EEVEE: Replace octahedron reflection probe by cubemap array

We implement cubemap array support for EEVEE's lightcache reflection probes.
This removes stretched texels and bottom hemisphere seams artifacts caused
by the octahedral projection previously used.

This introduce versioning code for the lightcache which will discard any
lightcache version that is not compatible.

Differential Revision: https://developer.blender.org/D7066

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/gpu/GPU_texture.h b/source/blender/gpu/GPU_texture.h
index bd15030d135..892452a2738 100644
--- a/source/blender/gpu/GPU_texture.h
+++ b/source/blender/gpu/GPU_texture.h
@@ -162,6 +162,12 @@ GPUTexture *GPU_texture_create_nD(int w,
                                   int samples,
                                   const bool can_rescale,
                                   char err_out[256]);
+GPUTexture *GPU_texture_cube_create(int w,
+                                    int d,
+                                    const void *pixels,
+                                    eGPUTextureFormat tex_format,
+                                    eGPUDataFormat gpu_data_format,
+                                    char err_out[256]);
 
 GPUTexture *GPU_texture_create_1d(int w,
                                   eGPUTextureFormat data_type,
@@ -185,6 +191,9 @@ GPUTexture *GPU_texture_create_cube(int w,
                                     eGPUTextureFormat data_type,
                                     const float *pixels,
                                     char err_out[256]);
+GPUTexture *GPU_texture_create_cube_array(
+    int w, int d, eGPUTextureFormat data_type, const float *pixels, char err_out[256]);
+
 GPUTexture *GPU_texture_create_from_vertbuf(struct GPUVertBuf *vert);
 GPUTexture *GPU_texture_create_buffer(eGPUTextureFormat data_type, const uint buffer);
 
@@ -252,6 +261,7 @@ void GPU_texture_orig_size_set(GPUTexture *tex, int w, int h);
 int GPU_texture_layers(const GPUTexture *tex);
 eGPUTextureFormat GPU_texture_format(const GPUTexture *tex);
 int GPU_texture_samples(const GPUTexture *tex);
+bool GPU_texture_array(const GPUTexture *tex);
 bool GPU_texture_cube(const GPUTexture *tex);
 bool GPU_texture_depth(const GPUTexture *tex);
 bool GPU_texture_stencil(const GPUTexture *tex);