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Unified Diff: src/core/SkBlitter_4444.cpp

Issue 17335008: remove dst/rendertarget support for kARGB_4444_Config (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: Created 7 years, 6 months ago
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Index: src/core/SkBlitter_4444.cpp
diff --git a/src/core/SkBlitter_4444.cpp b/src/core/SkBlitter_4444.cpp
deleted file mode 100644
index 0d81f8ddb6774869843d93509447bdfd69e8256c..0000000000000000000000000000000000000000
--- a/src/core/SkBlitter_4444.cpp
+++ /dev/null
@@ -1,480 +0,0 @@
-
-/*
- * Copyright 2006 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkCoreBlitters.h"
-#include "SkColorPriv.h"
-#include "SkDither.h"
-#include "SkShader.h"
-#include "SkTemplatesPriv.h"
-#include "SkUtils.h"
-#include "SkXfermode.h"
-
-static inline SkPMColor SkBlendARGB4444(SkPMColor16 src, SkPMColor16 dst,
- U8CPU aa) {
- SkASSERT((unsigned)aa <= 255);
-
- unsigned src_scale = SkAlpha255To256(aa) >> 4;
- unsigned dst_scale = SkAlpha15To16(15 - SkAlphaMul4(SkGetPackedA4444(src), src_scale));
-
- uint32_t src32 = SkExpand_4444(src) * src_scale;
- uint32_t dst32 = SkExpand_4444(dst) * dst_scale;
- return SkCompact_4444((src32 + dst32) >> 4);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-class SkARGB4444_Blitter : public SkRasterBlitter {
-public:
- SkARGB4444_Blitter(const SkBitmap& device, const SkPaint& paint);
- virtual void blitH(int x, int y, int width);
- virtual void blitAntiH(int x, int y, const SkAlpha antialias[],
- const int16_t runs[]);
- virtual void blitV(int x, int y, int height, SkAlpha alpha);
- virtual void blitRect(int x, int y, int width, int height);
- virtual void blitMask(const SkMask&, const SkIRect&);
- virtual const SkBitmap* justAnOpaqueColor(uint32_t*);
-
-protected:
- SkPMColor16 fPMColor16, fPMColor16Other;
- SkPMColor16 fRawColor16, fRawColor16Other;
- uint8_t fScale16;
-
-private:
- // illegal
- SkARGB4444_Blitter& operator=(const SkARGB4444_Blitter&);
-
- typedef SkRasterBlitter INHERITED;
-};
-
-
-SkARGB4444_Blitter::SkARGB4444_Blitter(const SkBitmap& device,
- const SkPaint& paint) : INHERITED(device) {
- // cache premultiplied versions in 4444
- SkPMColor c = SkPreMultiplyColor(paint.getColor());
- fPMColor16 = SkPixel32ToPixel4444(c);
- if (paint.isDither()) {
- fPMColor16Other = SkDitherPixel32To4444(c);
- } else {
- fPMColor16Other = fPMColor16;
- }
-
- // cache raw versions in 4444
- fRawColor16 = SkPackARGB4444(0xFF >> 4, SkColorGetR(c) >> 4,
- SkColorGetG(c) >> 4, SkColorGetB(c) >> 4);
- if (paint.isDither()) {
- fRawColor16Other = SkDitherARGB32To4444(0xFF, SkColorGetR(c),
- SkColorGetG(c), SkColorGetB(c));
- } else {
- fRawColor16Other = fRawColor16;
- }
-
- fScale16 = SkAlpha15To16(SkGetPackedA4444(fPMColor16Other));
- if (16 == fScale16) {
- // force the original to also be opaque
- fPMColor16 |= (0xF << SK_A4444_SHIFT);
- }
-}
-
-const SkBitmap* SkARGB4444_Blitter::justAnOpaqueColor(uint32_t* value) {
- if (16 == fScale16) {
- *value = fPMColor16;
- return &fDevice;
- }
- return NULL;
-}
-
-static void src_over_4444(SkPMColor16 dst[], SkPMColor16 color,
- SkPMColor16 other, unsigned invScale, int count) {
- int twice = count >> 1;
- while (--twice >= 0) {
- *dst = color + SkAlphaMulQ4(*dst, invScale);
- dst++;
- *dst = other + SkAlphaMulQ4(*dst, invScale);
- dst++;
- }
- if (count & 1) {
- *dst = color + SkAlphaMulQ4(*dst, invScale);
- }
-}
-
-static inline uint32_t SkExpand_4444_Replicate(SkPMColor16 c) {
- uint32_t c32 = SkExpand_4444(c);
- return c32 | (c32 << 4);
-}
-
-static void src_over_4444x(SkPMColor16 dst[], uint32_t color,
- uint32_t other, unsigned invScale, int count) {
- int twice = count >> 1;
- uint32_t tmp;
- while (--twice >= 0) {
- tmp = SkExpand_4444(*dst) * invScale;
- *dst++ = SkCompact_4444((color + tmp) >> 4);
- tmp = SkExpand_4444(*dst) * invScale;
- *dst++ = SkCompact_4444((other + tmp) >> 4);
- }
- if (count & 1) {
- tmp = SkExpand_4444(*dst) * invScale;
- *dst = SkCompact_4444((color + tmp) >> 4);
- }
-}
-
-void SkARGB4444_Blitter::blitH(int x, int y, int width) {
- SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width());
-
- if (0 == fScale16) {
- return;
- }
-
- SkPMColor16* device = fDevice.getAddr16(x, y);
- SkPMColor16 color = fPMColor16;
- SkPMColor16 other = fPMColor16Other;
-
- if ((x ^ y) & 1) {
- SkTSwap<SkPMColor16>(color, other);
- }
-
- if (16 == fScale16) {
- sk_dither_memset16(device, color, other, width);
- } else {
- src_over_4444x(device, SkExpand_4444_Replicate(color),
- SkExpand_4444_Replicate(other),
- 16 - fScale16, width);
- }
-}
-
-void SkARGB4444_Blitter::blitV(int x, int y, int height, SkAlpha alpha) {
- if (0 == alpha || 0 == fScale16) {
- return;
- }
-
- SkPMColor16* device = fDevice.getAddr16(x, y);
- SkPMColor16 color = fPMColor16;
- SkPMColor16 other = fPMColor16Other;
- size_t rb = fDevice.rowBytes();
-
- if ((x ^ y) & 1) {
- SkTSwap<SkPMColor16>(color, other);
- }
-
- if (16 == fScale16 && 255 == alpha) {
- while (--height >= 0) {
- *device = color;
- device = (SkPMColor16*)((char*)device + rb);
- SkTSwap<SkPMColor16>(color, other);
- }
- } else {
- unsigned alphaScale = SkAlpha255To256(alpha);
- uint32_t c32 = SkExpand_4444(color) * (alphaScale >> 4);
- // need to normalize the low nibble of each expanded component
- // so we don't overflow the add with d32
- c32 = SkCompact_4444(c32 >> 4);
- unsigned invScale = 16 - SkAlpha15To16(SkGetPackedA4444(c32));
- // now re-expand and replicate
- c32 = SkExpand_4444_Replicate(c32);
-
- while (--height >= 0) {
- uint32_t d32 = SkExpand_4444(*device) * invScale;
- *device = SkCompact_4444((c32 + d32) >> 4);
- device = (SkPMColor16*)((char*)device + rb);
- }
- }
-}
-
-void SkARGB4444_Blitter::blitRect(int x, int y, int width, int height) {
- SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width() &&
- y + height <= fDevice.height());
-
- if (0 == fScale16) {
- return;
- }
-
- SkPMColor16* device = fDevice.getAddr16(x, y);
- SkPMColor16 color = fPMColor16;
- SkPMColor16 other = fPMColor16Other;
-
- if ((x ^ y) & 1) {
- SkTSwap<SkPMColor16>(color, other);
- }
-
- if (16 == fScale16) {
- while (--height >= 0) {
- sk_dither_memset16(device, color, other, width);
- device = (SkPMColor16*)((char*)device + fDevice.rowBytes());
- SkTSwap<SkPMColor16>(color, other);
- }
- } else {
- unsigned invScale = 16 - fScale16;
-
- uint32_t c32 = SkExpand_4444_Replicate(color);
- uint32_t o32 = SkExpand_4444_Replicate(other);
- while (--height >= 0) {
- src_over_4444x(device, c32, o32, invScale, width);
- device = (SkPMColor16*)((char*)device + fDevice.rowBytes());
- SkTSwap<uint32_t>(c32, o32);
- }
- }
-}
-
-void SkARGB4444_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[],
- const int16_t runs[]) {
- if (0 == fScale16) {
- return;
- }
-
- SkPMColor16* device = fDevice.getAddr16(x, y);
- SkPMColor16 color = fPMColor16;
- SkPMColor16 other = fPMColor16Other;
-
- if ((x ^ y) & 1) {
- SkTSwap<SkPMColor16>(color, other);
- }
-
- for (;;) {
- int count = runs[0];
- SkASSERT(count >= 0);
- if (count <= 0) {
- return;
- }
-
- unsigned aa = antialias[0];
- if (aa) {
- if (0xFF == aa) {
- if (16 == fScale16) {
- sk_dither_memset16(device, color, other, count);
- } else {
- src_over_4444(device, color, other, 16 - fScale16, count);
- }
- } else {
- // todo: respect dithering
- aa = SkAlpha255To256(aa); // FIX
- SkPMColor16 src = SkAlphaMulQ4(color, aa >> 4);
- unsigned dst_scale = SkAlpha15To16(15 - SkGetPackedA4444(src)); // FIX
- int n = count;
- do {
- --n;
- device[n] = src + SkAlphaMulQ4(device[n], dst_scale);
- } while (n > 0);
- }
- }
-
- runs += count;
- antialias += count;
- device += count;
-
- if (count & 1) {
- SkTSwap<SkPMColor16>(color, other);
- }
- }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-#define solid_8_pixels(mask, dst, color) \
- do { \
- if (mask & 0x80) dst[0] = color; \
- if (mask & 0x40) dst[1] = color; \
- if (mask & 0x20) dst[2] = color; \
- if (mask & 0x10) dst[3] = color; \
- if (mask & 0x08) dst[4] = color; \
- if (mask & 0x04) dst[5] = color; \
- if (mask & 0x02) dst[6] = color; \
- if (mask & 0x01) dst[7] = color; \
- } while (0)
-
-#define SK_BLITBWMASK_NAME SkARGB4444_BlitBW
-#define SK_BLITBWMASK_ARGS , SkPMColor16 color
-#define SK_BLITBWMASK_BLIT8(mask, dst) solid_8_pixels(mask, dst, color)
-#define SK_BLITBWMASK_GETADDR getAddr16
-#define SK_BLITBWMASK_DEVTYPE uint16_t
-#include "SkBlitBWMaskTemplate.h"
-
-#define blend_8_pixels(mask, dst, sc, dst_scale) \
- do { \
- if (mask & 0x80) { dst[0] = sc + SkAlphaMulQ4(dst[0], dst_scale); } \
- if (mask & 0x40) { dst[1] = sc + SkAlphaMulQ4(dst[1], dst_scale); } \
- if (mask & 0x20) { dst[2] = sc + SkAlphaMulQ4(dst[2], dst_scale); } \
- if (mask & 0x10) { dst[3] = sc + SkAlphaMulQ4(dst[3], dst_scale); } \
- if (mask & 0x08) { dst[4] = sc + SkAlphaMulQ4(dst[4], dst_scale); } \
- if (mask & 0x04) { dst[5] = sc + SkAlphaMulQ4(dst[5], dst_scale); } \
- if (mask & 0x02) { dst[6] = sc + SkAlphaMulQ4(dst[6], dst_scale); } \
- if (mask & 0x01) { dst[7] = sc + SkAlphaMulQ4(dst[7], dst_scale); } \
- } while (0)
-
-#define SK_BLITBWMASK_NAME SkARGB4444_BlendBW
-#define SK_BLITBWMASK_ARGS , uint16_t sc, unsigned dst_scale
-#define SK_BLITBWMASK_BLIT8(mask, dst) blend_8_pixels(mask, dst, sc, dst_scale)
-#define SK_BLITBWMASK_GETADDR getAddr16
-#define SK_BLITBWMASK_DEVTYPE uint16_t
-#include "SkBlitBWMaskTemplate.h"
-
-void SkARGB4444_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) {
- SkASSERT(mask.fBounds.contains(clip));
-
- if (0 == fScale16) {
- return;
- }
-
- if (mask.fFormat == SkMask::kBW_Format) {
- if (16 == fScale16) {
- SkARGB4444_BlitBW(fDevice, mask, clip, fPMColor16);
- } else {
- SkARGB4444_BlendBW(fDevice, mask, clip, fPMColor16, 16 - fScale16);
- }
- return;
- }
-
- int x = clip.fLeft;
- int y = clip.fTop;
- int width = clip.width();
- int height = clip.height();
-
- SkPMColor16* device = fDevice.getAddr16(x, y);
- const uint8_t* alpha = mask.getAddr8(x, y);
- SkPMColor16 srcColor = fPMColor16;
- size_t devRB = fDevice.rowBytes() - (width << 1);
- unsigned maskRB = mask.fRowBytes - width;
-
- do {
- int w = width;
- do {
- unsigned aa = *alpha++;
- *device = SkBlendARGB4444(srcColor, *device, aa);
- device += 1;
- } while (--w != 0);
- device = (SkPMColor16*)((char*)device + devRB);
- alpha += maskRB;
- } while (--height != 0);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-class SkARGB4444_Shader_Blitter : public SkShaderBlitter {
- SkXfermode* fXfermode;
- SkBlitRow::Proc fOpaqueProc;
- SkBlitRow::Proc fAlphaProc;
- SkPMColor* fBuffer;
- uint8_t* fAAExpand;
-public:
-
-SkARGB4444_Shader_Blitter(const SkBitmap& device, const SkPaint& paint)
- : INHERITED(device, paint) {
- const int width = device.width();
- fBuffer = (SkPMColor*)sk_malloc_throw(width * sizeof(SkPMColor) + width);
- fAAExpand = (uint8_t*)(fBuffer + width);
-
- fXfermode = paint.getXfermode();
- SkSafeRef(fXfermode);
-
- unsigned flags = 0;
- if (!(fShader->getFlags() & SkShader::kOpaqueAlpha_Flag)) {
- flags |= SkBlitRow::kSrcPixelAlpha_Flag;
- }
- if (paint.isDither()) {
- flags |= SkBlitRow::kDither_Flag;
- }
- fOpaqueProc = SkBlitRow::Factory(flags, SkBitmap::kARGB_4444_Config);
- fAlphaProc = SkBlitRow::Factory(flags | SkBlitRow::kGlobalAlpha_Flag,
- SkBitmap::kARGB_4444_Config);
-}
-
-virtual ~SkARGB4444_Shader_Blitter() {
- SkSafeUnref(fXfermode);
- sk_free(fBuffer);
-}
-
-virtual void blitH(int x, int y, int width) {
- SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width());
-
- SkPMColor16* device = fDevice.getAddr16(x, y);
- SkPMColor* span = fBuffer;
-
- fShader->shadeSpan(x, y, span, width);
- if (fXfermode) {
- fXfermode->xfer4444(device, span, width, NULL);
- } else {
- fOpaqueProc(device, span, width, 0xFF, x, y);
- }
-}
-
-virtual void blitAntiH(int x, int y, const SkAlpha antialias[],
- const int16_t runs[]) {
- SkPMColor* SK_RESTRICT span = fBuffer;
- uint8_t* SK_RESTRICT aaExpand = fAAExpand;
- SkPMColor16* device = fDevice.getAddr16(x, y);
- SkShader* shader = fShader;
- SkXfermode* xfer = fXfermode;
-
- if (NULL != xfer) {
- for (;;) {
- int count = *runs;
- if (count <= 0) {
- break;
- }
- int aa = *antialias;
- if (aa) {
- shader->shadeSpan(x, y, span, count);
- if (255 == aa) {
- xfer->xfer4444(device, span, count, NULL);
- } else {
- const uint8_t* aaBuffer = antialias;
- if (count > 1) {
- memset(aaExpand, aa, count);
- aaBuffer = aaExpand;
- }
- xfer->xfer4444(device, span, count, aaBuffer);
- }
- }
- device += count;
- runs += count;
- antialias += count;
- x += count;
- }
- } else { // no xfermode
- for (;;) {
- int count = *runs;
- if (count <= 0) {
- break;
- }
- int aa = *antialias;
- if (aa) {
- fShader->shadeSpan(x, y, span, count);
- if (255 == aa) {
- fOpaqueProc(device, span, count, aa, x, y);
- } else {
- fAlphaProc(device, span, count, aa, x, y);
- }
- }
- device += count;
- runs += count;
- antialias += count;
- x += count;
- }
- }
-}
-
-private:
- typedef SkShaderBlitter INHERITED;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-///////////////////////////////////////////////////////////////////////////////
-
-SkBlitter* SkBlitter_ChooseD4444(const SkBitmap& device,
- const SkPaint& paint,
- void* storage, size_t storageSize)
-{
- SkBlitter* blitter;
-
- if (paint.getShader()) {
- SK_PLACEMENT_NEW_ARGS(blitter, SkARGB4444_Shader_Blitter, storage, storageSize, (device, paint));
- } else {
- SK_PLACEMENT_NEW_ARGS(blitter, SkARGB4444_Blitter, storage, storageSize, (device, paint));
- }
- return blitter;
-}
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