7c64631792
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8705 a1c6a512-1295-4272-9138-f99709370657
83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 Dan Everton
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "lcd-sdl.h"
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#include "uisdl.h"
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int display_zoom = 1;
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void sdl_update_rect(SDL_Surface *surface, int x_start, int y_start, int width,
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int height, int max_x, int max_y, int ui_x, int ui_y,
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Uint32 (*getpixel)(int, int))
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{
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int x, y;
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int xmax, ymax;
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SDL_Rect dest;
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ymax = y_start + height;
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xmax = x_start + width;
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if(xmax > max_x)
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xmax = max_x;
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if(ymax >= max_y)
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ymax = max_y;
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SDL_LockSurface(surface);
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dest.w = display_zoom;
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dest.h = display_zoom;
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for (x = x_start; x < xmax; x++) {
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dest.x = x * display_zoom;
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for (y = y_start; y < ymax; y++) {
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dest.y = y * display_zoom;
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SDL_FillRect(surface, &dest, getpixel(x, y));
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}
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}
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SDL_UnlockSurface(surface);
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SDL_Rect src = {x_start * display_zoom, y_start * display_zoom, xmax * display_zoom, ymax * display_zoom};
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dest.x = (ui_x + x_start) * display_zoom;
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dest.y = (ui_y + y_start) * display_zoom;;
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dest.w = xmax * display_zoom;
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dest.h = ymax * display_zoom;
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SDL_BlitSurface(surface, &src, gui_surface, &dest);
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SDL_UpdateRect(gui_surface, dest.x, dest.y, dest.w, dest.h);
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SDL_Flip(gui_surface);
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}
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/* set a range of bitmap indices to a gradient from startcolour to endcolour */
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void sdl_set_gradient(SDL_Surface *surface, SDL_Color *start, SDL_Color *end, int steps)
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{
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int i;
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SDL_Color palette[steps];
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for (i = 0; i < steps; i++) {
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palette[i].r = start->r + (end->r - start->r) * i / (steps - 1);
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palette[i].g = start->g + (end->g - start->g) * i / (steps - 1);
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palette[i].b = start->b + (end->b - start->b) * i / (steps - 1);
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}
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SDL_SetPalette(surface, SDL_LOGPAL|SDL_PHYSPAL, palette, 0, steps);
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}
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