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vbo: also map the immediate mode buffer for read 

because we read from it sometimes and we want cached reads.

We can only do it with the persistent mapping, because the non-persistent
mapping uses incompatible flags.

Reviewed-by: Mathias Fröhlich <mathias.froehlich@web.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3766>
This commit is contained in:
Marek Olšák 2020-01-31 20:50:42 -05:00 committed by Marge Bot
parent 27bd241103
commit ee5bd8638b
1 changed files with 8 additions and 2 deletions
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10
src/mesa/vbo/vbo_exec_draw.c
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@ -286,8 +286,13 @@ vbo_exec_vtx_map(struct vbo_exec_context *exec)
GL_MAP_UNSYNCHRONIZED_BIT;
if (ctx->Extensions.ARB_buffer_storage) {
/* We sometimes read from the buffer, so map it for read too.
* Only the persistent mapping can do that, because the non-persistent
* mapping uses flags that are incompatible with GL_MAP_READ_BIT.
*/
accessRange |= GL_MAP_PERSISTENT_BIT |
GL_MAP_COHERENT_BIT;
GL_MAP_COHERENT_BIT |
GL_MAP_READ_BIT;
} else {
accessRange |= GL_MAP_INVALIDATE_RANGE_BIT |
GL_MAP_FLUSH_EXPLICIT_BIT |
@ -328,7 +333,8 @@ vbo_exec_vtx_map(struct vbo_exec_context *exec)
GL_MAP_WRITE_BIT |
(ctx->Extensions.ARB_buffer_storage ?
GL_MAP_PERSISTENT_BIT |
GL_MAP_COHERENT_BIT : 0) |
GL_MAP_COHERENT_BIT |
GL_MAP_READ_BIT : 0) |
GL_DYNAMIC_STORAGE_BIT |
GL_CLIENT_STORAGE_BIT,
exec->vtx.bufferobj)) {