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| 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 | |
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