Remove the remainder of the skia source code from the Chromium repo....

skia/images/SkScaledBitmapSampler.cpp

Index: skia/images/SkScaledBitmapSampler.cpp
===================================================================
--- skia/images/SkScaledBitmapSampler.cpp	(revision 16859)
+++ skia/images/SkScaledBitmapSampler.cpp	(working copy)
@@ -1,338 +0,0 @@
-/*
- * Copyright 2007, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); 
- * you may not use this file except in compliance with the License. 
- * You may obtain a copy of the License at 
- *
- *     http://www.apache.org/licenses/LICENSE-2.0 
- *
- * Unless required by applicable law or agreed to in writing, software 
- * distributed under the License is distributed on an "AS IS" BASIS, 
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
- * See the License for the specific language governing permissions and 
- * limitations under the License.
- */
-
-#include "SkScaledBitmapSampler.h"
-#include "SkBitmap.h"
-#include "SkColorPriv.h"
-#include "SkDither.h"
-
-// 8888
-
-static bool Sample_Gray_D8888(void* SK_RESTRICT dstRow,
-                              const uint8_t* SK_RESTRICT src,
-                              int width, int deltaSrc, int) {
-    SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow;
-    for (int x = 0; x < width; x++) {
-        dst[x] = SkPackARGB32(0xFF, src[0], src[0], src[0]);
-        src += deltaSrc;
-    }
-    return false;
-}
-
-static bool Sample_RGBx_D8888(void* SK_RESTRICT dstRow,
-                              const uint8_t* SK_RESTRICT src,
-                              int width, int deltaSrc, int) {
-    SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow;
-    for (int x = 0; x < width; x++) {
-        dst[x] = SkPackARGB32(0xFF, src[0], src[1], src[2]);
-        src += deltaSrc;
-    }
-    return false;
-}
-
-static bool Sample_RGBA_D8888(void* SK_RESTRICT dstRow,
-                              const uint8_t* SK_RESTRICT src,
-                              int width, int deltaSrc, int) {
-    SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow;
-    unsigned alphaMask = 0xFF;
-    for (int x = 0; x < width; x++) {
-        unsigned alpha = src[3];
-        dst[x] = SkPreMultiplyARGB(alpha, src[0], src[1], src[2]);
-        src += deltaSrc;
-        alphaMask &= alpha;
-    }
-    return alphaMask != 0xFF;
-}
-
-// 565
-
-static bool Sample_Gray_D565(void* SK_RESTRICT dstRow,
-                             const uint8_t* SK_RESTRICT src,
-                             int width, int deltaSrc, int) {
-    uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow;
-    for (int x = 0; x < width; x++) {
-        dst[x] = SkPack888ToRGB16(src[0], src[0], src[0]);
-        src += deltaSrc;
-    }
-    return false;
-}
-
-static bool Sample_Gray_D565_D(void* SK_RESTRICT dstRow,
-                               const uint8_t* SK_RESTRICT src,
-                               int width, int deltaSrc, int y) {
-    uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow;
-    DITHER_565_SCAN(y);
-    for (int x = 0; x < width; x++) {
-        dst[x] = SkDitherRGBTo565(src[0], src[0], src[0], DITHER_VALUE(x));
-        src += deltaSrc;
-    }
-    return false;
-}
-
-static bool Sample_RGBx_D565(void* SK_RESTRICT dstRow,
-                             const uint8_t* SK_RESTRICT src,
-                             int width, int deltaSrc, int) {
-    uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow;
-    for (int x = 0; x < width; x++) {
-        dst[x] = SkPack888ToRGB16(src[0], src[1], src[2]);
-        src += deltaSrc;
-    }
-    return false;
-}
-
-static bool Sample_RGBx_D565_D(void* SK_RESTRICT dstRow,
-                               const uint8_t* SK_RESTRICT src,
-                               int width, int deltaSrc, int y) {
-    uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow;
-    DITHER_565_SCAN(y);
-    for (int x = 0; x < width; x++) {
-        dst[x] = SkDitherRGBTo565(src[0], src[1], src[2], DITHER_VALUE(x));
-        src += deltaSrc;
-    }
-    return false;
-}
-
-// 4444
-
-static bool Sample_Gray_D4444(void* SK_RESTRICT dstRow,
-                              const uint8_t* SK_RESTRICT src,
-                              int width, int deltaSrc, int) {
-    SkPMColor16* SK_RESTRICT dst = (SkPMColor16*)dstRow;
-    for (int x = 0; x < width; x++) {
-        unsigned gray = src[0] >> 4;
-        dst[x] = SkPackARGB4444(0xF, gray, gray, gray);
-        src += deltaSrc;
-    }
-    return false;
-}
-
-static bool Sample_Gray_D4444_D(void* SK_RESTRICT dstRow,
-                                const uint8_t* SK_RESTRICT src,
-                                int width, int deltaSrc, int y) {
-    SkPMColor16* SK_RESTRICT dst = (SkPMColor16*)dstRow;
-    DITHER_4444_SCAN(y);
-    for (int x = 0; x < width; x++) {
-        dst[x] = SkDitherARGB32To4444(0xFF, src[0], src[0], src[0],
-                                      DITHER_VALUE(x));
-        src += deltaSrc;
-    }
-    return false;
-}
-
-static bool Sample_RGBx_D4444(void* SK_RESTRICT dstRow,
-                              const uint8_t* SK_RESTRICT src,
-                              int width, int deltaSrc, int) {
-    SkPMColor16* SK_RESTRICT dst = (SkPMColor16*)dstRow;
-    for (int x = 0; x < width; x++) {
-        dst[x] = SkPackARGB4444(0xF, src[0] >> 4, src[1] >> 4, src[2] >> 4);
-        src += deltaSrc;
-    }
-    return false;
-}
-
-static bool Sample_RGBx_D4444_D(void* SK_RESTRICT dstRow,
-                                const uint8_t* SK_RESTRICT src,
-                                int width, int deltaSrc, int y) {
-    SkPMColor16* dst = (SkPMColor16*)dstRow;
-    DITHER_4444_SCAN(y);
-
-    for (int x = 0; x < width; x++) {
-        dst[x] = SkDitherARGB32To4444(0xFF, src[0], src[1], src[2],
-                                      DITHER_VALUE(x));
-        src += deltaSrc;
-    }
-    return false;
-}
-
-static bool Sample_RGBA_D4444(void* SK_RESTRICT dstRow,
-                              const uint8_t* SK_RESTRICT src,
-                              int width, int deltaSrc, int) {
-    SkPMColor16* SK_RESTRICT dst = (SkPMColor16*)dstRow;
-    unsigned alphaMask = 0xFF;
-
-    for (int x = 0; x < width; x++) {
-        unsigned alpha = src[3];
-        SkPMColor c = SkPreMultiplyARGB(alpha, src[0], src[1], src[2]);
-        dst[x] = SkPixel32ToPixel4444(c);
-        src += deltaSrc;
-        alphaMask &= alpha;
-    }
-    return alphaMask != 0xFF;
-}
-
-static bool Sample_RGBA_D4444_D(void* SK_RESTRICT dstRow,
-                                const uint8_t* SK_RESTRICT src,
-                                int width, int deltaSrc, int y) {
-    SkPMColor16* SK_RESTRICT dst = (SkPMColor16*)dstRow;
-    unsigned alphaMask = 0xFF;
-    DITHER_4444_SCAN(y);
-
-    for (int x = 0; x < width; x++) {
-        unsigned alpha = src[3];
-        SkPMColor c = SkPreMultiplyARGB(alpha, src[0], src[1], src[2]);
-        dst[x] = SkDitherARGB32To4444(c, DITHER_VALUE(x));
-        src += deltaSrc;
-        alphaMask &= alpha;
-    }
-    return alphaMask != 0xFF;
-}
-
-// Index
-
-static bool Sample_Index_DI(void* SK_RESTRICT dstRow,
-                            const uint8_t* SK_RESTRICT src,
-                            int width, int deltaSrc, int) {
-    if (1 == deltaSrc) {
-        memcpy(dstRow, src, width);
-    } else {
-        uint8_t* SK_RESTRICT dst = (uint8_t*)dstRow;
-        for (int x = 0; x < width; x++) {
-            dst[x] = src[0];
-            src += deltaSrc;
-        }
-    }
-    return false;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-#include "SkScaledBitmapSampler.h"
-
-SkScaledBitmapSampler::SkScaledBitmapSampler(int width, int height,
-                                             int sampleSize) {
-    if (width <= 0 || height <= 0) {
-        sk_throw();
-    }
-    
-    if (sampleSize <= 1) {
-        fScaledWidth = width;
-        fScaledHeight = height;
-        fX0 = fY0 = 0;
-        fDX = fDY = 1;
-        return;
-    }
-    
-    int dx = SkMin32(sampleSize, width);
-    int dy = SkMin32(sampleSize, height);
-    
-    fScaledWidth = width / dx;
-    fScaledHeight = height / dy;
-    
-    SkASSERT(fScaledWidth > 0);
-    SkASSERT(fScaledHeight > 0);
-    
-    fX0 = dx >> 1;
-    fY0 = dy >> 1;
-    
-    SkASSERT(fX0 >= 0 && fX0 < width);
-    SkASSERT(fY0 >= 0 && fY0 < height);
-    
-    fDX = dx;
-    fDY = dy;
-    
-    SkASSERT(fDX > 0 && (fX0 + fDX * (fScaledWidth - 1)) < width);
-    SkASSERT(fDY > 0 && (fY0 + fDY * (fScaledHeight - 1)) < height);
-    
-    fRowProc = NULL;
-}
-
-bool SkScaledBitmapSampler::begin(SkBitmap* dst, SrcConfig sc, bool dither) {
-    static const RowProc gProcs[] = {
-        // 8888 (no dither distinction)
-        Sample_Gray_D8888,  Sample_Gray_D8888,
-        Sample_RGBx_D8888,  Sample_RGBx_D8888,
-        Sample_RGBA_D8888,  Sample_RGBA_D8888,
-        NULL,               NULL,
-        // 565 (no alpha distinction)
-        Sample_Gray_D565,   Sample_Gray_D565_D,
-        Sample_RGBx_D565,   Sample_RGBx_D565_D,
-        Sample_RGBx_D565,   Sample_RGBx_D565_D,
-        NULL,               NULL,
-        // 4444
-        Sample_Gray_D4444,  Sample_Gray_D4444_D,
-        Sample_RGBx_D4444,  Sample_RGBx_D4444_D,
-        Sample_RGBA_D4444,  Sample_RGBA_D4444_D,
-        NULL,               NULL,
-        // Index8
-        NULL,               NULL,
-        NULL,               NULL,
-        NULL,               NULL,
-        Sample_Index_DI,    Sample_Index_DI,
-    };
-
-    
-    int index = 0;
-    if (dither) {
-        index += 1;
-    }
-    switch (sc) {
-        case SkScaledBitmapSampler::kGray:
-            fSrcPixelSize = 1;
-            index += 0;
-            break;
-        case SkScaledBitmapSampler::kRGB:
-            fSrcPixelSize = 3;
-            index += 2;
-            break;
-        case SkScaledBitmapSampler::kRGBX:
-            fSrcPixelSize = 4;
-            index += 2;
-            break;
-        case SkScaledBitmapSampler::kRGBA:
-            fSrcPixelSize = 4;
-            index += 4;
-            break;
-        case SkScaledBitmapSampler::kIndex:
-            fSrcPixelSize = 1;
-            index += 6;
-            break;
-        default:
-            return false;
-    }
-
-    switch (dst->config()) {
-        case SkBitmap::kARGB_8888_Config:
-            index += 0;
-            break;
-        case SkBitmap::kRGB_565_Config:
-            index += 8;
-            break;
-        case SkBitmap::kARGB_4444_Config:
-            index += 16;
-            break;
-        case SkBitmap::kIndex8_Config:
-            index += 24;
-            break;
-        default:
-            return false;
-    }
-    
-    fRowProc = gProcs[index];
-    fDstRow = (char*)dst->getPixels();
-    fDstRowBytes = dst->rowBytes();
-    fCurrY = 0;
-    return fRowProc != NULL;
-}
-
-bool SkScaledBitmapSampler::next(const uint8_t* SK_RESTRICT src) {
-    SkASSERT((unsigned)fCurrY < (unsigned)fScaledHeight);
-
-    bool hadAlpha = fRowProc(fDstRow, src + fX0 * fSrcPixelSize, fScaledWidth,
-                             fDX * fSrcPixelSize, fCurrY);
-    fDstRow += fDstRowBytes;
-    fCurrY += 1;
-    return hadAlpha;
-}