Merge pull request #94233 from ChristopheClaustre/screenshot_compat_broken_with_hdr

Fix black `get_texture()` on viewport in compatibility mode with HDR enabled

drivers/gles3/storage/texture_storage.cpp

@@ -1030,10 +1030,8 @@ Ref<Image> TextureStorage::texture_2d_get(RID p_texture) const {
 			if (texture->compressed) {
 				glPixelStorei(GL_PACK_ALIGNMENT, 4);
 				glGetCompressedTexImage(texture->target, i, &w[ofs]);
-
 			} else {
 				glPixelStorei(GL_PACK_ALIGNMENT, 1);
-
 				glGetTexImage(texture->target, i, texture->gl_format_cache, texture->gl_type_cache, &w[ofs]);
 			}
 		}
@@ -2123,7 +2121,7 @@ void TextureStorage::_update_render_target(RenderTarget *rt) {
 				texture->layers = 1;
 			}
 			texture->gl_format_cache = rt->color_format;
-			texture->gl_type_cache = GL_UNSIGNED_BYTE;
+			texture->gl_type_cache = !rt->hdr ? GL_UNSIGNED_BYTE : GL_FLOAT; // to set HDR format size to 8 and keep 4 for LDR format
 			texture->gl_internal_format_cache = rt->color_internal_format;
 			texture->tex_id = rt->color;
 			texture->width = rt->size.x;