/************************************************************************** * * 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 */ #ifndef LP_BLD_SAMPLE_H #define LP_BLD_SAMPLE_H #include "pipe/p_format.h" #include "util/u_debug.h" #include "gallivm/lp_bld.h" #include "gallivm/lp_bld_type.h" #include "gallivm/lp_bld_swizzle.h" struct pipe_resource; struct pipe_sampler_view; struct pipe_sampler_state; struct util_format_description; struct lp_type; struct lp_build_context; /** * Helper struct holding all derivatives needed for sampling */ struct lp_derivatives { LLVMValueRef ddx[3]; LLVMValueRef ddy[3]; }; /** * Texture static state. * * These are the bits of state from pipe_resource/pipe_sampler_view that * are embedded in the generated code. */ struct lp_static_texture_state { /* pipe_sampler_view's state */ enum pipe_format format; unsigned swizzle_r:3; /**< PIPE_SWIZZLE_* */ unsigned swizzle_g:3; unsigned swizzle_b:3; unsigned swizzle_a:3; /* pipe_texture's state */ unsigned target:4; /**< PIPE_TEXTURE_* */ unsigned pot_width:1; /**< is the width a power of two? */ unsigned pot_height:1; unsigned pot_depth:1; unsigned level_zero_only:1; }; /** * Sampler static state. * * These are the bits of state from pipe_sampler_state that * are embedded in the generated code. */ struct lp_static_sampler_state { /* pipe_sampler_state's state */ unsigned wrap_s:3; unsigned wrap_t:3; unsigned wrap_r:3; unsigned min_img_filter:2; unsigned min_mip_filter:2; unsigned mag_img_filter:2; unsigned compare_mode:1; unsigned compare_func:3; unsigned normalized_coords:1; unsigned min_max_lod_equal:1; /**< min_lod == max_lod ? */ unsigned lod_bias_non_zero:1; unsigned apply_min_lod:1; /**< min_lod > 0 ? */ unsigned apply_max_lod:1; /**< max_lod < last_level ? */ /* Hacks */ unsigned force_nearest_s:1; unsigned force_nearest_t:1; }; /** * Sampler dynamic state. * * These are the bits of state from pipe_resource/pipe_sampler_view * as well as from sampler state that are computed at runtime. * * There are obtained through callbacks, as we don't want to tie the texture * sampling code generation logic to any particular texture layout or pipe * driver. */ struct lp_sampler_dynamic_state { /* First callbacks for sampler view state */ /** Obtain the base texture width (or number of elements) (returns int32) */ LLVMValueRef (*width)( const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned texture_unit); /** Obtain the base texture height (returns int32) */ LLVMValueRef (*height)( const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned texture_unit); /** Obtain the base texture depth (or array size) (returns int32) */ LLVMValueRef (*depth)( const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned texture_unit); /** Obtain the first mipmap level (base level) (returns int32) */ LLVMValueRef (*first_level)( const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned texture_unit); /** Obtain the number of mipmap levels minus one (returns int32) */ LLVMValueRef (*last_level)( const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned texture_unit); /** Obtain stride in bytes between image rows/blocks (returns int32) */ LLVMValueRef (*row_stride)( const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned texture_unit); /** Obtain stride in bytes between image slices (returns int32) */ LLVMValueRef (*img_stride)( const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned texture_unit); /** Obtain pointer to base of texture */ LLVMValueRef (*base_ptr)( const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned texture_unit); /** Obtain pointer to array of mipmap offsets */ LLVMValueRef (*mip_offsets)( const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned texture_unit); /* These are callbacks for sampler state */ /** Obtain texture min lod (returns float) */ LLVMValueRef (*min_lod)(const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned sampler_unit); /** Obtain texture max lod (returns float) */ LLVMValueRef (*max_lod)(const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned sampler_unit); /** Obtain texture lod bias (returns float) */ LLVMValueRef (*lod_bias)(const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned sampler_unit); /** Obtain texture border color (returns ptr to float[4]) */ LLVMValueRef (*border_color)(const struct lp_sampler_dynamic_state *state, struct gallivm_state *gallivm, unsigned sampler_unit); }; /** * Keep all information for sampling code generation in a single place. */ struct lp_build_sample_context { struct gallivm_state *gallivm; const struct lp_static_texture_state *static_texture_state; const struct lp_static_sampler_state *static_sampler_state; struct lp_sampler_dynamic_state *dynamic_state; const struct util_format_description *format_desc; /* See texture_dims() */ unsigned dims; /** SIMD vector width */ unsigned vector_width; /** number of lod values (valid are 1, length/4, length) */ unsigned num_lods; /** regular scalar float type */ struct lp_type float_type; struct lp_build_context float_bld; /** float vector type */ struct lp_build_context float_vec_bld; /** regular scalar int 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; /** Signed integer coordinates */ struct lp_type int_coord_type; struct lp_build_context int_coord_bld; /** Unsigned integer texture size */ struct lp_type int_size_in_type; struct lp_build_context int_size_in_bld; /** Float incoming texture size */ struct lp_type float_size_in_type; struct lp_build_context float_size_in_bld; /** Unsigned integer texture size (might be per quad) */ struct lp_type int_size_type; struct lp_build_context int_size_bld; /** Float texture size (might be per quad) */ struct lp_type float_size_type; struct lp_build_context float_size_bld; /** Output texels type and build context */ struct lp_type texel_type; struct lp_build_context texel_bld; /** Float level type */ struct lp_type levelf_type; struct lp_build_context levelf_bld; /** Int level type */ struct lp_type leveli_type; struct lp_build_context leveli_bld; /* Common dynamic state values */ LLVMValueRef row_stride_array; LLVMValueRef img_stride_array; LLVMValueRef base_ptr; LLVMValueRef mip_offsets; /** Integer vector with texture width, height, depth */ LLVMValueRef int_size; }; /** * We only support a few wrap modes in lp_build_sample_wrap_linear_int() at * this time. Return whether the given mode is supported by that function. */ static INLINE boolean lp_is_simple_wrap_mode(unsigned mode) { switch (mode) { case PIPE_TEX_WRAP_REPEAT: case PIPE_TEX_WRAP_CLAMP_TO_EDGE: return TRUE; default: return FALSE; } } static INLINE void apply_sampler_swizzle(struct lp_build_sample_context *bld, LLVMValueRef *texel) { unsigned char swizzles[4]; swizzles[0] = bld->static_texture_state->swizzle_r; swizzles[1] = bld->static_texture_state->swizzle_g; swizzles[2] = bld->static_texture_state->swizzle_b; swizzles[3] = bld->static_texture_state->swizzle_a; lp_build_swizzle_soa_inplace(&bld->texel_bld, texel, swizzles); } /* * not really dimension as such, this indicates the amount of * "normal" texture coords subject to minification, wrapping etc. */ static INLINE unsigned texture_dims(enum pipe_texture_target tex) { switch (tex) { case PIPE_TEXTURE_1D: case PIPE_TEXTURE_1D_ARRAY: case PIPE_BUFFER: return 1; case PIPE_TEXTURE_2D: case PIPE_TEXTURE_2D_ARRAY: case PIPE_TEXTURE_RECT: case PIPE_TEXTURE_CUBE: return 2; case PIPE_TEXTURE_3D: return 3; default: assert(0 && "bad texture target in texture_dims()"); return 2; } } boolean lp_sampler_wrap_mode_uses_border_color(unsigned mode, unsigned min_img_filter, unsigned mag_img_filter); /** * Derive the sampler static state. */ void lp_sampler_static_sampler_state(struct lp_static_sampler_state *state, const struct pipe_sampler_state *sampler); void lp_sampler_static_texture_state(struct lp_static_texture_state *state, const struct pipe_sampler_view *view); void lp_build_lod_selector(struct lp_build_sample_context *bld, unsigned texture_index, unsigned sampler_index, LLVMValueRef s, LLVMValueRef t, LLVMValueRef r, LLVMValueRef cube_rho, const struct lp_derivatives *derivs, LLVMValueRef lod_bias, /* optional */ LLVMValueRef explicit_lod, /* optional */ unsigned mip_filter, LLVMValueRef *out_lod_ipart, LLVMValueRef *out_lod_fpart); void lp_build_nearest_mip_level(struct lp_build_sample_context *bld, unsigned texture_unit, LLVMValueRef lod, LLVMValueRef *level_out, LLVMValueRef *out_of_bounds); void lp_build_linear_mip_levels(struct lp_build_sample_context *bld, unsigned texture_unit, LLVMValueRef lod_ipart, LLVMValueRef *lod_fpart_inout, LLVMValueRef *level0_out, LLVMValueRef *level1_out); LLVMValueRef lp_build_get_mipmap_level(struct lp_build_sample_context *bld, LLVMValueRef level); LLVMValueRef lp_build_get_mip_offsets(struct lp_build_sample_context *bld, LLVMValueRef level); void lp_build_mipmap_level_sizes(struct lp_build_sample_context *bld, LLVMValueRef ilevel, LLVMValueRef *out_size_vec, LLVMValueRef *row_stride_vec, LLVMValueRef *img_stride_vec); void lp_build_extract_image_sizes(struct lp_build_sample_context *bld, struct lp_build_context *size_bld, struct lp_type coord_type, LLVMValueRef size, LLVMValueRef *out_width, LLVMValueRef *out_height, LLVMValueRef *out_depth); void lp_build_unnormalized_coords(struct lp_build_sample_context *bld, LLVMValueRef flt_size, LLVMValueRef *s, LLVMValueRef *t, LLVMValueRef *r); void lp_build_cube_lookup(struct lp_build_sample_context *bld, LLVMValueRef s, LLVMValueRef t, LLVMValueRef r, const struct lp_derivatives *derivs, /* optional */ LLVMValueRef *face, LLVMValueRef *face_s, LLVMValueRef *face_t, LLVMValueRef *rho, boolean need_derivs); void lp_build_sample_partial_offset(struct lp_build_context *bld, unsigned block_length, LLVMValueRef coord, LLVMValueRef stride, LLVMValueRef *out_offset, LLVMValueRef *out_i); void lp_build_sample_offset(struct lp_build_context *bld, const struct util_format_description *format_desc, LLVMValueRef x, LLVMValueRef y, LLVMValueRef z, LLVMValueRef y_stride, LLVMValueRef z_stride, LLVMValueRef *out_offset, LLVMValueRef *out_i, LLVMValueRef *out_j); void lp_build_sample_soa(struct gallivm_state *gallivm, const struct lp_static_texture_state *static_texture_state, const struct lp_static_sampler_state *static_sampler_state, struct lp_sampler_dynamic_state *dynamic_texture_state, struct lp_type fp_type, boolean is_fetch, unsigned texture_index, unsigned sampler_index, const LLVMValueRef *coords, const LLVMValueRef *offsets, const struct lp_derivatives *derivs, LLVMValueRef lod_bias, LLVMValueRef explicit_lod, boolean scalar_lod, LLVMValueRef texel_out[4]); void lp_build_coord_repeat_npot_linear(struct lp_build_sample_context *bld, LLVMValueRef coord_f, LLVMValueRef length_i, LLVMValueRef length_f, LLVMValueRef *coord0_i, LLVMValueRef *weight_f); void lp_build_size_query_soa(struct gallivm_state *gallivm, const struct lp_static_texture_state *static_state, struct lp_sampler_dynamic_state *dynamic_state, struct lp_type int_type, unsigned texture_unit, unsigned target, boolean is_sviewinfo, boolean scalar_lod, LLVMValueRef explicit_lod, LLVMValueRef *sizes_out); void lp_build_sample_nop(struct gallivm_state *gallivm, struct lp_type type, const LLVMValueRef *coords, LLVMValueRef texel_out[4]); LLVMValueRef lp_build_minify(struct lp_build_context *bld, LLVMValueRef base_size, LLVMValueRef level); #endif /* LP_BLD_SAMPLE_H */