Cross Reference: /osnet-11/usr/src/grub/grub2/grub-core/video/readers/png.c

Lines Matching refs:data
122 grub_png_get_dword (struct grub_png_data *data)
127   grub_file_read (data->file, &r, sizeof (grub_uint32_t));
133 grub_png_get_byte (struct grub_png_data *data)
137   if ((data->inside_idat) && (data->idat_remain == 0))
144 	  grub_png_get_dword (data);
146           if (data->file->offset != data->next_offset)
153 	  len = grub_png_get_dword (data);
154 	  type = grub_png_get_dword (data);
158 			  "png: unexpected end of data");
162           data->next_offset = data->file->offset + len + 4;
165       data->idat_remain = len;
169   grub_file_read (data->file, &r, 1);
171   if (data->inside_idat)
172     data->idat_remain--;
178 grub_png_get_bits (struct grub_png_data *data, int num)
182   if (data->bit_count == 0)
184       data->bit_save = grub_png_get_byte (data);
185       data->bit_count = 8;
194       n = data->bit_count;
198       code += (int) (data->bit_save & ((1 << n) - 1)) << shift;
202 	  data->bit_count -= n;
203 	  data->bit_save >>= n;
209       data->bit_save = grub_png_get_byte (data);
210       data->bit_count = 8;
217 grub_png_decode_image_header (struct grub_png_data *data)
222   data->image_width = grub_png_get_dword (data);
223   data->image_height = grub_png_get_dword (data);
225   if ((!data->image_height) || (!data->image_width))
228   color_bits = grub_png_get_byte (data);
232   data->is_16bit = (color_bits == 16);
234   color_type = grub_png_get_byte (data);
237       if (grub_video_bitmap_create (data->bitmap, data->image_width,
238 				    data->image_height,
241       data->bpp = 3;
245       if (grub_video_bitmap_create (data->bitmap, data->image_width,
246 				    data->image_height,
249       data->bpp = 4;
255   if (data->is_16bit)
257       data->bpp <<= 1;
259       data->image_data = grub_malloc (data->image_height *
260                                       data->image_width *  data->bpp);
264       data->cur_rgb = data->image_data;
268       data->image_data = 0;
269       data->cur_rgb = (*data->bitmap)->data;
272   data->raw_bytes = data->image_height * (data->image_width + 1) * data->bpp;
274   data->cur_column = 0;
275   data->first_line = 1;
277   if (grub_png_get_byte (data) != PNG_COMPRESSION_BASE)
281   if (grub_png_get_byte (data) != PNG_FILTER_TYPE_BASE)
285   if (grub_png_get_byte (data) != PNG_INTERLACE_NONE)
290   grub_png_get_dword (data);
384 grub_png_get_huff_code (struct grub_png_data *data, struct huff_table *ht)
391       code = (code << 1) + grub_png_get_bits (data, 1);
399 grub_png_init_fixed_block (struct grub_png_data *data)
403   grub_png_init_huff_table (&data->code_table, DEFLATE_HUFF_LEN,
404 			    data->code_values, data->code_maxval,
405 			    data->code_offset);
408     grub_png_insert_huff_item (&data->code_table, i, 8);
411     grub_png_insert_huff_item (&data->code_table, i, 9);
414     grub_png_insert_huff_item (&data->code_table, i, 7);
417     grub_png_insert_huff_item (&data->code_table, i, 8);
419   grub_png_build_huff_table (&data->code_table);
421   grub_png_init_huff_table (&data->dist_table, DEFLATE_HUFF_LEN,
422 			    data->dist_values, data->dist_maxval,
423 			    data->dist_offset);
426     grub_png_insert_huff_item (&data->dist_table, i, 5);
428   grub_png_build_huff_table (&data->dist_table);
434 grub_png_init_dynamic_block (struct grub_png_data *data)
443   nl = DEFLATE_HLIT_BASE + grub_png_get_bits (data, 5);
444   nd = DEFLATE_HDIST_BASE + grub_png_get_bits (data, 5);
445   nb = DEFLATE_HCLEN_BASE + grub_png_get_bits (data, 4);
449     return grub_error (GRUB_ERR_BAD_FILE_TYPE, "png: too much data");
454     lens[bitorder[i]] = grub_png_get_bits (data, 3);
464   grub_png_init_huff_table (&data->code_table, DEFLATE_HUFF_LEN,
465 			    data->code_values, data->code_maxval,
466 			    data->code_offset);
468   grub_png_init_huff_table (&data->dist_table, DEFLATE_HUFF_LEN,
469 			    data->dist_values, data->dist_maxval,
470 			    data->dist_offset);
483 	  ht = &data->code_table;
488 	  ht = &data->dist_table;
492       n = grub_png_get_huff_code (data, &cl);
502 	  c = 3 + grub_png_get_bits (data, 2);
512 	i += 3 + grub_png_get_bits (data, 3) - 1;
514 	i += 11 + grub_png_get_bits (data, 7) - 1;
517   grub_png_build_huff_table (&data->code_table);
518   grub_png_build_huff_table (&data->dist_table);
524 grub_png_output_byte (struct grub_png_data *data, grub_uint8_t n)
528   if (--data->raw_bytes < 0)
531   if (data->cur_column == 0)
536       data->cur_filter = n;
539     *(data->cur_rgb++) = n;
541   data->cur_column++;
542   row_bytes = data->image_width * data->bpp;
543   if (data->cur_column == row_bytes + 1)
546       grub_uint8_t *cur = data->cur_rgb - row_bytes;
550       if (data->first_line)
561       switch (data->cur_filter)
567 	    cur += data->bpp;
568 	    for (i = data->bpp; i < row_bytes; i++, cur++, left++)
586 	    for (i = 0; i < data->bpp; i++, cur++, up++)
599 	    for (i = 0; i < data->bpp; i++, cur++, up++)
630       data->cur_column = 0;
631       data->first_line = 0;
638 grub_png_read_dynamic_block (struct grub_png_data *data)
644       n = grub_png_get_huff_code (data, &data->code_table);
647 	  data->slide[data->wp] = n;
648 	  grub_png_output_byte (data, n);
650 	  data->wp++;
651 	  if (data->wp >= WSIZE)
652 	    data->wp = 0;
663 	    len += grub_png_get_bits (data, cplext[n]);
665 	  n = grub_png_get_huff_code (data, &data->dist_table);
668 	    dist += grub_png_get_bits (data, cpdext[n]);
670 	  pos = data->wp - dist;
676 	      data->slide[data->wp] = data->slide[pos];
677 	      grub_png_output_byte (data, data->slide[data->wp]);
679 	      data->wp++;
680 	      if (data->wp >= WSIZE)
681 		data->wp = 0;
696 grub_png_decode_image_data (struct grub_png_data *data)
701   cmf = grub_png_get_byte (data);
702   flg = grub_png_get_byte (data);
716       final = grub_png_get_bits (data, 1);
717       block_type = grub_png_get_bits (data, 2);
725 	    data->bit_count = 0;
726 	    len = grub_png_get_byte (data);
727 	    len += ((grub_uint16_t) grub_png_get_byte (data)) << 8;
730 	    grub_png_get_byte (data);
731 	    grub_png_get_byte (data);
734 	      grub_png_output_byte (data, grub_png_get_byte (data));
740           grub_png_init_fixed_block (data);
741 	  grub_png_read_dynamic_block (data);
745 	  grub_png_init_dynamic_block (data);
746 	  grub_png_read_dynamic_block (data);
757   grub_png_get_dword (data);
760   grub_png_get_dword (data);
769 grub_png_convert_image (struct grub_png_data *data)
774   d1 = (*data->bitmap)->data;
775   d2 = data->image_data + 1;
778   for (i = 0; i < (data->image_width * data->image_height * data->bpp >> 1);
784 grub_png_decode_png (struct grub_png_data *data)
788   if (grub_file_read (data->file, &magic[0], 8) != 8)
798       len = grub_png_get_dword (data);
799       type = grub_png_get_dword (data);
800       data->next_offset = data->file->offset + len + 4;
805 	  grub_png_decode_image_header (data);
809 	  data->inside_idat = 1;
810 	  data->idat_remain = len;
811 	  data->bit_count = 0;
813 	  grub_png_decode_image_data (data);
815 	  data->inside_idat = 0;
819           if (data->is_16bit)
820             grub_png_convert_image (data);
825 	  grub_file_seek (data->file, data->file->offset + len + 4);
831       if (data->file->offset != data->next_offset)
844   struct grub_png_data *data;
850   data = grub_zalloc (sizeof (*data));
851   if (data != NULL)
853       data->file = file;
854       data->bitmap = bitmap;
856       grub_png_decode_png (data);
858       grub_free (data->image_data);
859       grub_free (data);