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When gl_shader_cache was destroyed, existing user shader entries leaked
the file path string.
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This is a minor precaution, because in some cases the number of shader
programs can already hit 10. (chroma merging + separated cscale/scale +
+ sub blending (interpolated) + sub blending (non-interpolated)
+ output (interpolated) + output (non-interpolated) + OSD)
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Slightly less painful, because C arrays suck.
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This adds stuff related to gamma, linear light, sigmoid, BT.2020-CL,
etc, as well as color management. Also adds a new gamma function (gamma22).
This adds new parameters to configure the CMS settings, in particular
letting us target simple colorspaces without requiring usage of a 3DLUT.
This adds smoothmotion. Mostly working, but it's still sensitive to
timing issues. It's based on an actual queue now, but the queue size
is kept small to avoid larger amounts of latency.
Also makes “upscale before blending” the default strategy.
This is justified because the "render after blending" thing doesn't seme
to work consistently any way (introduces stutter due to the way vsync
timing works, or something), so this behavior is a bit closer to master
and makes pausing/unpausing less weird/jumpy.
This adds the remaining scalers, including bicubic_fast, sharpen3,
sharpen5, polar filters and antiringing. Apparently, sharpen3/5 also
consult scale-param1, which was undocumented in master.
This also implements cropping and chroma transformation, plus
rotation/flipping. These are inherently part of the same logic, although
it's a bit rough around the edges in some case, mainly due to the fallback
code paths (for bilinear scaling without indirection).
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The basic idea is to use dynamically generated shaders instead of a
single monolithic file + a ton of ifdefs. Instead of having to setup
every aspect of it separately (like compiling shaders, setting uniforms,
perfoming the actual rendering steps, the GLSL parts), we generate the
GLSL on the fly, and perform the rendering at the same time. The GLSL
is regenerated every frame, but the actual compiled OpenGL-level shaders
are cached, which makes it fast again. Almost all logic can be in a
single place.
The new code is significantly more flexible, which allows us to improve
the code clarity, performance and add more features easily.
This commit is incomplete. It drops almost all previous code, and
readds only the most important things (some of them actually buggy).
The next commit will complete it - it's separate to preserve authorship
information.
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Basically, the OpenGL API is crap (it takes an offset as pointer).
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Useful if we want to reduce the size of gl_video.c further.
To some degree this emulates traditional glDrawArrays() usage. It also
leaves a loophole for avoiding a reupload every time by leaving
ptr==NULL, although this is unused for now.
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default_tex_params() and texture_size() are each called only once, so
move inline/reimplement them at the caller.
image_dw/dh were unused. texture_w/h, image_format, and component_bits
were rarely used, and can be replaced. Regroup some other fields.
Rename surface_num to surface_idx, because the former sounded like a
count, and not an index. Move fbosurface_next() closer to its callers
too.
Move the DebugMessageCallback() code to gl_utils.c (also simplify it
by always setting the callback, instead of only when it changes).
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This is somewhat messy, because fbotex_init() itself was depending on
some gl_video parameters unrelated to FBO creation (like what scaler was
in use - what the fuck did this check do in this function?), so this
commit does a bit more than moving code around. In particular, the FBO
for the separate scaling intermediate step now always uses GL_NEAREST
sampling, and all FBOs are destroyed/recreated on renderer
reinitialization.
This also moves the function matrix_ortho2d() - trivial enough not to
put it into a separate commit.
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Handles stupid boilerplate OpenGL requires you to handle. It's the same
code as in gl_video.c, although if no VAOs are available, the fallback
code rebinds them on every draw call instead of just once.
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gl_common.c contained the function loader (which is big) and additional
utility functions (not so big, but will grow when moving more out of
gl_video.c). Just split them. There are no changes other than some
modifications to comments.
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