Added background image and ability to set it from the image viewer

Makefile

@@ -29,6 +29,7 @@ SRCS = \
 	libs/miniz/miniz.c \
 	menu/actions.c \
 	menu/assets.c \
+	menu/components/background.c \
 	menu/menu.c \
 	menu/mp3_player.c \
 	menu/path.c \

src/menu/components/background.c

@@ -0,0 +1,202 @@
+#include <fatfs/ff.h>
+#include <stdlib.h>
+
+#include "components.h"
+#include "utils/fs.h"
+
+
+#define CACHE_METADATA_MAGIC    (0x424B4731)
+
+
+typedef struct {
+    uint32_t magic;
+    uint32_t width;
+    uint32_t height;
+    uint32_t size;
+} cache_metadata_t;
+
+
+static void load_from_cache (component_background_t *c) {
+    if (!c->cache_location) {
+        return;
+    }
+
+    FIL fil;
+    UINT bytes_read;
+
+    if (f_open(&fil, strip_sd_prefix(c->cache_location), FA_READ) != FR_OK) {
+        return;
+    }
+
+    cache_metadata_t cache_metadata;
+
+    if ((f_read(&fil, &cache_metadata, sizeof(cache_metadata), &bytes_read) != FR_OK) || (bytes_read != sizeof(cache_metadata))) {
+        f_close(&fil);
+        return;
+    }
+
+    uint32_t display_width = display_get_width();
+    uint32_t display_height = display_get_height();
+
+    if (cache_metadata.magic != CACHE_METADATA_MAGIC || cache_metadata.width > display_width || cache_metadata.height > display_height) {
+        f_close(&fil);
+        return;
+    }
+
+    c->image = calloc(1, sizeof(surface_t));
+    *c->image = surface_alloc(FMT_RGBA16, cache_metadata.width, cache_metadata.height);
+
+    if (cache_metadata.size != (c->image->height * c->image->stride)) {
+        surface_free(c->image);
+        free(c->image);
+        c->image = NULL;
+        f_close(&fil);
+        return;
+    }
+
+    if ((f_read(&fil, c->image->buffer, cache_metadata.size, &bytes_read) != FR_OK) || (bytes_read != cache_metadata.size)) {
+        surface_free(c->image);
+        free(c->image);
+        c->image = NULL;
+    }
+
+    f_close(&fil);
+}
+
+static void save_to_cache (component_background_t *c) {
+    if (!c->cache_location || !c->image) {
+        return;
+    }
+
+    FIL fil;
+    UINT bytes_written;
+    if (f_open(&fil, strip_sd_prefix(c->cache_location), FA_WRITE | FA_CREATE_ALWAYS) != FR_OK) {
+        return;
+    }
+
+    cache_metadata_t cache_metadata = {
+        .magic = CACHE_METADATA_MAGIC,
+        .width = c->image->width,
+        .height = c->image->height,
+        .size = (c->image->height * c->image->stride),
+    };
+
+    f_write(&fil, &cache_metadata, sizeof(cache_metadata), &bytes_written);
+    f_write(&fil, c->image->buffer, cache_metadata.size, &bytes_written);
+
+    f_close(&fil);
+}
+
+static void prepare_background (component_background_t *c) {
+    if (!c->image || c->image->width == 0 || c->image->height == 0) {
+        return;
+    }
+
+    uint32_t display_width = display_get_width();
+    uint32_t display_height = display_get_height();
+
+    int16_t display_center_x = (display_width / 2);
+    int16_t display_center_y = (display_height / 2);
+
+    int16_t image_center_x = (c->image->width / 2);
+    int16_t image_center_y = (c->image->height / 2);
+
+    // Darken the image
+    rdpq_attach(c->image, NULL);
+    rdpq_mode_push();
+        rdpq_set_mode_standard();
+        rdpq_set_prim_color(RGBA32(0x00, 0x00, 0x00, 0xA0));
+        rdpq_mode_combiner(RDPQ_COMBINER_FLAT);
+        rdpq_mode_blender(RDPQ_BLENDER_MULTIPLY);
+        rdpq_fill_rectangle(0, 0, c->image->width, c->image->height);
+    rdpq_mode_pop();
+    rdpq_detach();
+
+    // Prepare display list
+    rspq_block_begin();
+    rdpq_mode_push();
+        if ((c->image->width != display_width) || (c->image->height != display_height)) {
+            rdpq_set_mode_fill(RGBA32(0x00, 0x00, 0x00, 0xFF));
+        }
+        if (c->image->width != display_width) {
+            rdpq_fill_rectangle(
+                0,
+                display_center_y - image_center_y,
+                display_center_x - image_center_x,
+                display_center_y + image_center_y
+            );
+            rdpq_fill_rectangle(
+                display_center_x + image_center_x - (c->image->width % 2),
+                display_center_y - image_center_y,
+                display_width,
+                display_center_y + image_center_y
+            );
+        }
+        if (c->image->height != display_height) {
+            rdpq_fill_rectangle(
+                0,
+                0,
+                display_width,
+                display_center_y - image_center_y
+            );
+            rdpq_fill_rectangle(
+                0,
+                display_center_y + image_center_y - (c->image->height % 2),
+                display_width,
+                display_height
+            );
+        }
+        rdpq_set_mode_copy(false);
+        rdpq_tex_blit(c->image, display_center_x - image_center_x, display_center_y - image_center_y, NULL);
+    rdpq_mode_pop();
+    c->image_display_list = rspq_block_end();
+}
+
+static void display_list_free (void *arg) {
+    rspq_block_free((rspq_block_t *) (arg));
+}
+
+
+component_background_t *component_background_create (char *cache_location) {
+    component_background_t *c = calloc(1, sizeof(component_background_t));
+
+    c->cache_location = cache_location;
+
+    load_from_cache(c);
+
+    prepare_background(c);
+
+    return c;
+}
+
+void component_background_replace_image (component_background_t *c, surface_t *image) {
+    if (!c) {
+        return;
+    }
+
+    if (c->image) {
+        surface_free(c->image);
+        free(c->image);
+        c->image = NULL;
+    }
+
+    if (c->image_display_list) {
+        rdpq_call_deferred(display_list_free, c->image_display_list);
+        c->image_display_list = NULL;
+    }
+
+    c->image = image;
+
+    save_to_cache(c);
+
+    prepare_background(c);
+}
+
+void component_background_draw (component_background_t *c) {
+    if (!c || !c->image_display_list) {
+        rdpq_clear(RGBA32(0x00, 0x00, 0x00, 0xFF));
+        return;
+    }
+
+    rspq_block_run(c->image_display_list);
+}

src/menu/components/components.h

@@ -0,0 +1,32 @@
+/**
+ * @file components.h
+ * @brief Menu Components
+ * @ingroup menu
+ */
+
+#ifndef COMPONENTS_H__
+#define COMPONENTS_H__
+
+
+#include <libdragon.h>
+
+
+/**
+ * @addtogroup 
+ * @{ menu_components
+ */
+
+typedef struct {
+    char *cache_location;
+    surface_t *image;
+    rspq_block_t *image_display_list;
+} component_background_t;
+
+component_background_t *component_background_create (char *cache_location);
+void component_background_replace_image (component_background_t *c, surface_t *image);
+void component_background_draw (component_background_t *c);
+
+/** @} */ /* menu_components */
+
+
+#endif

src/menu/menu_state.h

@@ -9,6 +9,7 @@
 
 
 #include "boot/boot.h"
+#include "components/components.h"
 #include "flashcart/flashcart.h"
 #include "path.h"
 #include "settings.h"
@@ -82,6 +83,10 @@ typedef struct {
         int entries;
         int selected;
     } browser;
+
+    struct {
+        component_background_t *background;
+    } components;
 } menu_t;
 
 

src/menu/views/browser.c

@@ -4,6 +4,7 @@
 #include <fatfs/ff.h>
 #include <libdragon.h>
 
+#include "../components/components.h"
 #include "fragments/fragments.h"
 #include "utils/fs.h"
 #include "views.h"
@@ -252,7 +253,6 @@ static void draw (menu_t *menu, surface_t *d) {
     const int text_other_actions_x = text_x + 450;
     const int highlight_offset = 2;
 
-    const color_t bg_color = RGBA32(0x00, 0x00, 0x00, 0xFF);
     const color_t highlight_color = RGBA32(0x3F, 0x3F, 0x3F, 0xFF);
     const color_t text_color = RGBA32(0xFF, 0xFF, 0xFF, 0xFF);
     const color_t directory_color = RGBA32(0xFF, 0xFF, 0x70, 0xFF);
@@ -270,7 +270,9 @@ static void draw (menu_t *menu, surface_t *d) {
     }
 
     rdpq_attach(d, NULL);
-    rdpq_clear(bg_color);
+
+    // Background
+    component_background_draw(menu->components.background);
 
     // Layout
     fragment_borders(d);

src/menu/views/credits.c

@@ -1,5 +1,6 @@
 #include <libdragon.h>
 
+#include "../components/components.h"
 #include "fragments/fragments.h"
 #include "views.h"
 
@@ -21,11 +22,12 @@ static void draw (menu_t *menu, surface_t *d) {
     const int text_x = layout->offset_x + layout->offset_text_x;
     int text_y = layout->offset_y + layout->offset_text_y;
 
-    const color_t bg_color = RGBA32(0x00, 0x00, 0x00, 0xFF);
     const color_t text_color = RGBA32(0xFF, 0xFF, 0xFF, 0xFF);
 
     rdpq_attach(d, NULL);
-    rdpq_clear(bg_color);
+
+    // Background
+    component_background_draw(menu->components.background);
 
     // Layout
     fragment_borders(d);

src/menu/views/file_info.c

@@ -2,6 +2,7 @@
 #include <libdragon.h>
 #include <stdlib.h>
 
+#include "../components/components.h"
 #include "../png_decoder.h"
 #include "../rom_database.h"
 #include "fragments/fragments.h"
@@ -282,11 +283,12 @@ static void draw (menu_t *menu, surface_t *d) {
     const int text_x = layout->offset_x + layout->offset_text_x;
     int text_y = layout->offset_y + layout->offset_text_y;
 
-    const color_t bg_color = RGBA32(0x00, 0x00, 0x00, 0xFF);
     const color_t text_color = RGBA32(0xFF, 0xFF, 0xFF, 0xFF);
 
     rdpq_attach(d, NULL);
-    rdpq_clear(bg_color);
+
+    // Background
+    component_background_draw(menu->components.background);
 
     // Layout
     fragment_borders(d);

src/menu/views/image_viewer.c

@@ -1,27 +1,38 @@
 #include <libdragon.h>
 #include <stdlib.h>
 
+#include "../components/components.h"
 #include "../png_decoder.h"
 #include "fragments/fragments.h"
 #include "views.h"
 
 
 static bool image_loading;
+static bool image_set_as_background;
 static surface_t *image;
 
 
 static void process (menu_t *menu) {
     if (menu->actions.back) {
         menu->next_mode = MENU_MODE_BROWSER;
+    } else if (menu->actions.enter) {
+        if (image) {
+            menu->next_mode = MENU_MODE_BROWSER;
+            image_set_as_background = true;
+        }
     }
 }
 
 static void draw (menu_t *menu, surface_t *d) {
-    rdpq_attach_clear(d, NULL);
-
     if (!image) {
+        rdpq_attach(d, NULL);
+
+        component_background_draw(menu->components.background);
+
         fragment_loader(d);
     } else {
+        rdpq_attach_clear(d, NULL);
+
         uint16_t x = (d->width / 2) - (image->width / 2);
         uint16_t y = (d->height / 2) - (image->height / 2);
 
@@ -48,14 +59,19 @@ static void deinit (menu_t *menu) {
     }
 
     if (image) {
-        surface_free(image);
+        if (image_set_as_background) {
-        free(image);
+            component_background_replace_image(menu->components.background, image);
+        } else {
+            surface_free(image);
+            free(image);
+        }
     }
 }
 
 
 void view_image_viewer_init (menu_t *menu) {
     image_loading = false;
+    image_set_as_background = false;
     image = NULL;
 
     path_t *path = path_clone(menu->browser.directory);

src/menu/views/load.c

@@ -1,5 +1,6 @@
 #include <libdragon.h>
 
+#include "../components/components.h"
 #include "../rom_database.h"
 #include "boot/boot.h"
 #include "flashcart/flashcart.h"
@@ -200,11 +201,12 @@ static void draw (menu_t *menu, surface_t *d) {
     const int text_x = layout->offset_x + layout->offset_text_x;
     int text_y = layout->offset_y + layout->offset_text_y;
 
-    const color_t bg_color = RGBA32(0x00, 0x00, 0x00, 0xFF);
     const color_t text_color = RGBA32(0xFF, 0xFF, 0xFF, 0xFF);
 
     rdpq_attach(d, NULL);
-    rdpq_clear(bg_color);
+
+    // Background
+    component_background_draw(menu->components.background);
 
     if (load_pending) {
         fragment_loader(d);

src/menu/views/music_player.c

@@ -1,5 +1,6 @@
 #include <libdragon.h>
 
+#include "../components/components.h"
 #include "../mp3_player.h"
 #include "fragments/fragments.h"
 #include "views.h"
@@ -75,11 +76,12 @@ static void draw (menu_t *menu, surface_t *d) {
     const int text_x = layout->offset_x + layout->offset_text_x;
     int text_y = layout->offset_y + layout->offset_text_y;
 
-    const color_t bg_color = RGBA32(0x00, 0x00, 0x00, 0xFF);
     const color_t text_color = RGBA32(0xFF, 0xFF, 0xFF, 0xFF);
 
     rdpq_attach(d, NULL);
-    rdpq_clear(bg_color);
+
+    // Background
+    component_background_draw(menu->components.background);
 
     // Layout
     fragment_borders(d);

src/menu/views/startup.c

@@ -1,8 +1,15 @@
 #include <libdragon.h>
 
+#include "../components/components.h"
+#include "utils/fs.h"
 #include "views.h"
 
 
+#define CACHE_DIRECTORY     "sd:/menu/cache"
+
+#define BACKGROUND_CACHE    "sd:/menu/cache/background.data"
+
+
 static void process (menu_t *menu) {
     menu->next_mode = MENU_MODE_BROWSER;
 }
@@ -12,12 +19,19 @@ static void draw (menu_t *menu, surface_t *d) {
     rdpq_detach_show();
 }
 
+static void load (menu_t *menu) {
+    menu->components.background = component_background_create(BACKGROUND_CACHE);
+}
+
 
 void view_startup_init (menu_t *menu) {
-    // Nothing to initialize (yet)
+    directory_create(CACHE_DIRECTORY);
 }
 
 void view_startup_display (menu_t *menu, surface_t *display) {
     process(menu);
+
     draw(menu, display);
+
+    load(menu);
 }

src/menu/views/system_info.c

@@ -1,6 +1,7 @@
 #include <time.h>
 #include <libdragon.h>
 
+#include "../components/components.h"
 #include "fragments/fragments.h"
 #include "views.h"
 
@@ -35,11 +36,12 @@ static void draw (menu_t *menu, surface_t *d) {
     const int text_x = layout->offset_x + layout->offset_text_x;
     int text_y = layout->offset_y + layout->offset_text_y;
 
-    const color_t bg_color = RGBA32(0x00, 0x00, 0x00, 0xFF);
     const color_t text_color = RGBA32(0xFF, 0xFF, 0xFF, 0xFF);
 
     rdpq_attach(d, NULL);
-    rdpq_clear(bg_color);
+
+    // Background
+    component_background_draw(menu->components.background);
 
     // Layout
     fragment_borders(d);