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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 #include "GrGLProgramDesc.h" | 7 #include "GrGLProgramDesc.h" |
8 | 8 |
9 #include "GrProcessor.h" | 9 #include "GrProcessor.h" |
10 #include "GrGLGpu.h" | 10 #include "GrGLGpu.h" |
11 #include "GrPipeline.h" | 11 #include "GrPipeline.h" |
12 #include "SkChecksum.h" | 12 #include "SkChecksum.h" |
13 #include "glsl/GrGLSLFragmentProcessor.h" | 13 #include "glsl/GrGLSLFragmentProcessor.h" |
14 #include "glsl/GrGLSLFragmentShaderBuilder.h" | 14 #include "glsl/GrGLSLFragmentShaderBuilder.h" |
15 | 15 |
16 /** | 16 |
17 * Do we need to either map r,g,b->a or a->r. configComponentMask indicates whic
h channels are | 17 static void add_texture_key(GrProcessorKeyBuilder* b, const GrProcessor& proc, |
18 * present in the texture's config. swizzleComponentMask indicates the channels
present in the | 18 const GrGLSLCaps& caps) { |
19 * shader swizzle. | 19 int numTextures = proc.numTextures(); |
20 */ | 20 // Need two bytes per key (swizzle and target). |
21 static bool swizzle_requires_alpha_remapping(const GrGLSLCaps& caps, GrPixelConf
ig config) { | 21 int word32Count = (proc.numTextures() + 1) / 2; |
22 if (!caps.mustSwizzleInShader()) { | 22 if (0 == word32Count) { |
23 // Any remapping is handled using texture swizzling not shader modificat
ions. | 23 return; |
24 return false; | |
25 } | 24 } |
26 const char* swizzleMap = caps.getSwizzleMap(config); | 25 uint16_t* k16 = SkTCast<uint16_t*>(b->add32n(word32Count)); |
27 | 26 for (int i = 0; i < numTextures; ++i) { |
28 return SkToBool(memcmp(swizzleMap, "rgba", 4)); | 27 const GrTextureAccess& access = proc.textureAccess(i); |
29 } | 28 bool isExternal = (GR_GL_TEXTURE_EXTERNAL == |
30 | 29 static_cast<GrGLTexture*>(access.getTexture())->targe
t()); |
31 static uint32_t gen_texture_key(const GrProcessor& proc, const GrGLCaps& caps) { | 30 k16[i] = caps.configTextureSwizzle(access.getTexture()->config()).asKey(
) | |
32 uint32_t key = 0; | 31 (isExternal ? 0xFF00 : 0x0000); |
33 int numTextures = proc.numTextures(); | |
34 int shift = 0; | |
35 for (int t = 0; t < numTextures; ++t) { | |
36 const GrTextureAccess& access = proc.textureAccess(t); | |
37 if (swizzle_requires_alpha_remapping(*caps.glslCaps(), access.getTexture
()->config())) { | |
38 key |= 1 << shift; | |
39 } | |
40 if (GR_GL_TEXTURE_EXTERNAL == static_cast<GrGLTexture*>(access.getTextur
e())->target()) { | |
41 key |= 2 << shift; | |
42 } | |
43 shift += 2; | |
44 } | 32 } |
45 return key; | |
46 } | 33 } |
47 | 34 |
48 /** | 35 /** |
49 * A function which emits a meta key into the key builder. This is required bec
ause shader code may | 36 * A function which emits a meta key into the key builder. This is required bec
ause shader code may |
50 * be dependent on properties of the effect that the effect itself doesn't use | 37 * be dependent on properties of the effect that the effect itself doesn't use |
51 * in its key (e.g. the pixel format of textures used). So we create a meta-key
for | 38 * in its key (e.g. the pixel format of textures used). So we create a meta-key
for |
52 * every effect using this function. It is also responsible for inserting the ef
fect's class ID | 39 * every effect using this function. It is also responsible for inserting the ef
fect's class ID |
53 * which must be different for every GrProcessor subclass. It can fail if an eff
ect uses too many | 40 * which must be different for every GrProcessor subclass. It can fail if an eff
ect uses too many |
54 * textures, transforms, etc, for the space allotted in the meta-key. NOTE, bot
h FPs and GPs share | 41 * transforms, etc, for the space allotted in the meta-key. NOTE, both FPs and
GPs share this |
55 * this function because it is hairy, though FPs do not have attribs, and GPs do
not have transforms | 42 * function because it is hairy, though FPs do not have attribs, and GPs do not
have transforms |
56 */ | 43 */ |
57 static bool gen_meta_key(const GrProcessor& proc, | 44 static bool gen_meta_key(const GrProcessor& proc, |
58 const GrGLCaps& caps, | 45 const GrGLCaps& caps, |
59 uint32_t transformKey, | 46 uint32_t transformKey, |
60 GrProcessorKeyBuilder* b) { | 47 GrProcessorKeyBuilder* b) { |
61 size_t processorKeySize = b->size(); | 48 size_t processorKeySize = b->size(); |
62 uint32_t textureKey = gen_texture_key(proc, caps); | |
63 uint32_t classID = proc.classID(); | 49 uint32_t classID = proc.classID(); |
64 | 50 |
65 // Currently we allow 16 bits for the class id and the overall processor key
size. | 51 // Currently we allow 16 bits for the class id and the overall processor key
size. |
66 static const uint32_t kMetaKeyInvalidMask = ~((uint32_t) SK_MaxU16); | 52 static const uint32_t kMetaKeyInvalidMask = ~((uint32_t) SK_MaxU16); |
67 if ((processorKeySize | classID) & kMetaKeyInvalidMask) { | 53 if ((processorKeySize | classID) & kMetaKeyInvalidMask) { |
68 return false; | 54 return false; |
69 } | 55 } |
70 | 56 |
71 uint32_t* key = b->add32n(3); | 57 add_texture_key(b, proc, *caps.glslCaps()); |
| 58 |
| 59 uint32_t* key = b->add32n(2); |
72 key[0] = (classID << 16) | SkToU32(processorKeySize); | 60 key[0] = (classID << 16) | SkToU32(processorKeySize); |
73 key[1] = textureKey; | 61 key[1] = transformKey; |
74 key[2] = transformKey; | |
75 return true; | 62 return true; |
76 } | 63 } |
77 | 64 |
78 static bool gen_frag_proc_and_meta_keys(const GrPrimitiveProcessor& primProc, | 65 static bool gen_frag_proc_and_meta_keys(const GrPrimitiveProcessor& primProc, |
79 const GrFragmentProcessor& fp, | 66 const GrFragmentProcessor& fp, |
80 const GrGLCaps& caps, | 67 const GrGLCaps& caps, |
81 GrProcessorKeyBuilder* b) { | 68 GrProcessorKeyBuilder* b) { |
82 for (int i = 0; i < fp.numChildProcessors(); ++i) { | 69 for (int i = 0; i < fp.numChildProcessors(); ++i) { |
83 if (!gen_frag_proc_and_meta_keys(primProc, fp.childProcessor(i), caps, b
)) { | 70 if (!gen_frag_proc_and_meta_keys(primProc, fp.childProcessor(i), caps, b
)) { |
84 return false; | 71 return false; |
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153 } else { | 140 } else { |
154 header->fIgnoresCoverage = 0; | 141 header->fIgnoresCoverage = 0; |
155 } | 142 } |
156 | 143 |
157 header->fSnapVerticesToPixelCenters = pipeline.snapVerticesToPixelCenters(); | 144 header->fSnapVerticesToPixelCenters = pipeline.snapVerticesToPixelCenters(); |
158 header->fColorEffectCnt = pipeline.numColorFragmentProcessors(); | 145 header->fColorEffectCnt = pipeline.numColorFragmentProcessors(); |
159 header->fCoverageEffectCnt = pipeline.numCoverageFragmentProcessors(); | 146 header->fCoverageEffectCnt = pipeline.numCoverageFragmentProcessors(); |
160 glDesc->finalize(); | 147 glDesc->finalize(); |
161 return true; | 148 return true; |
162 } | 149 } |
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