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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 #include "GrSWMaskHelper.h" | 8 #include "GrSWMaskHelper.h" |
9 | 9 |
10 #include "GrDrawState.h" | 10 #include "GrDrawState.h" |
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354 | 354 |
355 // We want to use device coords to compute the texture coordinates. We set o
ur matrix to be | 355 // We want to use device coords to compute the texture coordinates. We set o
ur matrix to be |
356 // equal to the view matrix followed by a translation so that the top-left o
f the device bounds | 356 // equal to the view matrix followed by a translation so that the top-left o
f the device bounds |
357 // maps to 0,0, and then a scaling matrix to normalized coords. We apply thi
s matrix to the | 357 // maps to 0,0, and then a scaling matrix to normalized coords. We apply thi
s matrix to the |
358 // vertex positions rather than local coords. | 358 // vertex positions rather than local coords. |
359 SkMatrix maskMatrix; | 359 SkMatrix maskMatrix; |
360 maskMatrix.setIDiv(texture->width(), texture->height()); | 360 maskMatrix.setIDiv(texture->width(), texture->height()); |
361 maskMatrix.preTranslate(SkIntToScalar(-rect.fLeft), SkIntToScalar(-rect.fTop
)); | 361 maskMatrix.preTranslate(SkIntToScalar(-rect.fLeft), SkIntToScalar(-rect.fTop
)); |
362 maskMatrix.preConcat(drawState->getViewMatrix()); | 362 maskMatrix.preConcat(drawState->getViewMatrix()); |
363 | 363 |
364 drawState->addCoverageEffect( | 364 drawState->addCoverageProcessor( |
365 GrSimpleTextureEffect::Create(texture, | 365 GrSimpleTextureEffect::Create(texture, |
366 maskMatrix, | 366 maskMatrix, |
367 GrTextureParams::kNone_Fi
lterMode, | 367 GrTextureParams::kNone_Fi
lterMode, |
368 kPosition_GrCoordSet))->u
nref(); | 368 kPosition_GrCoordSet))->u
nref(); |
369 | 369 |
370 target->drawSimpleRect(dstRect); | 370 target->drawSimpleRect(dstRect); |
371 } | 371 } |
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