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much faster box blur

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This commit is contained in:
itsmattkc
2018-11-16 10:18:57 +11:00
parent 55e1ea4fe9
commit ca47f13fbb
5 changed files with 34 additions and 58 deletions
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effects/boxblur.frag
+13 -33
View File
@@ -9,42 +9,22 @@ uniform vec2 resolution;
uniform bool horiz_blur;
uniform bool vert_blur;
uniform bool opt;
void main(void) {
float rad = floor(radius);
float x_rad = (horiz_blur) ? rad : 0.5;
float y_rad = (vert_blur) ? rad : 0.5;
vec2 texCoord = gl_FragCoord.xy/resolution;
if (radius == 0.0 || (!horiz_blur && !vert_blur)) {
gl_FragColor = texture2D(image, gl_FragCoord.xy/resolution);
gl_FragColor = texture2D(image, texCoord);
} else {
float divider = 1.0 / ((radius*2.0)+1.0);
if (horiz_blur && vert_blur) {
divider *= divider;
gl_FragColor = texture2D(image, gl_FragCoord.xy/resolution)*divider;
for (float i=1.0;i<=radius;i++) {
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x-i, gl_FragCoord.y))/resolution)*(divider);
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x+i, gl_FragCoord.y))/resolution)*(divider);
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x, gl_FragCoord.y+i))/resolution)*(divider);
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x, gl_FragCoord.y-i))/resolution)*(divider);
}
for (float x=1.0;x<=radius;x++) {
for (float y=1.0;y<=radius;y++) {
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x-x, gl_FragCoord.y-y))/resolution)*(divider);
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x+x, gl_FragCoord.y+y))/resolution)*(divider);
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x-x, gl_FragCoord.y+y))/resolution)*(divider);
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x+x, gl_FragCoord.y-y))/resolution)*(divider);
}
}
} else {
gl_FragColor = texture2D(image, gl_FragCoord.xy/resolution)*(divider);
for (float i=1.0;i<=radius;i++) {
if (horiz_blur) {
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x-i, gl_FragCoord.y))/resolution)*(divider);
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x+i, gl_FragCoord.y))/resolution)*(divider);
} else {
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x, gl_FragCoord.y-i))/resolution)*(divider);
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x, gl_FragCoord.y+i))/resolution)*(divider);
}
float divider = 1.0;
if (horiz_blur) divider /= rad;
if (vert_blur) divider /= rad;
for (float x=-x_rad+0.5;x<=x_rad;x+=2.0) {
for (float y=-y_rad+0.5;y<=y_rad;y+=2.0) {
gl_FragColor += texture2D(image, (vec2(gl_FragCoord.x+x, gl_FragCoord.y+y))/resolution)*(divider);
}
}
}
effects/boxblur.xml
+3
View File
@@ -9,5 +9,8 @@
<row name="Vertical">
<field type="bool" default="1" id="vert_blur"/>
</row>
<row name="Opt">
<field type="bool" default="0" id="opt"/>
</row>
<shader vert="common.vert" frag="boxblur.frag"/>
</effect>
effects/invert.xml
+3 -3
View File
@@ -1,7 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<effect name="Volumetric Light" category="Stylize">
<effect name="Invert" category="Color">
<row name="Amount">
<field type="double" min="0" default="100" id="amount"/>
<field type="double" min="0" default="100" max="100" id="amount"/>
</row>
<shader vert="common.vert" frag="volumetriclight.frag"/>
<shader vert="common.vert" frag="invert.frag"/>
</effect>
effects/volumetriclight.xml
+3 -3
View File
@@ -1,7 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<effect name="Invert" category="Color">
<effect name="Volumetric Light" category="Stylize">
<row name="Amount">
<field type="double" min="0" default="100" max="100" id="amount"/>
<field type="double" min="0" default="100" id="amount"/>
</row>
<shader vert="common.vert" frag="invert.frag"/>
<shader vert="common.vert" frag="volumetriclight.frag"/>
</effect>