rotozoom!
This commit is contained in:
Albert Fabregat
parent
dd9f7ef627
commit
bb089ddf35
902
ediv/src/dlls/graphics/SDL_rotozoom.c
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902
ediv/src/dlls/graphics/SDL_rotozoom.c
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/*
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SDL_rotozoom.c
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Copyright (C) A. Schiffler, July 2001
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef WIN32
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#include <windows.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include "SDL_rotozoom.h"
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#define MAX(a,b) (((a) > (b)) ? (a) : (b))
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/*
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32bit Zoomer with optional anti-aliasing by bilinear interpolation.
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Zoomes 32bit RGBA/ABGR 'src' surface to 'dst' surface.
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*/
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int
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zoomSurfaceRGBA (SDL_Surface * src, SDL_Surface * dst, int smooth)
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{
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int x, y, sx, sy, *sax, *say, *csax, *csay, csx, csy, ex, ey, t1, t2, sstep;
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tColorRGBA *c00, *c01, *c10, *c11;
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tColorRGBA *sp, *csp, *dp;
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int sgap, dgap, orderRGBA;
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/* Variable setup */
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if (smooth)
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{
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/* For interpolation: assume source dimension is one pixel */
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/* smaller to avoid overflow on right and bottom edge. */
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sx = (int) (65536.0 * (float) (src->w - 1) / (float) dst->w);
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sy = (int) (65536.0 * (float) (src->h - 1) / (float) dst->h);
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}
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else
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{
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sx = (int) (65536.0 * (float) src->w / (float) dst->w);
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sy = (int) (65536.0 * (float) src->h / (float) dst->h);
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}
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/* Allocate memory for row increments */
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if ((sax = (int *) malloc ((dst->w + 1) * sizeof (Uint32))) == NULL)
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{
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return (-1);
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}
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if ((say = (int *) malloc ((dst->h + 1) * sizeof (Uint32))) == NULL)
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{
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free (sax);
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return (-1);
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}
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/* Precalculate row increments */
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csx = 0;
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csax = sax;
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for (x = 0; x <= dst->w; x++)
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{
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*csax = csx;
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csax++;
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csx &= 0xffff;
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csx += sx;
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}
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csy = 0;
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csay = say;
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for (y = 0; y <= dst->h; y++)
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{
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*csay = csy;
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csay++;
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csy &= 0xffff;
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csy += sy;
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}
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/* Pointer setup */
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sp = csp = (tColorRGBA *) src->pixels;
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dp = (tColorRGBA *) dst->pixels;
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sgap = src->pitch - src->w * 4;
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dgap = dst->pitch - dst->w * 4;
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orderRGBA = (src->format->Rmask == 0x000000ff);
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/* Switch between interpolating and non-interpolating code */
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if (smooth)
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{
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/* Interpolating Zoom */
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/* Scan destination */
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csay = say;
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for (y = 0; y < dst->h; y++)
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{
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/* Setup color source pointers */
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c00 = csp;
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c01 = csp;
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c01++;
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c10 = (tColorRGBA *) ((Uint8 *) csp + src->pitch);
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c11 = c10;
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c11++;
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csax = sax;
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for (x = 0; x < dst->w; x++)
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{
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/* ABGR ordering */
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/* Interpolate colors */
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ex = (*csax & 0xffff);
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ey = (*csay & 0xffff);
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t1 = ((((c01->r - c00->r) * ex) >> 16) + c00->r) & 0xff;
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t2 = ((((c11->r - c10->r) * ex) >> 16) + c10->r) & 0xff;
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dp->r = (((t2 - t1) * ey) >> 16) + t1;
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t1 = ((((c01->g - c00->g) * ex) >> 16) + c00->g) & 0xff;
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t2 = ((((c11->g - c10->g) * ex) >> 16) + c10->g) & 0xff;
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dp->g = (((t2 - t1) * ey) >> 16) + t1;
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t1 = ((((c01->b - c00->b) * ex) >> 16) + c00->b) & 0xff;
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t2 = ((((c11->b - c10->b) * ex) >> 16) + c10->b) & 0xff;
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dp->b = (((t2 - t1) * ey) >> 16) + t1;
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t1 = ((((c01->a - c00->a) * ex) >> 16) + c00->a) & 0xff;
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t2 = ((((c11->a - c10->a) * ex) >> 16) + c10->a) & 0xff;
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dp->a = (((t2 - t1) * ey) >> 16) + t1;
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/* Advance source pointers */
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csax++;
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sstep = (*csax >> 16);
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c00 += sstep;
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c01 += sstep;
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c10 += sstep;
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c11 += sstep;
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/* Advance destination pointer */
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dp++;
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}
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/* Advance source pointer */
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csay++;
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csp = (tColorRGBA *) ((Uint8 *) csp + (*csay >> 16) * src->pitch);
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/* Advance destination pointers */
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dp = (tColorRGBA *) ((Uint8 *) dp + dgap);
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}
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}
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else
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{
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/* Non-Interpolating Zoom */
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csay = say;
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for (y = 0; y < dst->h; y++)
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{
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sp = csp;
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csax = sax;
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for (x = 0; x < dst->w; x++)
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{
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/* Draw */
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*dp = *sp;
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/* Advance source pointers */
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csax++;
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sp += (*csax >> 16);
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/* Advance destination pointer */
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dp++;
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}
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/* Advance source pointer */
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csay++;
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csp = (tColorRGBA *) ((Uint8 *) csp + (*csay >> 16) * src->pitch);
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/* Advance destination pointers */
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dp = (tColorRGBA *) ((Uint8 *) dp + dgap);
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}
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}
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/* Remove temp arrays */
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free (sax);
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free (say);
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return (0);
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}
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/*
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8bit Zoomer without smoothing.
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Zoomes 8bit palette/Y 'src' surface to 'dst' surface.
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*/
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int
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zoomSurfaceY (SDL_Surface * src, SDL_Surface * dst)
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{
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Uint32 x, y, sx, sy, *sax, *say, *csax, *csay, csx, csy;
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Uint8 *sp, *dp, *csp;
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int dgap;
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/* Variable setup */
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sx = (Uint32) (65536.0 * (float) src->w / (float) dst->w);
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sy = (Uint32) (65536.0 * (float) src->h / (float) dst->h);
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/* Allocate memory for row increments */
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if ((sax = (Uint32 *) malloc (dst->w * sizeof (Uint32))) == NULL)
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{
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return (-1);
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}
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if ((say = (Uint32 *) malloc (dst->h * sizeof (Uint32))) == NULL)
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{
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if (sax != NULL)
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{
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free (sax);
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}
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return (-1);
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}
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/* Precalculate row increments */
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csx = 0;
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csax = sax;
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for (x = 0; x < dst->w; x++)
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{
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csx += sx;
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*csax = (csx >> 16);
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csx &= 0xffff;
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csax++;
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}
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csy = 0;
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csay = say;
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for (y = 0; y < dst->h; y++)
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{
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csy += sy;
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*csay = (csy >> 16);
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csy &= 0xffff;
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csay++;
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}
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csx = 0;
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csax = sax;
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for (x = 0; x < dst->w; x++)
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{
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csx += (*csax);
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csax++;
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}
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csy = 0;
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csay = say;
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for (y = 0; y < dst->h; y++)
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{
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csy += (*csay);
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csay++;
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}
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/* Pointer setup */
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sp = csp = (Uint8 *) src->pixels;
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dp = (Uint8 *) dst->pixels;
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dgap = dst->pitch - dst->w;
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/* Draw */
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csay = say;
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for (y = 0; y < dst->h; y++)
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{
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csax = sax;
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sp = csp;
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for (x = 0; x < dst->w; x++)
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{
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/* Draw */
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*dp = *sp;
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/* Advance source pointers */
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sp += (*csax);
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csax++;
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/* Advance destination pointer */
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dp++;
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}
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/* Advance source pointer (for row) */
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csp += ((*csay) * src->pitch);
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csay++;
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/* Advance destination pointers */
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dp += dgap;
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}
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/* Remove temp arrays */
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free (sax);
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free (say);
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return (0);
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}
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/*
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32bit Rotozoomer with optional anti-aliasing by bilinear interpolation.
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Rotates and zoomes 32bit RGBA/ABGR 'src' surface to 'dst' surface.
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*/
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void
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transformSurfaceRGBA (SDL_Surface * src, SDL_Surface * dst, int cx, int cy,
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int isin, int icos, int smooth)
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{
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int x, y, t1, t2, dx, dy, xd, yd, sdx, sdy, ax, ay, ex, ey, sw, sh;
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tColorRGBA c00, c01, c10, c11;
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tColorRGBA *pc, *sp;
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int gap, orderRGBA;
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xd = ((src->w - dst->w) << 15);
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yd = ((src->h - dst->h) << 15);
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ax = (cx << 16) - (icos * cx);
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ay = (cy << 16) - (isin * cx);
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sw = src->w - 1;
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sh = src->h - 1;
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pc = dst->pixels;
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gap = dst->pitch - dst->w * 4;
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orderRGBA = (src->format->Rmask == 0x000000ff);
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if (smooth)
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{
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for (y = 0; y < dst->h; y++)
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{
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dy = cy - y;
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sdx = (ax + (isin * dy)) + xd;
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sdy = (ay - (icos * dy)) + yd;
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for (x = 0; x < dst->w; x++)
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{
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dx = (sdx >> 16);
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dy = (sdy >> 16);
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if ((dx >= -1) && (dy >= -1) && (dx < src->w) && (dy < src->h))
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{
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if ((dx >= 0) && (dy >= 0) && (dx < sw) && (dy < sh))
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{
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sp =
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(tColorRGBA *) ((Uint8 *) src->pixels +
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src->pitch * dy);
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sp += dx;
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c00 = *sp;
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sp += 1;
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c01 = *sp;
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sp = (tColorRGBA *) ((Uint8 *) sp + src->pitch);
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sp -= 1;
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c10 = *sp;
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sp += 1;
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c11 = *sp;
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}
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else if ((dx == sw) && (dy == sh))
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{
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sp =
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(tColorRGBA *) ((Uint8 *) src->pixels +
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src->pitch * dy);
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sp += dx;
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c00 = *sp;
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c01 = *pc;
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c10 = *pc;
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c11 = *pc;
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}
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else if ((dx == -1) && (dy == -1))
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{
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sp = (tColorRGBA *) (src->pixels);
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c00 = *pc;
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c01 = *pc;
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c10 = *pc;
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c11 = *sp;
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}
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else if ((dx == -1) && (dy == sh))
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{
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sp = (tColorRGBA *) (src->pixels);
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sp =
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(tColorRGBA *) ((Uint8 *) src->pixels +
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src->pitch * dy);
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c00 = *pc;
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c01 = *sp;
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c10 = *pc;
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c11 = *pc;
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}
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else if ((dx == sw) && (dy == -1))
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{
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sp = (tColorRGBA *) (src->pixels);
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sp += dx;
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c00 = *pc;
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c01 = *pc;
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c10 = *sp;
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c11 = *pc;
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}
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else if (dx == -1)
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{
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sp =
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(tColorRGBA *) ((Uint8 *) src->pixels +
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src->pitch * dy);
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c00 = *pc;
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c01 = *sp;
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c10 = *pc;
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sp = (tColorRGBA *) ((Uint8 *) sp + src->pitch);
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c11 = *sp;
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}
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else if (dy == -1)
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{
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sp = (tColorRGBA *) (src->pixels);
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sp += dx;
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c00 = *pc;
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c01 = *pc;
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c10 = *sp;
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sp += 1;
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c11 = *sp;
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}
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else if (dx == sw)
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{
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sp =
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(tColorRGBA *) ((Uint8 *) src->pixels +
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src->pitch * dy);
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sp += dx;
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c00 = *sp;
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c01 = *pc;
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sp = (tColorRGBA *) ((Uint8 *) sp + src->pitch);
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c10 = *sp;
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c11 = *pc;
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}
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else if (dy == sh)
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{
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sp =
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(tColorRGBA *) ((Uint8 *) src->pixels +
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src->pitch * dy);
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sp += dx;
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c00 = *sp;
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sp += 1;
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c01 = *sp;
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c10 = *pc;
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c11 = *pc;
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}
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ex = (sdx & 0xffff);
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ey = (sdy & 0xffff);
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t1 = ((((c01.r - c00.r) * ex) >> 16) + c00.r) & 0xff;
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t2 = ((((c11.r - c10.r) * ex) >> 16) + c10.r) & 0xff;
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pc->r = (((t2 - t1) * ey) >> 16) + t1;
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t1 = ((((c01.g - c00.g) * ex) >> 16) + c00.g) & 0xff;
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t2 = ((((c11.g - c10.g) * ex) >> 16) + c10.g) & 0xff;
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pc->g = (((t2 - t1) * ey) >> 16) + t1;
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t1 = ((((c01.b - c00.b) * ex) >> 16) + c00.b) & 0xff;
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t2 = ((((c11.b - c10.b) * ex) >> 16) + c10.b) & 0xff;
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pc->b = (((t2 - t1) * ey) >> 16) + t1;
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t1 = ((((c01.a - c00.a) * ex) >> 16) + c00.a) & 0xff;
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t2 = ((((c11.a - c10.a) * ex) >> 16) + c10.a) & 0xff;
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pc->a = (((t2 - t1) * ey) >> 16) + t1;
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}
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sdx += icos;
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sdy += isin;
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pc++;
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}
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pc = (tColorRGBA *) ((Uint8 *) pc + gap);
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}
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}
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else
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{
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for (y = 0; y < dst->h; y++)
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{
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dy = cy - y;
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sdx = (ax + (isin * dy)) + xd;
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sdy = (ay - (icos * dy)) + yd;
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for (x = 0; x < dst->w; x++)
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{
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dx = (short) (sdx >> 16);
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dy = (short) (sdy >> 16);
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if ((dx >= 0) && (dy >= 0) && (dx < src->w) && (dy < src->h))
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{
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sp =
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(tColorRGBA *) ((Uint8 *) src->pixels + src->pitch * dy);
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sp += dx;
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*pc = *sp;
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}
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sdx += icos;
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sdy += isin;
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pc++;
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}
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pc = (tColorRGBA *) ((Uint8 *) pc + gap);
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}
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}
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}
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/*
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8bit Rotozoomer without smoothing
|
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|
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Rotates and zoomes 8bit palette/Y 'src' surface to 'dst' surface.
|
||||
|
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*/
|
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|
||||
void
|
||||
transformSurfaceY (SDL_Surface * src, SDL_Surface * dst, int cx, int cy,
|
||||
int isin, int icos)
|
||||
{
|
||||
int x, y, dx, dy, xd, yd, sdx, sdy, ax, ay, sw, sh;
|
||||
tColorY *pc, *sp;
|
||||
int gap;
|
||||
|
||||
/* Variable setup */
|
||||
xd = ((src->w - dst->w) << 15);
|
||||
yd = ((src->h - dst->h) << 15);
|
||||
ax = (cx << 16) - (icos * cx);
|
||||
ay = (cy << 16) - (isin * cx);
|
||||
sw = src->w - 1;
|
||||
sh = src->h - 1;
|
||||
pc = dst->pixels;
|
||||
gap = dst->pitch - dst->w;
|
||||
/* Clear surface to colorkey */
|
||||
memset (pc, (unsigned char) (src->format->colorkey & 0xff),
|
||||
dst->pitch * dst->h);
|
||||
/* Iterate through destination surface */
|
||||
for (y = 0; y < dst->h; y++)
|
||||
{
|
||||
dy = cy - y;
|
||||
sdx = (ax + (isin * dy)) + xd;
|
||||
sdy = (ay - (icos * dy)) + yd;
|
||||
for (x = 0; x < dst->w; x++)
|
||||
{
|
||||
dx = (short) (sdx >> 16);
|
||||
dy = (short) (sdy >> 16);
|
||||
if ((dx >= 0) && (dy >= 0) && (dx < src->w) && (dy < src->h))
|
||||
{
|
||||
sp = (tColorY *) (src->pixels);
|
||||
sp += (src->pitch * dy + dx);
|
||||
*pc = *sp;
|
||||
}
|
||||
sdx += icos;
|
||||
sdy += isin;
|
||||
pc++;
|
||||
}
|
||||
pc += gap;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
rotozoomSurface()
|
||||
|
||||
Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
|
||||
'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1
|
||||
then the destination 32bit surface is anti-aliased. If the surface is not 8bit
|
||||
or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
|
||||
|
||||
*/
|
||||
|
||||
/*XPUT/* Sanity check */
|
||||
/* Determine if source surface is 32bit or 8bit */
|
||||
/* New source surface is 32bit with a defined RGBA ordering */
|
||||
/* Sanity check zoom factor */
|
||||
/* Check if we have a rotozoom or just a zoom */
|
||||
/* Angle!=0: full rotozoom *
|
||||
//* ----------------------- */
|
||||
/* Calculate target factors from sin/cos and zoom
|
||||
*/
|
||||
/* Determine destination width and height by rotating a centered source box */
|
||||
/* Alloc space to completely contain the rotated surface */
|
||||
/* Target surface is 32bit with source RGBA/ABGR ordering */
|
||||
/* Lock source surface */
|
||||
/* Check which kind of surface we have */
|
||||
/* Call the 32bit transformation routine to do the rotation (using alpha) */
|
||||
|
||||
#define VALUE_LIMIT 0.001
|
||||
|
||||
SDL_Surface *
|
||||
rotozoomSurface (SDL_Surface * src, double angle, double zoom, int smooth)
|
||||
{
|
||||
SDL_Surface *rz_src;
|
||||
SDL_Surface *rz_dst;
|
||||
double zoominv;
|
||||
double radangle, sanglezoom, canglezoom, sanglezoominv, canglezoominv;
|
||||
int dstwidthhalf, dstwidth, dstheighthalf, dstheight;
|
||||
double x, y, cx, cy, sx, sy;
|
||||
int is32bit;
|
||||
int i, src_converted;
|
||||
|
||||
|
||||
if (src == NULL)
|
||||
return (NULL);
|
||||
|
||||
|
||||
is32bit = (src->format->BitsPerPixel == 32);
|
||||
if ((is32bit) || (src->format->BitsPerPixel == 8))
|
||||
{
|
||||
|
||||
rz_src = src;
|
||||
src_converted = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
|
||||
rz_src =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, src->w, src->h, 32, 0x000000ff,
|
||||
0x0000ff00, 0x00ff0000, 0xff000000);
|
||||
SDL_BlitSurface (src, NULL, rz_src, NULL);
|
||||
src_converted = 1;
|
||||
is32bit = 1;
|
||||
}
|
||||
|
||||
|
||||
if (zoom < VALUE_LIMIT)
|
||||
{
|
||||
zoom = VALUE_LIMIT;
|
||||
}
|
||||
zoominv = 65536.0 / zoom;
|
||||
|
||||
|
||||
if (fabs (angle) > VALUE_LIMIT)
|
||||
{
|
||||
|
||||
radangle = angle * (M_PI / 180.0);
|
||||
sanglezoom = sanglezoominv = sin (radangle);
|
||||
canglezoom = canglezoominv = cos (radangle);
|
||||
sanglezoom *= zoom;
|
||||
canglezoom *= zoom;
|
||||
sanglezoominv *= zoominv;
|
||||
canglezoominv *= zoominv;
|
||||
|
||||
x = rz_src->w / 2;
|
||||
y = rz_src->h / 2;
|
||||
cx = canglezoom * x;
|
||||
cy = canglezoom * y;
|
||||
sx = sanglezoom * x;
|
||||
sy = sanglezoom * y;
|
||||
dstwidthhalf = src->w;
|
||||
dstheighthalf = src->h;
|
||||
/*dstwidthhalf =MAX ((int)
|
||||
ceil (MAX
|
||||
(MAX
|
||||
(MAX (fabs (cx + sy), fabs (cx - sy)), fabs (-cx + sy)),
|
||||
fabs (-cx - sy))), 1);
|
||||
dstheighthalf = MAX ((int) ceil (MAX (MAX (MAX (fabs (sx + cy), fabs (sx - cy)), fabs (-sx + cy)),fabs (-sx - cy))), 1);
|
||||
*/
|
||||
dstwidth = 2 * dstwidthhalf;
|
||||
dstheight = 2 * dstheighthalf;
|
||||
|
||||
rz_dst = NULL;
|
||||
if (is32bit)
|
||||
{
|
||||
|
||||
rz_dst =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, dstwidth, dstheight, 32,
|
||||
rz_src->format->Rmask,
|
||||
rz_src->format->Gmask,
|
||||
rz_src->format->Bmask,
|
||||
rz_src->format->Amask);
|
||||
}
|
||||
else
|
||||
{
|
||||
|
||||
rz_dst =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, dstwidth, dstheight, 8, 0, 0,
|
||||
0, 0);
|
||||
}
|
||||
|
||||
|
||||
SDL_LockSurface (rz_src);
|
||||
|
||||
if (is32bit)
|
||||
{
|
||||
|
||||
transformSurfaceRGBA (rz_src, rz_dst, dstwidthhalf, dstheighthalf,
|
||||
(int) (sanglezoominv),
|
||||
(int) (canglezoominv), smooth);
|
||||
|
||||
SDL_SetAlpha (rz_dst, SDL_SRCALPHA, 255);
|
||||
}
|
||||
else
|
||||
{
|
||||
|
||||
for (i = 0; i < rz_src->format->palette->ncolors; i++)
|
||||
{
|
||||
rz_dst->format->palette->colors[i] =
|
||||
rz_src->format->palette->colors[i];
|
||||
}
|
||||
rz_dst->format->palette->ncolors = rz_src->format->palette->ncolors;
|
||||
|
||||
transformSurfaceY (rz_src, rz_dst, dstwidthhalf, dstheighthalf,
|
||||
(int) (sanglezoominv), (int) (canglezoominv));
|
||||
SDL_SetColorKey (rz_dst, SDL_SRCCOLORKEY | SDL_RLEACCEL,
|
||||
rz_src->format->colorkey);
|
||||
}
|
||||
|
||||
SDL_UnlockSurface (rz_src);
|
||||
|
||||
}
|
||||
else
|
||||
{
|
||||
|
||||
dstwidth = (int) ((double) rz_src->w * zoom);
|
||||
dstheight = (int) ((double) rz_src->h * zoom);
|
||||
if (dstwidth < 1)
|
||||
{
|
||||
dstwidth = 1;
|
||||
}
|
||||
if (dstheight < 1)
|
||||
{
|
||||
dstheight = 1;
|
||||
}
|
||||
|
||||
|
||||
rz_dst = NULL;
|
||||
if (is32bit)
|
||||
{
|
||||
|
||||
rz_dst =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, dstwidth, dstheight, 32,
|
||||
rz_src->format->Rmask,
|
||||
rz_src->format->Gmask,
|
||||
rz_src->format->Bmask,
|
||||
rz_src->format->Amask);
|
||||
}
|
||||
else
|
||||
{
|
||||
|
||||
rz_dst =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, dstwidth, dstheight, 8, 0, 0,
|
||||
0, 0);
|
||||
}
|
||||
|
||||
|
||||
SDL_LockSurface (rz_src);
|
||||
|
||||
if (is32bit)
|
||||
{
|
||||
|
||||
zoomSurfaceRGBA (rz_src, rz_dst, smooth);
|
||||
|
||||
SDL_SetAlpha (rz_dst, SDL_SRCALPHA, 255);
|
||||
}
|
||||
else
|
||||
{
|
||||
|
||||
for (i = 0; i < rz_src->format->palette->ncolors; i++)
|
||||
{
|
||||
rz_dst->format->palette->colors[i] =
|
||||
rz_src->format->palette->colors[i];
|
||||
}
|
||||
rz_dst->format->palette->ncolors = rz_src->format->palette->ncolors;
|
||||
|
||||
zoomSurfaceY (rz_src, rz_dst);
|
||||
SDL_SetColorKey (rz_dst, SDL_SRCCOLORKEY | SDL_RLEACCEL,
|
||||
rz_src->format->colorkey);
|
||||
}
|
||||
|
||||
SDL_UnlockSurface (rz_src);
|
||||
}
|
||||
|
||||
|
||||
if (src_converted)
|
||||
{
|
||||
SDL_FreeSurface (rz_src);
|
||||
}
|
||||
|
||||
|
||||
return (rz_dst);
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
zoomSurface()
|
||||
|
||||
Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
|
||||
'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1
|
||||
then the destination 32bit surface is anti-aliased. If the surface is not 8bit
|
||||
or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
|
||||
|
||||
*/
|
||||
|
||||
#define VALUE_LIMIT 0.001
|
||||
|
||||
SDL_Surface *
|
||||
zoomSurface (SDL_Surface * src, double zoomx, double zoomy, int smooth)
|
||||
{
|
||||
SDL_Surface *rz_src;
|
||||
SDL_Surface *rz_dst;
|
||||
int dstwidth, dstheight;
|
||||
int is32bit;
|
||||
int i, src_converted;
|
||||
|
||||
|
||||
if (src == NULL)
|
||||
return (NULL);
|
||||
|
||||
|
||||
|
||||
is32bit = (src->format->BitsPerPixel == 32);
|
||||
|
||||
if ((is32bit) || (src->format->BitsPerPixel == 8))
|
||||
{
|
||||
|
||||
rz_src = src;
|
||||
src_converted = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
|
||||
rz_src =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, src->w, src->h, 32, 0x000000ff,
|
||||
0x0000ff00, 0x00ff0000, 0xff000000);
|
||||
SDL_BlitSurface (src, NULL, rz_src, NULL);
|
||||
src_converted = 1;
|
||||
is32bit = 1;
|
||||
}
|
||||
|
||||
|
||||
if (zoomx < VALUE_LIMIT)
|
||||
{
|
||||
zoomx = VALUE_LIMIT;
|
||||
}
|
||||
if (zoomy < VALUE_LIMIT)
|
||||
{
|
||||
zoomy = VALUE_LIMIT;
|
||||
}
|
||||
|
||||
|
||||
dstwidth = (int) ((double) rz_src->w * zoomx);
|
||||
dstheight = (int) ((double) rz_src->h * zoomy);
|
||||
if (dstwidth < 1)
|
||||
{
|
||||
dstwidth = 1;
|
||||
}
|
||||
if (dstheight < 1)
|
||||
{
|
||||
dstheight = 1;
|
||||
}
|
||||
|
||||
|
||||
rz_dst = NULL;
|
||||
if (is32bit)
|
||||
{
|
||||
|
||||
rz_dst =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, dstwidth, dstheight, 32,
|
||||
rz_src->format->Rmask, rz_src->format->Gmask,
|
||||
rz_src->format->Bmask, rz_src->format->Amask);
|
||||
}
|
||||
else
|
||||
{
|
||||
|
||||
rz_dst =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, dstwidth, dstheight, 8, 0, 0, 0,
|
||||
0);
|
||||
}
|
||||
|
||||
|
||||
SDL_LockSurface (rz_src);
|
||||
|
||||
if (is32bit)
|
||||
{
|
||||
|
||||
zoomSurfaceRGBA (rz_src, rz_dst, smooth);
|
||||
SDL_SetAlpha (rz_dst, SDL_SRCALPHA, 255);
|
||||
}
|
||||
else
|
||||
{
|
||||
|
||||
for (i = 0; i < rz_src->format->palette->ncolors; i++)
|
||||
{
|
||||
rz_dst->format->palette->colors[i] =
|
||||
rz_src->format->palette->colors[i];
|
||||
}
|
||||
rz_dst->format->palette->ncolors = rz_src->format->palette->ncolors;
|
||||
|
||||
zoomSurfaceY (rz_src, rz_dst);
|
||||
SDL_SetColorKey (rz_dst, SDL_SRCCOLORKEY | SDL_RLEACCEL,
|
||||
rz_src->format->colorkey);
|
||||
}
|
||||
|
||||
SDL_UnlockSurface (rz_src);
|
||||
|
||||
|
||||
if (src_converted)
|
||||
{
|
||||
SDL_FreeSurface (rz_src);
|
||||
}
|
||||
|
||||
return (rz_dst);
|
||||
}
|
||||
|
||||
#ifdef WIN32
|
||||
/* For DLL building under VC6 */
|
||||
BOOL APIENTRY
|
||||
DllMain (HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
|
||||
{
|
||||
switch (ul_reason_for_call)
|
||||
{
|
||||
case DLL_PROCESS_ATTACH:
|
||||
case DLL_THREAD_ATTACH:
|
||||
case DLL_THREAD_DETACH:
|
||||
case DLL_PROCESS_DETACH:
|
||||
break;
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
#endif
|
||||
77
ediv/src/dlls/graphics/SDL_rotozoom.h
Normal file
77
ediv/src/dlls/graphics/SDL_rotozoom.h
Normal file
|
|
@ -0,0 +1,77 @@
|
|||
#ifndef _SDL_rotozoom_h
|
||||
#define _SDL_rotozoom_h
|
||||
|
||||
/* Set up for C function definitions, even when using C++ */
|
||||
#ifdef __cplusplus
|
||||
extern "C"
|
||||
{
|
||||
#endif
|
||||
|
||||
#include <math.h>
|
||||
#ifndef M_PI
|
||||
#define M_PI 3.141592654
|
||||
#endif
|
||||
#include "SDL.h"
|
||||
|
||||
|
||||
/* ---- Defines */
|
||||
|
||||
#define SMOOTHING_OFF 0
|
||||
#define SMOOTHING_ON 1
|
||||
|
||||
/* ---- Structures */
|
||||
|
||||
typedef struct tColorRGBA
|
||||
{
|
||||
Uint8 r;
|
||||
Uint8 g;
|
||||
Uint8 b;
|
||||
Uint8 a;
|
||||
}
|
||||
tColorRGBA;
|
||||
|
||||
typedef struct tColorY
|
||||
{
|
||||
Uint8 y;
|
||||
}
|
||||
tColorY;
|
||||
|
||||
|
||||
/* ---- Prototypes */
|
||||
|
||||
/*
|
||||
|
||||
rotozoomSurface()
|
||||
|
||||
Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
|
||||
'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1
|
||||
then the destination 32bit surface is anti-aliased. If the surface is not 8bit
|
||||
or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
|
||||
|
||||
*/
|
||||
|
||||
SDL_Surface *rotozoomSurface (SDL_Surface * src, double angle, double zoom,
|
||||
int smooth);
|
||||
|
||||
|
||||
/*
|
||||
|
||||
zoomSurface()
|
||||
|
||||
Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
|
||||
'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1
|
||||
then the destination 32bit surface is anti-aliased. If the surface is not 8bit
|
||||
or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
|
||||
|
||||
*/
|
||||
|
||||
SDL_Surface *zoomSurface (SDL_Surface * src, double zoomx, double zoomy,
|
||||
int smooth);
|
||||
|
||||
|
||||
/* Ends C function definitions when using C++ */
|
||||
#ifdef __cplusplus
|
||||
};
|
||||
#endif
|
||||
|
||||
#endif /* _SDL_rotozoom_h */
|
||||
444
ediv/src/dlls/graphics/testrotozoom.c
Normal file
444
ediv/src/dlls/graphics/testrotozoom.c
Normal file
|
|
@ -0,0 +1,444 @@
|
|||
/*
|
||||
|
||||
SDL_rotozoom - test program
|
||||
|
||||
Copyright (C) A. Schiffler, July 2001
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
*/
|
||||
|
||||
#ifdef WIN32
|
||||
#include <windows.h>
|
||||
#endif
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "SDL.h"
|
||||
#include "SDL_rotozoom.h"
|
||||
|
||||
void
|
||||
HandleEvent ()
|
||||
{
|
||||
SDL_Event event;
|
||||
|
||||
/* Check for events */
|
||||
while (SDL_PollEvent (&event))
|
||||
{
|
||||
switch (event.type)
|
||||
{
|
||||
case SDL_KEYDOWN:
|
||||
case SDL_QUIT:
|
||||
exit (0);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
ClearScreen (SDL_Surface * screen)
|
||||
{
|
||||
int i;
|
||||
/* Set the screen to black */
|
||||
if (SDL_LockSurface (screen) == 0)
|
||||
{
|
||||
Uint32 black;
|
||||
Uint8 *pixels;
|
||||
black = SDL_MapRGB (screen->format, 0, 0, 0);
|
||||
pixels = (Uint8 *) screen->pixels;
|
||||
for (i = 0; i < screen->h; ++i)
|
||||
{
|
||||
memset (pixels, black, screen->w * screen->format->BytesPerPixel);
|
||||
pixels += screen->pitch;
|
||||
}
|
||||
SDL_UnlockSurface (screen);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
RotatePicture (SDL_Surface * screen, SDL_Surface * picture, int rotate,
|
||||
int smooth)
|
||||
{
|
||||
SDL_Surface *rotozoom_picture;
|
||||
SDL_Rect dest;
|
||||
|
||||
int framecount, framemax, frameinc;
|
||||
float zoomf;
|
||||
|
||||
/* Rotate and display the picture */
|
||||
framemax = 4 * 360;
|
||||
frameinc = 1;
|
||||
for (framecount = 360; framecount < framemax; framecount += frameinc)
|
||||
{
|
||||
if ((framecount % 360) == 0)
|
||||
frameinc++;
|
||||
HandleEvent ();
|
||||
ClearScreen (screen);
|
||||
zoomf = (float) framecount / (float) framemax;
|
||||
zoomf = 1.5 * zoomf * zoomf;
|
||||
if ((rotozoom_picture =
|
||||
rotozoomSurface (picture, framecount * rotate, zoomf,
|
||||
smooth)) != NULL)
|
||||
{
|
||||
dest.x = (screen->w - rotozoom_picture->w) / 2;;
|
||||
dest.y = (screen->h - rotozoom_picture->h) / 2;
|
||||
dest.w = rotozoom_picture->w;
|
||||
dest.h = rotozoom_picture->h;
|
||||
if (SDL_BlitSurface (rotozoom_picture, NULL, screen, &dest) < 0)
|
||||
{
|
||||
fprintf (stderr, "Blit failed: %s\n", SDL_GetError ());
|
||||
break;
|
||||
}
|
||||
SDL_FreeSurface (rotozoom_picture);
|
||||
}
|
||||
|
||||
/* Display by flipping screens */
|
||||
SDL_UpdateRect (screen, 0, 0, 0, 0);
|
||||
}
|
||||
|
||||
if (rotate)
|
||||
{
|
||||
/* Final display with angle=0 */
|
||||
HandleEvent ();
|
||||
ClearScreen (screen);
|
||||
if ((rotozoom_picture =
|
||||
rotozoomSurface (picture, 0.01, zoomf, smooth)) != NULL)
|
||||
{
|
||||
dest.x = (screen->w - rotozoom_picture->w) / 2;;
|
||||
dest.y = (screen->h - rotozoom_picture->h) / 2;
|
||||
dest.w = rotozoom_picture->w;
|
||||
dest.h = rotozoom_picture->h;
|
||||
if (SDL_BlitSurface (rotozoom_picture, NULL, screen, &dest) < 0)
|
||||
{
|
||||
fprintf (stderr, "Blit failed: %s\n", SDL_GetError ());
|
||||
return;
|
||||
}
|
||||
SDL_FreeSurface (rotozoom_picture);
|
||||
}
|
||||
|
||||
/* Display by flipping screens */
|
||||
SDL_UpdateRect (screen, 0, 0, 0, 0);
|
||||
}
|
||||
|
||||
/* Pause for a sec */
|
||||
SDL_Delay (1000);
|
||||
}
|
||||
|
||||
void
|
||||
ZoomPicture (SDL_Surface * screen, SDL_Surface * picture, int smooth)
|
||||
{
|
||||
SDL_Surface *rotozoom_picture;
|
||||
SDL_Rect dest;
|
||||
int framecount, framemax, frameinc;
|
||||
float zoomxf, zoomyf;
|
||||
|
||||
/* Zoom and display the picture */
|
||||
framemax = 4 * 360;
|
||||
frameinc = 1;
|
||||
for (framecount = 360; framecount < framemax; framecount += frameinc)
|
||||
{
|
||||
if ((framecount % 360) == 0)
|
||||
frameinc++;
|
||||
HandleEvent ();
|
||||
ClearScreen (screen);
|
||||
zoomxf = (float) framecount / (float) framemax;
|
||||
zoomxf = 1.5 * zoomxf * zoomxf;
|
||||
zoomyf = 0.5 + fabs (1.0 * sin ((double) framecount / 80.0));
|
||||
|
||||
if ((rotozoom_picture =
|
||||
zoomSurface (picture, zoomxf, zoomyf, smooth)) != NULL)
|
||||
{
|
||||
dest.x = (screen->w - rotozoom_picture->w) / 2;;
|
||||
dest.y = (screen->h - rotozoom_picture->h) / 2;
|
||||
dest.w = rotozoom_picture->w;
|
||||
dest.h = rotozoom_picture->h;
|
||||
if (SDL_BlitSurface (rotozoom_picture, NULL, screen, &dest) < 0)
|
||||
{
|
||||
fprintf (stderr, "Blit failed: %s\n", SDL_GetError ());
|
||||
break;
|
||||
}
|
||||
SDL_FreeSurface (rotozoom_picture);
|
||||
}
|
||||
|
||||
/* Display by flipping screens */
|
||||
SDL_UpdateRect (screen, 0, 0, 0, 0);
|
||||
}
|
||||
|
||||
/* Pause for a sec */
|
||||
SDL_Delay (1000);
|
||||
}
|
||||
|
||||
void
|
||||
Draw (SDL_Surface * screen)
|
||||
{
|
||||
SDL_Surface *picture, *picture_again;
|
||||
char *bmpfile;
|
||||
|
||||
/* --------- 8 bit test -------- */
|
||||
|
||||
/* Message */
|
||||
fprintf (stderr, "Loading 8bit image\n");
|
||||
|
||||
/* Load the image into a surface */
|
||||
/*
|
||||
bmpfile = "sample8.bmp";
|
||||
fprintf (stderr, "Loading picture: %s\n", bmpfile);
|
||||
picture = SDL_LoadBMP (bmpfile);
|
||||
if (picture == NULL)
|
||||
{
|
||||
fprintf (stderr, "Couldn't load %s: %s\n", bmpfile, SDL_GetError ());
|
||||
return;
|
||||
}
|
||||
|
||||
fprintf (stderr, "rotozoom: Rotating and zooming\n");
|
||||
RotatePicture (screen, picture, 1, SMOOTHING_OFF);
|
||||
|
||||
fprintf (stderr, "rotozoom: Just zooming (angle=0)\n");
|
||||
RotatePicture (screen, picture, 0, SMOOTHING_OFF);
|
||||
|
||||
fprintf (stderr, "zoom: Just zooming\n");
|
||||
ZoomPicture (screen, picture, SMOOTHING_OFF);
|
||||
|
||||
|
||||
fprintf (stderr,
|
||||
"rotozoom: Rotating and zooming, interpolation on but unused\n");
|
||||
RotatePicture (screen, picture, 1, SMOOTHING_ON);
|
||||
|
||||
fprintf (stderr,
|
||||
"rotozoom: Just zooming (angle=0), interpolation on but unused\n");
|
||||
RotatePicture (screen, picture, 0, SMOOTHING_ON);
|
||||
|
||||
fprintf (stderr, "zoom: Just zooming, interpolation on but unused\n");
|
||||
ZoomPicture (screen, picture, SMOOTHING_ON);
|
||||
|
||||
|
||||
SDL_FreeSurface (picture);
|
||||
*/
|
||||
/* -------- 24 bit test --------- */
|
||||
|
||||
/* Message */
|
||||
fprintf (stderr, "Loading 24bit image\n");
|
||||
/* Load the image into a surface */
|
||||
bmpfile = "sample24.bmp";
|
||||
fprintf (stderr, "Loading picture: %s\n", bmpfile);
|
||||
picture = SDL_LoadBMP (bmpfile);
|
||||
if (picture == NULL)
|
||||
{
|
||||
fprintf (stderr, "Couldn't load %s: %s\n", bmpfile, SDL_GetError ());
|
||||
return;
|
||||
}
|
||||
|
||||
RotatePicture (screen, picture, 1, SMOOTHING_OFF);
|
||||
|
||||
|
||||
/*
|
||||
fprintf (stderr, "rotozoom: Rotating and zooming, no interpolation\n");
|
||||
RotatePicture (screen, picture, 1, SMOOTHING_OFF);
|
||||
|
||||
fprintf (stderr, "rotozoom: Just zooming (angle=0), no interpolation\n");
|
||||
RotatePicture (screen, picture, 0, SMOOTHING_OFF);
|
||||
|
||||
fprintf (stderr, "zoom: Just zooming, no interpolation\n");
|
||||
ZoomPicture (screen, picture, SMOOTHING_OFF);
|
||||
|
||||
|
||||
fprintf (stderr, "rotozoom: Rotating and zooming, with interpolation\n");
|
||||
RotatePicture (screen, picture, 1, SMOOTHING_ON);
|
||||
|
||||
fprintf (stderr, "rotozoom: Just zooming (angle=0), with interpolation\n");
|
||||
RotatePicture (screen, picture, 0, SMOOTHING_ON);
|
||||
|
||||
fprintf (stderr, "zoom: Just zooming, with interpolation\n");
|
||||
ZoomPicture (screen, picture, SMOOTHING_ON);
|
||||
|
||||
|
||||
|
||||
fprintf (stderr, "Converting 24bit image into 32bit RGBA surface ...\n");
|
||||
picture_again =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, picture->w, picture->h, 32,
|
||||
0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
|
||||
SDL_BlitSurface (picture, NULL, picture_again, NULL);
|
||||
|
||||
|
||||
fprintf (stderr, "Rotating and zooming, with interpolation\n");
|
||||
RotatePicture (screen, picture_again, 1, SMOOTHING_ON);
|
||||
|
||||
|
||||
fprintf (stderr, "Just zooming (angle=0), with interpolation\n");
|
||||
RotatePicture (screen, picture_again, 0, SMOOTHING_ON);
|
||||
|
||||
SDL_FreeSurface (picture_again);
|
||||
|
||||
|
||||
|
||||
fprintf (stderr, "Converting 24bit image into 32bit ABGR surface ...\n");
|
||||
picture_again =
|
||||
SDL_CreateRGBSurface (SDL_SWSURFACE, picture->w, picture->h, 32,
|
||||
0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
|
||||
SDL_BlitSurface (picture, NULL, picture_again, NULL);
|
||||
|
||||
|
||||
fprintf (stderr, "Rotating and zooming, with interpolation\n");
|
||||
RotatePicture (screen, picture_again, 1, SMOOTHING_ON);
|
||||
|
||||
|
||||
fprintf (stderr, "Just zooming (angle=0), with interpolation\n");
|
||||
RotatePicture (screen, picture_again, 0, SMOOTHING_ON);
|
||||
|
||||
SDL_FreeSurface (picture_again);
|
||||
|
||||
/* Free the picture */
|
||||
|
||||
//SDL_FreeSurface (picture);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef WIN32
|
||||
extern char **__argv;
|
||||
extern int __argc;
|
||||
int APIENTRY
|
||||
WinMain (HINSTANCE hInstance,
|
||||
HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
|
||||
#else // non WIN32
|
||||
int
|
||||
main (int argc, char *argv[])
|
||||
#endif
|
||||
{
|
||||
SDL_Surface *screen;
|
||||
int w, h;
|
||||
int desired_bpp;
|
||||
Uint32 video_flags;
|
||||
#ifdef WIN32
|
||||
int argc;
|
||||
char **argv;
|
||||
|
||||
argv = __argv;
|
||||
argc = __argc;
|
||||
#endif
|
||||
/* Title */
|
||||
fprintf (stderr, "SDL_rotozoom test\n");
|
||||
|
||||
/* Set default options and check command-line */
|
||||
w = 640;
|
||||
h = 480;
|
||||
desired_bpp = 0;
|
||||
video_flags = 0;
|
||||
while (argc > 1)
|
||||
{
|
||||
if (strcmp (argv[1], "-width") == 0)
|
||||
{
|
||||
if (argv[2] && ((w = atoi (argv[2])) > 0))
|
||||
{
|
||||
argv += 2;
|
||||
argc -= 2;
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf (stderr, "The -width option requires an argument\n");
|
||||
exit (1);
|
||||
}
|
||||
}
|
||||
else if (strcmp (argv[1], "-height") == 0)
|
||||
{
|
||||
if (argv[2] && ((h = atoi (argv[2])) > 0))
|
||||
{
|
||||
argv += 2;
|
||||
argc -= 2;
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf (stderr, "The -height option requires an argument\n");
|
||||
exit (1);
|
||||
}
|
||||
}
|
||||
else if (strcmp (argv[1], "-bpp") == 0)
|
||||
{
|
||||
if (argv[2])
|
||||
{
|
||||
desired_bpp = atoi (argv[2]);
|
||||
argv += 2;
|
||||
argc -= 2;
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf (stderr, "The -bpp option requires an argument\n");
|
||||
exit (1);
|
||||
}
|
||||
}
|
||||
else if (strcmp (argv[1], "-warp") == 0)
|
||||
{
|
||||
video_flags |= SDL_HWPALETTE;
|
||||
argv += 1;
|
||||
argc -= 1;
|
||||
}
|
||||
else if (strcmp (argv[1], "-hw") == 0)
|
||||
{
|
||||
video_flags |= SDL_HWSURFACE;
|
||||
argv += 1;
|
||||
argc -= 1;
|
||||
}
|
||||
else if (strcmp (argv[1], "-fullscreen") == 0)
|
||||
{
|
||||
video_flags |= SDL_FULLSCREEN;
|
||||
argv += 1;
|
||||
argc -= 1;
|
||||
}
|
||||
else
|
||||
break;
|
||||
}
|
||||
|
||||
/* Force double buffering */
|
||||
video_flags |= SDL_DOUBLEBUF;
|
||||
|
||||
/* Initialize SDL */
|
||||
if (SDL_Init (SDL_INIT_VIDEO) < 0)
|
||||
{
|
||||
fprintf (stderr, "Couldn't initialize SDL: %s\n", SDL_GetError ());
|
||||
exit (1);
|
||||
}
|
||||
atexit (SDL_Quit); /* Clean up on exit */
|
||||
|
||||
/* Initialize the display */
|
||||
screen = SDL_SetVideoMode (w, h, desired_bpp, video_flags);
|
||||
if (screen == NULL)
|
||||
{
|
||||
fprintf (stderr, "Couldn't set %dx%dx%d video mode: %s\n",
|
||||
w, h, desired_bpp, SDL_GetError ());
|
||||
exit (1);
|
||||
}
|
||||
|
||||
/* Show some info */
|
||||
printf ("Set %dx%dx%d mode\n",
|
||||
screen->w, screen->h, screen->format->BitsPerPixel);
|
||||
printf ("Video surface located in %s memory.\n",
|
||||
(screen->flags & SDL_HWSURFACE) ? "video" : "system");
|
||||
|
||||
/* Check for double buffering */
|
||||
if (screen->flags & SDL_DOUBLEBUF)
|
||||
{
|
||||
printf ("Double-buffering enabled - good!\n");
|
||||
}
|
||||
|
||||
/* Set the window manager title bar */
|
||||
SDL_WM_SetCaption ("SDL_rotozoom test", "rotozoom");
|
||||
|
||||
/* Do all the drawing work */
|
||||
Draw (screen);
|
||||
|
||||
return (0);
|
||||
}
|
||||
Loading…
Reference in a new issue