diff options
author | Antonioya <blendergit@gmail.com> | 2019-06-12 17:55:24 +0300 |
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committer | Antonioya <blendergit@gmail.com> | 2019-06-12 17:55:24 +0300 |
commit | db5c8c0393ba94f7ff523e1079ce4642fee661a8 (patch) | |
tree | 6a5872c72a904bbc261a2d529c1b38e33a6c1c3b /source/blender/draw/engines/gpencil | |
parent | da38558da2bc3e460edf9f72c5e16ebe29815515 (diff) |
GPencil: Fix clamp alpha problems when using Regular blend
The problem was the alpha was not premult and the opacity factor was applied two times.
Diffstat (limited to 'source/blender/draw/engines/gpencil')
-rw-r--r-- | source/blender/draw/engines/gpencil/shaders/gpencil_blend_frag.glsl | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_blend_frag.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_blend_frag.glsl index 4a6025fcd24..658c708ee19 100644 --- a/source/blender/draw/engines/gpencil/shaders/gpencil_blend_frag.glsl +++ b/source/blender/draw/engines/gpencil/shaders/gpencil_blend_frag.glsl @@ -115,7 +115,11 @@ void main() if (mode == MODE_REGULAR) { if (stroke_color.a > 0) { if (mix_color.a > 0) { - FragColor = vec4(mix(stroke_color.rgb, mix_color.rgb, mix_color.a * blend_opacity), + /* premult */ + stroke_color = vec4(vec3(stroke_color.rgb / stroke_color.a), stroke_color.a); + mix_color = vec4(vec3(mix_color.rgb / mix_color.a), mix_color.a); + + FragColor = vec4(mix(stroke_color.rgb, mix_color.rgb, mix_color.a), stroke_color.a); gl_FragDepth = mix_depth; } |