cc: Convert non-const reference arguments to pointers.

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 77 matching lines @@
 SoftwareRenderer::~SoftwareRenderer() {}
 
 const RendererCapabilities& SoftwareRenderer::Capabilities() const {
   return capabilities_;
 }
 
 void SoftwareRenderer::ViewportChanged() {
   output_device_->Resize(ViewportSize());
 }
 
-void SoftwareRenderer::BeginDrawingFrame(DrawingFrame& frame) {
+void SoftwareRenderer::BeginDrawingFrame(DrawingFrame* frame) {
   TRACE_EVENT0("cc", "SoftwareRenderer::BeginDrawingFrame");
   root_canvas_ = output_device_->BeginPaint(
-      gfx::ToEnclosingRect(frame.root_damage_rect));
+      gfx::ToEnclosingRect(frame->root_damage_rect));
 }
 
-void SoftwareRenderer::FinishDrawingFrame(DrawingFrame& frame) {
+void SoftwareRenderer::FinishDrawingFrame(DrawingFrame* frame) {
   TRACE_EVENT0("cc", "SoftwareRenderer::FinishDrawingFrame");
   current_framebuffer_lock_.reset();
   current_canvas_ = NULL;
   root_canvas_ = NULL;
   if (Settings().compositor_frame_message) {
     compositor_frame_.metadata = client_->MakeCompositorFrameMetadata();
     output_device_->EndPaint(compositor_frame_.software_frame_data.get());
   } else {
     output_device_->EndPaint(NULL);
   }
@@ skipping 26 matching lines @@
   // rendering, but the underlying effect we want is to clear any existing
   // clipRect on the current SkCanvas. This is done by setting clipRect to
   // the viewport's dimensions.
   is_scissor_enabled_ = false;
   SkDevice* device = current_canvas_->getDevice();
   SetClipRect(gfx::Rect(device->width(), device->height()));
 }
 
 void SoftwareRenderer::Finish() {}
 
-void SoftwareRenderer::BindFramebufferToOutputSurface(DrawingFrame& frame) {
+void SoftwareRenderer::BindFramebufferToOutputSurface(DrawingFrame* frame) {
   current_framebuffer_lock_.reset();
   current_canvas_ = root_canvas_;
 }
 
 bool SoftwareRenderer::BindFramebufferToTexture(
-    DrawingFrame& frame,
+    DrawingFrame* frame,
     const ScopedResource* texture,
     gfx::Rect framebuffer_rect) {
   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());
 
   return true;
@@ skipping 15 matching lines @@
 
 void SoftwareRenderer::ClearCanvas(SkColor color) {
   // SkCanvas::clear doesn't respect the current clipping region
   // so we SkCanvas::drawColor instead if scissoring is active.
   if (is_scissor_enabled_)
     current_canvas_->drawColor(color, SkXfermode::kSrc_Mode);
   else
     current_canvas_->clear(color);
 }
 
-void SoftwareRenderer::ClearFramebuffer(DrawingFrame& frame) {
-  if (frame.current_render_pass->has_transparent_background) {
+void SoftwareRenderer::ClearFramebuffer(DrawingFrame* frame) {
+  if (frame->current_render_pass->has_transparent_background) {
     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) {}
 
 bool SoftwareRenderer::IsSoftwareResource(
     ResourceProvider::ResourceId resource_id) const {
   switch (resource_provider_->GetResourceType(resource_id)) {
     case ResourceProvider::GLTexture:
       return false;
     case ResourceProvider::Bitmap:
       return true;
   }
 
   LOG(FATAL) << "Invalid resource type.";
   return false;
 }
 
-void SoftwareRenderer::DoDrawQuad(DrawingFrame& frame, const DrawQuad* quad) {
+void SoftwareRenderer::DoDrawQuad(DrawingFrame* frame, const DrawQuad* quad) {
   TRACE_EVENT0("cc", "SoftwareRenderer::DoDrawQuad");
   gfx::Transform quad_rect_matrix;
   QuadRectTransform(&quad_rect_matrix, quad->quadTransform(), quad->rect);
   gfx::Transform contents_device_transform =
-      frame.window_matrix * frame.projection_matrix * quad_rect_matrix;
+      frame->window_matrix * frame->projection_matrix * quad_rect_matrix;
   contents_device_transform.FlattenTo2d();
   SkMatrix sk_device_matrix;
   ToSkMatrix(&sk_device_matrix, contents_device_transform);
   current_canvas_->setMatrix(sk_device_matrix);
 
   current_paint_.reset();
   if (!IsScaleAndTranslate(sk_device_matrix)) {
     current_paint_.setAntiAlias(true);
     current_paint_.setFilterBitmap(true);
   }
@@ skipping 22 matching lines @@
       DrawRenderPassQuad(frame, RenderPassDrawQuad::MaterialCast(quad));
       break;
     default:
       DrawUnsupportedQuad(frame, quad);
       break;
   }
 
   current_canvas_->resetMatrix();
 }
 
-void SoftwareRenderer::DrawDebugBorderQuad(const DrawingFrame& frame,
+void SoftwareRenderer::DrawDebugBorderQuad(const DrawingFrame* frame,
                                            const DebugBorderDrawQuad* quad) {
   // We need to apply the matrix manually to have pixel-sized stroke width.
   SkPoint vertices[4];
   gfx::RectFToSkRect(QuadVertexRect()).toQuad(vertices);
   SkPoint transformed_vertices[4];
   current_canvas_->getTotalMatrix().mapPoints(transformed_vertices,
                                               vertices,
                                               4);
   current_canvas_->resetMatrix();
 
   current_paint_.setColor(quad->color);
   current_paint_.setAlpha(quad->opacity() * SkColorGetA(quad->color));
   current_paint_.setStyle(SkPaint::kStroke_Style);
   current_paint_.setStrokeWidth(quad->width);
   current_canvas_->drawPoints(SkCanvas::kPolygon_PointMode,
                               4, transformed_vertices, current_paint_);
 }
 
-void SoftwareRenderer::DrawSolidColorQuad(const DrawingFrame& frame,
+void SoftwareRenderer::DrawSolidColorQuad(const DrawingFrame* frame,
                                           const SolidColorDrawQuad* quad) {
   current_paint_.setColor(quad->color);
   current_paint_.setAlpha(quad->opacity() * SkColorGetA(quad->color));
   current_canvas_->drawRect(gfx::RectFToSkRect(QuadVertexRect()),
                             current_paint_);
 }
 
-void SoftwareRenderer::DrawTextureQuad(const DrawingFrame& frame,
+void SoftwareRenderer::DrawTextureQuad(const DrawingFrame* frame,
                                        const TextureDrawQuad* quad) {
   if (!IsSoftwareResource(quad->resource_id)) {
     DrawUnsupportedQuad(frame, quad);
     return;
   }
 
   // FIXME: Add support for non-premultiplied alpha.
   ResourceProvider::ScopedReadLockSoftware lock(resource_provider_,
                                                 quad->resource_id);
   const SkBitmap* bitmap = lock.sk_bitmap();
   gfx::RectF uv_rect = gfx::ScaleRect(gfx::BoundingRect(quad->uv_top_left,
                                                         quad->uv_bottom_right),
                                       bitmap->width(),
                                       bitmap->height());
   SkRect sk_uv_rect = gfx::RectFToSkRect(uv_rect);
   if (quad->flipped)
     current_canvas_->scale(1, -1);
   current_canvas_->drawBitmapRectToRect(*bitmap, &sk_uv_rect,
                                         gfx::RectFToSkRect(QuadVertexRect()),
                                         &current_paint_);
 }
 
-void SoftwareRenderer::DrawTileQuad(const DrawingFrame& frame,
+void SoftwareRenderer::DrawTileQuad(const DrawingFrame* frame,
                                     const TileDrawQuad* quad) {
   DCHECK(IsSoftwareResource(quad->resource_id));
   ResourceProvider::ScopedReadLockSoftware lock(resource_provider_,
                                                 quad->resource_id);
 
   SkRect uv_rect = gfx::RectFToSkRect(quad->tex_coord_rect);
   current_paint_.setFilterBitmap(true);
   current_canvas_->drawBitmapRectToRect(*lock.sk_bitmap(), &uv_rect,
                                         gfx::RectFToSkRect(QuadVertexRect()),
                                         &current_paint_);
 }
 
-void SoftwareRenderer::DrawRenderPassQuad(const DrawingFrame& frame,
+void SoftwareRenderer::DrawRenderPassQuad(const DrawingFrame* frame,
                                           const RenderPassDrawQuad* quad) {
   CachedResource* content_texture =
       render_pass_textures_.get(quad->render_pass_id);
   if (!content_texture || !content_texture->id())
     return;
 
   DCHECK(IsSoftwareResource(content_texture->id()));
   ResourceProvider::ScopedReadLockSoftware lock(resource_provider_,
                                                 content_texture->id());
 
@@ skipping 45 matching lines @@
     mask_rasterizer->addLayer(mask_paint);
 
     current_paint_.setRasterizer(mask_rasterizer.get());
     current_canvas_->drawRect(dest_rect, current_paint_);
   } else {
     // FIXME: Apply background filters and blend with content
     current_canvas_->drawRect(dest_rect, current_paint_);
   }
 }
 
-void SoftwareRenderer::DrawUnsupportedQuad(const DrawingFrame& frame,
+void SoftwareRenderer::DrawUnsupportedQuad(const DrawingFrame* frame,
                                            const DrawQuad* quad) {
 #ifndef NDEBUG
   current_paint_.setColor(SK_ColorWHITE);
 #else
   current_paint_.setColor(SK_ColorMAGENTA);
 #endif
   current_paint_.setAlpha(quad->opacity() * 255);
   current_canvas_->drawRect(gfx::RectFToSkRect(QuadVertexRect()),
                             current_paint_);
 }
 
 void SoftwareRenderer::GetFramebufferPixels(void* pixels, gfx::Rect rect) {
   TRACE_EVENT0("cc", "SoftwareRenderer::GetFramebufferPixels");
   SkBitmap subset_bitmap;
   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