libresman

annotate examples/imgthumbs/src/thumbs.c @ 14:2fcd1fbb0d18

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buggy piece of shit
author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 10 Feb 2014 12:11:02 +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@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@14 17 struct thumbnail *dbg;
nuclear@11 18
nuclear@11 19 static int load_res_texture(const char *fname, int id, void *cls);
nuclear@11 20 static int done_res_texture(int id, void *cls);
nuclear@11 21 static void free_res_texture(int id, void *cls);
nuclear@11 22
nuclear@11 23
nuclear@1 24 struct thumbnail *create_thumbs(const char *dirpath)
nuclear@1 25 {
nuclear@1 26 DIR *dir;
nuclear@1 27 struct dirent *dent;
nuclear@13 28 /* allocate dummy head node */
nuclear@13 29 struct thumbnail *list = calloc(1, sizeof *list);
nuclear@14 30 dbg = list;
nuclear@1 31
nuclear@11 32 /*unsigned int intfmt = GL_COMPRESSED_RGB;
nuclear@11 33 if(!strstr((char*)glGetString(GL_EXTENSIONS), "GL_ARB_texture_compression")) {
nuclear@2 34 printf("warning, no texture compression available.\n");
nuclear@2 35 intfmt = GL_RGB;
nuclear@11 36 }*/
nuclear@11 37
nuclear@11 38 if(!texman) {
nuclear@11 39 texman = resman_create();
nuclear@11 40 resman_set_load_func(texman, load_res_texture, 0);
nuclear@11 41 resman_set_done_func(texman, done_res_texture, 0);
nuclear@11 42 resman_set_destroy_func(texman, free_res_texture, 0);
nuclear@2 43 }
nuclear@2 44
nuclear@1 45 if(!(dir = opendir(dirpath))) {
nuclear@1 46 fprintf(stderr, "failed to open directory: %s: %s\n", dirpath, strerror(errno));
nuclear@1 47 return 0;
nuclear@1 48 }
nuclear@1 49
nuclear@1 50 while((dent = readdir(dir))) {
nuclear@11 51 /*int xsz, ysz;
nuclear@11 52 unsigned char *pixels;*/
nuclear@1 53 struct thumbnail *node;
nuclear@1 54
nuclear@1 55 if(!(node = malloc(sizeof *node))) {
nuclear@1 56 perror("failed to allocate thumbnail list node");
nuclear@1 57 continue;
nuclear@1 58 }
nuclear@11 59 memset(node, 0, sizeof *node);
nuclear@1 60
nuclear@1 61 if(!(node->fname = malloc(strlen(dirpath) + strlen(dent->d_name) + 2))) {
nuclear@1 62 free(node);
nuclear@1 63 continue;
nuclear@1 64 }
nuclear@1 65 strcpy(node->fname, dirpath);
nuclear@1 66 if(dirpath[strlen(dirpath) - 1] != '/') {
nuclear@1 67 strcat(node->fname, "/");
nuclear@1 68 }
nuclear@1 69 strcat(node->fname, dent->d_name);
nuclear@1 70
nuclear@11 71 node->aspect = 1.0;/*(float)xsz / (float)ysz;*/
nuclear@11 72
nuclear@12 73 resman_lookup(texman, node->fname, node);
nuclear@11 74
nuclear@11 75 /*if(!(pixels = img_load_pixels(node->fname, &xsz, &ysz, IMG_FMT_RGBA32))) {
nuclear@1 76 free(node->fname);
nuclear@1 77 free(node);
nuclear@1 78 continue;
nuclear@1 79 }
nuclear@1 80
nuclear@1 81 printf("loaded image: %s\n", node->fname);
nuclear@1 82
nuclear@1 83 glGenTextures(1, &node->tex);
nuclear@1 84 glBindTexture(GL_TEXTURE_2D, node->tex);
nuclear@1 85 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@1 86 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@2 87 glTexImage2D(GL_TEXTURE_2D, 0, intfmt, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
nuclear@1 88 img_free_pixels(pixels);
nuclear@11 89 */
nuclear@1 90
nuclear@13 91 node->next = list->next;
nuclear@13 92 node->prev = list;
nuclear@14 93 list->next = node;
nuclear@1 94 }
nuclear@1 95 closedir(dir);
nuclear@1 96
nuclear@1 97 return list;
nuclear@1 98 }
nuclear@1 99
nuclear@1 100 void free_thumbs(struct thumbnail *thumbs)
nuclear@1 101 {
nuclear@1 102 if(!thumbs) return;
nuclear@1 103
nuclear@1 104 while(thumbs) {
nuclear@1 105 struct thumbnail *tmp = thumbs;
nuclear@1 106 thumbs = thumbs->next;
nuclear@1 107
nuclear@1 108 free(tmp->fname);
nuclear@1 109 free(tmp);
nuclear@1 110 }
nuclear@1 111 }
nuclear@1 112
nuclear@1 113
nuclear@11 114 void update_thumbs(void)
nuclear@11 115 {
nuclear@11 116 resman_poll(texman);
nuclear@11 117 }
nuclear@11 118
nuclear@1 119 void draw_thumbs(struct thumbnail *thumbs, float thumb_sz, float start_y)
nuclear@1 120 {
nuclear@1 121 int vp[4];
nuclear@1 122 float gap = thumb_sz / 4.0;
nuclear@1 123 float x = gap;
nuclear@1 124 float y = gap + start_y;
nuclear@1 125 float view_aspect;
nuclear@1 126
nuclear@1 127 glGetIntegerv(GL_VIEWPORT, vp);
nuclear@14 128 view_aspect = (float)(vp[2] - vp[0]) / (float)(vp[3] - vp[1]);
nuclear@1 129
nuclear@1 130 glMatrixMode(GL_PROJECTION);
nuclear@1 131 glPushMatrix();
nuclear@1 132 glLoadIdentity();
nuclear@1 133 glOrtho(0, 1, 1.0 / view_aspect, 0, -1, 1);
nuclear@1 134
nuclear@1 135 glMatrixMode(GL_MODELVIEW);
nuclear@1 136
nuclear@13 137 thumbs = thumbs->next; /* skip dummy node */
nuclear@1 138 while(thumbs) {
nuclear@14 139 printf("drawing thumb: %s\n", thumbs->fname);
nuclear@1 140 glPushMatrix();
nuclear@1 141 glTranslatef(x, y, 0);
nuclear@1 142
nuclear@1 143 glScalef(thumb_sz, thumb_sz, 1);
nuclear@1 144
nuclear@1 145 glBegin(GL_QUADS);
nuclear@1 146 glColor3f(0.25, 0.25, 0.25);
nuclear@1 147 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@1 148 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@1 149 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@1 150 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@1 151 glEnd();
nuclear@1 152
nuclear@12 153 if(thumbs->tex) {
nuclear@12 154 if(thumbs->aspect >= 1.0) {
nuclear@12 155 glTranslatef(0, 0.5 - 0.5 / thumbs->aspect, 0);
nuclear@12 156 glScalef(1, 1.0 / thumbs->aspect, 1);
nuclear@12 157 } else {
nuclear@12 158 glTranslatef(0.5 - thumbs->aspect / 2.0, 0, 0);
nuclear@12 159 glScalef(thumbs->aspect, 1, 1);
nuclear@12 160 }
nuclear@12 161
nuclear@12 162 if(glIsTexture(thumbs->tex)) {
nuclear@12 163 glEnable(GL_TEXTURE_2D);
nuclear@12 164 glBindTexture(GL_TEXTURE_2D, thumbs->tex);
nuclear@12 165
nuclear@12 166 glBegin(GL_QUADS);
nuclear@12 167 glColor3f(1, 1, 1);
nuclear@12 168 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@12 169 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@12 170 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@12 171 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@12 172 glEnd();
nuclear@12 173 } else {
nuclear@12 174 fprintf(stderr, "invalid texture: %u\n", thumbs->tex);
nuclear@12 175 }
nuclear@12 176
nuclear@12 177 glPopMatrix();
nuclear@12 178 glDisable(GL_TEXTURE_2D);
nuclear@1 179 }
nuclear@1 180
nuclear@1 181 thumbs->layout_pos[0] = x;
nuclear@1 182 thumbs->layout_pos[1] = y;
nuclear@1 183 thumbs->layout_size[0] = thumb_sz;
nuclear@1 184 thumbs->layout_size[1] = thumb_sz;
nuclear@1 185
nuclear@1 186 x += thumb_sz + gap;
nuclear@1 187 if(x >= 1.0 - thumb_sz) {
nuclear@1 188 x = gap;
nuclear@1 189 y += thumb_sz + gap;
nuclear@1 190 }
nuclear@1 191
nuclear@1 192 thumbs = thumbs->next;
nuclear@1 193 }
nuclear@1 194
nuclear@1 195 glMatrixMode(GL_PROJECTION);
nuclear@1 196 glPopMatrix();
nuclear@1 197 glMatrixMode(GL_MODELVIEW);
nuclear@1 198 }
nuclear@11 199
nuclear@11 200 static int load_res_texture(const char *fname, int id, void *cls)
nuclear@11 201 {
nuclear@12 202 struct thumbnail *rdata = resman_get_res_data(texman, id);
nuclear@11 203
nuclear@11 204 assert(rdata);
nuclear@11 205 if(!rdata->img) {
nuclear@11 206 if(!(rdata->img = img_create())) {
nuclear@11 207 return -1;
nuclear@11 208 }
nuclear@11 209 }
nuclear@11 210
nuclear@12 211 if(img_load(rdata->img, fname) == -1) {
nuclear@11 212 img_free(rdata->img);
nuclear@13 213 rdata->img = 0;
nuclear@11 214 return -1;
nuclear@11 215 }
nuclear@11 216 rdata->aspect = (float)rdata->img->width / (float)rdata->img->height;
nuclear@11 217
nuclear@11 218 /* set the resource's data to the loaded image, so that we can use
nuclear@11 219 * it in the done callback */
nuclear@12 220 resman_set_res_data(texman, id, rdata);
nuclear@11 221 return 0;
nuclear@11 222 }
nuclear@11 223
nuclear@11 224 static int done_res_texture(int id, void *cls)
nuclear@11 225 {
nuclear@13 226 struct thumbnail *rdata = resman_get_res_data(texman, id);
nuclear@13 227 int load_result = resman_get_res_result(texman, id);
nuclear@11 228
nuclear@13 229 if(load_result == -1) {
nuclear@13 230 /* returning -1 will remove this resource, the free_res_texture
nuclear@13 231 * destroy handler will be called, which will remove the node
nuclear@13 232 * from the list
nuclear@13 233 */
nuclear@13 234 return -1;
nuclear@13 235 }
nuclear@11 236
nuclear@12 237 if(resman_get_res_result(texman, id) != 0 || !rdata) {
nuclear@12 238 fprintf(stderr, "failed to load resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 239 } else {
nuclear@12 240 printf("done loading resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 241 }
nuclear@11 242
nuclear@11 243 if(!rdata->tex) {
nuclear@11 244 glGenTextures(1, &rdata->tex);
nuclear@11 245 }
nuclear@11 246 glBindTexture(GL_TEXTURE_2D, rdata->tex);
nuclear@11 247 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@11 248 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@11 249 glTexImage2D(GL_TEXTURE_2D, 0, img_glintfmt(rdata->img),
nuclear@11 250 rdata->img->width, rdata->img->height, 0, img_glfmt(rdata->img),
nuclear@11 251 img_gltype(rdata->img), rdata->img->pixels);
nuclear@11 252 return 0;
nuclear@11 253 }
nuclear@11 254
nuclear@11 255 static void free_res_texture(int id, void *cls)
nuclear@11 256 {
nuclear@13 257 struct thumbnail *thumb = resman_get_res_data(texman, id);
nuclear@11 258
nuclear@14 259 printf("deleting thumb %d: %s\n", id, thumb->fname);
nuclear@14 260
nuclear@13 261 if(thumb) {
nuclear@13 262 if(thumb->tex) {
nuclear@13 263 glDeleteTextures(1, &thumb->tex);
nuclear@11 264 }
nuclear@13 265 if(thumb->img) {
nuclear@13 266 img_free(thumb->img);
nuclear@11 267 }
nuclear@11 268 }
nuclear@13 269
nuclear@13 270 /* remove from the list */
nuclear@13 271 if(thumb->prev) {
nuclear@13 272 thumb->prev->next = thumb->next;
nuclear@13 273 }
nuclear@13 274 if(thumb->next) {
nuclear@13 275 thumb->next->prev = thumb->prev;
nuclear@13 276 }
nuclear@13 277 free(thumb);
nuclear@11 278 }