mirror of
https://github.com/libretro/scummvm.git
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63ec47e62f
Some of the game videos have alpha levels, which are lost if the surfaces are converted to 16-bit. This adds better support for creating 32-bit video surfaces, so the information won't be lost
105 lines
3.2 KiB
C++
105 lines
3.2 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
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "titanic/support/direct_draw_surface.h"
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namespace Titanic {
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DirectDrawSurface::DirectDrawSurface() : _surface(nullptr),
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_disposeAfterUse(DisposeAfterUse::YES) {
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}
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DirectDrawSurface::~DirectDrawSurface() {
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free();
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}
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void DirectDrawSurface::create(Graphics::ManagedSurface *surface) {
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free();
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_surface = surface;
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_disposeAfterUse = DisposeAfterUse::NO;
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}
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void DirectDrawSurface::create(int w, int h, int bpp) {
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assert(bpp == 16 || bpp == 32);
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Graphics::PixelFormat pixelFormat = (bpp == 32) ?
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Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0) :
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Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0);
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_surface = new Graphics::ManagedSurface(w, h, pixelFormat);
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_disposeAfterUse = DisposeAfterUse::YES;
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}
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void DirectDrawSurface::free() {
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if (_disposeAfterUse == DisposeAfterUse::YES)
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delete _surface;
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_surface = nullptr;
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_disposeAfterUse = DisposeAfterUse::NO;
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}
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Graphics::ManagedSurface *DirectDrawSurface::lock(const Rect *bounds, int flags) {
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assert(!_surface->empty());
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return _surface;
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}
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void DirectDrawSurface::unlock() {
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assert(_surface->w != 0 && _surface->h != 0);
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}
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void DirectDrawSurface::fill(const Rect *bounds, uint32 color) {
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Rect tempBounds;
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assert(_surface);
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if (bounds) {
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// Bounds are provided, clip them to the bounds of this surface
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tempBounds = *bounds;
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tempBounds.clip(Rect(0, 0, _surface->w, _surface->h));
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} else {
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// No bounds provided, so use the entire surface
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tempBounds = Rect(0, 0, _surface->w, _surface->h);
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}
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// Fill the area
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_surface->fillRect(tempBounds, color);
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}
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void DirectDrawSurface::fillRect(Rect *rect, byte r, byte g, byte b) {
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uint color = _surface->format.RGBToColor(r, g, b);
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Rect tempRect = rect ? *rect : Rect(0, 0, getWidth(), getHeight());
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_surface->fillRect(tempRect, color);
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}
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void DirectDrawSurface::blit(const Rect &destRect, DirectDrawSurface *srcSurface, Rect &srcRect) {
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assert(srcSurface);
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if (!destRect.isEmpty())
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_surface->transBlitFrom(*srcSurface->_surface, srcRect, destRect, (uint)-1);
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}
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void DirectDrawSurface::blit(const Point &destPos, DirectDrawSurface *srcSurface, Rect *bounds) {
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if (bounds)
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_surface->blitFrom(*srcSurface->_surface, *bounds, destPos);
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else
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_surface->blitFrom(*srcSurface->_surface, destPos);
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}
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} // End of namespace Titanic
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