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vbo: fix offset in minmax cache key

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Instead of saving primitive offset in the minmax cache key,
save the actual buffer offset which is used in the cache lookup.

Fixes rendering artifact seen with GoogleEarth when run with
VMware driver.

v2: Per Brian's comment, initialize offset to avoid compiler warning.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Charmaine Lee 2017-08-30 14:26:41 -07:00
parent 15b61dec94
commit 2d93b462b4
1 changed files with 5 additions and 3 deletions
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8
src/mesa/vbo/vbo_minmax_index.c
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@ -245,6 +245,7 @@ vbo_get_minmax_index(struct gl_context *ctx,
_mesa_primitive_restart_index(ctx, ib->index_size);
const char *indices;
GLuint i;
GLintptr offset = 0;
indices = (char *) ib->ptr + prim->start * ib->index_size;
if (_mesa_is_bufferobj(ib->obj)) {
@ -254,7 +255,8 @@ vbo_get_minmax_index(struct gl_context *ctx,
count, min_index, max_index))
return;
indices = ctx->Driver.MapBufferRange(ctx, (GLintptr) indices, size,
offset = indices;
indices = ctx->Driver.MapBufferRange(ctx, offset, size,
GL_MAP_READ_BIT, ib->obj,
MAP_INTERNAL);
}
@ -337,8 +339,8 @@ vbo_get_minmax_index(struct gl_context *ctx,
}
if (_mesa_is_bufferobj(ib->obj)) {
vbo_minmax_cache_store(ctx, ib->obj, ib->index_size, prim->start, count,
*min_index, *max_index);
vbo_minmax_cache_store(ctx, ib->obj, ib->index_size, offset,
count, *min_index, *max_index);
ctx->Driver.UnmapBuffer(ctx, ib->obj, MAP_INTERNAL);
}
}