines @@
 }
 
 void SoftwareRenderer::ViewportChanged() {
   is_viewport_changed_ = true;
 }
 
 void SoftwareRenderer::BeginDrawingFrame(DrawingFrame* frame) {
   TRACE_EVENT0("cc", "SoftwareRenderer::BeginDrawingFrame");
   if (is_viewport_changed_) {
     is_viewport_changed_ = false;
-    output_device_->Resize(ViewportSize());
+    output_device_->Resize(client_->DeviceViewport().size());
   }
   root_canvas_ = output_device_->BeginPaint(
       gfx::ToEnclosingRect(frame->root_damage_rect));
 }
 
 void SoftwareRenderer::FinishDrawingFrame(DrawingFrame* frame) {
   TRACE_EVENT0("cc", "SoftwareRenderer::FinishDrawingFrame");
   current_framebuffer_lock_.reset();
   current_canvas_ = NULL;
   root_canvas_ = NULL;
@@ skipping 37 matching lines @@
 void SoftwareRenderer::Finish() {}
 
 void SoftwareRenderer::BindFramebufferToOutputSurface(DrawingFrame* frame) {
   current_framebuffer_lock_.reset();
   current_canvas_ = root_canvas_;
 }
 
 bool SoftwareRenderer::BindFramebufferToTexture(
     DrawingFrame* frame,
     const ScopedResource* texture,
-    gfx::Rect framebuffer_rect) {
+    gfx::Rect target_rect) {
   current_framebuffer_lock_.reset();
   current_framebuffer_lock_ = make_scoped_ptr(
       new ResourceProvider::ScopedWriteLockSoftware(
           resource_provider_, texture->id()));
   current_canvas_ = current_framebuffer_lock_->sk_canvas();
-  InitializeMatrices(frame, framebuffer_rect, false);
-  SetDrawViewportSize(framebuffer_rect.size());
-
+  InitializeViewport(frame,
+                     target_rect,
+                     gfx::Rect(target_rect.size()),
+                     target_rect.size(),
+                     false);
   return true;
 }
 
 void SoftwareRenderer::SetScissorTestRect(gfx::Rect scissor_rect) {
   is_scissor_enabled_ = true;
   scissor_rect_ = scissor_rect;
   SetClipRect(scissor_rect);
 }
 
 void SoftwareRenderer::SetClipRect(gfx::Rect rect) {
@@ skipping 18 matching lines @@
     ClearCanvas(SkColorSetARGB(0, 0, 0, 0));
   } else {
 #ifndef NDEBUG
     // On DEBUG builds, opaque render passes are cleared to blue
     // to easily see regions that were not drawn on the screen.
     ClearCanvas(SkColorSetARGB(255, 0, 0, 255));
 #endif
   }
 }
 
-void SoftwareRenderer::SetDrawViewportSize(gfx::Size viewport_size) {}
+void SoftwareRenderer::SetDrawViewport(gfx::Rect window_space_viewport) {}
 
 bool SoftwareRenderer::IsSoftwareResource(
     ResourceProvider::ResourceId resource_id) const {
   switch (resource_provider_->GetResourceType(resource_id)) {
     case ResourceProvider::GLTexture:
       return false;
     case ResourceProvider::Bitmap:
       return true;
   }
 
@@ skipping 223 matching lines @@
   current_paint_.setColor(SK_ColorMAGENTA);
 #endif
   current_paint_.setAlpha(quad->opacity() * 255);
   current_canvas_->drawRect(gfx::RectFToSkRect(QuadVertexRect()),
                             current_paint_);
 }
 
 void SoftwareRenderer::CopyCurrentRenderPassToBitmap(
     DrawingFrame* frame,
     scoped_ptr<CopyOutputRequest> request) {
-  gfx::Size render_pass_size = frame->current_render_pass->output_rect.size();
-
   scoped_ptr<SkBitmap> bitmap(new SkBitmap);
   bitmap->setConfig(SkBitmap::kARGB_8888_Config,
-                    render_pass_size.width(),
-                    render_pass_size.height());
-  current_canvas_->readPixels(bitmap.get(), 0, 0);
+                    current_viewport_rect_.width(),
+                    current_viewport_rect_.height());
+  current_canvas_->readPixels(
+      bitmap.get(), current_viewport_rect_.x(), current_viewport_rect_.y());
 
   request->SendBitmapResult(bitmap.Pass());
 }
 
 void SoftwareRenderer::GetFramebufferPixels(void* pixels, gfx::Rect rect) {
   TRACE_EVENT0("cc", "SoftwareRenderer::GetFramebufferPixels");
   SkBitmap subset_bitmap;
+  rect += current_viewport_rect_.OffsetFromOrigin();
   output_device_->CopyToBitmap(rect, &subset_bitmap);
   subset_bitmap.copyPixelsTo(pixels,
                              4 * rect.width() * rect.height(),
                              4 * rect.width());
 }
 
 void SoftwareRenderer::SetVisible(bool visible) {
   if (visible_ == visible)
     return;
   visible_ = visible;
 }
 
 }  // namespace cc