1 /* $Id: bitmap.c,v 1.7 2004-08-28 23:17:45 schaffner Exp $ */
3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
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9 FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
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11 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
12 COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
17 * Graphical routines for manipulating grs_bitmaps.
44 void gr_set_bitmap_data (grs_bitmap *bm, unsigned char *data)
47 // if (bm->bm_data!=data)
48 ogl_freebmtexture(bm);
52 Assert (bm->iMagic == BM_MAGIC_NUMBER);
53 Win32_SetTextureBits (bm, data, bm->bm_flags & BM_FLAG_RLE);
57 grs_bitmap *gr_create_bitmap(int w, int h )
59 return gr_create_bitmap_raw (w, h, d_malloc( MAX_BMP_SIZE(w, h) ));
62 grs_bitmap *gr_create_bitmap_raw(int w, int h, unsigned char * raw_data )
66 new = (grs_bitmap *)d_malloc( sizeof(grs_bitmap) );
67 gr_init_bitmap (new, 0, 0, 0, w, h, w, raw_data);
75 // Creates a bitmap of the requested size and type.
76 // w, and h are in pixels.
77 // type is a BM_... and is used to set the rowsize.
78 // if data is NULL, memory is allocated, otherwise data is used for bm_data.
80 // This function is used only by the polygon accelerator code to handle the mixture of 15bit and
83 grs_bitmap *gr_create_bitmap2(int w, int h, int type, void *data )
87 new = (grs_bitmap *)malloc( sizeof(grs_bitmap) );
96 case BM_LINEAR: new->bm_rowsize = w; break;
97 case BM_LINEAR15: new->bm_rowsize = w*PA_BPP; break;
98 default: Int3(); // unsupported type.
103 new->bm_data = malloc(new->bm_rowsize * new->bm_h);
110 void gr_init_bitmap( grs_bitmap *bm, int mode, int x, int y, int w, int h, int bytesperline, unsigned char * data ) // TODO: virtualize
113 Assert (bm->iMagic != BM_MAGIC_NUMBER || bm->pvSurface == NULL);
122 bm->bm_rowsize = bytesperline;
126 bm->iMagic = BM_MAGIC_NUMBER;
127 bm->pvSurface = NULL;
131 Win32_CreateTexture (bm);
134 bm->bm_parent=NULL;bm->gltexture=NULL;
138 gr_set_bitmap_data (bm, data);
141 gr_set_bitmap_data (bm, d_malloc( MAX_BMP_SIZE(w, h) ));
144 #ifdef BITMAP_SELECTOR
149 void gr_init_bitmap_alloc( grs_bitmap *bm, int mode, int x, int y, int w, int h, int bytesperline)
151 gr_init_bitmap(bm, mode, x, y, w, h, bytesperline, 0);
152 gr_set_bitmap_data(bm, d_malloc( MAX_BMP_SIZE(w, h) ));
155 void gr_init_bitmap_data (grs_bitmap *bm) // TODO: virtulize
159 Assert (bm->iMagic != BM_MAGIC_NUMBER);
160 bm->iMagic = BM_MAGIC_NUMBER;
161 bm->pvSurface = NULL;
164 // ogl_freebmtexture(bm);//not what we want here.
165 bm->bm_parent=NULL;bm->gltexture=NULL;
169 grs_bitmap *gr_create_sub_bitmap(grs_bitmap *bm, int x, int y, int w, int h )
173 new = (grs_bitmap *)d_malloc( sizeof(grs_bitmap) );
174 gr_init_sub_bitmap (new, bm, x, y, w, h);
179 void gr_free_bitmap(grs_bitmap *bm )
181 gr_free_bitmap_data (bm);
186 void gr_free_sub_bitmap(grs_bitmap *bm )
198 void gr_free_bitmap_data (grs_bitmap *bm) // TODO: virtulize
201 Assert (bm->iMagic == BM_MAGIC_NUMBER);
203 Win32_FreeTexture (bm);
205 if (bm->bm_data == BM_D3D_RENDER)
209 ogl_freebmtexture(bm);
211 if (bm->bm_data != NULL)
212 d_free (bm->bm_data);
216 void gr_init_sub_bitmap (grs_bitmap *bm, grs_bitmap *bmParent, int x, int y, int w, int h ) // TODO: virtualize
218 bm->bm_x = x + bmParent->bm_x;
219 bm->bm_y = y + bmParent->bm_y;
222 bm->bm_flags = bmParent->bm_flags;
223 bm->bm_type = bmParent->bm_type;
224 bm->bm_rowsize = bmParent->bm_rowsize;
227 bm->gltexture=bmParent->gltexture;
228 bm->bm_parent=bmParent;
231 Assert (bmParent->iMagic == BM_MAGIC_NUMBER);
232 bm->iMagic = BM_MAGIC_NUMBER;
233 bm->pvSurface = bmParent->pvSurface;
234 if (bm->bm_type == BM_DIRECTX)
236 bm->bm_data = bmParent->bm_data;
241 bm->bm_data = bmParent->bm_data+(unsigned int)((y*bmParent->bm_rowsize)+x);
246 void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count );
248 #if !defined(NO_ASM) && defined(__WATCOMC__)
250 #pragma aux decode_data_asm parm [esi] [ecx] [edi] [ebx] modify exact [esi edi eax ebx ecx] = \
254 "inc dword ptr [ebx+eax*4]" \
261 #elif !defined(NO_ASM) && defined(__GNUC__)
263 inline void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count ) {
265 __asm__ __volatile__ (
268 "movb (%%esi), %%al;"
269 "incl (%%ebx, %%eax, 4);"
270 "movb (%%edi, %%eax), %%al;"
271 "movb %%al, (%%esi);"
275 : "=S" (dummy[0]), "=c" (dummy[1]), "=D" (dummy[2]), "=b" (dummy[3])
276 : "0" (data), "1" (num_pixels), "2" (colormap), "3" (count)
280 #elif !defined(NO_ASM) && defined(_MSC_VER)
282 __inline void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count )
292 inc dword ptr [ebx+eax*4]
301 #else // NO_ASM or unknown compiler
303 void decode_data_asm(ubyte *data, int num_pixels, ubyte *colormap, int *count)
308 for (i = 0; i < num_pixels; i++) {
311 *data = colormap[mapped];
318 void gr_set_bitmap_flags (grs_bitmap *pbm, int flags)
321 Assert (pbm->iMagic == BM_MAGIC_NUMBER);
325 if ((flags & BM_FLAG_TRANSPARENT) != (pbm->bm_flags & BM_FLAG_TRANSPARENT))
327 Win32_SetTransparent (pbm->pvSurface, flags & BM_FLAG_TRANSPARENT);
331 pbm->bm_flags = flags;
334 void gr_set_transparent (grs_bitmap *pbm, int bTransparent)
338 gr_set_bitmap_flags (pbm, pbm->bm_flags | BM_FLAG_TRANSPARENT);
342 gr_set_bitmap_flags (pbm, pbm->bm_flags & ~BM_FLAG_TRANSPARENT);
346 void gr_set_super_transparent (grs_bitmap *pbm, int bTransparent)
350 gr_set_bitmap_flags (pbm, pbm->bm_flags & ~BM_FLAG_SUPER_TRANSPARENT);
354 gr_set_bitmap_flags (pbm, pbm->bm_flags | BM_FLAG_SUPER_TRANSPARENT);
358 void build_colormap_good( ubyte * palette, ubyte * colormap, int * freq )
362 for (i=0; i<256; i++ ) {
366 *colormap++ = gr_find_closest_color( r, g, b );
371 void gr_remap_bitmap( grs_bitmap * bmp, ubyte * palette, int transparent_color, int super_transparent_color )
376 if (bmp->bm_type != BM_LINEAR)
377 return; //can't do it
379 // This should be build_colormap_asm, but we're not using invert table, so...
380 build_colormap_good( palette, colormap, freq );
382 if ( (super_transparent_color>=0) && (super_transparent_color<=255))
383 colormap[super_transparent_color] = 254;
385 if ( (transparent_color>=0) && (transparent_color<=255))
386 colormap[transparent_color] = TRANSPARENCY_COLOR;
388 decode_data_asm(bmp->bm_data, bmp->bm_w * bmp->bm_h, colormap, freq );
390 if ( (transparent_color>=0) && (transparent_color<=255) && (freq[transparent_color]>0) )
391 gr_set_transparent (bmp, 1);
393 if ( (super_transparent_color>=0) && (super_transparent_color<=255) && (freq[super_transparent_color]>0) )
394 gr_set_super_transparent (bmp, 0);
397 void gr_remap_bitmap_good( grs_bitmap * bmp, ubyte * palette, int transparent_color, int super_transparent_color )
401 build_colormap_good( palette, colormap, freq );
403 if ( (super_transparent_color>=0) && (super_transparent_color<=255))
404 colormap[super_transparent_color] = 254;
406 if ( (transparent_color>=0) && (transparent_color<=255))
407 colormap[transparent_color] = TRANSPARENCY_COLOR;
409 if (bmp->bm_w == bmp->bm_rowsize)
410 decode_data_asm(bmp->bm_data, bmp->bm_w * bmp->bm_h, colormap, freq );
413 ubyte *p = bmp->bm_data;
414 for (y=0;y<bmp->bm_h;y++,p+=bmp->bm_rowsize)
415 decode_data_asm(p, bmp->bm_w, colormap, freq );
418 if ( (transparent_color>=0) && (transparent_color<=255) && (freq[transparent_color]>0) )
419 gr_set_transparent (bmp, 1);
421 if ( (super_transparent_color>=0) && (super_transparent_color<=255) && (freq[super_transparent_color]>0) )
422 gr_set_super_transparent (bmp, 1);
425 #ifdef BITMAP_SELECTOR
426 int gr_bitmap_assign_selector( grs_bitmap * bmp )
428 if (!dpmi_allocate_selector( bmp->bm_data, bmp->bm_w*bmp->bm_h, &bmp->bm_selector )) {
429 bmp->bm_selector = 0;
436 void gr_bitmap_check_transparency( grs_bitmap * bmp )
443 for (y=0; y<bmp->bm_h; y++ ) {
444 for (x=0; x<bmp->bm_w; x++ ) {
445 if (*data++ == TRANSPARENCY_COLOR ) {
446 gr_set_transparent (bmp, 1);
450 data += bmp->bm_rowsize - bmp->bm_w;