Hi, I have a Clie SJ20 which supports HiRes 16 grayscale. However, the default
HiRes mode is B&W. One needs to explicitly set the screen depth to 4 in order
to get HiRes 16 grayscale. I hope the following code from Vexed source can
help:
Err err;
UInt16 cBpp;
UInt32 dwVer;
UInt32 dwDepth = 0;
UInt32 dwDepthsSupported = 0;
static Int16 gaBpps[] = { 0 /*24*/, 0 /* 16 */, 8, 4, 2, 1 };
Int8 n;
FtrGet(sysFtrCreator, sysFtrNumROMVersion, &dwVer);
if (dwVer < 0x03003000) {
cBpp = 1;
return cBpp;
}
// Get the depths supported
WinScreenMode(winScreenModeGetSupportedDepths, NULL, NULL, &dwDepthsSupported,
NULL);
// Set the highest depth possible
cBpp = 1;
for (n = 0; n < 6; n++) {
if (dwDepthsSupported & (1UL << (gaBpps[n] - 1))) {
WinScreenMode(winScreenModeGet, NULL, NULL, &dwDepth, NULL);
if (dwDepth != gaBpps[n]) {
dwDepth = gaBpps[n];
err = WinScreenMode(winScreenModeSet, NULL, NULL,
&dwDepth, NULL);
if (err == 0) {
cBpp = (int)dwDepth;
break;
}
} else {
cBpp = (int)dwDepth;
break;
}
}
}
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