Fix an issue where a (cached) shader program could be used from multiple

[movit] / dither_effect.h

diff --git a/dither_effect.h b/dither_effect.h
index 20fb025532d5fea4e92329c7733d06669354b39d..921a1ef5e1130ca6184e401fe06e8b267b4c67e2 100644 (file)
--- a/dither_effect.h
+++ b/dither_effect.h
@@ -43,7 +43,7 @@
 // like many LCD monitors do, but it starts to get very hairy, again, for limited gains.)
 // The dither is also deterministic across runs.
 
-#include <GL/glew.h>
+#include <epoxy/gl.h>
 #include <string>
 
 #include "effect.h"
@@ -66,6 +66,7 @@ public:
        // premultiplied error. However, we need to do dithering in the same
        // space as quantization, whether that be pre- or postmultiply.
        virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
+       virtual bool one_to_one_sampling() const { return true; }
 
        void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
 
@@ -77,6 +78,9 @@ private:
        int texture_width, texture_height;
 
        GLuint texnum;
+       float uniform_round_fac, uniform_inv_round_fac;
+       float uniform_tc_scale[2];
+       GLint uniform_dither_tex;
 };
 
 }  // namespace movit