/* if requested bpp is not found the mode with closest bpp is returned */
int
get_mode_any_format(int width, int height, int bpp)
{
int i, closest, delta, min_delta;
if (PgGetVideoModeList(&mode_list) < 0) {
return -1;
}
SDL_qsort(mode_list.modes, mode_list.num_modes, sizeof(unsigned short),
compare_modes_by_res);
for (i = 0; i < mode_list.num_modes; i++) {
if (PgGetVideoModeInfo(mode_list.modes[i], &mode_info) < 0) {
return 0;
}
if ((mode_info.width == width) && (mode_info.height == height)) {
break;
}
}
if (i < mode_list.num_modes) {
/* get closest bpp */
closest = i++;
if (mode_info.bits_per_pixel == bpp) {
return mode_list.modes[closest];
}
min_delta = abs(mode_info.bits_per_pixel - bpp);
while (1) {
if (PgGetVideoModeInfo(mode_list.modes[i], &mode_info) < 0) {
return 0;
}
if ((mode_info.width != width)
|| (mode_info.height != height)) {
break;
} else {
if (mode_info.bits_per_pixel == bpp) {
closest = i;
break;
} else {
delta = abs(mode_info.bits_per_pixel - bpp);
if (delta < min_delta) {
closest = i;
min_delta = delta;
}
i++;
}
}
}
return mode_list.modes[closest];
}
return 0;
}
/* if there is no mode then zero is returned */
int ph_GetVideoMode(int width, int height, int bpp)
{
int i;
int modestage=0;
int closestmode=0;
if (PgGetVideoModeList(&mode_list) < 0)
{
return -1;
}
/* special case for the double-sized 320x200 mode */
if ((width==640) && (height==400))
{
modestage=1;
}
/* search list for exact match */
for (i=0; i<mode_list.num_modes; i++)
{
if (PgGetVideoModeInfo(mode_list.modes[i], &mode_info) < 0)
{
return 0;
}
if ((mode_info.width == width) && (mode_info.height == height) &&
(mode_info.bits_per_pixel == bpp))
{
return mode_list.modes[i];
}
else
{
if ((modestage) && (mode_info.width == width) && (mode_info.height == height+80) &&
(mode_info.bits_per_pixel == bpp))
{
modestage=2;
closestmode=mode_list.modes[i];
}
}
}
/* if we are here, then no 640x400xbpp mode found and we'll emulate it via 640x480xbpp mode */
if (modestage==2)
{
return closestmode;
}
return (i == mode_list.num_modes) ? 0 : mode_list.modes[i];
}