NEVERHOOD: More work on the Palette class

4 files changed, 101 insertions, 4 deletions

diff --git a/engines/neverhood/palette.cpp b/engines/neverhood/palette.cpp
index 385cadeef8..b45f8eeb78 100644
--- a/engines/neverhood/palette.cpp
+++ b/engines/neverhood/palette.cpp
@@ -32,13 +32,94 @@ Palette::Palette(NeverhoodEngine *vm) : Entity(vm, 0) {
 	SetUpdateHandler(&Palette::update);
 }
 
+Palette::Palette(NeverhoodEngine *vm, byte *palette) : Entity(vm, 0) {
+	_status = 0;
+	_palette = new byte[1024];
+	memcpy(_palette, palette, 1024);
+	SetUpdateHandler(&Palette::update);
+}
+
+Palette::Palette(NeverhoodEngine *vm, const char *filename) : Entity(vm, 0) {
+	PaletteResource paletteResource(_vm);
+	_status = 0;
+	_palette = new byte[1024];
+	// TODO: paletteResource.load(calcHash(filename));
+	// paletteResource.copyPalette(_palette);
+	SetUpdateHandler(&Palette::update);
+}
+
+Palette::Palette(NeverhoodEngine *vm, uint32 fileHash) : Entity(vm, 0) {
+	PaletteResource paletteResource(_vm);
+	_status = 0;
+	_palette = new byte[1024];
+	paletteResource.load(fileHash);
+	paletteResource.copyPalette(_palette);
+	SetUpdateHandler(&Palette::update);
+}
+
 Palette::~Palette() {
 	// TODO: _vm->_screen->unsetPaletteData(_palette);
 	delete[] _palette;
 }
 
+void Palette::usePalette() {
+	// TODO: _vm->_screen->setPaletteData(_palette);
+}
+
+void Palette::addPalette(const char *filename, int toIndex, int count, int fromIndex) {
+	// TODO: addPalette(calcHash(filename), toIndex, count, fromIndex);
+}
+
+void Palette::addPalette(uint32 fileHash, int toIndex, int count, int fromIndex) {
+	PaletteResource paletteResource(_vm);
+	if (toIndex + count > 256)
+		count = 256 - toIndex;
+	paletteResource.load(fileHash);
+	memcpy(_palette + toIndex * 4, paletteResource.palette() + fromIndex * 4, count * 4);		
+	// TODO: _vm->_screen->testPalette(_palette);
+}
+
+void Palette::startFadeToBlack(int counter) {
+	if (counter == 0)
+		counter = 1;
+	_fadeToR = 0;
+	_fadeToG = 0;
+	_fadeToB = 0;
+	_palCounter = counter;
+	_fadeStep = 255 / counter;
+	_status = 1;			
+}
+
+void Palette::startFadeToWhite(int counter) {
+	if (counter == 0)
+		counter = 1;
+	_fadeToR = 255;
+	_fadeToG = 255;
+	_fadeToB = 255;
+	_palCounter = counter;
+	_fadeStep = 255 / counter;
+	_status = 1;			
+}
+
 void Palette::update() {
-	// TODO
+	if (_status == 1) {
+		memset(_palette, 0, 1024);
+		_status = 0;
+	} else {
+		for (int i = 0; i < 256; i++) {
+			fadeColor(_palette + i * 4, _fadeToR, _fadeToG, _fadeToB);
+		}
+		// TODO: _vm->_screen->testPalette(_palette);
+		_palCounter--;
+	}
+}
+
+void Palette::fadeColor(byte *rgb, byte toR, byte toG, byte toB) {
+	#define FADE(color, toColor) color += _fadeStep < toColor - color ? _fadeStep : (-_fadeStep <= toColor - color ? toColor - color : -_fadeStep)
+	FADE(rgb[0], toR);
+	FADE(rgb[1], toG);
+	FADE(rgb[2], toB);
+	#undef FADE
 }
 
 } // End of namespace Neverhood
diff --git a/engines/neverhood/palette.h b/engines/neverhood/palette.h
index 961b4ac909..b29d77181b 100644
--- a/engines/neverhood/palette.h
+++ b/engines/neverhood/palette.h
@@ -32,11 +32,26 @@ class Palette : public Entity {
 public:
 	// Default constructor with black palette
 	Palette(NeverhoodEngine *vm);
+	// Create from existing palette
+	Palette(NeverhoodEngine *vm, byte *palette);
+	// Create from resource with filename
+	Palette(NeverhoodEngine *vm, const char *filename);
+	// Create from resource with fileHash
+	Palette(NeverhoodEngine *vm, uint32 fileHash);
 	~Palette();
+	void usePalette();
+	void addPalette(const char *filename, int toIndex, int count, int fromIndex);
+	void addPalette(uint32 fileHash, int toIndex, int count, int fromIndex);
+	void startFadeToBlack(int counter);
+	void startFadeToWhite(int counter);
 protected:
 	int _status;
 	byte *_palette;
+	int _palCounter;
+	byte _fadeToR, _fadeToG, _fadeToB;
+	int _fadeStep;
 	void update();
+	void fadeColor(byte *rgb, byte toR, byte toG, byte toB);
 };
 
 } // End of namespace Neverhood
diff --git a/engines/neverhood/resource.cpp b/engines/neverhood/resource.cpp
index 6c77c48fb7..2dd919c087 100644
--- a/engines/neverhood/resource.cpp
+++ b/engines/neverhood/resource.cpp
@@ -126,9 +126,9 @@ void PaletteResource::unload() {
 	}
 }
 
-void PaletteResource::getPalette(byte *palette) {
+void PaletteResource::copyPalette(byte *destPalette) {
 	if (_palette) {
-		memcpy(palette, _palette, 1024);
+		memcpy(destPalette, _palette, 1024);
 	} else {
 		// TODO?: buildDefaultPalette(palette);
 	}
diff --git a/engines/neverhood/resource.h b/engines/neverhood/resource.h
index 7f61af660a..7f699c54df 100644
--- a/engines/neverhood/resource.h
+++ b/engines/neverhood/resource.h
@@ -52,7 +52,8 @@ public:
 	~PaletteResource();
 	bool load(uint32 fileHash);
 	void unload();
-	void getPalette(byte *palette);
+	void copyPalette(byte *destPalette);
+	byte *palette() { return _palette; }
 protected:
 	NeverhoodEngine *_vm;
 	int _resourceHandle;