/************************************************************************** * * 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 -- SoA. * * @author Jose Fonseca */ #include "pipe/p_defines.h" #include "pipe/p_state.h" #include "util/u_debug.h" #include "util/u_dump.h" #include "util/u_memory.h" #include "util/u_math.h" #include "util/u_format.h" #include "util/u_cpu_detect.h" #include "lp_bld_debug.h" #include "lp_bld_type.h" #include "lp_bld_const.h" #include "lp_bld_conv.h" #include "lp_bld_arit.h" #include "lp_bld_logic.h" #include "lp_bld_swizzle.h" #include "lp_bld_pack.h" #include "lp_bld_format.h" #include "lp_bld_sample.h" /** * 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; /** regular scalar float type */ struct lp_type float_type; struct lp_build_context float_bld; /** regular scalar float type */ struct lp_type int_type; struct lp_build_context int_bld; /** Incoming coordinates type and build context */ struct lp_type coord_type; struct lp_build_context coord_bld; /** Unsigned integer coordinates */ struct lp_type uint_coord_type; struct lp_build_context uint_coord_bld; /** Signed integer coordinates */ struct lp_type int_coord_type; struct lp_build_context int_coord_bld; /** Output texels type and build context */ struct lp_type texel_type; struct lp_build_context texel_bld; }; /** * Does the given texture wrap mode allow sampling the texture border color? * XXX maybe move this into gallium util code. */ static boolean wrap_mode_uses_border_color(unsigned mode) { switch (mode) { case PIPE_TEX_WRAP_REPEAT: case PIPE_TEX_WRAP_CLAMP_TO_EDGE: case PIPE_TEX_WRAP_MIRROR_REPEAT: case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE: return FALSE; case PIPE_TEX_WRAP_CLAMP: case PIPE_TEX_WRAP_CLAMP_TO_BORDER: case PIPE_TEX_WRAP_MIRROR_CLAMP: case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER: return TRUE; default: assert(0 && "unexpected wrap mode"); return FALSE; } } static LLVMValueRef lp_build_get_mipmap_level(struct lp_build_sample_context *bld, LLVMValueRef data_array, LLVMValueRef level) { LLVMValueRef indexes[2], data_ptr; indexes[0] = LLVMConstInt(LLVMInt32Type(), 0, 0); indexes[1] = level; data_ptr = LLVMBuildGEP(bld->builder, data_array, indexes, 2, ""); data_ptr = LLVMBuildLoad(bld->builder, data_ptr, ""); return data_ptr; } static LLVMValueRef lp_build_get_const_mipmap_level(struct lp_build_sample_context *bld, LLVMValueRef data_array, int level) { LLVMValueRef lvl = LLVMConstInt(LLVMInt32Type(), level, 0); return lp_build_get_mipmap_level(bld, data_array, lvl); } /** * Gen code to fetch a texel from a texture at int coords (x, y). * The result, texel, will be: * texel[0] = red values * texel[1] = green values * texel[2] = blue values * texel[3] = alpha values */ static void lp_build_sample_texel_soa(struct lp_build_sample_context *bld, LLVMValueRef width, LLVMValueRef height, LLVMValueRef x, LLVMValueRef y, LLVMValueRef y_stride, LLVMValueRef data_ptr, LLVMValueRef *texel) { struct lp_build_context *int_coord_bld = &bld->int_coord_bld; LLVMValueRef offset; LLVMValueRef packed; LLVMValueRef use_border = NULL; /* use_border = x < 0 || x >= width || y < 0 || y >= height */ if (wrap_mode_uses_border_color(bld->static_state->wrap_s)) { LLVMValueRef b1, b2; b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, x, int_coord_bld->zero); b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, x, width); use_border = LLVMBuildOr(bld->builder, b1, b2, "b1_or_b2"); } if (wrap_mode_uses_border_color(bld->static_state->wrap_t)) { LLVMValueRef b1, b2; b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, y, int_coord_bld->zero); b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, y, height); if (use_border) { use_border = LLVMBuildOr(bld->builder, use_border, b1, "ub_or_b1"); use_border = LLVMBuildOr(bld->builder, use_border, b2, "ub_or_b2"); } else { use_border = LLVMBuildOr(bld->builder, b1, b2, "b1_or_b2"); } } /* * Note: if we find an app which frequently samples the texture border * we might want to implement a true conditional here to avoid sampling * the texture whenever possible (since that's quite a bit of code). * Ex: * if (use_border) { * texel = border_color; * } * else { * texel = sample_texture(coord); * } * As it is now, we always sample the texture, then selectively replace * the texel color results with the border color. */ /* convert x,y coords to linear offset from start of texture, in bytes */ offset = lp_build_sample_offset(&bld->uint_coord_bld, bld->format_desc, x, y, y_stride); assert(bld->format_desc->block.width == 1); assert(bld->format_desc->block.height == 1); assert(bld->format_desc->block.bits <= bld->texel_type.width); /* gather the texels from the texture */ packed = lp_build_gather(bld->builder, bld->texel_type.length, bld->format_desc->block.bits, bld->texel_type.width, data_ptr, offset); /* convert texels to float rgba */ lp_build_unpack_rgba_soa(bld->builder, bld->format_desc, bld->texel_type, packed, texel); if (use_border) { /* select texel color or border color depending on use_border */ int chan; for (chan = 0; chan < 4; chan++) { LLVMValueRef border_chan = lp_build_const_scalar(bld->texel_type, bld->static_state->border_color[chan]); texel[chan] = lp_build_select(&bld->texel_bld, use_border, border_chan, texel[chan]); } } } static LLVMValueRef lp_build_sample_packed(struct lp_build_sample_context *bld, LLVMValueRef x, LLVMValueRef y, LLVMValueRef y_stride, LLVMValueRef data_array) { LLVMValueRef offset; LLVMValueRef data_ptr; offset = lp_build_sample_offset(&bld->uint_coord_bld, bld->format_desc, x, y, y_stride); assert(bld->format_desc->block.width == 1); assert(bld->format_desc->block.height == 1); assert(bld->format_desc->block.bits <= bld->texel_type.width); /* get pointer to mipmap level 0 data */ data_ptr = lp_build_get_const_mipmap_level(bld, data_array, 0); return lp_build_gather(bld->builder, bld->texel_type.length, bld->format_desc->block.bits, bld->texel_type.width, data_ptr, offset); } /** * Helper to compute the mirror function for the PIPE_WRAP_MIRROR modes. */ static LLVMValueRef lp_build_coord_mirror(struct lp_build_sample_context *bld, LLVMValueRef coord) { struct lp_build_context *coord_bld = &bld->coord_bld; struct lp_build_context *int_coord_bld = &bld->int_coord_bld; LLVMValueRef fract, flr, isOdd; /* fract = coord - floor(coord) */ fract = lp_build_sub(coord_bld, coord, lp_build_floor(coord_bld, coord)); /* flr = ifloor(coord); */ flr = lp_build_ifloor(coord_bld, coord); /* isOdd = flr & 1 */ isOdd = LLVMBuildAnd(bld->builder, flr, int_coord_bld->one, ""); /* make coord positive or negative depending on isOdd */ coord = lp_build_set_sign(coord_bld, fract, isOdd); /* convert isOdd to float */ isOdd = lp_build_int_to_float(coord_bld, isOdd); /* add isOdd to coord */ coord = lp_build_add(coord_bld, coord, isOdd); return coord; } /** * We only support a few wrap modes in lp_build_sample_wrap_int() at this time. * Return whether the given mode is supported by that function. */ static boolean is_simple_wrap_mode(unsigned mode) { switch (mode) { case PIPE_TEX_WRAP_REPEAT: case PIPE_TEX_WRAP_CLAMP: case PIPE_TEX_WRAP_CLAMP_TO_EDGE: return TRUE; case PIPE_TEX_WRAP_CLAMP_TO_BORDER: default: return FALSE; } } /** * Build LLVM code for texture wrap mode, for scaled integer texcoords. * \param coord the incoming texcoord (s,t,r or q) scaled to the texture size * \param length the texture size along one dimension * \param is_pot if TRUE, length is a power of two * \param wrap_mode one of PIPE_TEX_WRAP_x */ static LLVMValueRef lp_build_sample_wrap_int(struct lp_build_sample_context *bld, LLVMValueRef coord, LLVMValueRef length, boolean is_pot, unsigned wrap_mode) { struct lp_build_context *uint_coord_bld = &bld->uint_coord_bld; struct lp_build_context *int_coord_bld = &bld->int_coord_bld; LLVMValueRef length_minus_one; length_minus_one = lp_build_sub(uint_coord_bld, length, uint_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: case PIPE_TEX_WRAP_CLAMP_TO_EDGE: case PIPE_TEX_WRAP_CLAMP_TO_BORDER: 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_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 */ _debug_printf("llvmpipe: failed to translate texture wrap mode %s\n", util_dump_tex_wrap(wrap_mode, TRUE)); coord = lp_build_max(uint_coord_bld, coord, uint_coord_bld->zero); coord = lp_build_min(uint_coord_bld, coord, length_minus_one); break; default: assert(0); } return coord; } /** * Build LLVM code for texture wrap mode for linear filtering. * \param x0_out returns first integer texcoord * \param x1_out returns second integer texcoord * \param weight_out returns linear interpolation weight */ static void lp_build_sample_wrap_linear(struct lp_build_sample_context *bld, LLVMValueRef coord, LLVMValueRef length, boolean is_pot, unsigned wrap_mode, LLVMValueRef *x0_out, LLVMValueRef *x1_out, LLVMValueRef *weight_out) { struct lp_build_context *coord_bld = &bld->coord_bld; struct lp_build_context *int_coord_bld = &bld->int_coord_bld; struct lp_build_context *uint_coord_bld = &bld->uint_coord_bld; LLVMValueRef two = lp_build_const_scalar(coord_bld->type, 2.0); LLVMValueRef half = lp_build_const_scalar(coord_bld->type, 0.5); LLVMValueRef length_f = lp_build_int_to_float(coord_bld, length); LLVMValueRef length_minus_one = lp_build_sub(uint_coord_bld, length, uint_coord_bld->one); LLVMValueRef length_f_minus_one = lp_build_sub(coord_bld, length_f, coord_bld->one); LLVMValueRef coord0, coord1, weight; switch(wrap_mode) { case PIPE_TEX_WRAP_REPEAT: /* mul by size and subtract 0.5 */ coord = lp_build_mul(coord_bld, coord, length_f); coord = lp_build_sub(coord_bld, coord, half); /* convert to int */ coord0 = lp_build_ifloor(coord_bld, coord); coord1 = lp_build_add(uint_coord_bld, coord0, uint_coord_bld->one); /* compute lerp weight */ weight = lp_build_fract(coord_bld, coord); /* repeat wrap */ if (is_pot) { coord0 = LLVMBuildAnd(bld->builder, coord0, length_minus_one, ""); coord1 = LLVMBuildAnd(bld->builder, coord1, length_minus_one, ""); } else { /* Signed remainder won't give the right results for negative * dividends but unsigned remainder does.*/ coord0 = LLVMBuildURem(bld->builder, coord0, length, ""); coord1 = LLVMBuildURem(bld->builder, coord1, length, ""); } break; case PIPE_TEX_WRAP_CLAMP: if (bld->static_state->normalized_coords) { coord = lp_build_mul(coord_bld, coord, length_f); } weight = lp_build_fract(coord_bld, coord); coord0 = lp_build_clamp(coord_bld, coord, coord_bld->zero, length_f_minus_one); coord1 = lp_build_add(coord_bld, coord, coord_bld->one); coord1 = lp_build_clamp(coord_bld, coord1, coord_bld->zero, length_f_minus_one); coord0 = lp_build_ifloor(coord_bld, coord0); coord1 = lp_build_ifloor(coord_bld, coord1); break; case PIPE_TEX_WRAP_CLAMP_TO_EDGE: if (bld->static_state->normalized_coords) { /* clamp to [0,1] */ coord = lp_build_clamp(coord_bld, coord, coord_bld->zero, coord_bld->one); /* mul by tex size and subtract 0.5 */ coord = lp_build_mul(coord_bld, coord, length_f); coord = lp_build_sub(coord_bld, coord, half); } else { LLVMValueRef min, max; /* clamp to [0.5, length - 0.5] */ min = lp_build_const_scalar(coord_bld->type, 0.5F); max = lp_build_sub(coord_bld, length_f, min); coord = lp_build_clamp(coord_bld, coord, min, max); } /* compute lerp weight */ weight = lp_build_fract(coord_bld, coord); /* coord0 = floor(coord); */ coord0 = lp_build_ifloor(coord_bld, coord); coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one); /* coord0 = max(coord0, 0) */ coord0 = lp_build_max(int_coord_bld, coord0, int_coord_bld->zero); /* coord1 = min(coord1, length-1) */ coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one); break; case PIPE_TEX_WRAP_CLAMP_TO_BORDER: { LLVMValueRef min, max; if (bld->static_state->normalized_coords) { /* min = -1.0 / (2 * length) = -0.5 / length */ min = lp_build_mul(coord_bld, lp_build_const_scalar(coord_bld->type, -0.5F), lp_build_rcp(coord_bld, length_f)); /* max = 1.0 - min */ max = lp_build_sub(coord_bld, coord_bld->one, min); /* coord = clamp(coord, min, max) */ coord = lp_build_clamp(coord_bld, coord, min, max); /* scale coord to length (and sub 0.5?) */ coord = lp_build_mul(coord_bld, coord, length_f); coord = lp_build_sub(coord_bld, coord, half); } else { /* clamp to [-0.5, length + 0.5] */ min = lp_build_const_scalar(coord_bld->type, -0.5F); max = lp_build_sub(coord_bld, length_f, min); coord = lp_build_clamp(coord_bld, coord, min, max); coord = lp_build_sub(coord_bld, coord, half); } /* compute lerp weight */ weight = lp_build_fract(coord_bld, coord); /* convert to int */ coord0 = lp_build_ifloor(coord_bld, coord); coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one); } break; case PIPE_TEX_WRAP_MIRROR_REPEAT: /* compute mirror function */ coord = lp_build_coord_mirror(bld, coord); /* scale coord to length */ coord = lp_build_mul(coord_bld, coord, length_f); coord = lp_build_sub(coord_bld, coord, half); /* compute lerp weight */ weight = lp_build_fract(coord_bld, coord); /* convert to int coords */ coord0 = lp_build_ifloor(coord_bld, coord); coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one); /* coord0 = max(coord0, 0) */ coord0 = lp_build_max(int_coord_bld, coord0, int_coord_bld->zero); /* coord1 = min(coord1, length-1) */ coord1 = lp_build_min(int_coord_bld, coord1, length_minus_one); break; case PIPE_TEX_WRAP_MIRROR_CLAMP: { LLVMValueRef min, max; /* min = 1.0 / (2 * length) */ min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f)); /* max = 1.0 - min */ max = lp_build_sub(coord_bld, coord_bld->one, min); coord = lp_build_abs(coord_bld, coord); coord = lp_build_clamp(coord_bld, coord, min, max); coord = lp_build_mul(coord_bld, coord, length_f); if(0)coord = lp_build_sub(coord_bld, coord, half); weight = lp_build_fract(coord_bld, coord); coord0 = lp_build_ifloor(coord_bld, coord); coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one); } break; case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE: { LLVMValueRef min, max; /* min = 1.0 / (2 * length) */ min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f)); /* max = 1.0 - min */ max = lp_build_sub(coord_bld, coord_bld->one, min); coord = lp_build_abs(coord_bld, coord); coord = lp_build_clamp(coord_bld, coord, min, max); coord = lp_build_mul(coord_bld, coord, length_f); coord = lp_build_sub(coord_bld, coord, half); weight = lp_build_fract(coord_bld, coord); coord0 = lp_build_ifloor(coord_bld, coord); coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one); } break; case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER: { LLVMValueRef min, max; /* min = -1.0 / (2 * length) = -0.5 / length */ min = lp_build_mul(coord_bld, lp_build_const_scalar(coord_bld->type, -0.5F), lp_build_rcp(coord_bld, length_f)); /* max = 1.0 - min */ max = lp_build_sub(coord_bld, coord_bld->one, min); coord = lp_build_abs(coord_bld, coord); coord = lp_build_clamp(coord_bld, coord, min, max); coord = lp_build_mul(coord_bld, coord, length_f); coord = lp_build_sub(coord_bld, coord, half); weight = lp_build_fract(coord_bld, coord); coord0 = lp_build_ifloor(coord_bld, coord); coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one); } break; default: assert(0); coord0 = NULL; coord1 = NULL; weight = NULL; } *x0_out = coord0; *x1_out = coord1; *weight_out = weight; } /** * Build LLVM code for texture wrap mode for nearest filtering. * \param coord the incoming texcoord (nominally in [0,1]) * \param length the texture size along one dimension, as int * \param is_pot if TRUE, length is a power of two * \param wrap_mode one of PIPE_TEX_WRAP_x */ static LLVMValueRef lp_build_sample_wrap_nearest(struct lp_build_sample_context *bld, LLVMValueRef coord, LLVMValueRef length, boolean is_pot, unsigned wrap_mode) { struct lp_build_context *coord_bld = &bld->coord_bld; struct lp_build_context *int_coord_bld = &bld->int_coord_bld; struct lp_build_context *uint_coord_bld = &bld->uint_coord_bld; LLVMValueRef two = lp_build_const_scalar(coord_bld->type, 2.0); LLVMValueRef length_f = lp_build_int_to_float(coord_bld, length); LLVMValueRef length_minus_one = lp_build_sub(uint_coord_bld, length, uint_coord_bld->one); LLVMValueRef length_f_minus_one = lp_build_sub(coord_bld, length_f, coord_bld->one); LLVMValueRef icoord; switch(wrap_mode) { case PIPE_TEX_WRAP_REPEAT: coord = lp_build_mul(coord_bld, coord, length_f); icoord = lp_build_ifloor(coord_bld, coord); if (is_pot) icoord = LLVMBuildAnd(bld->builder, icoord, length_minus_one, ""); else /* Signed remainder won't give the right results for negative * dividends but unsigned remainder does.*/ icoord = LLVMBuildURem(bld->builder, icoord, length, ""); break; case PIPE_TEX_WRAP_CLAMP: /* mul by size */ if (bld->static_state->normalized_coords) { coord = lp_build_mul(coord_bld, coord, length_f); } /* floor */ icoord = lp_build_ifloor(coord_bld, coord); /* clamp to [0, size-1]. Note: int coord builder type */ icoord = lp_build_clamp(int_coord_bld, icoord, int_coord_bld->zero, length_minus_one); break; case PIPE_TEX_WRAP_CLAMP_TO_EDGE: { LLVMValueRef min, max; if (bld->static_state->normalized_coords) { /* min = 1.0 / (2 * length) */ min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f)); /* max = length - min */ max = lp_build_sub(coord_bld, length_f, min); /* scale coord to length */ coord = lp_build_mul(coord_bld, coord, length_f); } else { /* clamp to [0.5, length - 0.5] */ min = lp_build_const_scalar(coord_bld->type, 0.5F); max = lp_build_sub(coord_bld, length_f, min); } /* coord = clamp(coord, min, max) */ coord = lp_build_clamp(coord_bld, coord, min, max); icoord = lp_build_ifloor(coord_bld, coord); } break; case PIPE_TEX_WRAP_CLAMP_TO_BORDER: /* Note: this is the same as CLAMP_TO_EDGE, except min = -min */ { LLVMValueRef min, max; if (bld->static_state->normalized_coords) { /* min = -1.0 / (2 * length) = -0.5 / length */ min = lp_build_mul(coord_bld, lp_build_const_scalar(coord_bld->type, -0.5F), lp_build_rcp(coord_bld, length_f)); /* max = length - min */ max = lp_build_sub(coord_bld, length_f, min); /* scale coord to length */ coord = lp_build_mul(coord_bld, coord, length_f); } else { /* clamp to [-0.5, length + 0.5] */ min = lp_build_const_scalar(coord_bld->type, -0.5F); max = lp_build_sub(coord_bld, length_f, min); } /* coord = clamp(coord, min, max) */ coord = lp_build_clamp(coord_bld, coord, min, max); icoord = lp_build_ifloor(coord_bld, coord); } break; case PIPE_TEX_WRAP_MIRROR_REPEAT: { LLVMValueRef min, max; /* min = 1.0 / (2 * length) */ min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f)); /* max = length - min */ max = lp_build_sub(coord_bld, length_f, min); /* compute mirror function */ coord = lp_build_coord_mirror(bld, coord); /* scale coord to length */ coord = lp_build_mul(coord_bld, coord, length_f); /* coord = clamp(coord, min, max) */ coord = lp_build_clamp(coord_bld, coord, min, max); icoord = lp_build_ifloor(coord_bld, coord); } break; case PIPE_TEX_WRAP_MIRROR_CLAMP: coord = lp_build_abs(coord_bld, coord); coord = lp_build_mul(coord_bld, coord, length_f); coord = lp_build_clamp(coord_bld, coord, coord_bld->zero, length_f_minus_one); icoord = lp_build_ifloor(coord_bld, coord); break; case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE: { LLVMValueRef min, max; /* min = 1.0 / (2 * length) */ min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f)); /* max = length - min */ max = lp_build_sub(coord_bld, length_f, min); coord = lp_build_abs(coord_bld, coord); coord = lp_build_mul(coord_bld, coord, length_f); coord = lp_build_clamp(coord_bld, coord, min, max); icoord = lp_build_ifloor(coord_bld, coord); } break; case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER: { LLVMValueRef min, max; /* min = 1.0 / (2 * length) */ min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f)); min = lp_build_negate(coord_bld, min); /* max = length - min */ max = lp_build_sub(coord_bld, length_f, min); coord = lp_build_abs(coord_bld, coord); coord = lp_build_mul(coord_bld, coord, length_f); coord = lp_build_clamp(coord_bld, coord, min, max); icoord = lp_build_ifloor(coord_bld, coord); } break; default: assert(0); icoord = NULL; } return icoord; } /** * Codegen equivalent for u_minify(). * Return max(1, base_size >> level); */ static LLVMValueRef lp_build_minify(struct lp_build_sample_context *bld, LLVMValueRef base_size, LLVMValueRef level) { LLVMValueRef size = LLVMBuildAShr(bld->builder, base_size, level, "minify"); size = lp_build_max(&bld->int_coord_bld, size, bld->int_coord_bld.one); return size; } static int texture_dims(enum pipe_texture_target tex) { switch (tex) { case PIPE_TEXTURE_1D: return 1; case PIPE_TEXTURE_2D: case PIPE_TEXTURE_CUBE: return 2; case PIPE_TEXTURE_3D: return 3; default: assert(0 && "bad texture target in texture_dims()"); return 2; } } /** * Generate code to compute texture level of detail (lambda). * \param s vector of texcoord s values * \param t vector of texcoord t values * \param r vector of texcoord r values * \param width scalar int texture width * \param height scalar int texture height * \param depth scalar int texture depth */ static LLVMValueRef lp_build_lod_selector(struct lp_build_sample_context *bld, LLVMValueRef s, LLVMValueRef t, LLVMValueRef r, LLVMValueRef width, LLVMValueRef height, LLVMValueRef depth) { const int dims = texture_dims(bld->static_state->target); struct lp_build_context *coord_bld = &bld->coord_bld; struct lp_build_context *float_bld = &bld->float_bld; LLVMValueRef lod_bias = LLVMConstReal(LLVMFloatType(), bld->static_state->lod_bias); LLVMValueRef min_lod = LLVMConstReal(LLVMFloatType(), bld->static_state->min_lod); LLVMValueRef max_lod = LLVMConstReal(LLVMFloatType(), bld->static_state->max_lod); LLVMValueRef index0 = LLVMConstInt(LLVMInt32Type(), 0, 0); LLVMValueRef index1 = LLVMConstInt(LLVMInt32Type(), 1, 0); LLVMValueRef index2 = LLVMConstInt(LLVMInt32Type(), 2, 0); LLVMValueRef s0, s1, s2; LLVMValueRef t0, t1, t2; LLVMValueRef r0, r1, r2; LLVMValueRef dsdx, dsdy, dtdx, dtdy, drdx, drdy; LLVMValueRef rho, lod; /* * dsdx = abs(s[1] - s[0]); * dsdy = abs(s[2] - s[0]); * dtdx = abs(t[1] - t[0]); * dtdy = abs(t[2] - t[0]); * drdx = abs(r[1] - r[0]); * drdy = abs(r[2] - r[0]); * XXX we're assuming a four-element quad in 2x2 layout here. */ s0 = LLVMBuildExtractElement(bld->builder, s, index0, "s0"); s1 = LLVMBuildExtractElement(bld->builder, s, index1, "s1"); s2 = LLVMBuildExtractElement(bld->builder, s, index2, "s2"); dsdx = LLVMBuildSub(bld->builder, s1, s0, ""); dsdx = lp_build_abs(float_bld, dsdx); dsdy = LLVMBuildSub(bld->builder, s2, s0, ""); dsdy = lp_build_abs(float_bld, dsdy); if (dims > 1) { t0 = LLVMBuildExtractElement(bld->builder, t, index0, "t0"); t1 = LLVMBuildExtractElement(bld->builder, t, index1, "t1"); t2 = LLVMBuildExtractElement(bld->builder, t, index2, "t2"); dtdx = LLVMBuildSub(bld->builder, t1, t0, ""); dtdx = lp_build_abs(float_bld, dtdx); dtdy = LLVMBuildSub(bld->builder, t2, t0, ""); dtdy = lp_build_abs(float_bld, dtdy); if (dims > 2) { r0 = LLVMBuildExtractElement(bld->builder, r, index0, "r0"); r1 = LLVMBuildExtractElement(bld->builder, r, index1, "r1"); r2 = LLVMBuildExtractElement(bld->builder, r, index2, "r2"); drdx = LLVMBuildSub(bld->builder, r1, r0, ""); drdx = lp_build_abs(float_bld, drdx); drdy = LLVMBuildSub(bld->builder, r2, r0, ""); drdy = lp_build_abs(float_bld, drdy); } } /* Compute rho = max of all partial derivatives scaled by texture size. * XXX this could be vectorized somewhat */ rho = LLVMBuildMul(bld->builder, lp_build_max(float_bld, dsdx, dsdy), lp_build_int_to_float(float_bld, width), ""); if (dims > 1) { LLVMValueRef max; max = LLVMBuildMul(bld->builder, lp_build_max(float_bld, dtdx, dtdy), lp_build_int_to_float(float_bld, height), ""); rho = lp_build_max(float_bld, rho, max); if (dims > 2) { max = LLVMBuildMul(bld->builder, lp_build_max(float_bld, drdx, drdy), lp_build_int_to_float(float_bld, depth), ""); rho = lp_build_max(float_bld, rho, max); } } /* compute lod = log2(rho) */ lod = lp_build_log2(float_bld, rho); /* add lod bias */ lod = LLVMBuildAdd(bld->builder, lod, lod_bias, "LOD bias"); /* clamp lod */ lod = lp_build_clamp(float_bld, lod, min_lod, max_lod); return lod; } /** * For PIPE_TEX_MIPFILTER_NEAREST, convert float LOD to integer * mipmap level index. * Note: this is all scalar code. * \param lod scalar float texture level of detail * \param level_out returns integer */ static void lp_build_nearest_mip_level(struct lp_build_sample_context *bld, unsigned unit, LLVMValueRef lod, LLVMValueRef *level_out) { struct lp_build_context *float_bld = &bld->float_bld; struct lp_build_context *int_bld = &bld->int_bld; LLVMValueRef last_level, level; LLVMValueRef zero = LLVMConstInt(LLVMInt32Type(), 0, 0); last_level = bld->dynamic_state->last_level(bld->dynamic_state, bld->builder, unit); /* convert float lod to integer */ level = lp_build_iround(float_bld, lod); /* clamp level to legal range of levels */ *level_out = lp_build_clamp(int_bld, level, zero, last_level); } /** * For PIPE_TEX_MIPFILTER_LINEAR, convert float LOD to integer to * two (adjacent) mipmap level indexes. Later, we'll sample from those * two mipmap levels and interpolate between them. */ static void lp_build_linear_mip_levels(struct lp_build_sample_context *bld, unsigned unit, LLVMValueRef lod, LLVMValueRef *level0_out, LLVMValueRef *level1_out, LLVMValueRef *weight_out) { struct lp_build_context *coord_bld = &bld->coord_bld; struct lp_build_context *int_coord_bld = &bld->int_coord_bld; LLVMValueRef last_level, level; last_level = bld->dynamic_state->last_level(bld->dynamic_state, bld->builder, unit); /* convert float lod to integer */ level = lp_build_ifloor(coord_bld, lod); /* compute level 0 and clamp to legal range of levels */ *level0_out = lp_build_clamp(int_coord_bld, level, int_coord_bld->zero, last_level); /* compute level 1 and clamp to legal range of levels */ *level1_out = lp_build_add(int_coord_bld, *level0_out, int_coord_bld->one); *level1_out = lp_build_min(int_coord_bld, *level1_out, int_coord_bld->zero); *weight_out = lp_build_fract(coord_bld, lod); } /** * Sample 2D texture with nearest filtering, no mipmapping. */ 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_array, LLVMValueRef *texel) { LLVMValueRef x, y; LLVMValueRef data_ptr; x = lp_build_sample_wrap_nearest(bld, s, width, bld->static_state->pot_width, bld->static_state->wrap_s); y = lp_build_sample_wrap_nearest(bld, t, height, bld->static_state->pot_height, bld->static_state->wrap_t); lp_build_name(x, "tex.x.wrapped"); lp_build_name(y, "tex.y.wrapped"); /* get pointer to mipmap level 0 data */ data_ptr = lp_build_get_const_mipmap_level(bld, data_array, 0); lp_build_sample_texel_soa(bld, width, height, x, y, stride, data_ptr, texel); } /** * Sample 2D texture with nearest filtering, nearest mipmap. */ static void lp_build_sample_2d_nearest_mip_nearest_soa(struct lp_build_sample_context *bld, unsigned unit, LLVMValueRef s, LLVMValueRef t, LLVMValueRef width, LLVMValueRef height, LLVMValueRef width_vec, LLVMValueRef height_vec, LLVMValueRef stride, LLVMValueRef data_array, LLVMValueRef *texel) { LLVMValueRef x, y; LLVMValueRef lod, ilevel, ilevel_vec; LLVMValueRef data_ptr; /* compute float LOD */ lod = lp_build_lod_selector(bld, s, t, NULL, width, height, NULL); /* convert LOD to int */ lp_build_nearest_mip_level(bld, unit, lod, &ilevel); ilevel_vec = lp_build_broadcast_scalar(&bld->int_coord_bld, ilevel); /* compute width_vec, height at mipmap level 'ilevel' */ width_vec = lp_build_minify(bld, width_vec, ilevel_vec); height_vec = lp_build_minify(bld, height_vec, ilevel_vec); stride = lp_build_minify(bld, stride, ilevel_vec); x = lp_build_sample_wrap_nearest(bld, s, width_vec, bld->static_state->pot_width, bld->static_state->wrap_s); y = lp_build_sample_wrap_nearest(bld, t, height_vec, bld->static_state->pot_height, bld->static_state->wrap_t); lp_build_name(x, "tex.x.wrapped"); lp_build_name(y, "tex.y.wrapped"); /* get pointer to mipmap level [ilevel] data */ if (0) data_ptr = lp_build_get_mipmap_level(bld, data_array, ilevel); else data_ptr = lp_build_get_const_mipmap_level(bld, data_array, 0); lp_build_sample_texel_soa(bld, width_vec, height_vec, x, y, stride, data_ptr, texel); } /** * Sample 2D texture with bilinear filtering. */ 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_array, LLVMValueRef *texel) { LLVMValueRef s_fpart; LLVMValueRef t_fpart; LLVMValueRef x0, x1; LLVMValueRef y0, y1; LLVMValueRef neighbors[2][2][4]; LLVMValueRef data_ptr; unsigned chan; lp_build_sample_wrap_linear(bld, s, width, bld->static_state->pot_width, bld->static_state->wrap_s, &x0, &x1, &s_fpart); lp_build_sample_wrap_linear(bld, t, height, bld->static_state->pot_height, bld->static_state->wrap_t, &y0, &y1, &t_fpart); /* get pointer to mipmap level 0 data */ data_ptr = lp_build_get_const_mipmap_level(bld, data_array, 0); lp_build_sample_texel_soa(bld, width, height, x0, y0, stride, data_ptr, neighbors[0][0]); lp_build_sample_texel_soa(bld, width, height, x1, y0, stride, data_ptr, neighbors[0][1]); lp_build_sample_texel_soa(bld, width, height, x0, y1, stride, data_ptr, neighbors[1][0]); lp_build_sample_texel_soa(bld, width, height, 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_rgba8_to_f32_soa(LLVMBuilderRef builder, struct lp_type dst_type, LLVMValueRef packed, LLVMValueRef *rgba) { LLVMValueRef mask = lp_build_int_const_scalar(dst_type, 0xff); unsigned chan; /* Decode the input vector components */ for (chan = 0; chan < 4; ++chan) { unsigned start = chan*8; unsigned stop = start + 8; LLVMValueRef input; input = packed; if(start) input = LLVMBuildLShr(builder, input, lp_build_int_const_scalar(dst_type, start), ""); if(stop < 32) input = LLVMBuildAnd(builder, input, mask, ""); input = lp_build_unsigned_norm_to_float(builder, 8, dst_type, input); rgba[chan] = input; } } static void lp_build_sample_2d_linear_aos(struct lp_build_sample_context *bld, LLVMValueRef s, LLVMValueRef t, LLVMValueRef width, LLVMValueRef height, LLVMValueRef stride, LLVMValueRef data_array, LLVMValueRef *texel) { LLVMBuilderRef builder = bld->builder; struct lp_build_context i32, h16, u8n; LLVMTypeRef i32_vec_type, h16_vec_type, u8n_vec_type; LLVMValueRef i32_c8, i32_c128, i32_c255; LLVMValueRef s_ipart, s_fpart, s_fpart_lo, s_fpart_hi; LLVMValueRef t_ipart, t_fpart, t_fpart_lo, t_fpart_hi; LLVMValueRef x0, x1; LLVMValueRef y0, y1; LLVMValueRef neighbors[2][2]; LLVMValueRef neighbors_lo[2][2]; LLVMValueRef neighbors_hi[2][2]; LLVMValueRef packed, packed_lo, packed_hi; LLVMValueRef unswizzled[4]; lp_build_context_init(&i32, builder, lp_type_int_vec(32)); lp_build_context_init(&h16, builder, lp_type_ufixed(16)); lp_build_context_init(&u8n, builder, lp_type_unorm(8)); i32_vec_type = lp_build_vec_type(i32.type); h16_vec_type = lp_build_vec_type(h16.type); u8n_vec_type = lp_build_vec_type(u8n.type); if (bld->static_state->normalized_coords) { LLVMTypeRef coord_vec_type = lp_build_vec_type(bld->coord_type); LLVMValueRef fp_width = LLVMBuildSIToFP(bld->builder, width, coord_vec_type, ""); LLVMValueRef fp_height = LLVMBuildSIToFP(bld->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); } /* scale coords by 256 (8 fractional bits) */ s = lp_build_mul_imm(&bld->coord_bld, s, 256); t = lp_build_mul_imm(&bld->coord_bld, t, 256); /* convert float to int */ s = LLVMBuildFPToSI(builder, s, i32_vec_type, ""); t = LLVMBuildFPToSI(builder, t, i32_vec_type, ""); /* subtract 0.5 (add -128) */ i32_c128 = lp_build_int_const_scalar(i32.type, -128); s = LLVMBuildAdd(builder, s, i32_c128, ""); t = LLVMBuildAdd(builder, t, i32_c128, ""); /* compute floor (shift right 8) */ i32_c8 = lp_build_int_const_scalar(i32.type, 8); s_ipart = LLVMBuildAShr(builder, s, i32_c8, ""); t_ipart = LLVMBuildAShr(builder, t, i32_c8, ""); /* compute fractional part (AND with 0xff) */ i32_c255 = lp_build_int_const_scalar(i32.type, 255); s_fpart = LLVMBuildAnd(builder, s, i32_c255, ""); t_fpart = LLVMBuildAnd(builder, t, i32_c255, ""); x0 = s_ipart; y0 = t_ipart; 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); x0 = lp_build_sample_wrap_int(bld, x0, width, bld->static_state->pot_width, bld->static_state->wrap_s); y0 = lp_build_sample_wrap_int(bld, y0, height, bld->static_state->pot_height, bld->static_state->wrap_t); x1 = lp_build_sample_wrap_int(bld, x1, width, bld->static_state->pot_width, bld->static_state->wrap_s); y1 = lp_build_sample_wrap_int(bld, y1, height, bld->static_state->pot_height, bld->static_state->wrap_t); /* * Transform 4 x i32 in * * s_fpart = {s0, s1, s2, s3} * * into 8 x i16 * * s_fpart = {00, s0, 00, s1, 00, s2, 00, s3} * * into two 8 x i16 * * s_fpart_lo = {s0, s0, s0, s0, s1, s1, s1, s1} * s_fpart_hi = {s2, s2, s2, s2, s3, s3, s3, s3} * * and likewise for t_fpart. There is no risk of loosing precision here * since the fractional parts only use the lower 8bits. */ s_fpart = LLVMBuildBitCast(builder, s_fpart, h16_vec_type, ""); t_fpart = LLVMBuildBitCast(builder, t_fpart, h16_vec_type, ""); { LLVMTypeRef elem_type = LLVMInt32Type(); LLVMValueRef shuffles_lo[LP_MAX_VECTOR_LENGTH]; LLVMValueRef shuffles_hi[LP_MAX_VECTOR_LENGTH]; LLVMValueRef shuffle_lo; LLVMValueRef shuffle_hi; unsigned i, j; for(j = 0; j < h16.type.length; j += 4) { unsigned subindex = util_cpu_caps.little_endian ? 0 : 1; LLVMValueRef index; index = LLVMConstInt(elem_type, j/2 + subindex, 0); for(i = 0; i < 4; ++i) shuffles_lo[j + i] = index; index = LLVMConstInt(elem_type, h16.type.length/2 + j/2 + subindex, 0); for(i = 0; i < 4; ++i) shuffles_hi[j + i] = index; } shuffle_lo = LLVMConstVector(shuffles_lo, h16.type.length); shuffle_hi = LLVMConstVector(shuffles_hi, h16.type.length); s_fpart_lo = LLVMBuildShuffleVector(builder, s_fpart, h16.undef, shuffle_lo, ""); t_fpart_lo = LLVMBuildShuffleVector(builder, t_fpart, h16.undef, shuffle_lo, ""); s_fpart_hi = LLVMBuildShuffleVector(builder, s_fpart, h16.undef, shuffle_hi, ""); t_fpart_hi = LLVMBuildShuffleVector(builder, t_fpart, h16.undef, shuffle_hi, ""); } /* * Fetch the pixels as 4 x 32bit (rgba order might differ): * * rgba0 rgba1 rgba2 rgba3 * * bit cast them into 16 x u8 * * r0 g0 b0 a0 r1 g1 b1 a1 r2 g2 b2 a2 r3 g3 b3 a3 * * unpack them into two 8 x i16: * * r0 g0 b0 a0 r1 g1 b1 a1 * r2 g2 b2 a2 r3 g3 b3 a3 * * The higher 8 bits of the resulting elements will be zero. */ neighbors[0][0] = lp_build_sample_packed(bld, x0, y0, stride, data_array); neighbors[0][1] = lp_build_sample_packed(bld, x1, y0, stride, data_array); neighbors[1][0] = lp_build_sample_packed(bld, x0, y1, stride, data_array); neighbors[1][1] = lp_build_sample_packed(bld, x1, y1, stride, data_array); neighbors[0][0] = LLVMBuildBitCast(builder, neighbors[0][0], u8n_vec_type, ""); neighbors[0][1] = LLVMBuildBitCast(builder, neighbors[0][1], u8n_vec_type, ""); neighbors[1][0] = LLVMBuildBitCast(builder, neighbors[1][0], u8n_vec_type, ""); neighbors[1][1] = LLVMBuildBitCast(builder, neighbors[1][1], u8n_vec_type, ""); lp_build_unpack2(builder, u8n.type, h16.type, neighbors[0][0], &neighbors_lo[0][0], &neighbors_hi[0][0]); lp_build_unpack2(builder, u8n.type, h16.type, neighbors[0][1], &neighbors_lo[0][1], &neighbors_hi[0][1]); lp_build_unpack2(builder, u8n.type, h16.type, neighbors[1][0], &neighbors_lo[1][0], &neighbors_hi[1][0]); lp_build_unpack2(builder, u8n.type, h16.type, neighbors[1][1], &neighbors_lo[1][1], &neighbors_hi[1][1]); /* * Linear interpolate with 8.8 fixed point. */ packed_lo = lp_build_lerp_2d(&h16, s_fpart_lo, t_fpart_lo, neighbors_lo[0][0], neighbors_lo[0][1], neighbors_lo[1][0], neighbors_lo[1][1]); packed_hi = lp_build_lerp_2d(&h16, s_fpart_hi, t_fpart_hi, neighbors_hi[0][0], neighbors_hi[0][1], neighbors_hi[1][0], neighbors_hi[1][1]); packed = lp_build_pack2(builder, h16.type, u8n.type, packed_lo, packed_hi); /* * Convert to SoA and swizzle. */ packed = LLVMBuildBitCast(builder, packed, i32_vec_type, ""); lp_build_rgba8_to_f32_soa(bld->builder, bld->texel_type, packed, unswizzled); lp_build_format_swizzle_soa(bld->format_desc, bld->texel_type, unswizzled, texel); } 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 == PIPE_TEX_COMPARE_NONE) 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; } /** * Build texture sampling code. * 'texel' will return a vector of four LLVMValueRefs corresponding to * R, G, B, A. * \param type vector float type to use for coords, etc. */ void lp_build_sample_soa(LLVMBuilderRef builder, const struct lp_sampler_static_state *static_state, struct lp_sampler_dynamic_state *dynamic_state, struct lp_type type, unsigned unit, unsigned num_coords, const LLVMValueRef *coords, LLVMValueRef lodbias, LLVMValueRef *texel) { struct lp_build_sample_context bld; LLVMValueRef width, width_vec; LLVMValueRef height, height_vec; LLVMValueRef stride, stride_vec; LLVMValueRef data_array; LLVMValueRef s; LLVMValueRef t; LLVMValueRef r; boolean done = FALSE; (void) lp_build_lod_selector; /* temporary to silence warning */ (void) lp_build_nearest_mip_level; (void) lp_build_linear_mip_levels; (void) lp_build_minify; /* 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.float_type = lp_type_float(32); bld.int_type = lp_type_int(32); bld.coord_type = type; bld.uint_coord_type = lp_uint_type(type); bld.int_coord_type = lp_int_type(type); bld.texel_type = type; lp_build_context_init(&bld.float_bld, builder, bld.float_type); lp_build_context_init(&bld.int_bld, builder, bld.int_type); lp_build_context_init(&bld.coord_bld, builder, bld.coord_type); lp_build_context_init(&bld.uint_coord_bld, builder, bld.uint_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_array = dynamic_state->data_ptr(dynamic_state, builder, unit); /* Note that data_array is an array[level] of pointers to texture images */ s = coords[0]; t = coords[1]; r = coords[2]; width_vec = lp_build_broadcast_scalar(&bld.uint_coord_bld, width); height_vec = lp_build_broadcast_scalar(&bld.uint_coord_bld, height); stride_vec = lp_build_broadcast_scalar(&bld.uint_coord_bld, stride); if(static_state->target == PIPE_TEXTURE_1D) t = bld.coord_bld.zero; switch (static_state->min_mip_filter) { case PIPE_TEX_MIPFILTER_NONE: break; case PIPE_TEX_MIPFILTER_NEAREST: switch (static_state->min_img_filter) { case PIPE_TEX_FILTER_NEAREST: lp_build_sample_2d_nearest_mip_nearest_soa(&bld, unit, s, t, width, height, width_vec, height_vec, stride_vec, data_array, texel); done = TRUE; break; } break; case PIPE_TEX_MIPFILTER_LINEAR: break; default: assert(0 && "invalid mip filter"); } if (!done) { switch (static_state->min_img_filter) { case PIPE_TEX_FILTER_NEAREST: lp_build_sample_2d_nearest_soa(&bld, s, t, width_vec, height_vec, stride_vec, data_array, texel); break; case PIPE_TEX_FILTER_LINEAR: if(lp_format_is_rgba8(bld.format_desc) && is_simple_wrap_mode(static_state->wrap_s) && is_simple_wrap_mode(static_state->wrap_t)) lp_build_sample_2d_linear_aos(&bld, s, t, width_vec, height_vec, stride_vec, data_array, texel); else lp_build_sample_2d_linear_soa(&bld, s, t, width_vec, height_vec, stride_vec, data_array, texel); break; default: assert(0); } } /* FIXME: respect static_state->min_mip_filter */; /* FIXME: respect static_state->mag_img_filter */; lp_build_sample_compare(&bld, r, texel); }