nuclear@1: #include <stdio.h>
nuclear@1: #include <stdlib.h>
nuclear@1: #include <string.h>
nuclear@1: #include <errno.h>
nuclear@1: #include <dirent.h>
nuclear@1: #include <imago2.h>
nuclear@1: #include "opengl.h"
nuclear@1: #include "thumbs.h"
nuclear@1: 
nuclear@6: #ifndef GL_COMPRESSED_RGB
nuclear@6: #define GL_COMPRESSED_RGB	0x84ed
nuclear@6: #endif
nuclear@6: 
nuclear@1: struct thumbnail *create_thumbs(const char *dirpath)
nuclear@1: {
nuclear@1: 	DIR *dir;
nuclear@1: 	struct dirent *dent;
nuclear@1: 	struct thumbnail *list = 0;
nuclear@1: 
nuclear@2: 	unsigned int intfmt = GL_COMPRESSED_RGB;
nuclear@6: 	if(!strstr(glGetString(GL_EXTENSIONS), "GL_ARB_texture_compression")) {
nuclear@2: 		printf("warning, no texture compression available.\n");
nuclear@2: 		intfmt = GL_RGB;
nuclear@2: 	}
nuclear@2: 
nuclear@1: 	if(!(dir = opendir(dirpath))) {
nuclear@1: 		fprintf(stderr, "failed to open directory: %s: %s\n", dirpath, strerror(errno));
nuclear@1: 		return 0;
nuclear@1: 	}
nuclear@1: 
nuclear@1: 	while((dent = readdir(dir))) {
nuclear@1: 		int xsz, ysz;
nuclear@1: 		unsigned char *pixels;
nuclear@1: 		struct thumbnail *node;
nuclear@1: 
nuclear@1: 		if(!(node = malloc(sizeof *node))) {
nuclear@1: 			perror("failed to allocate thumbnail list node");
nuclear@1: 			continue;
nuclear@1: 		}
nuclear@1: 
nuclear@1: 		if(!(node->fname = malloc(strlen(dirpath) + strlen(dent->d_name) + 2))) {
nuclear@1: 			free(node);
nuclear@1: 			continue;
nuclear@1: 		}
nuclear@1: 		strcpy(node->fname, dirpath);
nuclear@1: 		if(dirpath[strlen(dirpath) - 1] != '/') {
nuclear@1: 			strcat(node->fname, "/");
nuclear@1: 		}
nuclear@1: 		strcat(node->fname, dent->d_name);
nuclear@1: 
nuclear@1: 		if(!(pixels = img_load_pixels(node->fname, &xsz, &ysz, IMG_FMT_RGBA32))) {
nuclear@1: 			free(node->fname);
nuclear@1: 			free(node);
nuclear@1: 			continue;
nuclear@1: 		}
nuclear@1: 
nuclear@1: 		printf("loaded image: %s\n", node->fname);
nuclear@1: 
nuclear@1: 		glGenTextures(1, &node->tex);
nuclear@1: 		glBindTexture(GL_TEXTURE_2D, node->tex);
nuclear@1: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@1: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@2: 		glTexImage2D(GL_TEXTURE_2D, 0, intfmt, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
nuclear@1: 		img_free_pixels(pixels);
nuclear@1: 
nuclear@1: 		node->aspect = (float)xsz / (float)ysz;
nuclear@1: 
nuclear@1: 		node->next = list;
nuclear@1: 		list = node;
nuclear@1: 	}
nuclear@1: 	closedir(dir);
nuclear@1: 
nuclear@1: 	return list;
nuclear@1: }
nuclear@1: 
nuclear@1: void free_thumbs(struct thumbnail *thumbs)
nuclear@1: {
nuclear@1: 	if(!thumbs) return;
nuclear@1: 
nuclear@1: 	while(thumbs) {
nuclear@1: 		struct thumbnail *tmp = thumbs;
nuclear@1: 		thumbs = thumbs->next;
nuclear@1: 
nuclear@1: 		free(tmp->fname);
nuclear@1: 		free(tmp);
nuclear@1: 	}
nuclear@1: }
nuclear@1: 
nuclear@1: 
nuclear@1: void draw_thumbs(struct thumbnail *thumbs, float thumb_sz, float start_y)
nuclear@1: {
nuclear@1: 	int vp[4];
nuclear@1: 	float gap = thumb_sz / 4.0;
nuclear@1: 	float x = gap;
nuclear@1: 	float y = gap + start_y;
nuclear@1: 	float view_aspect;
nuclear@1: 
nuclear@1: 	glGetIntegerv(GL_VIEWPORT, vp);
nuclear@1: 	view_aspect = (float)(vp[2] - vp[0]) / (vp[3] - vp[1]);
nuclear@1: 
nuclear@1: 	glMatrixMode(GL_PROJECTION);
nuclear@1: 	glPushMatrix();
nuclear@1: 	glLoadIdentity();
nuclear@1: 	glOrtho(0, 1, 1.0 / view_aspect, 0, -1, 1);
nuclear@1: 
nuclear@1: 	glMatrixMode(GL_MODELVIEW);
nuclear@1: 
nuclear@1: 	while(thumbs) {
nuclear@1: 
nuclear@1: 		glPushMatrix();
nuclear@1: 		glTranslatef(x, y, 0);
nuclear@1: 
nuclear@1: 		glScalef(thumb_sz, thumb_sz, 1);
nuclear@1: 
nuclear@1: 		glBegin(GL_QUADS);
nuclear@1: 		glColor3f(0.25, 0.25, 0.25);
nuclear@1: 		glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@1: 		glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@1: 		glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@1: 		glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@1: 		glEnd();
nuclear@1: 
nuclear@1: 		if(thumbs->aspect >= 1.0) {
nuclear@1: 			glTranslatef(0, 0.5 - 0.5 / thumbs->aspect, 0);
nuclear@1: 			glScalef(1, 1.0 / thumbs->aspect, 1);
nuclear@1: 		} else {
nuclear@1: 			glTranslatef(0.5 - thumbs->aspect / 2.0, 0, 0);
nuclear@1: 			glScalef(thumbs->aspect, 1, 1);
nuclear@1: 		}
nuclear@1: 
nuclear@1: 		glEnable(GL_TEXTURE_2D);
nuclear@1: 		glBindTexture(GL_TEXTURE_2D, thumbs->tex);
nuclear@1: 
nuclear@1: 		glBegin(GL_QUADS);
nuclear@1: 		glColor3f(1, 1, 1);
nuclear@1: 		glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@1: 		glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@1: 		glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@1: 		glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@1: 		glEnd();
nuclear@1: 
nuclear@1: 		glPopMatrix();
nuclear@1: 		glDisable(GL_TEXTURE_2D);
nuclear@1: 
nuclear@1: 		thumbs->layout_pos[0] = x;
nuclear@1: 		thumbs->layout_pos[1] = y;
nuclear@1: 		thumbs->layout_size[0] = thumb_sz;
nuclear@1: 		thumbs->layout_size[1] = thumb_sz;
nuclear@1: 
nuclear@1: 		x += thumb_sz + gap;
nuclear@1: 		if(x >= 1.0 - thumb_sz) {
nuclear@1: 			x = gap;
nuclear@1: 			y += thumb_sz + gap;
nuclear@1: 		}
nuclear@1: 
nuclear@1: 		thumbs = thumbs->next;
nuclear@1: 	}
nuclear@1: 
nuclear@1: 	glMatrixMode(GL_PROJECTION);
nuclear@1: 	glPopMatrix();
nuclear@1: 	glMatrixMode(GL_MODELVIEW);
nuclear@1: }