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scaling routine speeded up a little bit by using less switch case and using inline

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stpohle 23 years ago
parent 5bdad8852c
commit d5c9290cd3
2 changed files with 157 additions and 25 deletions
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12
src/gfx.h
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@ -1,4 +1,4 @@
/* $Id: gfx.h,v 1.15 2003/07/22 23:15:31 stpohle Exp $ */
/* $Id: gfx.h,v 1.16 2003/07/24 12:41:27 stpohle Exp $ */
#ifndef _GFX_H_
#define _GFX_H_
@ -82,8 +82,14 @@ extern void gfx_free_players ();
// gfxpixelimage.c
extern void getRGBpixel (SDL_Surface *surface, int x, int y, int *R, int *G, int *B);
extern Uint32 getpixel(SDL_Surface *surface, int x, int y);
extern void putpixel(SDL_Surface *surface, int x, int y, Uint32 pixel);
inline Uint32 getpixel(SDL_Surface *surface, int x, int y);
inline void putpixel(SDL_Surface *surface, int x, int y, Uint32 pixel);
inline Uint32 getpixel16(SDL_Surface *surface, int x, int y);
inline void putpixel16(SDL_Surface *surface, int x, int y, Uint32 pixel);
inline Uint32 getpixel24(SDL_Surface *surface, int x, int y);
inline void putpixel24(SDL_Surface *surface, int x, int y, Uint32 pixel);
inline Uint32 getpixel32(SDL_Surface *surface, int x, int y);
inline void putpixel32(SDL_Surface *surface, int x, int y, Uint32 pixel);
extern void scale (short int *dpattern, short int x, short int y);
extern SDL_Surface *scale_image (SDL_Surface * orginal, int newx, int newy);
extern void shade_pixel(SDL_Surface *s, int x, int y, int c);

142
src/gfxpixelimage.c
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@ -1,4 +1,4 @@
/* $Id: gfxpixelimage.c,v 1.1 2003/07/22 18:29:08 stpohle Exp $ */
/* $Id: gfxpixelimage.c,v 1.2 2003/07/24 12:41:27 stpohle Exp $ */
/* gfx pixel manipulation and image manipulation */
#include "bomberclone.h"
@ -27,7 +27,7 @@ getRGBpixel (SDL_Surface * surface, int x, int y, int *R, int *G, int *B)
*B = b;
};
/* getpixel for every BPP version */
Uint32
getpixel (SDL_Surface * surface, int x, int y)
{
@ -54,6 +54,38 @@ getpixel (SDL_Surface * surface, int x, int y)
};
inline Uint32
getpixel32 (SDL_Surface * surface, int x, int y)
{
/* Here p is the address to the pixel we want to retrieve */
Uint8 *p = (Uint8 *) surface->pixels + y * surface->pitch + x * surface->format->BytesPerPixel;
return *(Uint32 *) p;
};
inline Uint32
getpixel24 (SDL_Surface * surface, int x, int y)
{
/* Here p is the address to the pixel we want to retrieve */
Uint8 *p = (Uint8 *) surface->pixels + y * surface->pitch + x * surface->format->BytesPerPixel;;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
return p[0] << 16 | p[1] << 8 | p[2];
#else
return p[0] | p[1] << 8 | p[2] << 16;
#endif
};
inline Uint32
getpixel16 (SDL_Surface * surface, int x, int y)
{
/* Here p is the address to the pixel we want to retrieve */
Uint8 *p = (Uint8 *) surface->pixels + y * surface->pitch + x * surface->format->BytesPerPixel;
return *(Uint16 *) p;
};
/* putpixel seperated for every BPP version */
void
putpixel (SDL_Surface * surface, int x, int y, Uint32 pixel)
{
@ -87,6 +119,41 @@ putpixel (SDL_Surface * surface, int x, int y, Uint32 pixel)
};
inline void
putpixel32 (SDL_Surface * surface, int x, int y, Uint32 pixel)
{
/* Here p is the address to the pixel we want to set */
Uint8 *p = (Uint8 *) surface->pixels + y * surface->pitch + x * surface->format->BytesPerPixel;
*(Uint32 *) p = pixel;
};
inline void
putpixel24 (SDL_Surface * surface, int x, int y, Uint32 pixel)
{
/* Here p is the address to the pixel we want to set */
Uint8 *p = (Uint8 *) surface->pixels + y * surface->pitch + x * surface->format->BytesPerPixel;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
p[0] = (pixel >> 16) & 0xff;
p[1] = (pixel >> 8) & 0xff;
p[2] = pixel & 0xff;
#else
p[0] = pixel & 0xff;
p[1] = (pixel >> 8) & 0xff;
p[2] = (pixel >> 16) & 0xff;
#endif
};
inline void
putpixel16 (SDL_Surface * surface, int x, int y, Uint32 pixel)
{
/* Here p is the address to the pixel we want to set */
Uint8 *p = (Uint8 *) surface->pixels + y * surface->pitch + x * surface->format->BytesPerPixel;
*(Uint16 *) p = pixel;
};
void
scale (short int *dpattern, short int x, short int y)
{
@ -132,7 +199,7 @@ scale (short int *dpattern, short int x, short int y)
SDL_Surface *
scale_image (SDL_Surface * orginal, int newx, int newy)
scale_image (SDL_Surface *orginal, int newx, int newy)
{
Uint32 rmask,
gmask,
@ -141,6 +208,7 @@ scale_image (SDL_Surface * orginal, int newx, int newy)
SDL_Surface *surface;
int y,
x;
int bpp = orginal->format->BytesPerPixel;
short int xpattern[SCALE_MAXRES];
short int ypattern[SCALE_MAXRES];
@ -155,7 +223,6 @@ scale_image (SDL_Surface * orginal, int newx, int newy)
gmask = 0x0000ff00;
bmask = 0x000000ff;
amask = 0xff000000;
#endif /* */
surface = SDL_CreateRGBSurface (SDL_SWSURFACE, newx, newy, 32, rmask, gmask, bmask, amask);
@ -182,9 +249,29 @@ scale_image (SDL_Surface * orginal, int newx, int newy)
/* do the scaling work */
scale (xpattern, orginal->w - 1, newx);
scale (ypattern, orginal->h - 1, newy);
switch (bpp) {
case (2):
for (x = newx - 1; x >= 0; x--)
for (y = newy - 1; y >= 0; y--)
putpixel16 (surface, x, y, getpixel16 (orginal, xpattern[x], ypattern[y]));
break;
case (3):
for (x = newx - 1; x >= 0; x--)
for (y = newy - 1; y >= 0; y--)
putpixel24 (surface, x, y, getpixel24 (orginal, xpattern[x], ypattern[y]));
break;
case (4):
for (x = newx - 1; x >= 0; x--)
for (y = newy - 1; y >= 0; y--)
putpixel (surface, x, y, getpixel (orginal, xpattern[x], ypattern[y]));
putpixel32 (surface, x, y, getpixel32 (orginal, xpattern[x], ypattern[y]));
break;
default:
printf ("scale_image, wrong bpp value (%d).\n", bpp);
exit (1);
break;
}
if (SDL_MUSTLOCK (orginal)) {
SDL_UnlockSurface (orginal);
}
@ -204,7 +291,8 @@ makegray_image (SDL_Surface * org)
Uint32 pixel,
transpixel = 0;
SDL_Surface *dest;
int y,
int bpp = org->format->BytesPerPixel,
y,
x;
Uint8 r,
g,
@ -242,9 +330,12 @@ makegray_image (SDL_Surface * org)
}
return NULL;
}
switch (bpp) {
case (2):
for (x = 0; x < org->w; x++)
for (y = 0; y < org->h; y++) {
pixel = getpixel (org, x, y);
pixel = getpixel16 (org, x, y);
if (x == 0 && y == 0)
transpixel = pixel;
if (pixel != transpixel) {
@ -252,8 +343,43 @@ makegray_image (SDL_Surface * org)
gray = (r / 3 + g / 3 + b / 3);
pixel = SDL_MapRGB (dest->format, gray, gray, gray);
}
putpixel (dest, x, y, pixel);
putpixel16 (dest, x, y, pixel);
}
break;
case (3):
for (x = 0; x < org->w; x++)
for (y = 0; y < org->h; y++) {
pixel = getpixel24 (org, x, y);
if (x == 0 && y == 0)
transpixel = pixel;
if (pixel != transpixel) {
SDL_GetRGB (pixel, org->format, &r, &g, &b);
gray = (r / 3 + g / 3 + b / 3);
pixel = SDL_MapRGB (dest->format, gray, gray, gray);
}
putpixel24 (dest, x, y, pixel);
}
break;
case (4):
for (x = 0; x < org->w; x++)
for (y = 0; y < org->h; y++) {
pixel = getpixel32 (org, x, y);
if (x == 0 && y == 0)
transpixel = pixel;
if (pixel != transpixel) {
SDL_GetRGB (pixel, org->format, &r, &g, &b);
gray = (r / 3 + g / 3 + b / 3);
pixel = SDL_MapRGB (dest->format, gray, gray, gray);
}
putpixel32 (dest, x, y, pixel);
}
break;
default:
printf ("gray_image, wrong bpp value (%d).\n", bpp);
exit (1);
break;
}
if (SDL_MUSTLOCK (org)) {
SDL_UnlockSurface (org);
}

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