michael@0: 
michael@0: /*
michael@0:  * Copyright 2006 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "SkSpriteBlitter.h"
michael@0: #include "SkBlitRow.h"
michael@0: #include "SkTemplates.h"
michael@0: #include "SkUtils.h"
michael@0: #include "SkColorPriv.h"
michael@0: 
michael@0: #define D16_S32A_Opaque_Pixel(dst, sc)                                        \
michael@0: do {                                                                          \
michael@0:     if (sc) {                                                                 \
michael@0:         *dst = SkSrcOver32To16(sc, *dst);                                     \
michael@0:     }                                                                         \
michael@0: } while (0)
michael@0: 
michael@0: static inline void D16_S32A_Blend_Pixel_helper(uint16_t* dst, SkPMColor sc,
michael@0:                                                unsigned src_scale) {
michael@0:     uint16_t dc = *dst;
michael@0:     unsigned sa = SkGetPackedA32(sc);
michael@0:     unsigned dr, dg, db;
michael@0: 
michael@0:     if (255 == sa) {
michael@0:         dr = SkAlphaBlend(SkPacked32ToR16(sc), SkGetPackedR16(dc), src_scale);
michael@0:         dg = SkAlphaBlend(SkPacked32ToG16(sc), SkGetPackedG16(dc), src_scale);
michael@0:         db = SkAlphaBlend(SkPacked32ToB16(sc), SkGetPackedB16(dc), src_scale);
michael@0:     } else {
michael@0:         unsigned dst_scale = 255 - SkAlphaMul(sa, src_scale);
michael@0:         dr = (SkPacked32ToR16(sc) * src_scale +
michael@0:               SkGetPackedR16(dc) * dst_scale) >> 8;
michael@0:         dg = (SkPacked32ToG16(sc) * src_scale +
michael@0:               SkGetPackedG16(dc) * dst_scale) >> 8;
michael@0:         db = (SkPacked32ToB16(sc) * src_scale +
michael@0:               SkGetPackedB16(dc) * dst_scale) >> 8;
michael@0:     }
michael@0:     *dst = SkPackRGB16(dr, dg, db);
michael@0: }
michael@0: 
michael@0: #define D16_S32A_Blend_Pixel(dst, sc, src_scale) \
michael@0:     do { if (sc) D16_S32A_Blend_Pixel_helper(dst, sc, src_scale); } while (0)
michael@0: 
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: class Sprite_D16_S16_Opaque : public SkSpriteBlitter {
michael@0: public:
michael@0:     Sprite_D16_S16_Opaque(const SkBitmap& source)
michael@0:         : SkSpriteBlitter(source) {}
michael@0: 
michael@0:     // overrides
michael@0:     virtual void blitRect(int x, int y, int width, int height) {
michael@0:         uint16_t* SK_RESTRICT dst = fDevice->getAddr16(x, y);
michael@0:         const uint16_t* SK_RESTRICT src = fSource->getAddr16(x - fLeft,
michael@0:                                                              y - fTop);
michael@0:         size_t dstRB = fDevice->rowBytes();
michael@0:         size_t srcRB = fSource->rowBytes();
michael@0: 
michael@0:         while (--height >= 0) {
michael@0:             memcpy(dst, src, width << 1);
michael@0:             dst = (uint16_t*)((char*)dst + dstRB);
michael@0:             src = (const uint16_t*)((const char*)src + srcRB);
michael@0:         }
michael@0:     }
michael@0: };
michael@0: 
michael@0: #define D16_S16_Blend_Pixel(dst, sc, scale)     \
michael@0:     do {                                        \
michael@0:         uint16_t dc = *dst;                     \
michael@0:         *dst = SkBlendRGB16(sc, dc, scale);     \
michael@0:     } while (0)
michael@0: 
michael@0: #define SkSPRITE_CLASSNAME                  Sprite_D16_S16_Blend
michael@0: #define SkSPRITE_ARGS                       , uint8_t alpha
michael@0: #define SkSPRITE_FIELDS                     uint8_t  fSrcAlpha;
michael@0: #define SkSPRITE_INIT                       fSrcAlpha = alpha;
michael@0: #define SkSPRITE_DST_TYPE                   uint16_t
michael@0: #define SkSPRITE_SRC_TYPE                   uint16_t
michael@0: #define SkSPRITE_DST_GETADDR                getAddr16
michael@0: #define SkSPRITE_SRC_GETADDR                getAddr16
michael@0: #define SkSPRITE_PREAMBLE(srcBM, x, y)      int scale = SkAlpha255To256(fSrcAlpha);
michael@0: #define SkSPRITE_BLIT_PIXEL(dst, src)       D16_S16_Blend_Pixel(dst, src, scale)
michael@0: #define SkSPRITE_NEXT_ROW
michael@0: #define SkSPRITE_POSTAMBLE(srcBM)
michael@0: #include "SkSpriteBlitterTemplate.h"
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: #define D16_S4444_Opaque(dst, sc)           \
michael@0:     do {                                    \
michael@0:         uint16_t dc = *dst;                 \
michael@0:         *dst = SkSrcOver4444To16(sc, dc);   \
michael@0:     } while (0)
michael@0: 
michael@0: #define SkSPRITE_CLASSNAME                  Sprite_D16_S4444_Opaque
michael@0: #define SkSPRITE_ARGS
michael@0: #define SkSPRITE_FIELDS
michael@0: #define SkSPRITE_INIT
michael@0: #define SkSPRITE_DST_TYPE                   uint16_t
michael@0: #define SkSPRITE_SRC_TYPE                   SkPMColor16
michael@0: #define SkSPRITE_DST_GETADDR                getAddr16
michael@0: #define SkSPRITE_SRC_GETADDR                getAddr16
michael@0: #define SkSPRITE_PREAMBLE(srcBM, x, y)
michael@0: #define SkSPRITE_BLIT_PIXEL(dst, src)       D16_S4444_Opaque(dst, src)
michael@0: #define SkSPRITE_NEXT_ROW
michael@0: #define SkSPRITE_POSTAMBLE(srcBM)
michael@0: #include "SkSpriteBlitterTemplate.h"
michael@0: 
michael@0: #define D16_S4444_Blend(dst, sc, scale16)           \
michael@0:     do {                                            \
michael@0:         uint16_t dc = *dst;                         \
michael@0:         *dst = SkBlend4444To16(sc, dc, scale16);    \
michael@0:     } while (0)
michael@0: 
michael@0: 
michael@0: #define SkSPRITE_CLASSNAME                  Sprite_D16_S4444_Blend
michael@0: #define SkSPRITE_ARGS                       , uint8_t alpha
michael@0: #define SkSPRITE_FIELDS                     uint8_t  fSrcAlpha;
michael@0: #define SkSPRITE_INIT                       fSrcAlpha = alpha;
michael@0: #define SkSPRITE_DST_TYPE                   uint16_t
michael@0: #define SkSPRITE_SRC_TYPE                   uint16_t
michael@0: #define SkSPRITE_DST_GETADDR                getAddr16
michael@0: #define SkSPRITE_SRC_GETADDR                getAddr16
michael@0: #define SkSPRITE_PREAMBLE(srcBM, x, y)      int scale = SkAlpha15To16(fSrcAlpha);
michael@0: #define SkSPRITE_BLIT_PIXEL(dst, src)       D16_S4444_Blend(dst, src, scale)
michael@0: #define SkSPRITE_NEXT_ROW
michael@0: #define SkSPRITE_POSTAMBLE(srcBM)
michael@0: #include "SkSpriteBlitterTemplate.h"
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: #define SkSPRITE_CLASSNAME                  Sprite_D16_SIndex8A_Opaque
michael@0: #define SkSPRITE_ARGS
michael@0: #define SkSPRITE_FIELDS
michael@0: #define SkSPRITE_INIT
michael@0: #define SkSPRITE_DST_TYPE                   uint16_t
michael@0: #define SkSPRITE_SRC_TYPE                   uint8_t
michael@0: #define SkSPRITE_DST_GETADDR                getAddr16
michael@0: #define SkSPRITE_SRC_GETADDR                getAddr8
michael@0: #define SkSPRITE_PREAMBLE(srcBM, x, y)      const SkPMColor* ctable = srcBM.getColorTable()->lockColors()
michael@0: #define SkSPRITE_BLIT_PIXEL(dst, src)       D16_S32A_Opaque_Pixel(dst, ctable[src])
michael@0: #define SkSPRITE_NEXT_ROW
michael@0: #define SkSPRITE_POSTAMBLE(srcBM)           srcBM.getColorTable()->unlockColors()
michael@0: #include "SkSpriteBlitterTemplate.h"
michael@0: 
michael@0: #define SkSPRITE_CLASSNAME                  Sprite_D16_SIndex8A_Blend
michael@0: #define SkSPRITE_ARGS                       , uint8_t alpha
michael@0: #define SkSPRITE_FIELDS                     uint8_t fSrcAlpha;
michael@0: #define SkSPRITE_INIT                       fSrcAlpha = alpha;
michael@0: #define SkSPRITE_DST_TYPE                   uint16_t
michael@0: #define SkSPRITE_SRC_TYPE                   uint8_t
michael@0: #define SkSPRITE_DST_GETADDR                getAddr16
michael@0: #define SkSPRITE_SRC_GETADDR                getAddr8
michael@0: #define SkSPRITE_PREAMBLE(srcBM, x, y)      const SkPMColor* ctable = srcBM.getColorTable()->lockColors(); unsigned src_scale = SkAlpha255To256(fSrcAlpha);
michael@0: #define SkSPRITE_BLIT_PIXEL(dst, src)       D16_S32A_Blend_Pixel(dst, ctable[src], src_scale)
michael@0: #define SkSPRITE_NEXT_ROW
michael@0: #define SkSPRITE_POSTAMBLE(srcBM)           srcBM.getColorTable()->unlockColors();
michael@0: #include "SkSpriteBlitterTemplate.h"
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: static intptr_t asint(const void* ptr) {
michael@0:     return reinterpret_cast<const char*>(ptr) - (const char*)0;
michael@0: }
michael@0: 
michael@0: static void blitrow_d16_si8(uint16_t* SK_RESTRICT dst,
michael@0:                             const uint8_t* SK_RESTRICT src, int count,
michael@0:                             const uint16_t* SK_RESTRICT ctable) {
michael@0:     if (count <= 8) {
michael@0:         do {
michael@0:             *dst++ = ctable[*src++];
michael@0:         } while (--count);
michael@0:         return;
michael@0:     }
michael@0: 
michael@0:     // eat src until we're on a 4byte boundary
michael@0:     while (asint(src) & 3) {
michael@0:         *dst++ = ctable[*src++];
michael@0:         count -= 1;
michael@0:     }
michael@0: 
michael@0:     int qcount = count >> 2;
michael@0:     SkASSERT(qcount > 0);
michael@0:     const uint32_t* qsrc = reinterpret_cast<const uint32_t*>(src);
michael@0:     if (asint(dst) & 2) {
michael@0:         do {
michael@0:             uint32_t s4 = *qsrc++;
michael@0: #ifdef SK_CPU_LENDIAN
michael@0:             *dst++ = ctable[s4 & 0xFF];
michael@0:             *dst++ = ctable[(s4 >> 8) & 0xFF];
michael@0:             *dst++ = ctable[(s4 >> 16) & 0xFF];
michael@0:             *dst++ = ctable[s4 >> 24];
michael@0: #else   // BENDIAN
michael@0:             *dst++ = ctable[s4 >> 24];
michael@0:             *dst++ = ctable[(s4 >> 16) & 0xFF];
michael@0:             *dst++ = ctable[(s4 >> 8) & 0xFF];
michael@0:             *dst++ = ctable[s4 & 0xFF];
michael@0: #endif
michael@0:         } while (--qcount);
michael@0:     } else {    // dst is on a 4byte boundary
michael@0:         uint32_t* ddst = reinterpret_cast<uint32_t*>(dst);
michael@0:         do {
michael@0:             uint32_t s4 = *qsrc++;
michael@0: #ifdef SK_CPU_LENDIAN
michael@0:             *ddst++ = (ctable[(s4 >> 8) & 0xFF] << 16) | ctable[s4 & 0xFF];
michael@0:             *ddst++ = (ctable[s4 >> 24] << 16) | ctable[(s4 >> 16) & 0xFF];
michael@0: #else   // BENDIAN
michael@0:             *ddst++ = (ctable[s4 >> 24] << 16) | ctable[(s4 >> 16) & 0xFF];
michael@0:             *ddst++ = (ctable[(s4 >> 8) & 0xFF] << 16) | ctable[s4 & 0xFF];
michael@0: #endif
michael@0:         } while (--qcount);
michael@0:         dst = reinterpret_cast<uint16_t*>(ddst);
michael@0:     }
michael@0:     src = reinterpret_cast<const uint8_t*>(qsrc);
michael@0:     count &= 3;
michael@0:     // catch any remaining (will be < 4)
michael@0:     while (--count >= 0) {
michael@0:         *dst++ = ctable[*src++];
michael@0:     }
michael@0: }
michael@0: 
michael@0: #define SkSPRITE_ROW_PROC(d, s, n, x, y)    blitrow_d16_si8(d, s, n, ctable)
michael@0: 
michael@0: #define SkSPRITE_CLASSNAME                  Sprite_D16_SIndex8_Opaque
michael@0: #define SkSPRITE_ARGS
michael@0: #define SkSPRITE_FIELDS
michael@0: #define SkSPRITE_INIT
michael@0: #define SkSPRITE_DST_TYPE                   uint16_t
michael@0: #define SkSPRITE_SRC_TYPE                   uint8_t
michael@0: #define SkSPRITE_DST_GETADDR                getAddr16
michael@0: #define SkSPRITE_SRC_GETADDR                getAddr8
michael@0: #define SkSPRITE_PREAMBLE(srcBM, x, y)      const uint16_t* ctable = srcBM.getColorTable()->lock16BitCache()
michael@0: #define SkSPRITE_BLIT_PIXEL(dst, src)       *dst = ctable[src]
michael@0: #define SkSPRITE_NEXT_ROW
michael@0: #define SkSPRITE_POSTAMBLE(srcBM)           srcBM.getColorTable()->unlock16BitCache()
michael@0: #include "SkSpriteBlitterTemplate.h"
michael@0: 
michael@0: #define SkSPRITE_CLASSNAME                  Sprite_D16_SIndex8_Blend
michael@0: #define SkSPRITE_ARGS                       , uint8_t alpha
michael@0: #define SkSPRITE_FIELDS                     uint8_t fSrcAlpha;
michael@0: #define SkSPRITE_INIT                       fSrcAlpha = alpha;
michael@0: #define SkSPRITE_DST_TYPE                   uint16_t
michael@0: #define SkSPRITE_SRC_TYPE                   uint8_t
michael@0: #define SkSPRITE_DST_GETADDR                getAddr16
michael@0: #define SkSPRITE_SRC_GETADDR                getAddr8
michael@0: #define SkSPRITE_PREAMBLE(srcBM, x, y)      const uint16_t* ctable = srcBM.getColorTable()->lock16BitCache(); unsigned src_scale = SkAlpha255To256(fSrcAlpha);
michael@0: #define SkSPRITE_BLIT_PIXEL(dst, src)       D16_S16_Blend_Pixel(dst, ctable[src], src_scale)
michael@0: #define SkSPRITE_NEXT_ROW
michael@0: #define SkSPRITE_POSTAMBLE(srcBM)           srcBM.getColorTable()->unlock16BitCache();
michael@0: #include "SkSpriteBlitterTemplate.h"
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: class Sprite_D16_S32_BlitRowProc : public SkSpriteBlitter {
michael@0: public:
michael@0:     Sprite_D16_S32_BlitRowProc(const SkBitmap& source)
michael@0:         : SkSpriteBlitter(source) {}
michael@0: 
michael@0:     // overrides
michael@0: 
michael@0:     virtual void setup(const SkBitmap& device, int left, int top,
michael@0:                        const SkPaint& paint) {
michael@0:         this->INHERITED::setup(device, left, top, paint);
michael@0: 
michael@0:         unsigned flags = 0;
michael@0: 
michael@0:         if (paint.getAlpha() < 0xFF) {
michael@0:             flags |= SkBlitRow::kGlobalAlpha_Flag;
michael@0:         }
michael@0:         if (!fSource->isOpaque()) {
michael@0:             flags |= SkBlitRow::kSrcPixelAlpha_Flag;
michael@0:         }
michael@0:         if (paint.isDither()) {
michael@0:             flags |= SkBlitRow::kDither_Flag;
michael@0:         }
michael@0:         fProc = SkBlitRow::Factory(flags, SkBitmap::kRGB_565_Config);
michael@0:     }
michael@0: 
michael@0:     virtual void blitRect(int x, int y, int width, int height) {
michael@0:         uint16_t* SK_RESTRICT dst = fDevice->getAddr16(x, y);
michael@0:         const SkPMColor* SK_RESTRICT src = fSource->getAddr32(x - fLeft,
michael@0:                                                               y - fTop);
michael@0:         size_t dstRB = fDevice->rowBytes();
michael@0:         size_t srcRB = fSource->rowBytes();
michael@0:         SkBlitRow::Proc proc = fProc;
michael@0:         U8CPU alpha = fPaint->getAlpha();
michael@0: 
michael@0:         while (--height >= 0) {
michael@0:             proc(dst, src, width, alpha, x, y);
michael@0:             y += 1;
michael@0:             dst = (uint16_t* SK_RESTRICT)((char*)dst + dstRB);
michael@0:             src = (const SkPMColor* SK_RESTRICT)((const char*)src + srcRB);
michael@0:         }
michael@0:     }
michael@0: 
michael@0: private:
michael@0:     SkBlitRow::Proc fProc;
michael@0: 
michael@0:     typedef SkSpriteBlitter INHERITED;
michael@0: };
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkSpriteBlitter* SkSpriteBlitter::ChooseD16(const SkBitmap& source, const SkPaint& paint,
michael@0:         SkTBlitterAllocator* allocator) {
michael@0: 
michael@0:     SkASSERT(allocator != NULL);
michael@0: 
michael@0:     if (paint.getMaskFilter() != NULL) { // may add cases for this
michael@0:         return NULL;
michael@0:     }
michael@0:     if (paint.getXfermode() != NULL) { // may add cases for this
michael@0:         return NULL;
michael@0:     }
michael@0:     if (paint.getColorFilter() != NULL) { // may add cases for this
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     SkSpriteBlitter* blitter = NULL;
michael@0:     unsigned alpha = paint.getAlpha();
michael@0: 
michael@0:     switch (source.colorType()) {
michael@0:         case kPMColor_SkColorType: {
michael@0:             blitter = allocator->createT<Sprite_D16_S32_BlitRowProc>(source);
michael@0:             break;
michael@0:         }
michael@0:         case kARGB_4444_SkColorType:
michael@0:             if (255 == alpha) {
michael@0:                 blitter = allocator->createT<Sprite_D16_S4444_Opaque>(source);
michael@0:             } else {
michael@0:                 blitter = allocator->createT<Sprite_D16_S4444_Blend>(source, alpha >> 4);
michael@0:             }
michael@0:             break;
michael@0:         case kRGB_565_SkColorType:
michael@0:             if (255 == alpha) {
michael@0:                 blitter = allocator->createT<Sprite_D16_S16_Opaque>(source);
michael@0:             } else {
michael@0:                 blitter = allocator->createT<Sprite_D16_S16_Blend>(source, alpha);
michael@0:             }
michael@0:             break;
michael@0:         case kIndex_8_SkColorType:
michael@0:             if (paint.isDither()) {
michael@0:                 // we don't support dither yet in these special cases
michael@0:                 break;
michael@0:             }
michael@0:             if (source.isOpaque()) {
michael@0:                 if (255 == alpha) {
michael@0:                     blitter = allocator->createT<Sprite_D16_SIndex8_Opaque>(source);
michael@0:                 } else {
michael@0:                     blitter = allocator->createT<Sprite_D16_SIndex8_Blend>(source, alpha);
michael@0:                 }
michael@0:             } else {
michael@0:                 if (255 == alpha) {
michael@0:                     blitter = allocator->createT<Sprite_D16_SIndex8A_Opaque>(source);
michael@0:                 } else {
michael@0:                     blitter = allocator->createT<Sprite_D16_SIndex8A_Blend>(source, alpha);
michael@0:                 }
michael@0:             }
michael@0:             break;
michael@0:         default:
michael@0:             break;
michael@0:     }
michael@0:     return blitter;
michael@0: }