GPUShader: Manually validate sampler count

This happens on NVidia GPUs, using more textures than the maximum allowed
by the gl will NOT trigger a linking issue (maybe because of bindless
texture implementation?).

So in this case we manually count the number of samplers per shader stage
and compare it against the GL limit. We discard the shader if the sampler
count is too high. This shows the user something is wrong with the shader.

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/gpu/GPU_extensions.h b/source/blender/gpu/GPU_extensions.h
index 23ac95775d7..1059ba06953 100644
--- a/source/blender/gpu/GPU_extensions.h
+++ b/source/blender/gpu/GPU_extensions.h
@@ -41,6 +41,9 @@ extern "C" {
 int GPU_max_texture_size(void);
 int GPU_max_texture_layers(void);
 int GPU_max_textures(void);
+int GPU_max_textures_vert(void);
+int GPU_max_textures_geom(void);
+int GPU_max_textures_frag(void);
 float GPU_max_texture_anisotropy(void);
 int GPU_max_color_texture_samples(void);
 int GPU_max_cube_map_size(void);