[Bf-blender-cvs] [8e78282a941] blender2.8: Eevee: Use GPU_RG16 for velocity pass instead of GPU_RG32F.

[Clément Foucault]

Commit: 8e78282a941f0cc97d2cb0288817e650cc963e04
Author: Clément Foucault
Date:   Mon Apr 30 16:16:16 2018 +0200
Branches: blender2.8
https://developer.blender.org/rB8e78282a941f0cc97d2cb0288817e650cc963e04

Eevee: Use GPU_RG16 for velocity pass instead of GPU_RG32F.

===================================================================

M	source/blender/draw/engines/eevee/eevee_effects.c
M	source/blender/draw/engines/eevee/shaders/effect_temporal_aa.glsl
M	source/blender/draw/engines/eevee/shaders/effect_velocity_resolve_frag.glsl

===================================================================

diff --git a/source/blender/draw/engines/eevee/eevee_effects.c b/source/blender/draw/engines/eevee/eevee_effects.c
index 18a2198aa32..984ecfcea89 100644
--- a/source/blender/draw/engines/eevee/eevee_effects.c
+++ b/source/blender/draw/engines/eevee/eevee_effects.c
@@ -234,8 +234,7 @@ void EEVEE_effects_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata, Object
 	 * Motion vector buffer for correct TAA / motion blur.
 	 */
 	if ((effects->enabled_effects & EFFECT_VELOCITY_BUFFER) != 0) {
-		/* TODO use RG16_UNORM */
-		effects->velocity_tx = DRW_texture_pool_query_2D(size_fs[0], size_fs[1], GPU_RG32F,
+		effects->velocity_tx = DRW_texture_pool_query_2D(size_fs[0], size_fs[1], GPU_RG16,
 		                                                 &draw_engine_eevee_type);
 
 		/* TODO output objects velocity during the mainpass. */
diff --git a/source/blender/draw/engines/eevee/shaders/effect_temporal_aa.glsl b/source/blender/draw/engines/eevee/shaders/effect_temporal_aa.glsl
index 8d07ae45b6b..e118777f6c8 100644
--- a/source/blender/draw/engines/eevee/shaders/effect_temporal_aa.glsl
+++ b/source/blender/draw/engines/eevee/shaders/effect_temporal_aa.glsl
@@ -41,6 +41,9 @@ void main()
 	float depth = texelFetch(depthBuffer, texel, 0).r;
 	vec2 motion = texelFetch(velocityBuffer, texel, 0).rg;
 
+	/* Decode from unsigned normalized 16bit texture. */
+	motion = motion * 2.0 - 1.0;
+
 	/* Compute pixel position in previous frame. */
 	vec2 screen_res = vec2(textureSize(colorBuffer, 0).xy);
 	vec2 uv = gl_FragCoord.xy / screen_res;
diff --git a/source/blender/draw/engines/eevee/shaders/effect_velocity_resolve_frag.glsl b/source/blender/draw/engines/eevee/shaders/effect_velocity_resolve_frag.glsl
index 9c118277212..8324c25225c 100644
--- a/source/blender/draw/engines/eevee/shaders/effect_velocity_resolve_frag.glsl
+++ b/source/blender/draw/engines/eevee/shaders/effect_velocity_resolve_frag.glsl
@@ -16,4 +16,7 @@ void main()
 	vec2 uv_history = project_point(pastPersmat, world_position).xy * 0.5 + 0.5;
 
 	outData = uv - uv_history;
+
+	/* Encode to unsigned normalized 16bit texture. */
+	outData = outData * 0.5 + 0.5;
 }