Implement support for origin-TopLeft render targets in GL backend.

Review URL: https://codereview.appspot.com/7230049

git-svn-id: http://skia.googlecode.com/svn/trunk@7545 2bbb7eff-a529-9590-31e7-b0007b416f81

4 files changed, 15 insertions, 15 deletions

diff --git a/include/gpu/GrRenderTarget.h b/include/gpu/GrRenderTarget.h
index 19a37a5d8b..fcb4c3d3b1 100644
--- a/include/gpu/GrRenderTarget.h
+++ b/include/gpu/GrRenderTarget.h
@@ -141,9 +141,8 @@ protected:
     GrRenderTarget(GrGpu* gpu,
                    bool isWrapped,
                    GrTexture* texture,
-                   const GrTextureDesc& desc,
-                   GrSurfaceOrigin origin)
-        : INHERITED(gpu, isWrapped, desc, origin)
+                   const GrTextureDesc& desc)
+        : INHERITED(gpu, isWrapped, desc)
         , fStencilBuffer(NULL)
         , fTexture(texture) {
         fResolveRect.setLargestInverted();
diff --git a/include/gpu/GrSurface.h b/include/gpu/GrSurface.h
index 3429cc6d80..02fc0d5dea 100644
--- a/include/gpu/GrSurface.h
+++ b/include/gpu/GrSurface.h
@@ -34,8 +34,8 @@ public:
     int height() const { return fDesc.fHeight; }
 
     GrSurfaceOrigin origin() const {
-        GrAssert(kTopLeft_GrSurfaceOrigin == fOrigin || kBottomLeft_GrSurfaceOrigin == fOrigin);
-        return fOrigin;
+        GrAssert(kTopLeft_GrSurfaceOrigin == fDesc.fOrigin || kBottomLeft_GrSurfaceOrigin == fDesc.fOrigin);
+        return fDesc.fOrigin;
     }
 
     /**
@@ -104,17 +104,14 @@ public:
                              uint32_t pixelOpsFlags = 0) = 0;
 
 protected:
-    GrSurface(GrGpu* gpu, bool isWrapped, const GrTextureDesc& desc, GrSurfaceOrigin origin)
+    GrSurface(GrGpu* gpu, bool isWrapped, const GrTextureDesc& desc)
     : INHERITED(gpu, isWrapped)
-    , fDesc(desc)
-    , fOrigin(origin) {
+    , fDesc(desc) {
     }
 
     GrTextureDesc fDesc;
 
 private:
-    GrSurfaceOrigin fOrigin;
-
     typedef GrResource INHERITED;
 };
 
diff --git a/include/gpu/GrTexture.h b/include/gpu/GrTexture.h
index 94d578894b..c088bdd582 100644
--- a/include/gpu/GrTexture.h
+++ b/include/gpu/GrTexture.h
@@ -140,8 +140,8 @@ protected:
                                    // base class cons sets to NULL
                                    // subclass cons can create and set
 
-    GrTexture(GrGpu* gpu, bool isWrapped, const GrTextureDesc& desc, GrSurfaceOrigin origin)
-    : INHERITED(gpu, isWrapped, desc, origin)
+    GrTexture(GrGpu* gpu, bool isWrapped, const GrTextureDesc& desc)
+    : INHERITED(gpu, isWrapped, desc)
     , fRenderTarget(NULL) {
 
         // only make sense if alloc size is pow2
diff --git a/include/gpu/GrTypes.h b/include/gpu/GrTypes.h
index 055750dd11..88c5771cbf 100644
--- a/include/gpu/GrTypes.h
+++ b/include/gpu/GrTypes.h
@@ -428,13 +428,14 @@ enum {
 /**
  * Some textures will be stored such that the upper and left edges of the content meet at the
  * the origin (in texture coord space) and for other textures the lower and left edges meet at
- * the origin. Render-targets are always consistent with the convention of the underlying
- * backend API to make it easier to mix native backend rendering with Skia rendering.
+ * the origin. kDefault_GrSurfaceOrigin sets textures to TopLeft, and render targets
+ * to BottomLeft.
  */
 
 enum GrSurfaceOrigin {
-    kBottomLeft_GrSurfaceOrigin,
+    kDefault_GrSurfaceOrigin,
     kTopLeft_GrSurfaceOrigin,
+    kBottomLeft_GrSurfaceOrigin,
 };
 
 /**
@@ -443,6 +444,7 @@ enum GrSurfaceOrigin {
 struct GrTextureDesc {
     GrTextureDesc()
     : fFlags(kNone_GrTextureFlags)
+    , fOrigin(kDefault_GrSurfaceOrigin)
     , fWidth(0)
     , fHeight(0)
     , fConfig(kUnknown_GrPixelConfig)
@@ -450,6 +452,7 @@ struct GrTextureDesc {
     }
 
     GrTextureFlags         fFlags;  //!< bitfield of TextureFlags
+    GrSurfaceOrigin        fOrigin; //!< origin of the texture
     int                    fWidth;  //!< Width of the texture
     int                    fHeight; //!< Height of the texture
 
@@ -640,6 +643,7 @@ struct GrBackendRenderTargetDesc {
     int                             fWidth;         //<! width in pixels
     int                             fHeight;        //<! height in pixels
     GrPixelConfig                   fConfig;        //<! color format
+    GrSurfaceOrigin                 fOrigin;        //<! pixel origin
     /**
      * The number of samples per pixel. Gr uses this to influence decisions
      * about applying other forms of anti-aliasing.