|
3f1fd5ab
|
2023-05-23T10:59:03
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|
Updated source to match SDL function prototype style
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92a487f2
|
2023-05-19T14:10:02
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|
style fixes for SDL_PROC macros.
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9670f233
|
2023-01-22T12:27:52
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|
Support MIN/MAX blend on OpenGL + ES
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0479df53
|
2023-01-09T09:48:21
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|
Updated copyright for 2023
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|
d0bbfdbf
|
2022-12-01T16:07:03
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|
Clang-Tidy fixes (#6725)
(cherry picked from commit 3c501b963dd8f0605a6ce7978882df39ba76f9cd)
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b8d85c69
|
2022-11-30T12:51:59
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Update for SDL3 coding style (#6717)
I updated .clang-format and ran clang-format 14 over the src and test directories to standardize the code base.
In general I let clang-format have it's way, and added markup to prevent formatting of code that would break or be completely unreadable if formatted.
The script I ran for the src directory is added as build-scripts/clang-format-src.sh
This fixes:
#6592
#6593
#6594
(cherry picked from commit 5750bcb174300011b91d1de20edb288fcca70f8c)
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fb0ce375
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2022-11-27T17:38:43
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|
Cleanup add brace (#6545)
* Add braces after if conditions
* More add braces after if conditions
* Add braces after while() conditions
* Fix compilation because of macro being modified
* Add braces to for loop
* Add braces after if/goto
* Move comments up
* Remove extra () in the 'return ...;' statements
* More remove extra () in the 'return ...;' statements
* More remove extra () in the 'return ...;' statements after merge
* Fix inconsistent patterns are xxx == NULL vs !xxx
* More "{}" for "if() break;" and "if() continue;"
* More "{}" after if() short statement
* More "{}" after "if () return;" statement
* More fix inconsistent patterns are xxx == NULL vs !xxx
* Revert some modificaion on SDL_RLEaccel.c
* SDL_RLEaccel: no short statement
* Cleanup 'if' where the bracket is in a new line
* Cleanup 'while' where the bracket is in a new line
* Cleanup 'for' where the bracket is in a new line
* Cleanup 'else' where the bracket is in a new line
(cherry picked from commit 6a2200823c66e53bd3cda4a25f0206b834392652 to reduce conflicts merging between SDL2 and SDL3)
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aefc6b5b
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2022-10-18T08:40:03
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Renamed variables, index is the singular of indices
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3d99d310
|
2022-10-18T10:34:56
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Fixed bug #6401 - back-end can choose the order the triangles when rendering rects, attempt to fix small glitch rendering.
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d744aafb
|
2022-09-15T01:00:12
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Added support for simulated vsync in the renderer
This kicks in if the platform doesn't support vsync directly, or if the present fails for some reason (e.g. minimized on some platforms)
Fixes https://github.com/libsdl-org/SDL/issues/5134
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09b6956d
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2022-08-16T15:08:10
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opengl: Support NV12 textures on GPUs with only 2 texture units
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b299cb3d
|
2022-07-17T08:31:16
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Added a utility function to calculate the next power of 2 for a value
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3b191580
|
2022-06-27T17:19:39
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Windows GDK Support (#5830)
* Added GDK
* Simplfied checks in SDL_config_wingdk.h
* Added testgdk sample
* Added GDK readme
* Fixed error in merge of SDL_windows.h
* Additional GDK fixes
* OpenWatcom should not export _SDL_GDKGetTaskQueue
* Formatting fixes
* Moved initialization code into SDL_GDKRunApp
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adc68758
|
2022-06-17T10:22:28
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Added SDL_copyp to avoid size mismatch when copying values (thanks @1bsyl!)
Closes https://github.com/libsdl-org/SDL/pull/5811
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981e1e3c
|
2022-04-23T10:32:40
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Fixed logical size synchronization issue on macOS
https://discourse.libsdl.org/t/sdl-2-0-22-prerelease/35306/6
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cb816308
|
2022-04-08T02:21:52
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render: Update the size/scale/viewport on moves, in addition to resizes.
For OpenGL this means resetting the viewport state shadowing flag too.
Fixes #1504
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95c0fec5
|
2022-03-31T12:35:17
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Vita: PVROGL: fix indentation and ifdef guards
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8c542a35
|
2022-03-29T19:08:56
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Desktop OpenGL 1.X/2.X PSVita Support
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3f8b450d
|
2022-02-05T12:22:34
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extend the code hidden by SDL_HAVE_YUV
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b064ad6a
|
2022-03-08T18:14:10
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Allow GL_ARB_texture_non_power_of_two environment variable to override OpenGL 2.0 check
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60ddb74c
|
2022-02-02T12:19:37
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|
video: rework how we prepare a texture framebuffer.
Now we see if we can create an SDL_Renderer, and if that renderer reports
itself as "accelerated," and added some initial heuristics to the OpenGL
renderer to make better decisions about what qualifies as "accelerated."
This adds some FIXMEs that might be merely hypothetical, and removes the
old OpenGL checks from the video subsystem that probably weren't meaningful
in modern times. This will definitely need to improve the existing list
in the GL renderer, to catch things like llvmpipe, etc.
Reference issue #4624.
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293a0aa8
|
2022-02-22T10:54:21
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opengl: If GL version >= 2.0, NPOT textures are supported, so favor them.
Fixes #5041.
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b0dd4c7d
|
2022-01-10T09:22:07
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SDL_Render OpenGL: do batching like in the GLES2 backend (with no VBO)
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90f0d2ce
|
2022-01-10T09:17:50
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Revert OpenGL point drawing performance, do to proper batching
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b82af9df
|
2022-01-08T14:05:50
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|
Improved OpenGL point drawing performance (thanks @slime73!)
We'll do proper call batching for the SDL 2.0.22 release
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1a73c45a
|
2022-01-08T13:34:49
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|
Fixed incorrect color in the OpenGL driver
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18e4d9fe
|
2022-01-08T09:02:25
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Re-enable line drawing path in render drivers
This is still used for scaled line drawing in RenderDrawLinesWithRects()
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9aac5531
|
2022-01-07T22:42:52
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Remove QueueDrawLines from GL, GLES, GLES2
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120c76c8
|
2022-01-03T09:40:00
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|
Updated copyright for 2022
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724468ae
|
2021-12-13T15:48:55
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GL renderer uses glDrawArrays instead of glBegin/glEnd.
Also change internal colors sent to GL to use unorm8 components instead of float, for improved performance.
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3a5e148b
|
2021-12-14T11:02:07
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Renderer backends use SDL_Color instead of int for geometry colors.
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b786c100
|
2021-11-26T19:45:16
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SDL_render_gl.c: GL_RunCommandQueue: always set viewport_dirty on macOS
Without this, moving the window changes the viewport and causes contents
to render stretched.
Fixes #1504
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8dd6edec
|
2021-11-23T09:30:42
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|
Fixed bug #3232 - Integer overflow generates Illegal instruction under sanitizers + see bug #4995
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f02ad282
|
2021-09-25T11:31:18
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Remove FillRects from back-end, where RenderGeometry can be used
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1fe7e361
|
2021-09-20T16:46:16
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OpenGL: a few opengl functions become unused
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d1925154
|
2021-09-20T16:33:49
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OpenGL: remove RenderCopy and RenderCopyEx from back-end
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b360965d
|
2021-10-21T20:48:05
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|
Added a hint for alternate OpenGL NV12 data format
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a34fe816
|
2021-10-21T12:28:35
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|
Added the ability to bind NV12 textures in the OpenGL renderer
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eb3bf80f
|
2021-09-21T18:15:09
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|
Fixed compiler warnings using Visual Studio 2019
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ca9a3217
|
2021-09-19T15:47:24
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|
render: GL/GLES now draw lines almost perfectly matching software renderer.
One place known to differ in a significant way is a single line segment that
starts and ends on the same point; the GL renderers will light up a single
pixel here, whereas the software renderer will not. My current belief is this
is a bug in the software renderer, based on the wording of the docs:
"SDL_RenderDrawLine() draws the line to include both end points."
You can see an example program that triggers that difference in Bug #2006.
As it stands, the GL renderers might _also_ render diagonal lines differently,
as the the Bresenham step might vary between implementations (one does three
pixels and then two, the other does two and then three, etc). But this patch
causes those lines to start and end on the correct pixel, and that's the best
we can do, and all anyone really needs here.
Not closing any bugs with this patch (yet!), but here are several that it
appears to fix. If no other corner cases pop up, we'll call this done.
Reference Bug #2006.
Reference Bug #1626.
Reference Bug #4001.
...and probably others...
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5faea84c
|
2021-09-18T11:54:25
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render: Mark viewport/cliprect dirty when window is resized.
Fixes #4751.
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4549769d
|
2021-03-07T15:20:45
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|
Add `SDL_RenderSetVSync()`
Currently, if an application wants to toggle VSync, they'd have to tear
down the renderer and recreate it. This patch fixes that by letting
applications call SDL_RenderSetVSync().
This is the same as the patch in #3673, except it applies to all
renderers (including PSP, even thought it seems that the VSync flag is
disabled for that renderer). Furthermore, the renderer flags also change
as well, which #3673 didn't do. It is also an API instead of using hint
callbacks (which could be potentially dangerous).
Closes #3673.
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183eb067
|
2021-09-01T15:46:32
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|
Fixed bug #4711: prevent opengl SDL_renderer from crashing if GL_ARB_multitexture isn't supported
|
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54ca1d19
|
2021-08-27T07:44:03
|
|
SW_RenderGeometry: add a redundant check to clear static analysis (see bug #4600)
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a8f89a01
|
2021-04-23T12:00:14
|
|
Change 'size_indice' to 'size_indices'
|
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47db47c1
|
2021-04-06T21:32:02
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Add SDL_HAVE_RENDER_GEOMETRY to compile or not with RenderGeometry support
|
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cd0663e0
|
2021-04-01T11:47:45
|
|
Fix declaration-after-statement and remove tabs
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e4812611
|
2021-04-01T09:49:16
|
|
Move to SDL_RenderGeometryRaw prototype with separate xy/uv/color pointer parameters
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f73c1eff
|
2021-03-17T09:58:49
|
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Use normalized texture coordinates
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37f78fc1
|
2021-03-16T15:13:15
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|
Add OpenGL implementation
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b99543b6
|
2021-01-11T20:40:11
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opengl: More work on making line drawing match software renderer.
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c0df40e0
|
2021-01-05T17:39:48
|
|
Add more SDL_HAVE_YUV defines
|
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be4cfd51
|
2021-01-05T11:56:22
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|
Add SDL_UpdateNVTexture() to update NV12/21 Texture (bug #5430)
for renderer software, opengl, and opengles2
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9130f7c3
|
2021-01-02T10:25:38
|
|
Updated copyright for 2021
|
|
|
cb361896
|
2020-12-09T07:16:22
|
|
Fixed bug 5235 - All internal sources should include SDL_assert.h
Ryan C. Gordon
We should really stick this in SDL_internal.h or something so it's always available.
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754286c6
|
2020-12-02T13:45:24
|
|
SDL Renderer: specify the correct flag when recreating the window
|
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|
0e4ce848
|
2020-11-08T20:57:17
|
|
opengl: Make diagonal lines match the software renderer.
OpenGL leaves the final line segment open, SDL's software renderer does not,
so we need a tiny bit of trigonometry here to move one more pixel in the right
direction.
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93a2c58c
|
2020-11-08T12:37:09
|
|
opengl: Use GL_LINE_STRIP instead of breaking down into seperate GL_LINES.
Surely GL drivers have improved in the last seven years. I hope...?
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c33f8083
|
2020-10-20T11:12:49
|
|
render: Restoring line rendering fixes that were previously put on hold.
(Backed out hg changeset 7a4240daba46)
|
|
|
b6afbe63
|
2020-04-07T09:38:57
|
|
Added SDL_log.h to SDL_internal.h so logging is available everywhere
|
|
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19a5f4ab
|
2020-03-22T14:32:47
|
|
opengl: Don't enable/disable texturing except when actually rendering.
Otherwise our cached state goes out of sync when updating a texture. Since
these state changes aren't necessary, they were removed instead of updating
the cached state.
Fixes Bugzilla #4998.
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93b26f17
|
2020-02-17T16:15:04
|
|
opengl: Backed out hg changeset 94f9f40a957f
This is the OpenGL line drawing fix for Bugzilla #3182, but there's some
disagreement about what the renderers should do here, so I'm backing this out
until after 2.0.12 ships, and then we'll reevaluate all the renderer backends
to decide what's correct, and make them all work the same.
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ed10d947
|
2020-02-10T12:53:54
|
|
opengl: Build out full GL_LINES and respect the diamond-exit rule.
Likewise for the GLES1 and GLES2 renderers.
This solves the missing pixel at the end of a line and removes all the
heuristics for various platforms/drivers. It's possible we could still use
GL_LINE_STRIP with this and save some vertex buffer space, assuming this
doesn't upset some driver somewhere, but this seems to be a clean fix that
makes the GL renderers match the software renderer output.
Diamond-exit rule explanation:
http://graphics-software-engineer.blogspot.com/2012/04/rasterization-rules.html
Fixes Bugzilla #3182.
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a8780c6a
|
2020-01-16T20:49:25
|
|
Updated copyright date for 2020
|
|
|
5e19e66c
|
2019-12-22T13:39:44
|
|
Fixed bug 4914 - Expose SDL_ScaleMode and add SDL_SetTextureScaleMode/SDL_GetTextureScaleMode
Konrad
This was something rather trivial to add, but asked at least several times before (I did google about it as well).
It should be possible to dynamically change scaling mode of the texture. It is actually trivial task, but until now it was only possible with a hint before creating a texture.
I needed it for my game as well, so I took the liberty of writing it myself.
This patch adds following functions:
SDL_SetTextureScaleMode(SDL_Texture * texture, SDL_ScaleMode scaleMode);
SDL_GetTextureScaleMode(SDL_Texture * texture, SDL_ScaleMode *scaleMode);
That way you can change texture scaling on the fly.
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60d3965e
|
2019-10-30T15:36:17
|
|
Readability: remove redundant return, continue, enum declaration
|
|
|
72660a51
|
2019-10-13T20:52:52
|
|
Fixed bug 4825 - SDL Renderer OpenGL: Buffer overflow (SDL_RENDERCMD_DRAW_LINES)
|
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|
0c263738
|
2019-08-26T18:49:04
|
|
gl/gles/gles2 render: fix SDL_RenderClear being affected by the clip rect in some situations.
|
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|
7162649f
|
2019-06-18T18:58:39
|
|
opengl: Be more robust in failing cases.
Load all possible symbols, not just until one fails, in case they get used
during shutdown, etc.
Fixes Bugzilla #4093.
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|
2ee9b1dd
|
2019-05-19T11:01:36
|
|
Fixed bug 4025 - SDL_Renderer OpenGL : add support for textures ABGR, RGB, BGR
Sylvain
OpenGLES2 SDL renderer has support for textures ARGB, ABGR, RGB and BGR, whereas OpenGL SDL renderer only had ARGB.
If you think it's worth adding it, here's a patch. I quickly tried and it worked, but there may be missing things or corner case.
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b2e76d86
|
2019-03-19T16:52:09
|
|
Fixed Windows RT build
|
|
|
b28e956b
|
2019-03-12T07:59:53
|
|
Fixed bug 4542 - Image flipped vertically when rendering on texture
Have to recompute viewport because projection/glOrtho is different
wether rendering is on target texture or not
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|
40a52cee
|
2019-02-04T18:55:39
|
|
render: Fix OpenGL draw state cache for various points of texture binding.
|
|
|
5e13087b
|
2019-01-04T22:01:14
|
|
Updated copyright for 2019
|
|
|
dc344360
|
2018-12-21T20:53:31
|
|
render: Fix internal state getting out of sync when destroying a texture that was just rendered and then creating a new one, in the GL and GLES2 backends. Fixes bug #4433.
|
|
|
9719f89d
|
2018-11-17T12:12:29
|
|
Back out change initializing renderer blend mode incorrectly.
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|
|
29e15ce6
|
2018-11-17T00:58:45
|
|
The default draw blendmode is SDL_BLENDMODE_NONE
|
|
329f2eb9
|
2018-10-31T20:17:53
|
|
Fix crash when GL_LoadFunctions()/GLES2_LoadFunctions() fails
https://bugzilla.libsdl.org/show_bug.cgi?id=4350
We can't safely call GL_DestroyRenderer() until GL_LoadFunctions()
succeeds because we will be missing functions that we try to use
when activating the renderer for destruction if we have an GL context.
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62494a2e
|
2018-10-31T15:03:41
|
|
Merge SDL-ryan-batching-renderer branch to default.
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|
91820998
|
2018-10-28T21:36:48
|
|
Add and update include guards
Include guards in most changed files were missing, I added them keeping
the same style as other SDL files. In some cases I moved the include
guards around to be the first thing the header has to take advantage of
any possible improvements compiler may have for inclusion guards.
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b262b0eb
|
2018-10-22T20:50:32
|
|
Small stack allocations fall back to malloc if they're unexpectedly large.
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|
0c2e10dc
|
2018-10-01T22:53:45
|
|
render: Make the GL backends cache and defer more state changes.
|
|
|
d04e5524
|
2018-09-25T19:20:31
|
|
render: OpenGL renderer now caches some state, to improve non-batching mode.
(other minor bug fixes in here, too)
|
|
|
c01da217
|
2018-09-24T12:30:47
|
|
render: get rid of the predeclared functions in the GL and Metal renderers.
(others to come as I continue to update render backends!)
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|
051d1cfc
|
2018-09-24T02:08:34
|
|
render: Make opengl backend take advantage of new high-level features.
|
|
|
2241b33f
|
2018-09-23T23:22:56
|
|
render: Update Metal and GL backends to use new high-level features, etc.
Now nothing is uploaded as dynamic data with Metal's setVertexBytes, etc; it's
all in the one big vertex buffer, now.
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|
|
55cb9966
|
2018-09-20T16:36:54
|
|
render: first shot at reworking opengl backend for new batching system.
|
|
|
eb14b635
|
2018-05-07T19:52:25
|
|
Fixed bug 4134 - Render targets lose scale quality after minimizing a fullscreen window
Olli-Samuli Lehmus
If one creates a window with the SDL_WINDOW_FULLSCREEN_DESKTOP flag, and creates a render target with SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear"), and afterwards sets SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "nearest"), after minimizing the window, the scale quality hint is lost on the render target. Textures however do keep their interpolation modes.
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|
40b27fd5
|
2018-02-12T17:00:00
|
|
revert the recent typecast assignment changes (see bug #4079)
also change the void* typedefs for the two vulkan function
pointers added in vulkan_internal.h into generic function
pointer typedefs.
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|
|
90e72bf4
|
2018-01-30T18:08:34
|
|
Fixed ISO C99 compatibility
SDL now builds with gcc 7.2 with the following command line options:
-Wall -pedantic-errors -Wno-deprecated-declarations -Wno-overlength-strings --std=c99
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|
|
e3cc5b2c
|
2018-01-03T10:03:25
|
|
Updated copyright for 2018
|
|
|
a6a4e27a
|
2017-11-12T22:51:12
|
|
Updated SDL's YUV support, many thanks to Adrien Descamps
New functions get and set the YUV colorspace conversion mode:
SDL_SetYUVConversionMode()
SDL_GetYUVConversionMode()
SDL_GetYUVConversionModeForResolution()
SDL_ConvertPixels() converts between all supported RGB and YUV formats, with SSE acceleration for converting from planar YUV formats (YV12, NV12, etc) to common RGB/RGBA formats.
Added a new test program, testyuv, to verify correctness and speed of YUV conversion functionality.
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|
e9652b19
|
2017-10-06T16:50:24
|
|
Fixed bug 3857 - SDL_ConvertPixels misses YUV conversions
Sylvain
Few issues with YUV on SDL2 when using odd dimensions, and missing conversions from/back to YUV formats.
1) The big part is that SDL_ConvertPixels() does not convert to/from YUV in most cases. This now works with any format and also with odd dimensions,
by adding two internal functions SDL_ConvertPixels_YUV_to_ARGB8888 and SDL_ConvertPixels_ARGB8888_to_YUV (could it be XRGB888 ?).
The target format is hard coded to ARGB888 (which is the default in the internal of the software renderer).
In case of different YUV conversion, it will do an intermediate conversion to a ARGB8888 buffer.
SDL_ConvertPixels_YUV_to_ARGB8888 is somehow redundant with all the "Color*Dither*Mod*".
But it allows some completeness of SDL_ConvertPixels to handle all YUV format.
It also works with odd dimensions.
Moreover, I did some benchmark(SDL_ConvertPixel vs Color32DitherYV12Mod1X and Color32DitherYUY2Mod1X).
gcc-6.3 and clang-4.0. gcc performs better than clang. And, with gcc, SDL_ConvertPixels() performs better (20%) than the two C function Color32Dither*().
For instance, to convert 10 times a 3888x2592 image, it takes ~195 ms with SDL_ConvertPixels and ~235 ms with Color32Dither*().
Especially because of gcc vectorize feature that optimises all conversion loops (-ftree-loop-vectorize).
Nb: I put no image pitch for the YUV buffers. because it complexify a little bit the code and the API :
There would be some ambiguity when setting the pitch exactly to image width:
would it a be pitch of image width (for luma and chroma). or just contiguous data ? (could set pitch=0 for the later).
2) Small issues with odd dimensions:
If width "w" is odd, luma plane width is still "w" whereas chroma planes will be "(w + 1)/2". Almost the same for odd h.
Solution is to strategically substitute "w" by "(w+1)/2" at the good places ...
- In the repository, SDL_ConvertPixels() handles YUV only if yuv source format is exactly the same as YUV destination format.
It basically does a memcpy of pixels, but it's done incorrectly when width or height is odd (wrong size of chroma planes). This is fixed.
- SDL Renderers don't support odd width/height for YUV textures.
This is fixed for software, opengl, opengles2. (opengles 1 does not support it and fallback to software rendering).
This is *not* fixed for D3D and D3D11 ... (and others, psp ?)
Only *two* Dither function are fixed ... not sure if others are really used.
- This is not possible to create a NV12/NV12 texture with the software renderer, whereas other renderers allow it.
This is fixed, by using SDL_ConvertPixels underneath.
- It was not possible to SDL_UpdateTexture() of format NV12/NV21 with the software renderer. this is fixed.
Here's also two testcases:
- that do all combination of conversion.
- to test partial UpdateTexture
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c68d3ab7
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2017-08-17T21:35:46
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Watcom supports __FUNCTION__ identifier (and surely not __PRETTY_FUNCTION__)
Partially fixes Bugzilla #3758.
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9451cd81
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2017-08-14T20:07:30
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Fixed compiler warnings
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c59d9923
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2017-08-14T05:51:44
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Implemented more flexible blending modes for accelerated renderers
This fixes bug 2594 - Propose new blend mode, SDL_BLENDMODE_BLEND_DSTA
blendMode = SDL_ComposeCustomBlendMode(SDL_BLENDFACTOR_SRC_ALPHA,
SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA,
SDL_BLENDOPERATION_ADD,
SDL_BLENDFACTOR_ZERO,
SDL_BLENDFACTOR_ONE,
SDL_BLENDOPERATION_ADD);
This fixes bug 2828 - Subtractive Blending
blendMode = SDL_ComposeCustomBlendMode(SDL_BLENDFACTOR_SRC_ALPHA,
SDL_BLENDFACTOR_ONE,
SDL_BLENDOPERATION_SUBTRACT,
SDL_BLENDFACTOR_ZERO,
SDL_BLENDFACTOR_ONE,
SDL_BLENDOPERATION_SUBTRACT);
This goes partway to fixing bug 3684 - Add support for a pre-multiplied alpha blending mode
blendMode = SDL_ComposeCustomBlendMode(SDL_BLENDFACTOR_ONE,
SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA,
SDL_BLENDOPERATION_ADD,
SDL_BLENDFACTOR_ONE,
SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA,
SDL_BLENDOPERATION_ADD);
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6f843b90
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2017-08-12T12:59:22
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Fixed bug 3243 - SDL_SetRenderDrawColor() behaves wrong with RGBA=0
Simon Hug
The bug is in the GL_ResetState and GLES_ResetState functions which get called after a new GL context is created. These functions set the cached current color to transparent black, but the GL specification says the initial color is opaque white.
The attached patch changes the values to 0xffffffff to reflect the initial state of the current color. Should the ResetState functions get called anywhere else in the future, this probably has to call the GL functions itself to ensure that the colors match.
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02773811
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2017-05-18T21:00:11
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render: GL_DestroyRender() should activate first.
Otherwise, we might destroy a different GL context's resources.
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266816b4
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2017-03-26T21:00:19
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Removed newlines from error messages.
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13433c4a
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2017-01-27T21:23:27
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Fixed bug 3569 - GL_UpdateViewport leaves PROJECTION matrix selected
Tom Seddon
GL_ActivateRenderer may call GL_UpdateViewport, which leaves the GL_PROJECTION matrix selected. But after GL_ResetState, the GL_MODELVIEW matrix is selected, suggesting that's the intended default state.
It seems at least like these should be consistent. Presumably GL_UpdateViewport should be doing a glMatrixMode(GL_MODELVIEW) before it finishes.
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