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 382550e41fc43f512600a844758002984ab76fbf..f266915058a4341d0a837fbaf5d463c5f6376160 100644
--- a/src/gpu/GrSurface.cpp
+++ b/src/gpu/GrSurface.cpp
@@ -93,17 +93,35 @@ 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) {
+    // make sure the size's range fits within the texelmap's size range
+    if (width <= 0 || height <= 0) {
+        return false;
+    }
+    const uint32_t baseLevelWidth = width;
+    const uint32_t baseLevelHeight = height;
+
+    SkMipMapLevel level(buffer, rowBytes, baseLevelWidth, baseLevelHeight);
+    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) {