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#include "SkBlitRow.h"
#include "SkColorPriv.h"
#include "SkUtils.h"
#define UNROLL
static void S32_Opaque_BlitRow32(SkPMColor* SK_RESTRICT dst,
const SkPMColor* SK_RESTRICT src,
int count, U8CPU alpha) {
SkASSERT(255 == alpha);
memcpy(dst, src, count * sizeof(SkPMColor));
}
static void S32_Blend_BlitRow32(SkPMColor* SK_RESTRICT dst,
const SkPMColor* SK_RESTRICT src,
int count, U8CPU alpha) {
SkASSERT(alpha <= 255);
if (count > 0) {
unsigned src_scale = SkAlpha255To256(alpha);
unsigned dst_scale = 256 - src_scale;
#ifdef UNROLL
if (count & 1) {
*dst = SkAlphaMulQ(*(src++), src_scale) + SkAlphaMulQ(*dst, dst_scale);
dst += 1;
count -= 1;
}
const SkPMColor* SK_RESTRICT srcEnd = src + count;
while (src != srcEnd) {
*dst = SkAlphaMulQ(*(src++), src_scale) + SkAlphaMulQ(*dst, dst_scale);
dst += 1;
*dst = SkAlphaMulQ(*(src++), src_scale) + SkAlphaMulQ(*dst, dst_scale);
dst += 1;
}
#else
do {
*dst = SkAlphaMulQ(*src, src_scale) + SkAlphaMulQ(*dst, dst_scale);
src += 1;
dst += 1;
} while (--count > 0);
#endif
}
}
//#define TEST_SRC_ALPHA
static void S32A_Opaque_BlitRow32(SkPMColor* SK_RESTRICT dst,
const SkPMColor* SK_RESTRICT src,
int count, U8CPU alpha) {
SkASSERT(255 == alpha);
if (count > 0) {
#ifdef UNROLL
if (count & 1) {
*dst = SkPMSrcOver(*(src++), *dst);
dst += 1;
count -= 1;
}
const SkPMColor* SK_RESTRICT srcEnd = src + count;
while (src != srcEnd) {
*dst = SkPMSrcOver(*(src++), *dst);
dst += 1;
*dst = SkPMSrcOver(*(src++), *dst);
dst += 1;
}
#else
do {
#ifdef TEST_SRC_ALPHA
SkPMColor sc = *src;
if (sc) {
unsigned srcA = SkGetPackedA32(sc);
SkPMColor result = sc;
if (srcA != 255) {
result = SkPMSrcOver(sc, *dst);
}
*dst = result;
}
#else
*dst = SkPMSrcOver(*src, *dst);
#endif
src += 1;
dst += 1;
} while (--count > 0);
#endif
}
}
static void S32A_Blend_BlitRow32(SkPMColor* SK_RESTRICT dst,
const SkPMColor* SK_RESTRICT src,
int count, U8CPU alpha) {
SkASSERT(alpha <= 255);
if (count > 0) {
#ifdef UNROLL
if (count & 1) {
*dst = SkBlendARGB32(*(src++), *dst, alpha);
dst += 1;
count -= 1;
}
const SkPMColor* SK_RESTRICT srcEnd = src + count;
while (src != srcEnd) {
*dst = SkBlendARGB32(*(src++), *dst, alpha);
dst += 1;
*dst = SkBlendARGB32(*(src++), *dst, alpha);
dst += 1;
}
#else
do {
*dst = SkBlendARGB32(*src, *dst, alpha);
src += 1;
dst += 1;
} while (--count > 0);
#endif
}
}
///////////////////////////////////////////////////////////////////////////////
static const SkBlitRow::Proc32 gDefault_Procs32[] = {
S32_Opaque_BlitRow32,
S32_Blend_BlitRow32,
S32A_Opaque_BlitRow32,
S32A_Blend_BlitRow32
};
SkBlitRow::Proc32 SkBlitRow::Factory32(unsigned flags) {
SkASSERT(flags < SK_ARRAY_COUNT(gDefault_Procs32));
// just so we don't crash
flags &= kFlags32_Mask;
SkBlitRow::Proc32 proc = PlatformProcs32(flags);
if (NULL == proc) {
proc = gDefault_Procs32[flags];
}
SkASSERT(proc);
return proc;
}
SkBlitRow::Proc32 SkBlitRow::ColorProcFactory() {
SkBlitRow::ColorProc proc = PlatformColorProc();
if (NULL == proc) {
proc = Color32;
}
SkASSERT(proc);
return proc;
}
void SkBlitRow::Color32(SkPMColor dst[], const SkPMColor src[],
int count, SkPMColor color) {
if (count > 0) {
if (0 == color) {
if (src != dst) {
memcpy(dst, src, count * sizeof(SkPMColor));
}
}
unsigned colorA = SkGetPackedA32(color);
if (255 == colorA) {
sk_memset32(dst, color, count);
} else {
unsigned scale = 256 - SkAlpha255To256(colorA);
do {
*dst = color + SkAlphaMulQ(*src, scale);
src += 1;
dst += 1;
} while (--count);
}
}
}
///////////////////////////////////////////////////////////////////////////////
static void D32_Mask_Color(void* dst, size_t dstRB, SkBitmap::Config,
const uint8_t* mask, size_t maskRB, SkColor color,
int width, int height) {
SkPMColor pmc = SkPreMultiplyColor(color);
size_t dstOffset = dstRB - (width << 2);
size_t maskOffset = maskRB - width;
SkPMColor *device = (SkPMColor *)dst;
do {
int w = width;
do {
unsigned aa = *mask++;
*device = SkBlendARGB32(pmc, *device, aa);
device += 1;
} while (--w != 0);
device = (uint32_t*)((char*)device + dstOffset);
mask += maskOffset;
} while (--height != 0);
}
static void D32_Mask_Opaque(void* dst, size_t dstRB, SkBitmap::Config,
const uint8_t* mask, size_t maskRB, SkColor color,
int width, int height) {
SkPMColor pmc = SkPreMultiplyColor(color);
uint32_t* device = (uint32_t*)dst;
maskRB -= width;
dstRB -= (width << 2);
do {
int w = width;
do {
unsigned aa = *mask++;
*device = SkAlphaMulQ(pmc, SkAlpha255To256(aa)) + SkAlphaMulQ(*device, SkAlpha255To256(255 - aa));
device += 1;
} while (--w != 0);
device = (uint32_t*)((char*)device + dstRB);
mask += maskRB;
} while (--height != 0);
}
static void D32_Mask_Black(void* dst, size_t dstRB, SkBitmap::Config,
const uint8_t* mask, size_t maskRB, SkColor,
int width, int height) {
uint32_t* device = (uint32_t*)dst;
maskRB -= width;
dstRB -= (width << 2);
do {
int w = width;
do {
unsigned aa = *mask++;
*device = (aa << SK_A32_SHIFT) + SkAlphaMulQ(*device, SkAlpha255To256(255 - aa));
device += 1;
} while (--w != 0);
device = (uint32_t*)((char*)device + dstRB);
mask += maskRB;
} while (--height != 0);
}
SkBlitMask::Proc SkBlitMask::Factory(SkBitmap::Config config, SkColor color) {
SkBlitMask::Proc proc = PlatformProcs(config, color);
proc = NULL;
if (NULL == proc) {
switch (config) {
case SkBitmap::kARGB_8888_Config:
if (SK_ColorBLACK == color) {
proc = D32_Mask_Black;
} else if (0xFF == SkColorGetA(color)) {
proc = D32_Mask_Opaque;
} else {
proc = D32_Mask_Color;
}
break;
default:
break;
}
}
return proc;
}
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