| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrXferProcessor.h" |
| #include "gl/GrGLCaps.h" |
| |
| GrXferProcessor::GrXferProcessor() : fWillReadDstColor(false), fDstCopyTextureOffset() { |
| } |
| |
| GrXferProcessor::GrXferProcessor(const GrDeviceCoordTexture* dstCopy, bool willReadDstColor) |
| : fWillReadDstColor(willReadDstColor) |
| , fDstCopyTextureOffset() { |
| if (dstCopy && dstCopy->texture()) { |
| fDstCopy.reset(dstCopy->texture()); |
| fDstCopyTextureOffset = dstCopy->offset(); |
| this->addTextureAccess(&fDstCopy); |
| this->setWillReadFragmentPosition(); |
| } |
| } |
| |
| void GrXferProcessor::getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const { |
| uint32_t key = this->willReadDstColor() ? 0x1 : 0x0; |
| if (this->getDstCopyTexture() && |
| kTopLeft_GrSurfaceOrigin == this->getDstCopyTexture()->origin()) { |
| key |= 0x2; |
| } |
| b->add32(key); |
| this->onGetGLProcessorKey(caps, b); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrXferProcessor* GrXPFactory::createXferProcessor(const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI, |
| const GrDeviceCoordTexture* dstCopy, |
| const GrDrawTargetCaps& caps) const { |
| #ifdef SK_DEBUG |
| if (this->willReadDstColor(caps, colorPOI, coveragePOI)) { |
| if (!caps.dstReadInShaderSupport()) { |
| SkASSERT(dstCopy && dstCopy->texture()); |
| } else { |
| SkASSERT(!dstCopy || !dstCopy->texture()); |
| } |
| } else { |
| SkASSERT(!dstCopy || !dstCopy->texture()); |
| } |
| #endif |
| return this->onCreateXferProcessor(caps, colorPOI, coveragePOI, dstCopy); |
| } |
| |
| bool GrXPFactory::willNeedDstCopy(const GrDrawTargetCaps& caps, const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI) const { |
| return (this->willReadDstColor(caps, colorPOI, coveragePOI) && !caps.dstReadInShaderSupport()); |
| } |
| |