2 +----------------------------------------------------------------------+
3 | Author: yoya@awm.jp |
4 +----------------------------------------------------------------------+
9 #include "swf_define.h"
14 #include "bitstream.h"
15 #include "swf_rgb.h" // Lossless format=3
16 #include "swf_rgba.h" // Lossless2 format=3
17 #include "swf_xrgb.h" // Lossless format=5
18 #include "swf_argb.h" // Lossless2 format=5
21 typedef struct my_png_buffer_ {
23 unsigned long data_len;
24 unsigned long data_offset;
32 png_data_read_func(png_structp png_ptr, png_bytep buf, png_size_t size) {
33 my_png_buffer *png_buff = (my_png_buffer *)png_get_io_ptr(png_ptr);
34 if (png_buff->data_offset + size <= png_buff->data_len) {
35 memcpy(buf, png_buff->data + png_buff->data_offset, size);
36 png_buff->data_offset += size;
38 fprintf(stderr, "png_data_read_func: ! png_buff->data_offset(%lu) + size(%zd) <= png_buff->data_len(%lu)\n",
39 png_buff->data_offset, size, png_buff->data_len);
40 png_error(png_ptr,"png_read_read_func failed");
44 static void png_data_read(png_structp png_ptr, my_png_buffer *png_buff) {
45 png_set_read_fn(png_ptr, (png_voidp) png_buff,
46 (png_rw_ptr)png_data_read_func);
54 png_data_write_func(png_structp png_ptr, png_bytep buf, png_size_t size) {
55 my_png_buffer *png_buff = (my_png_buffer *)png_get_io_ptr(png_ptr);
56 unsigned long new_data_len;
58 if (png_buff->data_offset + size > png_buff->data_len) {
59 new_data_len = 2 * png_buff->data_len;
60 if (png_buff->data_offset + size > new_data_len) {
61 new_data_len = png_buff->data_offset + size;
63 tmp = realloc(png_buff->data, new_data_len);
65 fprintf(stderr, "png_data_write_func: can't realloc: new_data_len(%lu), data_len(%lu)\n",
66 new_data_len, png_buff->data_len);
67 png_error(png_ptr,"png_data_write_func failed");
70 png_buff->data_len = new_data_len;
72 memcpy(png_buff->data + png_buff->data_offset, buf, size);
73 png_buff->data_offset += size;
77 png_data_write(png_structp png_ptr, my_png_buffer *png_buff) {
78 png_set_write_fn(png_ptr, (png_voidp) png_buff,
79 (png_rw_ptr)png_data_write_func, NULL);
87 pngconv_png2lossless(unsigned char *png_data, unsigned long png_data_len,
88 int *tag_no, int *format,
89 unsigned short *width, unsigned short *height,
90 void **colormap, int *colormap_count) {
91 volatile png_structp png_ptr = NULL;
92 volatile png_infop png_info_ptr = NULL;
93 my_png_buffer png_buff;
96 png_uint_32 png_width = 0, png_height = 0;
97 volatile png_bytepp png_image_data = NULL;
99 void *image_data = NULL;
100 png_color *palette = NULL;
102 png_bytep trans = NULL;
104 png_color_16p trans_values = NULL;
106 if (png_data == NULL) {
107 fprintf(stderr, "pngconv_png2lossless: png_data == NULL\n");
110 is_png = png_check_sig((png_bytep)png_data, 8);
112 fprintf(stderr, "pngconv_png2lossless: is not PNG!\n");
115 png_ptr = png_create_read_struct
116 (PNG_LIBPNG_VER_STRING, NULL,NULL,NULL);
118 fprintf(stderr, "pngconv_png2lossless: can't create read_struct\n");
121 if (setjmp(png_jmpbuf(png_ptr))) {
122 fprintf(stderr, "pngconv_png2lossless: libpng error jump occured\n");
123 png_destroy_read_struct((png_structpp) &png_ptr,
124 (png_infopp) &png_info_ptr, NULL);
125 if (png_image_data) {
126 for (y=0 ; y < png_height ; y++) {
127 free(png_image_data[y]);
129 free(png_image_data);
133 png_info_ptr = png_create_info_struct(png_ptr);
134 if (! png_info_ptr) {
135 fprintf(stderr, "pngconv_png2lossless: can't create info_struct\n");
136 png_destroy_read_struct ((png_structpp)&png_ptr, NULL, NULL);
139 png_buff.data = png_data;
140 png_buff.data_len = png_data_len;
141 png_buff.data_offset = 0;
143 png_data_read(png_ptr, &png_buff);
144 png_read_info(png_ptr, png_info_ptr);
145 png_get_IHDR(png_ptr, png_info_ptr,
146 &png_width, &png_height, &bpp, &color_type,
148 *width = (unsigned short) png_width;
149 *height = (unsigned short) png_height;
151 case PNG_COLOR_TYPE_PALETTE:
153 png_get_PLTE(png_ptr, png_info_ptr, &palette, &palette_num);
154 if (png_get_tRNS(png_ptr, png_info_ptr, &trans, &num_trans,
155 &trans_values) && (num_trans > 0)) {
156 *tag_no = 36; // DefineBitsLossless2
158 *tag_no = 20; // DefineBitsLossless
161 case PNG_COLOR_TYPE_RGB:
163 *tag_no = 20; /* DefineBitsLossless */
165 case PNG_COLOR_TYPE_RGB_ALPHA:
167 *tag_no = 36; /* DefineBitsLossless2 */
168 if (png_get_valid(png_ptr, png_info_ptr, PNG_INFO_tRNS))
169 png_set_tRNS_to_alpha(png_ptr);
172 fprintf(stderr, "pngconv_png2lossless: color_type=%d not implemented yet.\n", color_type);
173 png_destroy_read_struct((png_structpp)&png_ptr,
174 (png_infopp)&png_info_ptr, NULL);
178 fprintf(stderr, "pngconv_png2lossless: bpp=%d not implemented yet. accept only bpp <= 8\n", bpp);
179 png_destroy_read_struct((png_structpp)&png_ptr,
180 (png_infopp)&png_info_ptr, NULL);
184 png_image_data = (png_bytepp) malloc(png_height * sizeof(png_bytep));
185 for (y=0 ; y < png_height ; y++) {
186 png_image_data[y] = (png_bytep) malloc(png_get_rowbytes(png_ptr, png_info_ptr));
188 png_read_image(png_ptr, png_image_data);
192 if (color_type == PNG_COLOR_TYPE_PALETTE) {
194 *colormap_count = palette_num;
195 if (num_trans == 0) {
196 swf_rgb_t *result_colormap = malloc(sizeof(swf_rgb_t) * palette_num); // Lossless
197 for (i=0 ; i < palette_num ; i++) {
198 result_colormap[i].red = palette[i].red;
199 result_colormap[i].green = palette[i].green;
200 result_colormap[i].blue = palette[i].blue;
202 *colormap = result_colormap;
204 swf_rgba_t *result_colormap = malloc(sizeof(swf_rgba_t) * palette_num); // Lossless2
205 for (i=0 ; i < palette_num ; i++) {
207 int alpha_value = trans[i];
208 result_colormap[i].red = palette[i].red * alpha_value / 0xff;
209 result_colormap[i].green = palette[i].green * alpha_value / 0xff;
210 result_colormap[i].blue = palette[i].blue * alpha_value / 0xff;
211 result_colormap[i].alpha = alpha_value;
213 result_colormap[i].red = palette[i].red;
214 result_colormap[i].green = palette[i].green;
215 result_colormap[i].blue = palette[i].blue;
216 result_colormap[i].alpha = 0xff; // opaque
219 *colormap = result_colormap;
221 unsigned char *indices_data = malloc(((png_width+ 3) & -4) * png_height);
223 for (y=0 ; y < png_height ; y++) {
224 bitstream_t *bs = bitstream_open();
231 bitstream_input(bs, png_image_data[y], png_width);
232 for (x=0 ; x < png_width ; x++) {
233 indices_data[i] = bitstream_getbits(bs, bpp);
236 while (i % 4) { i++; } // 4byte alignment
239 image_data = indices_data;
240 } else if (color_type == PNG_COLOR_TYPE_RGB) {
241 swf_xrgb_t *xrgb_list;
242 xrgb_list = malloc(sizeof(swf_xrgb_t) * png_width * png_height);
243 for (y=0 ; y < png_height ; y++) {
244 for (x=0 ; x < png_width ; x++) {
245 xrgb_list[x+y*png_width].red = png_image_data[y][3*x + 0];
246 xrgb_list[x+y*png_width].green = png_image_data[y][3*x + 1];
247 xrgb_list[x+y*png_width].blue = png_image_data[y][3*x + 2];
250 image_data = xrgb_list;
251 } else { // PNG_COLOR_TYPE_RGB_ALPHA
252 swf_argb_t *argb_list;
253 argb_list = malloc(sizeof(swf_argb_t) * png_width * png_height);
254 for (y=0 ; y < png_height ; y++) {
255 for (x=0 ; x < png_width ; x++) {
256 int alpha_value = png_image_data[y][4*x + 3];
257 argb_list[x+y*png_width].red = png_image_data[y][4*x + 0] * alpha_value / 0xff;
258 argb_list[x+y*png_width].green = png_image_data[y][4*x + 1] * alpha_value / 0xff;
259 argb_list[x+y*png_width].blue = png_image_data[y][4*x + 2] * alpha_value / 0xff;
260 argb_list[x+y*png_width].alpha = alpha_value;
263 image_data = argb_list;
265 for (y=0 ; y < png_height ; y++) {
266 free(png_image_data[y]);
268 free(png_image_data);
272 png_destroy_read_struct((png_structpp) &png_ptr,
273 (png_infopp) &png_info_ptr, NULL);
278 pngconv_lossless2png(void *image_data,
279 unsigned short width, unsigned short height,
281 unsigned short index_data_count,
282 int tag_no, int format,
283 unsigned long *length) {
284 volatile png_structp png_ptr = NULL;
285 volatile png_infop png_info_ptr = NULL;
286 volatile my_png_buffer png_buff;
287 png_uint_32 png_width = 0, png_height = 0;
289 volatile png_bytepp png_image_data = NULL;
291 volatile png_colorp png_palette = NULL;
292 if (image_data == NULL) {
293 fprintf(stderr, "pngconv_lossless2png: image_data == NULL\n");
296 if ((format != 3) && (format != 5)) {
297 fprintf(stderr, "jpegconv_lossless2png: format=%d not implemented yes.\n", format);
300 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL,NULL,NULL);
302 fprintf(stderr, "jpegconv_lossless2png: can't create write_struct\n");
305 if (setjmp(png_jmpbuf(png_ptr))) {
306 fprintf(stderr, "pngconv_lossless2png: libpng error jump occured\n");
308 if (png_image_data) {
309 for (y=0 ; y < png_height ; y++) {
310 free(png_image_data[y]);
312 free(png_image_data);
315 png_destroy_write_struct((png_structpp) &png_ptr,
316 (png_infopp) &png_info_ptr);
319 png_info_ptr = png_create_info_struct(png_ptr);
320 if (! png_info_ptr) {
321 fprintf(stderr, "jpegconv_lossless2png: can't create info_struct\n");
322 png_destroy_write_struct((png_structpp) &png_ptr, NULL);
330 color_type = PNG_COLOR_TYPE_PALETTE;
331 } else if (tag_no == 20) { /* DefineBitsLossless */
332 color_type = PNG_COLOR_TYPE_RGB;
333 } else if (tag_no == 36) { /* DefineBitsLossless2 */
334 color_type = PNG_COLOR_TYPE_RGB_ALPHA;
336 fprintf(stderr, "jpegconv_lossless2png: format!=3 and tag_no=%d not implemented.\n",
338 png_destroy_write_struct((png_structpp) &png_ptr,
339 (png_infopp) &png_info_ptr);
342 png_set_filter(png_ptr, 0, PNG_ALL_FILTERS);
343 png_set_IHDR(png_ptr, png_info_ptr,
344 png_width, png_height, bpp, color_type,
345 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
346 PNG_FILTER_TYPE_DEFAULT);
349 if (index_data_count == 0) {
350 fprintf(stderr, "jpegconv_lossless2png: index_data_count == 0 at line(%d)\n", __LINE__);
351 png_destroy_write_struct((png_structpp) &png_ptr,
352 (png_infopp) &png_info_ptr);
355 png_palette = (png_colorp) malloc(sizeof(png_color)*index_data_count);
356 png_set_packing(png_ptr);
358 swf_rgb_t *rgb_list = index_data;
359 for (i=0 ; i < index_data_count ; i++) {
360 png_palette[i].red = rgb_list[i].red;
361 png_palette[i].green = rgb_list[i].green;
362 png_palette[i].blue = rgb_list[i].blue;
365 swf_rgba_t *rgba_list = index_data;
366 for (i=0 ; i < index_data_count ; i++) {
367 png_palette[i].red = rgba_list[i].red;
368 png_palette[i].green = rgba_list[i].green;
369 png_palette[i].blue = rgba_list[i].blue;
370 // png_palette[i].alpha = rgba_list[i].alpha;
373 png_set_PLTE( png_ptr, png_info_ptr, png_palette, index_data_count);
376 png_image_data = (png_bytepp) malloc(png_height * sizeof(png_bytep));
377 if (color_type == PNG_COLOR_TYPE_PALETTE) {
378 for (y=0 ; y < png_height ; y++) {
379 png_image_data[y] = (png_bytep) malloc(png_get_rowbytes(png_ptr, png_info_ptr));
380 for (x=0 ; x < png_width ; x++) {
381 unsigned char *data = image_data;
382 png_image_data[y][x] = data[x + y*((png_width +3) & -4)];
386 } else if (color_type == PNG_COLOR_TYPE_RGB) {
387 swf_xrgb_t *xrgb_list = image_data;
388 for (y=0 ; y < png_height ; y++) {
389 png_image_data[y] = (png_bytep) malloc(png_get_rowbytes(png_ptr, png_info_ptr)) \
391 for (x=0 ; x < png_width ; x++) {
392 png_image_data[y][3*x] = xrgb_list[x+y*png_width].red;
393 png_image_data[y][3*x+1] = xrgb_list[x+y*png_width].green;
394 png_image_data[y][3*x+2] = xrgb_list[x+y*png_width].blue;
398 swf_argb_t *argb_list = image_data;
399 for (y=0 ; y < png_height ; y++) {
400 png_image_data[y] = (png_bytep) malloc(png_get_rowbytes(png_ptr, png_info_ptr));
401 for (x=0 ; x < png_width ; x++) {
402 png_image_data[y][4*x] = argb_list[x+y*png_width].red;
403 png_image_data[y][4*x+1] = argb_list[x+y*png_width].green;
404 png_image_data[y][4*x+2] = argb_list[x+y*png_width].blue;
405 png_image_data[y][4*x+3] = argb_list[x+y*png_width].alpha;
410 png_buff.data = NULL;
411 png_buff.data_len = 0;
412 png_buff.data_offset = 0;
413 png_data_write((png_structp) png_ptr, (my_png_buffer*) &png_buff);
415 png_write_info(png_ptr, png_info_ptr);
416 png_write_image(png_ptr, png_image_data);
417 png_write_end(png_ptr, png_info_ptr);
419 for (y=0 ; y < png_height ; y++) {
420 free(png_image_data[y]);
422 free(png_image_data);
423 png_destroy_write_struct((png_structpp) &png_ptr,
424 (png_infopp) &png_info_ptr);
425 *length = png_buff.data_offset;
426 return png_buff.data;
429 #endif /* HAVE_PNG */