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OpenGL: don't use alpha test for GLSL materials (#16832)

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This fixes crack for transparent textures on legacy GL (overlay was visible even if base was transparent),
because our shader code assumed that transparent pixels would be discarded early.
This commit is contained in:
sfan5
2026-01-10 10:52:48 +01:00
committed by GitHub
parent 37c5001f98
commit cf39065511
3 changed files with 5 additions and 25 deletions
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9
src/client/shader.cpp
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@@ -790,14 +790,7 @@ void ShaderSource::generateShader(ShaderInfo &shaderinfo)
ShaderConstants constants = input_const;
bool use_discard = m_fully_programmable;
if (!use_discard) {
// workaround for a certain OpenGL implementation lacking GL_ALPHA_TEST
const char *renderer = reinterpret_cast<const char*>(GL.GetString(GL.RENDERER));
if (strstr(renderer, "GC7000"))
use_discard = true;
}
if (use_discard) {
{
if (shaderinfo.base_material == video::EMT_TRANSPARENT_ALPHA_CHANNEL)
constants["USE_DISCARD"] = 1;
else if (shaderinfo.base_material == video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF)