fix white trail in mixer, now it works fine

2018-08-01 18:04:33 +02:00
parent be3b3c089a
commit 8a3760df9e
3 changed files with 4 additions and 3 deletions
--- a/engine/app_shaders.cpp
+++ b/engine/app_shaders.cpp
@@ -354,7 +354,7 @@ void App::initShaders()
        "       mediump vec2 uv_mix = uv_2 / q;\n"
        "       if (uv_mix.x < 0.0 || uv_mix.x > 1.0 || uv_mix.y < 0.0 || uv_mix.y > 1.0) discard;\n"
        "       mediump vec4 mbg = texture(tex_mix, uv_mix);\n"
-        "       fg.rgb = mix(fg.rgb, mbg.rgb, mix_alpha);\n"
+        "       fg.rgb = mix(fg.rgb, mbg.rgb, mix_alpha * mbg.a);\n"
        "   }\n"
        "   mediump float contribution = (1.0 - bg.a) * fg.a;\n"
        "   mediump float alpha_tot = bg.a + contribution;"