Workbench: Anti-aliasing refactor

- TAA is also enabled for Forward rendering
- Uses less GPU memory (removed one history buffer)
- TAA is done after the color management
- consolidated the aa code between forward and deferred rendering
(workbench_effects_aa.c)

1 files changed, 75 insertions, 0 deletions

diff --git a/source/blender/draw/engines/workbench/workbench_effect_aa.c b/source/blender/draw/engines/workbench/workbench_effect_aa.c
new file mode 100644
index 00000000000..4f1ca7f561b
--- /dev/null
+++ b/source/blender/draw/engines/workbench/workbench_effect_aa.c
@@ -0,0 +1,75 @@
+/*
+ * 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_aa.c
+ *  \ingroup draw_engine
+ */
+
+#include "workbench_private.h"
+
+
+void workbench_aa_create_pass(WORKBENCH_Data *vedata, GPUTexture **tx)
+{
+	WORKBENCH_StorageList *stl = vedata->stl;
+	WORKBENCH_PrivateData *wpd = stl->g_data;
+	WORKBENCH_PassList *psl = vedata->psl;
+	WORKBENCH_EffectInfo *effect_info = stl->effects;
+
+	if (TAA_ENABLED(wpd)) {
+		psl->effect_aa_pass = workbench_taa_create_pass(vedata, tx);
+	}
+	else if (FXAA_ENABLED(wpd)) {
+		psl->effect_aa_pass = workbench_fxaa_create_pass(tx);
+		effect_info->jitter_index = 0;
+	}
+	else {
+		psl->effect_aa_pass = NULL;
+	}
+}
+
+void workbench_aa_draw_pass(WORKBENCH_Data *vedata, GPUTexture *tx)
+{
+	WORKBENCH_StorageList *stl = vedata->stl;
+	WORKBENCH_PrivateData *wpd = stl->g_data;
+	WORKBENCH_FramebufferList *fbl = vedata->fbl;
+	WORKBENCH_PassList *psl = vedata->psl;
+	WORKBENCH_EffectInfo *effect_info = stl->effects;
+
+	DefaultFramebufferList *dfbl = DRW_viewport_framebuffer_list_get();
+	if (FXAA_ENABLED(wpd)) {
+		GPU_framebuffer_bind(fbl->effect_fb);
+		DRW_transform_to_display(tx);
+		GPU_framebuffer_bind(dfbl->color_only_fb);
+		DRW_draw_pass(psl->effect_aa_pass);
+	}
+	else if (TAA_ENABLED(wpd)) {
+		GPU_framebuffer_bind(fbl->effect_fb);
+		DRW_transform_to_display(tx);
+
+		GPU_framebuffer_bind(dfbl->color_only_fb);
+		workbench_taa_draw_pass(effect_info, psl->effect_aa_pass);
+		workbench_taa_draw_scene_end(vedata);
+	}
+	else {
+		GPU_framebuffer_bind(dfbl->color_only_fb);
+		DRW_transform_to_display(tx);
+	}
+}