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color mapping changes

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This commit is contained in:
IonutParau 2025-07-26 16:45:08 +02:00
parent e9e02a2473
commit 6a90d6306d
4 changed files with 70 additions and 12 deletions
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34
src/components/screen.c
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@ -360,6 +360,27 @@ void nn_getStd4BitPalette(int color[16]) {
color[15] = nni_mcBlack; // black
}
void nn_getLegacy4BitPalette(int color[16]) {
// taken from https://github.com/MightyPirates/OpenComputers/blob/master-MC1.12/src/main/scala/li/cil/oc/util/PackedColor.scala
color[0] = 0xFFFFFF;
color[1] = 0xFFCC33;
color[2] = 0xCC66CC;
color[3] = 0x6699FF;
color[4] = 0xFFFF33;
color[5] = 0x33CC33;
color[6] = 0xFF6699;
color[7] = 0x333333;
color[8] = 0xCCCCCC;
color[9] = 0x336699;
color[10] = 0x9933CC;
color[11] = 0x333399;
color[12] = 0x663300;
color[13] = 0x336600;
color[14] = 0xFF3333;
color[15] = 0x000000;
}
void nn_getStd8BitPalette(int color[256]) {
// source: https://ocdoc.cil.li/component:gpu
int reds[6] = {0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF};
@ -399,18 +420,29 @@ static nn_bool_t nni_4bit_did = false;
static int nni_8bit_colors[256];
static nn_bool_t nni_8bit_did = false;
int nn_mapDepth(int color, int depth) {
static int nni_4bitl_colors[16];
static nn_bool_t nni_4bitl_did = false;
int nn_mapDepth(int color, int depth, nn_bool_t legacy) {
if(depth == 1) {
if(color == 0) return nni_mcBlack;
return nni_mcWhite;
}
if(depth == 4) {
if(legacy) {
if(!nni_4bitl_did) {
nni_4bitl_did = true;
nn_getLegacy4BitPalette(nni_4bitl_colors);
}
return nn_mapColor(color, nni_4bitl_colors, 16);
} else {
if(!nni_4bit_did) {
nni_4bit_did = true;
nn_getStd4BitPalette(nni_4bit_colors);
}
return nn_mapColor(color, nni_4bit_colors, 16);
}
}
if(depth == 8) {
if(!nni_8bit_did) {
nni_8bit_did = true;

26
src/emulator.c
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@ -557,8 +557,11 @@ typedef struct ne_premappedPixel {
int mappedFgRes;
int mappedBgFor;
int mappedBgRes;
nn_bool_t legacyColors;
} ne_premappedPixel;
bool ne_legacyColors = false;
ne_premappedPixel ne_getPremap(ne_premappedPixel *pixels, nn_screen *screen, int x, int y) {
int maxW, maxH;
nn_maxResolution(screen, &maxW, &maxH);
@ -571,6 +574,11 @@ ne_premappedPixel ne_getPremap(ne_premappedPixel *pixels, nn_screen *screen, int
int fg = pixel.fg;
int bg = pixel.bg;
if(premapped.legacyColors != ne_legacyColors) {
premapped.legacyColors = ne_legacyColors;
premapped.mappedDepth = -1;
}
if(premapped.mappedDepth != depth) {
premapped.mappedDepth = depth;
premapped.mappedFgFor = -1;
@ -578,14 +586,15 @@ ne_premappedPixel ne_getPremap(ne_premappedPixel *pixels, nn_screen *screen, int
}
bool miss = false;
if(premapped.mappedFgFor != fg) {
premapped.mappedFgFor = fg;
premapped.mappedFgRes = nn_mapDepth(fg, depth);
premapped.mappedFgRes = nn_mapDepth(fg, depth, ne_legacyColors);
miss = true;
}
if(premapped.mappedBgFor != bg) {
premapped.mappedBgFor = bg;
premapped.mappedBgRes = nn_mapDepth(bg, depth);
premapped.mappedBgRes = nn_mapDepth(bg, depth, ne_legacyColors);
miss = true;
}
premapped.codepoint = pixel.codepoint;
@ -914,6 +923,19 @@ int main(int argc, char **argv) {
}
render:
if(IsKeyPressed(KEY_F1)) {
nn_setDepth(s, 1);
}
if(IsKeyPressed(KEY_F2)) {
nn_setDepth(s, 4);
}
if(IsKeyPressed(KEY_F3)) {
nn_setDepth(s, 8);
}
if(IsKeyPressed(KEY_F4)) {
ne_legacyColors = !ne_legacyColors;
}
BeginDrawing();
ClearBackground(BLACK);

6
src/neonucleus.h
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@ -894,10 +894,14 @@ const char *nn_depthName(int depth);
double nn_colorDistance(int colorA, int colorB);
int nn_mapColor(int color, int *palette, int paletteSize);
int nn_mapDepth(int color, int depth);
int nn_mapDepth(int color, int depth, nn_bool_t legacy);
void nn_getStd4BitPalette(int color[16]);
void nn_getStd8BitPalette(int color[256]);
// Std4bit uses actual MC dye colors, except for white and black
// Legacy uses OC's versions that were brightened
void nn_getLegacy4BitPalette(int color[16]);
void nn_setPixel(nn_screen *screen, int x, int y, nn_scrchr_t pixel);
nn_scrchr_t nn_getPixel(nn_screen *screen, int x, int y);

2
src/utils.c
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@ -218,7 +218,7 @@ double nn_colorDistance(int colorA, int colorB) {
delta.g = a.g - b.g;
delta.b = a.b - b.b;
return delta.r*delta.r + delta.g*delta.g + delta.b*delta.b;
return 0.2126 * delta.r*delta.r + 0.7152 * delta.g*delta.g + 0.0722 * delta.b*delta.b;
}
int nn_mapColor(int color, int *palette, int paletteSize) {