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/project/jni/sdl-1.3/src/video/SDL_blit.h

https://github.com/aichunyu/FFPlayer
C Header | 495 lines | 418 code | 32 blank | 45 comment | 36 complexity | 64d191cb0c914f22c031c4ca3d22ac1f MD5 | raw file
  1/*
  2  Simple DirectMedia Layer
  3  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
  4
  5  This software is provided 'as-is', without any express or implied
  6  warranty.  In no event will the authors be held liable for any damages
  7  arising from the use of this software.
  8
  9  Permission is granted to anyone to use this software for any purpose,
 10  including commercial applications, and to alter it and redistribute it
 11  freely, subject to the following restrictions:
 12
 13  1. The origin of this software must not be misrepresented; you must not
 14     claim that you wrote the original software. If you use this software
 15     in a product, an acknowledgment in the product documentation would be
 16     appreciated but is not required.
 17  2. Altered source versions must be plainly marked as such, and must not be
 18     misrepresented as being the original software.
 19  3. This notice may not be removed or altered from any source distribution.
 20*/
 21#include "SDL_config.h"
 22
 23#ifndef _SDL_blit_h
 24#define _SDL_blit_h
 25
 26#include "SDL_cpuinfo.h"
 27#include "SDL_endian.h"
 28#include "SDL_surface.h"
 29
 30/* Table to do pixel byte expansion */
 31extern Uint8* SDL_expand_byte[9];
 32
 33/* SDL blit copy flags */
 34#define SDL_COPY_MODULATE_COLOR     0x00000001
 35#define SDL_COPY_MODULATE_ALPHA     0x00000002
 36#define SDL_COPY_BLEND              0x00000010
 37#define SDL_COPY_ADD                0x00000020
 38#define SDL_COPY_MOD                0x00000040
 39#define SDL_COPY_COLORKEY           0x00000100
 40#define SDL_COPY_NEAREST            0x00000200
 41#define SDL_COPY_RLE_DESIRED        0x00001000
 42#define SDL_COPY_RLE_COLORKEY       0x00002000
 43#define SDL_COPY_RLE_ALPHAKEY       0x00004000
 44#define SDL_COPY_RLE_MASK           (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY)
 45
 46/* SDL blit CPU flags */
 47#define SDL_CPU_ANY                 0x00000000
 48#define SDL_CPU_MMX                 0x00000001
 49#define SDL_CPU_3DNOW               0x00000002
 50#define SDL_CPU_SSE                 0x00000004
 51#define SDL_CPU_SSE2                0x00000008
 52#define SDL_CPU_ALTIVEC_PREFETCH    0x00000010
 53#define SDL_CPU_ALTIVEC_NOPREFETCH  0x00000020
 54
 55typedef struct
 56{
 57    Uint8 *src;
 58    int src_w, src_h;
 59    int src_pitch;
 60    int src_skip;
 61    Uint8 *dst;
 62    int dst_w, dst_h;
 63    int dst_pitch;
 64    int dst_skip;
 65    SDL_PixelFormat *src_fmt;
 66    SDL_PixelFormat *dst_fmt;
 67    Uint8 *table;
 68    int flags;
 69    Uint32 colorkey;
 70    Uint8 r, g, b, a;
 71} SDL_BlitInfo;
 72
 73typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info);
 74
 75typedef struct
 76{
 77    Uint32 src_format;
 78    Uint32 dst_format;
 79    int flags;
 80    int cpu;
 81    SDL_BlitFunc func;
 82} SDL_BlitFuncEntry;
 83
 84/* Blit mapping definition */
 85typedef struct SDL_BlitMap
 86{
 87    SDL_Surface *dst;
 88    int identity;
 89    SDL_blit blit;
 90    void *data;
 91    SDL_BlitInfo info;
 92
 93    /* the version count matches the destination; mismatch indicates
 94       an invalid mapping */
 95    Uint32 dst_palette_version;
 96    Uint32 src_palette_version;
 97} SDL_BlitMap;
 98
 99/* Functions found in SDL_blit.c */
100extern int SDL_CalculateBlit(SDL_Surface * surface);
101
102/* Functions found in SDL_blit_*.c */
103extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface);
104extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface);
105extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface);
106extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface);
107
108/*
109 * Useful macros for blitting routines
110 */
111
112#if defined(__GNUC__)
113#define DECLARE_ALIGNED(t,v,a)  t __attribute__((aligned(a))) v
114#elif defined(_MSC_VER)
115#define DECLARE_ALIGNED(t,v,a)  __declspec(align(a)) t v
116#else
117#define DECLARE_ALIGNED(t,v,a)  t v
118#endif
119
120/* Load pixel of the specified format from a buffer and get its R-G-B values */
121#define RGB_FROM_PIXEL(Pixel, fmt, r, g, b)				\
122{									\
123	r = SDL_expand_byte[fmt->Rloss][((Pixel&fmt->Rmask)>>fmt->Rshift)]; \
124	g = SDL_expand_byte[fmt->Gloss][((Pixel&fmt->Gmask)>>fmt->Gshift)]; \
125	b = SDL_expand_byte[fmt->Bloss][((Pixel&fmt->Bmask)>>fmt->Bshift)]; \
126}
127#define RGB_FROM_RGB565(Pixel, r, g, b)					\
128{									\
129	r = SDL_expand_byte[3][((Pixel&0xF800)>>11)];		 			\
130	g = SDL_expand_byte[2][((Pixel&0x07E0)>>5)]; 					\
131	b = SDL_expand_byte[3][(Pixel&0x001F)]; 					\
132}
133#define RGB_FROM_RGB555(Pixel, r, g, b)					\
134{									\
135	r = SDL_expand_byte[3][((Pixel&0x7C00)>>10)];		 			\
136	g = SDL_expand_byte[3][((Pixel&0x03E0)>>5)]; 					\
137	b = SDL_expand_byte[3][(Pixel&0x001F)]; 					\
138}
139#define RGB_FROM_RGB888(Pixel, r, g, b)					\
140{									\
141	r = ((Pixel&0xFF0000)>>16);		 			\
142	g = ((Pixel&0xFF00)>>8);		 			\
143	b = (Pixel&0xFF);			 			\
144}
145#define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel)				   \
146do {									   \
147	switch (bpp) {							   \
148		case 2:							   \
149			Pixel = *((Uint16 *)(buf));			   \
150		break;							   \
151									   \
152		case 3: {						   \
153		        Uint8 *B = (Uint8 *)(buf);			   \
154			if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {		   \
155			        Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
156			} else {					   \
157			        Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
158			}						   \
159		}							   \
160		break;							   \
161									   \
162		case 4:							   \
163			Pixel = *((Uint32 *)(buf));			   \
164		break;							   \
165									   \
166		default:						   \
167		        Pixel = 0; /* stop gcc complaints */		   \
168		break;							   \
169	}								   \
170} while (0)
171
172#define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b)			   \
173do {									   \
174	switch (bpp) {							   \
175		case 2:							   \
176			Pixel = *((Uint16 *)(buf));			   \
177			RGB_FROM_PIXEL(Pixel, fmt, r, g, b);		   \
178		break;							   \
179									   \
180		case 3:	{						   \
181            Pixel = 0;                  \
182                        if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {		   \
183			        r = *((buf)+fmt->Rshift/8);		   \
184				g = *((buf)+fmt->Gshift/8);		   \
185				b = *((buf)+fmt->Bshift/8);		   \
186			} else {					   \
187			        r = *((buf)+2-fmt->Rshift/8);		   \
188				g = *((buf)+2-fmt->Gshift/8);		   \
189				b = *((buf)+2-fmt->Bshift/8);		   \
190			}						   \
191		}							   \
192		break;							   \
193									   \
194		case 4:							   \
195			Pixel = *((Uint32 *)(buf));			   \
196			RGB_FROM_PIXEL(Pixel, fmt, r, g, b);		   \
197		break;							   \
198									   \
199		default:						   \
200                /* stop gcc complaints */		   \
201		        Pixel = 0;              \
202                r = g = b = 0;          \
203		break;							   \
204	}								   \
205} while (0)
206
207/* Assemble R-G-B values into a specified pixel format and store them */
208#define PIXEL_FROM_RGB(Pixel, fmt, r, g, b)				\
209{									\
210	Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)|				\
211		((g>>fmt->Gloss)<<fmt->Gshift)|				\
212		((b>>fmt->Bloss)<<fmt->Bshift)| \
213        fmt->Amask;				\
214}
215#define RGB565_FROM_RGB(Pixel, r, g, b)					\
216{									\
217	Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3);			\
218}
219#define RGB555_FROM_RGB(Pixel, r, g, b)					\
220{									\
221	Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3);			\
222}
223#define RGB888_FROM_RGB(Pixel, r, g, b)					\
224{									\
225	Pixel = (r<<16)|(g<<8)|b;					\
226}
227#define ARGB8888_FROM_RGBA(Pixel, r, g, b, a)				\
228{									\
229	Pixel = (a<<24)|(r<<16)|(g<<8)|b;				\
230}
231#define RGBA8888_FROM_RGBA(Pixel, r, g, b, a)				\
232{									\
233	Pixel = (r<<24)|(g<<16)|(b<<8)|a;				\
234}
235#define ABGR8888_FROM_RGBA(Pixel, r, g, b, a)				\
236{									\
237	Pixel = (a<<24)|(b<<16)|(g<<8)|r;				\
238}
239#define BGRA8888_FROM_RGBA(Pixel, r, g, b, a)				\
240{									\
241	Pixel = (b<<24)|(g<<16)|(r<<8)|a;				\
242}
243#define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) 				\
244{									\
245	switch (bpp) {							\
246		case 2: {						\
247			Uint16 Pixel;					\
248									\
249			PIXEL_FROM_RGB(Pixel, fmt, r, g, b);		\
250			*((Uint16 *)(buf)) = Pixel;		\
251		}							\
252		break;							\
253									\
254		case 3: {						\
255                        if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {		\
256			        *((buf)+fmt->Rshift/8) = r;		\
257				*((buf)+fmt->Gshift/8) = g;		\
258				*((buf)+fmt->Bshift/8) = b;		\
259			} else {					\
260			        *((buf)+2-fmt->Rshift/8) = r;		\
261				*((buf)+2-fmt->Gshift/8) = g;		\
262				*((buf)+2-fmt->Bshift/8) = b;		\
263			}						\
264		}							\
265		break;							\
266									\
267		case 4: {						\
268			Uint32 Pixel;					\
269									\
270			PIXEL_FROM_RGB(Pixel, fmt, r, g, b);		\
271			*((Uint32 *)(buf)) = Pixel;			\
272		}							\
273		break;							\
274	}								\
275}
276
277/* FIXME: Should we rescale alpha into 0..255 here? */
278#define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a)				\
279{									\
280	r = SDL_expand_byte[fmt->Rloss][((Pixel&fmt->Rmask)>>fmt->Rshift)]; \
281	g = SDL_expand_byte[fmt->Gloss][((Pixel&fmt->Gmask)>>fmt->Gshift)]; \
282	b = SDL_expand_byte[fmt->Bloss][((Pixel&fmt->Bmask)>>fmt->Bshift)]; \
283	a = SDL_expand_byte[fmt->Aloss][((Pixel&fmt->Amask)>>fmt->Ashift)]; \
284}
285#define RGBA_FROM_8888(Pixel, fmt, r, g, b, a)	\
286{						\
287	r = (Pixel&fmt->Rmask)>>fmt->Rshift;	\
288	g = (Pixel&fmt->Gmask)>>fmt->Gshift;	\
289	b = (Pixel&fmt->Bmask)>>fmt->Bshift;	\
290	a = (Pixel&fmt->Amask)>>fmt->Ashift;	\
291}
292#define RGBA_FROM_RGBA8888(Pixel, r, g, b, a)				\
293{									\
294	r = (Pixel>>24);						\
295	g = ((Pixel>>16)&0xFF);						\
296	b = ((Pixel>>8)&0xFF);						\
297	a = (Pixel&0xFF);						\
298}
299#define RGBA_FROM_ARGB8888(Pixel, r, g, b, a)				\
300{									\
301	r = ((Pixel>>16)&0xFF);						\
302	g = ((Pixel>>8)&0xFF);						\
303	b = (Pixel&0xFF);						\
304	a = (Pixel>>24);						\
305}
306#define RGBA_FROM_ABGR8888(Pixel, r, g, b, a)				\
307{									\
308	r = (Pixel&0xFF);						\
309	g = ((Pixel>>8)&0xFF);						\
310	b = ((Pixel>>16)&0xFF);						\
311	a = (Pixel>>24);						\
312}
313#define RGBA_FROM_BGRA8888(Pixel, r, g, b, a)				\
314{									\
315	r = ((Pixel>>8)&0xFF);						\
316	g = ((Pixel>>16)&0xFF);						\
317	b = (Pixel>>24);						\
318	a = (Pixel&0xFF);						\
319}
320#define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a)			   \
321do {									   \
322	switch (bpp) {							   \
323		case 2:							   \
324			Pixel = *((Uint16 *)(buf));			   \
325			RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a);	   \
326		break;							   \
327									   \
328		case 3:	{						   \
329            Pixel = 0; \
330                        if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {		   \
331			        r = *((buf)+fmt->Rshift/8);		   \
332				g = *((buf)+fmt->Gshift/8);		   \
333				b = *((buf)+fmt->Bshift/8);		   \
334			} else {					   \
335			        r = *((buf)+2-fmt->Rshift/8);		   \
336				g = *((buf)+2-fmt->Gshift/8);		   \
337				b = *((buf)+2-fmt->Bshift/8);		   \
338			}						   \
339			a = 0xFF;					   \
340		}							   \
341		break;							   \
342									   \
343		case 4:							   \
344			Pixel = *((Uint32 *)(buf));			   \
345			RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a);	   \
346		break;							   \
347									   \
348		default:						   \
349                /* stop gcc complaints */		   \
350		        Pixel = 0;              \
351                r = g = b = a = 0;      \
352		break;							   \
353	}								   \
354} while (0)
355
356/* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
357#define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a)				\
358{									\
359	Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)|				\
360		((g>>fmt->Gloss)<<fmt->Gshift)|				\
361		((b>>fmt->Bloss)<<fmt->Bshift)|				\
362		((a>>fmt->Aloss)<<fmt->Ashift);				\
363}
364#define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a)			\
365{									\
366	switch (bpp) {							\
367		case 2: {						\
368			Uint16 Pixel;					\
369									\
370			PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a);	\
371			*((Uint16 *)(buf)) = Pixel;		\
372		}							\
373		break;							\
374									\
375		case 3: {						\
376                        if (SDL_BYTEORDER == SDL_LIL_ENDIAN) {		\
377			        *((buf)+fmt->Rshift/8) = r;		\
378				*((buf)+fmt->Gshift/8) = g;		\
379				*((buf)+fmt->Bshift/8) = b;		\
380			} else {					\
381			        *((buf)+2-fmt->Rshift/8) = r;		\
382				*((buf)+2-fmt->Gshift/8) = g;		\
383				*((buf)+2-fmt->Bshift/8) = b;		\
384			}						\
385		}							\
386		break;							\
387									\
388		case 4: {						\
389			Uint32 Pixel;					\
390									\
391			PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a);	\
392			*((Uint32 *)(buf)) = Pixel;			\
393		}							\
394		break;							\
395	}								\
396}
397
398/* Blend the RGB values of two Pixels based on a source alpha value */
399#define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB)	\
400do {						\
401	dR = ((((int)(sR-dR)*(int)A)/255)+dR);	\
402	dG = ((((int)(sG-dG)*(int)A)/255)+dG);	\
403	dB = ((((int)(sB-dB)*(int)A)/255)+dB);	\
404} while(0)
405
406
407/* This is a very useful loop for optimizing blitters */
408#if defined(_MSC_VER) && (_MSC_VER == 1300)
409/* There's a bug in the Visual C++ 7 optimizer when compiling this code */
410#else
411#define USE_DUFFS_LOOP
412#endif
413#ifdef USE_DUFFS_LOOP
414
415/* 8-times unrolled loop */
416#define DUFFS_LOOP8(pixel_copy_increment, width)			\
417{ int n = (width+7)/8;							\
418	switch (width & 7) {						\
419	case 0: do {	pixel_copy_increment;				\
420	case 7:		pixel_copy_increment;				\
421	case 6:		pixel_copy_increment;				\
422	case 5:		pixel_copy_increment;				\
423	case 4:		pixel_copy_increment;				\
424	case 3:		pixel_copy_increment;				\
425	case 2:		pixel_copy_increment;				\
426	case 1:		pixel_copy_increment;				\
427		} while ( --n > 0 );					\
428	}								\
429}
430
431/* 4-times unrolled loop */
432#define DUFFS_LOOP4(pixel_copy_increment, width)			\
433{ int n = (width+3)/4;							\
434	switch (width & 3) {						\
435	case 0: do {	pixel_copy_increment;				\
436	case 3:		pixel_copy_increment;				\
437	case 2:		pixel_copy_increment;				\
438	case 1:		pixel_copy_increment;				\
439		} while (--n > 0);					\
440	}								\
441}
442
443/* Use the 8-times version of the loop by default */
444#define DUFFS_LOOP(pixel_copy_increment, width)				\
445	DUFFS_LOOP8(pixel_copy_increment, width)
446
447/* Special version of Duff's device for even more optimization */
448#define DUFFS_LOOP_124(pixel_copy_increment1,				\
449                       pixel_copy_increment2,				\
450                       pixel_copy_increment4, width)			\
451{ int n = width;							\
452	if (n & 1) {							\
453		pixel_copy_increment1; n -= 1;				\
454	}								\
455	if (n & 2) {							\
456		pixel_copy_increment2; n -= 2;				\
457	}								\
458	if (n) {							\
459		n = (n+7)/ 8;						\
460		switch (n & 4) {					\
461		case 0: do {	pixel_copy_increment4;			\
462		case 4:		pixel_copy_increment4;			\
463			} while (--n > 0);				\
464		}							\
465	}								\
466}
467
468#else
469
470/* Don't use Duff's device to unroll loops */
471#define DUFFS_LOOP(pixel_copy_increment, width)				\
472{ int n;								\
473	for ( n=width; n > 0; --n ) {					\
474		pixel_copy_increment;					\
475	}								\
476}
477#define DUFFS_LOOP8(pixel_copy_increment, width)			\
478	DUFFS_LOOP(pixel_copy_increment, width)
479#define DUFFS_LOOP4(pixel_copy_increment, width)			\
480	DUFFS_LOOP(pixel_copy_increment, width)
481#define DUFFS_LOOP_124(pixel_copy_increment1,				\
482                       pixel_copy_increment2,				\
483                       pixel_copy_increment4, width)			\
484	DUFFS_LOOP(pixel_copy_increment1, width)
485
486#endif /* USE_DUFFS_LOOP */
487
488/* Prevent Visual C++ 6.0 from printing out stupid warnings */
489#if defined(_MSC_VER) && (_MSC_VER >= 600)
490#pragma warning(disable: 4550)
491#endif
492
493#endif /* _SDL_blit_h */
494
495/* vi: set ts=4 sw=4 expandtab: */