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-rw-r--r--firmware/target/hosted/sdl/lcd-sdl.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/firmware/target/hosted/sdl/lcd-sdl.c b/firmware/target/hosted/sdl/lcd-sdl.c
new file mode 100644
index 0000000000..15e4ba95c3
--- /dev/null
+++ b/firmware/target/hosted/sdl/lcd-sdl.c
@@ -0,0 +1,113 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2006 Dan Everton
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <SDL.h>
+#include "lcd-sdl.h"
+#include "sim-ui-defines.h"
+#include "system.h" /* for MIN() and MAX() */
+
+int display_zoom = 1;
+
+void sdl_update_rect(SDL_Surface *surface, int x_start, int y_start, int width,
+ int height, int max_x, int max_y,
+ unsigned long (*getpixel)(int, int))
+{
+ int x, y;
+ int xmax, ymax;
+ SDL_Rect dest;
+
+ ymax = y_start + height;
+ xmax = x_start + width;
+
+ if(xmax > max_x)
+ xmax = max_x;
+ if(ymax >= max_y)
+ ymax = max_y;
+
+ SDL_LockSurface(surface);
+
+ dest.w = display_zoom;
+ dest.h = display_zoom;
+
+ for (x = x_start; x < xmax; x++) {
+ dest.x = x * display_zoom;
+
+#ifdef HAVE_LCD_SPLIT
+ for (y = y_start; y < MIN(ymax, LCD_SPLIT_POS); y++) {
+ dest.y = y * display_zoom;
+
+ SDL_FillRect(surface, &dest, (Uint32)(getpixel(x, y) | 0x80));
+ }
+ for (y = MAX(y_start, LCD_SPLIT_POS); y < ymax; y++) {
+ dest.y = (y + LCD_SPLIT_LINES) * display_zoom ;
+
+ SDL_FillRect(surface, &dest, (Uint32)getpixel(x, y));
+ }
+#else
+ for (y = y_start; y < ymax; y++) {
+ dest.y = y * display_zoom;
+
+ SDL_FillRect(surface, &dest, (Uint32)getpixel(x, y));
+ }
+#endif
+ }
+
+ SDL_UnlockSurface(surface);
+}
+
+void sdl_gui_update(SDL_Surface *surface, int x_start, int y_start, int width,
+ int height, int max_x, int max_y, int ui_x, int ui_y)
+{
+ if (x_start + width > max_x)
+ width = max_x - x_start;
+ if (y_start + height > max_y)
+ height = max_y - y_start;
+
+ SDL_Rect src = {x_start * display_zoom, y_start * display_zoom,
+ width * display_zoom, height * display_zoom};
+ SDL_Rect dest= {(ui_x + x_start) * display_zoom,
+ (ui_y + y_start) * display_zoom,
+ width * display_zoom, height * display_zoom};
+
+ if (surface->flags & SDL_SRCALPHA) /* alpha needs a black background */
+ SDL_FillRect(gui_surface, &dest, 0);
+
+ SDL_BlitSurface(surface, &src, gui_surface, &dest);
+
+ SDL_Flip(gui_surface);
+}
+
+/* set a range of bitmap indices to a gradient from startcolour to endcolour */
+void sdl_set_gradient(SDL_Surface *surface, SDL_Color *start, SDL_Color *end,
+ int first, int steps)
+{
+ int i;
+ SDL_Color palette[steps];
+
+ for (i = 0; i < steps; i++) {
+ palette[i].r = start->r + (end->r - start->r) * i / (steps - 1);
+ palette[i].g = start->g + (end->g - start->g) * i / (steps - 1);
+ palette[i].b = start->b + (end->b - start->b) * i / (steps - 1);
+ }
+
+ SDL_SetPalette(surface, SDL_LOGPAL|SDL_PHYSPAL, palette, first, steps);
+}
+