Refactor helper function for SkBitmapShader to GrFragmentProcessor
BUG=skia:
Review URL: https://codereview.chromium.org/1285283002
diff --git a/src/gpu/SkGr.cpp b/src/gpu/SkGr.cpp
index 9aa7961..53f640b 100644
--- a/src/gpu/SkGr.cpp
+++ b/src/gpu/SkGr.cpp
@@ -21,6 +21,7 @@
#include "SkResourceCache.h"
#include "SkTextureCompressor.h"
#include "SkYUVPlanesCache.h"
+#include "effects/GrBicubicEffect.h"
#include "effects/GrDitherEffect.h"
#include "effects/GrPorterDuffXferProcessor.h"
#include "effects/GrYUVtoRGBEffect.h"
@@ -835,3 +836,45 @@
dst->setInfo(info);
dst->setPixelRef(SkNEW_ARGS(SkGrPixelRef, (info, src)))->unref();
}
+
+GrTextureParams::FilterMode GrSkFilterQualityToGrFilterMode(SkFilterQuality paintFilterQuality,
+ const SkMatrix& viewM,
+ const SkMatrix& localM,
+ bool* doBicubic) {
+ *doBicubic = false;
+ GrTextureParams::FilterMode textureFilterMode;
+ switch (paintFilterQuality) {
+ case kNone_SkFilterQuality:
+ textureFilterMode = GrTextureParams::kNone_FilterMode;
+ break;
+ case kLow_SkFilterQuality:
+ textureFilterMode = GrTextureParams::kBilerp_FilterMode;
+ break;
+ case kMedium_SkFilterQuality: {
+ SkMatrix matrix;
+ matrix.setConcat(viewM, localM);
+ if (matrix.getMinScale() < SK_Scalar1) {
+ textureFilterMode = GrTextureParams::kMipMap_FilterMode;
+ } else {
+ // Don't trigger MIP level generation unnecessarily.
+ textureFilterMode = GrTextureParams::kBilerp_FilterMode;
+ }
+ break;
+ }
+ case kHigh_SkFilterQuality: {
+ SkMatrix matrix;
+ matrix.setConcat(viewM, localM);
+ *doBicubic = GrBicubicEffect::ShouldUseBicubic(matrix, &textureFilterMode);
+ break;
+ }
+ default:
+ 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;
+}