1 // Copyright (c) 2012 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 "base/basictypes.h" 6 #include "base/compiler_specific.h" 7 #include "ui/gfx/canvas.h" 8 #include "ui/gfx/canvas_skia_paint.h" 9 #include "ui/gfx/rect.h" 10 11 namespace gfx { 12 13 CanvasSkiaPaint::CanvasSkiaPaint(HWND hwnd, HDC dc, const PAINTSTRUCT& ps) 14 : hwnd_(hwnd), 15 paint_dc_(dc) { 16 memset(&ps_, 0, sizeof(ps_)); 17 ps_.rcPaint.left = ps.rcPaint.left; 18 ps_.rcPaint.right = ps.rcPaint.right; 19 ps_.rcPaint.top = ps.rcPaint.top; 20 ps_.rcPaint.bottom = ps.rcPaint.bottom; 21 Init(true); 22 } 23 24 CanvasSkiaPaint::CanvasSkiaPaint(HDC dc, bool opaque, int x, int y, 25 int w, int h) 26 : hwnd_(NULL), 27 paint_dc_(dc) { 28 memset(&ps_, 0, sizeof(ps_)); 29 ps_.rcPaint.left = x; 30 ps_.rcPaint.right = x + w; 31 ps_.rcPaint.top = y; 32 ps_.rcPaint.bottom = y + h; 33 Init(opaque); 34 } 35 36 CanvasSkiaPaint::~CanvasSkiaPaint() { 37 if (!is_empty()) { 38 skia::PlatformCanvas* canvas = platform_canvas(); 39 canvas->restoreToCount(1); 40 // Commit the drawing to the screen 41 skia::DrawToNativeContext(canvas, paint_dc_, ps_.rcPaint.left, 42 ps_.rcPaint.top, NULL); 43 } 44 } 45 46 gfx::Rect CanvasSkiaPaint::GetInvalidRect() const { 47 return gfx::Rect(paint_struct().rcPaint); 48 } 49 50 void CanvasSkiaPaint::Init(bool opaque) { 51 // FIXME(brettw) for ClearType, we probably want to expand the bounds of 52 // painting by one pixel so that the boundaries will be correct (ClearType 53 // text can depend on the adjacent pixel). Then we would paint just the 54 // inset pixels to the screen. 55 const int width = ps_.rcPaint.right - ps_.rcPaint.left; 56 const int height = ps_.rcPaint.bottom - ps_.rcPaint.top; 57 58 RecreateBackingCanvas(gfx::Size(width, height), 59 gfx::win::GetDeviceScaleFactor(), 60 opaque); 61 skia::PlatformCanvas* canvas = platform_canvas(); 62 63 canvas->clear(SkColorSetARGB(0, 0, 0, 0)); 64 65 // This will bring the canvas into the screen coordinate system for the 66 // dirty rect 67 canvas->translate( 68 -ps_.rcPaint.left / gfx::win::GetDeviceScaleFactor(), 69 -ps_.rcPaint.top / gfx::win::GetDeviceScaleFactor()); 70 } 71 72 } // namespace gfx 73
