1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright 2016, Blender Foundation.
*/
/** \file
* \ingroup draw_engine
*
* Screen space reflections and refractions techniques.
*/
#include "DRW_render.h"
#include "BLI_dynstr.h"
#include "BLI_string_utils.h"
#include "DEG_depsgraph_query.h"
#include "GPU_texture.h"
#include "eevee_private.h"
int EEVEE_screen_raytrace_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata)
{
EEVEE_CommonUniformBuffer *common_data = &sldata->common_data;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_EffectsInfo *effects = stl->effects;
const float *viewport_size = DRW_viewport_size_get();
const DRWContextState *draw_ctx = DRW_context_state_get();
const Scene *scene_eval = DEG_get_evaluated_scene(draw_ctx->depsgraph);
if (scene_eval->eevee.flag & SCE_EEVEE_SSR_ENABLED) {
const bool use_refraction = (scene_eval->eevee.flag & SCE_EEVEE_SSR_REFRACTION) != 0;
const bool is_persp = DRW_view_is_persp_get(NULL);
if (effects->ssr_was_persp != is_persp) {
effects->ssr_was_persp = is_persp;
DRW_viewport_request_redraw();
EEVEE_temporal_sampling_reset(vedata);
stl->g_data->valid_double_buffer = false;
}
if (!effects->ssr_was_valid_double_buffer) {
DRW_viewport_request_redraw();
EEVEE_temporal_sampling_reset(vedata);
}
effects->ssr_was_valid_double_buffer = stl->g_data->valid_double_buffer;
effects->reflection_trace_full = (scene_eval->eevee.flag & SCE_EEVEE_SSR_HALF_RESOLUTION) == 0;
common_data->ssr_thickness = scene_eval->eevee.ssr_thickness;
common_data->ssr_border_fac = scene_eval->eevee.ssr_border_fade;
common_data->ssr_firefly_fac = scene_eval->eevee.ssr_firefly_fac;
common_data->ssr_max_roughness = scene_eval->eevee.ssr_max_roughness;
common_data->ssr_quality = 1.0f - 0.95f * scene_eval->eevee.ssr_quality;
common_data->ssr_brdf_bias = 0.1f + common_data->ssr_quality * 0.6f; /* Range [0.1, 0.7]. */
if (common_data->ssr_firefly_fac < 1e-8f) {
common_data->ssr_firefly_fac = FLT_MAX;
}
void *owner = (void *)EEVEE_screen_raytrace_init;
const int divisor = (effects->reflection_trace_full) ? 1 : 2;
int tracing_res[2] = {(int)viewport_size[0] / divisor, (int)viewport_size[1] / divisor};
const int size_fs[2] = {(int)viewport_size[0], (int)viewport_size[1]};
const bool high_qual_input = true; /* TODO dither low quality input */
const eGPUTextureFormat format = (high_qual_input) ? GPU_RGBA16F : GPU_RGBA8;
tracing_res[0] = max_ii(1, tracing_res[0]);
tracing_res[1] = max_ii(1, tracing_res[1]);
common_data->ssr_uv_scale[0] = size_fs[0] / ((float)tracing_res[0] * divisor);
common_data->ssr_uv_scale[1] = size_fs[1] / ((float)tracing_res[1] * divisor);
/* MRT for the shading pass in order to output needed data for the SSR pass. */
effects->ssr_specrough_input = DRW_texture_pool_query_2d(UNPACK2(size_fs), format, owner);
GPU_framebuffer_texture_attach(fbl->main_fb, effects->ssr_specrough_input, 2, 0);
/* Ray-tracing output. */
effects->ssr_hit_output = DRW_texture_pool_query_2d(UNPACK2(tracing_res), GPU_RGBA16F, owner);
effects->ssr_hit_depth = DRW_texture_pool_query_2d(UNPACK2(tracing_res), GPU_R16F, owner);
GPU_framebuffer_ensure_config(&fbl->screen_tracing_fb,
{
GPU_ATTACHMENT_NONE,
GPU_ATTACHMENT_TEXTURE(effects->ssr_hit_output),
GPU_ATTACHMENT_TEXTURE(effects->ssr_hit_depth),
});
return EFFECT_SSR | EFFECT_NORMAL_BUFFER | EFFECT_RADIANCE_BUFFER | EFFECT_DOUBLE_BUFFER |
((use_refraction) ? EFFECT_REFRACT : 0);
}
/* Cleanup to release memory */
GPU_FRAMEBUFFER_FREE_SAFE(fbl->screen_tracing_fb);
effects->ssr_specrough_input = NULL;
effects->ssr_hit_output = NULL;
return 0;
}
void EEVEE_screen_raytrace_cache_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata)
{
EEVEE_PassList *psl = vedata->psl;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_TextureList *txl = vedata->txl;
EEVEE_EffectsInfo *effects = stl->effects;
LightCache *lcache = stl->g_data->light_cache;
if ((effects->enabled_effects & EFFECT_SSR) != 0) {
struct GPUShader *trace_shader = EEVEE_shaders_effect_reflection_trace_sh_get();
struct GPUShader *resolve_shader = EEVEE_shaders_effect_reflection_resolve_sh_get();
int hitbuf_size[3];
GPU_texture_get_mipmap_size(effects->ssr_hit_output, 0, hitbuf_size);
/** Screen space raytracing overview
*
* Following Frostbite stochastic SSR.
*
* - First pass Trace rays across the depth buffer. The hit position and PDF are
* recorded in a RGBA16F render target for each ray (sample).
*
* - We down-sample the previous frame color buffer.
*
* - For each final pixel, we gather neighbors rays and choose a color buffer
* mipmap for each ray using its PDF. (filtered importance sampling)
* We then evaluate the lighting from the probes and mix the results together.
*/
DRW_PASS_CREATE(psl->ssr_raytrace, DRW_STATE_WRITE_COLOR);
DRWShadingGroup *grp = DRW_shgroup_create(trace_shader, psl->ssr_raytrace);
DRW_shgroup_uniform_texture_ref(grp, "normalBuffer", &effects->ssr_normal_input);
DRW_shgroup_uniform_texture_ref(grp, "specroughBuffer", &effects->ssr_specrough_input);
DRW_shgroup_uniform_texture_ref(grp, "maxzBuffer", &txl->maxzbuffer);
DRW_shgroup_uniform_texture_ref(grp, "planarDepth", &vedata->txl->planar_depth);
DRW_shgroup_uniform_texture(grp, "utilTex", EEVEE_materials_get_util_tex());
DRW_shgroup_uniform_block(grp, "grid_block", sldata->grid_ubo);
DRW_shgroup_uniform_block(grp, "probe_block", sldata->probe_ubo);
DRW_shgroup_uniform_block(grp, "planar_block", sldata->planar_ubo);
DRW_shgroup_uniform_block(grp, "common_block", sldata->common_ubo);
DRW_shgroup_uniform_block(grp, "renderpass_block", sldata->renderpass_ubo.combined);
DRW_shgroup_uniform_vec2_copy(grp, "targetSize", (float[2]){hitbuf_size[0], hitbuf_size[1]});
DRW_shgroup_uniform_float_copy(
grp, "randomScale", effects->reflection_trace_full ? 0.0f : 0.5f);
DRW_shgroup_call_procedural_triangles(grp, NULL, 1);
eGPUSamplerState no_filter = GPU_SAMPLER_DEFAULT;
DRW_PASS_CREATE(psl->ssr_resolve, DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND_ADD);
grp = DRW_shgroup_create(resolve_shader, psl->ssr_resolve);
DRW_shgroup_uniform_texture_ref(grp, "normalBuffer", &effects->ssr_normal_input);
DRW_shgroup_uniform_texture_ref(grp, "specroughBuffer", &effects->ssr_specrough_input);
DRW_shgroup_uniform_texture_ref(grp, "probeCubes", &lcache->cube_tx.tex);
DRW_shgroup_uniform_texture_ref(grp, "probePlanars", &vedata->txl->planar_pool);
DRW_shgroup_uniform_texture_ref(grp, "planarDepth", &vedata->txl->planar_depth);
DRW_shgroup_uniform_texture_ref_ex(grp, "hitBuffer", &effects->ssr_hit_output, no_filter);
DRW_shgroup_uniform_texture_ref_ex(grp, "hitDepth", &effects->ssr_hit_depth, no_filter);
DRW_shgroup_uniform_texture_ref(grp, "colorBuffer", &txl->filtered_radiance);
DRW_shgroup_uniform_texture_ref(grp, "maxzBuffer", &txl->maxzbuffer);
DRW_shgroup_uniform_texture_ref(grp, "shadowCubeTexture", &sldata->shadow_cube_pool);
DRW_shgroup_uniform_texture_ref(grp, "shadowCascadeTexture", &sldata->shadow_cascade_pool);
DRW_shgroup_uniform_texture(grp, "utilTex", EEVEE_materials_get_util_tex());
DRW_shgroup_uniform_block(grp, "light_block", sldata->light_ubo);
DRW_shgroup_uniform_block(grp, "shadow_block", sldata->shadow_ubo);
DRW_shgroup_uniform_block(grp, "grid_block", sldata->grid_ubo);
DRW_shgroup_uniform_block(grp, "probe_block", sldata->probe_ubo);
DRW_shgroup_uniform_block(grp, "planar_block", sldata->planar_ubo);
DRW_shgroup_uniform_block(grp, "common_block", sldata->common_ubo);
DRW_shgroup_uniform_block(grp, "renderpass_block", sldata->renderpass_ubo.combined);
DRW_shgroup_uniform_int(grp, "samplePoolOffset", &effects->taa_current_sample, 1);
DRW_shgroup_uniform_texture_ref(grp, "horizonBuffer", &effects->gtao_horizons);
DRW_shgroup_call_procedural_triangles(grp, NULL, 1);
}
}
void EEVEE_refraction_compute(EEVEE_ViewLayerData *UNUSED(sldata), EEVEE_Data *vedata)
{
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_TextureList *txl = vedata->txl;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_EffectsInfo *effects = stl->effects;
if ((effects->enabled_effects & EFFECT_REFRACT) != 0) {
EEVEE_effects_downsample_radiance_buffer(vedata, txl->color);
/* Restore */
GPU_framebuffer_bind(fbl->main_fb);
}
}
void EEVEE_reflection_compute(EEVEE_ViewLayerData *UNUSED(sldata), EEVEE_Data *vedata)
{
EEVEE_PassList *psl = vedata->psl;
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_TextureList *txl = vedata->txl;
EEVEE_EffectsInfo *effects = stl->effects;
if (((effects->enabled_effects & EFFECT_SSR) != 0) && stl->g_data->valid_double_buffer) {
DRW_stats_group_start("SSR");
/* Raytrace. */
GPU_framebuffer_bind(fbl->screen_tracing_fb);
DRW_draw_pass(psl->ssr_raytrace);
EEVEE_effects_downsample_radiance_buffer(vedata, txl->color_double_buffer);
GPU_framebuffer_bind(fbl->main_color_fb);
DRW_draw_pass(psl->ssr_resolve);
/* Restore */
GPU_framebuffer_bind(fbl->main_fb);
DRW_stats_group_end();
}
}
void EEVEE_reflection_output_init(EEVEE_ViewLayerData *UNUSED(sldata),
EEVEE_Data *vedata,
uint tot_samples)
{
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_TextureList *txl = vedata->txl;
/* Create FrameBuffer. */
const eGPUTextureFormat texture_format = (tot_samples > 256) ? GPU_RGBA32F : GPU_RGBA16F;
DRW_texture_ensure_fullscreen_2d(&txl->ssr_accum, texture_format, 0);
GPU_framebuffer_ensure_config(&fbl->ssr_accum_fb,
{GPU_ATTACHMENT_NONE, GPU_ATTACHMENT_TEXTURE(txl->ssr_accum)});
}
void EEVEE_reflection_output_accumulate(EEVEE_ViewLayerData *UNUSED(sldata), EEVEE_Data *vedata)
{
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_PassList *psl = vedata->psl;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_EffectsInfo *effects = vedata->stl->effects;
if (stl->g_data->valid_double_buffer) {
GPU_framebuffer_bind(fbl->ssr_accum_fb);
/* Clear texture. */
if (effects->taa_current_sample == 1) {
const float clear[4] = {0.0f, 0.0f, 0.0f, 0.0f};
printf("Clear\n");
GPU_framebuffer_clear_color(fbl->ssr_accum_fb, clear);
}
DRW_draw_pass(psl->ssr_resolve);
}
}
|