Add delta_time_seconds to a few renderers (#628)

demo/allegro5/nuklear_allegro5.h

@@ -66,6 +66,7 @@ static struct nk_allegro5 {
     int touch_down_id;
     struct nk_context ctx;
     struct nk_buffer cmds;
+    float delta_time_seconds_last;
 } allegro5;
 
 
@@ -177,6 +178,11 @@ nk_allegro5_render()
 {
     const struct nk_command *cmd;
 
+    /* Update the timer */
+    float now = (float)al_get_time();
+    allegro5.ctx.delta_time_seconds = now - allegro5.delta_time_seconds_last;
+    allegro5.delta_time_seconds_last = now;
+
     al_set_target_backbuffer(allegro5.dsp);
 
     nk_foreach(cmd, &allegro5.ctx)
@@ -498,6 +504,7 @@ nk_allegro5_init(NkAllegro5Font *allegro5font, ALLEGRO_DISPLAY *dsp,
     allegro5.height = height;
     allegro5.is_touch_down = 0;
     allegro5.touch_down_id = -1;
+    allegro5.delta_time_seconds_last = (float)al_get_time();
 
     nk_init_default(&allegro5.ctx, font);
     allegro5.ctx.clip.copy = nk_allegro5_clipboard_copy;

demo/common/overview.c

@@ -3,11 +3,11 @@ overview(struct nk_context *ctx)
 {
     /* window flags */
     static nk_bool show_menu = nk_true;
-    static nk_flags window_flags = NK_WINDOW_TITLE|NK_WINDOW_BORDER|NK_WINDOW_SCALABLE|NK_WINDOW_MOVABLE|NK_WINDOW_MINIMIZABLE;
+    static nk_flags window_flags = NK_WINDOW_TITLE|NK_WINDOW_BORDER|NK_WINDOW_SCALABLE|NK_WINDOW_MOVABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_SCROLL_AUTO_HIDE;
     nk_flags actual_window_flags = 0;
 
     /* widget flags */
-	static nk_bool disable_widgets = nk_false;
+    static nk_bool disable_widgets = nk_false;
 
     /* popups */
     static enum nk_style_header_align header_align = NK_HEADER_RIGHT;

demo/glfw_opengl2/nuklear_glfw_gl2.h

@@ -79,6 +79,7 @@ static struct nk_glfw {
     double last_button_click;
     int is_double_click_down;
     struct nk_vec2 double_click_pos;
+    float delta_time_seconds_last;
 } glfw;
 
 NK_INTERN void
@@ -273,6 +274,8 @@ nk_glfw3_init(GLFWwindow *win, enum nk_glfw_init_state init_state)
     glfw.is_double_click_down = nk_false;
     glfw.double_click_pos = nk_vec2(0, 0);
 
+    glfw.delta_time_seconds_last = (float)glfwGetTime();
+
     return &glfw.ctx;
 }
 
@@ -303,6 +306,11 @@ nk_glfw3_new_frame(void)
     struct nk_context *ctx = &glfw.ctx;
     struct GLFWwindow *win = glfw.win;
 
+    /* update the timer */
+    float delta_time_now = (float)glfwGetTime();
+    glfw.ctx.delta_time_seconds = delta_time_now - glfw.delta_time_seconds_last;
+    glfw.delta_time_seconds_last = delta_time_now;
+
     glfwGetWindowSize(win, &glfw.width, &glfw.height);
     glfwGetFramebufferSize(win, &glfw.display_width, &glfw.display_height);
     glfw.fb_scale.x = (float)glfw.display_width/(float)glfw.width;

demo/glfw_opengl3/nuklear_glfw_gl3.h

@@ -53,6 +53,7 @@ struct nk_glfw {
     double last_button_click;
     int is_double_click_down;
     struct nk_vec2 double_click_pos;
+    float delta_time_seconds_last;
 };
 
 NK_API struct nk_context*   nk_glfw3_init(struct nk_glfw* glfw, GLFWwindow *win, enum nk_glfw_init_state);
@@ -389,6 +390,8 @@ nk_glfw3_init(struct nk_glfw* glfw, GLFWwindow *win, enum nk_glfw_init_state ini
     glfw->is_double_click_down = nk_false;
     glfw->double_click_pos = nk_vec2(0, 0);
 
+    glfw->delta_time_seconds_last = (float)glfwGetTime();
+
     return &glfw->ctx;
 }
 
@@ -419,6 +422,11 @@ nk_glfw3_new_frame(struct nk_glfw* glfw)
     struct nk_context *ctx = &glfw->ctx;
     struct GLFWwindow *win = glfw->win;
 
+    /* update the timer */
+    float delta_time_now = (float)glfwGetTime();
+    glfw->ctx.delta_time_seconds = delta_time_now - glfw->delta_time_seconds_last;
+    glfw->delta_time_seconds_last = delta_time_now;
+
     glfwGetWindowSize(win, &glfw->width, &glfw->height);
     glfwGetFramebufferSize(win, &glfw->display_width, &glfw->display_height);
     glfw->fb_scale.x = (float)glfw->display_width/(float)glfw->width;

demo/glfw_vulkan/nuklear_glfw_vulkan.h

@@ -379,6 +379,7 @@ static struct nk_glfw {
     double last_button_click;
     int is_double_click_down;
     struct nk_vec2 double_click_pos;
+    float delta_time_seconds_last;
 } glfw;
 
 struct Mat4f {
@@ -1254,6 +1255,11 @@ NK_API void nk_glfw3_new_frame(void) {
     struct nk_context *ctx = &glfw.ctx;
     struct GLFWwindow *win = glfw.win;
 
+    /* update the timer */
+    float delta_time_now = (float)glfwGetTime();
+    glfw.ctx.delta_time_seconds = delta_time_now - glfw.delta_time_seconds_last;
+    glfw.delta_time_seconds_last = delta_time_now;
+
     nk_input_begin(ctx);
     for (i = 0; i < glfw.text_len; ++i)
         nk_input_unicode(ctx, glfw.text[i]);

demo/rawfb/nuklear_rawfb.h

@@ -1033,6 +1033,7 @@ nk_rawfb_render(const struct rawfb_context *rawfb,
                 const unsigned char enable_clear)
 {
     const struct nk_command *cmd;
+
     if (enable_clear)
         nk_rawfb_clear(rawfb, clear);
 

demo/sdl_opengl2/nuklear_sdl_gl2.h

@@ -51,7 +51,7 @@ static struct nk_sdl {
     struct nk_sdl_device ogl;
     struct nk_context ctx;
     struct nk_font_atlas atlas;
-    float time_of_last_frame;
+    Uint64 time_of_last_frame;
 } sdl;
 
 NK_INTERN void
@@ -75,8 +75,8 @@ nk_sdl_render(enum nk_anti_aliasing AA)
     int display_width, display_height;
     struct nk_vec2 scale;
 
-    float now = ((float)SDL_GetTicks64()) / 1000;
-    sdl.ctx.delta_time_seconds = now - sdl.time_of_last_frame;
+    Uint64 now = SDL_GetTicks64();
+    sdl.ctx.delta_time_seconds = (float)(now - sdl.time_of_last_frame) / 1000;
     sdl.time_of_last_frame = now;
 
     SDL_GetWindowSize(sdl.win, &width, &height);
@@ -217,7 +217,7 @@ nk_sdl_init(SDL_Window *win)
     sdl.ctx.clip.paste = nk_sdl_clipboard_paste;
     sdl.ctx.clip.userdata = nk_handle_ptr(0);
     nk_buffer_init_default(&sdl.ogl.cmds);
-    sdl.time_of_last_frame = ((float)SDL_GetTicks64()) / 1000;
+    sdl.time_of_last_frame = SDL_GetTicks64();
     return &sdl.ctx;
 }
 

demo/sdl_opengl3/nuklear_sdl_gl3.h

@@ -67,7 +67,7 @@ static struct nk_sdl {
     struct nk_sdl_device ogl;
     struct nk_context ctx;
     struct nk_font_atlas atlas;
-    float time_of_last_frame;
+    Uint64 time_of_last_frame;
 } sdl;
 
 #ifdef __APPLE__
@@ -199,8 +199,8 @@ nk_sdl_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_b
         { -1.0f,  1.0f,  0.0f, 1.0f },
     };
 
-    float now = ((float)SDL_GetTicks64()) / 1000;
-    sdl.ctx.delta_time_seconds = now - sdl.time_of_last_frame;
+    Uint64 now = SDL_GetTicks64();
+    sdl.ctx.delta_time_seconds = (float)(now - sdl.time_of_last_frame) / 1000;
     sdl.time_of_last_frame = now;
 
     SDL_GetWindowSize(sdl.win, &width, &height);
@@ -326,7 +326,7 @@ nk_sdl_init(SDL_Window *win)
     sdl.ctx.clip.paste = nk_sdl_clipboard_paste;
     sdl.ctx.clip.userdata = nk_handle_ptr(0);
     nk_sdl_device_create();
-    sdl.time_of_last_frame = ((float)SDL_GetTicks64()) / 1000;
+    sdl.time_of_last_frame = SDL_GetTicks64();
     return &sdl.ctx;
 }
 

demo/sdl_opengles2/nuklear_sdl_gles2.h

@@ -71,7 +71,7 @@ static struct nk_sdl {
     struct nk_sdl_device ogl;
     struct nk_context ctx;
     struct nk_font_atlas atlas;
-    float time_of_last_frame;
+    Uint64 time_of_last_frame;
 } sdl;
 
 
@@ -187,8 +187,8 @@ nk_sdl_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_b
         { -1.0f,  1.0f,  0.0f, 1.0f },
     };
 
-    float now = ((float)SDL_GetTicks64()) / 1000;
-    sdl.ctx.delta_time_seconds = now - sdl.time_of_last_frame;
+    Uint64 now = SDL_GetTicks64();
+    sdl.ctx.delta_time_seconds = (float)(now - sdl.time_of_last_frame) / 1000;
     sdl.time_of_last_frame = now;
 
     SDL_GetWindowSize(sdl.win, &width, &height);
@@ -326,7 +326,7 @@ nk_sdl_init(SDL_Window *win)
     sdl.ctx.clip.paste = nk_sdl_clipboard_paste;
     sdl.ctx.clip.userdata = nk_handle_ptr(0);
     nk_sdl_device_create();
-    sdl.time_of_last_frame = ((float)SDL_GetTicks64()) / 1000;
+    sdl.time_of_last_frame = SDL_GetTicks64();
     return &sdl.ctx;
 }
 

demo/sdl_renderer/nuklear_sdl_renderer.h

@@ -64,10 +64,9 @@ static struct nk_sdl {
     struct nk_sdl_device ogl;
     struct nk_context ctx;
     struct nk_font_atlas atlas;
+    Uint64 time_of_last_frame;
 } sdl;
 
-
-
 NK_INTERN void
 nk_sdl_device_upload_atlas(const void *image, int width, int height)
 {
@@ -113,6 +112,11 @@ nk_sdl_render(enum nk_anti_aliasing AA)
             {NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_sdl_vertex, col)},
             {NK_VERTEX_LAYOUT_END}
         };
+
+        Uint64 now = SDL_GetTicks64();
+        sdl.ctx.delta_time_seconds = (float)(now - sdl.time_of_last_frame) / 1000;
+        sdl.time_of_last_frame = now;
+
         NK_MEMSET(&config, 0, sizeof(config));
         config.vertex_layout = vertex_layout;
         config.vertex_size = sizeof(struct nk_sdl_vertex);
@@ -241,6 +245,7 @@ nk_sdl_init(SDL_Window *win, SDL_Renderer *renderer)
 #endif
     sdl.win = win;
     sdl.renderer = renderer;
+    sdl.time_of_last_frame = SDL_GetTicks64();
     nk_init_default(&sdl.ctx, 0);
     sdl.ctx.clip.copy = nk_sdl_clipboard_copy;
     sdl.ctx.clip.paste = nk_sdl_clipboard_paste;