diff options
Diffstat (limited to 'ui/sdl_zoom_template.h')
| -rw-r--r-- | ui/sdl_zoom_template.h | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/ui/sdl_zoom_template.h b/ui/sdl_zoom_template.h deleted file mode 100644 index 6a424adfb4..0000000000 --- a/ui/sdl_zoom_template.h +++ /dev/null @@ -1,219 +0,0 @@ -/* - * SDL_zoom_template - surface scaling - * - * Copyright (c) 2009 Citrix Systems, Inc. - * - * Derived from: SDL_rotozoom, LGPL (c) A. Schiffler from the SDL_gfx library. - * Modifications by Stefano Stabellini. - * - * This work is licensed under the terms of the GNU GPL version 2. - * See the COPYING file in the top-level directory. - * - */ - -#if BPP == 16 -#define SDL_TYPE Uint16 -#elif BPP == 32 -#define SDL_TYPE Uint32 -#else -#error unsupport depth -#endif - -/* - * Simple helper functions to make the code looks nicer - * - * Assume spf = source SDL_PixelFormat - * dpf = dest SDL_PixelFormat - * - */ -#define getRed(color) (((color) & spf->Rmask) >> spf->Rshift) -#define getGreen(color) (((color) & spf->Gmask) >> spf->Gshift) -#define getBlue(color) (((color) & spf->Bmask) >> spf->Bshift) -#define getAlpha(color) (((color) & spf->Amask) >> spf->Ashift) - -#define setRed(r, pcolor) do { \ - *pcolor = ((*pcolor) & (~(dpf->Rmask))) + \ - (((r) & (dpf->Rmask >> dpf->Rshift)) << dpf->Rshift); \ -} while (0) - -#define setGreen(g, pcolor) do { \ - *pcolor = ((*pcolor) & (~(dpf->Gmask))) + \ - (((g) & (dpf->Gmask >> dpf->Gshift)) << dpf->Gshift); \ -} while (0) - -#define setBlue(b, pcolor) do { \ - *pcolor = ((*pcolor) & (~(dpf->Bmask))) + \ - (((b) & (dpf->Bmask >> dpf->Bshift)) << dpf->Bshift); \ -} while (0) - -#define setAlpha(a, pcolor) do { \ - *pcolor = ((*pcolor) & (~(dpf->Amask))) + \ - (((a) & (dpf->Amask >> dpf->Ashift)) << dpf->Ashift); \ -} while (0) - -static void glue(sdl_zoom_rgb, BPP)(SDL_Surface *src, SDL_Surface *dst, int smooth, - SDL_Rect *dst_rect) -{ - int x, y, sx, sy, *sax, *say, *csax, *csay, csx, csy, ex, ey, t1, t2, sstep, sstep_jump; - SDL_TYPE *c00, *c01, *c10, *c11, *sp, *csp, *dp; - int d_gap; - SDL_PixelFormat *spf = src->format; - SDL_PixelFormat *dpf = dst->format; - - if (smooth) { - /* For interpolation: assume source dimension is one pixel. - * Smaller here to avoid overflow on right and bottom edge. - */ - sx = (int) (65536.0 * (float) (src->w - 1) / (float) dst->w); - sy = (int) (65536.0 * (float) (src->h - 1) / (float) dst->h); - } else { - sx = (int) (65536.0 * (float) src->w / (float) dst->w); - sy = (int) (65536.0 * (float) src->h / (float) dst->h); - } - - sax = g_new(int, dst->w + 1); - say = g_new(int, dst->h + 1); - - sp = csp = (SDL_TYPE *) src->pixels; - dp = (SDL_TYPE *) (dst->pixels + dst_rect->y * dst->pitch + - dst_rect->x * dst->format->BytesPerPixel); - - csx = 0; - csax = sax; - for (x = 0; x <= dst->w; x++) { - *csax = csx; - csax++; - csx &= 0xffff; - csx += sx; - } - csy = 0; - csay = say; - for (y = 0; y <= dst->h; y++) { - *csay = csy; - csay++; - csy &= 0xffff; - csy += sy; - } - - d_gap = dst->pitch - dst_rect->w * dst->format->BytesPerPixel; - - if (smooth) { - csay = say; - for (y = 0; y < dst_rect->y; y++) { - csay++; - sstep = (*csay >> 16) * src->pitch; - csp = (SDL_TYPE *) ((Uint8 *) csp + sstep); - } - - /* Calculate sstep_jump */ - csax = sax; - sstep_jump = 0; - for (x = 0; x < dst_rect->x; x++) { - csax++; - sstep = (*csax >> 16); - sstep_jump += sstep; - } - - for (y = 0; y < dst_rect->h ; y++) { - /* Setup colour source pointers */ - c00 = csp + sstep_jump; - c01 = c00 + 1; - c10 = (SDL_TYPE *) ((Uint8 *) csp + src->pitch) + sstep_jump; - c11 = c10 + 1; - csax = sax + dst_rect->x; - - for (x = 0; x < dst_rect->w; x++) { - - /* Interpolate colours */ - ex = (*csax & 0xffff); - ey = (*csay & 0xffff); - t1 = ((((getRed(*c01) - getRed(*c00)) * ex) >> 16) + - getRed(*c00)) & (dpf->Rmask >> dpf->Rshift); - t2 = ((((getRed(*c11) - getRed(*c10)) * ex) >> 16) + - getRed(*c10)) & (dpf->Rmask >> dpf->Rshift); - setRed((((t2 - t1) * ey) >> 16) + t1, dp); - t1 = ((((getGreen(*c01) - getGreen(*c00)) * ex) >> 16) + - getGreen(*c00)) & (dpf->Gmask >> dpf->Gshift); - t2 = ((((getGreen(*c11) - getGreen(*c10)) * ex) >> 16) + - getGreen(*c10)) & (dpf->Gmask >> dpf->Gshift); - setGreen((((t2 - t1) * ey) >> 16) + t1, dp); - t1 = ((((getBlue(*c01) - getBlue(*c00)) * ex) >> 16) + - getBlue(*c00)) & (dpf->Bmask >> dpf->Bshift); - t2 = ((((getBlue(*c11) - getBlue(*c10)) * ex) >> 16) + - getBlue(*c10)) & (dpf->Bmask >> dpf->Bshift); - setBlue((((t2 - t1) * ey) >> 16) + t1, dp); - t1 = ((((getAlpha(*c01) - getAlpha(*c00)) * ex) >> 16) + - getAlpha(*c00)) & (dpf->Amask >> dpf->Ashift); - t2 = ((((getAlpha(*c11) - getAlpha(*c10)) * ex) >> 16) + - getAlpha(*c10)) & (dpf->Amask >> dpf->Ashift); - setAlpha((((t2 - t1) * ey) >> 16) + t1, dp); - - /* Advance source pointers */ - csax++; - sstep = (*csax >> 16); - c00 += sstep; - c01 += sstep; - c10 += sstep; - c11 += sstep; - /* Advance destination pointer */ - dp++; - } - /* Advance source pointer */ - csay++; - csp = (SDL_TYPE *) ((Uint8 *) csp + (*csay >> 16) * src->pitch); - /* Advance destination pointers */ - dp = (SDL_TYPE *) ((Uint8 *) dp + d_gap); - } - - - } else { - csay = say; - - for (y = 0; y < dst_rect->y; y++) { - csay++; - sstep = (*csay >> 16) * src->pitch; - csp = (SDL_TYPE *) ((Uint8 *) csp + sstep); - } - - /* Calculate sstep_jump */ - csax = sax; - sstep_jump = 0; - for (x = 0; x < dst_rect->x; x++) { - csax++; - sstep = (*csax >> 16); - sstep_jump += sstep; - } - - for (y = 0 ; y < dst_rect->h ; y++) { - sp = csp + sstep_jump; - csax = sax + dst_rect->x; - - for (x = 0; x < dst_rect->w; x++) { - - /* Draw */ - *dp = *sp; - - /* Advance source pointers */ - csax++; - sstep = (*csax >> 16); - sp += sstep; - - /* Advance destination pointer */ - dp++; - } - /* Advance source pointers */ - csay++; - sstep = (*csay >> 16) * src->pitch; - csp = (SDL_TYPE *) ((Uint8 *) csp + sstep); - - /* Advance destination pointer */ - dp = (SDL_TYPE *) ((Uint8 *) dp + d_gap); - } - } - - g_free(sax); - g_free(say); -} - -#undef SDL_TYPE - |