Removed gamma support since it wasn't widely used and not well supported.
This commit is contained in:
Sam Lantinga
parent
c4f308a1be
commit
e0f869b698
24 changed files with 28 additions and 1137 deletions
194
test/testgamma.c
194
test/testgamma.c
|
|
@ -1,194 +0,0 @@
|
|||
|
||||
/* Bring up a window and manipulate the gamma on it */
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <math.h>
|
||||
|
||||
#include "SDL.h"
|
||||
|
||||
/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
|
||||
static void
|
||||
quit(int rc)
|
||||
{
|
||||
SDL_Quit();
|
||||
exit(rc);
|
||||
}
|
||||
|
||||
/* Turn a normal gamma value into an appropriate gamma ramp */
|
||||
void
|
||||
CalculateGamma(double gamma, Uint16 * ramp)
|
||||
{
|
||||
int i, value;
|
||||
|
||||
gamma = 1.0 / gamma;
|
||||
for (i = 0; i < 256; ++i) {
|
||||
value = (int) (pow((double) i / 256.0, gamma) * 65535.0 + 0.5);
|
||||
if (value > 65535) {
|
||||
value = 65535;
|
||||
}
|
||||
ramp[i] = (Uint16) value;
|
||||
}
|
||||
}
|
||||
|
||||
/* This can be used as a general routine for all of the test programs */
|
||||
int
|
||||
get_video_args(char *argv[], int *w, int *h, int *bpp, Uint32 * flags)
|
||||
{
|
||||
int i;
|
||||
|
||||
*w = 640;
|
||||
*h = 480;
|
||||
*bpp = 0;
|
||||
*flags = SDL_SWSURFACE;
|
||||
|
||||
for (i = 1; argv[i]; ++i) {
|
||||
if (strcmp(argv[i], "-width") == 0) {
|
||||
if (argv[i + 1]) {
|
||||
*w = atoi(argv[++i]);
|
||||
}
|
||||
} else if (strcmp(argv[i], "-height") == 0) {
|
||||
if (argv[i + 1]) {
|
||||
*h = atoi(argv[++i]);
|
||||
}
|
||||
} else if (strcmp(argv[i], "-bpp") == 0) {
|
||||
if (argv[i + 1]) {
|
||||
*bpp = atoi(argv[++i]);
|
||||
}
|
||||
} else if (strcmp(argv[i], "-fullscreen") == 0) {
|
||||
*flags |= SDL_FULLSCREEN;
|
||||
} else if (strcmp(argv[i], "-hw") == 0) {
|
||||
*flags |= SDL_HWSURFACE;
|
||||
} else if (strcmp(argv[i], "-hwpalette") == 0) {
|
||||
*flags |= SDL_HWPALETTE;
|
||||
} else
|
||||
break;
|
||||
}
|
||||
return i;
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
SDL_Surface *screen;
|
||||
SDL_Surface *image;
|
||||
float gamma;
|
||||
int i;
|
||||
int w, h, bpp;
|
||||
Uint32 flags;
|
||||
Uint16 ramp[256];
|
||||
Uint16 red_ramp[256];
|
||||
Uint32 then, timeout;
|
||||
|
||||
/* Check command line arguments */
|
||||
argv += get_video_args(argv, &w, &h, &bpp, &flags);
|
||||
|
||||
/* Initialize SDL */
|
||||
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
|
||||
fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
|
||||
return (1);
|
||||
}
|
||||
|
||||
/* Initialize the display, always use hardware palette */
|
||||
screen = SDL_SetVideoMode(w, h, bpp, flags | SDL_HWPALETTE);
|
||||
if (screen == NULL) {
|
||||
fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
|
||||
w, h, SDL_GetError());
|
||||
quit(1);
|
||||
}
|
||||
|
||||
/* Set the window manager title bar */
|
||||
SDL_WM_SetCaption("SDL gamma test", "testgamma");
|
||||
|
||||
/* Set the desired gamma, if any */
|
||||
gamma = 1.0f;
|
||||
if (*argv) {
|
||||
gamma = (float) atof(*argv);
|
||||
}
|
||||
if (SDL_SetGamma(gamma, gamma, gamma) < 0) {
|
||||
fprintf(stderr, "Unable to set gamma: %s\n", SDL_GetError());
|
||||
quit(1);
|
||||
}
|
||||
#if 0 /* This isn't supported. Integrating the gamma ramps isn't exact */
|
||||
/* See what gamma was actually set */
|
||||
float real[3];
|
||||
if (SDL_GetGamma(&real[0], &real[1], &real[2]) < 0) {
|
||||
printf("Couldn't get gamma: %s\n", SDL_GetError());
|
||||
} else {
|
||||
printf("Set gamma values: R=%2.2f, G=%2.2f, B=%2.2f\n",
|
||||
real[0], real[1], real[2]);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Do all the drawing work */
|
||||
image = SDL_LoadBMP("sample.bmp");
|
||||
if (image) {
|
||||
SDL_Rect dst;
|
||||
|
||||
dst.x = (screen->w - image->w) / 2;
|
||||
dst.y = (screen->h - image->h) / 2;
|
||||
dst.w = image->w;
|
||||
dst.h = image->h;
|
||||
SDL_BlitSurface(image, NULL, screen, &dst);
|
||||
SDL_UpdateRects(screen, 1, &dst);
|
||||
}
|
||||
|
||||
/* Wait a bit, handling events */
|
||||
then = SDL_GetTicks();
|
||||
timeout = (5 * 1000);
|
||||
while ((SDL_GetTicks() - then) < timeout) {
|
||||
SDL_Event event;
|
||||
|
||||
while (SDL_PollEvent(&event)) {
|
||||
switch (event.type) {
|
||||
case SDL_QUIT: /* Quit now */
|
||||
timeout = 0;
|
||||
break;
|
||||
case SDL_KEYDOWN:
|
||||
switch (event.key.keysym.sym) {
|
||||
case SDLK_SPACE: /* Go longer.. */
|
||||
timeout += (5 * 1000);
|
||||
break;
|
||||
case SDLK_UP:
|
||||
gamma += 0.2f;
|
||||
SDL_SetGamma(gamma, gamma, gamma);
|
||||
break;
|
||||
case SDLK_DOWN:
|
||||
gamma -= 0.2f;
|
||||
SDL_SetGamma(gamma, gamma, gamma);
|
||||
break;
|
||||
case SDLK_ESCAPE:
|
||||
timeout = 0;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Perform a gamma flash to red using color ramps */
|
||||
while (gamma < 10.0) {
|
||||
/* Increase the red gamma and decrease everything else... */
|
||||
gamma += 0.1f;
|
||||
CalculateGamma(gamma, red_ramp);
|
||||
CalculateGamma(1.0 / gamma, ramp);
|
||||
SDL_SetGammaRamp(red_ramp, ramp, ramp);
|
||||
}
|
||||
/* Finish completely red */
|
||||
memset(red_ramp, 255, sizeof(red_ramp));
|
||||
memset(ramp, 0, sizeof(ramp));
|
||||
SDL_SetGammaRamp(red_ramp, ramp, ramp);
|
||||
|
||||
/* Now fade out to black */
|
||||
for (i = (red_ramp[0] >> 8); i >= 0; --i) {
|
||||
memset(red_ramp, i, sizeof(red_ramp));
|
||||
SDL_SetGammaRamp(red_ramp, NULL, NULL);
|
||||
}
|
||||
SDL_Delay(1 * 1000);
|
||||
|
||||
SDL_Quit();
|
||||
return (0);
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue