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Merge pull request #841 from justburner/HSLBlendGPU

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Update Shader Fx: HSL Blend GPU
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manongjohn 2021-12-04 08:55:21 -05:00 committed by GitHub
commit d1b5c84110
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4 changed files with 44 additions and 30 deletions
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11
stuff/config/current.txt
View file

@ -531,11 +531,12 @@
<item>"SHADER_spinblurGPU.radius" "Safe Radius" </item>
<item>"SHADER_spinblurGPU.blur" "Blur" </item>
<item>"SHADER_HSLBlendGPU" "GPU HSL Blend" </item>
<item>"SHADER_HSLBlendGPU.bhue" "Hue" </item>
<item>"SHADER_HSLBlendGPU.bsat" "Saturation" </item>
<item>"SHADER_HSLBlendGPU.blum" "Luminosity" </item>
<item>"SHADER_HSLBlendGPU.balpha" "Blend Alpha" </item>
<item>"SHADER_HSLBlendGPU" "GPU HSL Blend" </item>
<item>"SHADER_HSLBlendGPU.bhue" "Hue" </item>
<item>"SHADER_HSLBlendGPU.bsat" "Saturation" </item>
<item>"SHADER_HSLBlendGPU.blum" "Luminosity" </item>
<item>"SHADER_HSLBlendGPU.balpha" "Opacity" </item>
<item>"SHADER_HSLBlendGPU.bmask" "Clipping Mask" </item>
<!---------------------------------------------------------------------------------------->

6
stuff/library/shaders/HSLBlendGPU.xml
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@ -60,4 +60,10 @@
0 1
</Range>
</Parameter>
<Parameter>
bool bmask
<Default>
0
</Default>
</Parameter>
</Parameters>

50
stuff/library/shaders/programs/HSLBlendGPU.frag
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@ -8,12 +8,13 @@ uniform mat3 worldToOutput;
uniform sampler2D inputImage[2];
uniform mat3 outputToInput[2];
uniform bool bhue;
uniform bool bsat;
uniform bool blum;
uniform float balpha;
uniform bool bhue; // Blend HUE?
uniform bool bsat; // Blend Saturation?
uniform bool blum; // Blend Luminosity?
uniform float balpha; // Blending Alpha
uniform bool bmask; // Base mask?
// ---------------------------
// Blending calculations from:
// https://www.khronos.org/registry/OpenGL/extensions/KHR/KHR_blend_equation_advanced.txt
@ -84,35 +85,40 @@ vec3 SetLumSat(vec3 cbase, vec3 csat, vec3 clum)
return SetLum(color, clum);
}
// ---------------------------
void main( void )
{
// Read sources
vec2 s_texPos = (outputToInput[0] * vec3(gl_FragCoord.xy, 1.0)).xy;
vec2 d_texPos = (outputToInput[1] * vec3(gl_FragCoord.xy, 1.0)).xy;
vec4 s_frag = texture2D(inputImage[0], s_texPos);
vec4 d_frag = texture2D(inputImage[1], d_texPos);
vec2 fg_texPos = (outputToInput[0] * vec3(gl_FragCoord.xy, 1.0)).xy;
vec2 bg_texPos = (outputToInput[1] * vec3(gl_FragCoord.xy, 1.0)).xy;
vec4 fg_frag = texture2D(inputImage[0], fg_texPos);
vec4 bg_frag = texture2D(inputImage[1], bg_texPos);
// De-premultiplication
vec3 s_pix = vec3(0.0);
if (s_frag.a > 0.0) s_pix = s_frag.rgb / s_frag.a;
vec3 d_pix = vec3(0.0);
if (d_frag.a > 0.0) d_pix = d_frag.rgb / d_frag.a;
vec3 fg_pix = vec3(0.0);
if (fg_frag.a > 0.0) fg_pix = fg_frag.rgb / fg_frag.a;
vec3 bg_pix = vec3(0.0);
if (bg_frag.a > 0.0) bg_pix = bg_frag.rgb / bg_frag.a;
// Figure out output alpha
float s_alpha = s_frag.a * balpha;
float d_alpha = d_frag.a;
gl_FragColor.a = s_alpha + d_alpha * (1.0 - s_alpha);
float fg_alpha = fg_frag.a * balpha;
float bg_alpha = bg_frag.a;
if (bmask) {
gl_FragColor.a = bg_alpha;
} else {
gl_FragColor.a = fg_alpha + bg_alpha * (1.0 - fg_alpha);
}
if (gl_FragColor.a <= 0.0) discard;
// Perform blending
if (s_alpha > 0.0 && d_alpha > 0.0) {
vec3 o_pix = SetLumSat(bhue ? s_pix : d_pix, bsat ? s_pix : d_pix, blum ? s_pix : d_pix);
gl_FragColor.rgb = mix(d_pix, o_pix, balpha);
} else if (s_alpha > 0.0) {
gl_FragColor.rgb = s_pix;
if (fg_alpha > 0.0 && bg_alpha > 0.0) {
vec3 o_pix = SetLumSat(bhue ? fg_pix : bg_pix, bsat ? fg_pix : bg_pix, blum ? fg_pix : bg_pix);
gl_FragColor.rgb = mix(bg_pix, o_pix, balpha);
} else if (fg_alpha > 0.0) {
gl_FragColor.rgb = fg_pix;
} else {
gl_FragColor.rgb = d_pix;
gl_FragColor.rgb = bg_pix;
}
// Premultiplication

1
stuff/profiles/layouts/fxs/SHADER_HSLBlendGPU.xml
View file

@ -4,5 +4,6 @@
<control>bsat</control>
<control>blum</control>
<control>balpha</control>
<control>bmask</control>
</page>
</fxlayout>