X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fblit.h;h=116007aa8194e58c09644ec8721ac4596ea61f52;hb=ca35eceae3abfcfb9ba266d6ea8e664bc06b0a3e;hp=12a0dcb2c293823f2b21104175ac7252c56b2b34;hpb=e61356f70eddb79f05d7b9e329e91963ec74f817;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/blit.h b/shaders/blit.h
index 12a0dcb..116007a 100644
--- a/shaders/blit.h
+++ b/shaders/blit.h
@@ -12,10 +12,12 @@ static struct vg_shader _shader_blit = {
 "layout (location=0) in vec2 a_co;\n"
 "out vec2 aUv;\n"
 "\n"
+"uniform vec2 uInverseRatio;\n"
+"\n"
 "void main()\n"
 "{\n"
 "   gl_Position = vec4(a_co*2.0-1.0,0.0,1.0);\n"
-"   aUv = a_co;\n"
+"   aUv = a_co * uInverseRatio;\n"
 "}\n"
 ""},
    .fs = 
@@ -66,7 +68,11 @@ static struct vg_shader _shader_blit = {
 ""},
 };
 
+static GLuint _uniform_blit_uInverseRatio;
 static GLuint _uniform_blit_uTexMain;
+static void shader_blit_uInverseRatio(v2f v){
+   glUniform2fv(_uniform_blit_uInverseRatio,1,v);
+}
 static void shader_blit_uTexMain(int i){
    glUniform1i(_uniform_blit_uTexMain,i);
 }
@@ -75,6 +81,7 @@ static void shader_blit_register(void){
 }
 static void shader_blit_use(void){ glUseProgram(_shader_blit.id); }
 static void shader_blit_link(void){
+   _uniform_blit_uInverseRatio = glGetUniformLocation( _shader_blit.id, "uInverseRatio" );
    _uniform_blit_uTexMain = glGetUniformLocation( _shader_blit.id, "uTexMain" );
 }
 #endif /* SHADER_blit_H */