Mesa (master): i965: Fix uploading user vertex arrays with basevertex set.
Eric Anholt
anholt at kemper.freedesktop.org
Sun Nov 4 19:58:05 UTC 2012
Module: Mesa
Branch: master
Commit: 1e08d5452eaf80d63e626119142facc6c549a58e
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=1e08d5452eaf80d63e626119142facc6c549a58e
Author: Eric Anholt <eric at anholt.net>
Date: Wed Oct 31 13:39:26 2012 -0700
i965: Fix uploading user vertex arrays with basevertex set.
If the index buffer is full of values like "0 1 2 3", but basevertex is 4, we
need to upload at least vertex data for elements 4 5 6 7. Whether we also
upload 0 1 2 3 is a question of whether there are VBOs present or not -- see
the code setting start_vertex_bias in brw_draw_upload.c.
Fixes piglit draw-elements*base-vertex user_varrays
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
---
src/mesa/drivers/dri/i965/brw_context.h | 1 +
src/mesa/drivers/dri/i965/brw_draw.c | 4 ++++
src/mesa/drivers/dri/i965/brw_draw_upload.c | 4 ++--
3 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index 9fa4848..97556cb 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -1086,6 +1086,7 @@ struct brw_context
} prim_restart;
uint32_t num_instances;
+ int basevertex;
};
diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index 22d18f9..97a1077 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -478,6 +478,10 @@ static bool brw_try_draw_prims( struct gl_context *ctx,
brw->num_instances = prim->num_instances;
brw->state.dirty.brw |= BRW_NEW_VERTICES;
}
+ if (brw->basevertex != prim->basevertex) {
+ brw->basevertex = prim->basevertex;
+ brw->state.dirty.brw |= BRW_NEW_VERTICES;
+ }
if (intel->gen < 6)
brw_set_prim(brw, &prim[i]);
else
diff --git a/src/mesa/drivers/dri/i965/brw_draw_upload.c b/src/mesa/drivers/dri/i965/brw_draw_upload.c
index ad7fe7c..51531ce 100644
--- a/src/mesa/drivers/dri/i965/brw_draw_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_draw_upload.c
@@ -357,8 +357,8 @@ static void brw_prepare_vertices(struct brw_context *brw)
GLbitfield64 vs_inputs = brw->vs.prog_data->inputs_read;
const unsigned char *ptr = NULL;
GLuint interleaved = 0;
- unsigned int min_index = brw->vb.min_index;
- unsigned int max_index = brw->vb.max_index;
+ unsigned int min_index = brw->vb.min_index + brw->basevertex;
+ unsigned int max_index = brw->vb.max_index + brw->basevertex;
int delta, i, j;
struct brw_vertex_element *upload[VERT_ATTRIB_MAX];
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