Thomas Dinges
6b8bb26c45
Required by Metal backend for efficient shader compilation. EEVEE material resource binding permutations now controlled via CreateInfo and selected based on material options. Other existing CreateInfo's also modified to ensure explicitness for depth-writing mode. Other missing bindings also addressed to ensure full compliance with the Metal backend. Authored by Apple: Michael Parkin-White Ref T96261 Reviewed By: fclem Differential Revision: https://developer.blender.org/D16243
109 lines
3.4 KiB
C
109 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2020 Blender Foundation. */
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/** \file
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* \ingroup draw_engine
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*
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* EEVEE LUT generation:
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*
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* Routine to generate the LUT used by eevee stored in eevee_lut.h
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* These functions are not to be used in the final executable.
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*/
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#include "DRW_render.h"
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#include "BLI_fileops.h"
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#include "BLI_rand.h"
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#include "BLI_string_utils.h"
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#include "eevee_private.h"
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#define DO_FILE_OUTPUT 0
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float *EEVEE_lut_update_ggx_brdf(int lut_size)
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{
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DRWPass *pass = DRW_pass_create(__func__, DRW_STATE_WRITE_COLOR);
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DRWShadingGroup *grp = DRW_shgroup_create(EEVEE_shaders_ggx_lut_sh_get(), pass);
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DRW_shgroup_uniform_float_copy(grp, "sampleCount", 64.0f); /* Actual sample count is squared. */
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DRW_shgroup_call_procedural_triangles(grp, NULL, 1);
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GPUTexture *tex = DRW_texture_create_2d(lut_size, lut_size, GPU_RG16F, 0, NULL);
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GPUFrameBuffer *fb = NULL;
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GPU_framebuffer_ensure_config(&fb,
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{
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GPU_ATTACHMENT_NONE,
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GPU_ATTACHMENT_TEXTURE(tex),
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});
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GPU_framebuffer_bind(fb);
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DRW_draw_pass(pass);
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GPU_FRAMEBUFFER_FREE_SAFE(fb);
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float *data = GPU_texture_read(tex, GPU_DATA_FLOAT, 0);
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GPU_texture_free(tex);
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#if DO_FILE_OUTPUT
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/* Content is to be put inside eevee_lut.c */
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FILE *f = BLI_fopen("bsdf_split_sum_ggx.h", "w");
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fprintf(f, "const float bsdf_split_sum_ggx[%d * %d * 2] = {", lut_size, lut_size);
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for (int i = 0; i < lut_size * lut_size * 2;) {
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fprintf(f, "\n ");
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for (int j = 0; j < 4; j++, i += 2) {
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fprintf(f, "%ff, %ff, ", data[i], data[i + 1]);
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}
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}
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fprintf(f, "\n};\n");
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fclose(f);
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#endif
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return data;
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}
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float *EEVEE_lut_update_ggx_btdf(int lut_size, int lut_depth)
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{
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float roughness;
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DRWPass *pass = DRW_pass_create(__func__, DRW_STATE_WRITE_COLOR);
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DRWShadingGroup *grp = DRW_shgroup_create(EEVEE_shaders_ggx_refraction_lut_sh_get(), pass);
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DRW_shgroup_uniform_float_copy(grp, "sampleCount", 64.0f); /* Actual sample count is squared. */
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DRW_shgroup_uniform_float(grp, "z_factor", &roughness, 1);
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DRW_shgroup_call_procedural_triangles(grp, NULL, 1);
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GPUTexture *tex = DRW_texture_create_2d_array(lut_size, lut_size, lut_depth, GPU_RG16F, 0, NULL);
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GPUFrameBuffer *fb = NULL;
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for (int i = 0; i < lut_depth; i++) {
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GPU_framebuffer_ensure_config(&fb,
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{
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GPU_ATTACHMENT_NONE,
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GPU_ATTACHMENT_TEXTURE_LAYER(tex, i),
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});
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GPU_framebuffer_bind(fb);
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roughness = i / (lut_depth - 1.0f);
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DRW_draw_pass(pass);
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}
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GPU_FRAMEBUFFER_FREE_SAFE(fb);
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float *data = GPU_texture_read(tex, GPU_DATA_FLOAT, 0);
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GPU_texture_free(tex);
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#if DO_FILE_OUTPUT
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/* Content is to be put inside eevee_lut.c. Don't forget to format the output. */
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FILE *f = BLI_fopen("btdf_split_sum_ggx.h", "w");
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fprintf(f, "const float btdf_split_sum_ggx[%d][%d * %d * 2] = {", lut_depth, lut_size, lut_size);
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fprintf(f, "\n ");
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int ofs = 0;
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for (int d = 0; d < lut_depth; d++) {
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fprintf(f, "{\n");
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for (int i = 0; i < lut_size * lut_size * 2;) {
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for (int j = 0; j < 4; j++, i += 2, ofs += 2) {
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fprintf(f, "%ff, %ff, ", data[ofs], data[ofs + 1]);
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}
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fprintf(f, "\n ");
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}
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fprintf(f, "},\n");
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}
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fprintf(f, "};\n");
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fclose(f);
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#endif
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return data;
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}
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