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Unified Diff: src/gpu/GrXferProcessor.cpp

Issue 900913002: Revert of Revert "Move DstCopy on gpu into the GrXferProcessor." (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 5 years, 10 months ago
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Index: src/gpu/GrXferProcessor.cpp
diff --git a/src/gpu/GrXferProcessor.cpp b/src/gpu/GrXferProcessor.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..87d5fe65ac7b4345469daf664afc2b8d6c6e56b2
--- /dev/null
+++ b/src/gpu/GrXferProcessor.cpp
@@ -0,0 +1,55 @@
+/*
+ * 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();
+ SkASSERT(kTopLeft_GrSurfaceOrigin == fDstCopy.getTexture()->origin());
+ this->addTextureAccess(&fDstCopy);
+ }
+}
+
+void GrXferProcessor::getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const {
+ uint32_t key = this->willReadDstColor() ? 0x1 : 0x0;
+ 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()) {
+ if (!caps.dstReadInShaderSupport()) {
+ SkASSERT(dstCopy && dstCopy->texture());
+ } else {
+ SkASSERT(!dstCopy || !dstCopy->texture());
+ }
+ } else {
+ SkASSERT(!dstCopy || !dstCopy->texture());
+
+ }
+#endif
+ return this->onCreateXferProcessor(colorPOI, coveragePOI, dstCopy);
+}
+
+bool GrXPFactory::willNeedDstCopy(const GrDrawTargetCaps& caps) const {
+ return (this->willReadDstColor() && !caps.dstReadInShaderSupport());
+}
+
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