1 /* $Id: bitmap.c,v 1.4 2002-09-05 07:55:20 btb Exp $ */
3 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
4 SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
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6 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
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8 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
9 FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
10 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
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.
38 void gr_set_bitmap_data (grs_bitmap *bm, unsigned char *data)
41 // if (bm->bm_data!=data)
42 ogl_freebmtexture(bm);
46 Assert (bm->iMagic == BM_MAGIC_NUMBER);
47 Win32_SetTextureBits (bm, data, bm->bm_flags & BM_FLAG_RLE);
51 grs_bitmap *gr_create_bitmap(int w, int h )
53 return gr_create_bitmap_raw (w, h, d_malloc(w * h));
56 grs_bitmap *gr_create_bitmap_raw(int w, int h, unsigned char * raw_data )
60 new = (grs_bitmap *)d_malloc( sizeof(grs_bitmap) );
61 gr_init_bitmap (new, 0, 0, 0, w, h, w, raw_data);
69 // Creates a bitmap of the requested size and type.
70 // w, and h are in pixels.
71 // type is a BM_... and is used to set the rowsize.
72 // if data is NULL, memory is allocated, otherwise data is used for bm_data.
74 // This function is used only by the polygon accelerator code to handle the mixture of 15bit and
77 grs_bitmap *gr_create_bitmap2(int w, int h, int type, void *data )
81 new = (grs_bitmap *)malloc( sizeof(grs_bitmap) );
90 case BM_LINEAR: new->bm_rowsize = w; break;
91 case BM_LINEAR15: new->bm_rowsize = w*PA_BPP; break;
92 default: Int3(); // unsupported type.
97 new->bm_data = malloc(new->bm_rowsize * new->bm_h);
104 void gr_init_bitmap( grs_bitmap *bm, int mode, int x, int y, int w, int h, int bytesperline, unsigned char * data ) // TODO: virtualize
107 Assert (bm->iMagic != BM_MAGIC_NUMBER || bm->pvSurface == NULL);
116 bm->bm_rowsize = bytesperline;
120 bm->iMagic = BM_MAGIC_NUMBER;
121 bm->pvSurface = NULL;
125 Win32_CreateTexture (bm);
128 bm->bm_parent=NULL;bm->gltexture=NULL;
132 gr_set_bitmap_data (bm, data);
135 gr_set_bitmap_data (bm, d_malloc (w * h));
138 #ifdef BITMAP_SELECTOR
143 void gr_init_bitmap_alloc( grs_bitmap *bm, int mode, int x, int y, int w, int h, int bytesperline)
145 gr_init_bitmap(bm, mode, x, y, w, h, bytesperline, 0);
146 gr_set_bitmap_data(bm, d_malloc(w * h));
149 void gr_init_bitmap_data (grs_bitmap *bm) // TODO: virtulize
153 Assert (bm->iMagic != BM_MAGIC_NUMBER);
154 bm->iMagic = BM_MAGIC_NUMBER;
155 bm->pvSurface = NULL;
158 // ogl_freebmtexture(bm);//not what we want here.
159 bm->bm_parent=NULL;bm->gltexture=NULL;
163 grs_bitmap *gr_create_sub_bitmap(grs_bitmap *bm, int x, int y, int w, int h )
167 new = (grs_bitmap *)d_malloc( sizeof(grs_bitmap) );
168 gr_init_sub_bitmap (new, bm, x, y, w, h);
173 void gr_free_bitmap(grs_bitmap *bm )
175 gr_free_bitmap_data (bm);
180 void gr_free_sub_bitmap(grs_bitmap *bm )
192 void gr_free_bitmap_data (grs_bitmap *bm) // TODO: virtulize
195 Assert (bm->iMagic == BM_MAGIC_NUMBER);
197 Win32_FreeTexture (bm);
199 if (bm->bm_data == BM_D3D_RENDER)
203 ogl_freebmtexture(bm);
205 if (bm->bm_data != NULL)
206 d_free (bm->bm_data);
210 void gr_init_sub_bitmap (grs_bitmap *bm, grs_bitmap *bmParent, int x, int y, int w, int h ) // TODO: virtualize
212 bm->bm_x = x + bmParent->bm_x;
213 bm->bm_y = y + bmParent->bm_y;
216 bm->bm_flags = bmParent->bm_flags;
217 bm->bm_type = bmParent->bm_type;
218 bm->bm_rowsize = bmParent->bm_rowsize;
221 bm->gltexture=bmParent->gltexture;
222 bm->bm_parent=bmParent;
225 Assert (bmParent->iMagic == BM_MAGIC_NUMBER);
226 bm->iMagic = BM_MAGIC_NUMBER;
227 bm->pvSurface = bmParent->pvSurface;
228 if (bm->bm_type == BM_DIRECTX)
230 bm->bm_data = bmParent->bm_data;
235 bm->bm_data = bmParent->bm_data+(unsigned int)((y*bmParent->bm_rowsize)+x);
240 void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count );
242 #if !defined(NO_ASM) && defined(__WATCOMC__)
244 #pragma aux decode_data_asm parm [esi] [ecx] [edi] [ebx] modify exact [esi edi eax ebx ecx] = \
248 "inc dword ptr [ebx+eax*4]" \
255 #elif !defined(NO_ASM) && defined(__GNUC__)
257 inline void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count ) {
259 __asm__ __volatile__ (
262 "movb (%%esi), %%al;"
263 "incl (%%ebx, %%eax, 4);"
264 "movb (%%edi, %%eax), %%al;"
265 "movb %%al, (%%esi);"
269 : "=S" (dummy[0]), "=c" (dummy[1]), "=D" (dummy[2]), "=b" (dummy[3])
270 : "0" (data), "1" (num_pixels), "2" (colormap), "3" (count)
274 #elif !defined(NO_ASM) && defined(_MSC_VER)
276 __inline void decode_data_asm(ubyte *data, int num_pixels, ubyte * colormap, int * count )
286 inc dword ptr [ebx+eax*4]
295 #else // NO_ASM or unknown compiler
297 void decode_data_asm(ubyte *data, int num_pixels, ubyte *colormap, int *count)
302 for (i = 0; i < num_pixels; i++) {
305 *data = colormap[mapped];
312 void gr_set_bitmap_flags (grs_bitmap *pbm, int flags)
315 Assert (pbm->iMagic == BM_MAGIC_NUMBER);
319 if ((flags & BM_FLAG_TRANSPARENT) != (pbm->bm_flags & BM_FLAG_TRANSPARENT))
321 Win32_SetTransparent (pbm->pvSurface, flags & BM_FLAG_TRANSPARENT);
325 pbm->bm_flags = flags;
328 void gr_set_transparent (grs_bitmap *pbm, int bTransparent)
332 gr_set_bitmap_flags (pbm, pbm->bm_flags | BM_FLAG_TRANSPARENT);
336 gr_set_bitmap_flags (pbm, pbm->bm_flags & ~BM_FLAG_TRANSPARENT);
340 void gr_set_super_transparent (grs_bitmap *pbm, int bTransparent)
344 gr_set_bitmap_flags (pbm, pbm->bm_flags & ~BM_FLAG_SUPER_TRANSPARENT);
348 gr_set_bitmap_flags (pbm, pbm->bm_flags | BM_FLAG_SUPER_TRANSPARENT);
352 void build_colormap_good( ubyte * palette, ubyte * colormap, int * freq )
356 for (i=0; i<256; i++ ) {
360 *colormap++ = gr_find_closest_color( r, g, b );
365 void gr_remap_bitmap( grs_bitmap * bmp, ubyte * palette, int transparent_color, int super_transparent_color )
370 if (bmp->bm_type != BM_LINEAR)
371 return; //can't do it
373 // This should be build_colormap_asm, but we're not using invert table, so...
374 build_colormap_good( palette, colormap, freq );
376 if ( (super_transparent_color>=0) && (super_transparent_color<=255))
377 colormap[super_transparent_color] = 254;
379 if ( (transparent_color>=0) && (transparent_color<=255))
380 colormap[transparent_color] = TRANSPARENCY_COLOR;
382 decode_data_asm(bmp->bm_data, bmp->bm_w * bmp->bm_h, colormap, freq );
384 if ( (transparent_color>=0) && (transparent_color<=255) && (freq[transparent_color]>0) )
385 gr_set_transparent (bmp, 1);
387 if ( (super_transparent_color>=0) && (super_transparent_color<=255) && (freq[super_transparent_color]>0) )
388 gr_set_super_transparent (bmp, 0);
391 void gr_remap_bitmap_good( grs_bitmap * bmp, ubyte * palette, int transparent_color, int super_transparent_color )
395 build_colormap_good( palette, colormap, freq );
397 if ( (super_transparent_color>=0) && (super_transparent_color<=255))
398 colormap[super_transparent_color] = 254;
400 if ( (transparent_color>=0) && (transparent_color<=255))
401 colormap[transparent_color] = TRANSPARENCY_COLOR;
403 if (bmp->bm_w == bmp->bm_rowsize)
404 decode_data_asm(bmp->bm_data, bmp->bm_w * bmp->bm_h, colormap, freq );
407 ubyte *p = bmp->bm_data;
408 for (y=0;y<bmp->bm_h;y++,p+=bmp->bm_rowsize)
409 decode_data_asm(p, bmp->bm_w, colormap, freq );
412 if ( (transparent_color>=0) && (transparent_color<=255) && (freq[transparent_color]>0) )
413 gr_set_transparent (bmp, 1);
415 if ( (super_transparent_color>=0) && (super_transparent_color<=255) && (freq[super_transparent_color]>0) )
416 gr_set_super_transparent (bmp, 1);
419 #ifdef BITMAP_SELECTOR
420 int gr_bitmap_assign_selector( grs_bitmap * bmp )
422 if (!dpmi_allocate_selector( bmp->bm_data, bmp->bm_w*bmp->bm_h, &bmp->bm_selector )) {
423 bmp->bm_selector = 0;
430 void gr_bitmap_check_transparency( grs_bitmap * bmp )
437 for (y=0; y<bmp->bm_h; y++ ) {
438 for (x=0; x<bmp->bm_w; x++ ) {
439 if (*data++ == TRANSPARENCY_COLOR ) {
440 gr_set_transparent (bmp, 1);
444 data += bmp->bm_rowsize - bmp->bm_w;