diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_depth.c')
-rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_depth.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_depth.c b/src/gallium/auxiliary/gallivm/lp_bld_depth.c deleted file mode 100644 index f08f8eb6d8..0000000000 --- a/src/gallium/auxiliary/gallivm/lp_bld_depth.c +++ /dev/null @@ -1,213 +0,0 @@ -/************************************************************************** - * - * Copyright 2009 VMware, Inc. - * All Rights Reserved. - * - * 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, sub license, 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 NON-INFRINGEMENT. - * IN NO EVENT SHALL VMWARE 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. - * - **************************************************************************/ - -/** - * @file - * Depth/stencil testing to LLVM IR translation. - * - * To be done accurately/efficiently the depth/stencil test must be done with - * the same type/format of the depth/stencil buffer, which implies massaging - * the incoming depths to fit into place. Using a more straightforward - * type/format for depth/stencil values internally and only convert when - * flushing would avoid this, but it would most likely result in depth fighting - * artifacts. - * - * We are free to use a different pixel layout though. Since our basic - * processing unit is a quad (2x2 pixel block) we store the depth/stencil - * values tiled, a quad at time. That is, a depth buffer containing - * - * Z11 Z12 Z13 Z14 ... - * Z21 Z22 Z23 Z24 ... - * Z31 Z32 Z33 Z34 ... - * Z41 Z42 Z43 Z44 ... - * ... ... ... ... ... - * - * will actually be stored in memory as - * - * Z11 Z12 Z21 Z22 Z13 Z14 Z23 Z24 ... - * Z31 Z32 Z41 Z42 Z33 Z34 Z43 Z44 ... - * ... ... ... ... ... ... ... ... ... - * - * FIXME: Code generate stencil test - * - * @author Jose Fonseca <jfonseca@vmware.com> - */ - -#include "pipe/p_state.h" -#include "util/u_format.h" - -#include "lp_bld_type.h" -#include "lp_bld_const.h" -#include "lp_bld_logic.h" -#include "lp_bld_flow.h" -#include "lp_bld_debug.h" -#include "lp_bld_depth.h" - - -/** - * Return a type appropriate for depth/stencil testing. - */ -struct lp_type -lp_depth_type(const struct util_format_description *format_desc, - unsigned length) -{ - struct lp_type type; - unsigned swizzle; - - assert(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS); - assert(format_desc->block.width == 1); - assert(format_desc->block.height == 1); - - swizzle = format_desc->swizzle[0]; - assert(swizzle < 4); - - memset(&type, 0, sizeof type); - type.width = format_desc->block.bits; - - if(format_desc->channel[swizzle].type == UTIL_FORMAT_TYPE_FLOAT) { - type.floating = TRUE; - assert(swizzle == 0); - assert(format_desc->channel[swizzle].size == format_desc->block.bits); - } - else if(format_desc->channel[swizzle].type == UTIL_FORMAT_TYPE_UNSIGNED) { - assert(format_desc->block.bits <= 32); - if(format_desc->channel[swizzle].normalized) - type.norm = TRUE; - } - else - assert(0); - - assert(type.width <= length); - type.length = length / type.width; - - return type; -} - - -/** - * Depth test. - */ -void -lp_build_depth_test(LLVMBuilderRef builder, - const struct pipe_depth_state *state, - struct lp_type type, - const struct util_format_description *format_desc, - struct lp_build_mask_context *mask, - LLVMValueRef src, - LLVMValueRef dst_ptr) -{ - struct lp_build_context bld; - unsigned z_swizzle; - LLVMValueRef dst; - LLVMValueRef z_bitmask = NULL; - LLVMValueRef test; - - if(!state->enabled) - return; - - assert(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS); - assert(format_desc->block.width == 1); - assert(format_desc->block.height == 1); - - z_swizzle = format_desc->swizzle[0]; - if(z_swizzle == UTIL_FORMAT_SWIZZLE_NONE) - return; - - /* Sanity checking */ - assert(z_swizzle < 4); - assert(format_desc->block.bits == type.width); - if(type.floating) { - assert(z_swizzle == 0); - assert(format_desc->channel[z_swizzle].type == UTIL_FORMAT_TYPE_FLOAT); - assert(format_desc->channel[z_swizzle].size == format_desc->block.bits); - } - else { - assert(format_desc->channel[z_swizzle].type == UTIL_FORMAT_TYPE_UNSIGNED); - assert(format_desc->channel[z_swizzle].normalized); - assert(!type.fixed); - assert(!type.sign); - assert(type.norm); - } - - /* Setup build context */ - lp_build_context_init(&bld, builder, type); - - dst = LLVMBuildLoad(builder, dst_ptr, ""); - - lp_build_name(dst, "zsbuf"); - - /* Align the source depth bits with the destination's, and mask out any - * stencil or padding bits from both */ - if(format_desc->channel[z_swizzle].size == format_desc->block.bits) { - assert(z_swizzle == 0); - /* nothing to do */ - } - else { - unsigned padding_left; - unsigned padding_right; - unsigned chan; - - assert(format_desc->layout == UTIL_FORMAT_LAYOUT_PLAIN); - assert(format_desc->channel[z_swizzle].type == UTIL_FORMAT_TYPE_UNSIGNED); - assert(format_desc->channel[z_swizzle].size <= format_desc->block.bits); - assert(format_desc->channel[z_swizzle].normalized); - - padding_right = 0; - for(chan = 0; chan < z_swizzle; ++chan) - padding_right += format_desc->channel[chan].size; - padding_left = format_desc->block.bits - - (padding_right + format_desc->channel[z_swizzle].size); - - if(padding_left || padding_right) { - const unsigned long long mask_left = ((unsigned long long)1 << (format_desc->block.bits - padding_left)) - 1; - const unsigned long long mask_right = ((unsigned long long)1 << (padding_right)) - 1; - z_bitmask = lp_build_int_const_scalar(type, mask_left ^ mask_right); - } - - if(padding_left) - src = LLVMBuildLShr(builder, src, lp_build_int_const_scalar(type, padding_left), ""); - if(padding_right) - src = LLVMBuildAnd(builder, src, z_bitmask, ""); - if(padding_left || padding_right) - dst = LLVMBuildAnd(builder, dst, z_bitmask, ""); - } - - lp_build_name(dst, "zsbuf.z"); - - test = lp_build_cmp(&bld, state->func, src, dst); - lp_build_mask_update(mask, test); - - if(state->writemask) { - if(z_bitmask) - z_bitmask = LLVMBuildAnd(builder, mask->value, z_bitmask, ""); - else - z_bitmask = mask->value; - - dst = lp_build_select(&bld, z_bitmask, src, dst); - LLVMBuildStore(builder, dst, dst_ptr); - } -} |