| /************************************************************************** |
| * |
| * 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> |
| */ |
| |
| #ifndef LP_BLD_SAMPLE_H |
| #define LP_BLD_SAMPLE_H |
| |
| |
| #include <llvm-c/Core.h> |
| |
| struct pipe_texture; |
| struct pipe_sampler_state; |
| struct util_format_description; |
| struct lp_type; |
| struct lp_build_context; |
| |
| |
| /** |
| * Sampler static state. |
| * |
| * These are the bits of state from pipe_texture and pipe_sampler_state that |
| * are embedded in the generated code. |
| */ |
| struct lp_sampler_static_state |
| { |
| /* pipe_texture's state */ |
| enum pipe_format format; |
| unsigned target:2; |
| unsigned pot_width:1; |
| unsigned pot_height:1; |
| unsigned pot_depth:1; |
| |
| /* 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 prefilter:4; |
| }; |
| |
| |
| /** |
| * Sampler dynamic state. |
| * |
| * These are the bits of state from pipe_texture and pipe_sampler_state that |
| * are computed in 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 |
| { |
| |
| /** Obtain the base texture width. */ |
| LLVMValueRef |
| (*width)( struct lp_sampler_dynamic_state *state, |
| LLVMBuilderRef builder, |
| unsigned unit); |
| |
| /** Obtain the base texture height. */ |
| LLVMValueRef |
| (*height)( struct lp_sampler_dynamic_state *state, |
| LLVMBuilderRef builder, |
| unsigned unit); |
| |
| LLVMValueRef |
| (*stride)( struct lp_sampler_dynamic_state *state, |
| LLVMBuilderRef builder, |
| unsigned unit); |
| |
| LLVMValueRef |
| (*data_ptr)( struct lp_sampler_dynamic_state *state, |
| LLVMBuilderRef builder, |
| unsigned unit); |
| |
| }; |
| |
| |
| /** |
| * Derive the sampler static state. |
| */ |
| void |
| lp_sampler_static_state(struct lp_sampler_static_state *state, |
| const struct pipe_texture *texture, |
| const struct pipe_sampler_state *sampler); |
| |
| |
| LLVMValueRef |
| lp_build_gather(LLVMBuilderRef builder, |
| unsigned length, |
| unsigned src_width, |
| unsigned dst_width, |
| LLVMValueRef base_ptr, |
| LLVMValueRef offsets); |
| |
| |
| LLVMValueRef |
| lp_build_sample_offset(struct lp_build_context *bld, |
| const struct util_format_description *format_desc, |
| LLVMValueRef x, |
| LLVMValueRef y, |
| LLVMValueRef y_stride, |
| LLVMValueRef data_ptr); |
| |
| |
| 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 fp_type, |
| unsigned unit, |
| unsigned num_coords, |
| const LLVMValueRef *coords, |
| LLVMValueRef lodbias, |
| LLVMValueRef *texel); |
| |
| |
| |
| #endif /* LP_BLD_SAMPLE_H */ |