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Support remainder of colour control.

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This commit is contained in:
Thomas Harte 2023-12-06 14:38:43 -05:00
parent 1c7f8841f4
commit ff000a5792
1 changed files with 53 additions and 35 deletions
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88
Machines/PCCompatible/CGA.hpp
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@ -103,8 +103,8 @@ class CGA {
crt(910, 8, Outputs::Display::Type::NTSC60, Outputs::Display::InputDataType::Red2Green2Blue2)
{
crt.set_visible_area(Outputs::Display::Rect(0.097f, 0.095f, 0.82f, 0.82f));
crt.set_display_type(Outputs::Display::DisplayType::CompositeColour); // TODO: needs to be a user option.
// crt.set_display_type(Outputs::Display::DisplayType::RGB); // TODO: needs to be a user option.
// crt.set_display_type(Outputs::Display::DisplayType::CompositeColour); // TODO: needs to be a user option.
crt.set_display_type(Outputs::Display::DisplayType::RGB); // TODO: needs to be a user option.
}
void set_mode(uint8_t control) {
@ -128,17 +128,34 @@ class CGA {
}
void set_colours(uint8_t value) {
// b5: 320x200 palette.
if(value & 0x20) {
palette[0] = 0b00'00'00;
palette[1] = 0b00'10'10;
palette[2] = 0b10'00'10;
palette[3] = 0b10'10'10;
palette320[1] = 0b00'10'10;
palette320[2] = 0b10'00'10;
palette320[3] = 0b10'10'10;
} else {
palette[0] = 0b00'00'00;
palette[1] = 0b00'10'00;
palette[2] = 0b10'00'00;
palette[3] = 0b10'10'00; // TODO: brown, here and elsewhere.
palette320[1] = 0b00'10'00;
palette320[2] = 0b10'00'00;
palette320[3] = 0b10'10'00; // TODO: brown, here and elsewhere.
}
// b4: set 320x200 palette into high intensity.
if(value & 0x10) {
palette320[1] |= palette320[1] >> 1;
palette320[2] |= palette320[2] >> 1;
palette320[3] |= palette320[3] >> 1;
}
// b3–b0: set background, border, monochrome colour.
palette320[0] = uint8_t(
((value & 0x01) << 1) |
((value & 0x02) << 2) |
((value & 0x04) << 3)
);
if(value & 0x08) {
palette320[0] |= palette320[0] >> 1;
}
palette640[1] = palette320[0];
}
uint8_t control() {
@ -254,31 +271,31 @@ class CGA {
};
if(mode_ == Mode::Pixels320) {
pixel_pointer[0] = palette[(bitmap[0] & 0xc0) >> 6];
pixel_pointer[1] = palette[(bitmap[0] & 0x30) >> 4];
pixel_pointer[2] = palette[(bitmap[0] & 0x0c) >> 2];
pixel_pointer[3] = palette[(bitmap[0] & 0x03) >> 0];
pixel_pointer[4] = palette[(bitmap[1] & 0xc0) >> 6];
pixel_pointer[5] = palette[(bitmap[1] & 0x30) >> 4];
pixel_pointer[6] = palette[(bitmap[1] & 0x0c) >> 2];
pixel_pointer[7] = palette[(bitmap[1] & 0x03) >> 0];
pixel_pointer[0] = palette320[(bitmap[0] & 0xc0) >> 6];
pixel_pointer[1] = palette320[(bitmap[0] & 0x30) >> 4];
pixel_pointer[2] = palette320[(bitmap[0] & 0x0c) >> 2];
pixel_pointer[3] = palette320[(bitmap[0] & 0x03) >> 0];
pixel_pointer[4] = palette320[(bitmap[1] & 0xc0) >> 6];
pixel_pointer[5] = palette320[(bitmap[1] & 0x30) >> 4];
pixel_pointer[6] = palette320[(bitmap[1] & 0x0c) >> 2];
pixel_pointer[7] = palette320[(bitmap[1] & 0x03) >> 0];
} else {
pixel_pointer[0x0] = palette[(bitmap[0] & 0x80) >> 7];
pixel_pointer[0x1] = palette[(bitmap[0] & 0x40) >> 6];
pixel_pointer[0x2] = palette[(bitmap[0] & 0x20) >> 5];
pixel_pointer[0x3] = palette[(bitmap[0] & 0x10) >> 4];
pixel_pointer[0x4] = palette[(bitmap[0] & 0x08) >> 3];
pixel_pointer[0x5] = palette[(bitmap[0] & 0x04) >> 2];
pixel_pointer[0x6] = palette[(bitmap[0] & 0x02) >> 1];
pixel_pointer[0x7] = palette[(bitmap[0] & 0x01) >> 0];
pixel_pointer[0x8] = palette[(bitmap[1] & 0x80) >> 7];
pixel_pointer[0x9] = palette[(bitmap[1] & 0x40) >> 6];
pixel_pointer[0xa] = palette[(bitmap[1] & 0x20) >> 5];
pixel_pointer[0xb] = palette[(bitmap[1] & 0x10) >> 4];
pixel_pointer[0xc] = palette[(bitmap[1] & 0x08) >> 3];
pixel_pointer[0xd] = palette[(bitmap[1] & 0x04) >> 2];
pixel_pointer[0xe] = palette[(bitmap[1] & 0x02) >> 1];
pixel_pointer[0xf] = palette[(bitmap[1] & 0x01) >> 0];
pixel_pointer[0x0] = palette640[(bitmap[0] & 0x80) >> 7];
pixel_pointer[0x1] = palette640[(bitmap[0] & 0x40) >> 6];
pixel_pointer[0x2] = palette640[(bitmap[0] & 0x20) >> 5];
pixel_pointer[0x3] = palette640[(bitmap[0] & 0x10) >> 4];
pixel_pointer[0x4] = palette640[(bitmap[0] & 0x08) >> 3];
pixel_pointer[0x5] = palette640[(bitmap[0] & 0x04) >> 2];
pixel_pointer[0x6] = palette640[(bitmap[0] & 0x02) >> 1];
pixel_pointer[0x7] = palette640[(bitmap[0] & 0x01) >> 0];
pixel_pointer[0x8] = palette640[(bitmap[1] & 0x80) >> 7];
pixel_pointer[0x9] = palette640[(bitmap[1] & 0x40) >> 6];
pixel_pointer[0xa] = palette640[(bitmap[1] & 0x20) >> 5];
pixel_pointer[0xb] = palette640[(bitmap[1] & 0x10) >> 4];
pixel_pointer[0xc] = palette640[(bitmap[1] & 0x08) >> 3];
pixel_pointer[0xd] = palette640[(bitmap[1] & 0x04) >> 2];
pixel_pointer[0xe] = palette640[(bitmap[1] & 0x02) >> 1];
pixel_pointer[0xf] = palette640[(bitmap[1] & 0x01) >> 0];
}
}
@ -347,7 +364,8 @@ class CGA {
Pixels640, Pixels320, Text,
} mode_ = Mode::Text;
uint8_t palette[4];
uint8_t palette320[4]{};
uint8_t palette640[2]{};
} outputter_;
Motorola::CRTC::CRTC6845<CRTCOutputter, Motorola::CRTC::CursorType::MDA> crtc_;