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https://github.com/dborth/vbagx.git
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335 lines
12 KiB
C++
335 lines
12 KiB
C++
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "../System.h"
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#include "../NLS.h"
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#include "gb.h"
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#include "gbCheats.h"
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#include "gbGlobals.h"
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#include "vba.h"
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#include "../ngc/menu.h"
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bool ColorizeGameboy = true;
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// The 14-colour palette for a monochrome gameboy game
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// bg black, bg dark, bg light, bg white, window black, window dark, window light, window white,
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// obj0 dark, obj0 light, obj0 white, obj1 dark, obj1 light, obj1 white
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// Only the user sets these colours from emulator menu, and it is only read
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// by the palette setting functions.
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u16 systemMonoPalette[14];
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// quickly map the 12 possible indices to 15-bit colours
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// bg index 0..3, obj0 index 0..3, obj1 index 0..3
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// This is set internally by the palette setting functions, and used by the
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// drawing functions.
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//u16 gbPalette[12];
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const float BL[4] = {0.1f, 0.4f, 0.7f, 1.0f};
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u16 changeColourBrightness(u16 rgb, float factor) {
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if (factor==1.0f) return rgb;
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int bonus = 0;
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int r = (rgb & 0x1f);
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r = r * factor;
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if (r>31) {
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r=31;
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bonus+=(r-30)/2;
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}
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int g = ((rgb >> 5) & 0x1f);
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g = g * factor;
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if (g>31) {
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g=31;
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bonus+=(g-30)/2;
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}
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int b = ((rgb >> 10) & 0x1f);
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b = b * factor;
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if (b>31) {
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b=31;
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bonus+=(b-30)/2;
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}
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r+=bonus;
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g+=bonus;
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b+=bonus;
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if (r>31) r=31;
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if (g>31) g=31;
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if (b>31) b=31;
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return r | (g << 5) | (b << 10);
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}
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u8 oldBgp = 0xFC;
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// Sets the brightnesses of both the background and window palettes
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void gbSetBGPalette(u8 value, bool ColoursChanged=false) {
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static u8 DarkestToBrightestIndex[4] = {3, 2, 1, 0};
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static u8 Darkness[4] = {0, 1, 2, 3};
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static float BrightnessForBrightest=1, BrightnessForDarkest=0.1; // brightness of palette when indexes are right
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// darkness of each index (0 = white, 3 = black)
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gbBgp[0] = value & 0x03;
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gbBgp[1] = (value & 0x0c)>>2;
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gbBgp[2] = (value & 0x30)>>4;
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gbBgp[3] = (value & 0xc0)>>6;
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if ((value==oldBgp && !ColoursChanged) || gbSgbMode || !ColorizeGameboy) return;
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// check for duplicates
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bool dup = false;
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for (int i=0; i<=2; i++)
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for (int j=i+1; j<=3; j++)
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if (gbBgp[i]==gbBgp[j]) {
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dup=true;
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break;
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}
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if (!dup) { // no duplicates, therefore a complete palette change
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// now we need to map them from darkest to brightest
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int Colour = 0;
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for (int darkness = 3; darkness>=0; darkness--) {
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for (int index=0; index<=3; index++) {
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if (gbBgp[index]==darkness) {
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DarkestToBrightestIndex[Colour]=index;
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Darkness[Colour]=gbBgp[index];
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Colour++;
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break;
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}
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}
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}
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// brightness of brightest colour
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BrightnessForBrightest = BL[3-gbBgp[DarkestToBrightestIndex[3]]];
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BrightnessForDarkest = BL[3-gbBgp[DarkestToBrightestIndex[0]]];
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} else { // duplicates implies fading in or out
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// since we are really trying to fade, not change palette,
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// rely on previous DarkestToBrightest list
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}
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float NewBrightnessForBrightest = BL[3-gbBgp[DarkestToBrightestIndex[3]]];
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float BrightnessFactor;
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// check if they are trying to make the palette brighter
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if (NewBrightnessForBrightest==1.0f && BrightnessForBrightest==1.0f) {
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float NewBrightnessForDarkest = BL[3-gbBgp[DarkestToBrightestIndex[0]]];
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BrightnessFactor = NewBrightnessForDarkest/BrightnessForDarkest;
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} else {
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BrightnessFactor = NewBrightnessForBrightest/BrightnessForBrightest;
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}
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// BG colours
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for (int colour = 0; colour <= 3; colour++) {
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u16 colourRGB = systemMonoPalette[colour];
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float colourBrightness = BL[colour];
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float indexBrightness = BL[3-Darkness[colour]]*BrightnessFactor;
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gbPalette[0+DarkestToBrightestIndex[colour]] = changeColourBrightness(colourRGB, indexBrightness/colourBrightness);
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}
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// Window colours
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for (int colour = 0; colour <= 3; colour++) {
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u16 colourRGB = systemMonoPalette[4+colour];
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float colourBrightness = BL[colour];
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float indexBrightness = BL[3-Darkness[colour]]*BrightnessFactor;
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gbPalette[4+DarkestToBrightestIndex[colour]] = changeColourBrightness(colourRGB, indexBrightness/colourBrightness);
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}
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}
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u8 oldObp0 = 0xFF;
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void gbSetObj0Palette(u8 value, bool ColoursChanged = false) {
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static u8 DarkestToBrightestIndex[3] = {3, 2, 1};
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static u8 Darkness[3] = {1, 2, 3};
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static float BrightnessForBrightest, BrightnessForDarkest; // brightness of palette when indexes are right
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// darkness of each index (0 = white, 3 = black)
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gbObp0[0] = value & 0x03;
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gbObp0[1] = (value & 0x0c)>>2;
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gbObp0[2] = (value & 0x30)>>4;
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gbObp0[3] = (value & 0xc0)>>6;
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if ((value==oldObp0 && !ColoursChanged) || gbSgbMode || !ColorizeGameboy) return;
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// check for duplicates
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bool dup = false;
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for (int i=1; i<=2; i++)
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for (int j=i+1; j<=3; j++)
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if (gbObp0[i]==gbObp0[j]) {
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dup=true;
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break;
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}
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if (!dup) { // no duplicates, therefore a complete palette change
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// now we need to map them from darkest to brightest
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int Colour = 0;
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for (int darkness = 3; darkness>=0; darkness--) {
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for (int index=1; index<=3; index++) {
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if (gbObp0[index]==darkness) {
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DarkestToBrightestIndex[Colour]=index;
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Darkness[Colour]=gbObp0[index];
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Colour++;
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break;
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}
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}
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}
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// brightness of brightest colour
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BrightnessForBrightest = BL[3-gbObp0[DarkestToBrightestIndex[2]]];
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BrightnessForDarkest = BL[3-gbObp0[DarkestToBrightestIndex[0]]];
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} else { // duplicates implies fading in or out
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// since we are really trying to fade, not change palette,
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// rely on previous DarkestToBrightest list
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}
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float NewBrightnessForBrightest = BL[3-gbObp0[DarkestToBrightestIndex[2]]];
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float BrightnessFactor;
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// check if they are trying to make the palette brighter
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if (NewBrightnessForBrightest==1.0f && BrightnessForBrightest==1.0f) {
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float NewBrightnessForDarkest = BL[3-gbObp0[DarkestToBrightestIndex[0]]];
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BrightnessFactor = NewBrightnessForDarkest/BrightnessForDarkest;
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} else {
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BrightnessFactor = NewBrightnessForBrightest/BrightnessForBrightest;
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}
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for (int colour = 0; colour <= 2; colour++) {
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u16 colourRGB = systemMonoPalette[colour+8];
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float colourBrightness = BL[colour+1];
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float indexBrightness = BL[3-Darkness[colour]]*BrightnessFactor;
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gbPalette[8+DarkestToBrightestIndex[colour]] = changeColourBrightness(colourRGB, indexBrightness/colourBrightness);
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}
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gbPalette[8] = 0; // always transparent
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}
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u8 oldObp1 = 0xFF;
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void gbSetObj1Palette(u8 value, bool ColoursChanged = false) {
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static u8 DarkestToBrightestIndex[3] = {3, 2, 1};
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static u8 Darkness[3] = {1, 2, 3};
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static float BrightnessForBrightest, BrightnessForDarkest; // brightness of palette when indexes are right
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// darkness of each index (0 = white, 3 = black)
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gbObp1[0] = value & 0x03;
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gbObp1[1] = (value & 0x0c)>>2;
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gbObp1[2] = (value & 0x30)>>4;
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gbObp1[3] = (value & 0xc0)>>6;
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if ((value==oldObp1 && !ColoursChanged) || gbSgbMode || !ColorizeGameboy) return;
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// check for duplicates
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bool dup = false;
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for (int i=1; i<=2; i++)
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for (int j=i+1; j<=3; j++)
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if (gbObp1[i]==gbObp1[j]) {
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dup=true;
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break;
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}
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if (!dup) { // no duplicates, therefore a complete palette change
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// now we need to map them from darkest to brightest
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int Colour = 0;
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for (int darkness = 3; darkness>=0; darkness--) {
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for (int index=1; index<=3; index++) {
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if (gbObp1[index]==darkness) {
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DarkestToBrightestIndex[Colour]=index;
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Darkness[Colour]=gbObp1[index];
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Colour++;
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break;
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}
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}
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}
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// brightness of brightest colour
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BrightnessForBrightest = BL[3-gbObp1[DarkestToBrightestIndex[2]]];
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BrightnessForDarkest = BL[3-gbObp1[DarkestToBrightestIndex[0]]];
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} else { // duplicates implies fading in or out
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// since we are really trying to fade, not change palette,
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// rely on previous DarkestToBrightest list
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}
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float NewBrightnessForBrightest = BL[3-gbObp1[DarkestToBrightestIndex[2]]];
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float BrightnessFactor;
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// check if they are trying to make the palette brighter
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if (NewBrightnessForBrightest==1.0f && BrightnessForBrightest==1.0f) {
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float NewBrightnessForDarkest = BL[3-gbObp1[DarkestToBrightestIndex[0]]];
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BrightnessFactor = NewBrightnessForDarkest/BrightnessForDarkest;
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} else {
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BrightnessFactor = NewBrightnessForBrightest/BrightnessForBrightest;
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}
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for (int colour = 0; colour <= 2; colour++) {
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u16 colourRGB = systemMonoPalette[colour+11];
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float colourBrightness = BL[colour+1];
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float indexBrightness = BL[3-Darkness[colour]]*BrightnessFactor;
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gbPalette[12+DarkestToBrightestIndex[colour]] = changeColourBrightness(colourRGB, indexBrightness/colourBrightness);
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}
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gbPalette[12] = 0; // always transparent
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}
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bool StartColorizing() {
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if ((!GCSettings.colorize) || gbSgbMode || gbCgbMode) return false;
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if (ColorizeGameboy) return true;
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ColorizeGameboy = true;
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gbSetBGPalette(oldBgp);
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gbSetObj0Palette(oldObp0);
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gbSetObj1Palette(oldObp1);
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return true;
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}
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void StopColorizing() {
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for(int i = 0; i < 12; i++)
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gbPalette[i] = systemGbPalette[gbPaletteOption*12+i];
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ColorizeGameboy = false;
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}
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// convert 0xRRGGBB to our 15 bit format
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u16 Make15Bit(u32 rgb) {
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return ((rgb >> 19) & 0x1F) | (((rgb >> 11) & 0x1F) << 5) | (((rgb >> 3) & 0x1F) << 10);
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}
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void gbSetSpritePal(u8 WhichPal, u32 bright, u32 medium, u32 dark) {
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if (!StartColorizing()) return;
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int index = 0;
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if (WhichPal==0) {
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gbSetSpritePal(1, bright, medium, dark);
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gbSetSpritePal(2, bright, medium, dark);
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return;
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} else if (WhichPal==1) index = 8; // Obj0
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else if (WhichPal==2) index=11; // Obj1
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systemMonoPalette[index]=Make15Bit(dark);
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systemMonoPalette[index+1]=Make15Bit(medium);
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systemMonoPalette[index+2]=Make15Bit(bright);
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if (WhichPal==1) {
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u8 old = oldObp0;
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oldObp0 +=1;
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gbSetObj0Palette(old);
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} else if (WhichPal==2) {
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u8 old = oldObp1;
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oldObp1 +=1;
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gbSetObj1Palette(old);
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}
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}
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void gbSetSpritePal(u8 WhichPal, u32 bright) {
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u8 r = (bright >> 16) & 0xFF;
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u8 g = (bright >> 8) & 0xFF;
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u8 b = (bright >> 0) & 0xFF;
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u32 medium = (((u32)(r*0.7f)) << 16) | (((u32)(g*0.7f)) << 8) | (((u32)(b*0.7f)) << 0);
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u32 dark = (((u32)(r*0.4f)) << 16) | (((u32)(g*0.4f)) << 8) | (((u32)(b*0.4f)) << 0);
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gbSetSpritePal(WhichPal, bright, medium, dark);
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}
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void gbSetBgPal(u8 WhichPal, u32 bright, u32 medium, u32 dark, u32 black=0x000000) {
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if (!StartColorizing()) return;
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int index = 0;
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if (WhichPal==0) {
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gbSetBgPal(1, bright, medium, dark, black);
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gbSetBgPal(2, bright, medium, dark, black);
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return;
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} else if (WhichPal==1) index = 0; // background
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else if (WhichPal==2) index=4; // window
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systemMonoPalette[index]=Make15Bit(black);
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systemMonoPalette[index+1]=Make15Bit(dark);
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systemMonoPalette[index+2]=Make15Bit(medium);
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systemMonoPalette[index+3]=Make15Bit(bright);
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gbSetBGPalette(oldBgp, true);
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}
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void gbSetBgPal(u8 WhichPal, u32 bright) {
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u8 r = (bright >> 16) & 0xFF;
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u8 g = (bright >> 8) & 0xFF;
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u8 b = (bright >> 0) & 0xFF;
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u32 medium = (((u32)(r*0.7f)) << 16) | (((u32)(g*0.7f)) << 8) | (((u32)(b*0.7f)) << 0);
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u32 dark = (((u32)(r*0.4f)) << 16) | (((u32)(g*0.4f)) << 8) | (((u32)(b*0.4f)) << 0);
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u32 black = (((u32)(r*0.1f)) << 16) | (((u32)(g*0.1f)) << 8) | (((u32)(b*0.1f)) << 0);
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gbSetBgPal(WhichPal, bright, medium, dark, black);
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}
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// Set the whole 14-colour palette
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void gbSetPalette(u32 RRGGBB[]) {
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gbSetBgPal(1, RRGGBB[0], RRGGBB[1], RRGGBB[2], RRGGBB[3]);
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gbSetBgPal(2, RRGGBB[4], RRGGBB[5], RRGGBB[6], RRGGBB[7]);
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gbSetSpritePal(1, RRGGBB[8], RRGGBB[9], RRGGBB[10]);
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gbSetSpritePal(2, RRGGBB[11], RRGGBB[12], RRGGBB[13]);
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}
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