Keyframe: Reduce GPU context switches.

This change reduces the GPU context switches when drawing keyframes.
In the previous situation the keyframe blocks and keyframe keys were
drawn per channel. With this patch first all the keyframe blocks are
drawn for all channels and after that the keyframe keys are collected
for all channels and send to the GPU in a single draw call.

1 files changed, 7 insertions, 10 deletions

diff --git a/source/blender/editors/interface/interface_icons.c b/source/blender/editors/interface/interface_icons.c
index 2d59bfb92c8..f739830cfdb 100644
--- a/source/blender/editors/interface/interface_icons.c
+++ b/source/blender/editors/interface/interface_icons.c
@@ -299,13 +299,14 @@ static void vicon_keytype_draw_wrapper(
   const float yco = y + h / 2 + 0.5f;
 
   GPUVertFormat *format = immVertexFormat();
-  const uint pos_id = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
-  const uint size_id = GPU_vertformat_attr_add(format, "size", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
-  uint color_id = GPU_vertformat_attr_add(
+  KeyframeShaderBindings sh_bindings;
+  sh_bindings.pos_id = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
+  sh_bindings.size_id = GPU_vertformat_attr_add(format, "size", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
+  sh_bindings.color_id = GPU_vertformat_attr_add(
       format, "color", GPU_COMP_U8, 4, GPU_FETCH_INT_TO_FLOAT_UNIT);
-  uint outline_color_id = GPU_vertformat_attr_add(
+  sh_bindings.outline_color_id = GPU_vertformat_attr_add(
       format, "outlineColor", GPU_COMP_U8, 4, GPU_FETCH_INT_TO_FLOAT_UNIT);
-  const uint flags_id = GPU_vertformat_attr_add(format, "flags", GPU_COMP_U32, 1, GPU_FETCH_INT);
+  sh_bindings.flags_id = GPU_vertformat_attr_add(format, "flags", GPU_COMP_U32, 1, GPU_FETCH_INT);
 
   GPU_program_point_size(true);
   immBindBuiltinProgram(GPU_SHADER_KEYFRAME_DIAMOND);
@@ -326,11 +327,7 @@ static void vicon_keytype_draw_wrapper(
                       key_type,
                       KEYFRAME_SHAPE_BOTH,
                       alpha,
-                      pos_id,
-                      size_id,
-                      color_id,
-                      outline_color_id,
-                      flags_id,
+                      &sh_bindings,
                       handle_type,
                       KEYFRAME_EXTREME_NONE);