ui: Start logo animation on appearing

ui/xemu-custom-widgets.c

@@ -287,8 +287,9 @@ void render_controller_port(float frame_x, float frame_y, int i, uint32_t port_c
     glUseProgram(0);
 }
 
-void render_logo(uint32_t primary_color, uint32_t secondary_color, uint32_t fill_color)
+void render_logo(uint32_t time, uint32_t primary_color, uint32_t secondary_color, uint32_t fill_color)
 {
+    s_logo->time = time;
     glUseProgram(s_logo->prog);
     glBindVertexArray(s->vao);
     glBlendFunc(GL_ONE, GL_ZERO);

ui/xemu-custom-widgets.h

@@ -36,7 +36,7 @@ void initialize_custom_ui_rendering(void);
 void render_meter(struct decal_shader *s, float x, float y, float width, float height, float p, uint32_t color_bg, uint32_t color_fg);
 void render_controller(float frame_x, float frame_y, uint32_t primary_color, uint32_t secondary_color, struct controller_state *state);
 void render_controller_port(float frame_x, float frame_y, int i, uint32_t port_color);
-void render_logo(uint32_t primary_color, uint32_t secondary_color, uint32_t fill_color);
+void render_logo(uint32_t time, uint32_t primary_color, uint32_t secondary_color, uint32_t fill_color);
 
 #ifdef __cplusplus
 }

ui/xemu-hud.cc

@@ -1112,6 +1112,12 @@ struct AboutWindow
             return;
         }
 
+        static uint32_t time_start = 0;
+        if (ImGui::IsWindowAppearing()) {
+            time_start = SDL_GetTicks();
+        }
+        uint32_t now = SDL_GetTicks() - time_start;
+
         ImGui::SetCursorPosY(ImGui::GetCursorPosY()-50);
         ImGui::SetCursorPosX((ImGui::GetWindowWidth()-256)/2);
 
@@ -1123,7 +1129,10 @@ struct AboutWindow
             ImVec2(t_w-x_off, t_h),
             ImVec2(x_off/t_w, t_h/t_h),
             ImVec2(t_w/t_w, 0));
-        render_logo(0x42e335ff, 0x42e335ff, 0x00000000);
+        if (ImGui::IsItemClicked()) {
+            time_start = SDL_GetTicks();
+        }
+        render_logo(now, 0x42e335ff, 0x42e335ff, 0x00000000);
         render_to_default_fb();
         ImGui::SetCursorPosX(10);
 
@@ -1186,6 +1195,12 @@ struct FirstBootWindow
             return;
         }
 
+        static uint32_t time_start = 0;
+        if (ImGui::IsWindowAppearing()) {
+            time_start = SDL_GetTicks();
+        }
+        uint32_t now = SDL_GetTicks() - time_start;
+
         ImGui::SetCursorPosY(ImGui::GetCursorPosY()-50);
         ImGui::SetCursorPosX((ImGui::GetWindowWidth()-256)/2);
 
@@ -1197,7 +1212,7 @@ struct FirstBootWindow
             ImVec2(t_w-x_off, t_h),
             ImVec2(x_off/t_w, t_h/t_h),
             ImVec2(t_w/t_w, 0));
-        render_logo(0x42e335ff, 0x42e335ff, 0x00000000);
+        render_logo(now, 0x42e335ff, 0x42e335ff, 0x00000000);
         render_to_default_fb();
         ImGui::SetCursorPosX(10);
 

ui/xemu-shaders.c

@@ -61,6 +61,7 @@ struct decal_shader *create_decal_shader(enum SHADER_TYPE type)
     s->scale = 1.4;
     s->smoothing = 1.0;
     s->outline_dist = 1.0;
+    s->time = 0;
 
     const char *vert_src =
         "#version 150 core\n"
@@ -244,7 +245,7 @@ void render_decal(
     glUniform4f(s->ColorPrimary_loc,   COL(primary,   3), COL(primary,   2), COL(primary,   1), COL(primary,   0));
     glUniform4f(s->ColorSecondary_loc, COL(secondary, 3), COL(secondary, 2), COL(secondary, 1), COL(secondary, 0));
     glUniform4f(s->ColorFill_loc,      COL(fill,      3), COL(fill,      2), COL(fill,      1), COL(fill,      0));
-    if (s->time_loc >= 0) glUniform1f(s->time_loc, SDL_GetTicks()/1000.0f);
+    if (s->time_loc >= 0) glUniform1f(s->time_loc, s->time/1000.0f);
     if (s->scale_loc >= 0) glUniform1f(s->scale_loc, s->scale);
     #undef COL
     glDrawElements(GL_TRIANGLE_FAN, 4, GL_UNSIGNED_INT, NULL);

ui/xemu-shaders.h

@@ -37,6 +37,7 @@ struct decal_shader
     float scale;
     float smoothing;
     float outline_dist;
+    uint32_t time;
 
     // GL object handles
     GLuint prog, vao, vbo, ebo;