diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/intel/blorp/blorp.h | 12 | ||||
| -rw-r--r-- | src/intel/blorp/blorp_clear.c | 81 |
2 files changed, 93 insertions, 0 deletions
diff --git a/src/intel/blorp/blorp.h b/src/intel/blorp/blorp.h index 823475b6075..ff60567fc4e 100644 --- a/src/intel/blorp/blorp.h +++ b/src/intel/blorp/blorp.h @@ -155,8 +155,20 @@ blorp_clear_depth_stencil(struct blorp_batch *batch, uint32_t x0, uint32_t y0, uint32_t x1, uint32_t y1, bool clear_depth, float depth_value, uint8_t stencil_mask, uint8_t stencil_value); +bool +blorp_can_hiz_clear_depth(uint8_t gen, enum isl_format format, + uint32_t num_samples, + uint32_t x0, uint32_t y0, + uint32_t x1, uint32_t y1); void +blorp_gen8_hiz_clear_attachments(struct blorp_batch *batch, + uint32_t num_samples, + uint32_t x0, uint32_t y0, + uint32_t x1, uint32_t y1, + bool clear_depth, bool clear_stencil, + uint8_t stencil_value); +void blorp_clear_attachments(struct blorp_batch *batch, uint32_t binding_table_offset, enum isl_format depth_format, diff --git a/src/intel/blorp/blorp_clear.c b/src/intel/blorp/blorp_clear.c index d0904087214..afc505d86cf 100644 --- a/src/intel/blorp/blorp_clear.c +++ b/src/intel/blorp/blorp_clear.c @@ -470,6 +470,87 @@ blorp_clear_depth_stencil(struct blorp_batch *batch, } } +bool +blorp_can_hiz_clear_depth(uint8_t gen, enum isl_format format, + uint32_t num_samples, + uint32_t x0, uint32_t y0, uint32_t x1, uint32_t y1) +{ + /* This function currently doesn't support any gen prior to gen8 */ + assert(gen >= 8); + + if (gen == 8 && format == ISL_FORMAT_R16_UNORM) { + /* Apply the D16 alignment restrictions. On BDW, HiZ has an 8x4 sample + * block with the following property: as the number of samples increases, + * the number of pixels representable by this block decreases by a factor + * of the sample dimensions. Sample dimensions scale following the MSAA + * interleaved pattern. + * + * Sample|Sample|Pixel + * Count |Dim |Dim + * =================== + * 1 | 1x1 | 8x4 + * 2 | 2x1 | 4x4 + * 4 | 2x2 | 4x2 + * 8 | 4x2 | 2x2 + * 16 | 4x4 | 2x1 + * + * Table: Pixel Dimensions in a HiZ Sample Block Pre-SKL + */ + const struct isl_extent2d sa_block_dim = + isl_get_interleaved_msaa_px_size_sa(num_samples); + const uint8_t align_px_w = 8 / sa_block_dim.w; + const uint8_t align_px_h = 4 / sa_block_dim.h; + + /* Fast depth clears clear an entire sample block at a time. As a result, + * the rectangle must be aligned to the dimensions of the encompassing + * pixel block for a successful operation. + * + * Fast clears can still work if the upper-left corner is aligned and the + * bottom-rigtht corner touches the edge of a depth buffer whose extent + * is unaligned. This is because each miplevel in the depth buffer is + * padded by the Pixel Dim (similar to a standard compressed texture). + * In this case, the clear rectangle could be padded by to match the full + * depth buffer extent but to support multiple clearing techniques, we + * chose to be unaware of the depth buffer's extent and thus don't handle + * this case. + */ + if (x0 % align_px_w || y0 % align_px_h || + x1 % align_px_w || y1 % align_px_h) + return false; + } + return true; +} + +/* Given a depth stencil attachment, this function performs a fast depth clear + * on a depth portion and a regular clear on the stencil portion. When + * performing a fast depth clear on the depth portion, the HiZ buffer is simply + * tagged as cleared so the depth clear value is not actually needed. + */ +void +blorp_gen8_hiz_clear_attachments(struct blorp_batch *batch, + uint32_t num_samples, + uint32_t x0, uint32_t y0, + uint32_t x1, uint32_t y1, + bool clear_depth, bool clear_stencil, + uint8_t stencil_value) +{ + assert(batch->flags & BLORP_BATCH_NO_EMIT_DEPTH_STENCIL); + + struct blorp_params params; + blorp_params_init(¶ms); + params.num_layers = 1; + params.hiz_op = BLORP_HIZ_OP_DEPTH_CLEAR; + params.x0 = x0; + params.y0 = y0; + params.x1 = x1; + params.y1 = y1; + params.num_samples = num_samples; + params.depth.enabled = clear_depth; + params.stencil.enabled = clear_stencil; + params.stencil_ref = stencil_value; + batch->blorp->exec(batch, ¶ms); +} + /** Clear active color/depth/stencili attachments * * This function performs a clear operation on the currently bound |