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| 1 // Copyright (c) 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 #ifndef SKIA_EXT_VECTOR_PLATFORM_DEVICE_CAIRO_LINUX_H_ | |
| 6 #define SKIA_EXT_VECTOR_PLATFORM_DEVICE_CAIRO_LINUX_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include "base/basictypes.h" | |
| 10 #include "base/compiler_specific.h" | |
| 11 #include "skia/ext/platform_device.h" | |
| 12 #include "third_party/skia/include/core/SkMatrix.h" | |
| 13 #include "third_party/skia/include/core/SkRegion.h" | |
| 14 | |
| 15 namespace skia { | |
| 16 | |
| 17 // This device is basically a wrapper that provides a surface for SkCanvas | |
| 18 // to draw into. It is basically an adaptor which converts skia APIs into | |
| 19 // cooresponding Cairo APIs and outputs to a Cairo surface. Please NOTE that | |
| 20 // since it is completely vectorial, the bitmap content in it is thus | |
| 21 // meaningless. | |
| 22 class SK_API VectorPlatformDeviceCairo : public PlatformDevice, | |
| 23 public SkDevice { | |
| 24 public: | |
| 25 virtual ~VectorPlatformDeviceCairo(); | |
| 26 | |
| 27 static SkDevice* CreateDevice(cairo_t* context, int width, int height, | |
| 28 bool isOpaque); | |
| 29 | |
| 30 // Clean up cached fonts. It is an error to call this while some | |
| 31 // VectorPlatformDeviceCairo callee is still using fonts created for it by | |
| 32 // this class. | |
| 33 static void ClearFontCache(); | |
| 34 | |
| 35 // Overridden from SkDevice | |
| 36 virtual uint32_t getDeviceCapabilities(); | |
| 37 virtual void drawPaint(const SkDraw& draw, const SkPaint& paint) OVERRIDE; | |
| 38 virtual void drawPoints(const SkDraw& draw, SkCanvas::PointMode mode, | |
| 39 size_t count, const SkPoint[], | |
| 40 const SkPaint& paint) OVERRIDE; | |
| 41 virtual void drawRect(const SkDraw& draw, const SkRect& r, | |
| 42 const SkPaint& paint) OVERRIDE; | |
| 43 virtual void drawPath(const SkDraw& draw, const SkPath& path, | |
| 44 const SkPaint& paint, | |
| 45 const SkMatrix* prePathMatrix = NULL, | |
| 46 bool pathIsMutable = false) OVERRIDE; | |
| 47 virtual void drawBitmap(const SkDraw& draw, const SkBitmap& bitmap, | |
| 48 const SkIRect* srcRectOrNull, | |
| 49 const SkMatrix& matrix, | |
| 50 const SkPaint& paint) OVERRIDE; | |
| 51 virtual void drawSprite(const SkDraw& draw, const SkBitmap& bitmap, | |
| 52 int x, int y, const SkPaint& paint) OVERRIDE; | |
| 53 virtual void drawText(const SkDraw& draw, const void* text, size_t len, | |
| 54 SkScalar x, SkScalar y, const SkPaint& paint) OVERRIDE; | |
| 55 virtual void drawPosText(const SkDraw& draw, const void* text, size_t len, | |
| 56 const SkScalar pos[], SkScalar constY, | |
| 57 int scalarsPerPos, const SkPaint& paint) OVERRIDE; | |
| 58 virtual void drawTextOnPath(const SkDraw& draw, const void* text, size_t len, | |
| 59 const SkPath& path, const SkMatrix* matrix, | |
| 60 const SkPaint& paint) OVERRIDE; | |
| 61 virtual void drawVertices(const SkDraw& draw, SkCanvas::VertexMode, | |
| 62 int vertexCount, | |
| 63 const SkPoint verts[], const SkPoint texs[], | |
| 64 const SkColor colors[], SkXfermode* xmode, | |
| 65 const uint16_t indices[], int indexCount, | |
| 66 const SkPaint& paint) OVERRIDE; | |
| 67 virtual void drawDevice(const SkDraw& draw, SkDevice*, int x, int y, | |
| 68 const SkPaint&) OVERRIDE; | |
| 69 | |
| 70 virtual void setMatrixClip(const SkMatrix& transform, const SkRegion& region, | |
| 71 const SkClipStack&) OVERRIDE; | |
| 72 | |
| 73 // Overridden from PlatformDevice | |
| 74 virtual PlatformSurface BeginPlatformPaint() OVERRIDE; | |
| 75 virtual void DrawToNativeContext(PlatformSurface surface, int x, int y, | |
| 76 const PlatformRect* src_rect) OVERRIDE; | |
| 77 | |
| 78 protected: | |
| 79 VectorPlatformDeviceCairo(PlatformSurface context, const SkBitmap& bitmap); | |
| 80 | |
| 81 virtual SkDevice* onCreateCompatibleDevice(SkBitmap::Config, int width, | |
| 82 int height, bool isOpaque, | |
| 83 Usage usage) OVERRIDE; | |
| 84 | |
| 85 private: | |
| 86 // Apply paint's color in the context. | |
| 87 void ApplyPaintColor(const SkPaint& paint); | |
| 88 | |
| 89 // Apply path's fill style in the context. | |
| 90 void ApplyFillStyle(const SkPath& path); | |
| 91 | |
| 92 // Apply paint's stroke style in the context. | |
| 93 void ApplyStrokeStyle(const SkPaint& paint); | |
| 94 | |
| 95 // Perform painting. | |
| 96 void DoPaintStyle(const SkPaint& paint); | |
| 97 | |
| 98 // Draws a bitmap in the the device, using the currently loaded matrix. | |
| 99 void InternalDrawBitmap(const SkBitmap& bitmap, int x, int y, | |
| 100 const SkPaint& paint); | |
| 101 | |
| 102 // Set up the clipping region for the context. Please note that now we only | |
| 103 // use the bounding box of the region for clipping. | |
| 104 // TODO(myhuang): Support non-rectangular clipping. | |
| 105 void LoadClipRegion(const SkRegion& clip); | |
| 106 | |
| 107 // Use identity matrix to set up context's transformation. | |
| 108 void LoadIdentityTransformToContext(); | |
| 109 | |
| 110 // Use matrix to set up context's transformation. | |
| 111 void LoadTransformToContext(const SkMatrix& matrix); | |
| 112 | |
| 113 // Selects the font associated with |font_id| in |context|. | |
| 114 // Return true on success. | |
| 115 bool SelectFontById(uint32_t font_id); | |
| 116 | |
| 117 // Transformation assigned to the context. | |
| 118 SkMatrix transform_; | |
| 119 | |
| 120 // The current clipping region. | |
| 121 SkRegion clip_region_; | |
| 122 | |
| 123 // Device context. | |
| 124 PlatformSurface context_; | |
| 125 | |
| 126 DISALLOW_COPY_AND_ASSIGN(VectorPlatformDeviceCairo); | |
| 127 }; | |
| 128 | |
| 129 } // namespace skia | |
| 130 | |
| 131 #endif // SKIA_EXT_VECTOR_PLATFORM_DEVICE_CAIRO_LINUX_H_ | |
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Chromium Code Reviews
Issue 7847002:
Removed unneeded cairo code. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src