Working plumb of image scaling:

src/core/SkBitmapProcState_matrix.h

 
 /*
  * 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 "SkMath.h"
 #include "SkMathPriv.h"
@@ skipping 37 matching lines @@
     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
                              SkMatrix::kScale_Mask)) == 0);
 
     PREAMBLE(s);
     // we store y, x, x, x, x, x
 
     const unsigned maxX = s.fBitmap->width() - 1;
     SkFractionalInt fx;
     {
         SkPoint pt;
-        s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
+        s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
                                   SkIntToScalar(y) + SK_ScalarHalf, &pt);
         fx = SkScalarToFractionalInt(pt.fY);
         const unsigned maxY = s.fBitmap->height() - 1;
         *xy++ = TILEY_PROCF(SkFractionalIntToFixed(fx), maxY);
         fx = SkScalarToFractionalInt(pt.fX);
     }
 
     if (0 == maxX) {
         // all of the following X values must be 0
         memset(xy, 0, count * sizeof(uint16_t));
@@ skipping 40 matching lines @@
 
 void AFFINE_NOFILTER_NAME(const SkBitmapProcState& s,
                                  uint32_t xy[], int count, int x, int y) {
     SkASSERT(s.fInvType & SkMatrix::kAffine_Mask);
     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
                              SkMatrix::kScale_Mask |
                              SkMatrix::kAffine_Mask)) == 0);
 
     PREAMBLE(s);
     SkPoint srcPt;
-    s.fInvProc(*s.fInvMatrix,
+    s.fInvProc(s.fInvMatrix,
                SkIntToScalar(x) + SK_ScalarHalf,
                SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
 
     SkFractionalInt fx = SkScalarToFractionalInt(srcPt.fX);
     SkFractionalInt fy = SkScalarToFractionalInt(srcPt.fY);
     SkFractionalInt dx = s.fInvSxFractionalInt;
     SkFractionalInt dy = s.fInvKyFractionalInt;
     int maxX = s.fBitmap->width() - 1;
     int maxY = s.fBitmap->height() - 1;
 
     for (int i = count; i > 0; --i) {
         *xy++ = (TILEY_PROCF(SkFractionalIntToFixed(fy), maxY) << 16) |
                  TILEX_PROCF(SkFractionalIntToFixed(fx), maxX);
         fx += dx; fy += dy;
     }
 }
 
 void PERSP_NOFILTER_NAME(const SkBitmapProcState& s,
                                 uint32_t* SK_RESTRICT xy,
                                 int count, int x, int y) {
     SkASSERT(s.fInvType & SkMatrix::kPerspective_Mask);
 
     PREAMBLE(s);
     int maxX = s.fBitmap->width() - 1;
     int maxY = s.fBitmap->height() - 1;
 
-    SkPerspIter   iter(*s.fInvMatrix,
+    SkPerspIter   iter(s.fInvMatrix,
                        SkIntToScalar(x) + SK_ScalarHalf,
                        SkIntToScalar(y) + SK_ScalarHalf, count);
 
     while ((count = iter.next()) != 0) {
         const SkFixed* SK_RESTRICT srcXY = iter.getXY();
         while (--count >= 0) {
             *xy++ = (TILEY_PROCF(srcXY[1], maxY) << 16) |
                      TILEX_PROCF(srcXY[0], maxX);
             srcXY += 2;
         }
@@ skipping 24 matching lines @@
 
     PREAMBLE(s);
 
     const unsigned maxX = s.fBitmap->width() - 1;
     const SkFixed one = s.fFilterOneX;
     const SkFractionalInt dx = s.fInvSxFractionalInt;
     SkFractionalInt fx;
 
     {
         SkPoint pt;
-        s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
+        s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
                                   SkIntToScalar(y) + SK_ScalarHalf, &pt);
         const SkFixed fy = SkScalarToFixed(pt.fY) - (s.fFilterOneY >> 1);
         const unsigned maxY = s.fBitmap->height() - 1;
         // compute our two Y values up front
         *xy++ = PACK_FILTER_Y_NAME(fy, maxY, s.fFilterOneY PREAMBLE_ARG_Y);
         // now initialize fx
         fx = SkScalarToFractionalInt(pt.fX) - (SkFixedToFractionalInt(one) >> 1);
     }
 
 #ifdef CHECK_FOR_DECAL
@@ skipping 13 matching lines @@
 
 void AFFINE_FILTER_NAME(const SkBitmapProcState& s,
                                uint32_t xy[], int count, int x, int y) {
     SkASSERT(s.fInvType & SkMatrix::kAffine_Mask);
     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
                              SkMatrix::kScale_Mask |
                              SkMatrix::kAffine_Mask)) == 0);
 
     PREAMBLE(s);
     SkPoint srcPt;
-    s.fInvProc(*s.fInvMatrix,
+    s.fInvProc(s.fInvMatrix,
                SkIntToScalar(x) + SK_ScalarHalf,
                SkIntToScalar(y) + SK_ScalarHalf, &srcPt);
 
     SkFixed oneX = s.fFilterOneX;
     SkFixed oneY = s.fFilterOneY;
     SkFixed fx = SkScalarToFixed(srcPt.fX) - (oneX >> 1);
     SkFixed fy = SkScalarToFixed(srcPt.fY) - (oneY >> 1);
     SkFixed dx = s.fInvSx;
     SkFixed dy = s.fInvKy;
     unsigned maxX = s.fBitmap->width() - 1;
@@ skipping 11 matching lines @@
                               uint32_t* SK_RESTRICT xy, int count,
                               int x, int y) {
     SkASSERT(s.fInvType & SkMatrix::kPerspective_Mask);
 
     PREAMBLE(s);
     unsigned maxX = s.fBitmap->width() - 1;
     unsigned maxY = s.fBitmap->height() - 1;
     SkFixed oneX = s.fFilterOneX;
     SkFixed oneY = s.fFilterOneY;
 
-    SkPerspIter   iter(*s.fInvMatrix,
+    SkPerspIter   iter(s.fInvMatrix,
                        SkIntToScalar(x) + SK_ScalarHalf,
                        SkIntToScalar(y) + SK_ScalarHalf, count);
 
     while ((count = iter.next()) != 0) {
         const SkFixed* SK_RESTRICT srcXY = iter.getXY();
         do {
             *xy++ = PACK_FILTER_Y_NAME(srcXY[1] - (oneY >> 1), maxY,
                                        oneY PREAMBLE_ARG_Y);
             *xy++ = PACK_FILTER_X_NAME(srcXY[0] - (oneX >> 1), maxX,
                                        oneX PREAMBLE_ARG_X);
@@ skipping 26 matching lines @@
 #undef PERSP_FILTER_NAME
 
 #undef PREAMBLE
 #undef PREAMBLE_PARAM_X
 #undef PREAMBLE_PARAM_Y
 #undef PREAMBLE_ARG_X
 #undef PREAMBLE_ARG_Y
 
 #undef TILEX_LOW_BITS
 #undef TILEY_LOW_BITS