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Code Issues Projects Releases Packages Wiki Activity Actions 5

gl_engine: corrected ColorDodge, ColorBurn equation

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issue: https://github.com/thorvg/thorvg/issues/3072
This commit is contained in:
Hermet Park 2025-01-14 12:12:29 +09:00 • committed by Mira Grudzinska
parent e815fd25e4
commit c460591b39
1 changed files with 10 additions and 23 deletions
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33
src/renderer/gl_engine/tvgGlShaderSrc.cpp
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@ -690,18 +690,12 @@ const char* COLOR_DODGE_BLEND_FRAG = COMPLEX_BLEND_HEADER R"(
vec4 srcColor = texture(uSrcTexture, vUV);
vec4 dstColor = texture(uDstTexture, vUV);
float opacity = srcColor.a;
srcColor *= 255.0;
dstColor *= 255.0;
vec4 color = vec4(
255.0 - srcColor.r > 0.0 ? dstColor.r / (255.0 - srcColor.r) : dstColor.r,
255.0 - srcColor.g > 0.0 ? dstColor.g / (255.0 - srcColor.g) : dstColor.g,
255.0 - srcColor.b > 0.0 ? dstColor.b / (255.0 - srcColor.b) : dstColor.b,
255.0 - srcColor.a > 0.0 ? dstColor.a / (255.0 - srcColor.a) : dstColor.a
FragColor = vec4(
1.0 - srcColor.r > 0.0 ? dstColor.r / (1.0 - srcColor.r) : dstColor.r,
1.0 - srcColor.g > 0.0 ? dstColor.g / (1.0 - srcColor.g) : dstColor.g,
1.0 - srcColor.b > 0.0 ? dstColor.b / (1.0 - srcColor.b) : dstColor.b,
1.0
);
FragColor = vec4(color.rgb, 255.0) * opacity / 255.0;
}
)";
@ -710,19 +704,12 @@ const char* COLOR_BURN_BLEND_FRAG = COMPLEX_BLEND_HEADER R"(
vec4 srcColor = texture(uSrcTexture, vUV);
vec4 dstColor = texture(uDstTexture, vUV);
float opacity = srcColor.a;
if (srcColor.a > 0.0) srcColor.rgb /= srcColor.a;
if (dstColor.a > 0.0) dstColor.rgb /= dstColor.a;
vec4 id = vec4(1.0) - dstColor;
vec4 color = vec4(
srcColor.r > 0.0 ? (255.0 - (255.0 - dstColor.r * 255.0) / (srcColor.r * 255.0)) / 255.0 : (1.0 - dstColor.r),
srcColor.g > 0.0 ? (255.0 - (255.0 - dstColor.g * 255.0) / (srcColor.g * 255.0)) / 255.0 : (1.0 - dstColor.g),
srcColor.b > 0.0 ? (255.0 - (255.0 - dstColor.b * 255.0) / (srcColor.b * 255.0)) / 255.0 : (1.0 - dstColor.b),
srcColor.a > 0.0 ? (255.0 - (255.0 - dstColor.a * 255.0) / (srcColor.a * 255.0)) / 255.0 : (1.0 - dstColor.a)
FragColor = vec4(
srcColor.r > 0.0 ? (1.0 - (1.0 - dstColor.r) / srcColor.r) : dstColor.r,
srcColor.g > 0.0 ? (1.0 - (1.0 - dstColor.g) / srcColor.g) : dstColor.g,
srcColor.b > 0.0 ? (1.0 - (1.0 - dstColor.b) / srcColor.b) : dstColor.b,
1.0
);
FragColor = color * srcColor.a;
}
)";