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Diffstat (limited to 'src/gallium/drivers/i965/brw_wm_sampler_state.c')
-rw-r--r--src/gallium/drivers/i965/brw_wm_sampler_state.c228
1 files changed, 228 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
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index 00000000000..4e99ac703a9
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+++ b/src/gallium/drivers/i965/brw_wm_sampler_state.c
@@ -0,0 +1,228 @@
+/*
+ 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 "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 (pf_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,
+};
+
+
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