# HG changeset patch
# User John Tsiombikas <nuclear@member.fsf.org>
# Date 1391132400 -7200
# Node ID 026cdd1737ff717eeac2ab13dff17cda43553c4d
# Parent  469ce01809bc5f837fa97ee971cbe496cf813476
added spaceball controls to the example and needless GLEW dependency

diff -r 469ce01809bc -r 026cdd1737ff examples/imgthumbs/Makefile
--- a/examples/imgthumbs/Makefile	Fri Jan 31 03:17:24 2014 +0200
+++ b/examples/imgthumbs/Makefile	Fri Jan 31 03:40:00 2014 +0200
@@ -1,3 +1,6 @@
+# change PREFIX to install elsewhere (default: /usr/local)
+PREFIX = /usr/local
+
 src = $(wildcard src/*.c)
 obj = $(src:.c=.o)
 bin = imgthumbs
@@ -6,9 +9,9 @@
 LDFLAGS = $(libgl) -limago
 
 ifeq ($(shell uname -s), Darwin)
-	libgl = -framework OpenGL -framework GLUT
+	libgl = -framework OpenGL -framework GLUT -lGLEW
 else
-	libgl = -lGL -lGLU -lglut
+	libgl = -lGL -lGLU -lglut -lGLEW
 endif
 
 $(bin): $(obj)
@@ -17,3 +20,12 @@
 .PHONY: clean
 clean:
 	rm -f $(obj) $(bin)
+
+.PHONY: install
+install:
+	mkdir -p $(DESTDIR)$(PREFIX)/bin
+	cp $(bin) $(DESTDIR)$(PREFIX)/bin/$(bin)
+
+.PHONY: uninstall
+uninstall:
+	rm -f $(DESTDIR)$(PREFIX)/bin/$(bin)
diff -r 469ce01809bc -r 026cdd1737ff examples/imgthumbs/src/main.c
--- a/examples/imgthumbs/src/main.c	Fri Jan 31 03:17:24 2014 +0200
+++ b/examples/imgthumbs/src/main.c	Fri Jan 31 03:40:00 2014 +0200
@@ -13,6 +13,7 @@
 static void keyb(unsigned char key, int x, int y);
 static void mouse(int bn, int st, int x, int y);
 static void motion(int x, int y);
+static void sball_motion(int x, int y, int z);
 static struct thumbnail *find_thumb(int x, int y);
 
 const char *path = ".";
@@ -43,6 +44,7 @@
 	glutKeyboardFunc(keyb);
 	glutMouseFunc(mouse);
 	glutMotionFunc(motion);
+	glutSpaceballMotionFunc(sball_motion);
 
 	if(init() == -1) {
 		return 1;
@@ -55,6 +57,8 @@
 
 static int init(void)
 {
+	glewInit();
+
 	thumbs = create_thumbs(path);
 	return 0;
 }
@@ -211,6 +215,26 @@
 	}
 }
 
+static void sball_motion(int x, int y, int z)
+{
+	float fx = -x * 0.0004;
+	float fy = z * 0.0004;
+	float fz = -y * 0.0005;
+
+	if(show_thumb) {
+		show_pan_x += fx / show_zoom;
+		show_pan_y += fy / show_zoom;
+		show_zoom += fz;
+		if(show_zoom <= 0) show_zoom = 0;
+	} else {
+		pan_x += fx;
+		pan_y += fy;
+		thumbs_size += fz;
+		if(thumbs_size <= 0.01) thumbs_size = 0.01;
+	}
+	glutPostRedisplay();
+}
+
 static struct thumbnail *find_thumb(int x, int y)
 {
 	float fx = (float)x / (float)win_width;
diff -r 469ce01809bc -r 026cdd1737ff examples/imgthumbs/src/opengl.h
--- a/examples/imgthumbs/src/opengl.h	Fri Jan 31 03:17:24 2014 +0200
+++ b/examples/imgthumbs/src/opengl.h	Fri Jan 31 03:40:00 2014 +0200
@@ -1,6 +1,8 @@
 #ifndef OPENGL_H_
 #define OPENGL_H_
 
+#include <GL/glew.h>
+
 #ifdef __APPLE__
 #include <GLUT/glut.h>
 #else
diff -r 469ce01809bc -r 026cdd1737ff examples/imgthumbs/src/thumbs.c
--- a/examples/imgthumbs/src/thumbs.c	Fri Jan 31 03:17:24 2014 +0200
+++ b/examples/imgthumbs/src/thumbs.c	Fri Jan 31 03:40:00 2014 +0200
@@ -13,6 +13,12 @@
 	struct dirent *dent;
 	struct thumbnail *list = 0;
 
+	unsigned int intfmt = GL_COMPRESSED_RGB;
+	if(!GLEW_ARB_texture_compression) {
+		printf("warning, no texture compression available.\n");
+		intfmt = GL_RGB;
+	}
+
 	if(!(dir = opendir(dirpath))) {
 		fprintf(stderr, "failed to open directory: %s: %s\n", dirpath, strerror(errno));
 		return 0;
@@ -50,7 +56,7 @@
 		glBindTexture(GL_TEXTURE_2D, node->tex);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+		glTexImage2D(GL_TEXTURE_2D, 0, intfmt, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 		img_free_pixels(pixels);
 
 		node->aspect = (float)xsz / (float)ysz;