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https://github.com/libretro/scummvm.git
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342 lines
12 KiB
C++
342 lines
12 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 "graphics/managed_surface.h"
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#include "common/algorithm.h"
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#include "common/textconsole.h"
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namespace Graphics {
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const int SCALE_THRESHOLD = 0x100;
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ManagedSurface::ManagedSurface() :
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w(_innerSurface.w), h(_innerSurface.h), pitch(_innerSurface.pitch), format(_innerSurface.format),
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_disposeAfterUse(DisposeAfterUse::NO), _owner(nullptr) {
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}
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ManagedSurface::ManagedSurface(ManagedSurface &surf) :
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w(_innerSurface.w), h(_innerSurface.h), pitch(_innerSurface.pitch), format(_innerSurface.format),
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_disposeAfterUse(DisposeAfterUse::NO), _owner(nullptr) {
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*this = surf;
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}
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ManagedSurface::ManagedSurface(int width, int height) :
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w(_innerSurface.w), h(_innerSurface.h), pitch(_innerSurface.pitch), format(_innerSurface.format),
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_disposeAfterUse(DisposeAfterUse::NO), _owner(nullptr) {
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create(width, height);
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}
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ManagedSurface::ManagedSurface(int width, int height, const Graphics::PixelFormat &pixelFormat) :
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w(_innerSurface.w), h(_innerSurface.h), pitch(_innerSurface.pitch), format(_innerSurface.format),
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_disposeAfterUse(DisposeAfterUse::NO), _owner(nullptr) {
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create(width, height, pixelFormat);
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}
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ManagedSurface::ManagedSurface(ManagedSurface &surf, const Common::Rect &bounds) :
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w(_innerSurface.w), h(_innerSurface.h), pitch(_innerSurface.pitch), format(_innerSurface.format),
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_disposeAfterUse(DisposeAfterUse::NO), _owner(nullptr) {
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create(surf, bounds);
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}
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ManagedSurface::~ManagedSurface() {
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free();
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}
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ManagedSurface &ManagedSurface::operator=(ManagedSurface &surf) {
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// Free any current surface
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free();
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if (surf._disposeAfterUse == DisposeAfterUse::YES) {
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// Create a new surface and copy the pixels from the source surface
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create(surf.w, surf.h, surf.format);
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Common::copy((const byte *)surf.getPixels(), (const byte *)surf.getPixels() +
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surf.w * surf.h * surf.format.bytesPerPixel, (byte *)this->getPixels());
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} else {
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// Source isn't managed, so simply copy its fields
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_owner = surf._owner;
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_offsetFromOwner = surf._offsetFromOwner;
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void *srcPixels = surf._innerSurface.getPixels();
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_innerSurface.setPixels(srcPixels);
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_innerSurface.w = surf.w;
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_innerSurface.h = surf.h;
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_innerSurface.pitch = surf.pitch;
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this->format = surf.format;
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}
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return *this;
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}
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void ManagedSurface::setPixels(void *newPixels) {
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free();
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_innerSurface.setPixels(newPixels);
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}
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void ManagedSurface::create(uint16 width, uint16 height) {
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create(width, height, PixelFormat::createFormatCLUT8());
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}
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void ManagedSurface::create(uint16 width, uint16 height, const PixelFormat &pixelFormat) {
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free();
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_innerSurface.create(width, height, pixelFormat);
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_disposeAfterUse = DisposeAfterUse::YES;
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markAllDirty();
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}
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void ManagedSurface::create(ManagedSurface &surf, const Common::Rect &bounds) {
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free();
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_offsetFromOwner = Common::Point(bounds.left, bounds.top);
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_innerSurface.setPixels(surf.getBasePtr(bounds.left, bounds.top));
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_innerSurface.pitch = surf.pitch;
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_innerSurface.format = surf.format;
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_innerSurface.w = bounds.width();
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_innerSurface.h = bounds.height();
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_owner = &surf;
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_disposeAfterUse = DisposeAfterUse::NO;
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}
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void ManagedSurface::free() {
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if (_disposeAfterUse == DisposeAfterUse::YES)
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_innerSurface.free();
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_disposeAfterUse = DisposeAfterUse::NO;
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_owner = nullptr;
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_offsetFromOwner = Common::Point(0, 0);
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}
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bool ManagedSurface::clip(Common::Rect &srcBounds, Common::Rect &destBounds) {
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if (destBounds.left >= this->w || destBounds.top >= this->h ||
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destBounds.right <= 0 || destBounds.bottom <= 0)
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return false;
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// Clip the bounds if necessary to fit on-screen
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if (destBounds.right > this->w) {
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srcBounds.right -= destBounds.right - this->w;
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destBounds.right = this->w;
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}
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if (destBounds.bottom > this->h) {
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srcBounds.bottom -= destBounds.bottom - this->h;
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destBounds.bottom = this->h;
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}
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if (destBounds.top < 0) {
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srcBounds.top += -destBounds.top;
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destBounds.top = 0;
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}
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if (destBounds.left < 0) {
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srcBounds.left += -destBounds.left;
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destBounds.left = 0;
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}
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return true;
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}
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void ManagedSurface::blitFrom(const Surface &src) {
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blitFrom(src, Common::Rect(0, 0, src.w, src.h), Common::Point(0, 0));
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}
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void ManagedSurface::blitFrom(const Surface &src, const Common::Point &destPos) {
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blitFrom(src, Common::Rect(0, 0, src.w, src.h), destPos);
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}
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void ManagedSurface::blitFrom(const Surface &src, const Common::Rect &srcRect,
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const Common::Point &destPos) {
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Common::Rect srcBounds = srcRect;
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Common::Rect destBounds(destPos.x, destPos.y, destPos.x + srcRect.width(),
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destPos.y + srcRect.height());
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uint destPixel;
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byte rSrc, gSrc, bSrc, aSrc;
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byte rDest, gDest, bDest;
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double alpha;
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if (!srcRect.isValidRect() || !clip(srcBounds, destBounds))
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return;
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if (format != src.format) {
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// When the pixel format differs, both source an dest must be
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// 2 or 4 bytes per pixel
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assert(format.bytesPerPixel == 2 || format.bytesPerPixel == 4);
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assert(src.format.bytesPerPixel == 2 || src.format.bytesPerPixel == 4);
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}
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for (int y = 0; y < srcBounds.height(); ++y) {
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const byte *srcP = (const byte *)src.getBasePtr(srcBounds.left, srcBounds.top + y);
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byte *destP = (byte *)getBasePtr(destBounds.left, destBounds.top + y);
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if (src.format == format) {
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// Matching surface formats, so we can do a straight copy
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Common::copy(srcP, srcP + srcBounds.width() * format.bytesPerPixel, destP);
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} else {
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for (int x = 0; x < srcBounds.width(); ++x,
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srcP += src.format.bytesPerPixel,
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destP += format.bytesPerPixel) {
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src.format.colorToARGB(src.format.bytesPerPixel == 2 ? *(const uint16 *)srcP : *(const uint32 *)srcP,
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aSrc, rSrc, gSrc, bSrc);
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format.colorToRGB(format.bytesPerPixel == 2 ? *(const uint16 *)destP : *(const uint32 *)destP,
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rDest, gDest, bDest);
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if (aSrc == 0) {
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// Completely transparent, so skip
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continue;
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} else if (aSrc == 0xff) {
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// Completely opaque, so copy RGB values over
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rDest = rSrc;
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gDest = gSrc;
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bDest = bSrc;
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} else {
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// Partially transparent, so calculate new pixel colors
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alpha = (double)aSrc / 255.0;
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rDest = static_cast<byte>((rSrc * alpha) + (rDest * (1.0 - alpha)));
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gDest = static_cast<byte>((gSrc * alpha) + (gDest * (1.0 - alpha)));
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bDest = static_cast<byte>((bSrc * alpha) + (bDest * (1.0 - alpha)));
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}
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destPixel = format.ARGBToColor(0xff, rDest, gDest, bDest);
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if (format.bytesPerPixel == 2)
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*(uint16 *)destP = destPixel;
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else
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*(uint32 *)destP = destPixel;
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}
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}
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}
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addDirtyRect(Common::Rect(0, 0, this->w, this->h));
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}
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void ManagedSurface::transBlitFrom(const Surface &src, uint transColor, bool flipped, uint overrideColor) {
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transBlitFrom(src, Common::Rect(0, 0, src.w, src.h), Common::Rect(0, 0, this->w, this->h),
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transColor, false, overrideColor);
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}
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void ManagedSurface::transBlitFrom(const Surface &src, const Common::Point &destPos,
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uint transColor, bool flipped, uint overrideColor) {
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transBlitFrom(src, Common::Rect(0, 0, src.w, src.h), Common::Rect(destPos.x, destPos.y,
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destPos.x + src.w, destPos.y + src.h), transColor, false, overrideColor);
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}
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void ManagedSurface::transBlitFrom(const Surface &src, const Common::Rect &srcRect,
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const Common::Point &destPos, uint transColor, bool flipped, uint overrideColor) {
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transBlitFrom(src, srcRect, Common::Rect(destPos.x, destPos.y,
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destPos.x + src.w, destPos.y + src.h), transColor, false, overrideColor);
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}
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template<typename TSRC, typename TDEST>
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void transBlit(const Surface &src, const Common::Rect &srcRect, Surface &dest, const Common::Rect &destRect, TSRC transColor, bool flipped, uint overrideColor) {
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int scaleX = SCALE_THRESHOLD * srcRect.width() / destRect.width();
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int scaleY = SCALE_THRESHOLD * srcRect.height() / destRect.height();
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const Graphics::PixelFormat &srcFormat = src.format;
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const Graphics::PixelFormat &destFormat = dest.format;
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byte aSrc, rSrc, gSrc, bSrc;
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byte rDest, gDest, bDest;
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double alpha;
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// Loop through drawing output lines
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for (int destY = destRect.top, scaleYCtr = 0; destY < destRect.bottom; ++destY, scaleYCtr += scaleY) {
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if (destY < 0 || destY >= dest.h)
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continue;
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const TSRC *srcLine = (const TSRC *)src.getBasePtr(srcRect.left, scaleYCtr / SCALE_THRESHOLD + srcRect.top);
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TDEST *destLine = (TDEST *)dest.getBasePtr(destRect.left, destY);
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// Loop through drawing the pixels of the row
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for (int destX = destRect.left, xCtr = 0, scaleXCtr = 0; destX < destRect.right; ++destX, ++xCtr, scaleXCtr += scaleX) {
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if (destX < 0 || destX >= dest.w)
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continue;
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TSRC srcVal = srcLine[flipped ? src.w - scaleXCtr / SCALE_THRESHOLD - 1 : scaleXCtr / SCALE_THRESHOLD];
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if (srcVal == transColor)
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continue;
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if (srcFormat == destFormat) {
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// Matching formats, so we can do a straight copy
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destLine[xCtr] = overrideColor ? overrideColor : srcVal;
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} else {
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// Otherwise we have to manually decode and re-encode each pixel
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srcFormat.colorToARGB(*srcLine, aSrc, rSrc, gSrc, bSrc);
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destFormat.colorToRGB(destLine[xCtr], rDest, gDest, bDest);
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if (aSrc == 0) {
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// Completely transparent, so skip
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continue;
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} else if (aSrc == 0xff) {
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// Completely opaque, so copy RGB values over
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rDest = rSrc;
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gDest = gSrc;
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bDest = bSrc;
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} else {
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// Partially transparent, so calculate new pixel colors
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alpha = (double)aSrc / 255.0;
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rDest = static_cast<byte>((rSrc * alpha) + (rDest * (1.0 - alpha)));
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gDest = static_cast<byte>((gSrc * alpha) + (gDest * (1.0 - alpha)));
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bDest = static_cast<byte>((bSrc * alpha) + (bDest * (1.0 - alpha)));
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}
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destLine[xCtr] = destFormat.ARGBToColor(0xff, rDest, gDest, bDest);
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}
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}
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}
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}
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#define HANDLE_BLIT(SRC_BYTES, DEST_BYTES, SRC_TYPE, DEST_TYPE) \
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if (src.format.bytesPerPixel == SRC_BYTES && format.bytesPerPixel == DEST_BYTES) \
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transBlit<SRC_TYPE, DEST_TYPE>(src, srcRect, _innerSurface, destRect, transColor, flipped, overrideColor); \
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else
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void ManagedSurface::transBlitFrom(const Surface &src, const Common::Rect &srcRect,
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const Common::Rect &destRect, uint transColor, bool flipped, uint overrideColor) {
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if (src.w == 0 || src.h == 0 || destRect.width() == 0 || destRect.height() == 0)
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return;
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HANDLE_BLIT(1, 1, byte, byte)
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HANDLE_BLIT(2, 2, uint16, uint16)
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HANDLE_BLIT(4, 4, uint32, uint32)
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HANDLE_BLIT(2, 4, uint16, uint32)
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HANDLE_BLIT(4, 2, uint32, uint16)
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error("Surface::transBlitFrom: bytesPerPixel must be 1, 2, or 4");
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// Mark the affected area
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addDirtyRect(destRect);
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}
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#undef HANDLE_BLIT
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void ManagedSurface::markAllDirty() {
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addDirtyRect(Common::Rect(0, 0, this->w, this->h));
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}
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void ManagedSurface::addDirtyRect(const Common::Rect &r) {
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if (_owner) {
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Common::Rect bounds = r;
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bounds.clip(Common::Rect(0, 0, this->w, this->h));
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bounds.translate(_offsetFromOwner.x, _offsetFromOwner.y);
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_owner->addDirtyRect(bounds);
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}
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}
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void ManagedSurface::clear(uint color) {
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fillRect(getBounds(), color);
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}
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} // End of namespace Graphics
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