Do some D3D12 descriptor set setup work

Backends/Graphics5/Direct3D12/Sources/kope/direct3d12/d3d12unit.cpp

@@ -2,6 +2,7 @@
 
 #include "buffer.cpp"
 #include "commandlist.cpp"
+#include "descriptorset.cpp"
 #include "device.cpp"
 #include "pipeline.cpp"
 #include "texture.cpp"

Backends/Graphics5/Direct3D12/Sources/kope/direct3d12/descriptorset.cpp

@@ -0,0 +1,2 @@
+#include "descriptorset_functions.h"
+#include "descriptorset_structs.h"

Backends/Graphics5/Direct3D12/Sources/kope/direct3d12/descriptorset_functions.h

@@ -0,0 +1,12 @@
+#ifndef KOPE_D3D12_DESCRIPTORSET_FUNCTIONS_HEADER
+#define KOPE_D3D12_DESCRIPTORSET_FUNCTIONS_HEADER
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

Backends/Graphics5/Direct3D12/Sources/kope/direct3d12/descriptorset_structs.h

@@ -0,0 +1,21 @@
+#ifndef KOPE_D3D12_DESCRIPTORSET_STRUCTS_HEADER
+#define KOPE_D3D12_DESCRIPTORSET_STRUCTS_HEADER
+
+#include "d3d12mini.h"
+
+#include <kope/util/offalloc/offalloc.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct kope_d3d12_descriptor_set {
+	oa_allocation_t allocation;
+	size_t descriptor_count;
+} kope_d3d12_descriptor_set;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

Backends/Graphics5/Direct3D12/Sources/kope/direct3d12/device.cpp

@@ -119,6 +119,16 @@ void kope_d3d12_device_create(kope_g5_device *device, const kope_g5_device_wishl
 	device->d3d12.execution_context_index = 0;
 	device->d3d12.execution_contexts[device->d3d12.execution_context_index].blocking_frame_index = 1;
 
+	{
+		D3D12_DESCRIPTOR_HEAP_DESC desc = {};
+		desc.NumDescriptors = 1024 * 10;
+		desc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
+		desc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
+		kinc_microsoft_affirm(device->d3d12.device->CreateDescriptorHeap(&desc, IID_GRAPHICS_PPV_ARGS(&device->d3d12.descriptor_sets_heap)));
+
+		oa_create(&device->d3d12.descriptor_sets_allocator, 1024 * 10, 4096);
+	}
+
 	{
 		kope_d3d12_device_create_command_list(device, &device->d3d12.management_list);
 
@@ -500,3 +510,8 @@ void kope_d3d12_device_execute_command_list(kope_g5_device *device, kope_g5_comm
 		list->d3d12.presenting = false;
 	}
 }
+
+void kope_d3d12_device_create_descriptor_set(kope_g5_device *device, uint32_t descriptor_count, kope_d3d12_descriptor_set *set) {
+	oa_allocate(&device->d3d12.descriptor_sets_allocator, descriptor_count, &set->allocation);
+	set->descriptor_count = descriptor_count;
+}

Backends/Graphics5/Direct3D12/Sources/kope/direct3d12/device_functions.h

@@ -3,6 +3,8 @@
 
 #include <kope/graphics5/device.h>
 
+#include "descriptorset_structs.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -19,6 +21,8 @@ void kope_d3d12_device_create_command_list(kope_g5_device *device, kope_g5_comma
 
 void kope_d3d12_device_create_texture(kope_g5_device *device, const kope_g5_texture_parameters *parameters, kope_g5_texture *texture);
 
+void kope_d3d12_device_create_descriptor_set(kope_g5_device *device, uint32_t descriptor_count, kope_d3d12_descriptor_set *set);
+
 kope_g5_texture *kope_d3d12_device_get_framebuffer(kope_g5_device *device);
 
 void kope_d3d12_device_execute_command_list(kope_g5_device *device, kope_g5_command_list *list);

Backends/Graphics5/Direct3D12/Sources/kope/direct3d12/device_structs.h

@@ -4,6 +4,7 @@
 #include "d3d12mini.h"
 
 #include <kope/util/indexallocator.h>
+#include <kope/util/offalloc/offalloc.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -47,6 +48,9 @@ typedef struct kope_d3d12_device {
 	HANDLE frame_event;
 	uint64_t current_frame_index;
 
+	struct ID3D12DescriptorHeap *descriptor_sets_heap;
+	oa_allocator_t descriptor_sets_allocator;
+
 	kope_g5_command_list management_list;
 } kope_d3d12_device;
 

Sources/kope/util/offalloc/offalloc.h

@@ -1,75 +1,83 @@
-// (C) Sebastian Aaltonen 2023
-// MIT License (see file: LICENSE)
-// C99 conversion by Aarni Gratseff
-// https://github.com/aarni57/offalloc
-
-#ifndef OFFALLOC_H
-#define OFFALLOC_H
-
-#include "stdint.h"
-
-#define OA_NUM_TOP_BINS 32
-#define OA_BINS_PER_LEAF 8
-#define OA_NUM_LEAF_BINS OA_NUM_TOP_BINS * OA_BINS_PER_LEAF
-
-#define OA_NO_SPACE 0xffffffff
-
-typedef uint16_t oa_index_t;
-#define OA_INVALID_INDEX (oa_index_t)0xffff
-#define OA_UNUSED (oa_index_t)0xffff
-
-typedef struct oa_allocation_t {
-    uint32_t offset;
-    oa_index_t index; // internal: node index
-} oa_allocation_t;
-
-typedef struct ao_storage_report_t {
-    uint32_t total_free_space;
-    uint32_t largest_free_region;
-} oa_storage_report_t;
-
-typedef struct ao_region_t {
-    uint32_t size;
-    uint32_t count;
-} oa_region_t;
-
-typedef struct ao_storage_report_full_t {    
-    oa_region_t free_regions[OA_NUM_LEAF_BINS];
-} oa_storage_report_full_t;
-
-typedef struct ao_node_t {
-    uint32_t data_offset;
-    uint32_t data_size; // 'used' flag stored as high bit
-    oa_index_t bin_list_prev;
-    oa_index_t bin_list_next;
-    oa_index_t neighbor_prev;
-    oa_index_t neighbor_next;
-} oa_node_t;
-
-typedef struct ao_allocator_t {
-    uint32_t size;
-    uint32_t max_allocs;
-    uint32_t free_storage;
-
-    uint32_t used_bins_top;
-    uint8_t used_bins[OA_NUM_TOP_BINS];
-    oa_index_t bin_indices[OA_NUM_LEAF_BINS];
-
-    oa_node_t *nodes;
-    oa_index_t *free_nodes;
-    uint32_t free_offset;
-} oa_allocator_t;
-
-//
-
-int oa_create(oa_allocator_t *self, uint32_t size, uint32_t max_allocs);
-void oa_destroy(oa_allocator_t *self);
-
-int oa_allocate(oa_allocator_t *self, uint32_t size, oa_allocation_t *allocation);
-void oa_free(oa_allocator_t *self, oa_allocation_t *allocation);
-
-uint32_t oa_allocation_size(oa_allocator_t *self, const oa_allocation_t *allocation);
-void oa_storage_report(const oa_allocator_t *self, oa_storage_report_t *report);
-void oa_storage_report_full(const oa_allocator_t *self, oa_storage_report_full_t *report);
-
-#endif
+// (C) Sebastian Aaltonen 2023
+// MIT License (see file: LICENSE)
+// C99 conversion by Aarni Gratseff
+// https://github.com/aarni57/offalloc
+
+#ifndef OFFALLOC_H
+#define OFFALLOC_H
+
+#include "stdint.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define OA_NUM_TOP_BINS 32
+#define OA_BINS_PER_LEAF 8
+#define OA_NUM_LEAF_BINS OA_NUM_TOP_BINS *OA_BINS_PER_LEAF
+
+#define OA_NO_SPACE 0xffffffff
+
+typedef uint16_t oa_index_t;
+#define OA_INVALID_INDEX (oa_index_t)0xffff
+#define OA_UNUSED (oa_index_t)0xffff
+
+typedef struct oa_allocation_t {
+	uint32_t offset;
+	oa_index_t index; // internal: node index
+} oa_allocation_t;
+
+typedef struct ao_storage_report_t {
+	uint32_t total_free_space;
+	uint32_t largest_free_region;
+} oa_storage_report_t;
+
+typedef struct ao_region_t {
+	uint32_t size;
+	uint32_t count;
+} oa_region_t;
+
+typedef struct ao_storage_report_full_t {
+	oa_region_t free_regions[OA_NUM_LEAF_BINS];
+} oa_storage_report_full_t;
+
+typedef struct ao_node_t {
+	uint32_t data_offset;
+	uint32_t data_size; // 'used' flag stored as high bit
+	oa_index_t bin_list_prev;
+	oa_index_t bin_list_next;
+	oa_index_t neighbor_prev;
+	oa_index_t neighbor_next;
+} oa_node_t;
+
+typedef struct ao_allocator_t {
+	uint32_t size;
+	uint32_t max_allocs;
+	uint32_t free_storage;
+
+	uint32_t used_bins_top;
+	uint8_t used_bins[OA_NUM_TOP_BINS];
+	oa_index_t bin_indices[OA_NUM_LEAF_BINS];
+
+	oa_node_t *nodes;
+	oa_index_t *free_nodes;
+	uint32_t free_offset;
+} oa_allocator_t;
+
+//
+
+int oa_create(oa_allocator_t *self, uint32_t size, uint32_t max_allocs);
+void oa_destroy(oa_allocator_t *self);
+
+int oa_allocate(oa_allocator_t *self, uint32_t size, oa_allocation_t *allocation);
+void oa_free(oa_allocator_t *self, oa_allocation_t *allocation);
+
+uint32_t oa_allocation_size(oa_allocator_t *self, const oa_allocation_t *allocation);
+void oa_storage_report(const oa_allocator_t *self, oa_storage_report_t *report);
+void oa_storage_report_full(const oa_allocator_t *self, oa_storage_report_full_t *report);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

Sources/kope/util/utilunit.c

@@ -1 +1,2 @@
-#include "indexallocator.c"
+#include "indexallocator.c"
+#include "offalloc/offalloc.c"