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- changed alpha texture handling to avoid using the deprecated GL_ALPHA8 texture format unless we have a compatibility context of an older GL version.

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This commit is contained in:
Christoph Oelckers 2014-06-21 12:52:19 +02:00
commit d5dceb6874
4 changed files with 50 additions and 9 deletions
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27
src/gl/textures/gl_hwtexture.cpp
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@ -190,8 +190,26 @@ void FHardwareTexture::LoadImage(unsigned char * buffer,int w, int h, unsigned i
bool deletebuffer=false;
bool use_mipmapping = TexFilter[gl_texture_filter].mipmapping;
if (alphatexture) texformat=GL_ALPHA8;
else if (forcenocompression) texformat = GL_RGBA8;
if (alphatexture)
{
// thanks to deprecation and delayed introduction of a suitable replacement feature this has become a bit messy...
if (gl.version >= 3.3f)
{
texformat = GL_R8;
}
else if (gl.version <= 3.0f || gl.hasCompatibility())
{
texformat = GL_ALPHA8;
}
else
{
texformat = GL_RGBA8;
}
}
else if (forcenocompression)
{
texformat = GL_RGBA8;
}
if (glTexID==0) glGenTextures(1,&glTexID);
glBindTexture(GL_TEXTURE_2D, glTexID);
lastbound[texunit]=glTexID;
@ -238,6 +256,11 @@ void FHardwareTexture::LoadImage(unsigned char * buffer,int w, int h, unsigned i
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapparam==GL_CLAMP? GL_CLAMP_TO_EDGE : GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapparam==GL_CLAMP? GL_CLAMP_TO_EDGE : GL_REPEAT);
if (alphatexture && gl.version >= 3.3f)
{
static const GLint swizzleMask[] = {GL_ONE, GL_ONE, GL_ONE, GL_RED};
glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzleMask);
}
clampmode = wrapparam==GL_CLAMP? GLT_CLAMPX|GLT_CLAMPY : 0;
if (forcenofiltering)