137 lines
3.5 KiB
C++
137 lines
3.5 KiB
C++
/*
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Copyright (c) 2013 yvt
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This file is part of OpenSpades.
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OpenSpades 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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OpenSpades 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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You should have received a copy of the GNU General Public License
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along with OpenSpades. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "IBitmapCodec.h"
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#include "Debug.h"
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#include "Exception.h"
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#include "IStream.h"
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#include "Bitmap.h"
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#include <Imports/SDL.h>
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#include <string.h>
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#include <memory>
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namespace spades {
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class SdlImageReader: public IBitmapCodec {
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public:
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virtual std::string GetName() = 0;
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virtual SDL_Surface *LoadSdlImage(const std::string& data) = 0;
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virtual bool CanLoad() { return true; }
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virtual bool CanSave() { return false; }
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virtual bool CheckExtension(const std::string&) = 0;
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virtual Bitmap *Load(IStream *stream){
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SPADES_MARK_FUNCTION();
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// read all
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std::string data = stream->ReadAllBytes();
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auto deleter = [](SDL_Surface *s){SDL_FreeSurface(s);};
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// copy to buffer
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std::unique_ptr<SDL_Surface, decltype(deleter)> imgraw(LoadSdlImage(data), deleter);
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if(imgraw == nullptr) {
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SPRaise("SDL surface was not loaded.");
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}
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std::unique_ptr<SDL_Surface, decltype(deleter)> img(SDL_ConvertSurfaceFormat(imgraw.get(), SDL_PIXELFORMAT_ABGR8888, 0), deleter);
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if(img == nullptr) {
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SPRaise("SDL surface was loaded, but format conversion failed.");
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}
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const unsigned char* inPixels =
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(const unsigned char *)img->pixels;
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int width = img->w;
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int height = img->h;
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int pitch = img->pitch;
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Handle<Bitmap> bmp;
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bmp.Set(new Bitmap(width, height), false);
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try{
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unsigned char *outPixels = (unsigned char *)bmp->GetPixels();
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if(pitch == width * 4){
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// if the pitch matches the requirement of Bitmap,
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// just use it
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memcpy(outPixels, inPixels, pitch * height);
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} else {
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// convert
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for(int y = 0; y < height; y++){
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memcpy(outPixels, inPixels, width * 4);
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outPixels += width * 4;
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inPixels += pitch;
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}
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}
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return bmp.Unmanage();
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}catch(...){
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throw;
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}
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}
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virtual void Save(IStream *, Bitmap *) {
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SPADES_MARK_FUNCTION();
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SPNotImplemented();
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}
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};
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class StringSdlRWops {
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SDL_RWops *op;
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std::string str;
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public:
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StringSdlRWops(std::string s):str(s) {
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op = SDL_RWFromConstMem(str.data(), str.size());
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}
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~StringSdlRWops() {
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SDL_RWclose(op);
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}
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operator SDL_RWops *() { return op; }
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};
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class SdlImageImageReader: public SdlImageReader {
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public:
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virtual std::string GetName(){
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return "SDL_image Image Reader";
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}
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virtual SDL_Surface *LoadSdlImage(const std::string& data) {
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StringSdlRWops ops(data);
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int flags = IMG_INIT_PNG|IMG_INIT_JPG;
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int initted = IMG_Init(flags);
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if((initted & flags) != flags) {
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SPRaise("IMG_Init failed: %s", IMG_GetError());
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}
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auto *s = IMG_Load_RW(ops, 0);
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if(s == nullptr) {
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SPRaise("IMG_Load_RW failed: %s", IMG_GetError());
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}
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return s;
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}
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virtual bool CheckExtension(const std::string& fn) {
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return EndsWith(fn, ".png") || EndsWith(fn, ".jpg") || EndsWith(fn, ".tif") || EndsWith(fn, ".bmp");
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}
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} imgReader;
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}
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