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Add Spline36 texture scalers

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ZironZ committed 2026-04-07 13:25:00 -04:00
1 parent 62bea77bd0
commit 8c5246f521
4 files changed
+230
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assets/lang/en_US.ini
+2
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@@ -1543,6 +1543,8 @@ Off = Off
TexMMPX = TexMMPX
Tex2xBRZ = Tex2xBRZ
Tex4xBRZ = Tex4xBRZ
TexSpline36 = Spline36 (2x)
TexSpline36_4x = Spline36 (4x)
TexMMPXAdvanced = TexMMPXAdvanced
TexNNEDI3NNS16 = NNEDI3 (2x)
TexNNEDI3NNS16_4x = NNEDI3 (4x)
assets/shaders/defaultshaders.ini
+12
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@@ -206,6 +206,18 @@ Name=4xBRZ (4x)
Author=Hyllian
Compute=tex_4xbrz.csh
Scale=4
[TexSpline36]
Type=Texture
Name=Spline36 (2x)
Author=PPSSPP contributors
Compute=tex_spline36_2x.csh
Scale=2
[TexSpline36_4x]
Type=Texture
Name=Spline36 (4x)
Author=PPSSPP contributors
Compute=tex_spline36_4x.csh
Scale=4
[TexMMPX]
Type=Texture
Name=MMPX (2x)
assets/shaders/tex_spline36_2x.csh
+108
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@@ -0,0 +1,108 @@
// Spline36 texture upscaler (2x), adapted from the existing post-processing shader.
const vec2 HALF_PIXEL = vec2(0.5, 0.5);
const int SCALE = 2;
float Spline36_0_1(float x) {
return ((13.0 / 11.0 * x - 453.0 / 209.0) * x - 3.0 / 209.0) * x + 1.0;
}
float Spline36_1_2(float x) {
return ((-6.0 / 11.0 * x + 612.0 / 209.0) * x - 1038.0 / 209.0) * x + 540.0 / 209.0;
}
float Spline36_2_3(float x) {
return ((1.0 / 11.0 * x - 159.0 / 209.0) * x + 434.0 / 209.0) * x - 384.0 / 209.0;
}
vec4 SampleInput(int x, int y) {
int clampedX = clamp(x, 0, params.width - 1);
int clampedY = clamp(y, 0, params.height - 1);
return readColorf(uvec2(clampedX, clampedY));
}
vec4 InterpolateHorizontally(vec2 inputPos, ivec2 inputPosFloor, int dy) {
float sumOfWeights = 0.0;
vec4 sumOfWeightedPixel = vec4(0.0);
float x = inputPos.x - float(inputPosFloor.x - 2);
float weight = Spline36_2_3(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x - 2, inputPosFloor.y + dy);
x -= 1.0;
weight = Spline36_1_2(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x - 1, inputPosFloor.y + dy);
x -= 1.0;
weight = Spline36_0_1(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x + 0, inputPosFloor.y + dy);
x = 1.0 - x;
weight = Spline36_0_1(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x + 1, inputPosFloor.y + dy);
x += 1.0;
weight = Spline36_1_2(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x + 2, inputPosFloor.y + dy);
x += 1.0;
weight = Spline36_2_3(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x + 3, inputPosFloor.y + dy);
return sumOfWeightedPixel / sumOfWeights;
}
vec4 ProcessSpline36(vec2 inputPos) {
ivec2 inputPosFloor = ivec2(floor(inputPos));
float sumOfWeights = 0.0;
vec4 sumOfWeightedPixel = vec4(0.0);
float y = inputPos.y - float(inputPosFloor.y - 2);
float weight = Spline36_2_3(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, -2);
y -= 1.0;
weight = Spline36_1_2(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, -1);
y -= 1.0;
weight = Spline36_0_1(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, 0);
y = 1.0 - y;
weight = Spline36_0_1(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, 1);
y += 1.0;
weight = Spline36_1_2(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, 2);
y += 1.0;
weight = Spline36_2_3(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, 3);
return sumOfWeightedPixel / sumOfWeights;
}
void applyScaling(uvec2 xy) {
ivec2 destXY = ivec2(xy) * SCALE;
for (int oy = 0; oy < SCALE; ++oy) {
for (int ox = 0; ox < SCALE; ++ox) {
vec2 inputPos = vec2(xy) + (vec2(float(ox), float(oy)) + HALF_PIXEL) / float(SCALE) - HALF_PIXEL;
writeColorf(destXY + ivec2(ox, oy), ProcessSpline36(inputPos));
}
}
}
assets/shaders/tex_spline36_4x.csh
+108
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@@ -0,0 +1,108 @@
// Spline36 texture upscaler (4x), adapted from the existing post-processing shader.
const vec2 HALF_PIXEL = vec2(0.5, 0.5);
const int SCALE = 4;
float Spline36_0_1(float x) {
return ((13.0 / 11.0 * x - 453.0 / 209.0) * x - 3.0 / 209.0) * x + 1.0;
}
float Spline36_1_2(float x) {
return ((-6.0 / 11.0 * x + 612.0 / 209.0) * x - 1038.0 / 209.0) * x + 540.0 / 209.0;
}
float Spline36_2_3(float x) {
return ((1.0 / 11.0 * x - 159.0 / 209.0) * x + 434.0 / 209.0) * x - 384.0 / 209.0;
}
vec4 SampleInput(int x, int y) {
int clampedX = clamp(x, 0, params.width - 1);
int clampedY = clamp(y, 0, params.height - 1);
return readColorf(uvec2(clampedX, clampedY));
}
vec4 InterpolateHorizontally(vec2 inputPos, ivec2 inputPosFloor, int dy) {
float sumOfWeights = 0.0;
vec4 sumOfWeightedPixel = vec4(0.0);
float x = inputPos.x - float(inputPosFloor.x - 2);
float weight = Spline36_2_3(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x - 2, inputPosFloor.y + dy);
x -= 1.0;
weight = Spline36_1_2(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x - 1, inputPosFloor.y + dy);
x -= 1.0;
weight = Spline36_0_1(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x + 0, inputPosFloor.y + dy);
x = 1.0 - x;
weight = Spline36_0_1(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x + 1, inputPosFloor.y + dy);
x += 1.0;
weight = Spline36_1_2(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x + 2, inputPosFloor.y + dy);
x += 1.0;
weight = Spline36_2_3(x);
sumOfWeights += weight;
sumOfWeightedPixel += weight * SampleInput(inputPosFloor.x + 3, inputPosFloor.y + dy);
return sumOfWeightedPixel / sumOfWeights;
}
vec4 ProcessSpline36(vec2 inputPos) {
ivec2 inputPosFloor = ivec2(floor(inputPos));
float sumOfWeights = 0.0;
vec4 sumOfWeightedPixel = vec4(0.0);
float y = inputPos.y - float(inputPosFloor.y - 2);
float weight = Spline36_2_3(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, -2);
y -= 1.0;
weight = Spline36_1_2(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, -1);
y -= 1.0;
weight = Spline36_0_1(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, 0);
y = 1.0 - y;
weight = Spline36_0_1(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, 1);
y += 1.0;
weight = Spline36_1_2(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, 2);
y += 1.0;
weight = Spline36_2_3(y);
sumOfWeights += weight;
sumOfWeightedPixel += weight * InterpolateHorizontally(inputPos, inputPosFloor, 3);
return sumOfWeightedPixel / sumOfWeights;
}
void applyScaling(uvec2 xy) {
ivec2 destXY = ivec2(xy) * SCALE;
for (int oy = 0; oy < SCALE; ++oy) {
for (int ox = 0; ox < SCALE; ++ox) {
vec2 inputPos = vec2(xy) + (vec2(float(ox), float(oy)) + HALF_PIXEL) / float(SCALE) - HALF_PIXEL;
writeColorf(destXY + ivec2(ox, oy), ProcessSpline36(inputPos));
}
}
}