Mesa (staging/22.1): zink: add a function for getting the minimum framebuffer layers
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gitlab-mirror at kemper.freedesktop.org
Fri Jun 17 20:34:11 UTC 2022
Module: Mesa
Branch: staging/22.1
Commit: 0c283ca15627954239913de43e386aaf2a4b7675
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=0c283ca15627954239913de43e386aaf2a4b7675
Author: Mike Blumenkrantz <michael.blumenkrantz at gmail.com>
Date: Wed Jun 15 12:58:03 2022 -0400
zink: add a function for getting the minimum framebuffer layers
this clamps the layer count to the smallest number of layers rather
than the largest
cc: mesa-stable
Reviewed-by: Adam Jackson <ajax at redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17061>
(cherry picked from commit f74df6205d245491a8a54ffa6e737f22b9b00fb4)
Conflicts:
src/gallium/drivers/zink/zink_framebuffer.h
---
.pick_status.json | 2 +-
src/gallium/drivers/zink/zink_framebuffer.c | 23 +++++++++++++++++++++++
src/gallium/drivers/zink/zink_framebuffer.h | 4 ++++
3 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/.pick_status.json b/.pick_status.json
index fe8b2b4058b..cd8a0908a05 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -895,7 +895,7 @@
"description": "zink: add a function for getting the minimum framebuffer layers",
"nominated": true,
"nomination_type": 0,
- "resolution": 0,
+ "resolution": 1,
"main_sha": null,
"because_sha": null
},
diff --git a/src/gallium/drivers/zink/zink_framebuffer.c b/src/gallium/drivers/zink/zink_framebuffer.c
index fd21a695c95..99aead406ae 100644
--- a/src/gallium/drivers/zink/zink_framebuffer.c
+++ b/src/gallium/drivers/zink/zink_framebuffer.c
@@ -378,3 +378,26 @@ zink_get_framebuffer(struct zink_context *ctx)
return fb;
}
+
+/* same as u_framebuffer_get_num_layers, but clamp to lowest layer count */
+unsigned
+zink_framebuffer_get_num_layers(const struct pipe_framebuffer_state *fb)
+{
+ unsigned i, num_layers = UINT32_MAX;
+ if (!(fb->nr_cbufs || fb->zsbuf))
+ return MAX2(fb->layers, 1);
+
+ for (i = 0; i < fb->nr_cbufs; i++) {
+ if (fb->cbufs[i]) {
+ unsigned num = fb->cbufs[i]->u.tex.last_layer -
+ fb->cbufs[i]->u.tex.first_layer + 1;
+ num_layers = MIN2(num_layers, num);
+ }
+ }
+ if (fb->zsbuf) {
+ unsigned num = fb->zsbuf->u.tex.last_layer -
+ fb->zsbuf->u.tex.first_layer + 1;
+ num_layers = MIN2(num_layers, num);
+ }
+ return MAX2(num_layers, 1);
+}
diff --git a/src/gallium/drivers/zink/zink_framebuffer.h b/src/gallium/drivers/zink/zink_framebuffer.h
index 4fb8bf67b90..d157be96ee5 100644
--- a/src/gallium/drivers/zink/zink_framebuffer.h
+++ b/src/gallium/drivers/zink/zink_framebuffer.h
@@ -95,4 +95,8 @@ zink_get_framebuffer_imageless(struct zink_context *ctx);
struct zink_framebuffer *
zink_get_framebuffer(struct zink_context *ctx);
+
+unsigned
+zink_framebuffer_get_num_layers(const struct pipe_framebuffer_state *fb);
+
#endif
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