3 Bitmap functions (needs libjpeg)
5 Extension module for the rfxswf library.
6 Part of the swftools package.
8 Copyright (c) 2000, 2001 Rainer Böhme <rfxswf@reflex-studio.de>
10 This file is distributed under the GPL, see file COPYING for details
14 #define OUTBUFFER_SIZE 0x8000
18 typedef struct _JPEGDESTMGR
19 { struct jpeg_destination_mgr mgr;
22 struct jpeg_compress_struct cinfo;
23 struct jpeg_error_mgr jerr;
24 } JPEGDESTMGR, * LPJPEGDESTMGR;
26 // Destination manager callbacks
28 void RFXSWF_init_destination(j_compress_ptr cinfo)
29 { JPEGDESTMGR * dmgr = (JPEGDESTMGR *)cinfo->dest;
30 dmgr->buffer = (JOCTET*)malloc(OUTBUFFER_SIZE);
31 dmgr->mgr.next_output_byte = dmgr->buffer;
32 dmgr->mgr.free_in_buffer = OUTBUFFER_SIZE;
35 boolean RFXSWF_empty_output_buffer(j_compress_ptr cinfo)
36 { JPEGDESTMGR * dmgr = (JPEGDESTMGR *)cinfo->dest;
37 swf_SetBlock(dmgr->t,(U8*)dmgr->buffer,OUTBUFFER_SIZE);
38 dmgr->mgr.next_output_byte = dmgr->buffer;
39 dmgr->mgr.free_in_buffer = OUTBUFFER_SIZE;
43 void RFXSWF_term_destination(j_compress_ptr cinfo)
44 { JPEGDESTMGR * dmgr = (JPEGDESTMGR *)cinfo->dest;
45 swf_SetBlock(dmgr->t,(U8*)dmgr->buffer,OUTBUFFER_SIZE-dmgr->mgr.free_in_buffer);
47 dmgr->mgr.free_in_buffer = 0;
50 JPEGBITS * swf_SetJPEGBitsStart(TAG * t,int width,int height,int quality)
54 // redirect compression lib output to local SWF Tag structure
56 jpeg = (JPEGDESTMGR *)malloc(sizeof(JPEGDESTMGR));
57 if (!jpeg) return NULL;
59 memset(jpeg,0x00,sizeof(JPEGDESTMGR));
60 jpeg->cinfo.err = jpeg_std_error(&jpeg->jerr);
62 jpeg_create_compress(&jpeg->cinfo);
64 jpeg->mgr.init_destination = RFXSWF_init_destination;
65 jpeg->mgr.empty_output_buffer = RFXSWF_empty_output_buffer;
66 jpeg->mgr.term_destination = RFXSWF_term_destination;
70 jpeg->cinfo.dest = (struct jpeg_destination_mgr *)jpeg;
74 jpeg->cinfo.image_width = width;
75 jpeg->cinfo.image_height = height;
76 jpeg->cinfo.input_components = 3;
77 jpeg->cinfo.in_color_space = JCS_RGB;
79 jpeg_set_defaults(&jpeg->cinfo);
80 jpeg_set_quality(&jpeg->cinfo,quality,TRUE);
82 // write tables to SWF
84 jpeg_write_tables(&jpeg->cinfo);
86 // compess image to SWF
88 jpeg_suppress_tables(&jpeg->cinfo, TRUE);
89 jpeg_start_compress(&jpeg->cinfo, FALSE);
91 return (JPEGBITS *)jpeg;
94 int swf_SetJPEGBitsLines(JPEGBITS * jpegbits,U8 ** data,int n)
95 { JPEGDESTMGR * jpeg = (JPEGDESTMGR *)jpegbits;
97 jpeg_write_scanlines(&jpeg->cinfo,data,n);
101 int swf_SetJPEGBitsLine(JPEGBITS * jpegbits,U8 * data)
102 { return swf_SetJPEGBitsLines(jpegbits,&data,1);
105 int swf_SetJPEGBitsFinish(JPEGBITS * jpegbits)
106 { JPEGDESTMGR * jpeg = (JPEGDESTMGR *)jpegbits;
107 if (!jpeg) return -1;
108 jpeg_finish_compress(&jpeg->cinfo);
113 void swf_SetJPEGBits2(TAG * tag,U16 width,U16 height,RGBA* bitmap, int quality)
117 jpeg = swf_SetJPEGBitsStart(tag,width,height,quality);
118 for (y=0;y<height;y++)
119 { U8 scanline[3*width];
121 for (x=0;x<width;x++)
122 { scanline[p++] = bitmap[width*y+x].r;
123 scanline[p++] = bitmap[width*y+x].g;
124 scanline[p++] = bitmap[width*y+x].b;
126 swf_SetJPEGBitsLine(jpeg,scanline);
128 swf_SetJPEGBitsFinish(jpeg);
131 int swf_SetJPEGBits(TAG * t,char * fname,int quality)
132 { struct jpeg_decompress_struct cinfo;
133 struct jpeg_error_mgr jerr;
138 cinfo.err = jpeg_std_error(&jerr);
139 jpeg_create_decompress(&cinfo);
141 if ((f=fopen(fname,"rb"))==NULL) {
142 fprintf(stderr, "rfxswf: file open error\n");
146 jpeg_stdio_src(&cinfo,f);
147 jpeg_read_header(&cinfo, TRUE);
148 jpeg_start_decompress(&cinfo);
150 out = swf_SetJPEGBitsStart(t,cinfo.output_width,cinfo.output_height,quality);
151 scanline = (U8*)malloc(4*cinfo.output_width);
156 if(cinfo.out_color_space == JCS_GRAYSCALE) {
157 for (y=0;y<cinfo.output_height;y++)
159 jpeg_read_scanlines(&cinfo,&js,1);
160 for(x=cinfo.output_width-1;x>=0;x--) {
161 js[x*3] = js[x*3+1] = js[x*3+2] = js[x];
163 swf_SetJPEGBitsLines(out,(U8**)&js,1);
166 else if(cinfo.out_color_space == JCS_RGB)
168 for (y=0;y<cinfo.output_height;y++)
169 { jpeg_read_scanlines(&cinfo,&js,1);
170 swf_SetJPEGBitsLines(out,(U8**)&js,1);
173 else if(cinfo.out_color_space == JCS_YCCK)
176 fprintf(stderr, "Error: Can't convert YCCK to RGB.\n");
179 else if(cinfo.out_color_space == JCS_YCbCr)
181 for (y=0;y<cinfo.output_height;y++) {
183 for(x=0;x<cinfo.output_width;x++) {
188 js[x*3+0] = y + ((360*(v-128))>>8);
189 js[x*3+1] = y - ((88*(u-128)-183*(v-128))>>8);
190 js[x*3+2] = y + ((455 * (u-128))>>8);
194 else if(cinfo.out_color_space == JCS_CMYK)
196 for (y=0;y<cinfo.output_height;y++)
198 jpeg_read_scanlines(&cinfo,&js,1);
199 /* This routine seems to work for now-
200 It's a mixture of 3 different
201 CMYK->RGB conversion routines I found in the
202 web. (which all produced garbage)
203 I'm happily accepting suggestions. (mk)*/
204 for(x=0;x<cinfo.output_width;x++) {
205 int white = 255 - js[x*4+3];
206 js[x*3+0] = white - ((js[x*4]*white)>>8);
207 js[x*3+1] = white - ((js[x*4+1]*white)>>8);
208 js[x*3+2] = white - ((js[x*4+2]*white)>>8);
210 swf_SetJPEGBitsLines(out,(U8**)&js,1);
215 swf_SetJPEGBitsFinish(out);
216 jpeg_finish_decompress(&cinfo);
222 #endif // HAVE_JPEGLIB
224 // Lossless compression texture based on zlib
228 int RFXSWF_deflate_wraper(TAG * t,z_stream * zs,U8 * data,boolean finish)
230 { int status = deflate(zs,Z_SYNC_FLUSH);
232 if (zs->avail_out == 0)
233 { swf_SetBlock(t,data,zs->next_out-data);
235 zs->avail_out = OUTBUFFER_SIZE;
239 { if (finish) deflate(zs,Z_FINISH);
246 fprintf(stderr,"rfxswf: zlib compression error (%i)\n",status);
255 int swf_SetLosslessBits(TAG * t,U16 width,U16 height,void * bitmap,U8 bitmap_flags)
260 switch (bitmap_flags)
262 return swf_SetLosslessBitsIndexed(t,width,height,bitmap,NULL,256);
264 bps = BYTES_PER_SCANLINE(sizeof(U16)*width);
270 fprintf(stderr, "rfxswf: unknown bitmap type %d\n", bitmap_flags);
274 swf_SetU8(t,bitmap_flags);
276 swf_SetU16(t,height);
278 if ((data=malloc(OUTBUFFER_SIZE)))
281 memset(&zs,0x00,sizeof(z_stream));
285 if (deflateInit(&zs,Z_DEFAULT_COMPRESSION)==Z_OK)
286 { zs.avail_in = bps*height;
289 zs.avail_out = OUTBUFFER_SIZE;
291 if (RFXSWF_deflate_wraper(t,&zs,data,TRUE)<0) res = -3;
292 if (zs.next_out>data) swf_SetBlock(t,data,zs.next_out-data);
296 } else res = -3; // zlib error
298 } else res = -2; // memory error
303 int swf_SetLosslessBitsIndexed(TAG * t,U16 width,U16 height,U8 * bitmap,RGBA * palette,U16 ncolors)
304 { RGBA * pal = palette;
305 int bps = BYTES_PER_SCANLINE(width);
309 if (!pal) // create default palette for grayscale images
311 pal = malloc(256*sizeof(RGBA));
312 for (i=0;i<256;i++) { pal[i].r = pal[i].g = pal[i].b = i; pal[i].a = 0xff;}
316 if ((ncolors<2)||(ncolors>256)||(!t)) {
317 fprintf(stderr, "rfxswf: unsupported number of colors: %d\n", ncolors);
318 return -1; // parameter error
321 swf_SetU8(t,BMF_8BIT);
323 swf_SetU16(t,height);
324 swf_SetU8(t,ncolors-1); // number of pal entries
326 if ((data=malloc(OUTBUFFER_SIZE)))
329 memset(&zs,0x00,sizeof(z_stream));
333 if (deflateInit(&zs,Z_DEFAULT_COMPRESSION)==Z_OK)
334 { U8 * zpal; // compress palette
335 if ((zpal = malloc(ncolors*4)))
339 /* be careful with ST_DEFINEBITSLOSSLESS2, because
340 the Flash player produces great bugs if you use too many
341 alpha colors in your palette. The only sensible result that
342 can be archeived is setting one color to r=0,b=0,g=0,a=0 to
343 make transparent parts in sprites. That's the cause why alpha
344 handling is implemented in lossless routines of rfxswf.
346 Indeed: I haven't understood yet how flash player handles
347 alpha values different from 0 and 0xff in lossless bitmaps...
350 if (swf_GetTagID(t)==ST_DEFINEBITSLOSSLESS2) // have alpha channel?
351 { for (i=0;i<ncolors;i++)
358 zs.avail_in = 4*ncolors;
361 { for (i=0;i<ncolors;i++) // pack RGBA structures to RGB
367 zs.avail_in = 3*ncolors;
372 zs.avail_out = OUTBUFFER_SIZE;
374 if (RFXSWF_deflate_wraper(t,&zs,data,FALSE)<0) res = -3;
378 zs.avail_in = (bps*height*sizeof(U8));
380 if (RFXSWF_deflate_wraper(t,&zs,data,TRUE)<0) res = -3;
384 if (zs.next_out>data) swf_SetBlock(t,data,zs.next_out-data);
387 } else res = -2; // memory error
388 } else res = -3; // zlib error
392 if (!palette) free(pal);
397 int swf_SetLosslessBitsGrayscale(TAG * t,U16 width,U16 height,U8 * bitmap)
398 { return swf_SetLosslessBitsIndexed(t,width,height,bitmap,NULL,256);
404 #if defined(HAVE_ZLIB) && defined(HAVE_JPEGLIB)
405 int swf_SetJPEGBits3(TAG * tag,U16 width,U16 height,RGBA* bitmap, int quality)
415 swf_SetU32(tag, 0); //placeholder
416 jpeg = swf_SetJPEGBitsStart(tag,width,height,quality);
417 for (y=0;y<height;y++)
418 { U8 scanline[3*width];
420 for (x=0;x<width;x++)
421 { scanline[p++] = bitmap[width*y+x].r;
422 scanline[p++] = bitmap[width*y+x].g;
423 scanline[p++] = bitmap[width*y+x].b;
425 swf_SetJPEGBitsLine(jpeg,scanline);
427 swf_SetJPEGBitsFinish(jpeg);
428 PUT32(&tag->data[pos], tag->len - pos - 4);
430 data=malloc(OUTBUFFER_SIZE);
431 memset(&zs,0x00,sizeof(z_stream));
433 if (deflateInit(&zs,Z_DEFAULT_COMPRESSION)!=Z_OK) {
434 fprintf(stderr, "rfxswf: zlib compression failed");
439 zs.avail_out = OUTBUFFER_SIZE;
441 for (y=0;y<height;y++)
442 { U8 scanline[width];
444 for (x=0;x<width;x++) {
445 scanline[p++] = bitmap[width*y+x].a;
448 zs.next_in = scanline;
451 if(deflate(&zs, Z_NO_FLUSH) != Z_OK) {
452 fprintf(stderr, "rfxswf: zlib compression failed");
455 if(zs.next_out != data) {
456 swf_SetBlock(tag, data, zs.next_out - data);
458 zs.avail_out = OUTBUFFER_SIZE;
467 int ret = deflate(&zs, Z_FINISH);
469 ret != Z_STREAM_END) {
470 fprintf(stderr, "rfxswf: zlib compression failed");
473 if(zs.next_out != data) {
474 swf_SetBlock(tag, data, zs.next_out - data);
476 zs.avail_out = OUTBUFFER_SIZE;
478 if (ret == Z_STREAM_END) {
489 #undef OUTBUFFER_SIZE