src/swf_shape_record_edge.c

   1 #include <stdio.h>
   2 #include "bitstream.h"
   3 #include "swf_shape_record_edge.h"
   4 #include "swf_tag_shape.h"
   5
   6 int
   7 swf_shape_record_edge_parse(bitstream_t *bs,
   8                             swf_shape_record_edge_t *shape_record_edge,
   9                             swf_tag_t *tag) {
  10     int result;
  11     unsigned int shape_coord_real_size;
  12     swf_tag_shape_detail_t *swf_tag_shape = (swf_tag_shape_detail_t *) tag->detail;
  13
  14     result = bitstream_getbit(bs);
  15     if (result == -1) {
  16         return 1;
  17     }
  18     shape_record_edge->shape_record_type = result;
  19     shape_record_edge->shape_edge_type   = bitstream_getbit(bs);
  20     shape_record_edge->shape_coord_size  = bitstream_getbits(bs, 4);
  21     shape_coord_real_size = shape_record_edge->shape_coord_size + 2;
  22     if (shape_record_edge->shape_edge_type == 0) {
  23         signed control_delta_x, control_delta_y;
  24         signed anchor_delta_x, anchor_delta_y;
  25         control_delta_x = bitstream_getbits_signed(bs, shape_coord_real_size);
  26         control_delta_y = bitstream_getbits_signed(bs, shape_coord_real_size);
  27         anchor_delta_x = bitstream_getbits_signed(bs, shape_coord_real_size);
  28         anchor_delta_y = bitstream_getbits_signed(bs, shape_coord_real_size);
  29
  30         swf_tag_shape->_current_x += control_delta_x;
  31         swf_tag_shape->_current_y += control_delta_y;
  32         shape_record_edge->shape_control_x = swf_tag_shape->_current_x;
  33         shape_record_edge->shape_control_y = swf_tag_shape->_current_y;
  34         swf_tag_shape->_current_x += anchor_delta_x;
  35         swf_tag_shape->_current_y += anchor_delta_y;
  36         shape_record_edge->shape_anchor_x = swf_tag_shape->_current_x;
  37         shape_record_edge->shape_anchor_y = swf_tag_shape->_current_y;
  38     } else {
  39         shape_record_edge->shape_line_has_x_and_y = bitstream_getbit(bs);
  40         if (shape_record_edge->shape_line_has_x_and_y == 1) {
  41             signed delta_x, delta_y;
  42             delta_x = bitstream_getbits_signed(bs, shape_coord_real_size);
  43             delta_y = bitstream_getbits_signed(bs, shape_coord_real_size);
  44             swf_tag_shape->_current_x += delta_x;
  45             swf_tag_shape->_current_y += delta_y;
  46         } else {
  47             shape_record_edge->shape_line_has_x_or_y = bitstream_getbit(bs);
  48             if (shape_record_edge->shape_line_has_x_or_y == 0) {
  49                 signed delta_x;
  50                 delta_x = bitstream_getbits_signed(bs, shape_coord_real_size);
  51                 swf_tag_shape->_current_x += delta_x;
  52             } else {
  53                 signed delta_y;
  54                 delta_y = bitstream_getbits_signed(bs, shape_coord_real_size);
  55                 swf_tag_shape->_current_y += delta_y;
  56             }
  57         }
  58         shape_record_edge->shape_x = swf_tag_shape->_current_x;
  59         shape_record_edge->shape_y = swf_tag_shape->_current_y;
  60     }
  61     return 0;
  62 }
  63
  64 int
  65 swf_shape_record_edge_build(bitstream_t *bs,
  66                             swf_shape_record_edge_t *shape_record_edge,
  67                             swf_tag_t *tag) {
  68 //    int ret;
  69     unsigned int size, shape_coord_real_size = 2;
  70     swf_tag_shape_detail_t *swf_tag_shape = (swf_tag_shape_detail_t *) tag->detail;
  71
  72     bitstream_putbit(bs, shape_record_edge->shape_record_type);
  73     bitstream_putbit(bs, shape_record_edge->shape_edge_type);
  74
  75     if (shape_record_edge->shape_edge_type == 0) {
  76         size = bitstream_need_bits_signed(shape_record_edge->shape_control_x - swf_tag_shape->_current_x);
  77         shape_coord_real_size =  (shape_coord_real_size>size)?shape_coord_real_size:size;
  78         size = bitstream_need_bits_signed(shape_record_edge->shape_control_y - swf_tag_shape->_current_y);
  79         shape_coord_real_size =  (shape_coord_real_size>size)?shape_coord_real_size:size;
  80         size = bitstream_need_bits_signed(shape_record_edge->shape_anchor_x - shape_record_edge->shape_control_x);
  81         shape_coord_real_size =  (shape_coord_real_size>size)?shape_coord_real_size:size;
  82         size = bitstream_need_bits_signed(shape_record_edge->shape_anchor_y - shape_record_edge->shape_control_y);
  83         shape_coord_real_size =  (shape_coord_real_size>size)?shape_coord_real_size:size;
  84     } else {
  85         size = bitstream_need_bits_signed(shape_record_edge->shape_x - swf_tag_shape->_current_x);
  86         shape_coord_real_size =  (shape_coord_real_size>size)?shape_coord_real_size:size;
  87         size = bitstream_need_bits_signed(shape_record_edge->shape_y - swf_tag_shape->_current_y);
  88         shape_coord_real_size =  (shape_coord_real_size>size)?shape_coord_real_size:size;
  89     }
  90     shape_record_edge->shape_coord_size = shape_coord_real_size - 2;
  91     bitstream_putbits(bs, shape_record_edge->shape_coord_size, 4);
  92
  93     if (shape_record_edge->shape_edge_type == 0) {
  94         signed control_delta_x = shape_record_edge->shape_control_x - swf_tag_shape->_current_x;
  95         signed control_delta_y = shape_record_edge->shape_control_y - swf_tag_shape->_current_y;
  96         signed anchor_delta_x = shape_record_edge->shape_anchor_x - shape_record_edge->shape_control_x;
  97         signed anchor_delta_y = shape_record_edge->shape_anchor_y - shape_record_edge->shape_control_y;
  98         bitstream_putbits_signed(bs, control_delta_x, shape_coord_real_size);
  99         bitstream_putbits_signed(bs, control_delta_y, shape_coord_real_size);
 100         bitstream_putbits_signed(bs, anchor_delta_x, shape_coord_real_size);
 101         bitstream_putbits_signed(bs, anchor_delta_y, shape_coord_real_size);
 102         swf_tag_shape->_current_x = shape_record_edge->shape_anchor_x;
 103         swf_tag_shape->_current_y = shape_record_edge->shape_anchor_y;
 104     } else {
 105         signed delta_x = shape_record_edge->shape_x - swf_tag_shape->_current_x;
 106         signed delta_y = shape_record_edge->shape_y - swf_tag_shape->_current_y;
 107         if (delta_x && delta_y) {
 108             shape_record_edge->shape_line_has_x_and_y = 1;
 109         } else {
 110             shape_record_edge->shape_line_has_x_and_y = 0;
 111         }
 112         bitstream_putbit(bs, shape_record_edge->shape_line_has_x_and_y);
 113         if (shape_record_edge->shape_line_has_x_and_y == 1) {
 114             bitstream_putbits_signed(bs, delta_x, shape_coord_real_size);
 115             bitstream_putbits_signed(bs, delta_y, shape_coord_real_size);
 116         } else {
 117             if (delta_x) {
 118                 shape_record_edge->shape_line_has_x_or_y = 0;
 119             } else {
 120                 shape_record_edge->shape_line_has_x_or_y = 1;
 121             }
 122             bitstream_putbit(bs, shape_record_edge->shape_line_has_x_or_y);
 123             if (shape_record_edge->shape_line_has_x_or_y == 0) {
 124                 bitstream_putbits_signed(bs, delta_x, shape_coord_real_size);
 125             } else {
 126                 bitstream_putbits_signed(bs, delta_y, shape_coord_real_size);
 127             }
 128         }
 129         swf_tag_shape->_current_x = shape_record_edge->shape_x;
 130         swf_tag_shape->_current_y = shape_record_edge->shape_y;
 131     }
 132     return 0;
 133 }
 134
 135 int
 136 swf_shape_record_edge_print(swf_shape_record_edge_t *shape_record_edge,
 137                             int indent_depth) {
 138     print_indent(indent_depth);
 139     printf("shape_edge_type=%d  (shape_coord_size=%d+2)\n",
 140            shape_record_edge->shape_edge_type ,
 141            shape_record_edge->shape_coord_size);
 142     if (shape_record_edge->shape_edge_type == 0) {
 143         print_indent(indent_depth);
 144         printf("shape_control_(x,y)=(%.2f,%.2f)  shape_anchor_(x,y)=(%.2f,%.2f)\n",
 145                (float) shape_record_edge->shape_control_x / SWF_TWIPS,
 146                (float) shape_record_edge->shape_control_y / SWF_TWIPS,
 147                (float) shape_record_edge->shape_anchor_x / SWF_TWIPS,
 148                (float) shape_record_edge->shape_anchor_y / SWF_TWIPS);
 149     } else {
 150         print_indent(indent_depth);
 151 /*
 152   printf("shape_line_has_(x_and_y, x_or_y)=(%d, %d)  ",
 153                shape_record_edge->shape_line_has_x_and_y,
 154                shape_record_edge->shape_line_has_x_or_y);
 155 */
 156         printf("shape_(x,y)=(%.2f,%.2f)\n",
 157                (float) shape_record_edge->shape_x / SWF_TWIPS,
 158                (float) shape_record_edge->shape_y / SWF_TWIPS);
 159     }
 160     return 0;
 161 }