Start on new GPU pixel ops implementation.

The new ops attempt to be less optimal by falling back to CPU conversions
rather than relying on intermediate draws and complex coordination between
GrContext and GrGpu to determine how conversions are performed.

This adds the new writePixels implementation.

Change-Id: I7496d86d5a40277ed2ca63668881c160e54d80d3
Reviewed-on: https://skia-review.googlesource.com/109880
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/src/gpu/GrContextPriv.h b/src/gpu/GrContextPriv.h
index a26d15d26d..a2a45b5007 100644
--- a/src/gpu/GrContextPriv.h
+++ b/src/gpu/GrContextPriv.h
@@ -147,13 +147,16 @@ public:
                            size_t rowBytes = 0, uint32_t pixelOpsFlags = 0);
 
     /**
-     * Writes a rectangle of pixels to a surface.
+     * Writes a rectangle of pixels to a surface. There are currently two versions of this.
+     * writeSurfacePixels() is the older version which will be replaced by the more robust and
+     * maintainable (but perhaps slower) writeSurfacePixels2().
+     *
      * @param dst           the surface context to write to.
      * @param left          left edge of the rectangle to write (inclusive)
      * @param top           top edge of the rectangle to write (inclusive)
      * @param width         width of rectangle to write in pixels.
      * @param height        height of rectangle to write in pixels.
-     * @param srcConfig     the pixel config of the source buffer
+     * @param srcColorType  the color type of the source buffer
      * @param srcColorSpace color space of the source buffer
      * @param buffer        memory to read pixels from
      * @param rowBytes      number of bytes between consecutive rows. Zero
@@ -165,6 +168,9 @@ public:
     bool writeSurfacePixels(GrSurfaceContext* dst, int left, int top, int width, int height,
                             GrColorType srcColorType, SkColorSpace* srcColorSpace,
                             const void* buffer, size_t rowBytes, uint32_t pixelOpsFlags = 0);
+    bool writeSurfacePixels2(GrSurfaceContext* dst, int left, int top, int width, int height,
+                             GrColorType srcColorType, SkColorSpace* srcColorSpace,
+                             const void* buffer, size_t rowBytes, uint32_t pixelOpsFlags = 0);
 
     GrBackend getBackend() const { return fContext->fBackend; }