Nouveau - Sep 2010 - [Bug 30172] New: GL_EXT_framebuffer_blit function required

https://bugs.freedesktop.org/show_bug.cgi?id=30172

           Summary: GL_EXT_framebuffer_blit function required
           Product: Mesa
           Version: git
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: medium
         Component: Drivers/DRI/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: alex.buell at munted.org.uk


Couldn't find Drivers/Gallium/Nouveau in the Component list so put this in
here.

It would be nice to get GL_EXT_framebuffer_blit implemented for the Nouveau
driver, as some programs I have tested won't work without this function.

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https://bugs.freedesktop.org/show_bug.cgi?id=30172

--- Comment #1 from Luca Barbieri <luca.barbieri at gmail.com> 2010-09-13
20:53:58 PDT ---
EXT_framebuffer_blit is supported with any Gallium driver, by the state tracker
itself.

Perhaps you mean the nouveau_vieux DRI driver?

If not, what are exactly the issues you are experiencing?

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--- Comment #2 from Alex Buell <alex.buell at munted.org.uk> 2010-09-14
00:43:25 PDT ---
I am getting this:

$ scons
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
g++ -o glsl_toon glsl_toon.o build/Shader.o build/ShaderProgram.o build/Timer.o
build/VertexBuffer.o build/Mesh.o build/Light.o build/Texture.o
build/FrameTimer.o build/FrameBuffer.o -lSDL -lSDL_image -lGL -lGLU
build/FrameBuffer.o: In function `FrameBuffer::BlitTo(FrameBuffer*, unsigned
int, unsigned int)':
FrameBuffer.cpp:(.text+0x1373): undefined reference to
`glBlitFramebufferEXT'
collect2: ld returned 1 exit status
scons: *** [glsl_toon] Error 1
scons: building terminated because of errors.

Grepping the includes shows that it is definitely defined in the includes so
probably it's not in the libraries.

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--- Comment #3 from Alex Buell <alex.buell at munted.org.uk> 2010-09-14
00:47:03 PDT ---
As far as I am aware I'm using the nouveau_dri.so driver with X.
nouveau_vieux_dri.so is built but not used. 

(--) PCI:*(0:1:0:0) 10de:0324:1028:015f nVidia Corporation NV34M [GeForce FX
Go5
200 64M] rev 161, Mem @ 0xfc000000/16777216, 0xd0000000/268435456, BIOS @
0x????
????/131072

(II) Loading /usr/lib/xorg/modules/extensions/libdri.so
(II) Module dri: vendor="X.Org Foundation"
    compiled for 1.7.7, module version = 1.0.0
    ABI class: X.Org Server Extension, version 2.0
(II) Loading extension XFree86-DRI
(II) LoadModule: "dri2"
(II) Loading /usr/lib/xorg/modules/extensions/libdri2.so
(II) Module dri2: vendor="X.Org Foundation"
    compiled for 1.7.7, module version = 1.1.0
    ABI class: X.Org Server Extension, version 2.0
(II) Loading extension DRI2
(II) LoadModule: "nouveau"
(II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so
(II) Module nouveau: vendor="X.Org Foundation"
    compiled for 1.7.7, module version = 0.0.16
    Module class: X.Org Video Driver
    ABI class: X.Org Video Driver, version 6.0
(II) LoadModule: "dri"
(II) Reloading /usr/lib/xorg/modules/extensions/libdri.so
(II) NOUVEAU(0): Loaded DRI module
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 9, (OK)
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 9, (OK)
drmOpenByBusid: Searching for BusID pci:0000:01:00.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 9, (OK)
drmOpenByBusid: drmOpenMinor returns 9
drmOpenByBusid: drmGetBusid reports pci:0000:01:00.0
(II) [drm] DRM interface version 1.3
(II) [drm] DRM open master succeeded.
(--) NOUVEAU(0): Chipset: "NVIDIA NV34"

(II) NOUVEAU(0): Opened GPU channel 1
(II) NOUVEAU(0): [DRI2] Setup complete
(II) NOUVEAU(0): GART: 128MiB available
(II) NOUVEAU(0): GART: Allocated 16MiB as a scratch buffer
(II) EXA(0): Driver allocated offscreen pixmaps
(II) EXA(0): Driver registered support for the following operations:
(II)         Solid
(II)         Copy
(II)         Composite (RENDER acceleration)
(II)         UploadToScreen
(II)         DownloadFromScreen
(==) NOUVEAU(0): Backing store disabled
(==) NOUVEAU(0): Silken mouse enabled
(II) NOUVEAU(0): [XvMC] Associated with NV30 texture adapter.
(II) NOUVEAU(0): [XvMC] Extension initialized.
(**) NOUVEAU(0): DPMS enabled
(II) NOUVEAU(0): RandR 1.2 enabled, ignore the following RandR disabled
message.
(WW) NOUVEAU(0): Option "DPI" is not used
(--) RandR disabled
(II) Initializing built-in extension Generic Event Extension
(II) Initializing built-in extension SHAPE
(II) Initializing built-in extension MIT-SHM
(II) Initializing built-in extension XInputExtension
(II) Initializing built-in extension XTEST
(II) Initializing built-in extension BIG-REQUESTS
(II) Initializing built-in extension SYNC
(II) Initializing built-in extension XKEYBOARD
(II) Initializing built-in extension XC-MISC
(II) Initializing built-in extension XINERAMA
(II) Initializing built-in extension XFIXES
(II) Initializing built-in extension RENDER
(II) Initializing built-in extension RANDR
(II) Initializing built-in extension COMPOSITE
(II) Initializing built-in extension DAMAGE
(II) AIGLX: enabled GLX_MESA_copy_sub_buffer
(II) AIGLX: enabled GLX_SGI_make_current_read
(II) AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control
(II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects
(II) AIGLX: Loaded and initialized /usr/lib/dri/nouveau_dri.so
(II) GLX: Initialized DRI2 GL provider for screen 0
(II) NOUVEAU(0): NVEnterVT is called.
(II) NOUVEAU(0): Setting screen physical size to 423 x 317
resize called 1600 1200

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--- Comment #4 from Luca Barbieri <luca.barbieri at gmail.com> 2010-09-14
01:19:23 PDT ---
Indeed Mesa only exports glBlitFramebuffer and not glBlitFramebufferEXT.

It seems this was done intentionally by adding static_dispatch="false"
to its
definition.

I'm not sure what are the rules for choosing whether to export an entry
point
as a function and thus whether this was an appropriate choice or not.

nVidia seems to export it, so probably Mesa should too.

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Luca Barbieri <luca.barbieri at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|enhancement                 |normal
          Component|Drivers/DRI/nouveau         |Mesa core
         AssignedTo|nouveau at lists.freedesktop.o |mesa-dev at
lists.freedesktop.
                   |rg                          |org

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