allow more options for shader blitprocs
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1810383004
Review URL: https://codereview.chromium.org/1810383004
diff --git a/include/core/SkShader.h b/include/core/SkShader.h
index 39ffd86..c9c760d 100644
--- a/include/core/SkShader.h
+++ b/include/core/SkShader.h
@@ -142,18 +142,35 @@
virtual void shadeSpan4f(int x, int y, SkPM4f[], int count);
+ struct BlitState;
+ typedef void (*BlitBW)(BlitState*,
+ int x, int y, const SkPixmap&, int count);
+ typedef void (*BlitAA)(BlitState*,
+ int x, int y, const SkPixmap&, int count, const SkAlpha[]);
+
struct BlitState {
+ // inputs
Context* fCtx;
SkXfermode* fXfer;
+
+ // outputs
enum { N = 2 };
void* fStorage[N];
+ BlitBW fBlitBW;
+ BlitAA fBlitAA;
};
- 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);
+
+ // Returns true if one or more of the blitprocs are set in the BlitState
+ bool chooseBlitProcs(const SkImageInfo& info, BlitState* state) {
+ state->fBlitBW = nullptr;
+ state->fBlitAA = nullptr;
+ if (this->onChooseBlitProcs(info, state)) {
+ SkASSERT(state->fBlitBW || state->fBlitAA);
+ return true;
+ }
+ return false;
}
-
+
/**
* 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.
@@ -188,9 +205,7 @@
MatrixClass getInverseClass() const { return (MatrixClass)fTotalInverseClass; }
const SkMatrix& getCTM() const { return fCTM; }
- virtual BlitProc onChooseBlitProc(const SkImageInfo&, BlitState*) {
- return nullptr;
- }
+ virtual bool onChooseBlitProcs(const SkImageInfo&, BlitState*) { return false; }
private:
SkMatrix fCTM;