259 lines
8.7 KiB
C++
259 lines
8.7 KiB
C++
#include "SkBlitRow.h"
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#include "SkColorPriv.h"
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#include "SkDither.h"
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///////////////////////////////////////////////////////////////////////////////
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static void S32_D565_Opaque(uint16_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src, int count,
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U8CPU alpha, int /*x*/, int /*y*/) {
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SkASSERT(255 == alpha);
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if (count > 0) {
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do {
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SkPMColor c = *src++;
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SkPMColorAssert(c);
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SkASSERT(SkGetPackedA32(c) == 255);
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*dst++ = SkPixel32ToPixel16_ToU16(c);
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} while (--count != 0);
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}
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}
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static void S32_D565_Blend(uint16_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src, int count,
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U8CPU alpha, int /*x*/, int /*y*/) {
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SkASSERT(255 > alpha);
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if (count > 0) {
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int scale = SkAlpha255To256(alpha);
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do {
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SkPMColor c = *src++;
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SkPMColorAssert(c);
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SkASSERT(SkGetPackedA32(c) == 255);
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uint16_t d = *dst;
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*dst++ = SkPackRGB16(
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SkAlphaBlend(SkPacked32ToR16(c), SkGetPackedR16(d), scale),
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SkAlphaBlend(SkPacked32ToG16(c), SkGetPackedG16(d), scale),
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SkAlphaBlend(SkPacked32ToB16(c), SkGetPackedB16(d), scale));
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} while (--count != 0);
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}
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}
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static void S32A_D565_Opaque(uint16_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src, int count,
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U8CPU alpha, int /*x*/, int /*y*/) {
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SkASSERT(255 == alpha);
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if (count > 0) {
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do {
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SkPMColor c = *src++;
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SkPMColorAssert(c);
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// if (__builtin_expect(c!=0, 1))
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if (c) {
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*dst = SkSrcOver32To16(c, *dst);
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}
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dst += 1;
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} while (--count != 0);
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}
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}
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static void S32A_D565_Blend(uint16_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src, int count,
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U8CPU alpha, int /*x*/, int /*y*/) {
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SkASSERT(255 > alpha);
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if (count > 0) {
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int src_scale = SkAlpha255To256(alpha);
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do {
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SkPMColor sc = *src++;
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SkPMColorAssert(sc);
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if (sc)
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{
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uint16_t dc = *dst;
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unsigned sa = SkGetPackedA32(sc);
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unsigned dr, dg, db;
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if (sa == 255) {
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dr = SkAlphaBlend(SkPacked32ToR16(sc), SkGetPackedR16(dc), src_scale);
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dg = SkAlphaBlend(SkPacked32ToG16(sc), SkGetPackedG16(dc), src_scale);
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db = SkAlphaBlend(SkPacked32ToB16(sc), SkGetPackedB16(dc), src_scale);
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} else {
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unsigned dst_scale = 255 - SkAlphaMul(sa, src_scale);
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dr = (SkPacked32ToR16(sc) * src_scale + SkGetPackedR16(dc) * dst_scale) >> 8;
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dg = (SkPacked32ToG16(sc) * src_scale + SkGetPackedG16(dc) * dst_scale) >> 8;
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db = (SkPacked32ToB16(sc) * src_scale + SkGetPackedB16(dc) * dst_scale) >> 8;
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}
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*dst = SkPackRGB16(dr, dg, db);
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}
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dst += 1;
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} while (--count != 0);
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}
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}
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/////////////////////////////////////////////////////////////////////////////
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static void S32_D565_Opaque_Dither(uint16_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src,
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int count, U8CPU alpha, int x, int y) {
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SkASSERT(255 == alpha);
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if (count > 0) {
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DITHER_565_SCAN(y);
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do {
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SkPMColor c = *src++;
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SkPMColorAssert(c);
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SkASSERT(SkGetPackedA32(c) == 255);
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unsigned dither = DITHER_VALUE(x);
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*dst++ = SkDitherRGB32To565(c, dither);
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DITHER_INC_X(x);
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} while (--count != 0);
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}
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}
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static void S32_D565_Blend_Dither(uint16_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src,
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int count, U8CPU alpha, int x, int y) {
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SkASSERT(255 > alpha);
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if (count > 0) {
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int scale = SkAlpha255To256(alpha);
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DITHER_565_SCAN(y);
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do {
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SkPMColor c = *src++;
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SkPMColorAssert(c);
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SkASSERT(SkGetPackedA32(c) == 255);
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int dither = DITHER_VALUE(x);
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int sr = SkGetPackedR32(c);
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int sg = SkGetPackedG32(c);
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int sb = SkGetPackedB32(c);
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sr = SkDITHER_R32To565(sr, dither);
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sg = SkDITHER_G32To565(sg, dither);
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sb = SkDITHER_B32To565(sb, dither);
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uint16_t d = *dst;
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*dst++ = SkPackRGB16(SkAlphaBlend(sr, SkGetPackedR16(d), scale),
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SkAlphaBlend(sg, SkGetPackedG16(d), scale),
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SkAlphaBlend(sb, SkGetPackedB16(d), scale));
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DITHER_INC_X(x);
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} while (--count != 0);
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}
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}
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static void S32A_D565_Opaque_Dither(uint16_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src,
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int count, U8CPU alpha, int x, int y) {
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SkASSERT(255 == alpha);
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if (count > 0) {
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DITHER_565_SCAN(y);
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do {
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SkPMColor c = *src++;
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SkPMColorAssert(c);
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if (c) {
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unsigned a = SkGetPackedA32(c);
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int d = SkAlphaMul(DITHER_VALUE(x), SkAlpha255To256(a));
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unsigned sr = SkGetPackedR32(c);
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unsigned sg = SkGetPackedG32(c);
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unsigned sb = SkGetPackedB32(c);
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sr = SkDITHER_R32_FOR_565(sr, d);
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sg = SkDITHER_G32_FOR_565(sg, d);
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sb = SkDITHER_B32_FOR_565(sb, d);
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uint32_t src_expanded = (sg << 24) | (sr << 13) | (sb << 2);
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uint32_t dst_expanded = SkExpand_rgb_16(*dst);
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dst_expanded = dst_expanded * (SkAlpha255To256(255 - a) >> 3);
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// now src and dst expanded are in g:11 r:10 x:1 b:10
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*dst = SkCompact_rgb_16((src_expanded + dst_expanded) >> 5);
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}
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dst += 1;
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DITHER_INC_X(x);
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} while (--count != 0);
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}
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}
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static void S32A_D565_Blend_Dither(uint16_t* SK_RESTRICT dst,
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const SkPMColor* SK_RESTRICT src,
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int count, U8CPU alpha, int x, int y) {
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SkASSERT(255 > alpha);
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if (count > 0) {
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int src_scale = SkAlpha255To256(alpha);
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DITHER_565_SCAN(y);
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do {
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SkPMColor c = *src++;
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SkPMColorAssert(c);
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if (c)
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{
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unsigned d = *dst;
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int sa = SkGetPackedA32(c);
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int dst_scale = SkAlpha255To256(255 - SkAlphaMul(sa, src_scale));
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int dither = DITHER_VALUE(x);
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int sr = SkGetPackedR32(c);
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int sg = SkGetPackedG32(c);
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int sb = SkGetPackedB32(c);
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sr = SkDITHER_R32To565(sr, dither);
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sg = SkDITHER_G32To565(sg, dither);
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sb = SkDITHER_B32To565(sb, dither);
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int dr = (sr * src_scale + SkGetPackedR16(d) * dst_scale) >> 8;
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int dg = (sg * src_scale + SkGetPackedG16(d) * dst_scale) >> 8;
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int db = (sb * src_scale + SkGetPackedB16(d) * dst_scale) >> 8;
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*dst = SkPackRGB16(dr, dg, db);
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}
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dst += 1;
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DITHER_INC_X(x);
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} while (--count != 0);
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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#ifdef USE_T32CB16BLEND_ASM
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extern "C" void scanline_t32cb16blend_arm(uint16_t*, uint32_t*, size_t);
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#endif
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static const SkBlitRow::Proc gProcs16[] = {
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// no dither
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S32_D565_Opaque,
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S32_D565_Blend,
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#ifdef USE_T32CB16BLEND_ASM
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(SkBlitRow::Proc)scanline_t32cb16blend_arm,
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#else
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S32A_D565_Opaque,
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#endif
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S32A_D565_Blend,
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// dither
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S32_D565_Opaque_Dither,
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S32_D565_Blend_Dither,
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S32A_D565_Opaque_Dither,
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S32A_D565_Blend_Dither
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};
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extern SkBlitRow::Proc SkBlitRow_Factory_4444(unsigned flags);
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SkBlitRow::Proc SkBlitRow::Factory(unsigned flags, SkBitmap::Config config) {
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SkASSERT(flags < SK_ARRAY_COUNT(gProcs16));
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switch (config) {
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case SkBitmap::kRGB_565_Config:
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return gProcs16[flags];
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case SkBitmap::kARGB_4444_Config:
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return SkBlitRow_Factory_4444(flags);
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default:
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break;
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}
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return NULL;
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}
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