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Unified Diff: src/codec/SkMaskSwizzler.cpp

Issue 1013743003: Adding premul and 565 swizzles for bmp: (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Removed bytesRead param, build color table on stack Created 5 years, 9 months ago
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Index: src/codec/SkMaskSwizzler.cpp
diff --git a/src/codec/SkMaskSwizzler.cpp b/src/codec/SkMaskSwizzler.cpp
index 8d9f6c66b3ac007e955118b872d244b52614ea3b..9f3d50fe44c9827f7958e199774b7a352f5411b0 100644
--- a/src/codec/SkMaskSwizzler.cpp
+++ b/src/codec/SkMaskSwizzler.cpp
@@ -9,12 +9,7 @@
#include "SkColorPriv.h"
#include "SkMaskSwizzler.h"
-/*
- *
- * Row procedure for masked color components with 16 bits per pixel
- *
- */
-static SkSwizzler::ResultAlpha swizzle_mask16_to_n32(
+static SkSwizzler::ResultAlpha swizzle_mask16_to_n32_opaque(
void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
// Use the masks to decode to the destination
@@ -30,12 +25,7 @@ static SkSwizzler::ResultAlpha swizzle_mask16_to_n32(
return SkSwizzler::kOpaque_ResultAlpha;
}
-/*
- *
- * Row procedure for masked color components with 16 bits per pixel with alpha
- *
- */
-static SkSwizzler::ResultAlpha swizzle_mask16_alpha_to_n32(
+static SkSwizzler::ResultAlpha swizzle_mask16_to_n32_unpremul(
void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
// Use the masks to decode to the destination
@@ -54,12 +44,42 @@ static SkSwizzler::ResultAlpha swizzle_mask16_alpha_to_n32(
return COMPUTE_RESULT_ALPHA;
}
-/*
- *
- * Row procedure for masked color components with 24 bits per pixel
- *
- */
-static SkSwizzler::ResultAlpha swizzle_mask24_to_n32(
+static SkSwizzler::ResultAlpha swizzle_mask16_to_n32_premul(
+ void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
+
+ // Use the masks to decode to the destination
+ uint16_t* srcPtr = (uint16_t*) srcRow;
+ SkPMColor* dstPtr = (SkPMColor*) dstRow;
+ INIT_RESULT_ALPHA;
+ for (int i = 0; i < width; i++) {
+ uint16_t p = srcPtr[i];
+ uint8_t red = masks->getRed(p);
+ uint8_t green = masks->getGreen(p);
+ uint8_t blue = masks->getBlue(p);
+ uint8_t alpha = masks->getAlpha(p);
+ UPDATE_RESULT_ALPHA(alpha);
+ dstPtr[i] = SkPreMultiplyARGB(alpha, red, green, blue);
+ }
+ return COMPUTE_RESULT_ALPHA;
+}
+
+static SkSwizzler::ResultAlpha swizzle_mask16_to_565(
+ void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
+
+ // Use the masks to decode to the destination
+ uint16_t* srcPtr = (uint16_t*) srcRow;
+ uint16_t* dstPtr = (uint16_t*) dstRow;
+ for (int i = 0; i < width; i++) {
+ uint16_t p = srcPtr[i];
+ uint8_t red = masks->getRed(p);
+ uint8_t green = masks->getGreen(p);
+ uint8_t blue = masks->getBlue(p);
+ dstPtr[i] = SkPack888ToRGB16(red, green, blue);
+ }
+ return SkSwizzler::kOpaque_ResultAlpha;
+}
+
+static SkSwizzler::ResultAlpha swizzle_mask24_to_n32_opaque(
void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
// Use the masks to decode to the destination
@@ -74,12 +94,7 @@ static SkSwizzler::ResultAlpha swizzle_mask24_to_n32(
return SkSwizzler::kOpaque_ResultAlpha;
}
-/*
- *
- * Row procedure for masked color components with 24 bits per pixel with alpha
- *
- */
-static SkSwizzler::ResultAlpha swizzle_mask24_alpha_to_n32(
+static SkSwizzler::ResultAlpha swizzle_mask24_to_n32_unpremul(
void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
// Use the masks to decode to the destination
@@ -97,12 +112,40 @@ static SkSwizzler::ResultAlpha swizzle_mask24_alpha_to_n32(
return COMPUTE_RESULT_ALPHA;
}
-/*
- *
- * Row procedure for masked color components with 32 bits per pixel
- *
- */
-static SkSwizzler::ResultAlpha swizzle_mask32_to_n32(
+static SkSwizzler::ResultAlpha swizzle_mask24_to_n32_premul(
+ void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
+
+ // Use the masks to decode to the destination
+ SkPMColor* dstPtr = (SkPMColor*) dstRow;
+ INIT_RESULT_ALPHA;
+ for (int i = 0; i < 3*width; i += 3) {
+ uint32_t p = srcRow[i] | (srcRow[i + 1] << 8) | srcRow[i + 2] << 16;
+ uint8_t red = masks->getRed(p);
+ uint8_t green = masks->getGreen(p);
+ uint8_t blue = masks->getBlue(p);
+ uint8_t alpha = masks->getAlpha(p);
+ UPDATE_RESULT_ALPHA(alpha);
+ dstPtr[i/3] = SkPreMultiplyARGB(alpha, red, green, blue);
+ }
+ return COMPUTE_RESULT_ALPHA;
+}
+
+static SkSwizzler::ResultAlpha swizzle_mask24_to_565(
+ void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
+
+ // Use the masks to decode to the destination
+ uint16_t* dstPtr = (uint16_t*) dstRow;
+ for (int i = 0; i < 3*width; i += 3) {
+ uint32_t p = srcRow[i] | (srcRow[i + 1] << 8) | srcRow[i + 2] << 16;
+ uint8_t red = masks->getRed(p);
+ uint8_t green = masks->getGreen(p);
+ uint8_t blue = masks->getBlue(p);
+ dstPtr[i/3] = SkPack888ToRGB16(red, green, blue);
+ }
+ return SkSwizzler::kOpaque_ResultAlpha;
+}
+
+static SkSwizzler::ResultAlpha swizzle_mask32_to_n32_opaque(
void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
// Use the masks to decode to the destination
@@ -118,12 +161,7 @@ static SkSwizzler::ResultAlpha swizzle_mask32_to_n32(
return SkSwizzler::kOpaque_ResultAlpha;
}
-/*
- *
- * Row procedure for masked color components with 32 bits per pixel
- *
- */
-static SkSwizzler::ResultAlpha swizzle_mask32_alpha_to_n32(
+static SkSwizzler::ResultAlpha swizzle_mask32_to_n32_unpremul(
void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
// Use the masks to decode to the destination
@@ -142,44 +180,147 @@ static SkSwizzler::ResultAlpha swizzle_mask32_alpha_to_n32(
return COMPUTE_RESULT_ALPHA;
}
+static SkSwizzler::ResultAlpha swizzle_mask32_to_n32_premul(
+ void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
+
+ // Use the masks to decode to the destination
+ uint32_t* srcPtr = (uint32_t*) srcRow;
+ SkPMColor* dstPtr = (SkPMColor*) dstRow;
+ INIT_RESULT_ALPHA;
+ for (int i = 0; i < width; i++) {
+ uint32_t p = srcPtr[i];
+ uint8_t red = masks->getRed(p);
+ uint8_t green = masks->getGreen(p);
+ uint8_t blue = masks->getBlue(p);
+ uint8_t alpha = masks->getAlpha(p);
+ UPDATE_RESULT_ALPHA(alpha);
+ dstPtr[i] = SkPreMultiplyARGB(alpha, red, green, blue);
+ }
+ return COMPUTE_RESULT_ALPHA;
+}
+
+static SkSwizzler::ResultAlpha swizzle_mask32_to_565(
+ void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks) {
+
+ // Use the masks to decode to the destination
+ uint32_t* srcPtr = (uint32_t*) srcRow;
+ uint16_t* dstPtr = (uint16_t*) dstRow;
+ for (int i = 0; i < width; i++) {
+ uint32_t p = srcPtr[i];
+ uint8_t red = masks->getRed(p);
+ uint8_t green = masks->getGreen(p);
+ uint8_t blue = masks->getBlue(p);
+ dstPtr[i] = SkPack888ToRGB16(red, green, blue);
+ }
+ return SkSwizzler::kOpaque_ResultAlpha;
+}
+
/*
*
* Create a new mask swizzler
*
*/
SkMaskSwizzler* SkMaskSwizzler::CreateMaskSwizzler(
- const SkImageInfo& imageInfo, SkMasks* masks, uint32_t bitsPerPixel) {
+ const SkImageInfo& info, SkMasks* masks, uint32_t bitsPerPixel) {
// Choose the appropriate row procedure
RowProc proc = NULL;
- uint32_t alphaMask = masks->getAlphaMask();
switch (bitsPerPixel) {
case 16:
- if (0 == alphaMask) {
- proc = &swizzle_mask16_to_n32;
- } else {
- proc = &swizzle_mask16_alpha_to_n32;
+ switch (info.colorType()) {
+ case kN32_SkColorType:
+ switch (info.alphaType()) {
+ case kUnpremul_SkAlphaType:
+ proc = &swizzle_mask16_to_n32_unpremul;
+ break;
+ case kPremul_SkAlphaType:
+ proc = &swizzle_mask16_to_n32_premul;
+ break;
+ case kOpaque_SkAlphaType:
+ proc = &swizzle_mask16_to_n32_opaque;
+ break;
+ default:
+ break;
+ }
+ break;
+ case kRGB_565_SkColorType:
+ switch (info.alphaType()) {
+ case kOpaque_SkAlphaType:
+ proc = &swizzle_mask16_to_565;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
}
break;
case 24:
- if (0 == alphaMask) {
- proc = &swizzle_mask24_to_n32;
- } else {
- proc = &swizzle_mask24_alpha_to_n32;
+ switch (info.colorType()) {
+ case kN32_SkColorType:
+ switch (info.alphaType()) {
+ case kUnpremul_SkAlphaType:
+ proc = &swizzle_mask24_to_n32_unpremul;
+ break;
+ case kPremul_SkAlphaType:
+ proc = &swizzle_mask24_to_n32_premul;
+ break;
+ case kOpaque_SkAlphaType:
+ proc = &swizzle_mask24_to_n32_opaque;
+ break;
+ default:
+ break;
+ }
+ break;
+ case kRGB_565_SkColorType:
+ switch (info.alphaType()) {
+ case kOpaque_SkAlphaType:
+ proc = &swizzle_mask24_to_565;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
}
break;
case 32:
- if (0 == alphaMask) {
- proc = &swizzle_mask32_to_n32;
- } else {
- proc = &swizzle_mask32_alpha_to_n32;
+ switch (info.colorType()) {
+ case kN32_SkColorType:
+ switch (info.alphaType()) {
+ case kUnpremul_SkAlphaType:
+ proc = &swizzle_mask32_to_n32_unpremul;
+ break;
+ case kPremul_SkAlphaType:
+ proc = &swizzle_mask32_to_n32_premul;
+ break;
+ case kOpaque_SkAlphaType:
+ proc = &swizzle_mask32_to_n32_opaque;
+ break;
+ default:
+ break;
+ }
+ break;
+ case kRGB_565_SkColorType:
+ switch (info.alphaType()) {
+ case kOpaque_SkAlphaType:
+ proc = &swizzle_mask32_to_565;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
}
break;
default:
SkASSERT(false);
return NULL;
}
- return SkNEW_ARGS(SkMaskSwizzler, (imageInfo, masks, proc));
+ return SkNEW_ARGS(SkMaskSwizzler, (info, masks, proc));
}
/*
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