From fc883e0b0449509ba2e1c5d14d187feee098ab34 Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Thu, 18 Jan 2024 19:33:18 -0800
Subject: Simplify game callbacks.
---
gfx-app/include/gfx/gfx_app.h | 39 ++++++++++++++++++++++++++++++++++-----
1 file changed, 34 insertions(+), 5 deletions(-)
(limited to 'gfx-app')
diff --git a/gfx-app/include/gfx/gfx_app.h b/gfx-app/include/gfx/gfx_app.h
index 0033bde..3c544fa 100644
--- a/gfx-app/include/gfx/gfx_app.h
+++ b/gfx-app/include/gfx/gfx_app.h
@@ -2,6 +2,7 @@
#include <stdbool.h>
+/// Application settings.
typedef struct GfxAppDesc {
int argc; // Number of application arguments.
const char** argv; // Application arguments.
@@ -12,12 +13,19 @@ typedef struct GfxAppDesc {
const char* title; // Window title.
} GfxAppDesc;
+typedef bool (*GfxAppInit)(const GfxAppDesc*, void** app_state);
+typedef void (*GfxAppUpdate)(void* app_state, double t, double dt);
+typedef void (*GfxAppRender)(void* app_state);
+typedef void (*GfxAppResize)(void* app_state, int width, int height);
+typedef void (*GfxAppShutdown)(void* app_state);
+
+/// Application callback functions.
typedef struct GfxAppCallbacks {
- bool (*init)(const GfxAppDesc*, void** app_state);
- void (*update)(void* app_state, double t, double dt);
- void (*render)(void* app_state);
- void (*resize)(void* app_state, int width, int height);
- void (*shutdown)(void* app_state);
+ GfxAppInit init;
+ GfxAppUpdate update;
+ GfxAppRender render;
+ GfxAppResize resize;
+ GfxAppShutdown shutdown;
} GfxAppCallbacks;
/// Create a window with an OpenGL context and run the main loop.
@@ -25,3 +33,24 @@ bool gfx_app_run(const GfxAppDesc*, const GfxAppCallbacks*);
/// Get the mouse coordinates relative to the app's window.
void gfx_app_get_mouse_position(double* x, double* y);
+
+/// Define a main function that initializes and puts the application in a loop.
+/// See also: gfx_app_run().
+#define GFX_APP_MAIN(WIDTH, HEIGHT, MAX_FPS) \
+ int main(int argc, const char** argv) { \
+ gfx_app_run( \
+ &(GfxAppDesc){ \
+ .argc = argc, \
+ .argv = argv, \
+ .width = WIDTH, \
+ .height = HEIGHT, \
+ .max_fps = MAX_FPS, \
+ .update_delta_time = MAX_FPS > 0 ? 1.0 / (double)MAX_FPS : 0.0}, \
+ &(GfxAppCallbacks){ \
+ .init = (GfxAppInit)app_init, \
+ .update = (GfxAppUpdate)app_update, \
+ .render = (GfxAppRender)app_render, \
+ .resize = (GfxAppResize)app_resize, \
+ .shutdown = (GfxAppShutdown)app_end}); \
+ return 0; \
+ }
--
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