diff options
Diffstat (limited to 'src/gallium/drivers/i965/brw_wm_sampler_state.c')
-rw-r--r-- | src/gallium/drivers/i965/brw_wm_sampler_state.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/brw_wm_sampler_state.c b/src/gallium/drivers/i965/brw_wm_sampler_state.c new file mode 100644 index 0000000000..a8bc31c9ce --- /dev/null +++ b/src/gallium/drivers/i965/brw_wm_sampler_state.c @@ -0,0 +1,229 @@ +/* + Copyright (C) Intel Corp. 2006. All Rights Reserved. + Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to + develop this 3D driver. + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice (including the + next paragraph) shall be included in all copies or substantial + portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE + LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + + **********************************************************************/ + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + */ + +#include "util/u_math.h" +#include "util/u_format.h" + +#include "brw_context.h" +#include "brw_state.h" +#include "brw_defines.h" +#include "brw_screen.h" + + +/* Samplers aren't strictly wm state from the hardware's perspective, + * but that is the only situation in which we use them in this driver. + */ + + + +static enum pipe_error +upload_default_color( struct brw_context *brw, + const GLfloat *color, + struct brw_winsys_buffer **bo_out ) +{ + struct brw_sampler_default_color sdc; + enum pipe_error ret; + + COPY_4V(sdc.color, color); + + ret = brw_cache_data( &brw->cache, BRW_SAMPLER_DEFAULT_COLOR, &sdc, + NULL, 0, bo_out ); + if (ret) + return ret; + + return PIPE_OK; +} + + +struct wm_sampler_key { + int sampler_count; + struct brw_sampler_state sampler[BRW_MAX_TEX_UNIT]; +}; + + +/** Sets up the cache key for sampler state for all texture units */ +static void +brw_wm_sampler_populate_key(struct brw_context *brw, + struct wm_sampler_key *key) +{ + int i; + + memset(key, 0, sizeof(*key)); + + key->sampler_count = MIN2(brw->curr.num_textures, + brw->curr.num_samplers); + + for (i = 0; i < key->sampler_count; i++) { + const struct brw_texture *tex = brw_texture(brw->curr.texture[i]); + const struct brw_sampler *sampler = brw->curr.sampler[i]; + struct brw_sampler_state *entry = &key->sampler[i]; + + entry->ss0 = sampler->ss0; + entry->ss1 = sampler->ss1; + entry->ss2.default_color_pointer = 0; /* reloc */ + entry->ss3 = sampler->ss3; + + /* Cube-maps on 965 and later must use the same wrap mode for all 3 + * coordinate dimensions. Futher, only CUBE and CLAMP are valid. + */ + if (tex->base.target == PIPE_TEXTURE_CUBE) { + if (FALSE && + (sampler->ss0.min_filter != BRW_MAPFILTER_NEAREST || + sampler->ss0.mag_filter != BRW_MAPFILTER_NEAREST)) { + entry->ss1.r_wrap_mode = BRW_TEXCOORDMODE_CUBE; + entry->ss1.s_wrap_mode = BRW_TEXCOORDMODE_CUBE; + entry->ss1.t_wrap_mode = BRW_TEXCOORDMODE_CUBE; + } else { + entry->ss1.r_wrap_mode = BRW_TEXCOORDMODE_CLAMP; + entry->ss1.s_wrap_mode = BRW_TEXCOORDMODE_CLAMP; + entry->ss1.t_wrap_mode = BRW_TEXCOORDMODE_CLAMP; + } + } else if (tex->base.target == PIPE_TEXTURE_1D) { + /* There's a bug in 1D texture sampling - it actually pays + * attention to the wrap_t value, though it should not. + * Override the wrap_t value here to GL_REPEAT to keep + * any nonexistent border pixels from floating in. + */ + entry->ss1.t_wrap_mode = BRW_TEXCOORDMODE_WRAP; + } + } +} + + +static enum pipe_error +brw_wm_sampler_update_default_colors(struct brw_context *brw) +{ + enum pipe_error ret; + int nr = MIN2(brw->curr.num_textures, + brw->curr.num_samplers); + int i; + + for (i = 0; i < nr; i++) { + const struct brw_texture *tex = brw_texture(brw->curr.texture[i]); + const struct brw_sampler *sampler = brw->curr.sampler[i]; + const float *bc; + + if (util_format_is_depth_or_stencil(tex->base.format)) { + float bordercolor[4] = { + sampler->border_color[0], + sampler->border_color[0], + sampler->border_color[0], + sampler->border_color[0] + }; + + bc = bordercolor; + } + else { + bc = sampler->border_color; + } + + /* GL specs that border color for depth textures is taken from the + * R channel, while the hardware uses A. Spam R into all the + * channels for safety. + */ + ret = upload_default_color(brw, + bc, + &brw->wm.sdc_bo[i]); + if (ret) + return ret; + } + + return PIPE_OK; +} + + + +/* All samplers must be uploaded in a single contiguous array. + */ +static int upload_wm_samplers( struct brw_context *brw ) +{ + struct wm_sampler_key key; + struct brw_winsys_reloc reloc[BRW_MAX_TEX_UNIT]; + enum pipe_error ret; + int i; + + brw_wm_sampler_update_default_colors(brw); + brw_wm_sampler_populate_key(brw, &key); + + if (brw->wm.sampler_count != key.sampler_count) { + brw->wm.sampler_count = key.sampler_count; + brw->state.dirty.cache |= CACHE_NEW_SAMPLER; + } + + if (brw->wm.sampler_count == 0) { + bo_reference(&brw->wm.sampler_bo, NULL); + return PIPE_OK; + } + + /* Emit SDC relocations */ + for (i = 0; i < key.sampler_count; i++) { + make_reloc( &reloc[i], + BRW_USAGE_SAMPLER, + 0, + i * sizeof(struct brw_sampler_state) + + offsetof(struct brw_sampler_state, ss2), + brw->wm.sdc_bo[i]); + } + + + if (brw_search_cache(&brw->cache, BRW_SAMPLER, + &key, sizeof(key), + reloc, key.sampler_count, + NULL, + &brw->wm.sampler_bo)) + return PIPE_OK; + + /* If we didnt find it in the cache, compute the state and put it in the + * cache. + */ + ret = brw_upload_cache(&brw->cache, BRW_SAMPLER, + &key, sizeof(key), + reloc, key.sampler_count, + &key.sampler, sizeof(key.sampler), + NULL, NULL, + &brw->wm.sampler_bo); + if (ret) + return ret; + + + return 0; +} + +const struct brw_tracked_state brw_wm_samplers = { + .dirty = { + .mesa = PIPE_NEW_BOUND_TEXTURES | PIPE_NEW_SAMPLERS, + .brw = 0, + .cache = 0 + }, + .prepare = upload_wm_samplers, +}; + + |