Mesa (master): mesa: partially skip glPush/PopAttrib for MSAA textures and texture buffers
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Sat Jan 30 21:52:58 UTC 2021
Module: Mesa
Branch: master
Commit: 8706e97ffdd8d35bcbb3c9a3cd9858d61f95d08d
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=8706e97ffdd8d35bcbb3c9a3cd9858d61f95d08d
Author: Marek Olšák <marek.olsak at amd.com>
Date: Sat Dec 19 03:21:25 2020 -0500
mesa: partially skip glPush/PopAttrib for MSAA textures and texture buffers
This is based on the GL 4.6 Compatibility profile spec. Some fields just
don't have to be restored. This decreases CPU overhead.
Reviewed-by: Zoltán Böszörményi <zboszor at gmail.com>
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8181>
---
src/mesa/main/attrib.c | 38 ++++++++++++++++++++++++++++++++------
1 file changed, 32 insertions(+), 6 deletions(-)
diff --git a/src/mesa/main/attrib.c b/src/mesa/main/attrib.c
index 583dc518d42..82f7ed6ed10 100644
--- a/src/mesa/main/attrib.c
+++ b/src/mesa/main/attrib.c
@@ -63,6 +63,26 @@
#include "util/u_memory.h"
+static inline bool
+copy_texture_attribs(struct gl_texture_object *dst,
+ const struct gl_texture_object *src,
+ gl_texture_index tex)
+{
+ /* All pushed fields have no effect on texture buffers. */
+ if (tex == TEXTURE_BUFFER_INDEX)
+ return false;
+
+ /* Sampler fields have no effect on MSAA textures. */
+ if (tex != TEXTURE_2D_MULTISAMPLE_INDEX &&
+ tex != TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX) {
+ memcpy(&dst->Sampler.Attrib, &src->Sampler.Attrib,
+ sizeof(src->Sampler.Attrib));
+ }
+ memcpy(&dst->Attrib, &src->Attrib, sizeof(src->Attrib));
+ return true;
+}
+
+
void GLAPIENTRY
_mesa_PushAttrib(GLbitfield mask)
{
@@ -251,8 +271,8 @@ _mesa_PushAttrib(GLbitfield mask)
struct gl_texture_object *src = ctx->Texture.Unit[u].CurrentTex[tex];
dst->Name = src->Name;
- memcpy(&dst->Sampler.Attrib, &src->Sampler.Attrib, sizeof(src->Sampler.Attrib));
- memcpy(&dst->Attrib, &src->Attrib, sizeof(src->Attrib));
+
+ copy_texture_attribs(dst, src, tex);
}
}
@@ -594,8 +614,15 @@ pop_texture_group(struct gl_context *ctx, struct gl_texture_attrib_node *texstat
const struct gl_texture_object *savedObj = &texstate->SavedObj[u][tgt];
struct gl_texture_object *texObj =
_mesa_get_tex_unit(ctx, u)->CurrentTex[tgt];
+ bool is_msaa = tgt == TEXTURE_2D_MULTISAMPLE_INDEX ||
+ tgt == TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX;
- if (texObj->Name != savedObj->Name) {
+ /* According to the OpenGL 4.6 Compatibility Profile specification,
+ * table 23.17, GL_TEXTURE_BINDING_2D_MULTISAMPLE and
+ * GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY do not belong in the
+ * texture attrib group.
+ */
+ if (!is_msaa && texObj->Name != savedObj->Name) {
/* We don't need to check whether the texture target is supported,
* because we wouldn't get in this conditional block if it wasn't.
*/
@@ -603,9 +630,8 @@ pop_texture_group(struct gl_context *ctx, struct gl_texture_attrib_node *texstat
texObj = _mesa_get_tex_unit(ctx, u)->CurrentTex[tgt];
}
- memcpy(&texObj->Sampler.Attrib, &savedObj->Sampler.Attrib,
- sizeof(savedObj->Sampler.Attrib));
- memcpy(&texObj->Attrib, &savedObj->Attrib, sizeof(savedObj->Attrib));
+ if (!copy_texture_attribs(texObj, savedObj, tgt))
+ continue;
/* GL_ALL_ATTRIB_BITS means all pnames. (internal) */
if (texObj->Name != 0 && ctx->Driver.TexParameter)
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