libresman

annotate examples/imgthumbs/src/thumbs.c @ 17:43a9fe4a80ee

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merged
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 11 Feb 2014 18:48:24 +0200
parents 0a789208498d 2fcd1fbb0d18
children 711698580eb0
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@14 19 struct thumbnail *dbg;
nuclear@11 20
nuclear@11 21 static int load_res_texture(const char *fname, int id, void *cls);
nuclear@11 22 static int done_res_texture(int id, void *cls);
nuclear@11 23 static void free_res_texture(int id, void *cls);
nuclear@11 24
nuclear@11 25
nuclear@1 26 struct thumbnail *create_thumbs(const char *dirpath)
nuclear@1 27 {
nuclear@1 28 DIR *dir;
nuclear@1 29 struct dirent *dent;
nuclear@13 30 /* allocate dummy head node */
nuclear@13 31 struct thumbnail *list = calloc(1, sizeof *list);
nuclear@14 32 dbg = list;
nuclear@1 33
nuclear@11 34 if(!texman) {
nuclear@11 35 texman = resman_create();
nuclear@11 36 resman_set_load_func(texman, load_res_texture, 0);
nuclear@11 37 resman_set_done_func(texman, done_res_texture, 0);
nuclear@11 38 resman_set_destroy_func(texman, free_res_texture, 0);
nuclear@2 39 }
nuclear@2 40
nuclear@1 41 if(!(dir = opendir(dirpath))) {
nuclear@1 42 fprintf(stderr, "failed to open directory: %s: %s\n", dirpath, strerror(errno));
nuclear@1 43 return 0;
nuclear@1 44 }
nuclear@1 45
nuclear@1 46 while((dent = readdir(dir))) {
nuclear@16 47 #ifdef DBG_SYNC
nuclear@16 48 int xsz, ysz;
nuclear@16 49 unsigned char *pixels;
nuclear@16 50 #endif
nuclear@1 51 struct thumbnail *node;
nuclear@1 52
nuclear@1 53 if(!(node = malloc(sizeof *node))) {
nuclear@1 54 perror("failed to allocate thumbnail list node");
nuclear@1 55 continue;
nuclear@1 56 }
nuclear@11 57 memset(node, 0, sizeof *node);
nuclear@1 58
nuclear@1 59 if(!(node->fname = malloc(strlen(dirpath) + strlen(dent->d_name) + 2))) {
nuclear@1 60 free(node);
nuclear@1 61 continue;
nuclear@1 62 }
nuclear@1 63 strcpy(node->fname, dirpath);
nuclear@1 64 if(dirpath[strlen(dirpath) - 1] != '/') {
nuclear@1 65 strcat(node->fname, "/");
nuclear@1 66 }
nuclear@1 67 strcat(node->fname, dent->d_name);
nuclear@1 68
nuclear@16 69 node->aspect = 1.0;
nuclear@11 70
nuclear@16 71 #ifndef DBG_SYNC
nuclear@12 72 resman_lookup(texman, node->fname, node);
nuclear@16 73 #else
nuclear@16 74 if(!(pixels = img_load_pixels(node->fname, &xsz, &ysz, IMG_FMT_RGBA32))) {
nuclear@1 75 free(node->fname);
nuclear@1 76 free(node);
nuclear@1 77 continue;
nuclear@1 78 }
nuclear@1 79
nuclear@1 80 printf("loaded image: %s\n", node->fname);
nuclear@1 81
nuclear@1 82 glGenTextures(1, &node->tex);
nuclear@1 83 glBindTexture(GL_TEXTURE_2D, node->tex);
nuclear@1 84 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@1 85 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@16 86 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
nuclear@1 87 img_free_pixels(pixels);
nuclear@16 88
nuclear@16 89 node->aspect = (float)xsz / (float)ysz;
nuclear@16 90 #endif
nuclear@1 91
nuclear@13 92 node->next = list->next;
nuclear@13 93 node->prev = list;
nuclear@14 94 list->next = node;
nuclear@1 95 }
nuclear@1 96 closedir(dir);
nuclear@1 97
nuclear@1 98 return list;
nuclear@1 99 }
nuclear@1 100
nuclear@1 101 void free_thumbs(struct thumbnail *thumbs)
nuclear@1 102 {
nuclear@1 103 if(!thumbs) return;
nuclear@1 104
nuclear@1 105 while(thumbs) {
nuclear@1 106 struct thumbnail *tmp = thumbs;
nuclear@1 107 thumbs = thumbs->next;
nuclear@1 108
nuclear@1 109 free(tmp->fname);
nuclear@1 110 free(tmp);
nuclear@1 111 }
nuclear@1 112 }
nuclear@1 113
nuclear@1 114
nuclear@11 115 void update_thumbs(void)
nuclear@11 116 {
nuclear@11 117 resman_poll(texman);
nuclear@11 118 }
nuclear@11 119
nuclear@1 120 void draw_thumbs(struct thumbnail *thumbs, float thumb_sz, float start_y)
nuclear@1 121 {
nuclear@1 122 int vp[4];
nuclear@1 123 float gap = thumb_sz / 4.0;
nuclear@1 124 float x = gap;
nuclear@1 125 float y = gap + start_y;
nuclear@1 126 float view_aspect;
nuclear@1 127
nuclear@1 128 glGetIntegerv(GL_VIEWPORT, vp);
nuclear@14 129 view_aspect = (float)(vp[2] - vp[0]) / (float)(vp[3] - vp[1]);
nuclear@1 130
nuclear@1 131 glMatrixMode(GL_PROJECTION);
nuclear@1 132 glPushMatrix();
nuclear@1 133 glLoadIdentity();
nuclear@1 134 glOrtho(0, 1, 1.0 / view_aspect, 0, -1, 1);
nuclear@1 135
nuclear@1 136 glMatrixMode(GL_MODELVIEW);
nuclear@1 137
nuclear@13 138 thumbs = thumbs->next; /* skip dummy node */
nuclear@1 139 while(thumbs) {
nuclear@14 140 printf("drawing thumb: %s\n", thumbs->fname);
nuclear@1 141 glPushMatrix();
nuclear@1 142 glTranslatef(x, y, 0);
nuclear@1 143
nuclear@1 144 glScalef(thumb_sz, thumb_sz, 1);
nuclear@1 145
nuclear@1 146 glBegin(GL_QUADS);
nuclear@1 147 glColor3f(0.25, 0.25, 0.25);
nuclear@1 148 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@1 149 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@1 150 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@1 151 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@1 152 glEnd();
nuclear@1 153
nuclear@12 154 if(thumbs->tex) {
nuclear@12 155 if(thumbs->aspect >= 1.0) {
nuclear@12 156 glTranslatef(0, 0.5 - 0.5 / thumbs->aspect, 0);
nuclear@12 157 glScalef(1, 1.0 / thumbs->aspect, 1);
nuclear@12 158 } else {
nuclear@12 159 glTranslatef(0.5 - thumbs->aspect / 2.0, 0, 0);
nuclear@12 160 glScalef(thumbs->aspect, 1, 1);
nuclear@12 161 }
nuclear@12 162
nuclear@12 163 if(glIsTexture(thumbs->tex)) {
nuclear@12 164 glEnable(GL_TEXTURE_2D);
nuclear@12 165 glBindTexture(GL_TEXTURE_2D, thumbs->tex);
nuclear@12 166
nuclear@12 167 glBegin(GL_QUADS);
nuclear@12 168 glColor3f(1, 1, 1);
nuclear@12 169 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@12 170 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@12 171 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@12 172 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@12 173 glEnd();
nuclear@12 174 } else {
nuclear@12 175 fprintf(stderr, "invalid texture: %u\n", thumbs->tex);
nuclear@12 176 }
nuclear@12 177
nuclear@12 178 glPopMatrix();
nuclear@12 179 glDisable(GL_TEXTURE_2D);
nuclear@1 180 }
nuclear@1 181
nuclear@1 182 thumbs->layout_pos[0] = x;
nuclear@1 183 thumbs->layout_pos[1] = y;
nuclear@1 184 thumbs->layout_size[0] = thumb_sz;
nuclear@1 185 thumbs->layout_size[1] = thumb_sz;
nuclear@1 186
nuclear@1 187 x += thumb_sz + gap;
nuclear@1 188 if(x >= 1.0 - thumb_sz) {
nuclear@1 189 x = gap;
nuclear@1 190 y += thumb_sz + gap;
nuclear@1 191 }
nuclear@1 192
nuclear@1 193 thumbs = thumbs->next;
nuclear@1 194 }
nuclear@1 195
nuclear@1 196 glMatrixMode(GL_PROJECTION);
nuclear@1 197 glPopMatrix();
nuclear@1 198 glMatrixMode(GL_MODELVIEW);
nuclear@1 199 }
nuclear@11 200
nuclear@11 201 static int load_res_texture(const char *fname, int id, void *cls)
nuclear@11 202 {
nuclear@12 203 struct thumbnail *rdata = resman_get_res_data(texman, id);
nuclear@11 204
nuclear@11 205 assert(rdata);
nuclear@11 206 if(!rdata->img) {
nuclear@11 207 if(!(rdata->img = img_create())) {
nuclear@11 208 return -1;
nuclear@11 209 }
nuclear@11 210 }
nuclear@11 211
nuclear@12 212 if(img_load(rdata->img, fname) == -1) {
nuclear@11 213 img_free(rdata->img);
nuclear@13 214 rdata->img = 0;
nuclear@11 215 return -1;
nuclear@11 216 }
nuclear@11 217 rdata->aspect = (float)rdata->img->width / (float)rdata->img->height;
nuclear@11 218
nuclear@11 219 /* set the resource's data to the loaded image, so that we can use
nuclear@11 220 * it in the done callback */
nuclear@12 221 resman_set_res_data(texman, id, rdata);
nuclear@11 222 return 0;
nuclear@11 223 }
nuclear@11 224
nuclear@11 225 static int done_res_texture(int id, void *cls)
nuclear@11 226 {
nuclear@13 227 struct thumbnail *rdata = resman_get_res_data(texman, id);
nuclear@13 228 int load_result = resman_get_res_result(texman, id);
nuclear@11 229
nuclear@13 230 if(load_result == -1) {
nuclear@13 231 /* returning -1 will remove this resource, the free_res_texture
nuclear@13 232 * destroy handler will be called, which will remove the node
nuclear@13 233 * from the list
nuclear@13 234 */
nuclear@13 235 return -1;
nuclear@13 236 }
nuclear@11 237
nuclear@12 238 if(resman_get_res_result(texman, id) != 0 || !rdata) {
nuclear@12 239 fprintf(stderr, "failed to load resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 240 } else {
nuclear@12 241 printf("done loading resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 242 }
nuclear@11 243
nuclear@11 244 if(!rdata->tex) {
nuclear@11 245 glGenTextures(1, &rdata->tex);
nuclear@11 246 }
nuclear@11 247 glBindTexture(GL_TEXTURE_2D, rdata->tex);
nuclear@11 248 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@11 249 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@11 250 glTexImage2D(GL_TEXTURE_2D, 0, img_glintfmt(rdata->img),
nuclear@11 251 rdata->img->width, rdata->img->height, 0, img_glfmt(rdata->img),
nuclear@11 252 img_gltype(rdata->img), rdata->img->pixels);
nuclear@11 253 return 0;
nuclear@11 254 }
nuclear@11 255
nuclear@11 256 static void free_res_texture(int id, void *cls)
nuclear@11 257 {
nuclear@13 258 struct thumbnail *thumb = resman_get_res_data(texman, id);
nuclear@11 259
nuclear@14 260 printf("deleting thumb %d: %s\n", id, thumb->fname);
nuclear@14 261
nuclear@13 262 if(thumb) {
nuclear@13 263 if(thumb->tex) {
nuclear@13 264 glDeleteTextures(1, &thumb->tex);
nuclear@11 265 }
nuclear@13 266 if(thumb->img) {
nuclear@13 267 img_free(thumb->img);
nuclear@11 268 }
nuclear@11 269 }
nuclear@13 270
nuclear@13 271 /* remove from the list */
nuclear@13 272 if(thumb->prev) {
nuclear@13 273 thumb->prev->next = thumb->next;
nuclear@13 274 }
nuclear@13 275 if(thumb->next) {
nuclear@13 276 thumb->next->prev = thumb->prev;
nuclear@13 277 }
nuclear@13 278 free(thumb);
nuclear@11 279 }