Creating functions for uploading a mipmapped texture.

src/gpu/GrSurface.cpp

Index: src/gpu/GrSurface.cpp
diff --git a/src/gpu/GrSurface.cpp b/src/gpu/GrSurface.cpp
index a7be0f47d96cdb890c159623843e6c861a9face5..9ba89831498e578e6ab1e19d1a40202db4e88e79 100644
--- a/src/gpu/GrSurface.cpp
+++ b/src/gpu/GrSurface.cpp
@@ -92,17 +92,34 @@ bool GrSurfacePriv::AdjustWritePixelParams(int surfaceWidth,
 //////////////////////////////////////////////////////////////////////////////
 
 bool GrSurface::writePixels(int left, int top, int width, int height,
-                            GrPixelConfig config, const void* buffer, size_t rowBytes,
+                            GrPixelConfig config, const SkTArray<SkMipMapLevel>& texels,
                             uint32_t pixelOpsFlags) {
     // go through context so that all necessary flushing occurs
     GrContext* context = this->getContext();
     if (nullptr == context) {
         return false;
     }
-    return context->writeSurfacePixels(this, left, top, width, height, config, buffer, rowBytes,
+    return context->writeSurfacePixels(this, left, top, width, height, config, texels,
                                        pixelOpsFlags);
 }
 
+bool GrSurface::writePixels(int left, int top, int width, int height,
+                            GrPixelConfig config, const void* buffer, size_t rowBytes,
+                            uint32_t pixelOpsFlags) {
+    if (width < 0 || height < 0) {

[bsalomon, 2015/09/30 18:01:29]

<= 0?

[cblume, 2015/10/08 09:27:57]

Done.

+        return nullptr;

[bsalomon, 2015/09/30 18:01:29]

false rather than nullptr

[cblume, 2015/10/08 09:27:57]

Done.

+    }
+    const uint32_t baseLevelWidth = width;
+    const uint32_t baseLevelHeight = height;
+
+    SkMipMapLevel level(buffer, rowBytes, baseLevelWidth, baseLevelHeight);

[bsalomon, 2015/09/30 18:01:29]

This doesn't copy the buffer, right?

[cblume, 2015/10/08 09:27:57]

Correct. SkMipMapLevel only does a shallow copy of the pointer, not a deep copy
of the contents.

+    const int levelCount = 1;
+    SkTArray<SkMipMapLevel> texels(levelCount);
+    texels.push_back(level);
+
+    return this->writePixels(left, top, width, height, config, texels, pixelOpsFlags);
+}
+
 bool GrSurface::readPixels(int left, int top, int width, int height,
                            GrPixelConfig config, void* buffer, size_t rowBytes,
                            uint32_t pixelOpsFlags) {