summaryrefslogtreecommitdiff
path: root/src/resources/imagehelper.cpp
blob: 2eb374bd48ec34a9e6ffdf486c14a2bc47f9f8d1 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/*
 *  The ManaPlus Client
 *  Copyright (C) 2004-2009  The Mana World Development Team
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2013  The ManaPlus Developers
 *
 *  This file is part of The ManaPlus Client.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "resources/imagehelper.h"

#include "resources/dye.h"
#include "resources/resourcemanager.h"

#include "client.h"
#include "logger.h"
#include "main.h"

#include "resources/image.h"

#include "utils/sdlcheckutils.h"

#include <SDL_image.h>

#include "debug.h"

ImageHelper *imageHelper = nullptr;
ImageHelper *surfaceImageHelper = nullptr;

bool ImageHelper::mEnableAlpha = true;
RenderType ImageHelper::mUseOpenGL = RENDER_SOFTWARE;

Image *ImageHelper::load(SDL_RWops *const rw) const
{
    SDL_Surface *const tmpImage = loadPng(rw);
    if (!tmpImage)
    {
        logger->log("Error, image load failed: %s", IMG_GetError());
        return nullptr;
    }

    Image *const image = load(tmpImage);

    MSDL_FreeSurface(tmpImage);
    return image;
}

SDL_Surface* ImageHelper::convertTo32Bit(SDL_Surface *const tmpImage)
{
    if (!tmpImage)
        return nullptr;
    SDL_PixelFormat RGBAFormat;
    RGBAFormat.palette = nullptr;
#ifndef USE_SDL2
    RGBAFormat.colorkey = 0;
    RGBAFormat.alpha = 0;
#endif
    RGBAFormat.BitsPerPixel = 32;
    RGBAFormat.BytesPerPixel = 4;
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
    RGBAFormat.Rmask = 0xFF000000;
    RGBAFormat.Rshift = 0;
    RGBAFormat.Rloss = 0;
    RGBAFormat.Gmask = 0x00FF0000;
    RGBAFormat.Gshift = 8;
    RGBAFormat.Gloss = 0;
    RGBAFormat.Bmask = 0x0000FF00;
    RGBAFormat.Bshift = 16;
    RGBAFormat.Bloss = 0;
    RGBAFormat.Amask = 0x000000FF;
    RGBAFormat.Ashift = 24;
    RGBAFormat.Aloss = 0;
#else
    RGBAFormat.Rmask = 0x000000FF;
    RGBAFormat.Rshift = 24;
    RGBAFormat.Rloss = 0;
    RGBAFormat.Gmask = 0x0000FF00;
    RGBAFormat.Gshift = 16;
    RGBAFormat.Gloss = 0;
    RGBAFormat.Bmask = 0x00FF0000;
    RGBAFormat.Bshift = 8;
    RGBAFormat.Bloss = 0;
    RGBAFormat.Amask = 0xFF000000;
    RGBAFormat.Ashift = 0;
    RGBAFormat.Aloss = 0;
#endif
    return MSDL_ConvertSurface(tmpImage, &RGBAFormat, SDL_SWSURFACE);
}

void ImageHelper::dumpSurfaceFormat(const SDL_Surface *const image) const
{
    if (image->format)
    {
        const SDL_PixelFormat * const format = image->format;
        logger->log("Bytes per pixel: %d", format->BytesPerPixel);
#ifndef USE_SDL2
        logger->log("Alpha: %d", format->alpha);
#endif
        logger->log("Loss: %02x, %02x, %02x, %02x",
            static_cast<int>(format->Rloss), static_cast<int>(format->Gloss),
            static_cast<int>(format->Bloss), static_cast<int>(format->Aloss));
        logger->log("Shift: %02x, %02x, %02x, %02x",
            static_cast<int>(format->Rshift), static_cast<int>(format->Gshift),
            static_cast<int>(format->Bshift),
            static_cast<int>(format->Ashift));
        logger->log("Mask: %08x, %08x, %08x, %08x", format->Rmask,
            format->Gmask, format->Bmask, format->Amask);
    }
}

SDL_Surface *ImageHelper::loadPng(SDL_RWops *const rw)
{
    if (!rw)
        return nullptr;

    if (!IMG_isPNG(rw))
    {
        logger->log("Error, image is not png");
        SDL_RWclose(rw);
        return nullptr;
    }
    SDL_Surface *const tmpImage = MIMG_LoadPNG_RW(rw);
    SDL_RWclose(rw);
    return tmpImage;
}