aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/core/SkSpriteBlitter_RGB16.cpp
blob: 2c38f71f026452bb7ab8f4d940c1d0a7137d2258 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377

/*
 * 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
    virtual void blitRect(int x, int y, int width, int height) {
        uint16_t* SK_RESTRICT dst = fDevice->getAddr16(x, y);
        const uint16_t* SK_RESTRICT src = fSource->getAddr16(x - fLeft,
                                                             y - fTop);
        unsigned dstRB = fDevice->rowBytes();
        unsigned 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()->lockColors()
#define SkSPRITE_BLIT_PIXEL(dst, src)       D16_S32A_Opaque_Pixel(dst, ctable[src])
#define SkSPRITE_NEXT_ROW
#define SkSPRITE_POSTAMBLE(srcBM)           srcBM.getColorTable()->unlockColors(false)
#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()->lockColors(); 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)           srcBM.getColorTable()->unlockColors(false);
#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()->lock16BitCache()
#define SkSPRITE_BLIT_PIXEL(dst, src)       *dst = ctable[src]
#define SkSPRITE_NEXT_ROW
#define SkSPRITE_POSTAMBLE(srcBM)           srcBM.getColorTable()->unlock16BitCache()
#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()->lock16BitCache(); 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)           srcBM.getColorTable()->unlock16BitCache();
#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) {
        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::Factory(flags, SkBitmap::kRGB_565_Config);
    }
    
    virtual void blitRect(int x, int y, int width, int height) {
        uint16_t* SK_RESTRICT dst = fDevice->getAddr16(x, y);
        const SkPMColor* SK_RESTRICT src = fSource->getAddr32(x - fLeft,
                                                              y - fTop);
        unsigned dstRB = fDevice->rowBytes();
        unsigned srcRB = fSource->rowBytes();
        SkBlitRow::Proc 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::Proc fProc;
    
    typedef SkSpriteBlitter INHERITED;
};

///////////////////////////////////////////////////////////////////////////////

#include "SkTemplatesPriv.h"

SkSpriteBlitter* SkSpriteBlitter::ChooseD16(const SkBitmap& source,
                                            const SkPaint& paint,
                                            void* storage, size_t storageSize) {
    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;
    }

    SkSpriteBlitter* blitter = NULL;
    unsigned alpha = paint.getAlpha();

    switch (source.getConfig()) {
        case SkBitmap::kARGB_8888_Config:
            SK_PLACEMENT_NEW_ARGS(blitter, Sprite_D16_S32_BlitRowProc,
                                  storage, storageSize, (source));
            break;
        case SkBitmap::kARGB_4444_Config:
            if (255 == alpha) {
                SK_PLACEMENT_NEW_ARGS(blitter, Sprite_D16_S4444_Opaque,
                                      storage, storageSize, (source));
            } else {
                SK_PLACEMENT_NEW_ARGS(blitter, Sprite_D16_S4444_Blend,
                                    storage, storageSize, (source, alpha >> 4));
            }
            break;
        case SkBitmap::kRGB_565_Config:
            if (255 == alpha) {
                SK_PLACEMENT_NEW_ARGS(blitter, Sprite_D16_S16_Opaque,
                                      storage, storageSize, (source));
            } else {
                SK_PLACEMENT_NEW_ARGS(blitter, Sprite_D16_S16_Blend,
                                      storage, storageSize, (source, alpha));
            }
            break;
        case SkBitmap::kIndex8_Config:
            if (paint.isDither()) {
                // we don't support dither yet in these special cases
                break;
            }
            if (source.isOpaque()) {
                if (255 == alpha) {
                    SK_PLACEMENT_NEW_ARGS(blitter, Sprite_D16_SIndex8_Opaque,
                                          storage, storageSize, (source));
                } else {
                    SK_PLACEMENT_NEW_ARGS(blitter, Sprite_D16_SIndex8_Blend,
                                         storage, storageSize, (source, alpha));
                }
            } else {
                if (255 == alpha) {
                    SK_PLACEMENT_NEW_ARGS(blitter, Sprite_D16_SIndex8A_Opaque,
                                          storage, storageSize, (source));
                } else {
                    SK_PLACEMENT_NEW_ARGS(blitter, Sprite_D16_SIndex8A_Blend,
                                         storage, storageSize, (source, alpha));
                }
            }
            break;
        default:
            break;
    }
    return blitter;
}