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engines/got/gfx/palette.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "got/gfx/palette.h"
+#include "common/events.h"
+#include "common/system.h"
+#include "got/got.h"
+#include "got/utils/file.h"
+#include "got/vars.h"
+#include "graphics/paletteman.h"
+
+namespace Got {
+namespace Gfx {
+
+#define FADE_STEPS 10
+
+static byte saved_palette[Graphics::PALETTE_SIZE];
+
+Palette63::Palette63(const byte *pal) {
+	for (uint i = 0; i < Graphics::PALETTE_SIZE; ++i)
+		_pal[i] = pal[i] << 2;
+}
+
+void loadPalette() {
+	if (resourceRead("PALETTE", saved_palette) < 0)
+		error("Cannot Read PALETTE");
+
+	g_system->getPaletteManager()->setPalette(saved_palette, 0, 256);
+}
+
+void setScreenPal() {
+	byte pal[3];
+
+	xGetPal(pal, 1, _G(scrn)._palColors[0]);
+	xSetPal(251, pal[0], pal[1], pal[2]);
+	xGetPal(pal, 1, _G(scrn)._palColors[1]);
+	xSetPal(252, pal[0], pal[1], pal[2]);
+	xGetPal(pal, 1, _G(scrn)._palColors[2]);
+	xSetPal(253, pal[0], pal[1], pal[2]);
+}
+
+void xSetPal(const byte color, const byte R, const byte G, const byte B) {
+	byte rgb[3] = {R, G, B};
+	g_system->getPaletteManager()->setPalette(rgb, color, 1);
+}
+
+void xSetPal(const byte *pal) {
+	g_system->getPaletteManager()->setPalette(pal, 0, Graphics::PALETTE_COUNT);
+}
+
+void setPalette(const byte *pal) {
+	xSetPal(pal);
+	Common::copy(pal, pal + Graphics::PALETTE_SIZE, saved_palette);
+}
+
+void xGetPal(byte *pal, const int numColors, const int startIndex) {
+	g_system->getPaletteManager()->grabPalette(pal, startIndex, numColors);
+}
+
+void fadeOut() {
+	byte tempPal[Graphics::PALETTE_SIZE];
+	const byte *srcP;
+	byte *destP;
+	int count;
+	Common::Event evt;
+
+	xGetPal(saved_palette, Graphics::PALETTE_COUNT, 0);
+
+	for (int step = FADE_STEPS - 1; step >= 0; --step) {
+		// Set each palette RGB proportionately
+		for (srcP = &saved_palette[0], destP = &tempPal[0], count = 0;
+			 count < Graphics::PALETTE_SIZE; ++count, ++srcP, ++destP) {
+			*destP = *srcP * step / FADE_STEPS;
+		}
+
+		// Set new palette
+		xSetPal(tempPal);
+
+		// Use up any pending events and update the screen
+		while (g_system->getEventManager()->pollEvent(evt)) {
+			if (evt.type == Common::EVENT_QUIT)
+				return;
+		}
+
+		g_events->getScreen()->update();
+		g_system->delayMillis(10);
+	}
+}
+
+void fadeIn(const byte *pal) {
+	byte tempPal[Graphics::PALETTE_SIZE];
+	const byte *srcP;
+	byte *destP;
+	int count;
+	Common::Event evt;
+
+	if (pal)
+		Common::copy(pal, pal + Graphics::PALETTE_SIZE, saved_palette);
+
+	// Start with a black palette
+	Common::fill(tempPal, tempPal + Graphics::PALETTE_SIZE, 0);
+	xSetPal(tempPal);
+
+	for (int step = 1; step <= FADE_STEPS; ++step) {
+		// Set each palette RGB proportionately
+		for (srcP = &saved_palette[0], destP = &tempPal[0], count = 0;
+			 count < Graphics::PALETTE_SIZE; ++count, ++srcP, ++destP) {
+			*destP = *srcP * step / FADE_STEPS;
+		}
+
+		// Set new palette
+		xSetPal(tempPal);
+
+		// Use up any pending events and update the screen
+		while (g_system->getEventManager()->pollEvent(evt)) {
+			if (evt.type == Common::EVENT_QUIT)
+				return;
+		}
+
+		g_events->getScreen()->update();
+		g_system->delayMillis(10);
+	}
+}
+
+} // namespace Gfx
+} // namespace Got