Hi,
the attached patch implements depth texture modes which have been missing in
st/mesa since ever. It works with both software pipes and r300g, so it
should be ok.
Please review.
-Marek
From 209f91d0f74279cea42bf6f34b39720f5052e1fb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Ol=C5=A1=C3=A1k?= <mar...@gmail.com>
Date: Mon, 19 Jul 2010 20:46:15 +0200
Subject: [PATCH] st/mesa: implement depth texture modes
---
src/mesa/state_tracker/st_atom_texture.c | 67 ++++++++++++++++++++++++++---
1 files changed, 60 insertions(+), 7 deletions(-)
diff --git a/src/mesa/state_tracker/st_atom_texture.c b/src/mesa/state_tracker/st_atom_texture.c
index 5a650b3..86ded95 100644
--- a/src/mesa/state_tracker/st_atom_texture.c
+++ b/src/mesa/state_tracker/st_atom_texture.c
@@ -41,12 +41,59 @@
#include "st_format.h"
#include "st_cb_texture.h"
#include "pipe/p_context.h"
+#include "util/u_format.h"
#include "util/u_inlines.h"
#include "cso_cache/cso_context.h"
+static uint32_t apply_depthmode(enum pipe_format format,
+ uint32_t _swizzle, uint32_t depthmode)
+{
+ const struct util_format_description *desc =
+ util_format_description(format);
+ unsigned char swiz[4];
+ unsigned i;
+
+ if (desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS ||
+ desc->swizzle[0] == UTIL_FORMAT_SWIZZLE_NONE) {
+ /* Not a depth format. */
+ return _swizzle;
+ }
+
+ for (i = 0; i < 4; i++)
+ swiz[i] = GET_SWZ(_swizzle, i);
+
+ switch (depthmode) {
+ case GL_LUMINANCE:
+ for (i = 0; i < 4; i++)
+ if (swiz[i] == SWIZZLE_W)
+ swiz[i] = SWIZZLE_ONE;
+ else if (swiz[i] < SWIZZLE_W)
+ swiz[i] = SWIZZLE_X;
+ break;
+
+ case GL_INTENSITY:
+ for (i = 0; i < 4; i++)
+ if (swiz[i] <= SWIZZLE_W)
+ swiz[i] = SWIZZLE_X;
+ break;
+
+ case GL_ALPHA:
+ for (i = 0; i < 4; i++)
+ if (swiz[i] == SWIZZLE_W)
+ swiz[i] = SWIZZLE_X;
+ else if (swiz[i] < SWIZZLE_W)
+ swiz[i] = SWIZZLE_ZERO;
+ break;
+ }
+
+ return MAKE_SWIZZLE4(swiz[0], swiz[1], swiz[2], swiz[3]);
+}
+
static boolean check_sampler_swizzle(struct pipe_sampler_view *sv,
- uint32_t _swizzle)
+ uint32_t _swizzle, uint32_t depthmode)
{
+ _swizzle = apply_depthmode(sv->texture->format, _swizzle, depthmode);
+
if ((sv->swizzle_r != GET_SWZ(_swizzle, 0)) ||
(sv->swizzle_g != GET_SWZ(_swizzle, 1)) ||
(sv->swizzle_b != GET_SWZ(_swizzle, 2)) ||
@@ -62,16 +109,19 @@ st_create_texture_sampler_view_from_stobj(struct pipe_context *pipe,
{
struct pipe_sampler_view templ;
+ uint32_t _swizzle = apply_depthmode(stObj->pt->format,
+ stObj->base._Swizzle,
+ stObj->base.DepthMode);
u_sampler_view_default_template(&templ,
stObj->pt,
format);
- if (stObj->base._Swizzle != SWIZZLE_NOOP) {
- templ.swizzle_r = GET_SWZ(stObj->base._Swizzle, 0);
- templ.swizzle_g = GET_SWZ(stObj->base._Swizzle, 1);
- templ.swizzle_b = GET_SWZ(stObj->base._Swizzle, 2);
- templ.swizzle_a = GET_SWZ(stObj->base._Swizzle, 3);
+ if (_swizzle != SWIZZLE_NOOP) {
+ templ.swizzle_r = GET_SWZ(_swizzle, 0);
+ templ.swizzle_g = GET_SWZ(_swizzle, 1);
+ templ.swizzle_b = GET_SWZ(_swizzle, 2);
+ templ.swizzle_a = GET_SWZ(_swizzle, 3);
}
return pipe->create_sampler_view(pipe, stObj->pt, &templ);
@@ -150,7 +200,10 @@ update_textures(struct st_context *st)
/* if sampler view has changed dereference it */
if (stObj->sampler_view)
- if (check_sampler_swizzle(stObj->sampler_view, stObj->base._Swizzle) || (st_view_format != stObj->sampler_view->format))
+ if (check_sampler_swizzle(stObj->sampler_view,
+ stObj->base._Swizzle,
+ stObj->base.DepthMode) ||
+ (st_view_format != stObj->sampler_view->format))
pipe_sampler_view_reference(&stObj->sampler_view, NULL);
sampler_view = st_get_texture_sampler_view_from_stobj(stObj, pipe, st_view_format);
--
1.7.0.4
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