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The encoding/decoding algorithms are shared with RGTC.
Thanks to some magic with the base format, the RGTC texstore functions work
for LATC too.
swrast passes the related piglit tests besides two things:
- The alpha channel is wrong (it's always 1), however the incorrect alpha
channel makes some other tests fail too, so I guess it's unrelated to LATC.
- Signed LATC fetches aren't correct yet (signed values are clamped to [0,1]),
however RGTC has the same problem.
Further testing (with other of my patches) shows that hardware drivers
and softpipe work.
BTW, ETQW uses this extension.
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This adds support for the RGTC unsigned and signed
texture storage and fetch methods.
the code is a port of the DXT5 alpha compression code.
Signed-off-by: Dave Airlie <airlied@redhat.com>
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This implements the extension by choosing a different set of texture
fetch functions when the texture parameter changes.
Signed-off-by: Dave Airlie <airlied@redhat.com>
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From reading EXT_texture_sRGB and EXT_framebuffer_sRGB and interactions
with FBO I've found that swrast is converting the sRGB values to linear for
blending when an sRGB texture is bound as an FBO. According to the spec
and further explained in the framebuffer_sRGB spec this behaviour is not
required unless the GL_FRAMEBUFFER_SRGB is enabled and the Visual/config
exposes GL_FRAMEBUFFER_SRGB_CAPABLE_EXT.
This patch fixes swrast to use a separate Fetch call for FBOs bound to
SRGB and avoid the conversions.
v2: export _mesa_get_texture_dimensions as per Brian's comments.
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Radeon GPUs can do this. R600 can even do render-to-texture.
Packing and extracting aren't implemented, but we shouldn't hit them (I think).
Tested with swrast, softpipe, and r300g.
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Radeon GPUs do support GL_RGB10_A2.
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This should prevent the field going unset in the future. See bug
http://bugs.freedesktop.org/show_bug.cgi?id=31544 for background.
Also remove unneeded calls to clear_teximage_fields().
Finally, call _mesa_set_fetch_functions() from the
_mesa_init_teximage_fields() function so callers have one less
thing to worry about.
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Don't rely on inclusion of other files that already include macros.h.
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As defined by GL_EXT_texture_integer.
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24-bit Z in 32-bit pixel. We could probably use the MESA_FORMAT_S8_Z24
format but this there's a few places where we explicitly don't want stencil.
This format may go away at some point in the future.
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Call it from in the main Mesa glTexImage functions.
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Not used by any hardware driver. ARGB4444 and ARGB4444_REV remain.
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Removed: MESA_FORMAT_RGBA, RGB, ALPHA, LUMINANCE, LUMINANCE_ALPHA, INTENSITY.
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