Revert "[PDF] Add unpremultiply support and a GM."
This reverts commit f746273b8ba282f548a6eaffb45b11b6f468aa8e.
Review URL: https://codereview.chromium.org/29343002
git-svn-id: http://skia.googlecode.com/svn/trunk/src@11858 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/pdf/SkPDFImage.cpp b/pdf/SkPDFImage.cpp
index 78f1f6d..19ad79e 100644
--- a/pdf/SkPDFImage.cpp
+++ b/pdf/SkPDFImage.cpp
@@ -336,157 +336,6 @@
return result;
}
-/**
- * Removes the alpha component of an ARGB color (including unpremultiply) while
- * keeping the output in the same format as the input.
- */
-static uint32_t remove_alpha_argb8888(uint32_t pmColor) {
- SkColor color = SkUnPreMultiply::PMColorToColor(pmColor);
- return SkPackARGB32NoCheck(SK_AlphaOPAQUE,
- SkColorGetR(color),
- SkColorGetG(color),
- SkColorGetB(color));
-}
-
-static uint16_t remove_alpha_argb4444(uint16_t pmColor) {
- return SkPixel32ToPixel4444(
- remove_alpha_argb8888(SkPixel4444ToPixel32(pmColor)));
-}
-
-static uint32_t get_argb8888_neighbor_avg_color(const SkBitmap& bitmap,
- int xOrig, int yOrig) {
- uint8_t count = 0;
- uint16_t r = 0;
- uint16_t g = 0;
- uint16_t b = 0;
-
- for (int y = yOrig - 1; y <= yOrig + 1; y++) {
- if (y < 0 || y >= bitmap.height()) {
- continue;
- }
- uint32_t* src = bitmap.getAddr32(0, y);
- for (int x = xOrig - 1; x <= xOrig + 1; x++) {
- if (x < 0 || x >= bitmap.width()) {
- continue;
- }
- if (SkGetPackedA32(src[x]) != SK_AlphaTRANSPARENT) {
- uint32_t color = remove_alpha_argb8888(src[x]);
- r += SkGetPackedR32(color);
- g += SkGetPackedG32(color);
- b += SkGetPackedB32(color);
- count++;
- }
- }
- }
-
- if (count == 0) {
- return SkPackARGB32NoCheck(SK_AlphaOPAQUE, 0, 0, 0);
- } else {
- return SkPackARGB32NoCheck(SK_AlphaOPAQUE,
- r / count, g / count, b / count);
- }
-}
-
-static uint16_t get_argb4444_neighbor_avg_color(const SkBitmap& bitmap,
- int xOrig, int yOrig) {
- uint8_t count = 0;
- uint8_t r = 0;
- uint8_t g = 0;
- uint8_t b = 0;
-
- for (int y = yOrig - 1; y <= yOrig + 1; y++) {
- if (y < 0 || y >= bitmap.height()) {
- continue;
- }
- uint16_t* src = bitmap.getAddr16(0, y);
- for (int x = xOrig - 1; x <= xOrig + 1; x++) {
- if (x < 0 || x >= bitmap.width()) {
- continue;
- }
- if ((SkGetPackedA4444(src[x]) & 0x0F) != SK_AlphaTRANSPARENT) {
- uint16_t color = remove_alpha_argb4444(src[x]);
- r += SkGetPackedR4444(color);
- g += SkGetPackedG4444(color);
- b += SkGetPackedB4444(color);
- count++;
- }
- }
- }
-
- if (count == 0) {
- return SkPackARGB4444(SK_AlphaOPAQUE & 0x0F, 0, 0, 0);
- } else {
- return SkPackARGB4444(SK_AlphaOPAQUE & 0x0F,
- r / count, g / count, b / count);
- }
-}
-
-static SkBitmap unpremultiply_bitmap(const SkBitmap& bitmap,
- const SkIRect& srcRect) {
- SkBitmap outBitmap;
- outBitmap.setConfig(bitmap.config(), srcRect.width(), srcRect.height());
- SkASSERT(outBitmap.allocPixels());
- size_t dstRow = 0;
-
- outBitmap.lockPixels();
- bitmap.lockPixels();
- switch (bitmap.config()) {
- case SkBitmap::kARGB_4444_Config: {
- for (int y = srcRect.fTop; y < srcRect.fBottom; y++) {
- uint16_t* dst = outBitmap.getAddr16(0, dstRow);
- uint16_t* src = bitmap.getAddr16(0, y);
- for (int x = srcRect.fLeft; x < srcRect.fRight; x++) {
- uint8_t a = SkGetPackedA4444(src[x]);
- // It is necessary to average the color component of
- // transparent pixels with their surrounding neighbors
- // since the PDF renderer may separately re-sample the
- // alpha and color channels when the image is not
- // displayed at its native resolution. Since an alpha of
- // zero gives no information about the color component,
- // the pathological case is a white image with sharp
- // transparency bounds - the color channel goes to black,
- // and the should-be-transparent pixels are rendered
- // as grey because of the separate soft mask and color
- // resizing.
- if (a == (SK_AlphaTRANSPARENT & 0x0F)) {
- *dst = get_argb4444_neighbor_avg_color(bitmap, x, y);
- } else {
- *dst = remove_alpha_argb4444(src[x]);
- }
- dst++;
- }
- dstRow++;
- }
- break;
- }
- case SkBitmap::kARGB_8888_Config: {
- for (int y = srcRect.fTop; y < srcRect.fBottom; y++) {
- uint32_t* dst = outBitmap.getAddr32(0, dstRow);
- uint32_t* src = bitmap.getAddr32(0, y);
- for (int x = srcRect.fLeft; x < srcRect.fRight; x++) {
- uint8_t a = SkGetPackedA32(src[x]);
- if (a == SK_AlphaTRANSPARENT) {
- *dst = get_argb8888_neighbor_avg_color(bitmap, x, y);
- } else {
- *dst = remove_alpha_argb8888(src[x]);
- }
- dst++;
- }
- dstRow++;
- }
- break;
- }
- default:
- SkASSERT(false);
- }
- bitmap.unlockPixels();
- outBitmap.unlockPixels();
-
- outBitmap.setImmutable();
-
- return outBitmap;
-}
-
// static
SkPDFImage* SkPDFImage::CreateImage(const SkBitmap& bitmap,
const SkIRect& srcRect,
@@ -509,16 +358,8 @@
return NULL;
}
- SkPDFImage* image;
- SkBitmap::Config config = bitmap.config();
- if (alphaData.get() != NULL && (config == SkBitmap::kARGB_8888_Config ||
- config == SkBitmap::kARGB_4444_Config)) {
- SkBitmap unpremulBitmap = unpremultiply_bitmap(bitmap, srcRect);
- image = SkNEW_ARGS(SkPDFImage, (NULL, unpremulBitmap, false, NULL,
- encoder));
- } else {
- image = SkNEW_ARGS(SkPDFImage, (NULL, bitmap, false, srcRect, encoder));
- }
+ SkPDFImage* image = SkNEW_ARGS(SkPDFImage, (NULL, bitmap,
+ false, srcRect, encoder));
if (alphaData.get() != NULL) {
SkAutoTUnref<SkPDFImage> mask(
SkNEW_ARGS(SkPDFImage, (alphaData.get(), bitmap,
