libresman

annotate examples/imgthumbs/src/thumbs.c @ 16:0a789208498d

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fixed resman.def added debug mode in thumbs.c
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 11 Feb 2014 18:47:33 +0200
parents a42888d26839
children 43a9fe4a80ee
rev   line source
nuclear@1 1 #include <stdio.h>
nuclear@1 2 #include <stdlib.h>
nuclear@1 3 #include <string.h>
nuclear@1 4 #include <errno.h>
nuclear@11 5 #include <assert.h>
nuclear@1 6 #include <dirent.h>
nuclear@1 7 #include <imago2.h>
nuclear@1 8 #include "opengl.h"
nuclear@1 9 #include "thumbs.h"
nuclear@11 10 #include "resman.h"
nuclear@1 11
nuclear@16 12 #define DBG_SYNC
nuclear@16 13
nuclear@6 14 #ifndef GL_COMPRESSED_RGB
nuclear@6 15 #define GL_COMPRESSED_RGB 0x84ed
nuclear@6 16 #endif
nuclear@6 17
nuclear@11 18 struct resman *texman;
nuclear@11 19
nuclear@11 20 static int load_res_texture(const char *fname, int id, void *cls);
nuclear@11 21 static int done_res_texture(int id, void *cls);
nuclear@11 22 static void free_res_texture(int id, void *cls);
nuclear@11 23
nuclear@11 24
nuclear@1 25 struct thumbnail *create_thumbs(const char *dirpath)
nuclear@1 26 {
nuclear@1 27 DIR *dir;
nuclear@1 28 struct dirent *dent;
nuclear@13 29 /* allocate dummy head node */
nuclear@13 30 struct thumbnail *list = calloc(1, sizeof *list);
nuclear@1 31
nuclear@11 32 if(!texman) {
nuclear@11 33 texman = resman_create();
nuclear@11 34 resman_set_load_func(texman, load_res_texture, 0);
nuclear@11 35 resman_set_done_func(texman, done_res_texture, 0);
nuclear@11 36 resman_set_destroy_func(texman, free_res_texture, 0);
nuclear@2 37 }
nuclear@2 38
nuclear@1 39 if(!(dir = opendir(dirpath))) {
nuclear@1 40 fprintf(stderr, "failed to open directory: %s: %s\n", dirpath, strerror(errno));
nuclear@1 41 return 0;
nuclear@1 42 }
nuclear@1 43
nuclear@1 44 while((dent = readdir(dir))) {
nuclear@16 45 #ifdef DBG_SYNC
nuclear@16 46 int xsz, ysz;
nuclear@16 47 unsigned char *pixels;
nuclear@16 48 #endif
nuclear@1 49 struct thumbnail *node;
nuclear@1 50
nuclear@1 51 if(!(node = malloc(sizeof *node))) {
nuclear@1 52 perror("failed to allocate thumbnail list node");
nuclear@1 53 continue;
nuclear@1 54 }
nuclear@11 55 memset(node, 0, sizeof *node);
nuclear@1 56
nuclear@1 57 if(!(node->fname = malloc(strlen(dirpath) + strlen(dent->d_name) + 2))) {
nuclear@1 58 free(node);
nuclear@1 59 continue;
nuclear@1 60 }
nuclear@1 61 strcpy(node->fname, dirpath);
nuclear@1 62 if(dirpath[strlen(dirpath) - 1] != '/') {
nuclear@1 63 strcat(node->fname, "/");
nuclear@1 64 }
nuclear@1 65 strcat(node->fname, dent->d_name);
nuclear@1 66
nuclear@16 67 node->aspect = 1.0;
nuclear@11 68
nuclear@16 69 #ifndef DBG_SYNC
nuclear@12 70 resman_lookup(texman, node->fname, node);
nuclear@16 71 #else
nuclear@16 72 if(!(pixels = img_load_pixels(node->fname, &xsz, &ysz, IMG_FMT_RGBA32))) {
nuclear@1 73 free(node->fname);
nuclear@1 74 free(node);
nuclear@1 75 continue;
nuclear@1 76 }
nuclear@1 77
nuclear@1 78 printf("loaded image: %s\n", node->fname);
nuclear@1 79
nuclear@1 80 glGenTextures(1, &node->tex);
nuclear@1 81 glBindTexture(GL_TEXTURE_2D, node->tex);
nuclear@1 82 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@1 83 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@16 84 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
nuclear@1 85 img_free_pixels(pixels);
nuclear@16 86
nuclear@16 87 node->aspect = (float)xsz / (float)ysz;
nuclear@16 88 #endif
nuclear@1 89
nuclear@13 90 node->next = list->next;
nuclear@13 91 node->prev = list;
nuclear@1 92 }
nuclear@1 93 closedir(dir);
nuclear@1 94
nuclear@1 95 return list;
nuclear@1 96 }
nuclear@1 97
nuclear@1 98 void free_thumbs(struct thumbnail *thumbs)
nuclear@1 99 {
nuclear@1 100 if(!thumbs) return;
nuclear@1 101
nuclear@1 102 while(thumbs) {
nuclear@1 103 struct thumbnail *tmp = thumbs;
nuclear@1 104 thumbs = thumbs->next;
nuclear@1 105
nuclear@1 106 free(tmp->fname);
nuclear@1 107 free(tmp);
nuclear@1 108 }
nuclear@1 109 }
nuclear@1 110
nuclear@1 111
nuclear@11 112 void update_thumbs(void)
nuclear@11 113 {
nuclear@11 114 resman_poll(texman);
nuclear@11 115 }
nuclear@11 116
nuclear@1 117 void draw_thumbs(struct thumbnail *thumbs, float thumb_sz, float start_y)
nuclear@1 118 {
nuclear@1 119 int vp[4];
nuclear@1 120 float gap = thumb_sz / 4.0;
nuclear@1 121 float x = gap;
nuclear@1 122 float y = gap + start_y;
nuclear@1 123 float view_aspect;
nuclear@1 124
nuclear@1 125 glGetIntegerv(GL_VIEWPORT, vp);
nuclear@1 126 view_aspect = (float)(vp[2] - vp[0]) / (vp[3] - vp[1]);
nuclear@1 127
nuclear@1 128 glMatrixMode(GL_PROJECTION);
nuclear@1 129 glPushMatrix();
nuclear@1 130 glLoadIdentity();
nuclear@1 131 glOrtho(0, 1, 1.0 / view_aspect, 0, -1, 1);
nuclear@1 132
nuclear@1 133 glMatrixMode(GL_MODELVIEW);
nuclear@1 134
nuclear@13 135 thumbs = thumbs->next; /* skip dummy node */
nuclear@1 136 while(thumbs) {
nuclear@1 137 glPushMatrix();
nuclear@1 138 glTranslatef(x, y, 0);
nuclear@1 139
nuclear@1 140 glScalef(thumb_sz, thumb_sz, 1);
nuclear@1 141
nuclear@1 142 glBegin(GL_QUADS);
nuclear@1 143 glColor3f(0.25, 0.25, 0.25);
nuclear@1 144 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@1 145 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@1 146 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@1 147 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@1 148 glEnd();
nuclear@1 149
nuclear@12 150 if(thumbs->tex) {
nuclear@12 151 if(thumbs->aspect >= 1.0) {
nuclear@12 152 glTranslatef(0, 0.5 - 0.5 / thumbs->aspect, 0);
nuclear@12 153 glScalef(1, 1.0 / thumbs->aspect, 1);
nuclear@12 154 } else {
nuclear@12 155 glTranslatef(0.5 - thumbs->aspect / 2.0, 0, 0);
nuclear@12 156 glScalef(thumbs->aspect, 1, 1);
nuclear@12 157 }
nuclear@12 158
nuclear@12 159 if(glIsTexture(thumbs->tex)) {
nuclear@12 160 glEnable(GL_TEXTURE_2D);
nuclear@12 161 glBindTexture(GL_TEXTURE_2D, thumbs->tex);
nuclear@12 162
nuclear@12 163 glBegin(GL_QUADS);
nuclear@12 164 glColor3f(1, 1, 1);
nuclear@12 165 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@12 166 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@12 167 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@12 168 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@12 169 glEnd();
nuclear@12 170 } else {
nuclear@12 171 fprintf(stderr, "invalid texture: %u\n", thumbs->tex);
nuclear@12 172 }
nuclear@12 173
nuclear@12 174 glPopMatrix();
nuclear@12 175 glDisable(GL_TEXTURE_2D);
nuclear@1 176 }
nuclear@1 177
nuclear@1 178 thumbs->layout_pos[0] = x;
nuclear@1 179 thumbs->layout_pos[1] = y;
nuclear@1 180 thumbs->layout_size[0] = thumb_sz;
nuclear@1 181 thumbs->layout_size[1] = thumb_sz;
nuclear@1 182
nuclear@1 183 x += thumb_sz + gap;
nuclear@1 184 if(x >= 1.0 - thumb_sz) {
nuclear@1 185 x = gap;
nuclear@1 186 y += thumb_sz + gap;
nuclear@1 187 }
nuclear@1 188
nuclear@1 189 thumbs = thumbs->next;
nuclear@1 190 }
nuclear@1 191
nuclear@1 192 glMatrixMode(GL_PROJECTION);
nuclear@1 193 glPopMatrix();
nuclear@1 194 glMatrixMode(GL_MODELVIEW);
nuclear@1 195 }
nuclear@11 196
nuclear@11 197 static int load_res_texture(const char *fname, int id, void *cls)
nuclear@11 198 {
nuclear@12 199 struct thumbnail *rdata = resman_get_res_data(texman, id);
nuclear@11 200
nuclear@11 201 assert(rdata);
nuclear@11 202 if(!rdata->img) {
nuclear@11 203 if(!(rdata->img = img_create())) {
nuclear@11 204 return -1;
nuclear@11 205 }
nuclear@11 206 }
nuclear@11 207
nuclear@12 208 if(img_load(rdata->img, fname) == -1) {
nuclear@11 209 img_free(rdata->img);
nuclear@13 210 rdata->img = 0;
nuclear@11 211 return -1;
nuclear@11 212 }
nuclear@11 213 rdata->aspect = (float)rdata->img->width / (float)rdata->img->height;
nuclear@11 214
nuclear@11 215 /* set the resource's data to the loaded image, so that we can use
nuclear@11 216 * it in the done callback */
nuclear@12 217 resman_set_res_data(texman, id, rdata);
nuclear@11 218 return 0;
nuclear@11 219 }
nuclear@11 220
nuclear@11 221 static int done_res_texture(int id, void *cls)
nuclear@11 222 {
nuclear@13 223 struct thumbnail *rdata = resman_get_res_data(texman, id);
nuclear@13 224 int load_result = resman_get_res_result(texman, id);
nuclear@11 225
nuclear@13 226 if(load_result == -1) {
nuclear@13 227 /* returning -1 will remove this resource, the free_res_texture
nuclear@13 228 * destroy handler will be called, which will remove the node
nuclear@13 229 * from the list
nuclear@13 230 */
nuclear@13 231 return -1;
nuclear@13 232 }
nuclear@11 233
nuclear@12 234 if(resman_get_res_result(texman, id) != 0 || !rdata) {
nuclear@12 235 fprintf(stderr, "failed to load resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 236 } else {
nuclear@12 237 printf("done loading resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 238 }
nuclear@11 239
nuclear@11 240 if(!rdata->tex) {
nuclear@11 241 glGenTextures(1, &rdata->tex);
nuclear@11 242 }
nuclear@11 243 glBindTexture(GL_TEXTURE_2D, rdata->tex);
nuclear@11 244 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@11 245 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@11 246 glTexImage2D(GL_TEXTURE_2D, 0, img_glintfmt(rdata->img),
nuclear@11 247 rdata->img->width, rdata->img->height, 0, img_glfmt(rdata->img),
nuclear@11 248 img_gltype(rdata->img), rdata->img->pixels);
nuclear@11 249 return 0;
nuclear@11 250 }
nuclear@11 251
nuclear@11 252 static void free_res_texture(int id, void *cls)
nuclear@11 253 {
nuclear@13 254 struct thumbnail *thumb = resman_get_res_data(texman, id);
nuclear@11 255
nuclear@13 256 if(thumb) {
nuclear@13 257 if(thumb->tex) {
nuclear@13 258 glDeleteTextures(1, &thumb->tex);
nuclear@11 259 }
nuclear@13 260 if(thumb->img) {
nuclear@13 261 img_free(thumb->img);
nuclear@11 262 }
nuclear@11 263 }
nuclear@13 264
nuclear@13 265 /* remove from the list */
nuclear@13 266 if(thumb->prev) {
nuclear@13 267 thumb->prev->next = thumb->next;
nuclear@13 268 }
nuclear@13 269 if(thumb->next) {
nuclear@13 270 thumb->next->prev = thumb->prev;
nuclear@13 271 }
nuclear@13 272 free(thumb);
nuclear@11 273 }