ManaPlus
surfaceimagehelper.cpp
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1 /*
2  * The ManaPlus Client
3  * Copyright (C) 2004-2009 The Mana World Development Team
4  * Copyright (C) 2009-2010 The Mana Developers
5  * Copyright (C) 2011-2019 The ManaPlus Developers
6  * Copyright (C) 2019-2021 Andrei Karas
7  *
8  * This file is part of The ManaPlus Client.
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program. If not, see <http://www.gnu.org/licenses/>.
22  */
23 
24 #ifdef USE_SDL2
25 
27 
28 #include "resources/image/image.h"
29 
30 #include "utils/sdlcheckutils.h"
31 
32 #include "debug.h"
33 
34 bool SurfaceImageHelper::mEnableAlphaCache = false;
35 
36 Image *SurfaceImageHelper::loadSurface(SDL_Surface *const tmpImage)
37 {
38  return _SDLload(tmpImage);
39 }
40 
41 Image *SurfaceImageHelper::createTextSurface(SDL_Surface *const tmpImage,
42  const int width A_UNUSED,
43  const int height A_UNUSED,
44  const float alpha)
45 {
46  if (!tmpImage)
47  return nullptr;
48 
49  Image *img;
50  bool hasAlpha = false;
51  uint8_t *alphaChannel = nullptr;
52  SDL_Surface *image = SDLDuplicateSurface(tmpImage);
53 
54  img = new Image(image, hasAlpha, alphaChannel);
55  img->setAlpha(alpha);
56  return img;
57 }
58 
59 SDL_Surface* SurfaceImageHelper::SDLDuplicateSurface(SDL_Surface *const
60  tmpImage)
61 {
62  if (!tmpImage || !tmpImage->format)
63  return nullptr;
64 
65  return MSDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE);
66 }
67 
68 Image *SurfaceImageHelper::_SDLload(SDL_Surface *tmpImage) const
69 {
70  if (!tmpImage)
71  return nullptr;
72 
73  SDL_Surface *image = convertTo32Bit(tmpImage);
74  return new Image(image, false, nullptr);
75 }
76 
77 int SurfaceImageHelper::combineSurface(SDL_Surface *restrict const src,
78  SDL_Rect *restrict const srcrect,
79  SDL_Surface *restrict const dst,
80  SDL_Rect *restrict const dstrect)
81 {
82  SDL_SetSurfaceBlendMode(src, SDL_BLENDMODE_BLEND);
83  SDL_BlitSurface(src, srcrect, dst, dstrect);
84  return 1;
85 }
86 
87 #endif // USE_SDL2
#define MSDL_ConvertSurface(src, fmt, flags)
Definition: debug.h:57
#define restrict
Definition: localconsts.h:165
#define A_UNUSED
Definition: localconsts.h:160