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engines/sword25/gfx/image/renderedimage.cpp
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266
engines/sword25/gfx/image/renderedimage.cpp
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/*
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* This code is based on Broken Sword 2.5 engine
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*
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* Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
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*
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* Licensed under GNU GPL v2
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*
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*/
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// -----------------------------------------------------------------------------
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// INCLUDES
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// -----------------------------------------------------------------------------
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#include "common/savefile.h"
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#include "sword25/package/packagemanager.h"
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#include "sword25/gfx/image/imgloader.h"
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#include "sword25/gfx/image/renderedimage.h"
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#include "sword25/gfx/renderobjectmanager.h"
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#include "common/system.h"
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#include "graphics/thumbnail.h"
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namespace Sword25 {
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// -----------------------------------------------------------------------------
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// CONSTRUCTION / DESTRUCTION
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// -----------------------------------------------------------------------------
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/**
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* Load a NULL-terminated string from the given stream.
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*/
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static Common::String loadString(Common::SeekableReadStream &in, uint maxSize = 999) {
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Common::String result;
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while (!in.eos() && (result.size() < maxSize)) {
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char ch = (char)in.readByte();
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if (ch == '\0')
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break;
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result += ch;
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}
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return result;
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}
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static byte *readSavegameThumbnail(const Common::String &filename, uint &fileSize, bool &isPNG) {
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byte *pFileData;
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Common::SaveFileManager *sfm = g_system->getSavefileManager();
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Common::InSaveFile *file = sfm->openForLoading(lastPathComponent(filename, '/'));
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if (!file)
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error("Save file \"%s\" could not be loaded.", filename.c_str());
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// Seek to the actual PNG image
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loadString(*file); // Marker (BS25SAVEGAME)
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Common::String storedVersionID = loadString(*file); // Version
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if (storedVersionID != "SCUMMVM1")
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loadString(*file);
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loadString(*file); // Description
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uint32 compressedGamedataSize = atoi(loadString(*file).c_str());
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loadString(*file); // Uncompressed game data size
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file->skip(compressedGamedataSize); // Skip the game data and move to the thumbnail itself
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uint32 thumbnailStart = file->pos();
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fileSize = file->size() - thumbnailStart;
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// Check if the thumbnail is in our own format, or a PNG file.
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uint32 header = file->readUint32BE();
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isPNG = (header != MKTAG('S','C','R','N'));
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file->seek(-4, SEEK_CUR);
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pFileData = new byte[fileSize];
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file->read(pFileData, fileSize);
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delete file;
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return pFileData;
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}
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RenderedImage::RenderedImage(const Common::String &filename, bool &result) :
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_alphaType(Graphics::ALPHA_FULL) {
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result = false;
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PackageManager *pPackage = Kernel::getInstance()->getPackage();
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assert(pPackage);
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_backSurface = Kernel::getInstance()->getGfx()->getSurface();
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// Load file
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byte *pFileData;
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uint fileSize;
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bool isPNG = true;
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if (filename.hasPrefix("/saves")) {
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pFileData = readSavegameThumbnail(filename, fileSize, isPNG);
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} else {
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pFileData = pPackage->getFile(filename, &fileSize);
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}
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if (!pFileData) {
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error("File \"%s\" could not be loaded.", filename.c_str());
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return;
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}
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// Uncompress the image
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if (isPNG)
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result = ImgLoader::decodePNGImage(pFileData, fileSize, _surface.surfacePtr());
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else
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result = ImgLoader::decodeThumbnailImage(pFileData, fileSize, _surface.surfacePtr());
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if (!result) {
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error("Could not decode image.");
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delete[] pFileData;
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return;
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}
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// Cleanup FileData
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delete[] pFileData;
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_doCleanup = true;
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_alphaType = _surface.detectAlpha();
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return;
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}
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// -----------------------------------------------------------------------------
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RenderedImage::RenderedImage(uint width, uint height, bool &result) :
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_alphaType(Graphics::ALPHA_FULL) {
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_surface.create(width, height, Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0));
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_backSurface = Kernel::getInstance()->getGfx()->getSurface();
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_doCleanup = true;
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result = true;
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return;
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}
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RenderedImage::RenderedImage() : _alphaType(Graphics::ALPHA_FULL) {
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_backSurface = Kernel::getInstance()->getGfx()->getSurface();
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_surface.format = Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0);
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_doCleanup = false;
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return;
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}
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// -----------------------------------------------------------------------------
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RenderedImage::~RenderedImage() {
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if (_doCleanup) {
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_surface.free();
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}
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}
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// -----------------------------------------------------------------------------
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bool RenderedImage::fill(const Common::Rect *pFillRect, uint color) {
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error("Fill() is not supported.");
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return false;
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}
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// -----------------------------------------------------------------------------
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bool RenderedImage::setContent(const byte *pixeldata, uint size, uint offset, uint stride) {
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// Check if PixelData contains enough pixel to create an image with image size equals width * height
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if (size < static_cast<uint>(_surface.w * _surface.h * 4)) {
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error("PixelData vector is too small to define a 32 bit %dx%d image.", _surface.w, _surface.h);
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return false;
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}
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const byte *in = &pixeldata[offset];
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byte *out = (byte *)_surface.getPixels();
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for (int i = 0; i < _surface.h; i++) {
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memcpy(out, in, _surface.w * 4);
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out += _surface.w * 4;
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in += stride;
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}
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return true;
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}
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void RenderedImage::replaceContent(byte *pixeldata, int width, int height) {
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_surface.w = width;
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_surface.h = height;
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_surface.pitch = width * 4;
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_surface.setPixels(pixeldata);
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}
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// -----------------------------------------------------------------------------
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uint RenderedImage::getPixel(int x, int y) {
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error("GetPixel() is not supported. Returning black.");
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return 0;
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}
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// -----------------------------------------------------------------------------
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bool RenderedImage::blit(int posX, int posY, int flipping, Common::Rect *pPartRect, uint color, int width, int height, RectangleList *updateRects) {
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int newFlipping = (((flipping & 1) ? Graphics::FLIP_V : 0) | ((flipping & 2) ? Graphics::FLIP_H : 0));
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int ca = (color >> BS_ASHIFT) & 0xff;
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int cr = (color >> BS_RSHIFT) & 0xff;
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int cg = (color >> BS_GSHIFT) & 0xff;
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int cb = (color >> BS_BSHIFT) & 0xff;
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Common::Rect srcRect = pPartRect ? *pPartRect : Common::Rect(_surface.w, _surface.h);
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if (width == -1) width = srcRect.width();
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if (height == -1) height = srcRect.height();
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_backSurface->blendBlitFrom(_surface, srcRect, Common::Rect(posX, posY, posX + width, posY + height),
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newFlipping, _surface.format.ARGBToColor(ca, cr, cg, cb), Graphics::BLEND_NORMAL, _alphaType);
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return true;
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}
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void RenderedImage::copyDirectly(int posX, int posY) {
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byte *data = (byte *)_surface.getPixels();
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int w = _surface.w;
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int h = _surface.h;
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// Handle off-screen clipping
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if (posY < 0) {
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h = MAX(0, (int)_surface.h - -posY);
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data = (byte *)_surface.getPixels() + _surface.w * -posY;
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posY = 0;
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}
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if (posX < 0) {
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w = MAX(0, (int)_surface.h - -posX);
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data = (byte *)_surface.getPixels() + (-posX * 4);
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posX = 0;
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}
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w = CLIP((int)w, 0, (int)MAX((int)_backSurface->w - posX, 0));
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h = CLIP((int)h, 0, (int)MAX((int)_backSurface->h - posY, 0));
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g_system->copyRectToScreen(data, _backSurface->pitch, posX, posY, w, h);
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}
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} // End of namespace Sword25
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