GPU: remove 'GPU_SHADER_2D_SMOOTH_COLOR'

The only real difference between `GPU_SHADER_2D_SMOOTH_COLOR` and
`GPU_SHADER_3D_SMOOTH_COLOR` is that in the vertex shader the 2D
version uses `vec4(pos, 0.0, 1.0)` and the 3D version uses
`vec4(pos, 1.0)`.

But VBOs with 2D attributes work perfectly in shaders that use 3D
attributes. Components not specified are filled with components from
`vec4(0.0, 0.0, 0.0, 1.0)`.

So there is no real benefit to having two different shader versions.

This will simplify porting shaders to python as it will not be
necessary to use a 3D and a 2D version of the shaders.

In python the new name for '2D_SMOOTH_COLOR' and '3D_SMOOTH_COLOR'
is 'SMOOTH_COLOR', but the old names still work for backward
compatibility.

3 files changed, 0 insertions, 33 deletions

diff --git a/source/blender/gpu/shaders/gpu_shader_2D_smooth_color_frag.glsl b/source/blender/gpu/shaders/gpu_shader_2D_smooth_color_frag.glsl
deleted file mode 100644
index 8690ba0767a..00000000000
--- a/source/blender/gpu/shaders/gpu_shader_2D_smooth_color_frag.glsl
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma BLENDER_REQUIRE(gpu_shader_colorspace_lib.glsl)
-
-void main()
-{
-  fragColor = finalColor;
-  fragColor = blender_srgb_to_framebuffer_space(fragColor);
-}
diff --git a/source/blender/gpu/shaders/gpu_shader_2D_smooth_color_vert.glsl b/source/blender/gpu/shaders/gpu_shader_2D_smooth_color_vert.glsl
deleted file mode 100644
index cf948bb2533..00000000000
--- a/source/blender/gpu/shaders/gpu_shader_2D_smooth_color_vert.glsl
+++ /dev/null
@@ -1,6 +0,0 @@
-
-void main()
-{
-  gl_Position = ModelViewProjectionMatrix * vec4(pos, 0.0, 1.0);
-  finalColor = color;
-}
diff --git a/source/blender/gpu/shaders/infos/gpu_shader_2D_smooth_color_info.hh b/source/blender/gpu/shaders/infos/gpu_shader_2D_smooth_color_info.hh
deleted file mode 100644
index d6edeef0dfb..00000000000
--- a/source/blender/gpu/shaders/infos/gpu_shader_2D_smooth_color_info.hh
+++ /dev/null
@@ -1,20 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later
- * Copyright 2022 Blender Foundation. All rights reserved. */
-
-/** \file
- * \ingroup gpu
- */
-
-#include "gpu_interface_info.hh"
-#include "gpu_shader_create_info.hh"
-
-GPU_SHADER_CREATE_INFO(gpu_shader_2D_smooth_color)
-    .vertex_in(0, Type::VEC2, "pos")
-    .vertex_in(1, Type::VEC4, "color")
-    .vertex_out(smooth_color_iface)
-    .fragment_out(0, Type::VEC4, "fragColor")
-    .push_constant(Type::MAT4, "ModelViewProjectionMatrix")
-    .vertex_source("gpu_shader_2D_smooth_color_vert.glsl")
-    .fragment_source("gpu_shader_2D_smooth_color_frag.glsl")
-    .additional_info("gpu_srgb_to_framebuffer_space")
-    .do_static_compilation(true);