shader: read image descriptors indexed by workgroup

Co-authored-by: Çağatay Güçlü <33038942+defektu@users.noreply.github.com>

src/graphics/shader/shader.h

@@ -148,6 +148,7 @@ struct ShaderVertexInputInfo {
 struct ShaderComputeInputInfo: ShaderWorkgroupInputInfo {
 	uint8_t            float_mode                 = 0xc0;
 	uint32_t           dispatch_threads_num[3]    = {0, 0, 0};
+	uint32_t           workgroup_counts[3]        = {0, 0, 0};
 	bool               group_id[3]                = {false, false, false};
 	bool               dispatch_thread_dimensions = false;
 	int                thread_ids_num             = 0;