Index: src/gpu/GrXferProcessor.cpp |
diff --git a/src/gpu/GrXferProcessor.cpp b/src/gpu/GrXferProcessor.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e2d714208f525129ae9aa8984e8f0bd77dfe88d7 |
--- /dev/null |
+++ b/src/gpu/GrXferProcessor.cpp |
@@ -0,0 +1,74 @@ |
+/* |
+ * 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" |
+ |
+// Interpretation of DstReadKey when generating code |
+enum { |
+ kNoDstRead_DstReadKey = 0, |
+ kYesDstRead_DstReadKeyBit = 0x1, // Set if we read the dst. |
+ kDstCopyRead_DstReadKeyBit = 0x2, // Set if we use a dst-copy-read. |
+ kTopLeftOrigin_DstReadKeyBit = 0x4, // Set if dst-copy origin is top-left. |
bsalomon
2015/01/30 14:59:15
canonicalize on always tl or bl?
egdaniel
2015/02/03 16:47:44
Done.
|
+}; |
+ |
+/////////////////////////////////////////////////////////////////////////////// |
+ |
+GrXferProcessor::GrXferProcessor() : fWillReadDstColor(false), fDstReadKey(kNoDstRead_DstReadKey) { |
+} |
+ |
+GrXferProcessor::GrXferProcessor(const GrDeviceCoordTexture* dstCopy, int32_t dstReadKey) |
+ : fWillReadDstColor(false) |
+ , fDstReadKey(dstReadKey) { |
+ if (dstCopy && dstCopy->texture()) { |
+ SkASSERT(kDstCopyRead_DstReadKeyBit & fDstReadKey); |
+ fDstCopy.reset(dstCopy->texture()); |
+ fOffset = dstCopy->offset(); |
+ this->addTextureAccess(&fDstCopy); |
+ } |
+} |
+ |
+void GrXferProcessor::getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const { |
+ b->add32(fDstReadKey); |
+ this->onGetGLProcessorKey(caps, b); |
+} |
+ |
+bool GrXferProcessor::hasDstCopy() const { |
+ return (kDstCopyRead_DstReadKeyBit & fDstReadKey); |
+} |
+ |
+bool GrXferProcessor::dstCopyIsTopDown() const { |
+ return (kTopLeftOrigin_DstReadKeyBit & fDstReadKey); |
+} |
+ |
+/////////////////////////////////////////////////////////////////////////////// |
+ |
+GrXferProcessor* GrXPFactory::createXferProcessor(const GrProcOptInfo& colorPOI, |
+ const GrProcOptInfo& coveragePOI, |
+ const GrDeviceCoordTexture* dstCopy, |
+ const GrDrawTargetCaps& caps) const { |
+ int32_t dstReadKey; |
+ if (this->willReadDst()) { |
+ dstReadKey = kYesDstRead_DstReadKeyBit; |
+ if (!caps.dstReadInShaderSupport()) { |
+ SkASSERT(dstCopy->texture()); |
+ dstReadKey |= kDstCopyRead_DstReadKeyBit; |
+ if (kTopLeft_GrSurfaceOrigin == dstCopy->texture()->origin()) { |
+ dstReadKey |= kTopLeftOrigin_DstReadKeyBit; |
+ } |
+ } |
+ } else { |
+ dstReadKey = kNoDstRead_DstReadKey; |
+ |
+ } |
+ return this->onCreateXferProcessor(colorPOI, coveragePOI, dstCopy, dstReadKey); |
+} |
+ |
+bool GrXPFactory::willNeedDstCopy(const GrDrawTargetCaps& caps) const { |
+ return (this->willReadDst() && !caps.dstReadInShaderSupport()); |
+} |
+ |