ofxAddons/ofxMsdfgen
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adjust shaders

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This commit is contained in:
jrkb 2023-04-06 11:16:06 +02:00
parent 5fc06a177b
commit 971a9f089d
3 changed files with 50 additions and 32 deletions
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20
data/ofxMsdfgen/shaders/mix/ES2/shader.frag
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@ -1,12 +1,10 @@
precision highp float;
// these are our textures
uniform sampler2D msdf_0;
uniform sampler2D msdf_1;
uniform sampler2D msdf;
uniform vec4 fontColor;
uniform float msdf_mix;
uniform float msdf_pxratio;
uniform float pxRange;
// this comes from the vertex shader
varying vec2 texCoordVarying;
@ -15,8 +13,10 @@ float median(float r, float g, float b) {
return max(min(r, g), min(max(r, g), b));
}
float screenPxRange(float ratio) {
return ratio * 2.0;
float screenPxRange() {
vec2 unitRange = vec2(pxRange)/vec2(textureSize(msdf));
vec2 screenTexSize = vec2(1.0)/fwidth(texCoordVarying);
return max(0.5*dot(unitRange, screenTexSize), 1.0);
}
void main()
@ -24,11 +24,9 @@ void main()
vec4 bgColor = vec4(fontColor.rgb,0);
vec4 fgColor = fontColor;
vec3 msd_0 = texture2D(msdf_0, texCoordVarying).rgb;
vec3 msd_1 = texture2D(msdf_1, texCoordVarying).rgb;
vec3 msd = mix(msd_0, msd_1,msdf_mix);
float sd = median(msd.r, msd.g, msd.b);
float screenPxDistance = screenPxRange(msdf_pxratio)*(sd - 0.5);
vec3 msdf_rgb = texture2D(msdf, texCoordVarying).rgb;
float sd = median(msdf_rgb.r, msdf_rgb.g, msdf_rgb.b);
float screenPxDistance = screenPxRange()*(sd - 0.5);
float opacity = clamp(screenPxDistance + 0.5, 0.0, 1.0);
gl_FragColor = mix(bgColor, fgColor, opacity);
}

14
data/ofxMsdfgen/shaders/mix/GL2/shader.frag
View file

@ -3,11 +3,9 @@ precision highp float;
// these are our textures
uniform sampler2DRect msdf_0;
uniform sampler2DRect msdf_1;
uniform vec4 fontColor;
uniform float msdf_mix;
uniform float msdf_pxratio;
uniform float pxRange;
// this comes from the vertex shader
varying vec2 texCoordVarying;
@ -17,7 +15,9 @@ float median(float r, float g, float b) {
}
float screenPxRange() {
return 2.0;
vec2 unitRange = vec2(pxRange)/vec2(textureSize(msdf));
vec2 screenTexSize = vec2(1.0)/fwidth(texCoordVarying);
return max(0.5*dot(unitRange, screenTexSize), 1.0);
}
void main()
@ -25,10 +25,8 @@ void main()
vec4 bgColor = vec4(fontColor.rgb,0);
vec4 fgColor = fontColor;
vec3 msd_0 = texture2DRect(msdf_0, texCoordVarying).rgb;
vec3 msd_1 = texture2DRect(msdf_1, texCoordVarying).rgb;
vec3 msd = mix(msd_0, msd_1,msdf_mix);
float sd = median(msd.r, msd.g, msd.b);
vec3 msdf_rgb = texture2DRect(msdf, texCoordVarying).rgb;
float sd = median(msdf_rgb.r, msdf_rgb.g, msdf_rgb.b);
float screenPxDistance = screenPxRange()*(sd - 0.5);
float opacity = clamp(screenPxDistance + 0.5, 0.0, 1.0);
gl_FragColor = mix(bgColor, fgColor, opacity);

48
data/ofxMsdfgen/shaders/mix/GL3/shader.frag
View file

@ -2,12 +2,15 @@
precision highp float;
// these are our textures
uniform sampler2DRect msdf_0;
uniform sampler2DRect msdf_1;
uniform sampler2DRect msdf;
uniform vec4 fontColor;
uniform vec2 unitRange;
uniform float msdf_mix;
uniform float msdf_pxratio;
uniform vec2 translation_a;
uniform vec2 scale_a;
uniform vec2 translation_b;
uniform vec2 scale_b;
// this comes from the vertex shader
in vec2 texCoordVarying;
@ -19,20 +22,39 @@ float median(float r, float g, float b) {
return max(min(r, g), min(max(r, g), b));
}
float screenPxRange(float ratio) {
return ratio * 2.0;
float screenPxRange() {
//vec2 unitRange = vec2(pxRange)/vec2(textureSize(msdf));
vec2 screenTexSize = vec2(1.0)/fwidth(texCoordVarying);
return max(0.5*dot(unitRange, screenTexSize), 1.0);
}
float screenPxDistance(vec3 msdf_rgb) {
float sd = median(msdf_rgb.r, msdf_rgb.g, msdf_rgb.b);
return screenPxRange()*(sd - 0.5);
}
void main()
{
vec4 bgColor = vec4(fontColor.rgb,0);
vec4 bgColor = vec4(fontColor.rgb,0.0);
vec4 fgColor = fontColor;
vec3 msd_0 = texture(msdf_0, texCoordVarying).rgb;
vec3 msd_1 = texture(msdf_1, texCoordVarying).rgb;
vec3 msd = mix(msd_0, msd_1,msdf_mix);
float sd = median(msd.r, msd.g, msd.b);
float screenPxDistance = screenPxRange(msdf_pxratio)*(sd - 0.5);
float opacity = clamp(screenPxDistance + 0.5, 0.0, 1.0);
outputColor = mix(bgColor, fgColor, opacity);
vec2 texCoord_a = (texCoordVarying * scale_a) + translation_a;
vec2 texCoord_b = (texCoordVarying * scale_b) + translation_b;
vec3 msdf_rgb_total = texture(msdf, texCoordVarying).rgb;
vec3 msdf_rgb_a = texture(msdf, texCoord_a).rgb;
vec3 msdf_rgb_b = texture(msdf, texCoord_b).rgb;
float screenPxDistance_a = screenPxDistance(msdf_rgb_a);
float screenPxDistance_b = screenPxDistance(msdf_rgb_b);
float screenPxDistance_mix = mix(screenPxDistance_a, screenPxDistance_b, msdf_mix);
float opacity = clamp(screenPxDistance_mix + 0.5, 0.0, 1.0);
if (opacity < 0.5)
discard;
outputColor = vec4(vec3(fgColor),1.0); //mix(bgColor, fgColor, opacity);
//outputColor = vec4(opacity, 1.0-opacity, 0.0, 1.0);
//outputColor = vec4(1.0-msdf_rgb.rgb, 1.0);
//outputColor = vec4(1.0,0.0,1.0,1.0);
}