Always supply a color space (sRGB for now) with F16

src/gpu/SkGr.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkGr.h"
 #include "SkGrPriv.h"
@@ skipping 225 matching lines @@
 }
 
 GrTexture* GrUploadPixmapToTexture(GrContext* ctx, const SkPixmap& pixmap, SkBudgeted budgeted) {
     const SkPixmap* pmap = &pixmap;
     SkPixmap tmpPixmap;
     SkBitmap tmpBitmap;
 
     const GrCaps* caps = ctx->caps();
     GrSurfaceDesc desc = GrImageInfoToSurfaceDesc(pixmap.info(), *caps);
 
-    if (caps->srgbSupport() && !GrPixelConfigIsSRGB(desc.fConfig) &&
-        pixmap.info().colorSpace() && pixmap.info().colorSpace()->gammaCloseToSRGB()) {
+    if (caps->srgbSupport() &&
+        pixmap.info().colorSpace() && pixmap.info().colorSpace()->gammaCloseToSRGB() &&
+        !(GrPixelConfigIsSRGB(desc.fConfig) ||
+          kRGBA_half_GrPixelConfig == desc.fConfig ||
+          kRGBA_float_GrPixelConfig == desc.fConfig)) {
         // We were supplied an sRGB-like color space, but we don't have a suitable pixel config.
         // Convert to 8888 sRGB so we can handle the data correctly. The raster backend doesn't
         // handle sRGB Index8 -> sRGB 8888 correctly (yet), so lie about both the source and
         // destination (claim they're linear):
         SkImageInfo linSrcInfo = SkImageInfo::Make(pixmap.width(), pixmap.height(),
                                                    pixmap.colorType(), pixmap.alphaType());
         SkPixmap linSrcPixmap(linSrcInfo, pixmap.addr(), pixmap.rowBytes(), pixmap.ctable());
 
         SkImageInfo dstInfo = SkImageInfo::Make(pixmap.width(), pixmap.height(),
                                                 kN32_SkColorType, kPremul_SkAlphaType,
@@ skipping 511 matching lines @@
             SkErrorInternals::SetError( kInvalidPaint_SkError,
                                         "Sorry, I don't understand the filtering "
                                         "mode you asked for.  Falling back to "
                                         "MIPMaps.");
             textureFilterMode = GrTextureParams::kMipMap_FilterMode;
             break;
 
     }
     return textureFilterMode;
 }