GPU: Add RGB10_A2 format support

Nice format to output high definition normals or normalized colors.

source/blender/draw/intern/draw_manager_texture.c

@@ -43,6 +43,7 @@ static bool drw_texture_format_supports_framebuffer(eGPUTextureFormat format)
     case GPU_RG16F:
     case GPU_RG16I:
     case GPU_RG32F:
+    case GPU_RGB10_A2:
     case GPU_R11F_G11F_B10F:
     case GPU_RGBA8:
     case GPU_RGBA16:

source/blender/gpu/GPU_texture.h

@@ -115,14 +115,14 @@ typedef enum eGPUTextureFormat {
   GPU_R16, /* Max texture buffer format. */
 
   /* Special formats texture & renderbuffer */
-#if 0
   GPU_RGB10_A2,
-  GPU_RGB10_A2UI,
-#endif
   GPU_R11F_G11F_B10F,
   GPU_DEPTH32F_STENCIL8,
   GPU_DEPTH24_STENCIL8,
   GPU_SRGB8_A8,
+#if 0
+  GPU_RGB10_A2UI,
+#endif
 
   /* Texture only format */
   GPU_RGB16F,
@@ -175,6 +175,7 @@ typedef enum eGPUDataFormat {
   GPU_DATA_UBYTE,
   GPU_DATA_UINT_24_8,
   GPU_DATA_10_11_11_REV,
+  GPU_DATA_2_10_10_10_REV,
 } eGPUDataFormat;
 
 unsigned int GPU_texture_memory_usage_get(void);

source/blender/gpu/intern/gpu_texture_private.hh

@@ -283,6 +283,7 @@ inline size_t to_bytesize(eGPUTextureFormat format)
     case GPU_RGBA8UI:
     case GPU_RGBA8:
     case GPU_SRGB8_A8:
+    case GPU_RGB10_A2:
     case GPU_R11F_G11F_B10F:
     case GPU_R32F:
     case GPU_R32UI:
@@ -368,6 +369,7 @@ inline int to_component_len(eGPUTextureFormat format)
     case GPU_RGBA16:
     case GPU_RGBA32F:
     case GPU_SRGB8_A8:
+    case GPU_RGB10_A2:
       return 4;
     case GPU_RGB16F:
     case GPU_R11F_G11F_B10F:
@@ -395,6 +397,7 @@ inline size_t to_bytesize(eGPUDataFormat data_format)
       return 4;
     case GPU_DATA_UINT_24_8:
     case GPU_DATA_10_11_11_REV:
+    case GPU_DATA_2_10_10_10_REV:
       return 4;
     default:
       BLI_assert(!"Data format incorrect or unsupported\n");
@@ -432,6 +435,8 @@ inline bool validate_data_format(eGPUTextureFormat tex_format, eGPUDataFormat da
     case GPU_RGBA8UI:
     case GPU_SRGB8_A8:
       return ELEM(data_format, GPU_DATA_UBYTE, GPU_DATA_FLOAT);
+    case GPU_RGB10_A2:
+      return ELEM(data_format, GPU_DATA_2_10_10_10_REV, GPU_DATA_FLOAT);
     case GPU_R11F_G11F_B10F:
       return ELEM(data_format, GPU_DATA_10_11_11_REV, GPU_DATA_FLOAT);
     default:
@@ -464,6 +469,8 @@ inline eGPUDataFormat to_data_format(eGPUTextureFormat tex_format)
     case GPU_RGBA8UI:
     case GPU_SRGB8_A8:
       return GPU_DATA_UBYTE;
+    case GPU_RGB10_A2:
+      return GPU_DATA_2_10_10_10_REV;
     case GPU_R11F_G11F_B10F:
       return GPU_DATA_10_11_11_REV;
     default:

source/blender/gpu/opengl/gl_texture.hh

@@ -158,6 +158,8 @@ inline GLenum to_gl_internal_format(eGPUTextureFormat format)
     case GPU_R16:
       return GL_R16;
     /* Special formats texture & renderbuffer */
+    case GPU_RGB10_A2:
+      return GL_RGB10_A2;
     case GPU_R11F_G11F_B10F:
       return GL_R11F_G11F_B10F;
     case GPU_DEPTH32F_STENCIL8:
@@ -280,6 +282,8 @@ inline GLenum to_gl(eGPUDataFormat format)
       return GL_UNSIGNED_BYTE;
     case GPU_DATA_UINT_24_8:
       return GL_UNSIGNED_INT_24_8;
+    case GPU_DATA_2_10_10_10_REV:
+      return GL_UNSIGNED_INT_2_10_10_10_REV;
     case GPU_DATA_10_11_11_REV:
       return GL_UNSIGNED_INT_10F_11F_11F_REV;
     default:
@@ -333,6 +337,7 @@ inline GLenum to_gl_data_format(eGPUTextureFormat format)
     case GPU_RGBA16:
     case GPU_RGBA16F:
     case GPU_RGBA32F:
+    case GPU_RGB10_A2:
       return GL_RGBA;
     case GPU_DEPTH24_STENCIL8:
     case GPU_DEPTH32F_STENCIL8: