scummvm/engines/mohawk/graphics.cpp

234 lines
6.7 KiB
C++

/* 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.
*
*/
#include "mohawk/mohawk.h"
#include "mohawk/resource.h"
#include "mohawk/graphics.h"
#include "common/system.h"
#include "engines/util.h"
#include "graphics/palette.h"
namespace Mohawk {
MohawkSurface::MohawkSurface() : _surface(0), _palette(0) {
_offsetX = 0;
_offsetY = 0;
}
MohawkSurface::MohawkSurface(Graphics::Surface *surface, byte *palette, int offsetX, int offsetY) : _palette(palette), _offsetX(offsetX), _offsetY(offsetY) {
assert(surface);
_surface = surface;
}
MohawkSurface::~MohawkSurface() {
free(_palette);
if (_surface) {
_surface->free();
delete _surface;
}
}
void MohawkSurface::convertToTrueColor() {
assert(_surface);
if (_surface->format.bytesPerPixel > 1)
return;
assert(_palette);
Graphics::Surface *surface = _surface->convertTo(g_system->getScreenFormat(), _palette);
// Free everything and set the new surface as the converted surface
_surface->free();
delete _surface;
free(_palette);
_palette = 0;
_surface = surface;
}
GraphicsManager::GraphicsManager() {
}
GraphicsManager::~GraphicsManager() {
clearCache();
}
void GraphicsManager::clearCache() {
for (Common::HashMap<uint16, MohawkSurface *>::iterator it = _cache.begin(); it != _cache.end(); it++)
delete it->_value;
for (Common::HashMap<uint16, Common::Array<MohawkSurface *> >::iterator it = _subImageCache.begin(); it != _subImageCache.end(); it++) {
Common::Array<MohawkSurface *> &array = it->_value;
for (uint i = 0; i < array.size(); i++)
delete array[i];
}
_cache.clear();
_subImageCache.clear();
}
MohawkSurface *GraphicsManager::findImage(uint16 id) {
if (!_cache.contains(id))
_cache[id] = decodeImage(id);
// TODO: Probably would be nice to limit the size of the cache
// Currently, this can't get large because it is freed on every
// card/stack change in Myst/Riven so I'm not worried about it.
// Doesn't mean this shouldn't be done in the future.
return _cache[id];
}
Common::Array<MohawkSurface *> GraphicsManager::decodeImages(uint16 id) {
error("decodeImages not implemented for this game");
}
void GraphicsManager::preloadImage(uint16 image) {
findImage(image);
}
void GraphicsManager::setPalette(uint16 id) {
Common::SeekableReadStream *tpalStream = getVM()->getResource(ID_TPAL, id);
uint16 colorStart = tpalStream->readUint16BE();
uint16 colorCount = tpalStream->readUint16BE();
byte *palette = new byte[colorCount * 3];
for (uint16 i = 0; i < colorCount; i++) {
palette[i * 3 + 0] = tpalStream->readByte();
palette[i * 3 + 1] = tpalStream->readByte();
palette[i * 3 + 2] = tpalStream->readByte();
tpalStream->readByte();
}
delete tpalStream;
getVM()->_system->getPaletteManager()->setPalette(palette, colorStart, colorCount);
delete[] palette;
}
void GraphicsManager::copyAnimImageToScreen(uint16 image, int left, int top) {
Graphics::Surface *surface = findImage(image)->getSurface();
Common::Rect srcRect(0, 0, surface->w, surface->h);
Common::Rect dstRect(left, top, left + surface->w, top + surface->h);
copyAnimImageSectionToScreen(image, srcRect, dstRect);
}
void GraphicsManager::copyAnimImageSectionToScreen(uint16 image, Common::Rect srcRect, Common::Rect dstRect) {
copyAnimImageSectionToScreen(findImage(image), srcRect, dstRect);
}
void GraphicsManager::copyAnimSubImageToScreen(uint16 image, uint16 subimage, int left, int top) {
if (!_subImageCache.contains(image))
_subImageCache[image] = decodeImages(image);
Common::Array<MohawkSurface *> &images = _subImageCache[image];
Graphics::Surface *surface = images[subimage]->getSurface();
Common::Rect srcRect(0, 0, surface->w, surface->h);
Common::Rect dstRect(left, top, left + surface->w, top + surface->h);
copyAnimImageSectionToScreen(images[subimage], srcRect, dstRect);
}
void GraphicsManager::getSubImageSize(uint16 image, uint16 subimage, uint16 &width, uint16 &height) {
if (!_subImageCache.contains(image))
_subImageCache[image] = decodeImages(image);
Common::Array<MohawkSurface *> &images = _subImageCache[image];
Graphics::Surface *surface = images[subimage]->getSurface();
width = surface->w;
height = surface->h;
}
void GraphicsManager::copyAnimImageSectionToScreen(MohawkSurface *image, Common::Rect srcRect, Common::Rect dstRect) {
uint16 startX = 0;
uint16 startY = 0;
assert(srcRect.isValidRect() && dstRect.isValidRect());
assert(srcRect.left >= 0 && srcRect.top >= 0);
// TODO: clip rect
if (dstRect.left < 0) {
startX -= dstRect.left;
dstRect.left = 0;
}
if (dstRect.top < 0) {
startY -= dstRect.top;
dstRect.top = 0;
}
if (dstRect.left >= getVM()->_system->getWidth())
return;
if (dstRect.top >= getVM()->_system->getHeight())
return;
Graphics::Surface *surface = image->getSurface();
if (startX >= surface->w)
return;
if (startY >= surface->h)
return;
if (srcRect.left > surface->w)
return;
if (srcRect.top > surface->h)
return;
if (srcRect.right > surface->w)
srcRect.right = surface->w;
if (srcRect.bottom > surface->h)
srcRect.bottom = surface->h;
uint16 width = MIN<int>(srcRect.right - srcRect.left - startX, getVM()->_system->getWidth() - dstRect.left);
uint16 height = MIN<int>(srcRect.bottom - srcRect.top - startY, getVM()->_system->getHeight() - dstRect.top);
byte *surf = (byte *)surface->getBasePtr(0, srcRect.top + startY);
Graphics::Surface *screen = getVM()->_system->lockScreen();
// image and screen should always be 8bpp
for (uint16 y = 0; y < height; y++) {
byte *dest = (byte *)screen->getBasePtr(dstRect.left, dstRect.top + y);
byte *src = surf + srcRect.left + startX;
// blit, with 0 being transparent
for (uint16 x = 0; x < width; x++) {
if (*src)
*dest = *src;
src++;
dest++;
}
surf += surface->pitch;
}
getVM()->_system->unlockScreen();
}
void GraphicsManager::addImageToCache(uint16 id, MohawkSurface *surface) {
if (_cache.contains(id))
error("Image %d already in cache", id);
_cache[id] = surface;
}
} // End of namespace Mohawk