139 lines
3.7 KiB
C++
139 lines
3.7 KiB
C++
/* 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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#include "ultima/ultima8/gumps/inverter_gump.h"
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#include "ultima/ultima8/gfx/render_surface.h"
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#include "ultima/ultima8/ultima8.h"
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namespace Ultima {
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namespace Ultima8 {
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DEFINE_RUNTIME_CLASSTYPE_CODE(InverterGump)
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InverterGump::InverterGump(int32 x, int32 y, int32 width, int32 height)
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: DesktopGump(x, y, width, height) {
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_buffer = nullptr;
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}
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InverterGump::~InverterGump() {
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delete _buffer;
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}
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static inline int getLine(int index, int n) {
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index = index % (2 * n);
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if (index >= n)
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return 2 * n - 1 - 2 * (index - n);
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else
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return 2 * index;
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}
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static inline int getIndex(int line, int n) {
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if (line % 2 == 0)
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return line / 2;
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else
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return 2 * n - 1 - (line / 2);
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}
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void InverterGump::Paint(RenderSurface *surf, int32 lerp_factor, bool scaled) {
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// Skip the clipping rect/origin setting, since they will already be set
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// correctly by our parent.
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// (Or maybe I'm just to lazy to figure out the correct coordinates
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// to use to compensate for the flipping... -wjp :-) )
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// Don't paint if hidden
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if (IsHidden()) return;
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// Paint This
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PaintThis(surf, lerp_factor, scaled);
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// Paint children
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PaintChildren(surf, lerp_factor, scaled);
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}
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void InverterGump::PaintChildren(RenderSurface *surf, int32 lerp_factor, bool scaled) {
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unsigned int state = Ultima8Engine::get_instance()->getInversion();
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if (state == 0) {
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DesktopGump::PaintChildren(surf, lerp_factor, scaled);
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return;
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} else if (state == 0x8000) {
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bool old_flipped = surf->IsFlipped();
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surf->SetFlipped(!old_flipped);
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DesktopGump::PaintChildren(surf, lerp_factor, scaled);
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surf->SetFlipped(old_flipped);
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return;
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}
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int width = _dims.width(), height = _dims.height();
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// need a backbuffer
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if (!_buffer) {
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Graphics::Screen *screen = Ultima8Engine::get_instance()->getScreen();
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_buffer = new RenderSurface(width, height, screen->format);
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}
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_buffer->BeginPainting();
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DesktopGump::PaintChildren(_buffer, lerp_factor, scaled);
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_buffer->EndPainting();
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// now invert-blit _buffer to screen
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int t = (state * height) / 0x10000;
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for (int i = 0; i < height; ++i) {
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int src = getLine(getIndex(i, height / 2) + t, height / 2);
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Common::Rect srcRect(0, src, width, src + 1);
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surf->Blit(*_buffer->getRawSurface(), srcRect, 0, i);
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}
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}
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// Convert a parent relative point to a gump point
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void InverterGump::ParentToGump(int32 &px, int32 &py, PointRoundDir) {
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px -= _x;
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px += _dims.left;
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py -= _y;
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if (Ultima8Engine::get_instance()->isInverted()) py = _dims.height() - py - 1;
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py += _dims.top;
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}
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// Convert a gump point to parent relative point
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void InverterGump::GumpToParent(int32 &gx, int32 &gy, PointRoundDir) {
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gx -= _dims.left;
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gx += _x;
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gy -= _dims.top;
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if (Ultima8Engine::get_instance()->isInverted()) gy = _dims.height() - gy - 1;
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gy += _y;
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}
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void InverterGump::RenderSurfaceChanged() {
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DesktopGump::RenderSurfaceChanged();
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delete _buffer;
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_buffer = nullptr;
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}
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} // End of namespace Ultima8
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} // End of namespace Ultima
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