implement canvas touch lock

2017-08-19 13:18:35 +01:00
parent ac3857b697
commit da4bfff69b
12 changed files with 56 additions and 27 deletions
--- a/engine/app_shaders.cpp
+++ b/engine/app_shaders.cpp
@@ -228,7 +228,7 @@ void App::initShaders()
 #else
        "   mediump vec4 bg = texture(tex_bg, uv2);\n"
 #endif
-        "   if (fg.a == 1.0/255.0) { frag = bg; return; }\n"
+        "   if (fg.a < 1.0/255.0) { frag = bg; return; }\n"
        "   mediump float contribution = max((1.0 - bg.a) * fg.a, 1.0/255.0);\n"
        "   mediump float alpha_tot = bg.a + contribution;"
        "   mediump vec3 rgb = mix(bg.rgb, fg.rgb, fg.a / alpha_tot);\n"