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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 if (!avmr.setIdentity(drawState)) { | 354 if (!avmr.setIdentity(drawState)) { |
355 return; | 355 return; |
356 } | 356 } |
357 GrDrawState::AutoRestoreEffects are(drawState); | 357 GrDrawState::AutoRestoreEffects are(drawState); |
358 | 358 |
359 SkRect dstRect = SkRect::MakeLTRB(SK_Scalar1 * rect.fLeft, | 359 SkRect dstRect = SkRect::MakeLTRB(SK_Scalar1 * rect.fLeft, |
360 SK_Scalar1 * rect.fTop, | 360 SK_Scalar1 * rect.fTop, |
361 SK_Scalar1 * rect.fRight, | 361 SK_Scalar1 * rect.fRight, |
362 SK_Scalar1 * rect.fBottom); | 362 SK_Scalar1 * rect.fBottom); |
363 | 363 |
364 // We want to use device coords to compute the texture coordinates. We set o
ur matrix to be | 364 // We use device coords to compute the texture coordinates. We take the devi
ce coords and apply |
365 // equal to the view matrix followed by a translation so that the top-left o
f the device bounds | 365 // a translation so that the top-left of the device bounds maps to 0,0, and
then a scaling |
366 // maps to 0,0, and then a scaling matrix to normalized coords. We apply thi
s matrix to the | 366 // matrix to normalized coords. |
367 // vertex positions rather than local coords. | |
368 SkMatrix maskMatrix; | 367 SkMatrix maskMatrix; |
369 maskMatrix.setIDiv(texture->width(), texture->height()); | 368 maskMatrix.setIDiv(texture->width(), texture->height()); |
370 maskMatrix.preTranslate(SkIntToScalar(-rect.fLeft), SkIntToScalar(-rect.fTop
)); | 369 maskMatrix.preTranslate(SkIntToScalar(-rect.fLeft), SkIntToScalar(-rect.fTop
)); |
371 maskMatrix.preConcat(drawState->getViewMatrix()); | |
372 | 370 |
373 drawState->addCoverageProcessor( | 371 drawState->addCoverageProcessor( |
374 GrSimpleTextureEffect::Create(texture, | 372 GrSimpleTextureEffect::Create(texture, |
375 maskMatrix, | 373 maskMatrix, |
376 GrTextureParams::kNone_Fi
lterMode, | 374 GrTextureParams::kNone_Fi
lterMode, |
377 kPosition_GrCoordSet))->u
nref(); | 375 kDevice_GrCoordSet))->unr
ef(); |
378 | 376 |
379 target->drawSimpleRect(drawState, color, dstRect); | 377 target->drawSimpleRect(drawState, color, dstRect); |
380 } | 378 } |
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