OLD | NEW |
1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef GrSWMaskHelper_DEFINED | 8 #ifndef GrSWMaskHelper_DEFINED |
9 #define GrSWMaskHelper_DEFINED | 9 #define GrSWMaskHelper_DEFINED |
10 | 10 |
11 #include "SkAutoPixmapStorage.h" | 11 #include "SkAutoPixmapStorage.h" |
12 #include "GrColor.h" | 12 #include "GrColor.h" |
13 #include "GrPipelineBuilder.h" | 13 #include "GrPipelineBuilder.h" |
14 #include "SkBitmap.h" | 14 #include "SkBitmap.h" |
15 #include "SkDraw.h" | 15 #include "SkDraw.h" |
16 #include "SkMatrix.h" | 16 #include "SkMatrix.h" |
17 #include "SkRasterClip.h" | 17 #include "SkRasterClip.h" |
18 #include "SkRegion.h" | 18 #include "SkRegion.h" |
19 #include "SkTypes.h" | 19 #include "SkTypes.h" |
20 | 20 |
21 class GrClip; | 21 class GrClip; |
22 class GrContext; | 22 class GrTextureProvider; |
23 class GrTexture; | 23 class GrTexture; |
24 class SkPath; | 24 class SkPath; |
25 class SkStrokeRec; | 25 class SkStrokeRec; |
26 class GrDrawTarget; | 26 class GrDrawTarget; |
27 | 27 |
28 /** | 28 /** |
29 * The GrSWMaskHelper helps generate clip masks using the software rendering | 29 * The GrSWMaskHelper helps generate clip masks using the software rendering |
30 * path. It is intended to be used as: | 30 * path. It is intended to be used as: |
31 * | 31 * |
32 * GrSWMaskHelper helper(context); | 32 * GrSWMaskHelper helper(context); |
33 * helper.init(...); | 33 * helper.init(...); |
34 * | 34 * |
35 * draw one or more paths/rects specifying the required boolean ops | 35 * draw one or more paths/rects specifying the required boolean ops |
36 * | 36 * |
37 * toTexture(); // to get it from the internal bitmap to the GPU | 37 * toTexture(); // to get it from the internal bitmap to the GPU |
38 * | 38 * |
39 * The result of this process will be the final mask (on the GPU) in the | 39 * The result of this process will be the final mask (on the GPU) in the |
40 * upper left hand corner of the texture. | 40 * upper left hand corner of the texture. |
41 */ | 41 */ |
42 class GrSWMaskHelper : SkNoncopyable { | 42 class GrSWMaskHelper : SkNoncopyable { |
43 public: | 43 public: |
44 GrSWMaskHelper(GrContext* context) : fContext(context) { } | 44 GrSWMaskHelper(GrTextureProvider* texProvider) : fTexProvider(texProvider) {
} |
45 | 45 |
46 // set up the internal state in preparation for draws. Since many masks | 46 // set up the internal state in preparation for draws. Since many masks |
47 // may be accumulated in the helper during creation, "resultBounds" | 47 // may be accumulated in the helper during creation, "resultBounds" |
48 // allows the caller to specify the region of interest - to limit the | 48 // allows the caller to specify the region of interest - to limit the |
49 // amount of work. | 49 // amount of work. |
50 bool init(const SkIRect& resultBounds, const SkMatrix* matrix); | 50 bool init(const SkIRect& resultBounds, const SkMatrix* matrix); |
51 | 51 |
52 // Draw a single rect into the accumulation bitmap using the specified op | 52 // Draw a single rect into the accumulation bitmap using the specified op |
53 void drawRect(const SkRect& rect, SkRegion::Op op, bool antiAlias, uint8_t a
lpha); | 53 void drawRect(const SkRect& rect, SkRegion::Op op, bool antiAlias, uint8_t a
lpha); |
54 | 54 |
55 // Draw a single path into the accumuation bitmap using the specified op | 55 // Draw a single path into the accumuation bitmap using the specified op |
56 void drawPath(const SkPath& path, const GrStyle& style, SkRegion::Op op, | 56 void drawPath(const SkPath& path, const GrStyle& style, SkRegion::Op op, |
57 bool antiAlias, uint8_t alpha); | 57 bool antiAlias, uint8_t alpha); |
58 | 58 |
59 // Move the mask generation results from the internal bitmap to the gpu. | 59 // Move the mask generation results from the internal bitmap to the gpu. |
60 void toTexture(GrTexture* texture); | 60 void toTexture(GrTexture* texture); |
61 | 61 |
62 // Convert mask generation results to a signed distance field | 62 // Convert mask generation results to a signed distance field |
63 void toSDF(unsigned char* sdf); | 63 void toSDF(unsigned char* sdf); |
64 | 64 |
65 // Reset the internal bitmap | 65 // Reset the internal bitmap |
66 void clear(uint8_t alpha) { | 66 void clear(uint8_t alpha) { |
67 fPixels.erase(SkColorSetARGB(alpha, 0xFF, 0xFF, 0xFF)); | 67 fPixels.erase(SkColorSetARGB(alpha, 0xFF, 0xFF, 0xFF)); |
68 } | 68 } |
69 | 69 |
70 // Canonical usage utility that draws a single path and uploads it | 70 // Canonical usage utility that draws a single path and uploads it |
71 // to the GPU. The result is returned. | 71 // to the GPU. The result is returned. |
72 static GrTexture* DrawPathMaskToTexture(GrContext* context, | 72 static GrTexture* DrawPathMaskToTexture(GrTextureProvider*, |
73 const SkPath& path, | 73 const SkPath& path, |
74 const GrStyle& style, | 74 const GrStyle& style, |
75 const SkIRect& resultBounds, | 75 const SkIRect& resultBounds, |
76 bool antiAlias, | 76 bool antiAlias, |
77 const SkMatrix* matrix); | 77 const SkMatrix* matrix); |
78 | 78 |
79 // This utility routine is used to add a path's mask to some other draw. | 79 // This utility routine is used to add a path's mask to some other draw. |
80 // The ClipMaskManager uses it to accumulate clip masks while the | 80 // The ClipMaskManager uses it to accumulate clip masks while the |
81 // GrSoftwarePathRenderer uses it to fulfill a drawPath call. | 81 // GrSoftwarePathRenderer uses it to fulfill a drawPath call. |
82 // It draws with "texture" as a path mask into "target" using "rect" as | 82 // It draws with "texture" as a path mask into "target" using "rect" as |
83 // geometry and the current drawState. The current drawState is altered to | 83 // geometry and the current drawState. The current drawState is altered to |
84 // accommodate the mask. | 84 // accommodate the mask. |
85 // Note that this method assumes that the GrPaint::kTotalStages slot in | 85 // Note that this method assumes that the GrPaint::kTotalStages slot in |
86 // the draw state can be used to hold the mask texture stage. | 86 // the draw state can be used to hold the mask texture stage. |
87 // This method is really only intended to be used with the | 87 // This method is really only intended to be used with the |
88 // output of DrawPathMaskToTexture. | 88 // output of DrawPathMaskToTexture. |
89 static void DrawToTargetWithPathMask(GrTexture* texture, | 89 static void DrawToTargetWithPathMask(GrTexture* texture, |
90 GrDrawTarget* target, | 90 GrDrawTarget* target, |
91 GrPipelineBuilder* pipelineBuilder, | 91 GrPipelineBuilder* pipelineBuilder, |
92 const GrClip&, | 92 const GrClip&, |
93 GrColor, | 93 GrColor, |
94 const SkMatrix& viewMatrix, | 94 const SkMatrix& viewMatrix, |
95 const SkIRect& rect); | 95 const SkIRect& rect); |
96 | 96 |
97 private: | 97 private: |
98 // Helper function to get a scratch texture suitable for capturing the | 98 // Helper function to get a scratch texture suitable for capturing the |
99 // result (i.e., right size & format) | 99 // result (i.e., right size & format) |
100 GrTexture* createTexture(); | 100 GrTexture* createTexture(); |
101 | 101 |
102 GrContext* fContext; | 102 GrTextureProvider* fTexProvider; |
103 SkMatrix fMatrix; | 103 SkMatrix fMatrix; |
104 SkAutoPixmapStorage fPixels; | 104 SkAutoPixmapStorage fPixels; |
105 SkDraw fDraw; | 105 SkDraw fDraw; |
106 SkRasterClip fRasterClip; | 106 SkRasterClip fRasterClip; |
107 | 107 |
108 typedef SkNoncopyable INHERITED; | 108 typedef SkNoncopyable INHERITED; |
109 }; | 109 }; |
110 | 110 |
111 #endif // GrSWMaskHelper_DEFINED | 111 #endif // GrSWMaskHelper_DEFINED |
OLD | NEW |