From 19f6f130f9bc60cb89155dcff11c34c52714416f Mon Sep 17 00:00:00 2001
From: quou <quou@disroot.org>
Date: Mon, 30 Dec 2024 10:17:36 +1100
Subject: Staged_Buffer

---
 video.cpp | 38 ++++++++++++++++++++++++++++++++++++++
 video.hpp | 17 +++++++++++++++++
 2 files changed, 55 insertions(+)

diff --git a/video.cpp b/video.cpp
index 09261b5..d5efb34 100644
--- a/video.cpp
+++ b/video.cpp
@@ -3900,3 +3900,41 @@ Vram_Allocator::Allocation Vram_Allocator::alloc(
 void Vram_Allocator::free(Allocation& alloc) {
 	alloc.chunk->free = true;
 }
+
+void Staged_Buffer::init(
+	Device* dev,
+	const char* name,
+	int s,
+	int flags
+) {
+	size = s;
+	stage = dev->create_buffer(
+		name,
+		size,
+		Buffer_Flags::copy_src |
+		Buffer_Flags::cpu_readwrite
+	);
+	gpuonly = dev->create_buffer(
+		name,
+		size,
+		Buffer_Flags::copy_dst |
+		flags
+	);
+}
+
+void Staged_Buffer::destroy(Device* dev) {
+	dev->destroy_buffer(stage);
+	dev->destroy_buffer(gpuonly);
+}
+
+void* Staged_Buffer::map(Device* dev) {
+	return dev->map_buffer(stage, 0, size);
+}
+
+void Staged_Buffer::unmap(Device* dev) {
+	dev->unmap_buffer(stage);
+}
+
+void Staged_Buffer::update(Context& ctx) {
+	ctx.copy(gpuonly, stage);
+}
diff --git a/video.hpp b/video.hpp
index aa196a7..60127f3 100644
--- a/video.hpp
+++ b/video.hpp
@@ -492,4 +492,21 @@ struct Shader : public Asset {
 	int descriptor_stage(int slot);
 };
 
+struct Staged_Buffer {
+	Buffer_Id stage;
+	Buffer_Id gpuonly;
+	int size;
+
+	void init(
+		Device* dev,
+		const char* name,
+		int size,
+		int flags
+	);
+	void destroy(Device* dev);
+	void* map(Device* dev);
+	void unmap(Device* dev);
+	void update(Context& ctx);
+};
+
 #endif
-- 
cgit v1.2.3-54-g00ecf