Emulate glReadPixels of GL_ALPHA.

[movit] / dither_effect.cpp

diff --git a/dither_effect.cpp b/dither_effect.cpp
index e9ea19f226006e8f30584b7dbc9c1ee95cfd350d..17c577d4cdacc3ae44a4c79015d46c6e888389d6 100644 (file)
--- a/dither_effect.cpp
+++ b/dither_effect.cpp
@@ -1,4 +1,4 @@
-#include <GL/glew.h>
+#include <epoxy/gl.h>
 #include <assert.h>
 #include <stdio.h>
 #include <algorithm>
@@ -84,7 +84,7 @@ void DitherEffect::update_texture(GLuint glsl_program_num, const string &prefix,
        check_error();
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
        check_error();
-       glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE16F_ARB, texture_width, texture_height, 0, GL_LUMINANCE, GL_FLOAT, dither_noise);
+       glTexImage2D(GL_TEXTURE_2D, 0, GL_R16F, texture_width, texture_height, 0, GL_RED, GL_FLOAT, dither_noise);
        check_error();
 
        delete[] dither_noise;