diff options
Diffstat (limited to 'engines/toltecs/render.cpp')
-rw-r--r-- | engines/toltecs/render.cpp | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/engines/toltecs/render.cpp b/engines/toltecs/render.cpp new file mode 100644 index 0000000000..dd7dfc212f --- /dev/null +++ b/engines/toltecs/render.cpp @@ -0,0 +1,320 @@ +/* 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 "common/events.h" +#include "common/keyboard.h" +#include "common/file.h" +#include "common/savefile.h" +#include "common/config-manager.h" + +#include "base/plugins.h" +#include "base/version.h" + +#include "toltecs/toltecs.h" +#include "toltecs/render.h" +#include "toltecs/resource.h" + +namespace Toltecs { + +Common::Rect makeRect(int16 x, int16 y, int16 width, int16 height) { + Common::Rect rect; + rect.left = x; + rect.top = y; + rect.setWidth(width); + rect.setHeight(height); + return rect; +} + +RenderQueue::RenderQueue(ToltecsEngine *vm) : _vm(vm) { + _currQueue = new RenderQueueArray(); + _prevQueue = new RenderQueueArray(); + _updateUta = new MicroTileArray(640, 400); +} + +RenderQueue::~RenderQueue() { + delete _currQueue; + delete _prevQueue; + delete _updateUta; +} + +void RenderQueue::addSprite(SpriteDrawItem &sprite) { + + RenderQueueItem item; + item.type = kSprite; + item.flags = kRefresh; + item.rect = makeRect(sprite.x - _vm->_cameraX, sprite.y - _vm->_cameraY, sprite.width, sprite.height); + item.priority = sprite.priority; + + item.sprite = sprite; + item.sprite.x -= _vm->_cameraX; + item.sprite.y -= _vm->_cameraY; + + // Add sprite sorted by priority + RenderQueueArray::iterator iter = _currQueue->begin(); + while (iter != _currQueue->end() && (*iter).priority <= item.priority) { + iter++; + } + _currQueue->insert(iter, item); + +} + +void RenderQueue::addText(int16 x, int16 y, byte color, uint fontResIndex, byte *text, int len) { + + Font font(_vm->_res->load(fontResIndex)); + + RenderQueueItem item; + item.type = kText; + item.flags = kRefresh; + item.rect = makeRect(x, y, font.getTextWidth(text), font.getHeight()); + item.priority = 1000; + + item.text.color = color; + item.text.fontResIndex = fontResIndex; + item.text.text = text; + item.text.len = len; + + _currQueue->push_back(item); + +} + +void RenderQueue::addMask(SegmapMaskRect &mask) { + + RenderQueueItem item; + item.type = kMask; + item.flags = kRefresh; + item.rect = makeRect(mask.x - _vm->_cameraX, mask.y - _vm->_cameraY, mask.width, mask.height); + item.priority = mask.priority; + + item.mask = mask; + + // Only add the mask if a sprite intersects its rect + if (rectIntersectsItem(item.rect)) { + RenderQueueArray::iterator iter = _currQueue->begin(); + while (iter != _currQueue->end() && (*iter).priority <= item.priority) { + iter++; + } + _currQueue->insert(iter, item); + } + +} + +void RenderQueue::update() { + + bool doFullRefresh = _vm->_screen->_fullRefresh; + + _updateUta->clear(); + + if (!doFullRefresh) { + + for (RenderQueueArray::iterator iter = _currQueue->begin(); iter != _currQueue->end(); iter++) { + RenderQueueItem *item = &(*iter); + RenderQueueItem *prevItem = findItemInQueue(_prevQueue, *item); + if (prevItem) { + if (hasItemChanged(*prevItem, *item)) { + item->flags = kRefresh; + addDirtyRect(prevItem->rect); + } else { + item->flags = kUnchanged; + } + } else { + item->flags = kRefresh; + } + } + + for (RenderQueueArray::iterator iter = _prevQueue->begin(); iter != _prevQueue->end(); iter++) { + RenderQueueItem *prevItem = &(*iter); + RenderQueueItem *item = findItemInQueue(_currQueue, *prevItem); + if (!item) { + prevItem->flags = kRemoved; + addDirtyRect(prevItem->rect); + } + } + + restoreDirtyBackground(); + + for (RenderQueueArray::iterator iter = _currQueue->begin(); iter != _currQueue->end(); iter++) { + RenderQueueItem *item = &(*iter); + if (item->flags != kUnchanged) + invalidateItemsByRect(item->rect, item); + } + + } else { + byte *destp = _vm->_screen->_frontScreen; + byte *srcp = _vm->_screen->_backScreen + _vm->_cameraX + _vm->_cameraY * _vm->_sceneWidth; + int16 w = MIN<int16>(640, _vm->_sceneWidth); + int16 h = MIN<int16>(400, _vm->_cameraHeight); + while (h--) { + memcpy(destp, srcp, w); + destp += 640; + srcp += _vm->_sceneWidth; + } + _vm->_screen->_fullRefresh = false; + } + + for (RenderQueueArray::iterator iter = _currQueue->begin(); iter != _currQueue->end(); iter++) { + const RenderQueueItem *item = &(*iter); + + if (item->flags == kRefresh) { + + switch (item->type) { + case kSprite: + _vm->_screen->drawSprite(item->sprite); + break; + case kText: + _vm->_screen->drawString(item->rect.left, item->rect.top, item->text.color, item->text.fontResIndex, + item->text.text, item->text.len, NULL, true); + break; + case kMask: + _vm->_screen->drawSurface(item->rect.left, item->rect.top, item->mask.surface); + break; + default: + break; + } + + if (!doFullRefresh) + addDirtyRect(item->rect); + + } + + } + + if (doFullRefresh) { + clear(); + _vm->_system->copyRectToScreen((const byte *)_vm->_screen->_frontScreen, 640, 0, 0, 640, _vm->_cameraHeight); + } else { + updateDirtyRects(); + } + + SWAP(_currQueue, _prevQueue); + _currQueue->clear(); + +} + +void RenderQueue::clear() { + _prevQueue->clear(); + _currQueue->clear(); +} + +bool RenderQueue::rectIntersectsItem(const Common::Rect &rect) { + for (RenderQueueArray::iterator iter = _currQueue->begin(); iter != _currQueue->end(); iter++) { + const RenderQueueItem *item = &(*iter); + if (rect.intersects(item->rect)) + return true; + } + return false; +} + +RenderQueueItem *RenderQueue::findItemInQueue(RenderQueueArray *queue, const RenderQueueItem &item) { + /* This checks if the given item also exists in the previously drawn frame. + The state of the item (position, color etc) is handled elsewhere. + */ + for (RenderQueueArray::iterator iter = queue->begin(); iter != queue->end(); iter++) { + RenderQueueItem *prevItem = &(*iter); + if (prevItem->type == item.type) { + switch (item.type) { + case kSprite: + if (prevItem->sprite.resIndex == item.sprite.resIndex && + prevItem->sprite.frameNum == item.sprite.frameNum) + return prevItem; + break; + case kText: + if (prevItem->text.text == item.text.text && + prevItem->text.len == item.text.len) + return prevItem; + break; + case kMask: + if (prevItem->mask.surface == item.mask.surface) + return prevItem; + break; + } + } + } + return NULL; // Not found +} + +bool RenderQueue::hasItemChanged(const RenderQueueItem &item1, const RenderQueueItem &item2) { + + // TODO: Clean up. + + if (item1.type != item1.type) + return true; + + if (item1.rect.left != item2.rect.left || + item1.rect.top != item2.rect.top || + item1.rect.right != item2.rect.right || + item1.rect.bottom != item2.rect.bottom) + return true; + + if (item1.type == kText && item1.text.color != item2.text.color) + return true; + + return false; +} + +void RenderQueue::invalidateItemsByRect(const Common::Rect &rect, const RenderQueueItem *item) { + for (RenderQueueArray::iterator iter = _currQueue->begin(); iter != _currQueue->end(); iter++) { + RenderQueueItem *subItem = &(*iter); + if (item != subItem && + subItem->flags == kUnchanged && + rect.intersects(subItem->rect)) { + + subItem->flags = kRefresh; + invalidateItemsByRect(subItem->rect, subItem); + } + } +} + +void RenderQueue::addDirtyRect(const Common::Rect &rect) { + _updateUta->addRect(rect); +} + +void RenderQueue::restoreDirtyBackground() { + int n_rects = 0; + Common::Rect *rects = _updateUta->getRectangles(&n_rects, 0, 0, 639, _vm->_cameraHeight - 1); + for (int i = 0; i < n_rects; i++) { + byte *destp = _vm->_screen->_frontScreen + rects[i].left + rects[i].top * 640; + byte *srcp = _vm->_screen->_backScreen + (_vm->_cameraX + rects[i].left) + (_vm->_cameraY + rects[i].top) * _vm->_sceneWidth; + int16 w = rects[i].width(); + int16 h = rects[i].height(); + while (h--) { + memcpy(destp, srcp, w); + destp += 640; + srcp += _vm->_sceneWidth; + } + invalidateItemsByRect(rects[i], NULL); + } + delete[] rects; +} + +void RenderQueue::updateDirtyRects() { + int n_rects = 0; + Common::Rect *rects = _updateUta->getRectangles(&n_rects, 0, 0, 639, _vm->_cameraHeight - 1); + for (int i = 0; i < n_rects; i++) { + _vm->_system->copyRectToScreen((const byte *)_vm->_screen->_frontScreen + rects[i].left + rects[i].top * 640, + 640, rects[i].left, rects[i].top, rects[i].width(), rects[i].height()); + } + delete[] rects; +} + + +} // End of namespace Toltecs |