diff options
Diffstat (limited to 'graphics/scaler/thumbnail_intern.cpp')
| -rw-r--r-- | graphics/scaler/thumbnail_intern.cpp | 218 |
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); +} + |