make the filter mode for GrTextureAccess an enum so we can plumb down

src/gpu/SkGpuDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuDevice.h"
 
 #include "effects/GrTextureDomainEffect.h"
 #include "effects/GrSimpleTextureEffect.h"
 
 #include "GrContext.h"
 #include "GrTextContext.h"
 
 #include "SkGrTexturePixelRef.h"
 
 #include "SkColorFilter.h"
 #include "SkDeviceImageFilterProxy.h"
 #include "SkDrawProcs.h"
 #include "SkGlyphCache.h"
 #include "SkImageFilter.h"
 #include "SkPathEffect.h"
 #include "SkRRect.h"
 #include "SkStroke.h"
 #include "SkUtils.h"
+#include "SkErrorInternals.h"
 
 #define CACHE_COMPATIBLE_DEVICE_TEXTURES 1
 
 #if 0
     extern bool (*gShouldDrawProc)();
     #define CHECK_SHOULD_DRAW(draw, forceI)                     \
         do {                                                    \
             if (gShouldDrawProc && !gShouldDrawProc()) return;  \
             this->prepareDraw(draw, forceI);                    \
         } while (0)
@@ skipping 1090 matching lines @@
         drawMatrix.setConcat(fContext->getMatrix(), newM);
         SkDraw transformedDraw(draw);
         transformedDraw.fMatrix = &drawMatrix;
 
         this->drawRect(transformedDraw, srcRect, paintWithTexture);
 
         return;
     }
 
     GrTextureParams params;
-    params.setBilerp(paint.isFilterBitmap());
+    SkPaint::FilterLevel paintFilterLevel = paint.getFilterLevel();
+    GrTextureParams::FilterMode textureFilterMode;
+    switch(paintFilterLevel) {
+        case SkPaint::kNone_FilterLevel:
+            textureFilterMode = GrTextureParams::kNone_FilterMode;
+            break;
+        case SkPaint::kLow_FilterLevel:
+            textureFilterMode = GrTextureParams::kBilerp_FilterMode;
+            break;
+        case SkPaint::kMedium_FilterLevel:
+            textureFilterMode = GrTextureParams::kMipMap_FilterMode;
+            break;
+        case SkPaint::kHigh_FilterLevel:
+            SkErrorInternals::SetError( kInvalidPaint_SkError,
+                                        "Sorry, I don't yet support high quality "
+                                        "filtering on the GPU.  Falling back to "
+                                        "MIPMaps.");
+            textureFilterMode = GrTextureParams::kMipMap_FilterMode;
+            break;
+    }
+    
+    params.setFilterMode(textureFilterMode);
 
     if (!this->shouldTileBitmap(bitmap, params, srcRectPtr)) {
         // take the simple case
         this->internalDrawBitmap(bitmap, srcRect, m, params, paint);
     } else {
         this->drawTiledBitmap(bitmap, srcRect, m, params, paint);
     }
 }
 
 // Break 'bitmap' into several tiles to draw it since it has already
@@ skipping 123 matching lines @@
     SkRect dstRect(srcRect);
     SkRect paintRect;
     SkScalar wInv = SkScalarInvert(SkIntToScalar(bitmap.width()));
     SkScalar hInv = SkScalarInvert(SkIntToScalar(bitmap.height()));
     paintRect.setLTRB(SkScalarMul(srcRect.fLeft,   wInv),
                       SkScalarMul(srcRect.fTop,    hInv),
                       SkScalarMul(srcRect.fRight,  wInv),
                       SkScalarMul(srcRect.fBottom, hInv));
 
     bool needsTextureDomain = false;
-    if (params.isBilerp()) {
+    if (params.filterMode() != GrTextureParams::kNone_FilterMode) {
         // Need texture domain if drawing a sub rect.
         needsTextureDomain = srcRect.width() < bitmap.width() ||
                              srcRect.height() < bitmap.height();
         if (needsTextureDomain && m.rectStaysRect() && fContext->getMatrix().rectStaysRect()) {
             // sampling is axis-aligned
             SkRect transformedRect;
             SkMatrix srcToDeviceMatrix(m);
             srcToDeviceMatrix.postConcat(fContext->getMatrix());
             srcToDeviceMatrix.mapRect(&transformedRect, srcRect);
 
@@ skipping 24 matching lines @@
             top = paintRect.top() + border;
             bottom = paintRect.bottom() - border;
         } else {
             top = bottom = SkScalarHalf(paintRect.top() + paintRect.bottom());
         }
         textureDomain.setLTRB(left, top, right, bottom);
         effect.reset(GrTextureDomainEffect::Create(texture,
                                                    SkMatrix::I(),
                                                    textureDomain,
                                                    GrTextureDomainEffect::kClamp_WrapMode,
-                                                   params.isBilerp()));
+                                                   params.filterMode()));
     } else {
         effect.reset(GrSimpleTextureEffect::Create(texture, SkMatrix::I(), params));
     }
 
     // Construct a GrPaint by setting the bitmap texture as the first effect and then configuring
     // the rest from the SkPaint.
     GrPaint grPaint;
     grPaint.addColorEffect(effect);
     bool alphaOnly = !(SkBitmap::kA8_Config == bitmap.config());
     if (!skPaint2GrPaintNoShader(this, paint, alphaOnly, false, &grPaint)) {
@@ skipping 417 matching lines @@
                          GrTexture* texture,
                          bool needClear)
     : SkDevice(make_bitmap(context, texture->asRenderTarget())) {
 
     GrAssert(texture && texture->asRenderTarget());
     // This constructor is called from onCreateCompatibleDevice. It has locked the RT in the texture
     // cache. We pass true for the third argument so that it will get unlocked.
     this->initFromRenderTarget(context, texture->asRenderTarget(), true);
     fNeedClear = needClear;
 }