OpenGL: fix GPU_SHADER_SIMPLE_LIGHTING_SMOOTH_COLOR

The fragment shader expects a normal, but the vertex shader was not providing one.

Fix: added a new vertex shader that has normals + smooth color interpolation.

I also split gpu_shader_3D_vert in two:
- one with just position
- one with position + normal

For each of the builtin shaders, we should be able to look at the GLSL and tell exactly what it's doing. Using #defines and #ifdefs for rendering options makes the shaders hard to read and easy to break.

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/gpu/CMakeLists.txt b/source/blender/gpu/CMakeLists.txt
index f2b13d860dd..8d1d45d34cc 100644
--- a/source/blender/gpu/CMakeLists.txt
+++ b/source/blender/gpu/CMakeLists.txt
@@ -147,8 +147,10 @@ data_to_c_simple(shaders/gpu_shader_image_depth_linear_frag.glsl SRC)
 data_to_c_simple(shaders/gpu_shader_image_interlace_frag.glsl SRC)
 data_to_c_simple(shaders/gpu_shader_3D_image_vert.glsl SRC)
 data_to_c_simple(shaders/gpu_shader_3D_vert.glsl SRC)
+data_to_c_simple(shaders/gpu_shader_3D_normal_vert.glsl SRC)
 data_to_c_simple(shaders/gpu_shader_3D_flat_color_vert.glsl SRC)
 data_to_c_simple(shaders/gpu_shader_3D_smooth_color_vert.glsl SRC)
+data_to_c_simple(shaders/gpu_shader_3D_normal_smooth_color_vert.glsl SRC)
 data_to_c_simple(shaders/gpu_shader_3D_smooth_color_frag.glsl SRC)
 data_to_c_simple(shaders/gpu_shader_3D_passthrough_vert.glsl SRC)
 data_to_c_simple(shaders/gpu_shader_3D_clipped_uniform_color_vert.glsl SRC)