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Side by Side Diff: src/effects/SkColorCubeFilter.cpp

Issue 1457543003: Add ShaderBuilders to EmitArgs and remove gettings from ProgBuilder. (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 5 years, 1 month ago
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1 /* 1 /*
2 * Copyright 2014 Google Inc. 2 * Copyright 2014 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 #include "SkColorCubeFilter.h" 8 #include "SkColorCubeFilter.h"
9 #include "SkColorPriv.h" 9 #include "SkColorPriv.h"
10 #include "SkOnce.h" 10 #include "SkOnce.h"
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257 257
258 const char* nonZeroAlpha = "nonZeroAlpha"; 258 const char* nonZeroAlpha = "nonZeroAlpha";
259 const char* unPMColor = "unPMColor"; 259 const char* unPMColor = "unPMColor";
260 const char* cubeIdx = "cubeIdx"; 260 const char* cubeIdx = "cubeIdx";
261 const char* cCoords1 = "cCoords1"; 261 const char* cCoords1 = "cCoords1";
262 const char* cCoords2 = "cCoords2"; 262 const char* cCoords2 = "cCoords2";
263 263
264 // Note: if implemented using texture3D in OpenGL ES older than OpenGL ES 3. 0, 264 // Note: if implemented using texture3D in OpenGL ES older than OpenGL ES 3. 0,
265 // the shader might need "#extension GL_OES_texture_3D : enable". 265 // the shader might need "#extension GL_OES_texture_3D : enable".
266 266
267 GrGLSLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder() ; 267 GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
268 268
269 // Unpremultiply color 269 // Unpremultiply color
270 fsBuilder->codeAppendf("\tfloat %s = max(%s.a, 0.00001);\n", nonZeroAlpha, a rgs.fInputColor); 270 fragBuilder->codeAppendf("\tfloat %s = max(%s.a, 0.00001);\n", nonZeroAlpha, args.fInputColor);
271 fsBuilder->codeAppendf("\tvec4 %s = vec4(%s.rgb / %s, %s);\n", 271 fragBuilder->codeAppendf("\tvec4 %s = vec4(%s.rgb / %s, %s);\n",
272 unPMColor, args.fInputColor, nonZeroAlpha, nonZeroAlp ha); 272 unPMColor, args.fInputColor, nonZeroAlpha, nonZeroA lpha);
273 273
274 // Fit input color into the cube. 274 // Fit input color into the cube.
275 fsBuilder->codeAppendf( 275 fragBuilder->codeAppendf(
276 "vec3 %s = vec3(%s.rg * vec2((%s - 1.0) * %s) + vec2(0.5 * %s), %s.b * ( %s - 1.0));\n", 276 "vec3 %s = vec3(%s.rg * vec2((%s - 1.0) * %s) + vec2(0.5 * %s), %s.b * ( %s - 1.0));\n",
277 cubeIdx, unPMColor, colorCubeSizeUni, colorCubeInvSizeUni, colorCubeInvS izeUni, 277 cubeIdx, unPMColor, colorCubeSizeUni, colorCubeInvSizeUni, colorCubeInvS izeUni,
278 unPMColor, colorCubeSizeUni); 278 unPMColor, colorCubeSizeUni);
279 279
280 // Compute y coord for for texture fetches. 280 // Compute y coord for for texture fetches.
281 fsBuilder->codeAppendf("vec2 %s = vec2(%s.r, (floor(%s.b) + %s.g) * %s);\n", 281 fragBuilder->codeAppendf("vec2 %s = vec2(%s.r, (floor(%s.b) + %s.g) * %s);\n ",
282 cCoords1, cubeIdx, cubeIdx, cubeIdx, colorCubeInvSize Uni); 282 cCoords1, cubeIdx, cubeIdx, cubeIdx, colorCubeInvSi zeUni);
283 fsBuilder->codeAppendf("vec2 %s = vec2(%s.r, (ceil(%s.b) + %s.g) * %s);\n", 283 fragBuilder->codeAppendf("vec2 %s = vec2(%s.r, (ceil(%s.b) + %s.g) * %s);\n" ,
284 cCoords2, cubeIdx, cubeIdx, cubeIdx, colorCubeInvSize Uni); 284 cCoords2, cubeIdx, cubeIdx, cubeIdx, colorCubeInvSi zeUni);
285 285
286 // Apply the cube. 286 // Apply the cube.
287 fsBuilder->codeAppendf("%s = vec4(mix(", args.fOutputColor); 287 fragBuilder->codeAppendf("%s = vec4(mix(", args.fOutputColor);
288 fsBuilder->appendTextureLookup(args.fSamplers[0], cCoords1); 288 fragBuilder->appendTextureLookup(args.fSamplers[0], cCoords1);
289 fsBuilder->codeAppend(".rgb, "); 289 fragBuilder->codeAppend(".rgb, ");
290 fsBuilder->appendTextureLookup(args.fSamplers[0], cCoords2); 290 fragBuilder->appendTextureLookup(args.fSamplers[0], cCoords2);
291 291
292 // Premultiply color by alpha. Note that the input alpha is not modified by this shader. 292 // Premultiply color by alpha. Note that the input alpha is not modified by this shader.
293 fsBuilder->codeAppendf(".rgb, fract(%s.b)) * vec3(%s), %s.a);\n", 293 fragBuilder->codeAppendf(".rgb, fract(%s.b)) * vec3(%s), %s.a);\n",
294 cubeIdx, nonZeroAlpha, args.fInputColor); 294 cubeIdx, nonZeroAlpha, args.fInputColor);
295 } 295 }
296 296
297 void GrColorCubeEffect::GLSLProcessor::onSetData(const GrGLSLProgramDataManager& pdman, 297 void GrColorCubeEffect::GLSLProcessor::onSetData(const GrGLSLProgramDataManager& pdman,
298 const GrProcessor& proc) { 298 const GrProcessor& proc) {
299 const GrColorCubeEffect& colorCube = proc.cast<GrColorCubeEffect>(); 299 const GrColorCubeEffect& colorCube = proc.cast<GrColorCubeEffect>();
300 SkScalar size = SkIntToScalar(colorCube.colorCubeSize()); 300 SkScalar size = SkIntToScalar(colorCube.colorCubeSize());
301 pdman.set1f(fColorCubeSizeUni, SkScalarToFloat(size)); 301 pdman.set1f(fColorCubeSizeUni, SkScalarToFloat(size));
302 pdman.set1f(fColorCubeInvSizeUni, SkScalarToFloat(SkScalarInvert(size))); 302 pdman.set1f(fColorCubeInvSizeUni, SkScalarToFloat(SkScalarInvert(size)));
303 } 303 }
304 304
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327 if (textureCube) { 327 if (textureCube) {
328 context->textureProvider()->assignUniqueKeyToTexture(key, textureCub e); 328 context->textureProvider()->assignUniqueKeyToTexture(key, textureCub e);
329 } else { 329 } else {
330 return nullptr; 330 return nullptr;
331 } 331 }
332 } 332 }
333 333
334 return GrColorCubeEffect::Create(textureCube); 334 return GrColorCubeEffect::Create(textureCube);
335 } 335 }
336 #endif 336 #endif
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