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Unified Diff: src/core/SkScalerContext.cpp

Issue 86483002: Revert "Revert "remove kA1_Config, as it is no longer supported"" (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: add change to picture version Created 7 years, 1 month ago
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Index: src/core/SkScalerContext.cpp
diff --git a/src/core/SkScalerContext.cpp b/src/core/SkScalerContext.cpp
index 1d6c2f79a5dcb427cfbf5b94f110596a207df977..f4f23911b0e3aedbae6194e6efa997a0c96cd946 100644
--- a/src/core/SkScalerContext.cpp
+++ b/src/core/SkScalerContext.cpp
@@ -523,10 +523,54 @@ static void pack4xHToLCD32(const SkBitmap& src, const SkMask& dst,
}
}
+static inline int convert_8_to_1(unsigned byte) {
+ SkASSERT(byte <= 0xFF);
+ return byte >> 7;
+}
+
+static uint8_t pack_8_to_1(const uint8_t alpha[8]) {
+ unsigned bits = 0;
+ for (int i = 0; i < 8; ++i) {
+ bits |= convert_8_to_1(alpha[i]);
+ bits <<= 1;
+ }
+ return SkToU8(bits);
+}
+
+static void packA8ToA1(const SkMask& mask, const uint8_t* src, size_t srcRB) {
+ const int height = mask.fBounds.height();
+ const int width = mask.fBounds.width();
+ const int octs = width >> 3;
+ const int leftOverBits = width & 7;
+
+ uint8_t* dst = mask.fImage;
+ const int dstPad = mask.fRowBytes - SkAlign8(width);
+ SkASSERT(dstPad >= 0);
+
+ const int srcPad = srcRB - width;
+ SkASSERT(srcPad >= 0);
+
+ for (int y = 0; y < height; ++y) {
+ for (int i = 0; i < octs; ++i) {
+ *dst++ = pack_8_to_1(src);
+ src += 8;
+ }
+ if (leftOverBits > 0) {
+ unsigned bits = 0;
+ int shift = 7;
+ for (int i = 0; i < leftOverBits; ++i, --shift) {
+ bits |= convert_8_to_1(*src++ >> 7) << shift;
+ }
+ *dst++ = bits;
+ }
+ src += srcPad;
+ dst += dstPad;
+ }
+}
+
static void generateMask(const SkMask& mask, const SkPath& path,
const SkMaskGamma::PreBlend& maskPreBlend) {
- SkBitmap::Config config;
- SkPaint paint;
+ SkPaint paint;
int srcW = mask.fBounds.width();
int srcH = mask.fBounds.height();
@@ -538,27 +582,25 @@ static void generateMask(const SkMask& mask, const SkPath& path,
matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft),
-SkIntToScalar(mask.fBounds.fTop));
- if (SkMask::kBW_Format == mask.fFormat) {
- config = SkBitmap::kA1_Config;
- paint.setAntiAlias(false);
- } else {
- config = SkBitmap::kA8_Config;
- paint.setAntiAlias(true);
- switch (mask.fFormat) {
- case SkMask::kA8_Format:
- break;
- case SkMask::kLCD16_Format:
- case SkMask::kLCD32_Format:
- // TODO: trigger off LCD orientation
- dstW = 4*dstW - 8;
- matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft + 1),
- -SkIntToScalar(mask.fBounds.fTop));
- matrix.postScale(SkIntToScalar(4), SK_Scalar1);
- dstRB = 0; // signals we need a copy
- break;
- default:
- SkDEBUGFAIL("unexpected mask format");
- }
+ SkBitmap::Config config = SkBitmap::kA8_Config;
+ paint.setAntiAlias(SkMask::kBW_Format != mask.fFormat);
+ switch (mask.fFormat) {
+ case SkMask::kBW_Format:
+ dstRB = 0; // signals we need a copy
+ break;
+ case SkMask::kA8_Format:
+ break;
+ case SkMask::kLCD16_Format:
+ case SkMask::kLCD32_Format:
+ // TODO: trigger off LCD orientation
+ dstW = 4*dstW - 8;
+ matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft + 1),
+ -SkIntToScalar(mask.fBounds.fTop));
+ matrix.postScale(SkIntToScalar(4), SK_Scalar1);
+ dstRB = 0; // signals we need a copy
+ break;
+ default:
+ SkDEBUGFAIL("unexpected mask format");
}
SkRasterClip clip;
@@ -587,6 +629,9 @@ static void generateMask(const SkMask& mask, const SkPath& path,
draw.drawPath(path, paint);
switch (mask.fFormat) {
+ case SkMask::kBW_Format:
+ packA8ToA1(mask, bm.getAddr8(0, 0), bm.rowBytes());
+ break;
case SkMask::kA8_Format:
if (maskPreBlend.isApplicable()) {
applyLUTToA8Mask(mask, maskPreBlend.fG);
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