1 // Copyright 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "cc/resources/content_layer_updater.h" 6 7 #include "base/debug/trace_event.h" 8 #include "base/time/time.h" 9 #include "cc/debug/rendering_stats_instrumentation.h" 10 #include "cc/resources/layer_painter.h" 11 #include "third_party/skia/include/core/SkCanvas.h" 12 #include "third_party/skia/include/core/SkPaint.h" 13 #include "third_party/skia/include/core/SkRect.h" 14 #include "third_party/skia/include/core/SkScalar.h" 15 #include "ui/gfx/rect_conversions.h" 16 #include "ui/gfx/rect_f.h" 17 18 namespace cc { 19 20 ContentLayerUpdater::ContentLayerUpdater( 21 scoped_ptr<LayerPainter> painter, 22 RenderingStatsInstrumentation* stats_instrumentation, 23 int layer_id) 24 : rendering_stats_instrumentation_(stats_instrumentation), 25 layer_id_(layer_id), 26 painter_(painter.Pass()) {} 27 28 ContentLayerUpdater::~ContentLayerUpdater() {} 29 30 void ContentLayerUpdater::set_rendering_stats_instrumentation( 31 RenderingStatsInstrumentation* rsi) { 32 rendering_stats_instrumentation_ = rsi; 33 } 34 35 void ContentLayerUpdater::PaintContents(SkCanvas* canvas, 36 gfx::Rect content_rect, 37 float contents_width_scale, 38 float contents_height_scale, 39 gfx::Rect* resulting_opaque_rect) { 40 TRACE_EVENT0("cc", "ContentLayerUpdater::PaintContents"); 41 canvas->save(); 42 canvas->translate(SkFloatToScalar(-content_rect.x()), 43 SkFloatToScalar(-content_rect.y())); 44 45 gfx::Rect layer_rect = content_rect; 46 47 if (contents_width_scale != 1.f || contents_height_scale != 1.f) { 48 canvas->scale(SkFloatToScalar(contents_width_scale), 49 SkFloatToScalar(contents_height_scale)); 50 51 layer_rect = gfx::ScaleToEnclosingRect( 52 content_rect, 1.f / contents_width_scale, 1.f / contents_height_scale); 53 } 54 55 SkPaint paint; 56 paint.setAntiAlias(false); 57 paint.setXfermodeMode(SkXfermode::kClear_Mode); 58 SkRect layer_sk_rect = SkRect::MakeXYWH( 59 layer_rect.x(), layer_rect.y(), layer_rect.width(), layer_rect.height()); 60 canvas->drawRect(layer_sk_rect, paint); 61 canvas->clipRect(layer_sk_rect); 62 63 gfx::RectF opaque_layer_rect; 64 painter_->Paint(canvas, layer_rect, &opaque_layer_rect); 65 canvas->restore(); 66 67 gfx::Rect opaque_content_rect = gfx::ToEnclosedRect(gfx::ScaleRect( 68 opaque_layer_rect, contents_width_scale, contents_height_scale)); 69 *resulting_opaque_rect = opaque_content_rect; 70 71 content_rect_ = content_rect; 72 } 73 74 } // namespace cc 75
