Workbench: TAA optimalization

First frame of the TAA is just a regular copy of the previous buffer. so
we write directly to the final buffer and skip the taa shader. We do
init the history buffer via blit so it will be initialized for the other
iterations.

1 files changed, 2 insertions, 9 deletions

diff --git a/source/blender/draw/engines/workbench/shaders/workbench_effect_taa_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_effect_taa_frag.glsl
index ee5a46ae7c8..1da1b2ad13c 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_effect_taa_frag.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_effect_taa_frag.glsl
@@ -8,14 +8,7 @@ uniform float mixFactor;
 void main()
 {
 	ivec2 texel = ivec2(gl_FragCoord.xy);
-
 	vec4 color_buffer = texelFetch(colorBuffer, texel, 0);
-	if (mixFactor == 1.0)
-	{
-		colorOutput = color_buffer;
-	}
-	else {
-		vec4 history_buffer = texelFetch(historyBuffer, texel, 0);
-		colorOutput = mix(history_buffer, color_buffer, mixFactor);
-	}
+	vec4 history_buffer = texelFetch(historyBuffer, texel, 0);
+	colorOutput = mix(history_buffer, color_buffer, mixFactor);
 }