Continue making Ganesh use absolute texture coordinates - take 2

The idea here is that the GrCoordTransform will actually hold a GrTextureProxy (rather than a GrTexture) and then, in GrGLSLPrimitiveProcessor::GetTransformMatrix, use the instantiated width & height (when uploading the transform matrix)

Relanding of: https://skia-review.googlesource.com/c/6977/


Change-Id: Ibc9b9e354f7fc23b1a6e6e4fe7c9fe3cef771c02
Reviewed-on: https://skia-review.googlesource.com/7265
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/gpu/GrTextureMaker.h b/src/gpu/GrTextureMaker.h
index 0ea5f6d009..767d4ffa3b 100644
--- a/src/gpu/GrTextureMaker.h
+++ b/src/gpu/GrTextureMaker.h
@@ -19,10 +19,12 @@ public:
     /**
      *  Returns a texture that is safe for use with the params. If the size of the returned texture
      *  does not match width()/height() then the contents of the original must be scaled to fit
-     *  the texture. Places the color space of the texture in (*texColorSpace).
+     *  the texture. Additionally, the 'scaleAdjust' must be applied to the texture matrix
+     *  in order to correct the absolute texture coordinates.
+     *  Places the color space of the texture in (*texColorSpace).
      */
     GrTexture* refTextureForParams(const GrSamplerParams&, SkColorSpace* dstColorSpace,
-                                   sk_sp<SkColorSpace>* texColorSpace);
+                                   sk_sp<SkColorSpace>* texColorSpace, SkScalar scaleAdjust[2]);
 
     sk_sp<GrFragmentProcessor> createFragmentProcessor(
                                 const SkMatrix& textureMatrix,