diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_sample_soa.c')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_sample_soa.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_sample_soa.c b/src/gallium/drivers/llvmpipe/lp_bld_sample_soa.c new file mode 100644 index 0000000000..3ca25b0e76 --- /dev/null +++ b/src/gallium/drivers/llvmpipe/lp_bld_sample_soa.c @@ -0,0 +1,411 @@ +/************************************************************************** + * + * 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 + * Texture sampling. + * + * @author Jose Fonseca <jfonseca@vmware.com> + */ + +#include "pipe/p_defines.h" +#include "pipe/p_state.h" +#include "util/u_debug.h" +#include "util/u_memory.h" +#include "util/u_math.h" +#include "util/u_format.h" +#include "lp_bld_debug.h" +#include "lp_bld_type.h" +#include "lp_bld_const.h" +#include "lp_bld_arit.h" +#include "lp_bld_logic.h" +#include "lp_bld_swizzle.h" +#include "lp_bld_format.h" +#include "lp_bld_sample.h" + + +void +lp_sampler_static_state(struct lp_sampler_static_state *state, + const struct pipe_texture *texture, + const struct pipe_sampler_state *sampler) +{ + memset(state, 0, sizeof *state); + + if(!texture) + return; + + if(!sampler) + return; + + state->format = texture->format; + state->target = texture->target; + state->pot_width = util_is_pot(texture->width[0]); + state->pot_height = util_is_pot(texture->height[0]); + state->pot_depth = util_is_pot(texture->depth[0]); + + state->wrap_s = sampler->wrap_s; + state->wrap_t = sampler->wrap_t; + state->wrap_r = sampler->wrap_r; + state->min_img_filter = sampler->min_img_filter; + state->min_mip_filter = sampler->min_mip_filter; + state->mag_img_filter = sampler->mag_img_filter; + if(sampler->compare_mode) { + state->compare_mode = sampler->compare_mode; + state->compare_func = sampler->compare_func; + } + state->normalized_coords = sampler->normalized_coords; + state->prefilter = sampler->prefilter; +} + + + +/** + * Keep all information for sampling code generation in a single place. + */ +struct lp_build_sample_context +{ + LLVMBuilderRef builder; + + const struct lp_sampler_static_state *static_state; + + struct lp_sampler_dynamic_state *dynamic_state; + + const struct util_format_description *format_desc; + + /** Incoming coordinates type and build context */ + union lp_type coord_type; + struct lp_build_context coord_bld; + + /** Integer coordinates */ + union lp_type int_coord_type; + struct lp_build_context int_coord_bld; + + /** Output texels type and build context */ + union lp_type texel_type; + struct lp_build_context texel_bld; +}; + + +static void +lp_build_sample_texel(struct lp_build_sample_context *bld, + LLVMValueRef x, + LLVMValueRef y, + LLVMValueRef y_stride, + LLVMValueRef data_ptr, + LLVMValueRef *texel) +{ + struct lp_build_context *int_coord_bld = &bld->int_coord_bld; + LLVMValueRef x_stride; + LLVMValueRef offset; + + x_stride = lp_build_const_scalar(bld->int_coord_type, bld->format_desc->block.bits/8); + + if(bld->format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) { + LLVMValueRef x_lo, x_hi; + LLVMValueRef y_lo, y_hi; + LLVMValueRef x_stride_lo, x_stride_hi; + LLVMValueRef y_stride_lo, y_stride_hi; + LLVMValueRef x_offset_lo, x_offset_hi; + LLVMValueRef y_offset_lo, y_offset_hi; + LLVMValueRef offset_lo, offset_hi; + + x_lo = LLVMBuildAnd(bld->builder, x, int_coord_bld->one, ""); + y_lo = LLVMBuildAnd(bld->builder, y, int_coord_bld->one, ""); + + x_hi = LLVMBuildLShr(bld->builder, x, int_coord_bld->one, ""); + y_hi = LLVMBuildLShr(bld->builder, y, int_coord_bld->one, ""); + + x_stride_lo = x_stride; + y_stride_lo = lp_build_const_scalar(bld->int_coord_type, 2*bld->format_desc->block.bits/8); + + x_stride_hi = lp_build_const_scalar(bld->int_coord_type, 4*bld->format_desc->block.bits/8); + y_stride_hi = LLVMBuildShl(bld->builder, y_stride, int_coord_bld->one, ""); + + x_offset_lo = lp_build_mul(int_coord_bld, x_lo, x_stride_lo); + y_offset_lo = lp_build_mul(int_coord_bld, y_lo, y_stride_lo); + offset_lo = lp_build_add(int_coord_bld, x_offset_lo, y_offset_lo); + + x_offset_hi = lp_build_mul(int_coord_bld, x_hi, x_stride_hi); + y_offset_hi = lp_build_mul(int_coord_bld, y_hi, y_stride_hi); + offset_hi = lp_build_add(int_coord_bld, x_offset_hi, y_offset_hi); + + offset = lp_build_add(int_coord_bld, offset_hi, offset_lo); + } + else { + LLVMValueRef x_offset; + LLVMValueRef y_offset; + + x_offset = lp_build_mul(int_coord_bld, x, x_stride); + y_offset = lp_build_mul(int_coord_bld, y, y_stride); + + offset = lp_build_add(int_coord_bld, x_offset, y_offset); + } + + lp_build_load_rgba_soa(bld->builder, + bld->format_desc, + bld->texel_type, + data_ptr, + offset, + texel); +} + + +static LLVMValueRef +lp_build_sample_wrap(struct lp_build_sample_context *bld, + LLVMValueRef coord, + LLVMValueRef length, + boolean is_pot, + unsigned wrap_mode) +{ + struct lp_build_context *int_coord_bld = &bld->int_coord_bld; + LLVMValueRef length_minus_one; + + length_minus_one = lp_build_sub(int_coord_bld, length, int_coord_bld->one); + + switch(wrap_mode) { + case PIPE_TEX_WRAP_REPEAT: + if(is_pot) + coord = LLVMBuildAnd(bld->builder, coord, length_minus_one, ""); + else + /* Signed remainder won't give the right results for negative + * dividends but unsigned remainder does.*/ + coord = LLVMBuildURem(bld->builder, coord, length, ""); + break; + + case PIPE_TEX_WRAP_CLAMP: + coord = lp_build_max(int_coord_bld, coord, int_coord_bld->zero); + coord = lp_build_min(int_coord_bld, coord, length_minus_one); + break; + + case PIPE_TEX_WRAP_CLAMP_TO_EDGE: + case PIPE_TEX_WRAP_CLAMP_TO_BORDER: + case PIPE_TEX_WRAP_MIRROR_REPEAT: + case PIPE_TEX_WRAP_MIRROR_CLAMP: + case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE: + case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER: + /* FIXME */ + default: + assert(0); + } + + return coord; +} + + +static void +lp_build_sample_2d_nearest_soa(struct lp_build_sample_context *bld, + LLVMValueRef s, + LLVMValueRef t, + LLVMValueRef width, + LLVMValueRef height, + LLVMValueRef stride, + LLVMValueRef data_ptr, + LLVMValueRef *texel) +{ + LLVMValueRef x; + LLVMValueRef y; + + x = lp_build_ifloor(&bld->coord_bld, s); + y = lp_build_ifloor(&bld->coord_bld, t); + + x = lp_build_sample_wrap(bld, x, width, bld->static_state->pot_width, bld->static_state->wrap_s); + y = lp_build_sample_wrap(bld, y, height, bld->static_state->pot_height, bld->static_state->wrap_t); + + lp_build_sample_texel(bld, x, y, stride, data_ptr, texel); +} + + +static void +lp_build_sample_2d_linear_soa(struct lp_build_sample_context *bld, + LLVMValueRef s, + LLVMValueRef t, + LLVMValueRef width, + LLVMValueRef height, + LLVMValueRef stride, + LLVMValueRef data_ptr, + LLVMValueRef *texel) +{ + LLVMValueRef half; + LLVMValueRef s_ipart; + LLVMValueRef t_ipart; + LLVMValueRef s_fpart; + LLVMValueRef t_fpart; + LLVMValueRef x0, x1; + LLVMValueRef y0, y1; + LLVMValueRef neighbors[2][2][4]; + unsigned chan; + + half = lp_build_const_scalar(bld->coord_type, 0.5); + s = lp_build_sub(&bld->coord_bld, s, half); + t = lp_build_sub(&bld->coord_bld, t, half); + + s_ipart = lp_build_floor(&bld->coord_bld, s); + t_ipart = lp_build_floor(&bld->coord_bld, t); + + s_fpart = lp_build_sub(&bld->coord_bld, s, s_ipart); + t_fpart = lp_build_sub(&bld->coord_bld, t, t_ipart); + + x0 = lp_build_int(&bld->coord_bld, s_ipart); + y0 = lp_build_int(&bld->coord_bld, t_ipart); + + x0 = lp_build_sample_wrap(bld, x0, width, bld->static_state->pot_width, bld->static_state->wrap_s); + y0 = lp_build_sample_wrap(bld, y0, height, bld->static_state->pot_height, bld->static_state->wrap_t); + + x1 = lp_build_add(&bld->int_coord_bld, x0, bld->int_coord_bld.one); + y1 = lp_build_add(&bld->int_coord_bld, y0, bld->int_coord_bld.one); + + x1 = lp_build_sample_wrap(bld, x1, width, bld->static_state->pot_width, bld->static_state->wrap_s); + y1 = lp_build_sample_wrap(bld, y1, height, bld->static_state->pot_height, bld->static_state->wrap_t); + + lp_build_sample_texel(bld, x0, y0, stride, data_ptr, neighbors[0][0]); + lp_build_sample_texel(bld, x1, y0, stride, data_ptr, neighbors[0][1]); + lp_build_sample_texel(bld, x0, y1, stride, data_ptr, neighbors[1][0]); + lp_build_sample_texel(bld, x1, y1, stride, data_ptr, neighbors[1][1]); + + /* TODO: Don't interpolate missing channels */ + for(chan = 0; chan < 4; ++chan) { + texel[chan] = lp_build_lerp_2d(&bld->texel_bld, + s_fpart, t_fpart, + neighbors[0][0][chan], + neighbors[0][1][chan], + neighbors[1][0][chan], + neighbors[1][1][chan]); + } +} + + +static void +lp_build_sample_compare(struct lp_build_sample_context *bld, + LLVMValueRef p, + LLVMValueRef *texel) +{ + struct lp_build_context *texel_bld = &bld->texel_bld; + LLVMValueRef res; + unsigned chan; + + if(!bld->static_state->compare_mode) + return; + + /* TODO: Compare before swizzling, to avoid redundant computations */ + res = NULL; + for(chan = 0; chan < 4; ++chan) { + LLVMValueRef cmp; + cmp = lp_build_cmp(texel_bld, bld->static_state->compare_func, p, texel[chan]); + cmp = lp_build_select(texel_bld, cmp, texel_bld->one, texel_bld->zero); + + if(res) + res = lp_build_add(texel_bld, res, cmp); + else + res = cmp; + } + + assert(res); + res = lp_build_mul(texel_bld, res, lp_build_const_scalar(texel_bld->type, 0.25)); + + /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */ + for(chan = 0; chan < 3; ++chan) + texel[chan] = res; + texel[3] = texel_bld->one; +} + + +void +lp_build_sample_soa(LLVMBuilderRef builder, + const struct lp_sampler_static_state *static_state, + struct lp_sampler_dynamic_state *dynamic_state, + union lp_type type, + unsigned unit, + unsigned num_coords, + const LLVMValueRef *coords, + LLVMValueRef lodbias, + LLVMValueRef *texel) +{ + struct lp_build_sample_context bld; + LLVMValueRef width; + LLVMValueRef height; + LLVMValueRef stride; + LLVMValueRef data_ptr; + LLVMValueRef s; + LLVMValueRef t; + LLVMValueRef p; + + /* Setup our build context */ + memset(&bld, 0, sizeof bld); + bld.builder = builder; + bld.static_state = static_state; + bld.dynamic_state = dynamic_state; + bld.format_desc = util_format_description(static_state->format); + bld.coord_type = type; + bld.int_coord_type = lp_int_type(type); + bld.texel_type = type; + lp_build_context_init(&bld.coord_bld, builder, bld.coord_type); + lp_build_context_init(&bld.int_coord_bld, builder, bld.int_coord_type); + lp_build_context_init(&bld.texel_bld, builder, bld.texel_type); + + /* Get the dynamic state */ + width = dynamic_state->width(dynamic_state, builder, unit); + height = dynamic_state->height(dynamic_state, builder, unit); + stride = dynamic_state->stride(dynamic_state, builder, unit); + data_ptr = dynamic_state->data_ptr(dynamic_state, builder, unit); + + s = coords[0]; + t = coords[1]; + p = coords[2]; + + width = lp_build_broadcast_scalar(&bld.int_coord_bld, width); + height = lp_build_broadcast_scalar(&bld.int_coord_bld, height); + stride = lp_build_broadcast_scalar(&bld.int_coord_bld, stride); + + if(static_state->target == PIPE_TEXTURE_1D) + t = bld.coord_bld.zero; + + if(static_state->normalized_coords) { + LLVMTypeRef coord_vec_type = lp_build_vec_type(bld.coord_type); + LLVMValueRef fp_width = LLVMBuildSIToFP(builder, width, coord_vec_type, ""); + LLVMValueRef fp_height = LLVMBuildSIToFP(builder, height, coord_vec_type, ""); + s = lp_build_mul(&bld.coord_bld, s, fp_width); + t = lp_build_mul(&bld.coord_bld, t, fp_height); + } + + switch (static_state->min_img_filter) { + case PIPE_TEX_FILTER_NEAREST: + lp_build_sample_2d_nearest_soa(&bld, s, t, width, height, stride, data_ptr, texel); + break; + case PIPE_TEX_FILTER_LINEAR: + case PIPE_TEX_FILTER_ANISO: + lp_build_sample_2d_linear_soa(&bld, s, t, width, height, stride, data_ptr, texel); + break; + default: + assert(0); + } + + /* FIXME: respect static_state->min_mip_filter */; + /* FIXME: respect static_state->mag_img_filter */; + /* FIXME: respect static_state->prefilter */; + + lp_build_sample_compare(&bld, p, texel); +} |