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| 1 /* |
| 2 * Copyright 2015 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 "GrXferProcessor.h" |
| 9 #include "gl/GrGLCaps.h" |
| 10 |
| 11 GrXferProcessor::GrXferProcessor() : fWillReadDstColor(false), fDstCopyTextureOf
fset() { |
| 12 } |
| 13 |
| 14 GrXferProcessor::GrXferProcessor(const GrDeviceCoordTexture* dstCopy, bool willR
eadDstColor) |
| 15 : fWillReadDstColor(willReadDstColor) |
| 16 , fDstCopyTextureOffset() { |
| 17 if (dstCopy && dstCopy->texture()) { |
| 18 fDstCopy.reset(dstCopy->texture()); |
| 19 fDstCopyTextureOffset = dstCopy->offset(); |
| 20 SkASSERT(kTopLeft_GrSurfaceOrigin == fDstCopy.getTexture()->origin()); |
| 21 this->addTextureAccess(&fDstCopy); |
| 22 } |
| 23 } |
| 24 |
| 25 void GrXferProcessor::getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuil
der* b) const { |
| 26 uint32_t key = this->willReadDstColor() ? 0x1 : 0x0; |
| 27 b->add32(key); |
| 28 this->onGetGLProcessorKey(caps, b); |
| 29 } |
| 30 |
| 31 /////////////////////////////////////////////////////////////////////////////// |
| 32 |
| 33 GrXferProcessor* GrXPFactory::createXferProcessor(const GrProcOptInfo& colorPOI, |
| 34 const GrProcOptInfo& coverageP
OI, |
| 35 const GrDeviceCoordTexture* ds
tCopy, |
| 36 const GrDrawTargetCaps& caps)
const { |
| 37 #ifdef SK_DEBUG |
| 38 if (this->willReadDstColor()) { |
| 39 if (!caps.dstReadInShaderSupport()) { |
| 40 SkASSERT(dstCopy && dstCopy->texture()); |
| 41 } else { |
| 42 SkASSERT(!dstCopy || !dstCopy->texture()); |
| 43 } |
| 44 } else { |
| 45 SkASSERT(!dstCopy || !dstCopy->texture()); |
| 46 |
| 47 } |
| 48 #endif |
| 49 return this->onCreateXferProcessor(colorPOI, coveragePOI, dstCopy); |
| 50 } |
| 51 |
| 52 bool GrXPFactory::willNeedDstCopy(const GrDrawTargetCaps& caps) const { |
| 53 return (this->willReadDstColor() && !caps.dstReadInShaderSupport()); |
| 54 } |
| 55 |
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