X-Git-Url: https://git.ralfj.de/gltest.git/blobdiff_plain/abe5b74c820514f9f5896309e0e192569db35651..3a76a0c4ceb98363495605f8b16f5620d36ba68a:/glutil_gl2.cpp

diff --git a/glutil_gl2.cpp b/glutil_gl2.cpp
index 68a789b..87d8e0c 100644
--- a/glutil_gl2.cpp
+++ b/glutil_gl2.cpp
@@ -78,8 +78,7 @@ static T_proc resolveFunctionPointer(T_glGetProcAddress p_glGetProcAddress, cons
 {
 	T_proc proc = p_glGetProcAddress(name);
 	if (proc == NULL) {
-		fprintf(stderr, "Error resolvung function %s\n", name);
-		exit(1);
+		die("Error resolvung function %s\n", name);
 	}
 	return proc;
 }
@@ -96,8 +95,7 @@ void resolveFunctionPointers(T_glGetProcAddress p_glGetProcAddress)
 	int majorVersion;
 	ssm >> majorVersion;
 	if (majorVersion < 2) {
-		fprintf(stderr, "Need at least GL 2.0 to function properly, but detected version %d\n", majorVersion);
-		exit(1);
+		die("Need at least GL 2.0 to function properly, but detected version %d\n", majorVersion);
 	}
 #endif
 	
@@ -130,6 +128,8 @@ void resolveFunctionPointers(T_glGetProcAddress p_glGetProcAddress)
 // shaders
 static const char *vertex_shader_source =
 "#version 100 \n\
+precision mediump float;\n\
+precision mediump int;\n\
 attribute vec2 position; \n\
 attribute vec3 color; \n\
 varying vec3 frag_color; \n\
@@ -140,6 +140,8 @@ void main() \n\
 }";
 static const char *fragment_shader_source =
 "#version 100 \n\
+precision mediump float;\n\
+precision mediump int;\n\
 varying vec3 frag_color; \n\
 void main(void) \n\
 { \n\