1 /*
2 * Copyright 2012 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "GrTextureAccess.h"
9 #include "GrColor.h"
10 #include "GrTexture.h"
11
GrTextureAccess()12 GrTextureAccess::GrTextureAccess() {
13 #ifdef SK_DEBUG
14 memcpy(fSwizzle, "void", 5);
15 fSwizzleMask = 0xbeeffeed;
16 #endif
17 }
18
GrTextureAccess(GrTexture * texture,const GrTextureParams & params)19 GrTextureAccess::GrTextureAccess(GrTexture* texture, const GrTextureParams& params) {
20 this->reset(texture, params);
21 }
22
GrTextureAccess(GrTexture * texture,GrTextureParams::FilterMode filterMode,SkShader::TileMode tileXAndY)23 GrTextureAccess::GrTextureAccess(GrTexture* texture,
24 GrTextureParams::FilterMode filterMode,
25 SkShader::TileMode tileXAndY) {
26 this->reset(texture, filterMode, tileXAndY);
27 }
28
GrTextureAccess(GrTexture * texture,const char * swizzle,const GrTextureParams & params)29 GrTextureAccess::GrTextureAccess(GrTexture* texture,
30 const char* swizzle,
31 const GrTextureParams& params) {
32 this->reset(texture, swizzle, params);
33 }
34
GrTextureAccess(GrTexture * texture,const char * swizzle,GrTextureParams::FilterMode filterMode,SkShader::TileMode tileXAndY)35 GrTextureAccess::GrTextureAccess(GrTexture* texture,
36 const char* swizzle,
37 GrTextureParams::FilterMode filterMode,
38 SkShader::TileMode tileXAndY) {
39 this->reset(texture, swizzle, filterMode, tileXAndY);
40 }
41
reset(GrTexture * texture,const char * swizzle,const GrTextureParams & params)42 void GrTextureAccess::reset(GrTexture* texture,
43 const char* swizzle,
44 const GrTextureParams& params) {
45 SkASSERT(texture);
46 SkASSERT(strlen(swizzle) >= 1 && strlen(swizzle) <= 4);
47
48 fParams = params;
49 fTexture.set(SkRef(texture), kRead_GrIOType);
50 this->setSwizzle(swizzle);
51 }
52
reset(GrTexture * texture,const char * swizzle,GrTextureParams::FilterMode filterMode,SkShader::TileMode tileXAndY)53 void GrTextureAccess::reset(GrTexture* texture,
54 const char* swizzle,
55 GrTextureParams::FilterMode filterMode,
56 SkShader::TileMode tileXAndY) {
57 SkASSERT(texture);
58 SkASSERT(strlen(swizzle) >= 1 && strlen(swizzle) <= 4);
59
60 fParams.reset(tileXAndY, filterMode);
61 fTexture.set(SkRef(texture), kRead_GrIOType);
62 this->setSwizzle(swizzle);
63 }
64
reset(GrTexture * texture,const GrTextureParams & params)65 void GrTextureAccess::reset(GrTexture* texture,
66 const GrTextureParams& params) {
67 SkASSERT(texture);
68 fTexture.set(SkRef(texture), kRead_GrIOType);
69 fParams = params;
70 memcpy(fSwizzle, "rgba", 5);
71 fSwizzleMask = kRGBA_GrColorComponentFlags;
72 }
73
reset(GrTexture * texture,GrTextureParams::FilterMode filterMode,SkShader::TileMode tileXAndY)74 void GrTextureAccess::reset(GrTexture* texture,
75 GrTextureParams::FilterMode filterMode,
76 SkShader::TileMode tileXAndY) {
77 SkASSERT(texture);
78 fTexture.set(SkRef(texture), kRead_GrIOType);
79 fParams.reset(tileXAndY, filterMode);
80 memcpy(fSwizzle, "rgba", 5);
81 fSwizzleMask = kRGBA_GrColorComponentFlags;
82 }
83
setSwizzle(const char * swizzle)84 void GrTextureAccess::setSwizzle(const char* swizzle) {
85 fSwizzleMask = 0;
86 memset(fSwizzle, '\0', 5);
87 for (int i = 0; i < 4 && '\0' != swizzle[i]; ++i) {
88 fSwizzle[i] = swizzle[i];
89 switch (swizzle[i]) {
90 case 'r':
91 fSwizzleMask |= kR_GrColorComponentFlag;
92 break;
93 case 'g':
94 fSwizzleMask |= kG_GrColorComponentFlag;
95 break;
96 case 'b':
97 fSwizzleMask |= kB_GrColorComponentFlag;
98 break;
99 case 'a':
100 fSwizzleMask |= kA_GrColorComponentFlag;
101 break;
102 default:
103 SkFAIL("Unexpected swizzle string character.");
104 break;
105 }
106 }
107 }
108