Creating functions for uploading a mipmapped texture.

src/gpu/GrTexture.cpp

Index: src/gpu/GrTexture.cpp
diff --git a/src/gpu/GrTexture.cpp b/src/gpu/GrTexture.cpp
index 7984460545db61d3b5dfb8c6120f24719e909365..d06459943ced933df440f0990393d2204374af83 100644
--- a/src/gpu/GrTexture.cpp
+++ b/src/gpu/GrTexture.cpp
@@ -14,11 +14,12 @@
 #include "GrRenderTargetPriv.h"
 #include "GrTexture.h"
 #include "GrTexturePriv.h"
+#include "SkFloatingPoint.h"
 
 void GrTexture::dirtyMipMaps(bool mipMapsDirty) {
     if (mipMapsDirty) {
         if (kValid_MipMapsStatus == fMipMapsStatus) {
-           fMipMapsStatus = kAllocated_MipMapsStatus;
+            fMipMapsStatus = kAllocated_MipMapsStatus;
         }
     } else {
         const bool sizeChanged = kNotAllocated_MipMapsStatus == fMipMapsStatus;
@@ -82,8 +83,7 @@ GrSurfaceOrigin resolve_origin(const GrSurfaceDesc& desc) {
 
 //////////////////////////////////////////////////////////////////////////////
 GrTexture::GrTexture(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc)
-    : INHERITED(gpu, lifeCycle, desc)
-    , fMipMapsStatus(kNotAllocated_MipMapsStatus) {
+    : INHERITED(gpu, lifeCycle, desc) {
 
     if (!this->isExternal() && !GrPixelConfigIsCompressed(desc.fConfig)) {
         GrScratchKey key;
@@ -93,23 +93,29 @@ GrTexture::GrTexture(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc)
     // only make sense if alloc size is pow2
     fShiftFixedX = 31 - SkCLZ(fDesc.fWidth);
     fShiftFixedY = 31 - SkCLZ(fDesc.fHeight);
+    if (desc.fIsMipMapped) {
+        fMipMapsStatus = kAllocated_MipMapsStatus;
+    } else {
+        fMipMapsStatus = kNotAllocated_MipMapsStatus;
+    }
 }
 
 void GrTexturePriv::ComputeScratchKey(const GrSurfaceDesc& desc, GrScratchKey* key) {
     static const GrScratchKey::ResourceType kType = GrScratchKey::GenerateResourceType();
 
-    GrScratchKey::Builder builder(key, kType, 2);
-
     GrSurfaceOrigin origin = resolve_origin(desc);
     uint32_t flags = desc.fFlags & ~kCheckAllocation_GrSurfaceFlag;
 
-    SkASSERT(desc.fWidth <= SK_MaxU16);
-    SkASSERT(desc.fHeight <= SK_MaxU16);
-    SkASSERT(static_cast<int>(desc.fConfig) < (1 << 6));
+    // make sure desc.fConfig fits in 5 bits
+    SkASSERT(sk_float_log2(kLast_GrPixelConfig) <= 5);
+    SkASSERT(static_cast<int>(desc.fConfig) < (1 << 5));
     SkASSERT(desc.fSampleCnt < (1 << 8));
     SkASSERT(flags < (1 << 10));
     SkASSERT(static_cast<int>(origin) < (1 << 8));
 
-    builder[0] = desc.fWidth | (desc.fHeight << 16);
-    builder[1] = desc.fConfig | (desc.fSampleCnt << 6) | (flags << 14) | (origin << 24);
+    GrScratchKey::Builder builder(key, kType, 3);
+    builder[0] = desc.fWidth;
+    builder[1] = desc.fHeight;
+    builder[2] = desc.fConfig | desc.fIsMipMapped << 5 | (desc.fSampleCnt << 6) | (flags << 14)
+                 | (origin << 24);
 }