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d1dd997f07
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36 Commits

Author SHA1 Message Date
Michael Lutz
d1dd997f07 Change: [Win32] Limit the OpenGL video driver to OpenGL 3.2 or newer on Windows. 2021-04-22 21:04:04 +02:00
Michael Lutz
e53313391a Fix: [OpenGL] Check maximum supported texture size against screen resolution. 2021-04-21 22:44:59 +02:00
Michael Lutz
433602b072 Fix #9028: [OpenGL] Clear cursor cache on destroying the OpenGL backend. 2021-04-12 22:40:40 +02:00
Jonathan G Rennison
39b7ef31f8 Fix: Data races on cursor state in OpenGL backends 2021-04-10 18:31:42 +02:00
Jonathan G Rennison
fbd0a2e65a Fix: Thread unsafe use of sprite cache in OpenGLBackend::DrawMouseCursor 
See also: #8870
See also: #8977
 2021-04-10 18:31:42 +02:00
Milek7
7a886cb4d4 Change: Do not disallow persistent buffer mapping on AMD GPUs, as it is actually faster. 2021-03-25 19:37:24 +00:00
Michael Lutz
df958dc907 Fix f0f96e31: [OpenGL] Broken window resizing due to invalid buffer pitch on texture creation. 2021-03-21 22:26:55 +01:00
frosch
0230624359
Fix f0f96e31: [OpenGL] warning: comparison of integer expressions of different signedness. (#8881) 2021-03-21 18:38:51 +01:00
Michael Lutz
f0f96e3103
Fix #8871: [OpenGL] Initialize all buffers after resize and clear back buffer. (#8877) 2021-03-20 19:43:54 +01:00
Michael Lutz
436cdf1fc8 Fix #8825: [OpenGL] Don't clear cursor cache from the game loop thread. 2021-03-08 21:35:35 +01:00
Patric Stout
e56d2c63c3 Add: [Video] move GameLoop into its own thread 
This allows drawing to happen while the GameLoop is doing an
iteration too.

Sadly, not much drawing currently can be done while the GameLoop
is running, as for example PollEvent() or UpdateWindows() can
influence the game-state. As such, they first need to acquire a
lock on the game-state before they can be called.

Currently, the main advantage is the time spend in Paint(), which
for non-OpenGL drivers can be a few milliseconds. For OpenGL this
is more like 0.05 milliseconds; in these instances this change
doesn't add any benefits for now.

This is an alternative to the former "draw-thread", which moved
the drawing in a thread for some OSes. It has similar performance
gain as this does, although this implementation allows for more
finer control over what suffers when the GameLoop takes too
long: drawing or the next GameLoop. For now they both suffer
equally.
 2021-03-08 19:18:55 +01:00
Michael Lutz
d79398a1d5 Fix #8763: [OpenGL] Cursor sprite origin can be negative. 2021-02-28 11:12:13 +01:00
Michael Lutz
77854d561b Fix: [OpenGL] Don't use OpenGL on MESA software renderers. 
Performance in this case is worse than not using OpenGL, so just let
OTTD fall back to a different video driver.
 2021-02-27 19:01:34 +01:00
frosch
dfa141818b Fix: OpenGL cursor did not consider sprite offsets of cursor sprites. 2021-02-27 14:52:11 +01:00
Michael Lutz
311df31fb1 Codechange: [OpenGL] Load all OpenGL functions dynamically. 2021-02-25 00:34:49 +01:00
Michael Lutz
a0c1a3f736 Codechange: [OpenGL] Simplify loading OpenGL extension functions. 2021-02-25 00:34:49 +01:00
Michael Lutz
e1e8cc3851
Fix #8734: [OpenGL] Apply palette remap to cursor sprites. (#8742) 2021-02-24 22:10:25 +01:00
Michael Lutz
b4a3bc1ffe Codechange: [OpenGL] Separate context state setup from general init. 2021-02-22 22:16:07 +01:00
Michael Lutz
86c309ea75 Codechange: [OpenGL] Let OpenGL clear the pixel buffer if possible. 2021-02-22 22:16:07 +01:00
Michael Lutz
ae7c63cc35 Codechange: [OpenGL] Use persistently mapped pixel buffers when supported. 2021-02-22 22:16:07 +01:00
Michael Lutz
200be7d20c Add: [OpenGL] Support for a separate animation buffer that stores the palette values of the screen in addition to the colour buffer. 2021-02-22 22:16:07 +01:00
Michael Lutz
6bcc4884c2 Add: [OpenGL] Accelerated mouse cursor drawing. 2021-02-22 22:16:07 +01:00
Michael Lutz
bcd15b4dd2 Codechange: [OpenGL] Initialize backing store to opaque alpha to allow blending effects. 2021-02-22 22:16:07 +01:00
Michael Lutz
e8fc050b6e Add: [OpenGL] Support for 8bpp blitters. 2021-02-22 22:16:07 +01:00
Michael Lutz
320072c8dc Codechange: [OpenGL] Explicitly assign which framebuffer target receives the colour values. 2021-02-22 22:16:07 +01:00
Michael Lutz
821f30f735 Codechange: [OpenGL] Use GLSL version 1.50 if available. 2021-02-22 22:16:07 +01:00
Michael Lutz
90fd8f8cda Codechange: [OpenGL] Use generic vertex attributes in the shader program. 2021-02-22 22:16:07 +01:00
Michael Lutz
acf59f6b68 Codechange: [OpenGL] Use shaders to display the video buffer on screen. 2021-02-22 22:16:07 +01:00
Michael Lutz
9a069faa01 Codechange: [Win32] Try to get an OpenGL 3.2+ context if possible. 2021-02-22 22:16:07 +01:00
Michael Lutz
a990c497b5 Codechange: [OpenGL] Use a pixel buffer object to store the video buffer. 2021-02-22 22:16:07 +01:00
Michael Lutz
5af0cfd902 Codechange: [OpenGL] Use a vertex array object to store the vertex state for the video buffer. 2021-02-22 22:16:07 +01:00
Michael Lutz
acf2ce35f7 Codechange: [OpenGL] Use a vertex buffer object to store the vertex data for the video buffer. 2021-02-22 22:16:07 +01:00
Michael Lutz
5ad545dcc1 Codechange: [OpenGL] Only update the dirty parts of the video buffer texture. 2021-02-22 22:16:07 +01:00
Michael Lutz
3a77ade6b2 Codechange: [OpenGL] Enable driver debug messages if supported. 2021-02-22 22:16:07 +01:00
Michael Lutz
d7b96a424f Codechange: [OpenGL] Use new-style extension testing introduced with OpenGL 3.0. 2021-02-22 22:16:07 +01:00
Michael Lutz
ef478ade64 Add: [Win32] Video driver that uses OpenGL to transfer the video buffer to the screen. 2021-02-22 22:16:07 +01:00