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main: rework the compatibility check of visuals in glXMakeCurrent

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Now it follows the compatibility criteria listed in section 2.1 of
the GLX 1.4 specification.
This is needed for post-process effects in SW:KotOR.

Signed-off-by: Miklós Máté <mtmkls@gmail.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Miklós Máté 2016-03-24 01:12:59 +01:00 • committed by Marek Olšák
parent df37b06276
commit aad8707b28
1 changed files with 12 additions and 30 deletions
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42
src/mesa/main/context.c
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@ -1525,10 +1525,6 @@ _mesa_copy_context( const struct gl_context *src, struct gl_context *dst,
* Check if the given context can render into the given framebuffer
* by checking visual attributes.
*
* Most of these tests could go away because Mesa is now pretty flexible
* in terms of mixing rendering contexts with framebuffers. As long
* as RGB vs. CI mode agree, we're probably good.
*
* \return GL_TRUE if compatible, GL_FALSE otherwise.
*/
static GLboolean
@ -1541,32 +1537,18 @@ check_compatible(const struct gl_context *ctx,
if (buffer == _mesa_get_incomplete_framebuffer())
return GL_TRUE;
#if 0
/* disabling this fixes the fgl_glxgears pbuffer demo */
if (ctxvis->doubleBufferMode && !bufvis->doubleBufferMode)
return GL_FALSE;
#endif
if (ctxvis->stereoMode && !bufvis->stereoMode)
return GL_FALSE;
if (ctxvis->haveAccumBuffer && !bufvis->haveAccumBuffer)
return GL_FALSE;
if (ctxvis->haveDepthBuffer && !bufvis->haveDepthBuffer)
return GL_FALSE;
if (ctxvis->haveStencilBuffer && !bufvis->haveStencilBuffer)
return GL_FALSE;
if (ctxvis->redMask && ctxvis->redMask != bufvis->redMask)
return GL_FALSE;
if (ctxvis->greenMask && ctxvis->greenMask != bufvis->greenMask)
return GL_FALSE;
if (ctxvis->blueMask && ctxvis->blueMask != bufvis->blueMask)
return GL_FALSE;
#if 0
/* disabled (see bug 11161) */
if (ctxvis->depthBits && ctxvis->depthBits != bufvis->depthBits)
return GL_FALSE;
#endif
if (ctxvis->stencilBits && ctxvis->stencilBits != bufvis->stencilBits)
return GL_FALSE;
#define check_component(foo) \
if (ctxvis->foo && bufvis->foo && \
ctxvis->foo != bufvis->foo) \
return GL_FALSE
check_component(redMask);
check_component(greenMask);
check_component(blueMask);
check_component(depthBits);
check_component(stencilBits);
#undef check_component
return GL_TRUE;
}