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This fixes a warning when compiling with clang.
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On most platforms, they are recursively included, but not all.
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The previous attempt was missing some code paths, so there were still
shaders generated that triggered the shader compilation error. Fix it
instead by special handling USE_CONV in the shader.
By the way, the shader compiler did not accept:
#if defined(USE_CONV) && (USE_CONV == ...)
In my opinion this should be perfectly fine, but it gives the same
error as before. So test USE_CONV separately with #ifndef.
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The OSX shader compiler was giving this error:
ERROR: 0:235: '' : syntax error incorrect preprocessor directive
on this line:
[235] #if USE_CONV == CONV_PLANAR
USE_CONV was undefined in some cases. The expected behavior is that the
shader preprocessor interprets this as branch not taken (AFAIK exactly
as in C), which is probably what the standard would dictate. This is
possible an OSX bug. But admittedly, I'm not sure whether this is really
standard behavior (in C or GLSL), and doing this is extremely weird at
best, so make sure that USE_CONV is always defined.
Should fix behavior on OSX.
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Replaces the numeric magic values -1 and 0 with "no" and "auto". The
numeric values are still allowed for compatibility.
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Allows playing video with alpha information on X11, as long as the video
contains alpha and the window manager does compositing. See vo.rst.
Whether a window can be transparent is decided by the choice of the X
Visual used for window creation. Unfortunately, there's no direct way to
request such a Visual through the GLX or the X API, and use of the
XRender extension is required to find out whether a Visual implies a
framebuffer with alpha used by XRender (see for example [1]). Instead of
depending on the XRender wrapper library (which would require annoying
configure checks, even though XRender is virtually always supported),
use a simple heuristics to find out whether a Visual has alpha. Since
getting it wrong just means an optional feature will not work as
expected, we consider this ok.
[1] http://stackoverflow.com/questions/4052940/how-to-make-an-opengl-
rendering-context-with-transparent-background/9215724#9215724
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When displaying YUV with alpha plane (an extremely rare special case),
we didn't upload the alpha plane, because we don't do anything with it.
This actually created some annoying special cases, so upload the alpha
planes as well, even if they're unused.
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There's really no reason for this, but it feels nice being able to
support a weird pixel format.
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Preparation for NV12 support.
Also adds support for IMGFMT_YA8.
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This is a bit cleaner. Also don't repeat the chroma shift calculations
over and over, but store the image size instead, which is simpler and
will give us a chance to fix display of non-mod-2 image sizes.
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gl_video.c contains all rendering code, gl_lcms.c the .icc loader and
creation of 3D LUT (and all LittleCMS specific code). vo_opengl.c is
reduced to interfacing between the various parts.
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