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annotate src/img_ldr.c @ 688:cadebc13be2f

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author Thinker K.F. Li <thinker@branda.to>
date Sat, 07 Aug 2010 22:28:17 +0800
parents 818e870e1eb5
children 586e50f82c1f
rev   line source
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1 #include <stdio.h>
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2 #include <string.h>
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3 #include "mb_graph_engine.h"
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4 #include "mb_tools.h"
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5 #include "mb_paint.h"
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6 #include "mb_img_ldr.h"
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7
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8 /*! \brief Simple image loader.
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9 *
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10 */
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11 struct _simple_mb_img_ldr {
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12 mb_img_ldr_t ldr;
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13 const char *repo; /*!< \brief The directory of repository. */
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14 };
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15 typedef struct _simple_mb_img_ldr simple_mb_img_ldr_t;
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16
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17 struct _simple_mb_img_data {
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18 mb_img_data_t img;
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19 mbe_surface_t *surf;
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20 };
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21 typedef struct _simple_mb_img_data simple_mb_img_data_t;
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22
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23 static void simple_mb_img_ldr_img_free(mb_img_data_t *img);
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24
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25 static
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26 mb_img_data_t *simple_mb_img_ldr_load(mb_img_ldr_t *ldr, const char *img_id) {
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27 simple_mb_img_ldr_t *sldr = (simple_mb_img_ldr_t *)ldr;
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28 simple_mb_img_data_t *img;
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29 mbe_surface_t *surf;
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30 char *fname;
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31 int sz;
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32
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33 sz = strlen(sldr->repo);
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34 sz += strlen(img_id);
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35 fname = (char *)malloc(sz + 2);
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36 if (img_id[0] != '/')
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37 strcpy(fname, sldr->repo);
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38 else
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39 fname[0] = 0;
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40 strcat(fname, img_id);
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41
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42 surf = mbe_image_surface_create_from_png(fname);
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43 if(surf == NULL)
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44 return NULL;
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45
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46 img = O_ALLOC(simple_mb_img_data_t);
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47 if(img == NULL) {
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48 mbe_surface_destroy(surf);
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49 return NULL;
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50 }
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51 img->img.content = mbe_image_surface_get_data(surf);
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52 img->img.w = mbe_image_surface_get_width(surf);
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53 img->img.h = mbe_image_surface_get_height(surf);
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54 img->img.stride = mbe_image_surface_get_stride(surf);
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55 img->img.fmt = mbe_image_surface_get_format(surf);
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56 img->img.free = simple_mb_img_ldr_img_free;
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57 img->surf = surf;
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58
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59 return (mb_img_data_t *)img;
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60 }
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61
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62 static
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63 void simple_mb_img_ldr_img_free(mb_img_data_t *img) {
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64 simple_mb_img_data_t *simg = (simple_mb_img_data_t *)img;
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65 mbe_surface_destroy((mbe_surface_t *)simg->surf);
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66 free(img);
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67 }
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68
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69 static
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70 void simple_mb_img_ldr_free(mb_img_ldr_t *ldr) {
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71 simple_mb_img_ldr_t *defldr = (simple_mb_img_ldr_t *)ldr;
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72
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73 free((void *)defldr->repo);
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74 }
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75
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76 mb_img_ldr_t *simple_mb_img_ldr_new(const char *img_repository) {
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77 simple_mb_img_ldr_t *ldr;
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78 int sz;
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79
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80 if(img_repository == NULL)
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81 return NULL;
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82
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83 ldr = O_ALLOC(simple_mb_img_ldr_t);
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84 if(ldr == NULL)
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85 return NULL;
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86
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87 /*
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88 * Copy and formalize path of image repository.
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89 */
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90 sz = strlen(img_repository);
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91 ldr->repo = (const char *)malloc(sz + 2);
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92 if(ldr->repo == NULL) {
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93 free(ldr);
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94 return NULL;
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95 }
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96 strcpy((char *)ldr->repo, img_repository);
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97 if(img_repository[sz - 1] != '/' && strlen(img_repository) != 0) {
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98 ((char *)ldr->repo)[sz] = '/';
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99 ((char *)ldr->repo)[sz + 1] = 0;
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100 }
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101
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102 ldr->ldr.load = simple_mb_img_ldr_load;
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103 ldr->ldr.free = simple_mb_img_ldr_free;
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104
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105 return (mb_img_ldr_t *)ldr;
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106 }