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Merge pull request #31571 from NeoSpark314/tonemapping_none_option
Don't clamp color to [0, 1] in Linear tonemapping
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2beea262be
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@ -306,7 +306,7 @@
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Replace glow blending mode. Replaces all pixels' color by the glow value.
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</constant>
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<constant name="TONE_MAPPER_LINEAR" value="0" enum="ToneMapper">
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Linear tonemapper operator. Reads the linear data and performs an exposure adjustment.
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Linear tonemapper operator. Reads the linear data and passes it on unmodified.
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</constant>
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<constant name="TONE_MAPPER_REINHARDT" value="1" enum="ToneMapper">
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Reinhardt tonemapper operator. Performs a variation on rendered pixels' colors by this formula: [code]color = color / (1 + color)[/code].
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@ -164,7 +164,8 @@ vec3 linear_to_srgb(vec3 color) { // convert linear rgb to srgb, assumes clamped
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return mix((vec3(1.0f) + a) * pow(color.rgb, vec3(1.0f / 2.4f)) - a, 12.92f * color.rgb, lessThan(color.rgb, vec3(0.0031308f)));
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}
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vec3 apply_tonemapping(vec3 color, float white) { // inputs are LINEAR, always outputs clamped [0;1] color
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// inputs are LINEAR, If Linear tonemapping is selected no transform is performed else outputs are clamped [0, 1] color
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vec3 apply_tonemapping(vec3 color, float white) {
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#ifdef USE_REINHARD_TONEMAPPER
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return tonemap_reinhard(color, white);
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#endif
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@ -177,7 +178,7 @@ vec3 apply_tonemapping(vec3 color, float white) { // inputs are LINEAR, always o
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return tonemap_aces(color, white);
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#endif
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return clamp(color, vec3(0.0f), vec3(1.0f)); // no other selected -> linear
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return color; // no other selected -> linear: no color transform applied
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}
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vec3 gather_glow(sampler2D tex, vec2 uv) { // sample all selected glow levels
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@ -220,10 +221,14 @@ vec3 apply_glow(vec3 color, vec3 glow) { // apply glow using the selected blendi
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#endif
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#ifdef USE_GLOW_SCREEN
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//need color clamping
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color = clamp(color, vec3(0.0f), vec3(1.0f));
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color = max((color + glow) - (color * glow), vec3(0.0));
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#endif
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#ifdef USE_GLOW_SOFTLIGHT
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//need color clamping
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color = clamp(color, vec3(0.0f), vec3(1.0));
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glow = glow * vec3(0.5f) + vec3(0.5f);
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color.r = (glow.r <= 0.5f) ? (color.r - (1.0f - 2.0f * glow.r) * color.r * (1.0f - color.r)) : (((glow.r > 0.5f) && (color.r <= 0.25f)) ? (color.r + (2.0f * glow.r - 1.0f) * (4.0f * color.r * (4.0f * color.r + 1.0f) * (color.r - 1.0f) + 7.0f * color.r)) : (color.r + (2.0f * glow.r - 1.0f) * (sqrt(color.r) - color.r)));
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@ -265,14 +270,16 @@ void main() {
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color *= exposure;
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// Early Tonemap & SRGB Conversion
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// Early Tonemap & SRGB Conversion; note that Linear tonemapping does not clamp to [0, 1]; some operations below expect a [0, 1] range and will clamp
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color = apply_tonemapping(color, white);
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#ifdef KEEP_3D_LINEAR
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// leave color as is (-> don't convert to SRGB)
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#else
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color = linear_to_srgb(color); // regular linear -> SRGB conversion
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//need color clamping
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color = clamp(color, vec3(0.0f), vec3(1.0f));
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color = linear_to_srgb(color); // regular linear -> SRGB conversion (needs clamped values)
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#endif
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// Glow
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@ -282,6 +289,7 @@ void main() {
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// high dynamic range -> SRGB
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glow = apply_tonemapping(glow, white);
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glow = clamp(glow, vec3(0.0f), vec3(1.0f));
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glow = linear_to_srgb(glow);
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color = apply_glow(color, glow);
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