src/swf_rect.c

   1 #include <stdio.h>
   2 #include "bitstream.h"
   3 #include "swf_rect.h"
   4
   5 int
   6 swf_rect_parse(bitstream_t *bs, swf_rect_t *rect) {
   7     int size;
   8     bitstream_align(bs);
   9     size = bitstream_getbits(bs, 5);
  10     if (size == -1) {
  11         return 1;
  12     }
  13     rect->size = size;
  14     rect->x_min = bitstream_getbits_signed(bs, size);
  15     rect->x_max = bitstream_getbits_signed(bs, size);
  16     rect->y_min = bitstream_getbits_signed(bs, size);
  17     rect->y_max = bitstream_getbits_signed(bs, size);
  18     return 0;
  19 }
  20
  21 int
  22 swf_rect_build(bitstream_t *bs, swf_rect_t *rect) {
  23     register unsigned char size;
  24     unsigned char x_min_bits = bitstream_need_bits_signed(rect->x_min);
  25     unsigned char x_max_bits = bitstream_need_bits_signed(rect->x_max);
  26     unsigned char y_min_bits = bitstream_need_bits_signed(rect->y_min);
  27     unsigned char y_max_bits = bitstream_need_bits_signed(rect->y_max);
  28     size = (x_min_bits>x_max_bits)?x_min_bits:x_max_bits;
  29     size = (size>y_min_bits)?size:y_min_bits;
  30     size = (size>y_max_bits)?size:y_max_bits;
  31
  32     bitstream_align(bs);
  33     bitstream_putbits(bs, size, 5);
  34     bitstream_putbits_signed(bs, rect->x_min, size);
  35     bitstream_putbits_signed(bs, rect->x_max, size);
  36     bitstream_putbits_signed(bs, rect->y_min, size);
  37     bitstream_putbits_signed(bs, rect->y_max, size);
  38     return 0;
  39 }
  40
  41 int
  42 swf_rect_print(swf_rect_t *rect, int indent_depth) {
  43     print_indent(indent_depth);
  44     printf("rect=(%d, %d)-(%d, %d) (f_size=%d)\n",
  45            rect->x_min / SWF_TWIPS,
  46            rect->y_min / SWF_TWIPS,
  47            rect->x_max / SWF_TWIPS,
  48            rect->y_max / SWF_TWIPS,
  49            rect->size);
  50     return 0;
  51 }
  52
  53 int swf_rect_apply_factor(swf_rect_t *rect,
  54                           double scale_x, double scale_y,
  55                           signed int trans_x, signed int trans_y) {
  56     int size_x = rect->x_max - rect->x_min;
  57     int size_y = rect->y_max - rect->y_min;
  58     rect->x_max = rect->x_min + size_x * scale_x;
  59     rect->y_max = rect->y_min + size_y * scale_y;
  60     rect->x_min += trans_x * SWF_TWIPS;
  61     rect->x_max += trans_x * SWF_TWIPS;
  62     rect->y_min += trans_y * SWF_TWIPS;
  63     rect->y_max += trans_y * SWF_TWIPS;
  64     return 0;
  65 }