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gallium: Obtain ARB_framebuffer_no_attachment constants

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Set default values for the constants required in
ARB_framebuffer_no_attachments and obtained the number
of layers from ``PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS``.

We also obtain the MaxFramebufferSamples value using
a query back to the driver for PIPE_FORMAT_NONE.

V.1:
 Merge if branch predicates into one branch.
 Move const init into st_init_limits()

[airlied: whitespace fixup]
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Edward O'Callaghan
2016-02-17 21:01:57 +11:00
committed by Dave Airlie
parent 4bc9130fba
commit 2016e9ffda
1 changed files with 28 additions and 0 deletions
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src/mesa/state_tracker/st_extensions.c
+28
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@@ -445,6 +445,18 @@ void st_init_limits(struct pipe_screen *screen,
extensions->ARB_shader_image_load_store = GL_TRUE;
extensions->ARB_shader_image_size = GL_TRUE;
}
/* ARB_framebuffer_no_attachments */
c->MaxFramebufferWidth = c->MaxViewportWidth;
c->MaxFramebufferHeight = c->MaxViewportHeight;
/* NOTE: we cheat here a little by assuming that
* PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS has the same
* number of layers as we need, although we technically
* could have more the generality is not really useful
* in practicality.
*/
c->MaxFramebufferLayers =
screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
}
@@ -956,6 +968,9 @@ void st_init_extensions(struct pipe_screen *screen,
enum pipe_format int_formats[] = {
PIPE_FORMAT_R8G8B8A8_SINT
};
enum pipe_format void_formats[] = {
PIPE_FORMAT_NONE
};
consts->MaxSamples =
get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
@@ -976,6 +991,12 @@ void st_init_extensions(struct pipe_screen *screen,
get_max_samples_for_formats(screen, ARRAY_SIZE(int_formats),
int_formats, consts->MaxSamples,
PIPE_BIND_SAMPLER_VIEW);
/* ARB_framebuffer_no_attachments, assume max no. of samples 32 */
consts->MaxFramebufferSamples =
get_max_samples_for_formats(screen, ARRAY_SIZE(void_formats),
void_formats, 32,
PIPE_BIND_RENDER_TARGET);
}
if (consts->MaxSamples == 1) {
/* one sample doesn't really make sense */
@@ -1068,6 +1089,13 @@ void st_init_extensions(struct pipe_screen *screen,
extensions->AMD_vertex_shader_viewport_index = GL_TRUE;
}
/* ARB_framebuffer_no_attachments */
if (screen->get_param(screen, PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT) &&
((consts->MaxSamples >= 4 && consts->MaxFramebufferLayers >= 2048) ||
(consts->MaxFramebufferSamples >= consts->MaxSamples &&
consts->MaxFramebufferLayers >= consts->MaxArrayTextureLayers)))
extensions->ARB_framebuffer_no_attachments = GL_TRUE;
/* GL_ARB_ES3_compatibility.
*
* Assume that ES3 is supported if GLSL 3.30 is supported.