Added optional OSD (SDL)

SDL/gui.c

@@ -198,11 +198,13 @@ static void draw_char(uint32_t *buffer, unsigned width, unsigned height, unsigne
 }
 
 static signed scroll = 0;
-static void draw_unbordered_text(uint32_t *buffer, unsigned width, unsigned height, unsigned x, signed y, const char *string, uint32_t color)
+static void draw_unbordered_text(uint32_t *buffer, unsigned width, unsigned height, unsigned x, signed y, const char *string, uint32_t color, bool is_osd)
 {
+    if (!is_osd) {
         y -= scroll;
+    }
     unsigned orig_x = x;
-    unsigned y_offset = (GB_get_screen_height(&gb) - 144) / 2;
+    unsigned y_offset = is_osd? 0 : (GB_get_screen_height(&gb) - 144) / 2;
     while (*string) {
         if (*string == '\n') {
             x = orig_x;
@@ -215,21 +217,39 @@ static void draw_unbordered_text(uint32_t *buffer, unsigned width, unsigned heig
             break;
         }
         
-        draw_char(&buffer[(signed)(x + width * y)], width, height, *string, color, &buffer[width * y_offset], &buffer[width * (y_offset + 144)]);
+        draw_char(&buffer[(signed)(x + width * y)], width, height, *string, color, &buffer[width * y_offset], &buffer[width * (is_osd? GB_get_screen_height(&gb) : y_offset + 144)]);
         x += GLYPH_WIDTH;
         string++;
     }
 }
 
-static void draw_text(uint32_t *buffer, unsigned width, unsigned height, unsigned x, signed y, const char *string, uint32_t color, uint32_t border)
+void draw_text(uint32_t *buffer, unsigned width, unsigned height, unsigned x, signed y, const char *string, uint32_t color, uint32_t border, bool is_osd)
 {
-    draw_unbordered_text(buffer, width, height, x - 1, y, string, border);
+    draw_unbordered_text(buffer, width, height, x - 1, y, string, border, is_osd);
-    draw_unbordered_text(buffer, width, height, x + 1, y, string, border);
+    draw_unbordered_text(buffer, width, height, x + 1, y, string, border, is_osd);
-    draw_unbordered_text(buffer, width, height, x, y - 1, string, border);
+    draw_unbordered_text(buffer, width, height, x, y - 1, string, border, is_osd);
-    draw_unbordered_text(buffer, width, height, x, y + 1, string, border);
+    draw_unbordered_text(buffer, width, height, x, y + 1, string, border, is_osd);
-    draw_unbordered_text(buffer, width, height, x, y, string, color);
+    draw_unbordered_text(buffer, width, height, x, y, string, color, is_osd);
 }
 
+const char *osd_text = NULL;
+unsigned osd_countdown = 0;
+unsigned osd_text_lines = 1;
+
+void show_osd_text(const char *text)
+{
+    osd_text_lines = 1;
+    osd_text = text;
+    osd_countdown = 30;
+    while (*text++) {
+        if (*text == '\n') {
+            osd_text_lines++;
+            osd_countdown += 30;
+        }
+    }
+}
+
+
 enum decoration {
     DECORATION_NONE,
     DECORATION_SELECTION,
@@ -239,14 +259,14 @@ enum decoration {
 static void draw_text_centered(uint32_t *buffer, unsigned width, unsigned height, unsigned y, const char *string, uint32_t color, uint32_t border, enum decoration decoration)
 {
     unsigned x = width / 2 - (unsigned) strlen(string) * GLYPH_WIDTH / 2;
-    draw_text(buffer, width, height, x, y, string, color, border);
+    draw_text(buffer, width, height, x, y, string, color, border, false);
     switch (decoration) {
         case DECORATION_SELECTION:
-            draw_text(buffer, width, height, x - GLYPH_WIDTH, y, SELECTION_STRING, color, border);
+            draw_text(buffer, width, height, x - GLYPH_WIDTH, y, SELECTION_STRING, color, border, false);
             break;
         case DECORATION_ARROWS:
-            draw_text(buffer, width, height, x - GLYPH_WIDTH, y, LEFT_ARROW_STRING, color, border);
+            draw_text(buffer, width, height, x - GLYPH_WIDTH, y, LEFT_ARROW_STRING, color, border, false);
-            draw_text(buffer, width, height, width - x, y, RIGHT_ARROW_STRING, color, border);
+            draw_text(buffer, width, height, width - x, y, RIGHT_ARROW_STRING, color, border, false);
             break;
             
         case DECORATION_NONE:
@@ -743,7 +763,7 @@ static void cycle_filter_backwards(unsigned index)
     }
 
 }
-const char *current_filter_name(unsigned index)
+static const char *current_filter_name(unsigned index)
 {
     if (!uses_gl()) return "Requires OpenGL 3.2+";
     unsigned i = 0;
@@ -782,13 +802,24 @@ static void cycle_blending_mode_backwards(unsigned index)
     }
 }
 
-const char *blending_mode_string(unsigned index)
+static const char *blending_mode_string(unsigned index)
 {
     if (!uses_gl()) return "Requires OpenGL 3.2+";
     return (const char *[]){"Disabled", "Simple", "Accurate"}
     [configuration.blending_mode];
 }
 
+static void toggle_osd(unsigned index)
+{
+    osd_countdown = 0;
+    configuration.osd = !configuration.osd;
+}
+
+static const char *current_osd_mode(unsigned index)
+{
+    return configuration.osd? "Enabled" : "Disabled";
+}
+
 static const struct menu_item graphics_menu[] = {
     {"Scaling Mode:", cycle_scaling, current_scaling_mode, cycle_scaling_backwards},
     {"Default Window Scale:", cycle_default_scale, current_default_scale, cycle_default_scale_backwards},
@@ -798,6 +829,8 @@ static const struct menu_item graphics_menu[] = {
     {"Frame Blending:", cycle_blending_mode, blending_mode_string, cycle_blending_mode_backwards},
     {"Mono Palette:", cycle_palette, current_palette, cycle_palette_backwards},
     {"Display Border:", cycle_border_mode, current_border_mode, cycle_border_mode_backwards},
+    {"On-Screen Display:", toggle_osd, current_osd_mode, toggle_osd},
+
     {"Back", return_to_root_menu},
     {NULL,}
 };
@@ -1574,7 +1607,7 @@ void run_gui(bool is_running)
                     }
                     break;
                 case SHOWING_HELP:
-                    draw_text(pixels, width, height, 2 + x_offset, 2 + y_offset, help[current_help_page], gui_palette_native[3], gui_palette_native[0]);
+                    draw_text(pixels, width, height, 2 + x_offset, 2 + y_offset, help[current_help_page], gui_palette_native[3], gui_palette_native[0], false);
                     break;
                 case WAITING_FOR_KEY:
                     draw_text_centered(pixels, width, height, 68 + y_offset, "Press a Key", gui_palette_native[3], gui_palette_native[0], DECORATION_NONE);

SDL/gui.h

@@ -119,6 +119,9 @@ typedef struct {
     char bootrom_path[4096];
     uint8_t interference_volume;
     GB_rtc_mode_t rtc_mode;
+    
+    /* v0.14.4 */
+    bool osd;
 } configuration_t;
 
 extern configuration_t configuration;
@@ -140,4 +143,10 @@ static SDL_Scancode event_hotkey_code(SDL_Event *event)
     return event->key.keysym.scancode;
 }
 
+void draw_text(uint32_t *buffer, unsigned width, unsigned height, unsigned x, signed y, const char *string, uint32_t color, uint32_t border, bool is_osd);
+void show_osd_text(const char *text);
+extern const char *osd_text;
+extern unsigned osd_countdown;
+extern unsigned osd_text_lines;
+
 #endif

SDL/main.c

@@ -233,8 +233,7 @@ static void handle_events(GB_gameboy_t *gb)
             }
                 break;
                 
-            case SDL_JOYHATMOTION:
+            case SDL_JOYHATMOTION: {
-            {
                 uint8_t value = event.jhat.value;
                 int8_t updown =
                 value == SDL_HAT_LEFTUP || value == SDL_HAT_UP || value == SDL_HAT_RIGHTUP ? -1 : (value == SDL_HAT_LEFTDOWN || value == SDL_HAT_DOWN || value == SDL_HAT_RIGHTDOWN ? 1 : 0);
@@ -350,7 +349,12 @@ static void handle_events(GB_gameboy_t *gb)
                 break;
         }
     }
-    }
+}
+
+static uint32_t rgb_encode(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b)
+{
+    return SDL_MapRGB(pixel_format, r, g, b);
+}
 
 static void vblank(GB_gameboy_t *gb)
 {
@@ -362,6 +366,26 @@ static void vblank(GB_gameboy_t *gb)
         clock_mutliplier += 1.0/16;
         GB_set_clock_multiplier(gb, clock_mutliplier);
     }
+    
+    if (turbo_down) {
+        show_osd_text("Fast forward...");
+    }
+    else if (underclock_down) {
+        show_osd_text("Slow motion...");
+    }
+    else if (rewind_down) {
+        show_osd_text("Rewinding...");
+    }
+    
+    if (osd_countdown && configuration.osd) {
+        unsigned width = GB_get_screen_width(gb);
+        unsigned height = GB_get_screen_height(gb);
+        draw_text(active_pixel_buffer,
+                  width, height, 8, height - 8 - osd_text_lines * 12, osd_text,
+                  rgb_encode(gb, 255, 255, 255), rgb_encode(gb, 0, 0, 0),
+                  true);
+        osd_countdown--;
+    }
     if (configuration.blending_mode) {
         render_texture(active_pixel_buffer, previous_pixel_buffer);
         uint32_t *temp = active_pixel_buffer;
@@ -376,12 +400,6 @@ static void vblank(GB_gameboy_t *gb)
     handle_events(gb);
 }
 
-
-static uint32_t rgb_encode(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b)
-{
-    return SDL_MapRGB(pixel_format, r, g, b);
-}
-
 static void rumble(GB_gameboy_t *gb, double amp)
 {
     SDL_HapticRumblePlay(haptic, amp, 250);
@@ -455,6 +473,9 @@ static bool handle_pending_command(void)
                                false,
                                success? SDL_MESSAGEBOX_INFORMATION : SDL_MESSAGEBOX_ERROR,
                                success? "Notice" : "Error");
+            if (success) {
+                show_osd_text(pending_command == GB_SDL_LOAD_STATE_COMMAND? "State loaded" : "State saved");
+            }
             return false;
         }
     
@@ -466,6 +487,9 @@ static bool handle_pending_command(void)
                                success? SDL_MESSAGEBOX_INFORMATION : SDL_MESSAGEBOX_ERROR,
                                success? "Notice" : "Error");
             SDL_free(dropped_state_file);
+            if (success) {
+                show_osd_text("State loaded");
+            }
             return false;
             
         case GB_SDL_NO_COMMAND:
@@ -579,6 +603,12 @@ restart:
     }
     end_capturing_logs(true, error, SDL_MESSAGEBOX_WARNING, "Warning");
     
+    static char start_text[64];
+    static char title[17];
+    GB_get_rom_title(&gb, title);
+    sprintf(start_text, "SameBoy v" GB_VERSION "\n%s\n%08X", title, GB_get_rom_crc32(&gb));
+    show_osd_text(start_text);
+
     
     /* Configure battery */
     char battery_save_path[path_length + 5]; /* At the worst case, size is strlen(path) + 4 bytes for .sav + NULL */