Creating functions for uploading a mipmapped texture.

src/gpu/GrTextureProvider.cpp

Index: src/gpu/GrTextureProvider.cpp
diff --git a/src/gpu/GrTextureProvider.cpp b/src/gpu/GrTextureProvider.cpp
index 26384abbd2ad5bcd93ca65203631035a16d18334..47007a9834a7e788251fb2f5d57716bfc4d96cd3 100644
--- a/src/gpu/GrTextureProvider.cpp
+++ b/src/gpu/GrTextureProvider.cpp
@@ -1,4 +1,3 @@
-
 /*
  * Copyright 2015 Google Inc.
  *
@@ -18,7 +17,7 @@ enum ScratchTextureFlags {
 };
 
 GrTexture* GrTextureProvider::createTexture(const GrSurfaceDesc& desc, bool budgeted,
-                                            const void* srcData, size_t rowBytes) {
+                                            const SkTArray<SkMipMapLevel>& texels) {
     if (this->isAbandoned()) {
         return nullptr;
     }
@@ -30,8 +29,8 @@ GrTexture* GrTextureProvider::createTexture(const GrSurfaceDesc& desc, bool budg
         static const uint32_t kFlags = kExact_ScratchTextureFlag |
                                        kNoCreate_ScratchTextureFlag;
         if (GrTexture* texture = this->refScratchTexture(desc, kFlags)) {
-            if (!srcData || texture->writePixels(0, 0, desc.fWidth, desc.fHeight, desc.fConfig,
-                                                 srcData, rowBytes)) {
+            if (texture->writePixels(0, 0, desc.fWidth, desc.fHeight, desc.fConfig,
+                                     texels)) {
                 if (!budgeted) {
                     texture->resourcePriv().makeUnbudgeted();
                 }
@@ -40,7 +39,25 @@ GrTexture* GrTextureProvider::createTexture(const GrSurfaceDesc& desc, bool budg
             texture->unref();
         }
     }
-    return fGpu->createTexture(desc, budgeted, srcData, rowBytes);
+    return fGpu->createTexture(desc, budgeted, texels);
+}
+
+GrTexture* GrTextureProvider::createTexture(const GrSurfaceDesc& desc, bool budgeted,
+                                            const void* srcData, size_t rowBytes) {
+    const int height = desc.fHeight;
+    const int width = desc.fWidth;
+    if (height < 0 || width < 0) {
+        return nullptr;
+    }
+    const uint32_t baseLevelHeight = height;
+    const uint32_t baseLevelWidth = width;
+
+    SkMipMapLevel level(srcData, rowBytes, baseLevelWidth, baseLevelHeight);
+    const int mipLevelCount = 1;
+    SkTArray<SkMipMapLevel> texels(mipLevelCount);
+    texels.push_back(level);
+
+    return this->createTexture(desc, budgeted, texels);
 }
 
 GrTexture* GrTextureProvider::createApproxTexture(const GrSurfaceDesc& desc) {