2 ** Easylogo TGA->header converter
3 ** ==============================
4 ** (C) 2000 by Paolo Scaffardi (arsenio@tin.it)
5 ** AIRVENT SAM s.p.a - RIMINI(ITALY)
7 ** This is still under construction!
16 /*#define ENABLE_ASCII_BANNERS */
20 unsigned char ColorMapType;
21 unsigned char ImageTypeCode;
22 unsigned short ColorMapOrigin;
23 unsigned short ColorMapLenght;
24 unsigned char ColorMapEntrySize;
25 unsigned short ImageXOrigin;
26 unsigned short ImageYOrigin;
27 unsigned short ImageWidth;
28 unsigned short ImageHeight;
29 unsigned char ImagePixelSize;
30 unsigned char ImageDescriptorByte;
42 unsigned char Cb,y1,Cr,y2;
58 void StringUpperCase (char *str)
60 int count = strlen(str);
66 if ((c >= 'a')&&(c<='z'))
72 void StringLowerCase (char *str)
74 int count = strlen(str);
80 if ((c >= 'A')&&(c<='Z'))
85 void pixel_rgb_to_yuyv (rgb_t *rgb_pixel, yuyv_t *yuyv_pixel)
87 unsigned int pR, pG, pB ;
89 /* Transform (0-255) components to (0-100) */
90 pR = rgb_pixel->r * 100 / 255 ;
91 pG = rgb_pixel->g * 100 / 255 ;
92 pB = rgb_pixel->b * 100 / 255 ;
94 /* Calculate YUV values (0-255) from RGB beetween 0-100 */
95 yuyv_pixel->y1 = yuyv_pixel->y2 = 209 * (pR + pG + pB) / 300 + 16 ;
96 yuyv_pixel->Cb = pB - (pR/4) - (pG*3/4) + 128 ;
97 yuyv_pixel->Cr = pR - (pG*3/4) - (pB/4) + 128 ;
102 void printlogo_rgb (rgb_t *data, int w, int h)
107 for (x=0; x<w; x++, data++)
108 if ((data->r < 30)/*&&(data->g == 0)&&(data->b == 0)*/)
116 void printlogo_yuyv (unsigned short *data, int w, int h)
121 for (x=0; x<w; x++, data++)
122 if (*data == 0x1080) /* Because of inverted on i386! */
130 static inline unsigned short le16_to_cpu (unsigned short val)
133 unsigned char pval[2];
137 return (swapped.pval[1] << 8) + swapped.pval[0];
140 int image_load_tga (image_t *image, char *filename)
143 tga_header_t header ;
148 if( ( file = fopen( filename, "rb" ) ) == NULL )
151 fread(&header, sizeof(header), 1, file);
153 /* byte swap: tga is little endian, host is ??? */
154 header.ColorMapOrigin = le16_to_cpu (header.ColorMapOrigin);
155 header.ColorMapLenght = le16_to_cpu (header.ColorMapLenght);
156 header.ImageXOrigin = le16_to_cpu (header.ImageXOrigin);
157 header.ImageYOrigin = le16_to_cpu (header.ImageYOrigin);
158 header.ImageWidth = le16_to_cpu (header.ImageWidth);
159 header.ImageHeight = le16_to_cpu (header.ImageHeight);
161 image->width = header.ImageWidth ;
162 image->height = header.ImageHeight ;
164 switch (header.ImageTypeCode){
165 case 2: /* Uncompressed RGB */
167 image->palette_size = 0 ;
168 image->palette = NULL ;
172 printf("Format not supported!\n");
176 image->bpp = header.ImagePixelSize ;
177 image->pixel_size = ((image->bpp-1) / 8) + 1 ;
178 image->pixels = image->width * image->height;
179 image->size = image->pixels * image->pixel_size ;
180 image->data = malloc(image->size) ;
182 if (image->bpp != 24)
184 printf("Bpp not supported: %d!\n", image->bpp);
188 fread(image->data, image->size, 1, file);
190 /* Swapping R and B values */
193 for(i=0; i < image->pixels; i++, p++)
202 if(!(header.ImageDescriptorByte & 0x20))
204 unsigned char *temp = malloc(image->size);
205 int linesize = image->pixel_size * image->width ;
206 void *dest = image->data,
207 *source = temp + image->size - linesize ;
212 printf("Cannot alloc temp buffer!\n");
216 memcpy(temp, image->data, image->size);
217 for(i = 0; i<image->height; i++, dest+=linesize, source-=linesize)
218 memcpy(dest, source, linesize);
223 #ifdef ENABLE_ASCII_BANNERS
224 printlogo_rgb (image->data,image->width, image->height);
231 int image_free (image_t *image)
233 if(image->data != NULL)
236 if(image->palette != NULL)
237 free(image->palette);
242 int image_rgb_to_yuyv (image_t *rgb_image, image_t *yuyv_image)
244 rgb_t *rgb_ptr = (rgb_t *) rgb_image->data ;
246 unsigned short *dest ;
249 yuyv_image->pixel_size = 2 ;
250 yuyv_image->bpp = 16 ;
251 yuyv_image->yuyv = 1 ;
252 yuyv_image->width = rgb_image->width ;
253 yuyv_image->height = rgb_image->height ;
254 yuyv_image->pixels = yuyv_image->width * yuyv_image->height ;
255 yuyv_image->size = yuyv_image->pixels * yuyv_image->pixel_size ;
256 dest = (unsigned short *) (yuyv_image->data = malloc(yuyv_image->size)) ;
257 yuyv_image->palette = 0 ;
258 yuyv_image->palette_size= 0 ;
260 while((count++) < rgb_image->pixels)
262 pixel_rgb_to_yuyv (rgb_ptr++, &yuyv);
264 if ((count & 1)==0) /* Was == 0 */
265 memcpy (dest, ((void *)&yuyv) + 2, sizeof(short));
267 memcpy (dest, (void *)&yuyv, sizeof(short));
272 #ifdef ENABLE_ASCII_BANNERS
273 printlogo_yuyv (yuyv_image->data, yuyv_image->width, yuyv_image->height);
278 int image_save_header (image_t *image, char *filename, char *varname)
280 FILE *file = fopen (filename, "w");
281 char app[256], str[256]="", def_name[64] ;
282 int count = image->size, col=0;
283 unsigned char *dataptr = image->data ;
287 /* Author information */
288 fprintf(file, "/*\n * Generated by EasyLogo, (C) 2000 by Paolo Scaffardi\n *\n");
289 fprintf(file, " * To use this, include it and call: easylogo_plot(screen,&%s, width,x,y)\n *\n", varname);
290 fprintf(file, " * Where:\t'screen'\tis the pointer to the frame buffer\n");
291 fprintf(file, " *\t\t'width'\tis the screen width\n");
292 fprintf(file, " *\t\t'x'\t\tis the horizontal position\n");
293 fprintf(file, " *\t\t'y'\t\tis the vertical position\n */\n\n");
296 fprintf(file, "#include <video_easylogo.h>\n\n");
298 strcpy(def_name, varname);
299 StringUpperCase (def_name);
300 fprintf(file, "#define DEF_%s_WIDTH\t\t%d\n", def_name, image->width);
301 fprintf(file, "#define DEF_%s_HEIGHT\t\t%d\n", def_name, image->height);
302 fprintf(file, "#define DEF_%s_PIXELS\t\t%d\n", def_name, image->pixels);
303 fprintf(file, "#define DEF_%s_BPP\t\t%d\n", def_name, image->bpp);
304 fprintf(file, "#define DEF_%s_PIXEL_SIZE\t%d\n", def_name, image->pixel_size);
305 fprintf(file, "#define DEF_%s_SIZE\t\t%d\n\n", def_name, image->size);
307 fprintf(file, "unsigned char DEF_%s_DATA[DEF_%s_SIZE] = {\n", def_name, def_name);
313 sprintf(str, " 0x%02x", *dataptr++);
319 fprintf(file, "%s", str);
329 sprintf(str, "%s, 0x%02x", app, *dataptr++);
336 fprintf(file, "%s\n", str);
338 /* End of declaration */
339 fprintf(file, "};\n\n");
341 fprintf(file, "fastimage_t %s = {\n", varname);
342 fprintf(file, " DEF_%s_DATA,\n", def_name);
343 fprintf(file, " DEF_%s_WIDTH,\n", def_name);
344 fprintf(file, " DEF_%s_HEIGHT,\n", def_name);
345 fprintf(file, " DEF_%s_BPP,\n", def_name);
346 fprintf(file, " DEF_%s_PIXEL_SIZE,\n", def_name);
347 fprintf(file, " DEF_%s_SIZE\n};\n", def_name);
354 #define DEF_FILELEN 256
356 int main (int argc, char *argv[])
359 inputfile[DEF_FILELEN],
360 outputfile[DEF_FILELEN],
361 varname[DEF_FILELEN];
363 image_t rgb_logo, yuyv_logo ;
369 strcpy (inputfile, argv[1]);
372 strcpy (varname, argv[2]);
375 char *dot = strchr(inputfile, '.');
376 int pos = dot - inputfile;
380 strncpy (varname, inputfile, pos);
386 strcpy (outputfile, argv[3]);
389 char *dot = strchr (varname, '.');
390 int pos = dot - varname;
394 char app[DEF_FILELEN] ;
396 strncpy(app, varname, pos);
398 sprintf(outputfile, "%s.h", app);
404 printf("EasyLogo 1.0 (C) 2000 by Paolo Scaffardi\n\n");
406 printf("Syntax: easylogo inputfile [outputvar {outputfile}] \n");
408 printf("Where: 'inputfile' is the TGA image to load\n");
409 printf(" 'outputvar' is the variable name to create\n");
410 printf(" 'outputfile' is the output header file (default is 'inputfile.h')\n");
415 printf("Doing '%s' (%s) from '%s'...",
416 outputfile, varname, inputfile);
418 /* Import TGA logo */
421 if (image_load_tga (&rgb_logo, inputfile)<0)
423 printf("input file not found!\n");
427 /* Convert it to YUYV format */
430 image_rgb_to_yuyv (&rgb_logo, &yuyv_logo) ;
432 /* Save it into a header format */
435 image_save_header (&yuyv_logo, outputfile, varname) ;
437 /* Free original image and copy */
439 image_free (&rgb_logo);
440 image_free (&yuyv_logo);