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gallium/util: factor out primitive-restart rewriting logic 

Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5976>
This commit is contained in:
Erik Faye-Lund 2020-06-17 15:52:05 +02:00 committed by Marge Bot
parent b6ebf6eba9
commit 0c85d6c523
2 changed files with 38 additions and 26 deletions
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60
src/gallium/auxiliary/util/u_prim_restart.c
View File

@ -57,6 +57,38 @@ read_indirect_elements(struct pipe_context *context, struct pipe_draw_indirect_i
return ret;
}
void
util_translate_prim_restart_data(unsigned index_size,
void *src_map, void *dst_map,
unsigned count, unsigned restart_index)
{
if (index_size == 1) {
uint8_t *src = (uint8_t *) src_map;
uint16_t *dst = (uint16_t *) dst_map;
unsigned i;
for (i = 0; i < count; i++) {
dst[i] = (src[i] == restart_index) ? 0xffff : src[i];
}
}
else if (index_size == 2) {
uint16_t *src = (uint16_t *) src_map;
uint16_t *dst = (uint16_t *) dst_map;
unsigned i;
for (i = 0; i < count; i++) {
dst[i] = (src[i] == restart_index) ? 0xffff : src[i];
}
}
else {
uint32_t *src = (uint32_t *) src_map;
uint32_t *dst = (uint32_t *) dst_map;
unsigned i;
assert(index_size == 4);
for (i = 0; i < count; i++) {
dst[i] = (src[i] == restart_index) ? 0xffffffff : src[i];
}
}
}
/**
* Translate an index buffer for primitive restart.
* Create a new index buffer which is a copy of the original index buffer
@ -113,32 +145,8 @@ util_translate_prim_restart_ib(struct pipe_context *context,
if (!src_map)
goto error;
if (src_index_size == 1 && dst_index_size == 2) {
uint8_t *src = (uint8_t *) src_map;
uint16_t *dst = (uint16_t *) dst_map;
unsigned i;
for (i = 0; i < count; i++) {
dst[i] = (src[i] == info->restart_index) ? 0xffff : src[i];
}
}
else if (src_index_size == 2 && dst_index_size == 2) {
uint16_t *src = (uint16_t *) src_map;
uint16_t *dst = (uint16_t *) dst_map;
unsigned i;
for (i = 0; i < count; i++) {
dst[i] = (src[i] == info->restart_index) ? 0xffff : src[i];
}
}
else {
uint32_t *src = (uint32_t *) src_map;
uint32_t *dst = (uint32_t *) dst_map;
unsigned i;
assert(src_index_size == 4);
assert(dst_index_size == 4);
for (i = 0; i < count; i++) {
dst[i] = (src[i] == info->restart_index) ? 0xffffffff : src[i];
}
}
util_translate_prim_restart_data(src_index_size, src_map, dst_map,
info->count, info->restart_index);
if (src_transfer)
pipe_buffer_unmap(context, src_transfer);

4
src/gallium/auxiliary/util/u_prim_restart.h
View File

@ -41,6 +41,10 @@ struct pipe_draw_info;
union pipe_index_binding;
struct pipe_resource;
void
util_translate_prim_restart_data(unsigned index_size,
void *src_map, void *dst_map,
unsigned count, unsigned restart_index);
enum pipe_error
util_translate_prim_restart_ib(struct pipe_context *context,