add blitprocs to shaders
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1793883002
Review URL: https://codereview.chromium.org/1793883002
diff --git a/include/core/SkShader.h b/include/core/SkShader.h
index 8002f63..39ffd86 100644
--- a/include/core/SkShader.h
+++ b/include/core/SkShader.h
@@ -142,6 +142,18 @@
virtual void shadeSpan4f(int x, int y, SkPM4f[], int count);
+ struct BlitState {
+ Context* fCtx;
+ SkXfermode* fXfer;
+ enum { N = 2 };
+ void* fStorage[N];
+ };
+ typedef void (*BlitProc)(BlitState*,
+ int x, int y, const SkPixmap&, int count, const SkAlpha[]);
+ BlitProc chooseBlitProc(const SkImageInfo& info, BlitState* state) {
+ return this->onChooseBlitProc(info, state);
+ }
+
/**
* The const void* ctx is only const because all the implementations are const.
* This can be changed to non-const if a new shade proc needs to change the ctx.
@@ -175,6 +187,11 @@
const SkMatrix& getTotalInverse() const { return fTotalInverse; }
MatrixClass getInverseClass() const { return (MatrixClass)fTotalInverseClass; }
const SkMatrix& getCTM() const { return fCTM; }
+
+ virtual BlitProc onChooseBlitProc(const SkImageInfo&, BlitState*) {
+ return nullptr;
+ }
+
private:
SkMatrix fCTM;
SkMatrix fTotalInverse;