X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fblitblur.h;h=ac8f3cc20cf3e3bcfd58deca8a63a32de1a58b4c;hb=c52dacb7bc07e300312e45d605d206222dcbb181;hp=5de8e0a63544bdba324545f468d0d0710ff5f768;hpb=bf8478e3656ae729248a594a57d111f08bed41e0;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/blitblur.h b/shaders/blitblur.h
index 5de8e0a..ac8f3cc 100644
--- a/shaders/blitblur.h
+++ b/shaders/blitblur.h
@@ -31,6 +31,7 @@ static struct vg_shader _shader_blitblur = {
 "uniform vec2 uOverrideDir;\n"
 "uniform float uTime;\n"
 "uniform float uGlitchStrength;\n"
+"uniform vec2 uClampUv;\n"
 "\n"
 "in vec2 aUv;\n"
 "\n"
@@ -51,21 +52,21 @@ static struct vg_shader _shader_blitblur = {
 "void main(){\n"
 "   vec2 vuv = aUv; \n"
 "\n"
-"   if( uGlitchStrength > 0.0 ){\n"
-"      uvec3 p = uvec3( gl_FragCoord.xy, uint(uTime*30.0) );\n"
-"      vec2 g = digital_noise(p).xy;\n"
-"      vuv = aUv + g.xy*uGlitchStrength - uGlitchStrength*0.5;\n"
-"   }\n"
+"   //if( uGlitchStrength > 0.0 ){\n"
+"   //   uvec3 p = uvec3( gl_FragCoord.xy, uint(uTime*30.0) );\n"
+"   //   vec2 g = digital_noise(p).xy;\n"
+"   //   vuv = aUv + g.xy*uGlitchStrength - uGlitchStrength*0.5;\n"
+"   //}\n"
 "\n"
 "   vec2 vrand = rand_hash22( vuv ) * 2.0 - vec2(1.0);\n"
 "   vec2 vrand1 = rand_hash22( vrand ) * 2.0 - vec2(1.0);\n"
 "   \n"
 "   vec2 vdir = texture( uTexMotion, vuv ).xy * uBlurStrength + uOverrideDir;\n"
 "\n"
-"   vec4 vcolour0 = texture( uTexMain, vuv + vdir*vrand.x );\n"
-"   vec4 vcolour1 = texture( uTexMain, vuv + vdir*vrand.y );\n"
-"   vec4 vcolour2 = texture( uTexMain, vuv + vdir*vrand1.x );\n"
-"   vec4 vcolour3 = texture( uTexMain, vuv + vdir*vrand1.y );\n"
+"   vec4 vcolour0 = texture( uTexMain, min(vuv + vdir*vrand.x,uClampUv) );\n"
+"   vec4 vcolour1 = texture( uTexMain, min(vuv + vdir*vrand.y,uClampUv) );\n"
+"   vec4 vcolour2 = texture( uTexMain, min(vuv + vdir*vrand1.x,uClampUv) );\n"
+"   vec4 vcolour3 = texture( uTexMain, min(vuv + vdir*vrand1.y,uClampUv) );\n"
 "\n"
 "   FragColor = ( vcolour0 + vcolour1 + vcolour2 + vcolour3 ) * 0.25;\n"
 "}\n"
@@ -79,6 +80,7 @@ static GLuint _uniform_blitblur_uBlurStrength;
 static GLuint _uniform_blitblur_uOverrideDir;
 static GLuint _uniform_blitblur_uTime;
 static GLuint _uniform_blitblur_uGlitchStrength;
+static GLuint _uniform_blitblur_uClampUv;
 static void shader_blitblur_uInverseRatio(v2f v){
    glUniform2fv(_uniform_blitblur_uInverseRatio,1,v);
 }
@@ -100,6 +102,9 @@ static void shader_blitblur_uTime(float f){
 static void shader_blitblur_uGlitchStrength(float f){
    glUniform1f(_uniform_blitblur_uGlitchStrength,f);
 }
+static void shader_blitblur_uClampUv(v2f v){
+   glUniform2fv(_uniform_blitblur_uClampUv,1,v);
+}
 static void shader_blitblur_register(void){
    vg_shader_register( &_shader_blitblur );
 }
@@ -112,5 +117,6 @@ static void shader_blitblur_link(void){
    _uniform_blitblur_uOverrideDir = glGetUniformLocation( _shader_blitblur.id, "uOverrideDir" );
    _uniform_blitblur_uTime = glGetUniformLocation( _shader_blitblur.id, "uTime" );
    _uniform_blitblur_uGlitchStrength = glGetUniformLocation( _shader_blitblur.id, "uGlitchStrength" );
+   _uniform_blitblur_uClampUv = glGetUniformLocation( _shader_blitblur.id, "uClampUv" );
 }
 #endif /* SHADER_blitblur_H */