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annotate src/shape_image.c @ 257:50d253d0fcba

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Simple image loader and image shape. - img_ldr.c is a simple image loader that rooted on a directory specified when a loader instance been created. - sh_image_t is corresponding shape of image tag in SVG. - This changeset is still buggy. It need more testing. - svg2code.py is not ready for image tag.
author Thinker K.F. Li <thinker@branda.to>
date Thu, 15 Jan 2009 16:46:47 +0800
parents
children 29acbd8a0dd0
rev   line source
257
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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diff changeset
1 #include <stdio.h>
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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2 #include <string.h>
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3 #include <cairo.h>
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4 #include "mb_types.h"
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5 #include "mb_shapes.h"
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6 #include "mb_img_ldr.h"
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7 #include "mb_tools.h"
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8
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9 #define ASSERT(x)
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10 #define OK 0
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11 #define ERR -1
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12
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13 typedef struct _sh_image {
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14 shape_t shape;
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15
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16 co_aix x, y;
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17 co_aix w, h;
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18
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19 mb_img_data_t *img_data;
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20 cairo_surface_t *surf;
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21 } sh_image_t;
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22
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23 static void sh_image_free(shape_t *shape);
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24
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25 /*! \brief Creae a new image shape.
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26 *
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27 * \param img_data is image data whose owner-ship is transfered.
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28 */
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29 shape_t *rdman_shape_image_new(redraw_man_t *rdman, mb_img_data_t *img_data,
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30 co_aix x, co_aix y, co_aix w, co_aix h) {
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31 sh_image_t *img;
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32 cairo_format_t fmt;
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33
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34 img = O_ALLOC(sh_image_t);
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35 if(img == NULL)
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36 return NULL;
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37
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38 memset(img, 0, sizeof(sh_image_t));
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39
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40 img->shape.free = sh_image_free;
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41 mb_obj_init((mb_obj_t *)img, MBO_IMAGE);
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42 img->x = x;
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43 img->y = y;
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44 img->w = w;
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45 img->h = h;
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46 img->img_data = img_data;
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47
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48 switch(img_data->fmt) {
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49 case MB_IFMT_ARGB32:
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50 fmt = CAIRO_FORMAT_ARGB32;
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51 break;
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52
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53 case MB_IFMT_RGB24:
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54 fmt = CAIRO_FORMAT_RGB24;
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55 break;
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56
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57 case MB_IFMT_A8:
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58 fmt = CAIRO_FORMAT_A8;
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59 break;
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60
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61 case MB_IFMT_A1:
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62 fmt = CAIRO_FORMAT_A1;
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63 break;
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64
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65 case MB_IFMT_RGB16_565:
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66 fmt = CAIRO_FORMAT_RGB16_565;
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67 break;
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68
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69 default:
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70 mb_obj_destroy(img);
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71 free(img);
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72 return NULL;
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73 }
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74
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75 img->surf = cairo_image_surface_create_for_data(img_data->content,
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76 fmt,
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77 img_data->width,
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78 img_data->height,
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79 img_data->stride);
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80 if(img->surf == NULL) {
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81 mb_obj_destroy(img);
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82 free(img);
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83 return NULL;
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84 }
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85
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86 return (shape_t *)img;
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87 }
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88
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89 void sh_image_free(shape_t *shape) {
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90 sh_image_t *img = (sh_image_t *)shape;
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91
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92 mb_obj_destroy(shape);
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93 MB_IMG_DATA_FREE(img->img_data);
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94 cairo_surface_destroy(img->surf);
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95 free(img);
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96 }
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97
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98 void sh_image_transform(shape_t *shape) {
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99 sh_image_t *img = (sh_image_t *)shape;
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100 co_aix poses[4][2];
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101 int i;
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102
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103 poses[0][0] = img->x;
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104 poses[0][1] = img->y;
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105 poses[1][0] = img->x + img->w;
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106 poses[1][1] = img->y;
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107 poses[2][0] = img->x + img->w;
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108 poses[2][1] = img->y + img->h;
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109 poses[3][0] = img->x;
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110 poses[3][1] = img->y + img->h;
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111 for(i = 0; i < 4; i++)
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112 coord_trans_pos(img->shape.coord, &poses[i][0], &poses[i][1]);
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113
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114 geo_from_positions(sh_get_geo(shape), 4, poses);
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115 }
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116
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117 /*! \brief Draw image for an image shape.
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118 *
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119 * \note Image is not rescaled for size of the shape.
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120 */
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121 void sh_image_draw(shape_t *shape, cairo_t *cr) {
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122 sh_image_t *img = (sh_image_t *)shape;
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123 cairo_pattern_t *saved_source;
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124 cairo_matrix_t matrix, saved_matrix;
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125 co_aix *aggr;
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126
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127 aggr = coord_get_aggr_matrix(sh_get_coord(shape));
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128 cairo_matrix_init(&matrix,
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129 aggr[0], aggr[3],
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130 aggr[1], aggr[4],
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131 aggr[2], aggr[5]);
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132
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133 /* set matrix */
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134 cairo_get_matrix(cr, &saved_matrix);
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135 cairo_set_matrix(cr, &matrix);
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136
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137 /* set source */
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138 saved_source = cairo_get_source(cr);
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139 cairo_pattern_reference(saved_source);
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140
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141 /* draw image */
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142 cairo_set_source_surface(cr, img->surf, 0, 0);
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143 cairo_paint(cr);
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144
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145 /* restore source */
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146 cairo_set_source(cr, saved_source);
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147 cairo_pattern_destroy(saved_source);
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148
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149 /* restore matrix */
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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150 cairo_set_matrix(cr, &saved_matrix);
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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151 }
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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152
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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153 void sh_image_set(shape_t *shape, co_aix x, co_aix y,
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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154 co_aix w, co_aix h) {
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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155 sh_image_t *img = (sh_image_t *)shape;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
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156
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
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157 img->x = x;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
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158 img->y = y;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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159 img->w = w;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
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160 img->h = h;
50d253d0fcba Simple image loader and image shape.
Thinker K.F. Li <thinker@branda.to>
parents:
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161 }