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gallium/util: add tight_format_check param to util_can_blit_via_copy_region()

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The VMware driver will use this for implementing GL_ARB_copy_image.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
This commit is contained in:
Brian Paul 2016-06-23 08:11:25 -06:00
parent a029d9f074
commit 5f1335878e
2 changed files with 30 additions and 11 deletions
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38
src/gallium/auxiliary/util/u_surface.c
View file

@ -687,19 +687,37 @@ get_sample_count(const struct pipe_resource *res)
}
/**
* Check if a blit() command can be implemented with a resource_copy_region().
* If tight_format_check is true, only allow the resource_copy_region() if
* the blit src/dst formats are identical, ignoring the resource formats.
* Otherwise, check for format casting and compatibility.
*/
boolean
util_can_blit_via_copy_region(const struct pipe_blit_info *blit)
util_can_blit_via_copy_region(const struct pipe_blit_info *blit,
boolean tight_format_check)
{
unsigned mask = util_format_get_mask(blit->dst.format);
const struct util_format_description *src_desc, *dst_desc;
/* No format conversions. */
if (blit->src.resource->format != blit->src.format ||
blit->dst.resource->format != blit->dst.format ||
!util_is_format_compatible(
util_format_description(blit->src.resource->format),
util_format_description(blit->dst.resource->format))) {
return FALSE;
src_desc = util_format_description(blit->src.resource->format);
dst_desc = util_format_description(blit->dst.resource->format);
if (tight_format_check) {
/* no format conversions allowed */
if (blit->src.format != blit->dst.format) {
return FALSE;
}
}
else {
/* do loose format compatibility checking */
if (blit->src.resource->format != blit->src.format ||
blit->dst.resource->format != blit->dst.format ||
!util_is_format_compatible(src_desc, dst_desc)) {
return FALSE;
}
}
unsigned mask = util_format_get_mask(blit->dst.format);
/* No masks, no filtering, no scissor, no blending */
if ((blit->mask & mask) != mask ||
@ -752,7 +770,7 @@ boolean
util_try_blit_via_copy_region(struct pipe_context *ctx,
const struct pipe_blit_info *blit)
{
if (util_can_blit_via_copy_region(blit)) {
if (util_can_blit_via_copy_region(blit, FALSE)) {
ctx->resource_copy_region(ctx, blit->dst.resource, blit->dst.level,
blit->dst.box.x, blit->dst.box.y,
blit->dst.box.z,

3
src/gallium/auxiliary/util/u_surface.h
View file

@ -99,7 +99,8 @@ util_clear_depth_stencil(struct pipe_context *pipe,
unsigned width, unsigned height);
boolean
util_can_blit_via_copy_region(const struct pipe_blit_info *blit);
util_can_blit_via_copy_region(const struct pipe_blit_info *blit,
boolean tight_format_check);
extern boolean
util_try_blit_via_copy_region(struct pipe_context *ctx,