diff options
Diffstat (limited to 'source/blender/draw/engines/eevee/eevee_materials.c')
| -rw-r--r-- | source/blender/draw/engines/eevee/eevee_materials.c | 92 |
1 files changed, 91 insertions, 1 deletions
diff --git a/source/blender/draw/engines/eevee/eevee_materials.c b/source/blender/draw/engines/eevee/eevee_materials.c index 046a7ea1367..65e91a38053 100644 --- a/source/blender/draw/engines/eevee/eevee_materials.c +++ b/source/blender/draw/engines/eevee/eevee_materials.c @@ -90,6 +90,7 @@ extern char datatoc_default_frag_glsl[]; extern char datatoc_default_world_frag_glsl[]; extern char datatoc_ltc_lib_glsl[]; extern char datatoc_bsdf_lut_frag_glsl[]; +extern char datatoc_btdf_lut_frag_glsl[]; extern char datatoc_bsdf_common_lib_glsl[]; extern char datatoc_bsdf_direct_lib_glsl[]; extern char datatoc_bsdf_sampling_lib_glsl[]; @@ -169,8 +170,97 @@ static struct GPUTexture *create_ggx_lut_texture(int UNUSED(w), int UNUSED(h)) return tex; } -#endif +static struct GPUTexture *create_ggx_refraction_lut_texture(int w, int h) +{ + struct GPUTexture *tex; + struct GPUTexture *hammersley = create_hammersley_sample_texture(8192); + struct GPUFrameBuffer *fb = NULL; + static float samples_ct = 8192.0f; + static float a2 = 0.0f; + static float inv_samples_ct = 1.0f / 8192.0f; + + char *frag_str = NULL; + + DynStr *ds_vert = BLI_dynstr_new(); + BLI_dynstr_append(ds_vert, datatoc_bsdf_common_lib_glsl); + BLI_dynstr_append(ds_vert, datatoc_bsdf_sampling_lib_glsl); + BLI_dynstr_append(ds_vert, datatoc_btdf_lut_frag_glsl); + frag_str = BLI_dynstr_get_cstring(ds_vert); + BLI_dynstr_free(ds_vert); + + struct GPUShader *sh = DRW_shader_create_fullscreen(frag_str, + "#define HAMMERSLEY_SIZE 8192\n" + "#define BRDF_LUT_SIZE 64\n" + "#define NOISE_SIZE 64\n" + "#define LUT_SIZE 64\n"); + + MEM_freeN(frag_str); + + DRWPass *pass = DRW_pass_create("LightProbe Filtering", DRW_STATE_WRITE_COLOR); + DRWShadingGroup *grp = DRW_shgroup_create(sh, pass); + DRW_shgroup_uniform_float(grp, "a2", &a2, 1); + DRW_shgroup_uniform_float(grp, "sampleCount", &samples_ct, 1); + DRW_shgroup_uniform_float(grp, "invSampleCount", &inv_samples_ct, 1); + DRW_shgroup_uniform_texture(grp, "texHammersley", hammersley); + DRW_shgroup_uniform_texture(grp, "utilTex", e_data.util_tex); + + struct Gwn_Batch *geom = DRW_cache_fullscreen_quad_get(); + DRW_shgroup_call_add(grp, geom, NULL); + + float *texels = MEM_mallocN(sizeof(float[2]) * w * h, "lut"); + + tex = DRW_texture_create_2D(w, h, DRW_TEX_R_16, DRW_TEX_FILTER, (float *)texels); + + DRWFboTexture tex_filter = {&tex, DRW_TEX_R_16, DRW_TEX_FILTER}; + DRW_framebuffer_init(&fb, &draw_engine_eevee_type, w, h, &tex_filter, 1); + + DRW_framebuffer_bind(fb); + + float *data = MEM_mallocN(sizeof(float[3]) * w * h, "lut"); + + float inc = 1.0f / 31.0f; + float roughness = 1e-8f - inc; + FILE *f = BLI_fopen("btdf_split_sum_ggx.h", "w"); + fprintf(f, "static float btdf_split_sum_ggx[32][64 * 64] = {\n"); + do { + roughness += inc; + CLAMP(roughness, 1e-4f, 1.0f); + a2 = powf(roughness, 4.0f); + DRW_draw_pass(pass); + + DRW_framebuffer_read_data(0, 0, w, h, 3, 0, data); + + #if 1 + fprintf(f, "\t{\n\t\t"); + for (int i = 0; i < w*h * 3; i+=3) { + fprintf(f, "%ff,", data[i]); + if (((i/3)+1) % 12 == 0) fprintf(f, "\n\t\t"); + else fprintf(f, " "); + } + fprintf(f, "\n\t},\n"); + #else + for (int i = 0; i < w*h * 3; i+=3) { + if (data[i] < 0.01) printf(" "); + else if (data[i] < 0.3) printf("."); + else if (data[i] < 0.6) printf("+"); + else if (data[i] < 0.9) printf("%%"); + else printf("#"); + if ((i/3+1) % 64 == 0) printf("\n"); + } + #endif + + } while (roughness < 1.0f); + fprintf(f, "\n};\n"); + + fclose(f); + + MEM_freeN(texels); + MEM_freeN(data); + + return tex; +} +#endif /* XXX TODO define all shared resources in a shared place without duplication */ struct GPUTexture *EEVEE_materials_get_util_tex(void) { |