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gl_array_object encapsulates a set of vertex arrays (see the
GL_APPLE_vertex_array_object extension).
Create a private gl_array_object for drawing the quad for intel_clear_tris()
so we don't have to worry about the user's vertex array state.
This fixes the no-op glClear bug #21638 and removes the need to call
_mesa_PushClientAttrib() and _mesa_PopClientAttrib().
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For non-stereo visuals, which is all we support, we treat
GL_FRONT_LEFT as GL_FRONT. However, they are technically different,
and they have different enum values. Test for either one to determine
if we're in front-buffer rendering mode.
This fix was suggested by Pierre Willenbrock.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
(cherry picked from commit 2085cf24628be7cd297ab0f9ef5ce02bd5a006e2)
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This interface gives the driver two important features. First, it can
allocate the (fake) front-buffer only when needed. Second, it can
tell the buffer allocator the format of buffers being allocated. This
enables support for back-buffer and depth-buffer with different bits
per pixel.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kristian Høgsberg <krh@redhat.com>
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This is a CPU win in general, but in particular reduces the pain of
Mesa's calculation of min/max indices in DrawElements (wtf?).
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i915 actually supports up to 4 (according to header file - not tested),
i965 up to 16 (code already handled this but slightly broken), so don't use 2
for all chips, even though angular dependency is very high.
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Fixes gearsvbo app by Michael Clark.
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Fixes progs/glsl/skinning.c demo.
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Also enable them all regardless of screen bpp, as 32 bpp what I've been
testing against, and haven't been able to detect any screen bpp-specific
troubles with them.
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need to round up height for _mesa_copy_rect otherwise
textures with height smaller than 4 won't get copied to the miptree at all
Also fix up the confusing debug output (don't output unitialized values,
and output if data is present and the compressed flag)
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Triggered in test-fbo from clutter since
37fb2d9b23eab5dbbb43a212c3475cb8016837d8.
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It is possible for ctx->DrawBuffer to be NULL, so don't fault when
that happens. This change is not being committed to master because it
doesn't appear to be necessary there.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Cherry picked from mesa_7_4_branch, commit 49e0c74ddd91900fc4effb6d305d56e0563b456d
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Fixes segfaults when rendering to front buffer.
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Handle the loader returning a fake front-buffer. Since the driver
never specifically requests a fake front-buffer, the driver assumes
that it will never receive both a fake and a real front-buffer.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kristian Høgsberg <krh@redhat.com>
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Track two flags: whether or not front-buffer rendering is currently
enabled and whether or not front-buffer rendering has been enabled
since the last glFlush. If the second flag is set, the front-buffer
is flushed via a loader call back. If the first flag is cleared, the
second flag is cleared at this time.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kristian Høgsberg <krh@redhat.com>
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This gets us the savings for driver-internal viewport calls that
dd1c68f15123a889a3ce9d2afe724e272d163e32 was attempting, without relying
on Xlib internals or clients handling X events.
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This speeds up OA on my GM45 by 21% (more than the original CPU cost of
the upload path). We might still be able to squeeze a few more percent out
by avoiding repeatedly mapping/unmapping buffers as we upload elements into
them.
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We don't upload the pixels with the CPU in that case, so the map will
only serve as a way of triggering cache flushes over a bunch of data we
don't touch.
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i965 can either do SRGBA8_REV format or SARGB8 format, but not SRGBA8.
Could add SRGBA8_REV support to mesa, but simply use SARGB8 for now.
While here, also add true srgb luminance / luminance_alpha support -
unfortunately the published docs fail to mention which asics support
this, tested on g43 so assume this works on any g4x.
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use color format constants instead of magic numbers
remove handling of cpp 0 or 3 (neither is possible) in various places
don't misconfigure 8 bit surface blits as rgb565
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This requires upgrading the interface so that the argument to
glXBindTexImageEXT isn't just dropped on the floor. Note that this only
fixes the accelerated path on Intel, as Mesa's texture format support is
missing x8r8g8b8 support (right now, GL_RGB textures get uploaded as a8r8gb8,
but in this case we're not doing the upload so we can't really work around it
that way).
Fixes bugs with compositors trying to use shaders that use alpha channels, on
windows without a valid alpha channel. Bug #19910 and likely others as well.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
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This was causing hangs in cairogears, as we would blit to the 8bpp target
(A8 texture) as 16bpp, and stomp over state objects.
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This can improve debugging with INTEL_DEBUG=batch,sync by giving smaller
batchbuffers.
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I keep wanting to hack this knob in as a one-time thing, so it seemed useful
to have all the time.
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The 3D destination shares the same cache so we don't have any trouble with
the later commands needing the writes flushed inside of the same batchbuffer.
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front_region may be null.
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The i965 hardware cannot do GL_CLAMP behavior on textures; an earlier
commit forced a software fallback if strict conformance was required
(i.e. the INTEL_STRICT_CONFORMANCE environment variable was set) and
2D textures were used, but it was somewhat flawed - it could trigger
the software fallback even if 2D textures weren't enabled, as long
as one texture unit was enabled.
This fixes that, and adds software fallback for GL_CLAMP behavior with
1D and 3D textures.
It also adds support for a particular setting of the INTEL_STRICT_CONFORMANCE
environment variable, which forces software fallbacks to be taken *all*
the time. This is helpful with debugging. The value is:
export INTEL_STRICT_CONFORMANCE=2
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Remove all references to aux buffers 1..3. Keep AUX0 around for now just
in case, but it'll probably go too someday. I don't know of any OpenGL
drivers since the IRIX days that support aux color buffers.
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Core mesa now unmaps the buffers if needed in these cases.
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Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
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It doesn't have to do anything. See comments for more details.
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We can't render into any texture format; only certain formats.
Check that render-to-texture's format is renderable in the
intel_validate_framebuffer()
There seems to be a bug somewhere that causes rendering to rgb565 textures
to be corrupted so disallow that for now. This will be revisted.
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This doesn't seem to really effect anything but seeing width=0 in drawing
regions was confusing.
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