mirror of
https://github.com/vcmi/vcmi.git
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362 lines
8.7 KiB
C++
362 lines
8.7 KiB
C++
/*
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* SDLImage.cpp, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#include "StdInc.h"
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#include "SDLImage.h"
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#include "SDLImageLoader.h"
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#include "SDL_Extensions.h"
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#include "../render/ColorFilter.h"
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#include "../render/CBitmapHandler.h"
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#include "../render/CDefFile.h"
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#include "../render/Graphics.h"
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#include "../../lib/JsonNode.h"
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#include <SDL_surface.h>
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class SDLImageLoader;
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std::shared_ptr<IImage> IImage::createFromFile( const std::string & path )
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{
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return createFromFile(path, EImageBlitMode::ALPHA);
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}
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std::shared_ptr<IImage> IImage::createFromFile( const std::string & path, EImageBlitMode mode )
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{
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return std::shared_ptr<IImage>(new SDLImage(path, mode));
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}
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std::shared_ptr<IImage> IImage::createFromSurface( SDL_Surface * source )
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{
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return std::shared_ptr<IImage>(new SDLImage(source, EImageBlitMode::ALPHA));
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}
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IImage::IImage() = default;
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IImage::~IImage() = default;
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int IImage::width() const
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{
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return dimensions().x;
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}
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int IImage::height() const
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{
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return dimensions().y;
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}
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SDLImage::SDLImage(CDefFile * data, size_t frame, size_t group)
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: surf(nullptr),
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margins(0, 0),
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fullSize(0, 0),
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originalPalette(nullptr)
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{
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SDLImageLoader loader(this);
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data->loadFrame(frame, group, loader);
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savePalette();
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setBlitMode(EImageBlitMode::ALPHA);
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}
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SDLImage::SDLImage(SDL_Surface * from, EImageBlitMode mode)
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: surf(nullptr),
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margins(0, 0),
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fullSize(0, 0),
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originalPalette(nullptr)
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{
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surf = from;
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if (surf == nullptr)
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return;
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savePalette();
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setBlitMode(mode);
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surf->refcount++;
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fullSize.x = surf->w;
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fullSize.y = surf->h;
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}
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SDLImage::SDLImage(const JsonNode & conf, EImageBlitMode mode)
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: surf(nullptr),
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margins(0, 0),
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fullSize(0, 0),
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originalPalette(nullptr)
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{
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std::string filename = conf["file"].String();
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surf = BitmapHandler::loadBitmap(filename);
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if(surf == nullptr)
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return;
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savePalette();
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setBlitMode(mode);
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const JsonNode & jsonMargins = conf["margins"];
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margins.x = static_cast<int>(jsonMargins["left"].Integer());
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margins.y = static_cast<int>(jsonMargins["top"].Integer());
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fullSize.x = static_cast<int>(conf["width"].Integer());
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fullSize.y = static_cast<int>(conf["height"].Integer());
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if(fullSize.x == 0)
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{
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fullSize.x = margins.x + surf->w + (int)jsonMargins["right"].Integer();
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}
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if(fullSize.y == 0)
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{
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fullSize.y = margins.y + surf->h + (int)jsonMargins["bottom"].Integer();
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}
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}
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SDLImage::SDLImage(std::string filename, EImageBlitMode mode)
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: surf(nullptr),
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margins(0, 0),
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fullSize(0, 0),
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originalPalette(nullptr)
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{
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surf = BitmapHandler::loadBitmap(filename);
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if(surf == nullptr)
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{
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logGlobal->error("Error: failed to load image %s", filename);
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return;
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}
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else
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{
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savePalette();
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setBlitMode(mode);
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fullSize.x = surf->w;
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fullSize.y = surf->h;
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}
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}
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void SDLImage::draw(SDL_Surface *where, int posX, int posY, const Rect *src) const
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{
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if(!surf)
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return;
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Rect destRect(posX, posY, surf->w, surf->h);
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draw(where, &destRect, src);
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}
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void SDLImage::draw(SDL_Surface* where, const Rect * dest, const Rect* src) const
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{
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if (!surf)
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return;
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Rect sourceRect(0, 0, surf->w, surf->h);
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Point destShift(0, 0);
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if(src)
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{
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if(src->x < margins.x)
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destShift.x += margins.x - src->x;
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if(src->y < margins.y)
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destShift.y += margins.y - src->y;
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sourceRect = Rect(*src).intersect(Rect(margins.x, margins.y, surf->w, surf->h));
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sourceRect -= margins;
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}
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else
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destShift = margins;
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if(dest)
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destShift += dest->topLeft();
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uint8_t perSurfaceAlpha;
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if (SDL_GetSurfaceAlphaMod(surf, &perSurfaceAlpha) != 0)
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logGlobal->error("SDL_GetSurfaceAlphaMod faied! %s", SDL_GetError());
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if(surf->format->BitsPerPixel == 8 && perSurfaceAlpha == SDL_ALPHA_OPAQUE && blitMode == EImageBlitMode::ALPHA)
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{
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CSDL_Ext::blit8bppAlphaTo24bpp(surf, sourceRect, where, destShift);
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}
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else
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{
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CSDL_Ext::blitSurface(surf, sourceRect, where, destShift);
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}
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}
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std::shared_ptr<IImage> SDLImage::scaleFast(const Point & size) const
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{
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float scaleX = float(size.x) / width();
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float scaleY = float(size.y) / height();
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auto scaled = CSDL_Ext::scaleSurfaceFast(surf, (int)(surf->w * scaleX), (int)(surf->h * scaleY));
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if (scaled->format && scaled->format->palette) // fix color keying, because SDL loses it at this point
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CSDL_Ext::setColorKey(scaled, scaled->format->palette->colors[0]);
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else if(scaled->format && scaled->format->Amask)
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SDL_SetSurfaceBlendMode(scaled, SDL_BLENDMODE_BLEND);//just in case
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else
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CSDL_Ext::setDefaultColorKey(scaled);//just in case
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SDLImage * ret = new SDLImage(scaled, EImageBlitMode::ALPHA);
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ret->fullSize.x = (int) round((float)fullSize.x * scaleX);
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ret->fullSize.y = (int) round((float)fullSize.y * scaleY);
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ret->margins.x = (int) round((float)margins.x * scaleX);
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ret->margins.y = (int) round((float)margins.y * scaleY);
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// erase our own reference
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SDL_FreeSurface(scaled);
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return std::shared_ptr<IImage>(ret);
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}
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void SDLImage::exportBitmap(const boost::filesystem::path& path) const
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{
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SDL_SaveBMP(surf, path.string().c_str());
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}
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void SDLImage::playerColored(PlayerColor player)
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{
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graphics->blueToPlayersAdv(surf, player);
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}
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void SDLImage::setAlpha(uint8_t value)
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{
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CSDL_Ext::setAlpha (surf, value);
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if (value != 255)
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SDL_SetSurfaceBlendMode(surf, SDL_BLENDMODE_BLEND);
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}
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void SDLImage::setBlitMode(EImageBlitMode mode)
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{
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blitMode = mode;
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if (blitMode != EImageBlitMode::OPAQUE && surf->format->Amask != 0)
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SDL_SetSurfaceBlendMode(surf, SDL_BLENDMODE_BLEND);
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else
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SDL_SetSurfaceBlendMode(surf, SDL_BLENDMODE_NONE);
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}
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void SDLImage::setFlagColor(PlayerColor player)
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{
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if(player < PlayerColor::PLAYER_LIMIT || player==PlayerColor::NEUTRAL)
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CSDL_Ext::setPlayerColor(surf, player);
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}
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bool SDLImage::isTransparent(const Point & coords) const
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{
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return CSDL_Ext::isTransparent(surf, coords.x, coords.y);
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}
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Point SDLImage::dimensions() const
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{
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return fullSize;
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}
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void SDLImage::horizontalFlip()
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{
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margins.y = fullSize.y - surf->h - margins.y;
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//todo: modify in-place
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SDL_Surface * flipped = CSDL_Ext::horizontalFlip(surf);
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SDL_FreeSurface(surf);
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surf = flipped;
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}
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void SDLImage::verticalFlip()
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{
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margins.x = fullSize.x - surf->w - margins.x;
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//todo: modify in-place
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SDL_Surface * flipped = CSDL_Ext::verticalFlip(surf);
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SDL_FreeSurface(surf);
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surf = flipped;
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}
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// Keep the original palette, in order to do color switching operation
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void SDLImage::savePalette()
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{
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// For some images that don't have palette, skip this
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if(surf->format->palette == nullptr)
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return;
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if(originalPalette == nullptr)
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originalPalette = SDL_AllocPalette(DEFAULT_PALETTE_COLORS);
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SDL_SetPaletteColors(originalPalette, surf->format->palette->colors, 0, DEFAULT_PALETTE_COLORS);
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}
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void SDLImage::shiftPalette(uint32_t firstColorID, uint32_t colorsToMove, uint32_t distanceToMove)
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{
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if(surf->format->palette)
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{
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std::vector<SDL_Color> shifterColors(colorsToMove);
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for(uint32_t i=0; i<colorsToMove; ++i)
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{
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shifterColors[(i+distanceToMove)%colorsToMove] = originalPalette->colors[firstColorID + i];
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}
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CSDL_Ext::setColors(surf, shifterColors.data(), firstColorID, colorsToMove);
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}
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}
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void SDLImage::adjustPalette(const ColorFilter & shifter, size_t colorsToSkip)
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{
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if(originalPalette == nullptr)
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return;
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SDL_Palette* palette = surf->format->palette;
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// Note: here we skip first colors in the palette that are predefined in H3 images
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for(int i = colorsToSkip; i < palette->ncolors; i++)
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{
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palette->colors[i] = shifter.shiftColor(originalPalette->colors[i]);
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}
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}
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void SDLImage::resetPalette()
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{
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if(originalPalette == nullptr)
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return;
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// Always keept the original palette not changed, copy a new palette to assign to surface
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SDL_SetPaletteColors(surf->format->palette, originalPalette->colors, 0, originalPalette->ncolors);
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}
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void SDLImage::resetPalette( int colorID )
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{
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if(originalPalette == nullptr)
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return;
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// Always keept the original palette not changed, copy a new palette to assign to surface
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SDL_SetPaletteColors(surf->format->palette, originalPalette->colors + colorID, colorID, 1);
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}
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void SDLImage::setSpecialPallete(const IImage::SpecialPalette & SpecialPalette)
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{
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if(surf->format->palette)
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{
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CSDL_Ext::setColors(surf, const_cast<SDL_Color *>(SpecialPalette.data()), 1, 7);
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}
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}
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SDLImage::~SDLImage()
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{
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SDL_FreeSurface(surf);
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if(originalPalette != nullptr)
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{
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SDL_FreePalette(originalPalette);
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originalPalette = nullptr;
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}
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}
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