X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=dither_effect.cpp;h=1554356213ee1ec13815fd0c5581140010d15d74;hp=87e729a3c9feca0a7253e7617eeb41d287d9f68b;hb=d4f00f9f47a0efaefabaf1efa1a0e214eeecca67;hpb=f1a81dca72da9aa5103527b8c9494381204e70c5

diff --git a/dither_effect.cpp b/dither_effect.cpp
index 87e729a..1554356 100644
--- a/dither_effect.cpp
+++ b/dither_effect.cpp
@@ -1,9 +1,10 @@
-#include <math.h>
+#include <GL/glew.h>
 #include <assert.h>
+#include <algorithm>
 
 #include "dither_effect.h"
+#include "effect_util.h"
 #include "util.h"
-#include "opengl.h"
 
 namespace {
 
@@ -85,6 +86,10 @@ void DitherEffect::set_gl_state(GLuint glsl_program_num, const std::string &pref
 {
 	Effect::set_gl_state(glsl_program_num, prefix, sampler_num);
 
+	assert(width > 0);
+	assert(height > 0);
+	assert(num_bits > 0);
+
 	if (width != last_width || height != last_height || num_bits != last_num_bits) {
 		update_texture(glsl_program_num, prefix, sampler_num);
 		last_width = width;