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| 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 GrTextureAccess_DEFINED | 8 #ifndef GrTextureAccess_DEFINED |
| 9 #define GrTextureAccess_DEFINED | 9 #define GrTextureAccess_DEFINED |
| 10 | 10 |
| 11 #include "GrNoncopyable.h" | |
| 12 #include "SkRefCnt.h" | 11 #include "SkRefCnt.h" |
| 13 #include "SkShader.h" | 12 #include "SkShader.h" |
| 13 #include "SkTypes.h" |
| 14 | 14 |
| 15 class GrTexture; | 15 class GrTexture; |
| 16 | 16 |
| 17 /** | 17 /** |
| 18 * Represents the filtering and tile modes used to access a texture. It is mostl
y used with | 18 * Represents the filtering and tile modes used to access a texture. It is mostl
y used with |
| 19 * GrTextureAccess (defined below). Also, some of the texture cache methods requ
ire knowledge about | 19 * GrTextureAccess (defined below). Also, some of the texture cache methods requ
ire knowledge about |
| 20 * filtering and tiling to perform a cache lookup. If it wasn't for this latter
usage this would | 20 * filtering and tiling to perform a cache lookup. If it wasn't for this latter
usage this would |
| 21 * be folded into GrTextureAccess. The default is clamp tile modes and no filter
ing. | 21 * be folded into GrTextureAccess. The default is clamp tile modes and no filter
ing. |
| 22 */ | 22 */ |
| 23 class GrTextureParams { | 23 class GrTextureParams { |
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| 105 SkShader::TileMode fTileModes[2]; | 105 SkShader::TileMode fTileModes[2]; |
| 106 FilterMode fFilterMode; | 106 FilterMode fFilterMode; |
| 107 }; | 107 }; |
| 108 | 108 |
| 109 /** A class representing the swizzle access pattern for a texture. Note that if
the texture is | 109 /** A class representing the swizzle access pattern for a texture. Note that if
the texture is |
| 110 * an alpha-only texture then the alpha channel is substituted for other compon
ents. Any mangling | 110 * an alpha-only texture then the alpha channel is substituted for other compon
ents. Any mangling |
| 111 * to handle the r,g,b->a conversions for alpha textures is automatically inclu
ded in the stage | 111 * to handle the r,g,b->a conversions for alpha textures is automatically inclu
ded in the stage |
| 112 * key. However, if a GrEffect uses different swizzles based on its input then
it must | 112 * key. However, if a GrEffect uses different swizzles based on its input then
it must |
| 113 * consider that variation in its key-generation. | 113 * consider that variation in its key-generation. |
| 114 */ | 114 */ |
| 115 class GrTextureAccess : GrNoncopyable { | 115 class GrTextureAccess : public SkNoncopyable { |
| 116 public: | 116 public: |
| 117 /** | 117 /** |
| 118 * A default GrTextureAccess must have reset() called on it in a GrEffect su
bclass's | 118 * A default GrTextureAccess must have reset() called on it in a GrEffect su
bclass's |
| 119 * constructor if it will be accessible via GrEffect::textureAccess(). | 119 * constructor if it will be accessible via GrEffect::textureAccess(). |
| 120 */ | 120 */ |
| 121 GrTextureAccess(); | 121 GrTextureAccess(); |
| 122 | 122 |
| 123 /** | 123 /** |
| 124 * Uses the default swizzle, "rgba". | 124 * Uses the default swizzle, "rgba". |
| 125 */ | 125 */ |
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| 175 const GrTextureParams& getParams() const { return fParams; } | 175 const GrTextureParams& getParams() const { return fParams; } |
| 176 | 176 |
| 177 private: | 177 private: |
| 178 void setSwizzle(const char*); | 178 void setSwizzle(const char*); |
| 179 | 179 |
| 180 GrTextureParams fParams; | 180 GrTextureParams fParams; |
| 181 SkAutoTUnref<GrTexture> fTexture; | 181 SkAutoTUnref<GrTexture> fTexture; |
| 182 uint32_t fSwizzleMask; | 182 uint32_t fSwizzleMask; |
| 183 char fSwizzle[5]; | 183 char fSwizzle[5]; |
| 184 | 184 |
| 185 typedef GrNoncopyable INHERITED; | 185 typedef SkNoncopyable INHERITED; |
| 186 }; | 186 }; |
| 187 | 187 |
| 188 #endif | 188 #endif |
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