OpenTTD Source: src/blitter/32bpp_sse_func.hpp Source File

OpenTTD Source 12.2

32bpp_sse_func.hpp
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1 /*
2 * This file is part of OpenTTD.
3 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
4 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
5 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
6 */
7
10 #ifndef BLITTER_32BPP_SSE_FUNC_HPP
11 #define BLITTER_32BPP_SSE_FUNC_HPP
12
13 #ifdef WITH_SSE
14
15 static inline void InsertFirstUint32(const uint32 value, __m128i &into)
16 {
17 #if (SSE_VERSION >= 4)
18 into = _mm_insert_epi32(into, value, 0);
19 #else
20 into = _mm_insert_epi16(into, value, 0);
21 into = _mm_insert_epi16(into, value >> 16, 1);
22 #endif
23 }
24
25 static inline void InsertSecondUint32(const uint32 value, __m128i &into)
26 {
27 #if (SSE_VERSION >= 4)
28 into = _mm_insert_epi32(into, value, 1);
29 #else
30 into = _mm_insert_epi16(into, value, 2);
31 into = _mm_insert_epi16(into, value >> 16, 3);
32 #endif
33 }
34
35 static inline void LoadUint64(const uint64 value, __m128i &into)
36 {
37 #ifdef POINTER_IS_64BIT
38 into = _mm_cvtsi64_si128(value);
39 #else
40 #if (SSE_VERSION >= 4)
41 into = _mm_cvtsi32_si128(value);
42 InsertSecondUint32(value >> 32, into);
43 #else
44 (*(um128i*) &into).m128i_u64[0] = value;
45 #endif
46 #endif
47 }
48
49 static inline __m128i PackUnsaturated(__m128i from, const __m128i &mask)
50 {
51 #if (SSE_VERSION == 2)
52 from = _mm_and_si128(from, mask); // PAND, wipe high bytes to keep low bytes when packing
53 return _mm_packus_epi16(from, from); // PACKUSWB, pack 2 colours (with saturation)
54 #else
55 return _mm_shuffle_epi8(from, mask);
56 #endif
57 }
58
59 static inline __m128i DistributeAlpha(const __m128i from, const __m128i &mask)
60 {
61 #if (SSE_VERSION == 2)
62 __m128i alphaAB = _mm_shufflelo_epi16(from, 0x3F); // PSHUFLW, put alpha1 in front of each rgb1
63 return _mm_shufflehi_epi16(alphaAB, 0x3F); // PSHUFHW, put alpha2 in front of each rgb2
64 #else
65 return _mm_shuffle_epi8(from, mask);
66 #endif
67 }
68
69 static inline __m128i AlphaBlendTwoPixels(__m128i src, __m128i dst, const __m128i &distribution_mask, const __m128i &pack_mask)
70 {
71 __m128i srcAB = _mm_unpacklo_epi8(src, _mm_setzero_si128()); // PUNPCKLBW, expand each uint8 into uint16
72 __m128i dstAB = _mm_unpacklo_epi8(dst, _mm_setzero_si128());
73
74 __m128i alphaAB = _mm_cmpgt_epi16(srcAB, _mm_setzero_si128()); // PCMPGTW, if (alpha > 0) a++;
75 alphaAB = _mm_srli_epi16(alphaAB, 15);
76 alphaAB = _mm_add_epi16(alphaAB, srcAB);
77 alphaAB = DistributeAlpha(alphaAB, distribution_mask);
78
79 srcAB = _mm_sub_epi16(srcAB, dstAB); // PSUBW, (r - Cr)
80 srcAB = _mm_mullo_epi16(srcAB, alphaAB); // PMULLW, a*(r - Cr)
81 srcAB = _mm_srli_epi16(srcAB, 8); // PSRLW, a*(r - Cr)/256
82 srcAB = _mm_add_epi16(srcAB, dstAB); // PADDW, a*(r - Cr)/256 + Cr
83 return PackUnsaturated(srcAB, pack_mask);
84 }
85
86 /* Darken 2 pixels.
87 * rgb = rgb * ((256/4) * 4 - (alpha/4)) / ((256/4) * 4)
88 */
89 static inline __m128i DarkenTwoPixels(__m128i src, __m128i dst, const __m128i &distribution_mask, const __m128i &tr_nom_base)
90 {
91 __m128i srcAB = _mm_unpacklo_epi8(src, _mm_setzero_si128());
92 __m128i dstAB = _mm_unpacklo_epi8(dst, _mm_setzero_si128());
93 __m128i alphaAB = DistributeAlpha(srcAB, distribution_mask);
94 alphaAB = _mm_srli_epi16(alphaAB, 2); // Reduce to 64 levels of shades so the max value fits in 16 bits.
95 __m128i nom = _mm_sub_epi16(tr_nom_base, alphaAB);
96 dstAB = _mm_mullo_epi16(dstAB, nom);
97 dstAB = _mm_srli_epi16(dstAB, 8);
98 return _mm_packus_epi16(dstAB, dstAB);
99 }
100
101 IGNORE_UNINITIALIZED_WARNING_START
102 static Colour ReallyAdjustBrightness(Colour colour, uint8 brightness)
103 {
104 uint64 c16 = colour.b | (uint64) colour.g << 16 | (uint64) colour.r << 32;
105 c16 *= brightness;
106 uint64 c16_ob = c16; // Helps out of order execution.
107 c16 /= Blitter_32bppBase::DEFAULT_BRIGHTNESS;
108 c16 &= 0x01FF01FF01FFULL;
109
110 /* Sum overbright (maximum for each rgb is 508, 9 bits, -255 is changed in -256 so we just have to take the 8 lower bits into account). */
111 c16_ob = (((c16_ob >> (8 + 7)) & 0x0100010001ULL) * 0xFF) & c16;
112 const uint ob = ((uint16) c16_ob + (uint16) (c16_ob >> 16) + (uint16) (c16_ob >> 32)) / 2;
113
114 const uint32 alpha32 = colour.data & 0xFF000000;
115 __m128i ret;
116 LoadUint64(c16, ret);
117 if (ob != 0) {
118 __m128i ob128 = _mm_cvtsi32_si128(ob);
119 ob128 = _mm_shufflelo_epi16(ob128, 0xC0);
120 __m128i white = OVERBRIGHT_VALUE_MASK;
121 __m128i c128 = ret;
122 ret = _mm_subs_epu16(white, c128); // PSUBUSW, (255 - rgb)
123 ret = _mm_mullo_epi16(ret, ob128); // PMULLW, ob*(255 - rgb)
124 ret = _mm_srli_epi16(ret, 8); // PSRLW, ob*(255 - rgb)/256
125 ret = _mm_add_epi16(ret, c128); // PADDW, ob*(255 - rgb)/256 + rgb
126 }
127
128 ret = _mm_packus_epi16(ret, ret); // PACKUSWB, saturate and pack.
129 return alpha32 | _mm_cvtsi128_si32(ret);
130 }
131 IGNORE_UNINITIALIZED_WARNING_STOP
132
136 static inline Colour AdjustBrightneSSE(Colour colour, uint8 brightness)
137 {
138 /* Shortcut for normal brightness. */
139 if (brightness == Blitter_32bppBase::DEFAULT_BRIGHTNESS) return colour;
140
141 return ReallyAdjustBrightness(colour, brightness);
142 }
143
144 static inline __m128i AdjustBrightnessOfTwoPixels(__m128i from, uint32 brightness)
145 {
146 #if (SSE_VERSION < 3)
147 NOT_REACHED();
148 #else
149 /* The following dataflow differs from the one of AdjustBrightness() only for alpha.
150 * In order to keep alpha in colAB, insert a 1 in a unused brightness byte (a*1->a).
151 * OK, not a 1 but DEFAULT_BRIGHTNESS to compensate the div.
152 */
153 brightness &= 0xFF00FF00;
154 brightness += Blitter_32bppBase::DEFAULT_BRIGHTNESS;
155
156 __m128i colAB = _mm_unpacklo_epi8(from, _mm_setzero_si128());
157 __m128i briAB = _mm_cvtsi32_si128(brightness);
158 briAB = _mm_shuffle_epi8(briAB, BRIGHTNESS_LOW_CONTROL_MASK); // DEFAULT_BRIGHTNESS in 0, 0x00 in 2.
159 colAB = _mm_mullo_epi16(colAB, briAB);
160 __m128i colAB_ob = _mm_srli_epi16(colAB, 8 + 7);
161 colAB = _mm_srli_epi16(colAB, 7);
162
163 /* Sum overbright.
164 * Maximum for each rgb is 508 => 9 bits. The highest bit tells if there is overbright.
165 * -255 is changed in -256 so we just have to take the 8 lower bits into account.
166 */
167 colAB = _mm_and_si128(colAB, BRIGHTNESS_DIV_CLEANER);
168 colAB_ob = _mm_and_si128(colAB_ob, OVERBRIGHT_PRESENCE_MASK);
169 colAB_ob = _mm_mullo_epi16(colAB_ob, OVERBRIGHT_VALUE_MASK);
170 colAB_ob = _mm_and_si128(colAB_ob, colAB);
171 __m128i obAB = _mm_hadd_epi16(_mm_hadd_epi16(colAB_ob, _mm_setzero_si128()), _mm_setzero_si128());
172
173 obAB = _mm_srli_epi16(obAB, 1); // Reduce overbright strength.
174 obAB = _mm_shuffle_epi8(obAB, OVERBRIGHT_CONTROL_MASK);
175 __m128i retAB = OVERBRIGHT_VALUE_MASK; // ob_mask is equal to white.
176 retAB = _mm_subs_epu16(retAB, colAB); // (255 - rgb)
177 retAB = _mm_mullo_epi16(retAB, obAB); // ob*(255 - rgb)
178 retAB = _mm_srli_epi16(retAB, 8); // ob*(255 - rgb)/256
179 retAB = _mm_add_epi16(retAB, colAB); // ob*(255 - rgb)/256 + rgb
180
181 return _mm_packus_epi16(retAB, retAB);
182 #endif
183 }
184
185 #if FULL_ANIMATION == 0
186
193 IGNORE_UNINITIALIZED_WARNING_START
194 template <BlitterMode mode, Blitter_32bppSSE2::ReadMode read_mode, Blitter_32bppSSE2::BlockType bt_last, bool translucent>
195 #if (SSE_VERSION == 2)
196 inline void Blitter_32bppSSE2::Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom)
197 #elif (SSE_VERSION == 3)
198 inline void Blitter_32bppSSSE3::Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom)
199 #elif (SSE_VERSION == 4)
200 inline void Blitter_32bppSSE4::Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom)
201 #endif
202 {
203 const byte * const remap = bp->remap;
204 Colour *dst_line = (Colour *) bp->dst + bp->top * bp->pitch + bp->left;
205 int effective_width = bp->width;
206
207 /* Find where to start reading in the source sprite. */
208 const SpriteData * const sd = (const SpriteData *) bp->sprite;
209 const SpriteInfo * const si = &sd->infos[zoom];
210 const MapValue *src_mv_line = (const MapValue *) &sd->data[si->mv_offset] + bp->skip_top * si->sprite_width;
211 const Colour *src_rgba_line = (const Colour *) ((const byte *) &sd->data[si->sprite_offset] + bp->skip_top * si->sprite_line_size);
212
213 if (read_mode != RM_WITH_MARGIN) {
214 src_rgba_line += bp->skip_left;
215 src_mv_line += bp->skip_left;
216 }
217 const MapValue *src_mv = src_mv_line;
218
219 /* Load these variables into register before loop. */
220 #if (SSE_VERSION == 2)
221 const __m128i clear_hi = CLEAR_HIGH_BYTE_MASK;
222 #define ALPHA_BLEND_PARAM_1 clear_hi
223 #define ALPHA_BLEND_PARAM_2 clear_hi
224 #define DARKEN_PARAM_1 tr_nom_base
225 #define DARKEN_PARAM_2 tr_nom_base
226 #else
227 const __m128i a_cm = ALPHA_CONTROL_MASK;
228 const __m128i pack_low_cm = PACK_LOW_CONTROL_MASK;
229 #define ALPHA_BLEND_PARAM_1 a_cm
230 #define ALPHA_BLEND_PARAM_2 pack_low_cm
231 #define DARKEN_PARAM_1 a_cm
232 #define DARKEN_PARAM_2 tr_nom_base
233 #endif
234 const __m128i tr_nom_base = TRANSPARENT_NOM_BASE;
235
236 for (int y = bp->height; y != 0; y--) {
237 Colour *dst = dst_line;
238 const Colour *src = src_rgba_line + META_LENGTH;
239 if (mode == BM_COLOUR_REMAP || mode == BM_CRASH_REMAP) src_mv = src_mv_line;
240
241 if (read_mode == RM_WITH_MARGIN) {
242 assert(bt_last == BT_NONE); // or you must ensure block type is preserved
243 src += src_rgba_line[0].data;
244 dst += src_rgba_line[0].data;
245 if (mode == BM_COLOUR_REMAP || mode == BM_CRASH_REMAP) src_mv += src_rgba_line[0].data;
246 const int width_diff = si->sprite_width - bp->width;
247 effective_width = bp->width - (int) src_rgba_line[0].data;
248 const int delta_diff = (int) src_rgba_line[1].data - width_diff;
249 const int new_width = effective_width - delta_diff;
250 effective_width = delta_diff > 0 ? new_width : effective_width;
251 if (effective_width <= 0) goto next_line;
252 }
253
254 switch (mode) {
255 default:
256 if (!translucent) {
257 for (uint x = (uint) effective_width; x > 0; x--) {
258 if (src->a) *dst = *src;
259 src++;
260 dst++;
261 }
262 break;
263 }
264
265 for (uint x = (uint) effective_width / 2; x > 0; x--) {
266 __m128i srcABCD = _mm_loadl_epi64((const __m128i*) src);
267 __m128i dstABCD = _mm_loadl_epi64((__m128i*) dst);
268 _mm_storel_epi64((__m128i*) dst, AlphaBlendTwoPixels(srcABCD, dstABCD, ALPHA_BLEND_PARAM_1, ALPHA_BLEND_PARAM_2));
269 src += 2;
270 dst += 2;
271 }
272
273 if ((bt_last == BT_NONE && effective_width & 1) || bt_last == BT_ODD) {
274 __m128i srcABCD = _mm_cvtsi32_si128(src->data);
275 __m128i dstABCD = _mm_cvtsi32_si128(dst->data);
276 dst->data = _mm_cvtsi128_si32(AlphaBlendTwoPixels(srcABCD, dstABCD, ALPHA_BLEND_PARAM_1, ALPHA_BLEND_PARAM_2));
277 }
278 break;
279
280 case BM_COLOUR_REMAP:
281 #if (SSE_VERSION >= 3)
282 for (uint x = (uint) effective_width / 2; x > 0; x--) {
283 __m128i srcABCD = _mm_loadl_epi64((const __m128i*) src);
284 __m128i dstABCD = _mm_loadl_epi64((__m128i*) dst);
285 uint32 mvX2 = *((uint32 *) const_cast<MapValue *>(src_mv));
286
287 /* Remap colours. */
288 if (mvX2 & 0x00FF00FF) {
289 #define CMOV_REMAP(m_colour, m_colour_init, m_src, m_m) \
290 /* Written so the compiler uses CMOV. */ \
291 Colour m_colour = m_colour_init; \
292 { \
293 const Colour srcm = (Colour) (m_src); \
294 const uint m = (byte) (m_m); \
295 const uint r = remap[m]; \
296 const Colour cmap = (this->LookupColourInPalette(r).data & 0x00FFFFFF) | (srcm.data & 0xFF000000); \
297 m_colour = r == 0 ? m_colour : cmap; \
298 m_colour = m != 0 ? m_colour : srcm; \
299 }
300 #ifdef POINTER_IS_64BIT
301 uint64 srcs = _mm_cvtsi128_si64(srcABCD);
302 uint64 remapped_src = 0;
303 CMOV_REMAP(c0, 0, srcs, mvX2);
304 remapped_src = c0.data;
305 CMOV_REMAP(c1, 0, srcs >> 32, mvX2 >> 16);
306 remapped_src |= (uint64) c1.data << 32;
307 srcABCD = _mm_cvtsi64_si128(remapped_src);
308 #else
309 Colour remapped_src[2];
310 CMOV_REMAP(c0, 0, _mm_cvtsi128_si32(srcABCD), mvX2);
311 remapped_src[0] = c0.data;
312 CMOV_REMAP(c1, 0, src[1], mvX2 >> 16);
313 remapped_src[1] = c1.data;
314 srcABCD = _mm_loadl_epi64((__m128i*) &remapped_src);
315 #endif
316
317 if ((mvX2 & 0xFF00FF00) != 0x80008000) srcABCD = AdjustBrightnessOfTwoPixels(srcABCD, mvX2);
318 }
319
320 /* Blend colours. */
321 _mm_storel_epi64((__m128i *) dst, AlphaBlendTwoPixels(srcABCD, dstABCD, ALPHA_BLEND_PARAM_1, ALPHA_BLEND_PARAM_2));
322 dst += 2;
323 src += 2;
324 src_mv += 2;
325 }
326
327 if ((bt_last == BT_NONE && effective_width & 1) || bt_last == BT_ODD) {
328 #else
329 for (uint x = (uint) effective_width; x > 0; x--) {
330 #endif
331 /* In case the m-channel is zero, do not remap this pixel in any way. */
332 __m128i srcABCD;
333 if (src_mv->m) {
334 const uint r = remap[src_mv->m];
335 if (r != 0) {
336 Colour remapped_colour = AdjustBrightneSSE(this->LookupColourInPalette(r), src_mv->v);
337 if (src->a == 255) {
338 *dst = remapped_colour;
339 } else {
340 remapped_colour.a = src->a;
341 srcABCD = _mm_cvtsi32_si128(remapped_colour.data);
342 goto bmcr_alpha_blend_single;
343 }
344 }
345 } else {
346 srcABCD = _mm_cvtsi32_si128(src->data);
347 if (src->a < 255) {
348 bmcr_alpha_blend_single:
349 __m128i dstABCD = _mm_cvtsi32_si128(dst->data);
350 srcABCD = AlphaBlendTwoPixels(srcABCD, dstABCD, ALPHA_BLEND_PARAM_1, ALPHA_BLEND_PARAM_2);
351 }
352 dst->data = _mm_cvtsi128_si32(srcABCD);
353 }
354 #if (SSE_VERSION == 2)
355 src_mv++;
356 dst++;
357 src++;
358 #endif
359 }
360 break;
361
362 case BM_TRANSPARENT:
363 /* Make the current colour a bit more black, so it looks like this image is transparent. */
364 for (uint x = (uint) bp->width / 2; x > 0; x--) {
365 __m128i srcABCD = _mm_loadl_epi64((const __m128i*) src);
366 __m128i dstABCD = _mm_loadl_epi64((__m128i*) dst);
367 _mm_storel_epi64((__m128i *) dst, DarkenTwoPixels(srcABCD, dstABCD, DARKEN_PARAM_1, DARKEN_PARAM_2));
368 src += 2;
369 dst += 2;
370 }
371
372 if ((bt_last == BT_NONE && bp->width & 1) || bt_last == BT_ODD) {
373 __m128i srcABCD = _mm_cvtsi32_si128(src->data);
374 __m128i dstABCD = _mm_cvtsi32_si128(dst->data);
375 dst->data = _mm_cvtsi128_si32(DarkenTwoPixels(srcABCD, dstABCD, DARKEN_PARAM_1, DARKEN_PARAM_2));
376 }
377 break;
378
379 case BM_CRASH_REMAP:
380 for (uint x = (uint) bp->width; x > 0; x--) {
381 if (src_mv->m == 0) {
382 if (src->a != 0) {
383 uint8 g = MakeDark(src->r, src->g, src->b);
384 *dst = ComposeColourRGBA(g, g, g, src->a, *dst);
385 }
386 } else {
387 uint r = remap[src_mv->m];
388 if (r != 0) *dst = ComposeColourPANoCheck(this->AdjustBrightness(this->LookupColourInPalette(r), src_mv->v), src->a, *dst);
389 }
390 src_mv++;
391 dst++;
392 src++;
393 }
394 break;
395
396 case BM_BLACK_REMAP:
397 for (uint x = (uint) bp->width; x > 0; x--) {
398 if (src->a != 0) {
399 *dst = Colour(0, 0, 0);
400 }
401 src_mv++;
402 dst++;
403 src++;
404 }
405 break;
406 }
407
408 next_line:
409 if (mode == BM_COLOUR_REMAP || mode == BM_CRASH_REMAP) src_mv_line += si->sprite_width;
410 src_rgba_line = (const Colour*) ((const byte*) src_rgba_line + si->sprite_line_size);
411 dst_line += bp->pitch;
412 }
413 }
414 IGNORE_UNINITIALIZED_WARNING_STOP
415
423 #if (SSE_VERSION == 2)
424 void Blitter_32bppSSE2::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
425 #elif (SSE_VERSION == 3)
426 void Blitter_32bppSSSE3::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
427 #elif (SSE_VERSION == 4)
428 void Blitter_32bppSSE4::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
429 #endif
430 {
431 switch (mode) {
432 default: {
433 if (bp->skip_left != 0 || bp->width <= MARGIN_NORMAL_THRESHOLD) {
434 bm_normal:
435 const BlockType bt_last = (BlockType) (bp->width & 1);
436 switch (bt_last) {
437 default: Draw<BM_NORMAL, RM_WITH_SKIP, BT_EVEN, true>(bp, zoom); return;
438 case BT_ODD: Draw<BM_NORMAL, RM_WITH_SKIP, BT_ODD, true>(bp, zoom); return;
439 }
440 } else {
441 if (((const Blitter_32bppSSE_Base::SpriteData *) bp->sprite)->flags & SF_TRANSLUCENT) {
442 Draw<BM_NORMAL, RM_WITH_MARGIN, BT_NONE, true>(bp, zoom);
443 } else {
444 Draw<BM_NORMAL, RM_WITH_MARGIN, BT_NONE, false>(bp, zoom);
445 }
446 return;
447 }
448 break;
449 }
450 case BM_COLOUR_REMAP:
451 if (((const Blitter_32bppSSE_Base::SpriteData *) bp->sprite)->flags & SF_NO_REMAP) goto bm_normal;
452 if (bp->skip_left != 0 || bp->width <= MARGIN_REMAP_THRESHOLD) {
453 Draw<BM_COLOUR_REMAP, RM_WITH_SKIP, BT_NONE, true>(bp, zoom); return;
454 } else {
455 Draw<BM_COLOUR_REMAP, RM_WITH_MARGIN, BT_NONE, true>(bp, zoom); return;
456 }
457 case BM_TRANSPARENT: Draw<BM_TRANSPARENT, RM_NONE, BT_NONE, true>(bp, zoom); return;
458 case BM_CRASH_REMAP: Draw<BM_CRASH_REMAP, RM_NONE, BT_NONE, true>(bp, zoom); return;
459 case BM_BLACK_REMAP: Draw<BM_BLACK_REMAP, RM_NONE, BT_NONE, true>(bp, zoom); return;
460 }
461 }
462 #endif /* FULL_ANIMATION */
463
464 #endif /* WITH_SSE */
465 #endif /* BLITTER_32BPP_SSE_FUNC_HPP */
Colour::data
uint32 data
Conversion of the channel information to a 32 bit number.
Definition: gfx_type.h:164
Blitter::BlitterParams::top
int top
The top offset in the 'dst' in pixels to start drawing.
Definition: base.hpp:42
BM_TRANSPARENT
@ BM_TRANSPARENT
Perform transparency colour remapping.
Definition: base.hpp:20
Blitter::BlitterParams::skip_left
int skip_left
How much pixels of the source to skip on the left (based on zoom of dst)
Definition: base.hpp:35
BlitterMode
BlitterMode
The modes of blitting we can do.
Definition: base.hpp:17
Blitter::BlitterParams::width
int width
The width in pixels that needs to be drawn to dst.
Definition: base.hpp:37
Blitter::BlitterParams::dst
void * dst
Destination buffer.
Definition: base.hpp:44
ZoomLevel
ZoomLevel
All zoom levels we know.
Definition: zoom_type.h:21
Blitter::BlitterParams::pitch
int pitch
The pitch of the destination buffer.
Definition: base.hpp:45
Blitter::BlitterParams::sprite
const void * sprite
Pointer to the sprite how ever the encoder stored it.
Definition: base.hpp:32
BM_COLOUR_REMAP
@ BM_COLOUR_REMAP
Perform a colour remapping.
Definition: base.hpp:19
BM_CRASH_REMAP
@ BM_CRASH_REMAP
Perform a crash remapping.
Definition: base.hpp:21
BM_BLACK_REMAP
@ BM_BLACK_REMAP
Perform remapping to a completely blackened sprite.
Definition: base.hpp:22
Colour
Structure to access the alpha, red, green, and blue channels from a 32 bit number.
Definition: gfx_type.h:163
Colour::a
uint8 a
colour channels in LE order
Definition: gfx_type.h:171
Blitter::BlitterParams::left
int left
The left offset in the 'dst' in pixels to start drawing.
Definition: base.hpp:41
Blitter::BlitterParams
Parameters related to blitting.
Definition: base.hpp:31
Blitter::BlitterParams::height
int height
The height in pixels that needs to be drawn to dst.
Definition: base.hpp:38
Blitter::BlitterParams::skip_top
int skip_top
How much pixels of the source to skip on the top (based on zoom of dst)
Definition: base.hpp:36
Blitter::BlitterParams::remap
const byte * remap
XXX – Temporary storage for remap array.
Definition: base.hpp:33