ManaPlus
mobileopenglscreenshothelper.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) 2011-2018 The ManaPlus Developers
6  *
7  * This file is part of The ManaPlus Client.
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program. If not, see <http://www.gnu.org/licenses/>.
21  */
22 
23 #if defined(USE_OPENGL) && !defined(ANDROID)
24 
26 
27 #include "configuration.h"
28 #include "graphicsmanager.h"
29 
30 #include "render/graphics.h"
31 
32 #include "render/opengl/mgl.h"
33 #ifdef __native_client__
35 #endif // __native_client__
36 
37 #include "debug.h"
38 
41  mFbo()
42 {
43 }
44 
46 {
47 }
48 
50 {
51  if (config.getBoolValue("usefbo"))
54  &mFbo);
55 }
56 
58 {
59  const int h = mainGraphics->mHeight;
60  const int w = mainGraphics->mWidth - (mainGraphics->mWidth % 4);
61  GLint pack = 1;
62 
63  SDL_Surface *const tmpImage = MSDL_CreateRGBSurface(
64  SDL_SWSURFACE, w, h, 32,
65  0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);
66 
67  if (tmpImage == nullptr)
68  return nullptr;
69 
70  // Grap the pixel buffer and write it to the SDL surface
71  mglGetIntegerv(GL_PACK_ALIGNMENT, &pack);
72  mglPixelStorei(GL_PACK_ALIGNMENT, 1);
73  mglReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, tmpImage->pixels);
74 
75  const size_t lineSize = 3 * w;
76  GLubyte *const buf = new GLubyte[lineSize];
77 
78  SDL_Surface *const screenshot = MSDL_CreateRGBSurface(
79  SDL_SWSURFACE, w, h, 24,
80  0xff0000, 0x00ff00, 0x0000ff, 0x000000);
81 
82  if (screenshot == nullptr)
83  {
84  MSDL_FreeSurface(tmpImage);
85  delete [] buf;
86  return nullptr;
87  }
88 
89 #ifdef USE_SDL2
90  SDL_SetSurfaceAlphaMod(tmpImage, SDL_ALPHA_OPAQUE);
91  SDL_SetSurfaceBlendMode(tmpImage, SDL_BLENDMODE_NONE);
92 #else // USE_SDL2
93 
94  // Make sure the alpha channel is not used, but copied to destination
95  SDL_SetAlpha(tmpImage, 0, SDL_ALPHA_OPAQUE);
96 #endif // USE_SDL2
97 
98  if (SDL_MUSTLOCK(screenshot))
99  SDL_LockSurface(screenshot);
100 
101  SDL_BlitSurface(tmpImage, nullptr, screenshot, nullptr);
102  MSDL_FreeSurface(tmpImage);
103 
104  // Flip the screenshot, as OpenGL has 0,0 in bottom left
105  const int h2 = h / 2;
106  for (int i = 0; i < h2; i++)
107  {
108  GLubyte *const top = static_cast<GLubyte*>(
109  screenshot->pixels) + lineSize * i;
110  GLubyte *const bot = static_cast<GLubyte*>(
111  screenshot->pixels) + lineSize * (h - 1 - i);
112 
113  memcpy(buf, top, lineSize);
114  memcpy(top, bot, lineSize);
115  memcpy(bot, buf, lineSize);
116  }
117 
118  delete [] buf;
119 
120  if (config.getBoolValue("usefbo"))
122 
123  mglPixelStorei(GL_PACK_ALIGNMENT, pack);
124 
125  if (SDL_MUSTLOCK(screenshot))
126  SDL_UnlockSurface(screenshot);
127 
128  return screenshot;
129 }
130 
131 #endif // defined(USE_OPENGL) && !defined(ANDROID)
int mWidth
Definition: graphics.h:483
#define MSDL_FreeSurface(surface)
Definition: debug.h:53
Configuration config
bool screenshot(InputEvent &event)
Definition: actions.cpp:50
const Image *restrict const top
bool getBoolValue(const std::string &key) const
static void deleteFBO(FBOInfo *const fbo)
Graphics * mainGraphics
Definition: graphics.cpp:108
int mHeight
Definition: graphics.h:484
#define mglPixelStorei(...)
Definition: mgl.hpp:106
#define mglGetIntegerv(...)
Definition: mgl.hpp:94
#define mglReadPixels(...)
Definition: mgl.hpp:108
GraphicsManager graphicsManager
static void createFBO(const int width, const int height, FBOInfo *const fbo)
#define MSDL_CreateRGBSurface(flags, w, h, d, r, g, b, a)
Definition: debug.h:54