le readme

src/imgui.cpp

@@ -1842,6 +1842,7 @@ imgui_init
     Preview* preview,
     Settings* settings,
     Tool* tool,
+    UndoStack* undoStack,
     SDL_Window* window,
     SDL_GLContext* glContext
 )
@@ -1859,6 +1860,7 @@ imgui_init
 	self->preview = preview;
 	self->settings = settings;
 	self->tool = tool;
+	self->undoStack = undoStack;
 	self->window = window;
 	self->glContext = glContext;
 
@@ -1923,6 +1925,9 @@ imgui_tick(Imgui* self)
 
 	_imgui_taskbar(self);
 	_imgui_dock(self);
+
+	if (key_press(&self->input->keyboard, INPUT_KEYS[INPUT_UNDO]))
+		undo_stack_pop(self->undoStack, self->anm2);
 }
 
 void

src/imgui.h

@@ -8,6 +8,7 @@
 #include "input.h"
 #include "settings.h"
 #include "tool.h"
+#include "undo_stack.h"
 
 #define IMGUI_IMPL_OPENGL_LOADER_CUSTOM
 #define IMGUI_ENABLE_DOCKING
@@ -100,6 +101,7 @@ struct Imgui
     Preview* preview = NULL;
     Settings* settings = NULL;
     Tool* tool = NULL;
+    UndoStack* undoStack = NULL;
     SDL_Window* window = NULL;
     SDL_GLContext* glContext = NULL;
     bool isSwap = false;
@@ -121,6 +123,7 @@ imgui_init
     Preview* preview,
     Settings* settings,
     Tool* tool,
+    UndoStack* undoStack,
     SDL_Window* window,
     SDL_GLContext* glContext
 );

src/input.h

@@ -233,7 +233,7 @@ enum KeyType
         KEY_RGUI = 231
 };
 
-#define INPUT_COUNT (INPUT_ZOOM_OUT + 1)
+#define INPUT_COUNT (INPUT_UNDO + 1)
 enum InputType
 {
     INPUT_PAN,
@@ -247,7 +247,8 @@ enum InputType
     INPUT_ROTATE_LEFT,
     INPUT_ROTATE_RIGHT,
     INPUT_ZOOM_IN,
-    INPUT_ZOOM_OUT
+    INPUT_ZOOM_OUT,
+    INPUT_UNDO
 };
 
 static const KeyType INPUT_KEYS[INPUT_COUNT]
@@ -263,7 +264,8 @@ static const KeyType INPUT_KEYS[INPUT_COUNT]
     KEY_Q,
     KEY_W,
     KEY_1,
-    KEY_2
+    KEY_2,
+    KEY_Z
 };
 
 struct Keyboard

src/snapshots.cpp

@@ -0,0 +1,24 @@
+#include "undo_stack.h"
+
+void 
+undo_stack_push(Snapshots* self, Anm2* anm2)
+{
+    if (self->top >= UNDO_STACK_MAX)
+    {
+        memmove(&self->snapshots[0], &self->snapshots[1], sizeof(Anm2) * (UNDO_STACK_MAX - 1));
+        self->top = UNDO_STACK_MAX - 1;
+    }
+
+    self->snapshots[self->top++] = *anm2;
+}
+
+bool
+undo_stack_pop(Snapshots* self, Anm2* anm2)
+{
+    if (self->top == 0)
+        return false;
+
+    *anm2 = self->snapshots[--self->top];
+
+    return true;
+}

src/snapshots.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "anm2.h"
+
+#define SNAPSHOT_STACK_MAX 100
+
+struct SnapshotStack
+{
+    Anm2 snapshots[SNAPSHOT_STACK_MAX];
+    s32 top = 0;
+};
+
+struct Snapshots
+{
+    SnapshotStack undoStack;
+    SnapshotStack redoStack;
+}
+
+
+
+void undo_stack_push(UndoStack* self, Anm2* anm2);
+bool undo_stack_pop(UndoStack* self, Anm2* anm2);

src/state.cpp

@@ -143,6 +143,7 @@ init(State* state)
 		&state->preview,
 		&state->settings,
 		&state->tool,
+		&state->undoStack,
 		state->window,
 		&state->glContext
 	);

src/state.h

@@ -22,6 +22,7 @@ struct State
 	Resources resources;
 	Settings settings;
 	Tool tool;
+	UndoStack undoStack;
 	bool isArgument = false;
 	bool isRunning = true;
 	char argument[PATH_MAX] = STRING_EMPTY;