1 files changed, 79 insertions, 0 deletions
diff --git a/source/blender/gpu/intern/gpu_texture_private.hh b/source/blender/gpu/intern/gpu_texture_private.hh
index 207f3919a50..de639d0c435 100644
--- a/source/blender/gpu/intern/gpu_texture_private.hh
+++ b/source/blender/gpu/intern/gpu_texture_private.hh
@@ -25,6 +25,8 @@
 
 #include "BLI_assert.h"
 
+#include "GPU_vertex_buffer.h"
+
 #include "gpu_framebuffer_private.hh"
 
 namespace blender {
@@ -460,5 +462,82 @@ inline eGPUFrameBufferBits to_framebuffer_bits(eGPUTextureFormat tex_format)
   }
 }
 
+static inline eGPUTextureFormat to_texture_format(const GPUVertFormat *format)
+{
+  if (format->attr_len > 1 || format->attr_len == 0) {
+    BLI_assert(!"Incorrect vertex format for buffer texture");
+    return GPU_DEPTH_COMPONENT24;
+  }
+  switch (format->attrs[0].comp_len) {
+    case 1:
+      switch (format->attrs[0].comp_type) {
+        case GPU_COMP_I8:
+          return GPU_R8I;
+        case GPU_COMP_U8:
+          return GPU_R8UI;
+        case GPU_COMP_I16:
+          return GPU_R16I;
+        case GPU_COMP_U16:
+          return GPU_R16UI;
+        case GPU_COMP_I32:
+          return GPU_R32I;
+        case GPU_COMP_U32:
+          return GPU_R32UI;
+        case GPU_COMP_F32:
+          return GPU_R32F;
+        default:
+          break;
+      }
+      break;
+    case 2:
+      switch (format->attrs[0].comp_type) {
+        case GPU_COMP_I8:
+          return GPU_RG8I;
+        case GPU_COMP_U8:
+          return GPU_RG8UI;
+        case GPU_COMP_I16:
+          return GPU_RG16I;
+        case GPU_COMP_U16:
+          return GPU_RG16UI;
+        case GPU_COMP_I32:
+          return GPU_RG32I;
+        case GPU_COMP_U32:
+          return GPU_RG32UI;
+        case GPU_COMP_F32:
+          return GPU_RG32F;
+        default:
+          break;
+      }
+      break;
+    case 3:
+      /* Not supported until GL 4.0 */
+      break;
+    case 4:
+      switch (format->attrs[0].comp_type) {
+        case GPU_COMP_I8:
+          return GPU_RGBA8I;
+        case GPU_COMP_U8:
+          return GPU_RGBA8UI;
+        case GPU_COMP_I16:
+          return GPU_RGBA16I;
+        case GPU_COMP_U16:
+          return GPU_RGBA16UI;
+        case GPU_COMP_I32:
+          return GPU_RGBA32I;
+        case GPU_COMP_U32:
+          return GPU_RGBA32UI;
+        case GPU_COMP_F32:
+          return GPU_RGBA32F;
+        default:
+          break;
+      }
+      break;
+    default:
+      break;
+  }
+  BLI_assert(!"Unsupported vertex format for buffer texture");
+  return GPU_DEPTH_COMPONENT24;
+}
+
 }  // namespace gpu
 }  // namespace blender