libresman

annotate examples/imgthumbs/src/thumbs.c @ 13:a42888d26839

find changesets by author, revision, files, or words in the commit message
bit more progress...
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 08 Feb 2014 07:41:39 +0200
parents 84f55eab27cb
children 2fcd1fbb0d18 0a789208498d
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@6 12 #ifndef GL_COMPRESSED_RGB
nuclear@6 13 #define GL_COMPRESSED_RGB 0x84ed
nuclear@6 14 #endif
nuclear@6 15
nuclear@11 16 struct resman *texman;
nuclear@11 17
nuclear@11 18 static int load_res_texture(const char *fname, int id, void *cls);
nuclear@11 19 static int done_res_texture(int id, void *cls);
nuclear@11 20 static void free_res_texture(int id, void *cls);
nuclear@11 21
nuclear@11 22
nuclear@1 23 struct thumbnail *create_thumbs(const char *dirpath)
nuclear@1 24 {
nuclear@1 25 DIR *dir;
nuclear@1 26 struct dirent *dent;
nuclear@13 27 /* allocate dummy head node */
nuclear@13 28 struct thumbnail *list = calloc(1, sizeof *list);
nuclear@1 29
nuclear@11 30 /*unsigned int intfmt = GL_COMPRESSED_RGB;
nuclear@11 31 if(!strstr((char*)glGetString(GL_EXTENSIONS), "GL_ARB_texture_compression")) {
nuclear@2 32 printf("warning, no texture compression available.\n");
nuclear@2 33 intfmt = GL_RGB;
nuclear@11 34 }*/
nuclear@11 35
nuclear@11 36 if(!texman) {
nuclear@11 37 texman = resman_create();
nuclear@11 38 resman_set_load_func(texman, load_res_texture, 0);
nuclear@11 39 resman_set_done_func(texman, done_res_texture, 0);
nuclear@11 40 resman_set_destroy_func(texman, free_res_texture, 0);
nuclear@2 41 }
nuclear@2 42
nuclear@1 43 if(!(dir = opendir(dirpath))) {
nuclear@1 44 fprintf(stderr, "failed to open directory: %s: %s\n", dirpath, strerror(errno));
nuclear@1 45 return 0;
nuclear@1 46 }
nuclear@1 47
nuclear@1 48 while((dent = readdir(dir))) {
nuclear@11 49 /*int xsz, ysz;
nuclear@11 50 unsigned char *pixels;*/
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@11 69 node->aspect = 1.0;/*(float)xsz / (float)ysz;*/
nuclear@11 70
nuclear@12 71 resman_lookup(texman, node->fname, node);
nuclear@11 72
nuclear@11 73 /*if(!(pixels = img_load_pixels(node->fname, &xsz, &ysz, IMG_FMT_RGBA32))) {
nuclear@1 74 free(node->fname);
nuclear@1 75 free(node);
nuclear@1 76 continue;
nuclear@1 77 }
nuclear@1 78
nuclear@1 79 printf("loaded image: %s\n", node->fname);
nuclear@1 80
nuclear@1 81 glGenTextures(1, &node->tex);
nuclear@1 82 glBindTexture(GL_TEXTURE_2D, node->tex);
nuclear@1 83 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@1 84 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@2 85 glTexImage2D(GL_TEXTURE_2D, 0, intfmt, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
nuclear@1 86 img_free_pixels(pixels);
nuclear@11 87 */
nuclear@1 88
nuclear@13 89 node->next = list->next;
nuclear@13 90 node->prev = list;
nuclear@1 91 }
nuclear@1 92 closedir(dir);
nuclear@1 93
nuclear@1 94 return list;
nuclear@1 95 }
nuclear@1 96
nuclear@1 97 void free_thumbs(struct thumbnail *thumbs)
nuclear@1 98 {
nuclear@1 99 if(!thumbs) return;
nuclear@1 100
nuclear@1 101 while(thumbs) {
nuclear@1 102 struct thumbnail *tmp = thumbs;
nuclear@1 103 thumbs = thumbs->next;
nuclear@1 104
nuclear@1 105 free(tmp->fname);
nuclear@1 106 free(tmp);
nuclear@1 107 }
nuclear@1 108 }
nuclear@1 109
nuclear@1 110
nuclear@11 111 void update_thumbs(void)
nuclear@11 112 {
nuclear@11 113 resman_poll(texman);
nuclear@11 114 }
nuclear@11 115
nuclear@1 116 void draw_thumbs(struct thumbnail *thumbs, float thumb_sz, float start_y)
nuclear@1 117 {
nuclear@1 118 int vp[4];
nuclear@1 119 float gap = thumb_sz / 4.0;
nuclear@1 120 float x = gap;
nuclear@1 121 float y = gap + start_y;
nuclear@1 122 float view_aspect;
nuclear@1 123
nuclear@1 124 glGetIntegerv(GL_VIEWPORT, vp);
nuclear@1 125 view_aspect = (float)(vp[2] - vp[0]) / (vp[3] - vp[1]);
nuclear@1 126
nuclear@1 127 glMatrixMode(GL_PROJECTION);
nuclear@1 128 glPushMatrix();
nuclear@1 129 glLoadIdentity();
nuclear@1 130 glOrtho(0, 1, 1.0 / view_aspect, 0, -1, 1);
nuclear@1 131
nuclear@1 132 glMatrixMode(GL_MODELVIEW);
nuclear@1 133
nuclear@13 134 thumbs = thumbs->next; /* skip dummy node */
nuclear@1 135 while(thumbs) {
nuclear@1 136 glPushMatrix();
nuclear@1 137 glTranslatef(x, y, 0);
nuclear@1 138
nuclear@1 139 glScalef(thumb_sz, thumb_sz, 1);
nuclear@1 140
nuclear@1 141 glBegin(GL_QUADS);
nuclear@1 142 glColor3f(0.25, 0.25, 0.25);
nuclear@1 143 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@1 144 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@1 145 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@1 146 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@1 147 glEnd();
nuclear@1 148
nuclear@12 149 if(thumbs->tex) {
nuclear@12 150 if(thumbs->aspect >= 1.0) {
nuclear@12 151 glTranslatef(0, 0.5 - 0.5 / thumbs->aspect, 0);
nuclear@12 152 glScalef(1, 1.0 / thumbs->aspect, 1);
nuclear@12 153 } else {
nuclear@12 154 glTranslatef(0.5 - thumbs->aspect / 2.0, 0, 0);
nuclear@12 155 glScalef(thumbs->aspect, 1, 1);
nuclear@12 156 }
nuclear@12 157
nuclear@12 158 if(glIsTexture(thumbs->tex)) {
nuclear@12 159 glEnable(GL_TEXTURE_2D);
nuclear@12 160 glBindTexture(GL_TEXTURE_2D, thumbs->tex);
nuclear@12 161
nuclear@12 162 glBegin(GL_QUADS);
nuclear@12 163 glColor3f(1, 1, 1);
nuclear@12 164 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@12 165 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@12 166 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@12 167 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@12 168 glEnd();
nuclear@12 169 } else {
nuclear@12 170 fprintf(stderr, "invalid texture: %u\n", thumbs->tex);
nuclear@12 171 }
nuclear@12 172
nuclear@12 173 glPopMatrix();
nuclear@12 174 glDisable(GL_TEXTURE_2D);
nuclear@1 175 }
nuclear@1 176
nuclear@1 177 thumbs->layout_pos[0] = x;
nuclear@1 178 thumbs->layout_pos[1] = y;
nuclear@1 179 thumbs->layout_size[0] = thumb_sz;
nuclear@1 180 thumbs->layout_size[1] = thumb_sz;
nuclear@1 181
nuclear@1 182 x += thumb_sz + gap;
nuclear@1 183 if(x >= 1.0 - thumb_sz) {
nuclear@1 184 x = gap;
nuclear@1 185 y += thumb_sz + gap;
nuclear@1 186 }
nuclear@1 187
nuclear@1 188 thumbs = thumbs->next;
nuclear@1 189 }
nuclear@1 190
nuclear@1 191 glMatrixMode(GL_PROJECTION);
nuclear@1 192 glPopMatrix();
nuclear@1 193 glMatrixMode(GL_MODELVIEW);
nuclear@1 194 }
nuclear@11 195
nuclear@11 196 static int load_res_texture(const char *fname, int id, void *cls)
nuclear@11 197 {
nuclear@12 198 struct thumbnail *rdata = resman_get_res_data(texman, id);
nuclear@11 199
nuclear@11 200 assert(rdata);
nuclear@11 201 if(!rdata->img) {
nuclear@11 202 if(!(rdata->img = img_create())) {
nuclear@11 203 return -1;
nuclear@11 204 }
nuclear@11 205 }
nuclear@11 206
nuclear@12 207 if(img_load(rdata->img, fname) == -1) {
nuclear@11 208 img_free(rdata->img);
nuclear@13 209 rdata->img = 0;
nuclear@11 210 return -1;
nuclear@11 211 }
nuclear@11 212 rdata->aspect = (float)rdata->img->width / (float)rdata->img->height;
nuclear@11 213
nuclear@11 214 /* set the resource's data to the loaded image, so that we can use
nuclear@11 215 * it in the done callback */
nuclear@12 216 resman_set_res_data(texman, id, rdata);
nuclear@11 217 return 0;
nuclear@11 218 }
nuclear@11 219
nuclear@11 220 static int done_res_texture(int id, void *cls)
nuclear@11 221 {
nuclear@13 222 struct thumbnail *rdata = resman_get_res_data(texman, id);
nuclear@13 223 int load_result = resman_get_res_result(texman, id);
nuclear@11 224
nuclear@13 225 if(load_result == -1) {
nuclear@13 226 /* returning -1 will remove this resource, the free_res_texture
nuclear@13 227 * destroy handler will be called, which will remove the node
nuclear@13 228 * from the list
nuclear@13 229 */
nuclear@13 230 return -1;
nuclear@13 231 }
nuclear@11 232
nuclear@12 233 if(resman_get_res_result(texman, id) != 0 || !rdata) {
nuclear@12 234 fprintf(stderr, "failed to load resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 235 } else {
nuclear@12 236 printf("done loading resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 237 }
nuclear@11 238
nuclear@11 239 if(!rdata->tex) {
nuclear@11 240 glGenTextures(1, &rdata->tex);
nuclear@11 241 }
nuclear@11 242 glBindTexture(GL_TEXTURE_2D, rdata->tex);
nuclear@11 243 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@11 244 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@11 245 glTexImage2D(GL_TEXTURE_2D, 0, img_glintfmt(rdata->img),
nuclear@11 246 rdata->img->width, rdata->img->height, 0, img_glfmt(rdata->img),
nuclear@11 247 img_gltype(rdata->img), rdata->img->pixels);
nuclear@11 248 return 0;
nuclear@11 249 }
nuclear@11 250
nuclear@11 251 static void free_res_texture(int id, void *cls)
nuclear@11 252 {
nuclear@13 253 struct thumbnail *thumb = resman_get_res_data(texman, id);
nuclear@11 254
nuclear@13 255 if(thumb) {
nuclear@13 256 if(thumb->tex) {
nuclear@13 257 glDeleteTextures(1, &thumb->tex);
nuclear@11 258 }
nuclear@13 259 if(thumb->img) {
nuclear@13 260 img_free(thumb->img);
nuclear@11 261 }
nuclear@11 262 }
nuclear@13 263
nuclear@13 264 /* remove from the list */
nuclear@13 265 if(thumb->prev) {
nuclear@13 266 thumb->prev->next = thumb->next;
nuclear@13 267 }
nuclear@13 268 if(thumb->next) {
nuclear@13 269 thumb->next->prev = thumb->prev;
nuclear@13 270 }
nuclear@13 271 free(thumb);
nuclear@11 272 }