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gl: use red for single channel textures instead of alpha on GLES3 

Only GLES2 needs to use the alpha channel. glTexStorage2D only supports
red.
Issue #1391
This commit is contained in:
Flyinghead 2024-02-09 12:59:50 +01:00
parent c146a92f83
commit 3469b7fca7
1 changed files with 3 additions and 2 deletions
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5
core/rend/gles/gles.cpp
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@ -49,7 +49,7 @@ const char* ShaderCompatSource = R"(
#if TARGET_GL == GLES3
out highp vec4 FragColor;
#define gl_FragColor FragColor
#define FOG_CHANNEL a
#define FOG_CHANNEL r
#elif TARGET_GL == GL3
out highp vec4 FragColor;
#define gl_FragColor FragColor
@ -554,6 +554,7 @@ void findGLVersion()
gl.border_clamp_supported = true;
gl.prim_restart_supported = false;
gl.prim_restart_fixed_supported = true;
gl.single_channel_format = GL_RED;
}
else
{
@ -562,8 +563,8 @@ void findGLVersion()
gl.index_type = GL_UNSIGNED_SHORT;
gl.prim_restart_supported = false;
gl.prim_restart_fixed_supported = false;
gl.single_channel_format = GL_ALPHA;
}
gl.single_channel_format = GL_ALPHA;
const char *extensions = (const char *)glGetString(GL_EXTENSIONS);
if (strstr(extensions, "GL_OES_packed_depth_stencil") != NULL)
gl.GL_OES_packed_depth_stencil_supported = true;