From 967d52ea6ac288e50e284477a8f9c55125ecf46b Mon Sep 17 00:00:00 2001
From: UnknownShadow200 <unknownshadow200@gmail.com>
Date: Thu, 1 Aug 2024 19:51:21 +1000
Subject: [PATCH] Virtual cursor: Implement in-game too

---
 src/VirtualCursor.h | 59 +++++++++++++++++++++++++++++++++++++++------
 1 file changed, 51 insertions(+), 8 deletions(-)

diff --git a/src/VirtualCursor.h b/src/VirtualCursor.h
index 261e698ce..ad960166f 100644
--- a/src/VirtualCursor.h
+++ b/src/VirtualCursor.h
@@ -3,24 +3,66 @@
 #include "Drawer2D.h"
 #include "Input.h"
 #include "LBackend.h"
+#include "Graphics.h"
+#include "Game.h"
+
 static cc_bool vc_hooked;
+static struct Texture vc_texture;
+static GfxResourceID  vc_vb;
 
 #define CURSOR_SIZE   1
 #define CURSOR_EXTENT 5
 
-static void VirtualCursor_Display2D(struct Context2D* ctx) {
-	int x, y;
-	LBackend_MarkAllDirty();
-
-	x = Pointers[0].x;
-	y = Pointers[0].y;
-	
+static void VirtualCursor_Draw(struct Context2D* ctx, int x, int y) {
 	Context2D_Clear(ctx, BITMAPCOLOR_WHITE,
 					x - CURSOR_EXTENT, y - CURSOR_SIZE, CURSOR_EXTENT * 2, CURSOR_SIZE * 3);
 	Context2D_Clear(ctx, BITMAPCOLOR_WHITE,
 					x - CURSOR_SIZE, y - CURSOR_EXTENT, CURSOR_SIZE * 3, CURSOR_EXTENT * 2);
 }
 
+static void VirtualCursor_Display2D(struct Context2D* ctx) {
+	LBackend_MarkAllDirty();
+	VirtualCursor_Draw(ctx, Pointers[0].x, Pointers[0].y);
+}
+
+static void VirtualCursor_MakeTexture(void) {
+	struct Context2D ctx;
+	Context2D_Alloc(&ctx, CURSOR_EXTENT * 2, CURSOR_EXTENT * 2);
+	{
+		VirtualCursor_Draw(&ctx, CURSOR_EXTENT, CURSOR_EXTENT);
+		Context2D_MakeTexture(&vc_texture, &ctx);
+	}
+	Context2D_Free(&ctx);
+}
+
+/* TODO hook into context lost etc */
+static void VirtualCursor_Display3D(float delta) {
+	if (!DisplayInfo.CursorVisible) return;
+	
+	if (!vc_vb) {
+		vc_vb = Gfx_CreateDynamicVb(VERTEX_FORMAT_TEXTURED, 4);
+		if (!vc_vb) return;
+	}	
+	
+	if (!vc_texture.ID) {
+		VirtualCursor_MakeTexture();
+		if (!vc_texture.ID) return;
+	}
+	
+	vc_texture.x = Pointers[0].x - CURSOR_EXTENT;
+	vc_texture.y = Pointers[0].y - CURSOR_EXTENT;
+	int X = vc_texture.x, Y = vc_texture.y;
+	
+	Gfx_SetVertexFormat(VERTEX_FORMAT_TEXTURED);
+	Gfx_BindTexture(vc_texture.ID);
+	
+	struct VertexTextured* data = (struct VertexTextured*)Gfx_LockDynamicVb(vc_vb, VERTEX_FORMAT_TEXTURED, 4);
+	struct VertexTextured** ptr = &data;
+	Gfx_Make2DQuad(&vc_texture, PACKEDCOL_WHITE, ptr);
+	Gfx_UnlockDynamicVb(vc_vb);
+	Gfx_DrawVb_IndexedTris(4);
+}
+
 static void VirtualCursor_SetPosition(int x, int y) {
 	x = max(0, min(x, Window_Main.Width  - 1));
 	y = max(0, min(y, Window_Main.Height - 1));
@@ -28,7 +70,8 @@ static void VirtualCursor_SetPosition(int x, int y) {
 
 	if (x == Pointers[0].x && y == Pointers[0].y) return;
 	Pointer_SetPosition(0, x, y);
-	LBackend_Hooks[3] = VirtualCursor_Display2D;
+	LBackend_Hooks[3]   = VirtualCursor_Display2D;
+	Game.Draw2DHooks[3] = VirtualCursor_Display3D;
 	
 	/* TODO better dirty region tracking */
 	if (launcherMode) LBackend_Redraw();