diff options
Diffstat (limited to 'source/blender/draw/engines/workbench/workbench_effect_taa.c')
| -rw-r--r-- | source/blender/draw/engines/workbench/workbench_effect_taa.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/source/blender/draw/engines/workbench/workbench_effect_taa.c b/source/blender/draw/engines/workbench/workbench_effect_taa.c new file mode 100644 index 00000000000..929281daaf4 --- /dev/null +++ b/source/blender/draw/engines/workbench/workbench_effect_taa.c @@ -0,0 +1,303 @@ +/* + * Copyright 2016, Blender Foundation. + * + * 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. + * + * Contributor(s): Blender Institute + * + */ + +/** \file workbench_effect_taa.c + * \ingroup draw_engine + */ + + +#include "workbench_private.h" +#include "BLI_jitter_2d.h" + +static struct { + struct GPUShader *effect_taa_sh; + float jitter_8[8][2]; + float jitter_16[16][2]; + float jitter_32[32][2]; +} e_data = {NULL}; + +extern char datatoc_workbench_effect_taa_frag_glsl[]; + + +static void workbench_taa_jitter_init_order(float (*table)[2], int num) +{ + BLI_jitter_init(table, num); + + /* find closest element to center */ + int closest_index = 0; + float closest_squared_distance = 1.0f; + + for (int index = 0; index < num; index++) { + const float squared_dist = SQUARE(table[index][0]) + SQUARE(table[index][1]); + if (squared_dist < closest_squared_distance) { + closest_squared_distance = squared_dist; + closest_index = index; + } + } + + /* move jitter table so that closest sample is in center */ + for (int index = 0; index < num; index++) { + sub_v2_v2(table[index], table[closest_index]); + mul_v2_fl(table[index], 2.0f); + } + + /* swap center sample to the start of the table */ + if (closest_index != 0) { + swap_v2_v2(table[0], table[closest_index]); + } + + /* sort list based on furtest distance with previous */ + for (int i = 0; i < num - 2; i++) { + float f_squared_dist = 0.0; + int f_index = i; + for (int j = i + 1; j < num; j++) { + const float squared_dist = SQUARE(table[i][0] - table[j][0]) + SQUARE(table[i][1] - table[j][1]); + if (squared_dist > f_squared_dist) { + f_squared_dist = squared_dist; + f_index = j; + } + } + swap_v2_v2(table[i + 1], table[f_index]); + } +} + + +static void workbench_taa_jitter_init(void) +{ + workbench_taa_jitter_init_order(e_data.jitter_8, 8); + workbench_taa_jitter_init_order(e_data.jitter_16, 16); + workbench_taa_jitter_init_order(e_data.jitter_32, 32); +} + +int workbench_taa_calculate_num_iterations(WORKBENCH_Data *vedata) +{ + WORKBENCH_StorageList *stl = vedata->stl; + WORKBENCH_PrivateData *wpd = stl->g_data; + int result = 1; + if (TAA_ENABLED(wpd)) { + if (DRW_state_is_image_render()) { + const Scene *scene = DRW_context_state_get()->scene; + result = (scene->r.mode & R_OSA) ? scene->r.osa : 1; + } + else if (IN_RANGE_INCL( + wpd->user_preferences->gpu_viewport_quality, + GPU_VIEWPORT_QUALITY_TAA8, GPU_VIEWPORT_QUALITY_TAA16)) + { + result = 8; + } + else if (IN_RANGE_INCL( + wpd->user_preferences->gpu_viewport_quality, + GPU_VIEWPORT_QUALITY_TAA16, GPU_VIEWPORT_QUALITY_TAA32)) + { + result = 16; + } + else { + result = 32; + } + } + return result; +} + +void workbench_taa_engine_init(WORKBENCH_Data *vedata) +{ + WORKBENCH_EffectInfo *effect_info = vedata->stl->effects; + const DRWContextState *draw_ctx = DRW_context_state_get(); + RegionView3D *rv3d = draw_ctx->rv3d; + + if (e_data.effect_taa_sh == NULL) { + e_data.effect_taa_sh = DRW_shader_create_fullscreen(datatoc_workbench_effect_taa_frag_glsl, NULL); + workbench_taa_jitter_init(); + } + + /* reset complete drawing when navigating. */ + if (effect_info->jitter_index != 0) { + if (rv3d && rv3d->rflag & RV3D_NAVIGATING) { + effect_info->jitter_index = 0; + } + } + + if (effect_info->view_updated) { + effect_info->jitter_index = 0; + effect_info->view_updated = false; + } + + { + float view[4][4]; + float win[4][4]; + DRW_viewport_matrix_get(view, DRW_MAT_VIEW); + DRW_viewport_matrix_get(win, DRW_MAT_WIN); + mul_m4_m4m4(effect_info->curr_mat, view, win); + if (!equals_m4m4(effect_info->curr_mat, effect_info->last_mat)) { + effect_info->jitter_index = 0; + } + } +} + +void workbench_taa_engine_free(void) +{ + DRW_SHADER_FREE_SAFE(e_data.effect_taa_sh); +} + + +DRWPass *workbench_taa_create_pass(WORKBENCH_Data *vedata, GPUTexture **color_buffer_tx) +{ + WORKBENCH_StorageList *stl = vedata->stl; + WORKBENCH_TextureList *txl = vedata->txl; + WORKBENCH_EffectInfo *effect_info = stl->effects; + WORKBENCH_FramebufferList *fbl = vedata->fbl; + WORKBENCH_PrivateData *wpd = stl->g_data; + /* + * jitter_index is not updated yet. This will be done in during draw phase. + * so for now it is inversed. + */ + int previous_jitter_index = effect_info->jitter_index; + + { + const GPUTextureFormat hist_buffer_format = DRW_state_is_image_render() ? GPU_RGBA16F : GPU_RGBA8; + DRW_texture_ensure_fullscreen_2D(&txl->history_buffer_tx, hist_buffer_format, 0); + DRW_texture_ensure_fullscreen_2D(&txl->depth_buffer_tx, GPU_DEPTH24_STENCIL8, 0); + } + + { + GPU_framebuffer_ensure_config(&fbl->effect_taa_fb, { + GPU_ATTACHMENT_NONE, + GPU_ATTACHMENT_TEXTURE(txl->history_buffer_tx), + }); + GPU_framebuffer_ensure_config(&fbl->depth_buffer_fb, { + GPU_ATTACHMENT_TEXTURE(txl->depth_buffer_tx), + }); + } + + + DRWPass *pass = DRW_pass_create("Effect TAA", DRW_STATE_WRITE_COLOR); + DRWShadingGroup *grp = DRW_shgroup_create(e_data.effect_taa_sh, pass); + DRW_shgroup_uniform_texture_ref(grp, "colorBuffer", color_buffer_tx); + DRW_shgroup_uniform_texture_ref(grp, "historyBuffer", &txl->history_buffer_tx); + DRW_shgroup_uniform_float(grp, "mixFactor", &effect_info->taa_mix_factor, 1); + DRW_shgroup_call_add(grp, DRW_cache_fullscreen_quad_get(), NULL); + + /* + * Set the offset for the cavity shader so every iteration different + * samples will be selected + */ + wpd->ssao_params[3] = previous_jitter_index; + + return pass; +} + +void workbench_taa_draw_scene_start(WORKBENCH_Data *vedata) +{ + WORKBENCH_StorageList *stl = vedata->stl; + WORKBENCH_EffectInfo *effect_info = stl->effects; + const float *viewport_size = DRW_viewport_size_get(); + int num_samples = 8; + float (*samples)[2]; + float mix_factor; + + num_samples = workbench_taa_calculate_num_iterations(vedata); + switch (num_samples) { + default: + case 8: + samples = e_data.jitter_8; + break; + case 16: + samples = e_data.jitter_16; + break; + case 32: + samples = e_data.jitter_32; + break; + } + + mix_factor = 1.0f / (effect_info->jitter_index + 1); + + const int bitmask = num_samples - 1; + const int jitter_index = effect_info->jitter_index; + const float *transform_offset = samples[jitter_index]; + effect_info->jitter_index = (jitter_index + 1) & bitmask; + + /* construct new matrices from transform delta */ + float viewmat[4][4]; + float persmat[4][4]; + DRW_viewport_matrix_get(viewmat, DRW_MAT_VIEW); + DRW_viewport_matrix_get(persmat, DRW_MAT_PERS); + DRW_viewport_matrix_get(effect_info->override_winmat, DRW_MAT_WIN); + + window_translate_m4( + effect_info->override_winmat, persmat, + transform_offset[0] / viewport_size[0], + transform_offset[1] / viewport_size[1]); + + mul_m4_m4m4(effect_info->override_persmat, effect_info->override_winmat, viewmat); + invert_m4_m4(effect_info->override_persinv, effect_info->override_persmat); + invert_m4_m4(effect_info->override_wininv, effect_info->override_winmat); + + DRW_viewport_matrix_override_set(effect_info->override_persmat, DRW_MAT_PERS); + DRW_viewport_matrix_override_set(effect_info->override_persinv, DRW_MAT_PERSINV); + DRW_viewport_matrix_override_set(effect_info->override_winmat, DRW_MAT_WIN); + DRW_viewport_matrix_override_set(effect_info->override_wininv, DRW_MAT_WININV); + + /* weight the mix factor by the jitter index */ + effect_info->taa_mix_factor = mix_factor; +} + +void workbench_taa_draw_scene_end(WORKBENCH_Data *vedata) +{ + /* + * If first frame than the offset is 0.0 and its depth is the depth buffer to use + * for the rest of the draw engines. We store it in a persistent buffer. + * + * If it is not the first frame we copy the persistent buffer back to the + * default depth buffer + */ + const WORKBENCH_StorageList *stl = vedata->stl; + const WORKBENCH_FramebufferList *fbl = vedata->fbl; + const DefaultFramebufferList *dfbl = DRW_viewport_framebuffer_list_get(); + WORKBENCH_EffectInfo *effect_info = stl->effects; + + if (effect_info->jitter_index == 1) { + GPU_framebuffer_blit(dfbl->depth_only_fb, 0, fbl->depth_buffer_fb, 0, GPU_DEPTH_BIT); + } + else { + GPU_framebuffer_blit(fbl->depth_buffer_fb, 0, dfbl->depth_only_fb, 0, GPU_DEPTH_BIT); + } + + GPU_framebuffer_blit(dfbl->color_only_fb, 0, fbl->effect_taa_fb, 0, GPU_COLOR_BIT); + + if (!DRW_state_is_image_render()) { + DRW_viewport_matrix_override_unset_all(); + } + + copy_m4_m4(effect_info->last_mat, effect_info->curr_mat); + if (effect_info->jitter_index != 0 && !DRW_state_is_image_render()) { + DRW_viewport_request_redraw(); + } +} + +void workbench_taa_view_updated(WORKBENCH_Data *vedata) +{ + WORKBENCH_StorageList *stl = vedata->stl; + if (stl) { + WORKBENCH_EffectInfo *effect_info = stl->effects; + if (effect_info) { + effect_info->view_updated = true; + } + } +} |