Create special surfaces according to original device (not always in N32)

src/core/SkSpecialImage.cpp

Index: src/core/SkSpecialImage.cpp
diff --git a/src/core/SkSpecialImage.cpp b/src/core/SkSpecialImage.cpp
index 240d46921947e450a8f6592ac75c060e6fffb340..010bd1844f57be2ec5f6af91ccb195760dfeea5b 100644
--- a/src/core/SkSpecialImage.cpp
+++ b/src/core/SkSpecialImage.cpp
@@ -52,11 +52,14 @@ public:
 
     virtual sk_sp<SkSpecialImage> onMakeSubset(const SkIRect& subset) const = 0;
 
-    virtual sk_sp<SkSpecialSurface> onMakeSurface(const SkImageInfo& info) const = 0;
+    virtual sk_sp<SkSpecialSurface> onMakeSurface(const SkImageFilter::OutputProperties& outProps,
+                                                  const SkISize& size, SkAlphaType at) const = 0;
 
     virtual sk_sp<SkImage> onMakeTightSubset(const SkIRect& subset) const = 0;
 
-    virtual sk_sp<SkSurface> onMakeTightSurface(const SkImageInfo& info) const = 0;
+    virtual sk_sp<SkSurface> onMakeTightSurface(const SkImageFilter::OutputProperties& outProps,
+                                                const SkISize& size,

[robertphillips, 2016/09/23 14:11:28]

Do we need the default parameter here ?

+                                                SkAlphaType at = kPremul_SkAlphaType) const = 0;
 
 private:
     typedef SkSpecialImage INHERITED;
@@ -151,12 +154,15 @@ sk_sp<GrTexture> SkSpecialImage::asTextureRef(GrContext* context) const {
 }
 #endif
 
-sk_sp<SkSpecialSurface> SkSpecialImage::makeSurface(const SkImageInfo& info) const {
-    return as_SIB(this)->onMakeSurface(info);
+sk_sp<SkSpecialSurface> SkSpecialImage::makeSurface(const SkImageFilter::OutputProperties& outProps,
+                                                    const SkISize& size, SkAlphaType at) const {
+    return as_SIB(this)->onMakeSurface(outProps, size, at);
 }
 
-sk_sp<SkSurface> SkSpecialImage::makeTightSurface(const SkImageInfo& info) const {
-    return as_SIB(this)->onMakeTightSurface(info);
+sk_sp<SkSurface> SkSpecialImage::makeTightSurface(const SkImageFilter::OutputProperties& outProps,
+                                                  const SkISize& size,
+                                                  SkAlphaType at) const {
+    return as_SIB(this)->onMakeTightSurface(outProps, size, at);
 }
 
 sk_sp<SkSpecialImage> SkSpecialImage::makeSubset(const SkIRect& subset) const {
@@ -252,7 +258,22 @@ public:
     }
 #endif
 
-    sk_sp<SkSpecialSurface> onMakeSurface(const SkImageInfo& info) const override {
+// TODO: The raster implementations of image filters all currently assume that the pixels are
+// legacy N32. Until they actually check the format and operate on sRGB or F16 data appropriately,
+// we can't enable this. (They will continue to produce incorrect results, but less-so).
+#define RASTER_IMAGE_FILTERS_SUPPORT_SRGB_AND_F16 0
+
+    sk_sp<SkSpecialSurface> onMakeSurface(const SkImageFilter::OutputProperties& outProps,
+                                          const SkISize& size, SkAlphaType at) const override {
+#if RASTER_IMAGE_FILTERS_SUPPORT_SRGB_AND_F16
+        SkColorSpace* colorSpace = outProps.colorSpace();
+#else
+        SkColorSpace* colorSpace = nullptr;
+#endif
+        SkColorType colorType = colorSpace && colorSpace->gammaIsLinear()
+            ? kRGBA_F16_SkColorType : kN32_SkColorType;
+        SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), colorType, at,
+                                             sk_ref_sp(colorSpace));
         return SkSpecialSurface::MakeRaster(info, nullptr);
     }
 
@@ -278,7 +299,18 @@ public:
         return SkImage::MakeFromBitmap(subsetBM);
     }
 
-    sk_sp<SkSurface> onMakeTightSurface(const SkImageInfo& info) const override {
+    sk_sp<SkSurface> onMakeTightSurface(const SkImageFilter::OutputProperties& outProps,
+                                        const SkISize& size,
+                                        SkAlphaType at = kPremul_SkAlphaType) const override {
+#if RASTER_IMAGE_FILTERS_SUPPORT_SRGB_AND_F16
+        SkColorSpace* colorSpace = outProps.colorSpace();
+#else
+        SkColorSpace* colorSpace = nullptr;
+#endif
+        SkColorType colorType = colorSpace && colorSpace->gammaIsLinear()
+            ? kRGBA_F16_SkColorType : kN32_SkColorType;
+        SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), colorType, at,
+                                             sk_ref_sp(colorSpace));
         return SkSurface::MakeRaster(info);
     }
 
@@ -382,16 +414,16 @@ public:
         return fColorSpace.get();
     }
 
-    sk_sp<SkSpecialSurface> onMakeSurface(const SkImageInfo& info) const override {
+    sk_sp<SkSpecialSurface> onMakeSurface(const SkImageFilter::OutputProperties& outProps,
+                                          const SkISize& size, SkAlphaType at) const override {
         if (!fTexture->getContext()) {
             return nullptr;
         }
 
-        GrPixelConfig config = SkImageInfo2GrPixelConfig(info, *fTexture->getContext()->caps());
-
-        return SkSpecialSurface::MakeRenderTarget(fTexture->getContext(),
-                                                  info.width(), info.height(),
-                                                  config, sk_ref_sp(info.colorSpace()));
+        SkColorSpace* colorSpace = outProps.colorSpace();
+        return SkSpecialSurface::MakeRenderTarget(
+            fTexture->getContext(), size.width(), size.height(),
+            GrRenderableConfigForColorSpace(colorSpace), sk_ref_sp(colorSpace));
     }
 
     sk_sp<SkSpecialImage> onMakeSubset(const SkIRect& subset) const override {
@@ -428,7 +460,14 @@ public:
                                        fAlphaType, subTx.get(), fColorSpace, SkBudgeted::kYes);
     }
 
-    sk_sp<SkSurface> onMakeTightSurface(const SkImageInfo& info) const override {
+    sk_sp<SkSurface> onMakeTightSurface(const SkImageFilter::OutputProperties& outProps,
+                                        const SkISize& size,
+                                        SkAlphaType at = kPremul_SkAlphaType) const override {
+        SkColorSpace* colorSpace = outProps.colorSpace();
+        SkColorType colorType = colorSpace && colorSpace->gammaIsLinear()
+            ? kRGBA_F16_SkColorType : kRGBA_8888_SkColorType;
+        SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), colorType, at,
+                                             sk_ref_sp(colorSpace));
         return SkSurface::MakeRenderTarget(fTexture->getContext(), SkBudgeted::kYes, info);
     }