Renamed graphics/scaler/thumbnail.cpp to thumbnail_intern.cpp. Fixes compiling under MSVC.

svn-id: r34063

1 files changed, 218 insertions, 0 deletions

diff --git a/graphics/scaler/thumbnail_intern.cpp b/graphics/scaler/thumbnail_intern.cpp
new file mode 100644
index 0000000000..bdfa0ff5f6
--- /dev/null
+++ b/graphics/scaler/thumbnail_intern.cpp
@@ -0,0 +1,218 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/scummsys.h"
+#include "common/system.h"
+
+#include "graphics/colormasks.h"
+#include "graphics/scaler.h"
+#include "graphics/scaler/intern.h"
+
+template<int bitFormat>
+uint16 quadBlockInterpolate(const uint8* src, uint32 srcPitch) {
+	uint16 colorx1y1 = *(((const uint16*)src));
+	uint16 colorx2y1 = *(((const uint16*)src) + 1);
+
+	uint16 colorx1y2 = *(((const uint16*)(src + srcPitch)));
+	uint16 colorx2y2 = *(((const uint16*)(src + srcPitch)) + 1);
+
+	return interpolate32_1_1_1_1<bitFormat>(colorx1y1, colorx2y1, colorx1y2, colorx2y2);
+}
+
+template<int bitFormat>
+void createThumbnail_2(const uint8* src, uint32 srcPitch, uint8* dstPtr, uint32 dstPitch, int width, int height) {
+	assert(width % 2 == 0);
+	assert(height % 2 == 0);
+	for (int y = 0; y < height; y += 2) {
+		for (int x = 0; x < width; x += 2, dstPtr += 2) {
+			*((uint16*)dstPtr) = quadBlockInterpolate<bitFormat>(src + 2 * x, srcPitch);
+		}
+		dstPtr += (dstPitch - 2 * width / 2);
+		src += 2 * srcPitch;
+	}
+}
+
+template<int bitFormat>
+void createThumbnail_4(const uint8* src, uint32 srcPitch, uint8* dstPtr, uint32 dstPitch, int width, int height) {
+	assert(width % 4 == 0);
+	assert(height % 4 == 0);
+	for (int y = 0; y < height; y += 4) {
+		for (int x = 0; x < width; x += 4, dstPtr += 2) {
+			uint16 upleft = quadBlockInterpolate<bitFormat>(src + 2 * x, srcPitch);
+			uint16 upright = quadBlockInterpolate<bitFormat>(src + 2 * (x + 2), srcPitch);
+			uint16 downleft = quadBlockInterpolate<bitFormat>(src + srcPitch * 2 + 2 * x, srcPitch);
+			uint16 downright = quadBlockInterpolate<bitFormat>(src + srcPitch * 2 + 2 * (x + 2), srcPitch);
+
+			*((uint16*)dstPtr) = interpolate32_1_1_1_1<bitFormat>(upleft, upright, downleft, downright);
+		}
+		dstPtr += (dstPitch - 2 * width / 4);
+		src += 4 * srcPitch;
+	}
+}
+
+void createThumbnail(const uint8* src, uint32 srcPitch, uint8* dstPtr, uint32 dstPitch, int width, int height) {
+	// only 1/2 and 1/4 downscale supported
+	if (width != 320 && width != 640)
+		return;
+
+	int downScaleMode = (width == 320) ? 2 : 4;
+
+	if (downScaleMode == 2) {
+		if (gBitFormat == 565)
+			createThumbnail_2<565>(src, srcPitch, dstPtr, dstPitch, width, height);
+		else if (gBitFormat == 555)
+			createThumbnail_2<555>(src, srcPitch, dstPtr, dstPitch, width, height);
+	} else if (downScaleMode == 4) {
+		if (gBitFormat == 565)
+			createThumbnail_4<565>(src, srcPitch, dstPtr, dstPitch, width, height);
+		else if (gBitFormat == 555)
+			createThumbnail_4<555>(src, srcPitch, dstPtr, dstPitch, width, height);
+	}
+}
+
+
+/**
+ * Copies the current screen contents to a new surface, using RGB565 format.
+ * WARNING: surf->free() must be called by the user to avoid leaking.
+ *
+ * @param surf		the surface to store the data in it
+ */
+static bool grabScreen565(Graphics::Surface *surf) {
+	Graphics::Surface *screen = g_system->lockScreen();
+	if (!screen)
+		return false;
+
+	assert(screen->bytesPerPixel == 1 && screen->pixels != 0);
+
+	byte palette[256 * 4];
+	g_system->grabPalette(&palette[0], 0, 256);
+
+	surf->create(screen->w, screen->h, 2);
+
+	for (uint y = 0; y < screen->h; ++y) {
+		for (uint x = 0; x < screen->w; ++x) {
+			byte r, g, b;
+			r = palette[((uint8*)screen->pixels)[y * screen->pitch + x] * 4];
+			g = palette[((uint8*)screen->pixels)[y * screen->pitch + x] * 4 + 1];
+			b = palette[((uint8*)screen->pixels)[y * screen->pitch + x] * 4 + 2];
+
+			((uint16*)surf->pixels)[y * surf->w + x] = RGBToColor<ColorMasks<565> >(r, g, b);
+		}
+	}
+
+	g_system->unlockScreen();
+	return true;
+}
+
+static bool createThumbnail(Graphics::Surface &out, Graphics::Surface &in) {
+	uint16 width = in.w;
+	uint16 inHeight = in.h;
+
+	if (width < 320) {
+		// Special case to handle MM NES (uses a screen width of 256)
+		width = 320;
+
+		// center MM NES screen
+		Graphics::Surface newscreen;
+		newscreen.create(width, in.h, in.bytesPerPixel);
+
+		uint8 *dst = (uint8*)newscreen.getBasePtr((320 - in.w) / 2, 0);
+		const uint8 *src = (uint8*)in.getBasePtr(0, 0);
+		uint16 height = in.h;
+
+		while (height--) {
+			memcpy(dst, src, in.pitch);
+			dst += newscreen.pitch;
+			src += in.pitch;
+		}
+
+		in.free();
+		in = newscreen;
+	} else if (width == 720) {
+		// Special case to handle Hercules mode
+		width = 640;
+		inHeight = 400;
+
+		// cut off menu and so on..
+		Graphics::Surface newscreen;
+		newscreen.create(width, 400, in.bytesPerPixel);
+
+		uint8 *dst = (uint8*)in.getBasePtr(0, (400 - 240) / 2);
+		const uint8 *src = (uint8*)in.getBasePtr(41, 28);
+
+		for (int y = 0; y < 240; ++y) {
+			memcpy(dst, src, 640 * in.bytesPerPixel);
+			dst += newscreen.pitch;
+			src += in.pitch;
+		}
+
+		in.free();
+		in = newscreen;
+	}
+
+	uint16 newHeight = !(inHeight % 240) ? kThumbnailHeight2 : kThumbnailHeight1;
+
+	int gBitFormatBackUp = gBitFormat;
+	gBitFormat = 565;
+	out.create(kThumbnailWidth, newHeight, sizeof(uint16));
+	createThumbnail((const uint8 *)in.pixels, width * sizeof(uint16), (uint8 *)out.pixels, out.pitch, width, inHeight);
+	gBitFormat = gBitFormatBackUp;
+
+	in.free();
+
+	return true;
+}
+
+bool createThumbnailFromScreen(Graphics::Surface* surf) {
+	assert(surf);
+
+	Graphics::Surface screen;
+
+	if (!grabScreen565(&screen))
+		return false;
+
+	return createThumbnail(*surf, screen);
+}
+
+bool createThumbnail(Graphics::Surface *surf, const uint8 *pixels, int w, int h, const uint8 *palette) {
+	assert(surf);
+
+	Graphics::Surface screen;
+	screen.create(w, h, 2);
+
+	for (uint y = 0; y < screen.h; ++y) {
+		for (uint x = 0; x < screen.w; ++x) {
+			byte r, g, b;
+			r = palette[pixels[y * w + x] * 3];
+			g = palette[pixels[y * w + x] * 3 + 1];
+			b = palette[pixels[y * w + x] * 3 + 2];
+
+			((uint16 *)screen.pixels)[y * screen.w + x] = RGBToColor<ColorMasks<565> >(r, g, b);
+		}
+	}
+
+	return createThumbnail(*surf, screen);
+}
+