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/*
* 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 "SkSpriteBlitter.h"
#include "SkBlitRow.h"
#include "SkTemplates.h"
#include "SkUtils.h"
#include "SkColorPriv.h"
#define D16_S32A_Opaque_Pixel(dst, sc) \
do { \
if (sc) { \
*dst = SkSrcOver32To16(sc, *dst); \
} \
} while (0)
static inline void D16_S32A_Blend_Pixel_helper(uint16_t* dst, SkPMColor sc,
unsigned src_scale) {
uint16_t dc = *dst;
unsigned sa = SkGetPackedA32(sc);
unsigned dr, dg, db;
if (255 == sa) {
dr = SkAlphaBlend(SkPacked32ToR16(sc), SkGetPackedR16(dc), src_scale);
dg = SkAlphaBlend(SkPacked32ToG16(sc), SkGetPackedG16(dc), src_scale);
db = SkAlphaBlend(SkPacked32ToB16(sc), SkGetPackedB16(dc), src_scale);
} else {
unsigned dst_scale = 255 - SkAlphaMul(sa, src_scale);
dr = (SkPacked32ToR16(sc) * src_scale +
SkGetPackedR16(dc) * dst_scale) >> 8;
dg = (SkPacked32ToG16(sc) * src_scale +
SkGetPackedG16(dc) * dst_scale) >> 8;
db = (SkPacked32ToB16(sc) * src_scale +
SkGetPackedB16(dc) * dst_scale) >> 8;
}
*dst = SkPackRGB16(dr, dg, db);
}
#define D16_S32A_Blend_Pixel(dst, sc, src_scale) \
do { if (sc) D16_S32A_Blend_Pixel_helper(dst, sc, src_scale); } while (0)
///////////////////////////////////////////////////////////////////////////////
class Sprite_D16_S16_Opaque : public SkSpriteBlitter {
public:
Sprite_D16_S16_Opaque(const SkBitmap& source)
: SkSpriteBlitter(source) {}
// overrides
void blitRect(int x, int y, int width, int height) SK_OVERRIDE {
uint16_t* SK_RESTRICT dst = fDevice->getAddr16(x, y);
const uint16_t* SK_RESTRICT src = fSource->getAddr16(x - fLeft,
y - fTop);
size_t dstRB = fDevice->rowBytes();
size_t srcRB = fSource->rowBytes();
while (--height >= 0) {
memcpy(dst, src, width << 1);
dst = (uint16_t*)((char*)dst + dstRB);
src = (const uint16_t*)((const char*)src + srcRB);
}
}
};
#define D16_S16_Blend_Pixel(dst, sc, scale) \
do { \
uint16_t dc = *dst; \
*dst = SkBlendRGB16(sc, dc, scale); \
} while (0)
#define SkSPRITE_CLASSNAME Sprite_D16_S16_Blend
#define SkSPRITE_ARGS , uint8_t alpha
#define SkSPRITE_FIELDS uint8_t fSrcAlpha;
#define SkSPRITE_INIT fSrcAlpha = alpha;
#define SkSPRITE_DST_TYPE uint16_t
#define SkSPRITE_SRC_TYPE uint16_t
#define SkSPRITE_DST_GETADDR getAddr16
#define SkSPRITE_SRC_GETADDR getAddr16
#define SkSPRITE_PREAMBLE(srcBM, x, y) int scale = SkAlpha255To256(fSrcAlpha);
#define SkSPRITE_BLIT_PIXEL(dst, src) D16_S16_Blend_Pixel(dst, src, scale)
#define SkSPRITE_NEXT_ROW
#define SkSPRITE_POSTAMBLE(srcBM)
#include "SkSpriteBlitterTemplate.h"
///////////////////////////////////////////////////////////////////////////////
#define D16_S4444_Opaque(dst, sc) \
do { \
uint16_t dc = *dst; \
*dst = SkSrcOver4444To16(sc, dc); \
} while (0)
#define SkSPRITE_CLASSNAME Sprite_D16_S4444_Opaque
#define SkSPRITE_ARGS
#define SkSPRITE_FIELDS
#define SkSPRITE_INIT
#define SkSPRITE_DST_TYPE uint16_t
#define SkSPRITE_SRC_TYPE SkPMColor16
#define SkSPRITE_DST_GETADDR getAddr16
#define SkSPRITE_SRC_GETADDR getAddr16
#define SkSPRITE_PREAMBLE(srcBM, x, y)
#define SkSPRITE_BLIT_PIXEL(dst, src) D16_S4444_Opaque(dst, src)
#define SkSPRITE_NEXT_ROW
#define SkSPRITE_POSTAMBLE(srcBM)
#include "SkSpriteBlitterTemplate.h"
#define D16_S4444_Blend(dst, sc, scale16) \
do { \
uint16_t dc = *dst; \
*dst = SkBlend4444To16(sc, dc, scale16); \
} while (0)
#define SkSPRITE_CLASSNAME Sprite_D16_S4444_Blend
#define SkSPRITE_ARGS , uint8_t alpha
#define SkSPRITE_FIELDS uint8_t fSrcAlpha;
#define SkSPRITE_INIT fSrcAlpha = alpha;
#define SkSPRITE_DST_TYPE uint16_t
#define SkSPRITE_SRC_TYPE uint16_t
#define SkSPRITE_DST_GETADDR getAddr16
#define SkSPRITE_SRC_GETADDR getAddr16
#define SkSPRITE_PREAMBLE(srcBM, x, y) int scale = SkAlpha15To16(fSrcAlpha);
#define SkSPRITE_BLIT_PIXEL(dst, src) D16_S4444_Blend(dst, src, scale)
#define SkSPRITE_NEXT_ROW
#define SkSPRITE_POSTAMBLE(srcBM)
#include "SkSpriteBlitterTemplate.h"
///////////////////////////////////////////////////////////////////////////////
#define SkSPRITE_CLASSNAME Sprite_D16_SIndex8A_Opaque
#define SkSPRITE_ARGS
#define SkSPRITE_FIELDS
#define SkSPRITE_INIT
#define SkSPRITE_DST_TYPE uint16_t
#define SkSPRITE_SRC_TYPE uint8_t
#define SkSPRITE_DST_GETADDR getAddr16
#define SkSPRITE_SRC_GETADDR getAddr8
#define SkSPRITE_PREAMBLE(srcBM, x, y) const SkPMColor* ctable = srcBM.getColorTable()->readColors()
#define SkSPRITE_BLIT_PIXEL(dst, src) D16_S32A_Opaque_Pixel(dst, ctable[src])
#define SkSPRITE_NEXT_ROW
#define SkSPRITE_POSTAMBLE(srcBM)
#include "SkSpriteBlitterTemplate.h"
#define SkSPRITE_CLASSNAME Sprite_D16_SIndex8A_Blend
#define SkSPRITE_ARGS , uint8_t alpha
#define SkSPRITE_FIELDS uint8_t fSrcAlpha;
#define SkSPRITE_INIT fSrcAlpha = alpha;
#define SkSPRITE_DST_TYPE uint16_t
#define SkSPRITE_SRC_TYPE uint8_t
#define SkSPRITE_DST_GETADDR getAddr16
#define SkSPRITE_SRC_GETADDR getAddr8
#define SkSPRITE_PREAMBLE(srcBM, x, y) const SkPMColor* ctable = srcBM.getColorTable()->readColors(); unsigned src_scale = SkAlpha255To256(fSrcAlpha);
#define SkSPRITE_BLIT_PIXEL(dst, src) D16_S32A_Blend_Pixel(dst, ctable[src], src_scale)
#define SkSPRITE_NEXT_ROW
#define SkSPRITE_POSTAMBLE(srcBM)
#include "SkSpriteBlitterTemplate.h"
///////////////////////////////////////////////////////////////////////////////
static intptr_t asint(const void* ptr) {
return reinterpret_cast<const char*>(ptr) - (const char*)0;
}
static void blitrow_d16_si8(uint16_t* SK_RESTRICT dst,
const uint8_t* SK_RESTRICT src, int count,
const uint16_t* SK_RESTRICT ctable) {
if (count <= 8) {
do {
*dst++ = ctable[*src++];
} while (--count);
return;
}
// eat src until we're on a 4byte boundary
while (asint(src) & 3) {
*dst++ = ctable[*src++];
count -= 1;
}
int qcount = count >> 2;
SkASSERT(qcount > 0);
const uint32_t* qsrc = reinterpret_cast<const uint32_t*>(src);
if (asint(dst) & 2) {
do {
uint32_t s4 = *qsrc++;
#ifdef SK_CPU_LENDIAN
*dst++ = ctable[s4 & 0xFF];
*dst++ = ctable[(s4 >> 8) & 0xFF];
*dst++ = ctable[(s4 >> 16) & 0xFF];
*dst++ = ctable[s4 >> 24];
#else // BENDIAN
*dst++ = ctable[s4 >> 24];
*dst++ = ctable[(s4 >> 16) & 0xFF];
*dst++ = ctable[(s4 >> 8) & 0xFF];
*dst++ = ctable[s4 & 0xFF];
#endif
} while (--qcount);
} else { // dst is on a 4byte boundary
uint32_t* ddst = reinterpret_cast<uint32_t*>(dst);
do {
uint32_t s4 = *qsrc++;
#ifdef SK_CPU_LENDIAN
*ddst++ = (ctable[(s4 >> 8) & 0xFF] << 16) | ctable[s4 & 0xFF];
*ddst++ = (ctable[s4 >> 24] << 16) | ctable[(s4 >> 16) & 0xFF];
#else // BENDIAN
*ddst++ = (ctable[s4 >> 24] << 16) | ctable[(s4 >> 16) & 0xFF];
*ddst++ = (ctable[(s4 >> 8) & 0xFF] << 16) | ctable[s4 & 0xFF];
#endif
} while (--qcount);
dst = reinterpret_cast<uint16_t*>(ddst);
}
src = reinterpret_cast<const uint8_t*>(qsrc);
count &= 3;
// catch any remaining (will be < 4)
while (--count >= 0) {
*dst++ = ctable[*src++];
}
}
#define SkSPRITE_ROW_PROC(d, s, n, x, y) blitrow_d16_si8(d, s, n, ctable)
#define SkSPRITE_CLASSNAME Sprite_D16_SIndex8_Opaque
#define SkSPRITE_ARGS
#define SkSPRITE_FIELDS
#define SkSPRITE_INIT
#define SkSPRITE_DST_TYPE uint16_t
#define SkSPRITE_SRC_TYPE uint8_t
#define SkSPRITE_DST_GETADDR getAddr16
#define SkSPRITE_SRC_GETADDR getAddr8
#define SkSPRITE_PREAMBLE(srcBM, x, y) const uint16_t* ctable = srcBM.getColorTable()->read16BitCache()
#define SkSPRITE_BLIT_PIXEL(dst, src) *dst = ctable[src]
#define SkSPRITE_NEXT_ROW
#define SkSPRITE_POSTAMBLE(srcBM)
#include "SkSpriteBlitterTemplate.h"
#define SkSPRITE_CLASSNAME Sprite_D16_SIndex8_Blend
#define SkSPRITE_ARGS , uint8_t alpha
#define SkSPRITE_FIELDS uint8_t fSrcAlpha;
#define SkSPRITE_INIT fSrcAlpha = alpha;
#define SkSPRITE_DST_TYPE uint16_t
#define SkSPRITE_SRC_TYPE uint8_t
#define SkSPRITE_DST_GETADDR getAddr16
#define SkSPRITE_SRC_GETADDR getAddr8
#define SkSPRITE_PREAMBLE(srcBM, x, y) const uint16_t* ctable = srcBM.getColorTable()->read16BitCache(); unsigned src_scale = SkAlpha255To256(fSrcAlpha);
#define SkSPRITE_BLIT_PIXEL(dst, src) D16_S16_Blend_Pixel(dst, ctable[src], src_scale)
#define SkSPRITE_NEXT_ROW
#define SkSPRITE_POSTAMBLE(srcBM)
#include "SkSpriteBlitterTemplate.h"
///////////////////////////////////////////////////////////////////////////////
class Sprite_D16_S32_BlitRowProc : public SkSpriteBlitter {
public:
Sprite_D16_S32_BlitRowProc(const SkBitmap& source)
: SkSpriteBlitter(source) {}
// overrides
virtual void setup(const SkBitmap& device, int left, int top,
const SkPaint& paint) SK_OVERRIDE {
this->INHERITED::setup(device, left, top, paint);
unsigned flags = 0;
if (paint.getAlpha() < 0xFF) {
flags |= SkBlitRow::kGlobalAlpha_Flag;
}
if (!fSource->isOpaque()) {
flags |= SkBlitRow::kSrcPixelAlpha_Flag;
}
if (paint.isDither()) {
flags |= SkBlitRow::kDither_Flag;
}
fProc = SkBlitRow::Factory16(flags);
}
void blitRect(int x, int y, int width, int height) SK_OVERRIDE {
uint16_t* SK_RESTRICT dst = fDevice->getAddr16(x, y);
const SkPMColor* SK_RESTRICT src = fSource->getAddr32(x - fLeft,
y - fTop);
size_t dstRB = fDevice->rowBytes();
size_t srcRB = fSource->rowBytes();
SkBlitRow::Proc16 proc = fProc;
U8CPU alpha = fPaint->getAlpha();
while (--height >= 0) {
proc(dst, src, width, alpha, x, y);
y += 1;
dst = (uint16_t* SK_RESTRICT)((char*)dst + dstRB);
src = (const SkPMColor* SK_RESTRICT)((const char*)src + srcRB);
}
}
private:
SkBlitRow::Proc16 fProc;
typedef SkSpriteBlitter INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
SkSpriteBlitter* SkSpriteBlitter::ChooseD16(const SkBitmap& source, const SkPaint& paint,
SkTBlitterAllocator* allocator) {
SkASSERT(allocator != NULL);
if (paint.getMaskFilter() != NULL) { // may add cases for this
return NULL;
}
if (paint.getXfermode() != NULL) { // may add cases for this
return NULL;
}
if (paint.getColorFilter() != NULL) { // may add cases for this
return NULL;
}
const SkAlphaType at = source.alphaType();
SkSpriteBlitter* blitter = NULL;
unsigned alpha = paint.getAlpha();
switch (source.colorType()) {
case kN32_SkColorType: {
if (kPremul_SkAlphaType != at && kOpaque_SkAlphaType != at) {
break;
}
blitter = allocator->createT<Sprite_D16_S32_BlitRowProc>(source);
break;
}
case kARGB_4444_SkColorType:
if (kPremul_SkAlphaType != at && kOpaque_SkAlphaType != at) {
break;
}
if (255 == alpha) {
blitter = allocator->createT<Sprite_D16_S4444_Opaque>(source);
} else {
blitter = allocator->createT<Sprite_D16_S4444_Blend>(source, alpha >> 4);
}
break;
case kRGB_565_SkColorType:
if (255 == alpha) {
blitter = allocator->createT<Sprite_D16_S16_Opaque>(source);
} else {
blitter = allocator->createT<Sprite_D16_S16_Blend>(source, alpha);
}
break;
case kIndex_8_SkColorType:
if (kPremul_SkAlphaType != at && kOpaque_SkAlphaType != at) {
break;
}
if (paint.isDither()) {
// we don't support dither yet in these special cases
break;
}
if (source.isOpaque()) {
if (255 == alpha) {
blitter = allocator->createT<Sprite_D16_SIndex8_Opaque>(source);
} else {
blitter = allocator->createT<Sprite_D16_SIndex8_Blend>(source, alpha);
}
} else {
if (255 == alpha) {
blitter = allocator->createT<Sprite_D16_SIndex8A_Opaque>(source);
} else {
blitter = allocator->createT<Sprite_D16_SIndex8A_Blend>(source, alpha);
}
}
break;
default:
break;
}
return blitter;
}
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