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annotate src/img_ldr.c @ 988:bc8cfcd40d0e refine_backend_if

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Rename _x_mb_io_man* to _x_supp_io_man*
author Thinker K.F. Li <thinker@codemud.net>
date Mon, 22 Nov 2010 00:42:29 +0800
parents 586e50f82c1f
children 7b4e80ab671a
rev   line source
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1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
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2 // vim: sw=4:ts=8:sts=4
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3 #include <stdio.h>
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4 #include <string.h>
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5 #include "mb_graph_engine.h"
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6 #include "mb_tools.h"
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7 #include "mb_paint.h"
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8 #include "mb_img_ldr.h"
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9
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10 /*! \brief Simple image loader.
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11 *
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12 */
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13 struct _simple_mb_img_ldr {
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14 mb_img_ldr_t ldr;
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15 const char *repo; /*!< \brief The directory of repository. */
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16 };
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17 typedef struct _simple_mb_img_ldr simple_mb_img_ldr_t;
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18
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19 struct _simple_mb_img_data {
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20 mb_img_data_t img;
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21 mbe_surface_t *surf;
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22 };
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23 typedef struct _simple_mb_img_data simple_mb_img_data_t;
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24
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25 static void simple_mb_img_ldr_img_free(mb_img_data_t *img);
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26
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27 static
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28 mb_img_data_t *simple_mb_img_ldr_load(mb_img_ldr_t *ldr, const char *img_id) {
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29 simple_mb_img_ldr_t *sldr = (simple_mb_img_ldr_t *)ldr;
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30 simple_mb_img_data_t *img;
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31 mbe_surface_t *surf;
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32 char *fname;
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33 int sz;
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34
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35 sz = strlen(sldr->repo);
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36 sz += strlen(img_id);
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37 fname = (char *)malloc(sz + 2);
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38 if (img_id[0] != '/')
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39 strcpy(fname, sldr->repo);
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40 else
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41 fname[0] = 0;
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42 strcat(fname, img_id);
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43
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44 surf = mbe_image_surface_create_from_png(fname);
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45 if(surf == NULL)
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46 return NULL;
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47
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48 img = O_ALLOC(simple_mb_img_data_t);
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49 if(img == NULL) {
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50 mbe_surface_destroy(surf);
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51 return NULL;
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52 }
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53 img->img.content = mbe_image_surface_get_data(surf);
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54 img->img.w = mbe_image_surface_get_width(surf);
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55 img->img.h = mbe_image_surface_get_height(surf);
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56 img->img.stride = mbe_image_surface_get_stride(surf);
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57 img->img.fmt = mbe_image_surface_get_format(surf);
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58 img->img.free = simple_mb_img_ldr_img_free;
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59 img->surf = surf;
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60
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61 return (mb_img_data_t *)img;
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62 }
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63
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64 static
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65 void simple_mb_img_ldr_img_free(mb_img_data_t *img) {
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66 simple_mb_img_data_t *simg = (simple_mb_img_data_t *)img;
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67 mbe_surface_destroy((mbe_surface_t *)simg->surf);
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68 free(img);
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69 }
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70
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71 static
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72 void simple_mb_img_ldr_free(mb_img_ldr_t *ldr) {
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73 simple_mb_img_ldr_t *defldr = (simple_mb_img_ldr_t *)ldr;
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74
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75 free((void *)defldr->repo);
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76 }
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77
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78 mb_img_ldr_t *simple_mb_img_ldr_new(const char *img_repository) {
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79 simple_mb_img_ldr_t *ldr;
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80 int sz;
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81
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82 if(img_repository == NULL)
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83 return NULL;
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84
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85 ldr = O_ALLOC(simple_mb_img_ldr_t);
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86 if(ldr == NULL)
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87 return NULL;
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88
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89 /*
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90 * Copy and formalize path of image repository.
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91 */
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92 sz = strlen(img_repository);
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93 ldr->repo = (const char *)malloc(sz + 2);
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94 if(ldr->repo == NULL) {
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95 free(ldr);
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96 return NULL;
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97 }
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98 strcpy((char *)ldr->repo, img_repository);
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99 if(img_repository[sz - 1] != '/' && strlen(img_repository) != 0) {
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100 ((char *)ldr->repo)[sz] = '/';
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101 ((char *)ldr->repo)[sz + 1] = 0;
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102 }
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103
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104 ldr->ldr.load = simple_mb_img_ldr_load;
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105 ldr->ldr.free = simple_mb_img_ldr_free;
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106
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107 return (mb_img_ldr_t *)ldr;
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108 }