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Realised my colour error: mapping the ROM numbers as though they were the hardware numbers. Having fixed that, spotted that I was deserialising R and B the wrong way around and dividing by too much. Colours now appear to be correct.

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This commit is contained in:
Thomas Harte 2017-08-01 21:47:52 -04:00
parent c6e340a8a2
commit 4b6370eb86
1 changed files with 14 additions and 13 deletions
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27
Machines/AmstradCPC/AmstradCPC.cpp
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@ -161,7 +161,7 @@ class CRTCBusHandler {
"vec3 rgb_sample(usampler2D sampler, vec2 coordinate, vec2 icoordinate)"
"{"
"uint sample = texture(texID, coordinate).r;"
"return vec3(float(sample & 3u), float((sample >> 2) & 3u), float((sample >> 4) & 3u)) / 3.0;"
"return vec3(float((sample >> 4) & 3u), float((sample >> 2) & 3u), float(sample & 3u)) / 2.0;"
"}");
// TODO: better vectorise the above.
}
@ -183,24 +183,16 @@ class CRTCBusHandler {
}
void select_pen(int pen) {
printf("Pen %d:\n", pen);
pen_ = pen;
}
void set_colour(uint8_t colour) {
printf("Colour %d\n", colour);
if(pen_ & 16) {
printf("border: %d -> %02x\n", colour, mapped_palette_value(colour));
border_ = mapped_palette_value(colour);
// TODO: should flush any border currently in progress
} else {
palette_[pen_] = mapped_palette_value(colour);
// for(int c = 0; c < 16; c++) {
// printf("%02x ", palette_[c]);
// }
// printf("\n");
// TODO: no need for a full regeneration, of every mode, every time
for(int c = 0; c < 256; c++) {
// prepare mode 0
@ -235,10 +227,19 @@ class CRTCBusHandler {
private:
uint8_t mapped_palette_value(uint8_t colour) {
uint8_t r = (colour / 3) % 3;
uint8_t g = (colour / 9) % 3;
uint8_t b = colour % 3;
return (uint8_t)(r | (g << 2) | (b << 4));
#define COL(r, g, b) (r << 4) | (g << 2) | b
static const uint8_t mapping[32] = {
COL(1, 1, 1), COL(1, 1, 1), COL(0, 2, 1), COL(2, 2, 1),
COL(0, 0, 1), COL(2, 0, 1), COL(0, 1, 1), COL(2, 1, 1),
COL(2, 0, 1), COL(2, 2, 1), COL(2, 2, 0), COL(2, 2, 2),
COL(2, 0, 0), COL(2, 0, 2), COL(2, 1, 0), COL(2, 1, 1),
COL(0, 0, 1), COL(0, 2, 1), COL(0, 2, 0), COL(0, 2, 2),
COL(0, 0, 0), COL(0, 0, 2), COL(0, 1, 0), COL(0, 1, 2),
COL(1, 0, 1), COL(1, 2, 1), COL(1, 2, 0), COL(1, 2, 2),
COL(1, 0, 0), COL(1, 0, 2), COL(1, 1, 0), COL(1, 1, 2),
};
#undef COL
return mapping[colour];
}
unsigned int cycles_;