/**
* Set Width/Height/BitDepth according to passed GEMRES_640x480,
* GEMRES_800x600, GEMRES_OTHER. Align size when necessary.
*/
void VDI_SetResolution(int GEMColor, int WidthRequest, int HeightRequest)
{
/* Color depth */
switch (GEMColor)
{
case GEMCOLOR_2:
VDIRes = 2;
VDIPlanes = 1;
VDIColors = 2;
VDICharHeight = 16;
break;
case GEMCOLOR_4:
VDIRes = 1;
VDIPlanes = 2;
VDIColors = 4;
VDICharHeight = 8;
break;
case GEMCOLOR_16:
VDIRes = 0;
VDIPlanes = 4;
VDIColors = 16;
VDICharHeight = 8;
break;
}
/* width needs to be aligned to 16 bytes */
VDIWidth = VDI_Limit(WidthRequest, 128/VDIPlanes, MIN_VDI_WIDTH, MAX_VDI_WIDTH);
/* height needs to be multiple of cell height */
VDIHeight = VDI_Limit(HeightRequest, VDICharHeight, MIN_VDI_HEIGHT, MAX_VDI_HEIGHT);
printf("VDI screen: request = %dx%d@%d, aligned result = %dx%d@%d\n",
WidthRequest, HeightRequest, VDIPlanes, VDIWidth, VDIHeight, VDIPlanes);
/* Write resolution to re-boot takes effect with correct bit-depth */
VDI_FixDesktopInf();
}
/**
* Set Width/Height/BitDepth according to passed GEMCOLOR_2/4/16.
* Align size when necessary.
*/
void VDI_SetResolution(int GEMColor, int WidthRequest, int HeightRequest)
{
int w = WidthRequest;
int h = HeightRequest;
/* Color depth */
switch (GEMColor)
{
case GEMCOLOR_2:
VDIRes = 2;
VDIPlanes = 1;
break;
case GEMCOLOR_4:
VDIRes = 1;
VDIPlanes = 2;
break;
case GEMCOLOR_16:
VDIRes = 0;
VDIPlanes = 4;
break;
}
/* screen size in bytes needs to be below limit */
VDI_ByteLimit(&w, &h, VDIPlanes);
/* width needs to be aligned to 16 bytes */
VDIWidth = VDI_Limit(w, 128/VDIPlanes, MIN_VDI_WIDTH, MAX_VDI_WIDTH);
/* height needs to be multiple of cell height (either 8 or 16) */
VDIHeight = VDI_Limit(h, 16, MIN_VDI_HEIGHT, MAX_VDI_HEIGHT);
printf("VDI screen: request = %dx%d@%d, result = %dx%d@%d\n",
WidthRequest, HeightRequest, VDIPlanes, VDIWidth, VDIHeight, VDIPlanes);
/* Write resolution to re-boot takes effect with correct bit-depth */
VDI_FixDesktopInf();
}
