1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/examples/imgthumbs/src/thumbs.c	Fri Jan 31 03:17:24 2014 +0200
     1.3 @@ -0,0 +1,152 @@
     1.4 +#include <stdio.h>
     1.5 +#include <stdlib.h>
     1.6 +#include <string.h>
     1.7 +#include <errno.h>
     1.8 +#include <dirent.h>
     1.9 +#include <imago2.h>
    1.10 +#include "opengl.h"
    1.11 +#include "thumbs.h"
    1.12 +
    1.13 +struct thumbnail *create_thumbs(const char *dirpath)
    1.14 +{
    1.15 +	DIR *dir;
    1.16 +	struct dirent *dent;
    1.17 +	struct thumbnail *list = 0;
    1.18 +
    1.19 +	if(!(dir = opendir(dirpath))) {
    1.20 +		fprintf(stderr, "failed to open directory: %s: %s\n", dirpath, strerror(errno));
    1.21 +		return 0;
    1.22 +	}
    1.23 +
    1.24 +	while((dent = readdir(dir))) {
    1.25 +		int xsz, ysz;
    1.26 +		unsigned char *pixels;
    1.27 +		struct thumbnail *node;
    1.28 +
    1.29 +		if(!(node = malloc(sizeof *node))) {
    1.30 +			perror("failed to allocate thumbnail list node");
    1.31 +			continue;
    1.32 +		}
    1.33 +
    1.34 +		if(!(node->fname = malloc(strlen(dirpath) + strlen(dent->d_name) + 2))) {
    1.35 +			free(node);
    1.36 +			continue;
    1.37 +		}
    1.38 +		strcpy(node->fname, dirpath);
    1.39 +		if(dirpath[strlen(dirpath) - 1] != '/') {
    1.40 +			strcat(node->fname, "/");
    1.41 +		}
    1.42 +		strcat(node->fname, dent->d_name);
    1.43 +
    1.44 +		if(!(pixels = img_load_pixels(node->fname, &xsz, &ysz, IMG_FMT_RGBA32))) {
    1.45 +			free(node->fname);
    1.46 +			free(node);
    1.47 +			continue;
    1.48 +		}
    1.49 +
    1.50 +		printf("loaded image: %s\n", node->fname);
    1.51 +
    1.52 +		glGenTextures(1, &node->tex);
    1.53 +		glBindTexture(GL_TEXTURE_2D, node->tex);
    1.54 +		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    1.55 +		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    1.56 +		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
    1.57 +		img_free_pixels(pixels);
    1.58 +
    1.59 +		node->aspect = (float)xsz / (float)ysz;
    1.60 +
    1.61 +		node->next = list;
    1.62 +		list = node;
    1.63 +	}
    1.64 +	closedir(dir);
    1.65 +
    1.66 +	return list;
    1.67 +}
    1.68 +
    1.69 +void free_thumbs(struct thumbnail *thumbs)
    1.70 +{
    1.71 +	if(!thumbs) return;
    1.72 +
    1.73 +	while(thumbs) {
    1.74 +		struct thumbnail *tmp = thumbs;
    1.75 +		thumbs = thumbs->next;
    1.76 +
    1.77 +		free(tmp->fname);
    1.78 +		free(tmp);
    1.79 +	}
    1.80 +}
    1.81 +
    1.82 +
    1.83 +void draw_thumbs(struct thumbnail *thumbs, float thumb_sz, float start_y)
    1.84 +{
    1.85 +	int vp[4];
    1.86 +	float gap = thumb_sz / 4.0;
    1.87 +	float x = gap;
    1.88 +	float y = gap + start_y;
    1.89 +	float view_aspect;
    1.90 +
    1.91 +	glGetIntegerv(GL_VIEWPORT, vp);
    1.92 +	view_aspect = (float)(vp[2] - vp[0]) / (vp[3] - vp[1]);
    1.93 +
    1.94 +	glMatrixMode(GL_PROJECTION);
    1.95 +	glPushMatrix();
    1.96 +	glLoadIdentity();
    1.97 +	glOrtho(0, 1, 1.0 / view_aspect, 0, -1, 1);
    1.98 +
    1.99 +	glMatrixMode(GL_MODELVIEW);
   1.100 +
   1.101 +	while(thumbs) {
   1.102 +
   1.103 +		glPushMatrix();
   1.104 +		glTranslatef(x, y, 0);
   1.105 +
   1.106 +		glScalef(thumb_sz, thumb_sz, 1);
   1.107 +
   1.108 +		glBegin(GL_QUADS);
   1.109 +		glColor3f(0.25, 0.25, 0.25);
   1.110 +		glTexCoord2f(0, 0); glVertex2f(0, 0);
   1.111 +		glTexCoord2f(1, 0); glVertex2f(1, 0);
   1.112 +		glTexCoord2f(1, 1); glVertex2f(1, 1);
   1.113 +		glTexCoord2f(0, 1); glVertex2f(0, 1);
   1.114 +		glEnd();
   1.115 +
   1.116 +		if(thumbs->aspect >= 1.0) {
   1.117 +			glTranslatef(0, 0.5 - 0.5 / thumbs->aspect, 0);
   1.118 +			glScalef(1, 1.0 / thumbs->aspect, 1);
   1.119 +		} else {
   1.120 +			glTranslatef(0.5 - thumbs->aspect / 2.0, 0, 0);
   1.121 +			glScalef(thumbs->aspect, 1, 1);
   1.122 +		}
   1.123 +
   1.124 +		glEnable(GL_TEXTURE_2D);
   1.125 +		glBindTexture(GL_TEXTURE_2D, thumbs->tex);
   1.126 +
   1.127 +		glBegin(GL_QUADS);
   1.128 +		glColor3f(1, 1, 1);
   1.129 +		glTexCoord2f(0, 0); glVertex2f(0, 0);
   1.130 +		glTexCoord2f(1, 0); glVertex2f(1, 0);
   1.131 +		glTexCoord2f(1, 1); glVertex2f(1, 1);
   1.132 +		glTexCoord2f(0, 1); glVertex2f(0, 1);
   1.133 +		glEnd();
   1.134 +
   1.135 +		glPopMatrix();
   1.136 +		glDisable(GL_TEXTURE_2D);
   1.137 +
   1.138 +		thumbs->layout_pos[0] = x;
   1.139 +		thumbs->layout_pos[1] = y;
   1.140 +		thumbs->layout_size[0] = thumb_sz;
   1.141 +		thumbs->layout_size[1] = thumb_sz;
   1.142 +
   1.143 +		x += thumb_sz + gap;
   1.144 +		if(x >= 1.0 - thumb_sz) {
   1.145 +			x = gap;
   1.146 +			y += thumb_sz + gap;
   1.147 +		}
   1.148 +
   1.149 +		thumbs = thumbs->next;
   1.150 +	}
   1.151 +
   1.152 +	glMatrixMode(GL_PROJECTION);
   1.153 +	glPopMatrix();
   1.154 +	glMatrixMode(GL_MODELVIEW);
   1.155 +}