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) 2011-2019 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 #if defined(USE_OPENGL) && !defined(ANDROID)
25 
27 
28 #include "configuration.h"
29 #include "graphicsmanager.h"
30 
31 #include "render/graphics.h"
32 
33 #include "render/opengl/mgl.h"
34 #ifdef __native_client__
36 #endif // __native_client__
37 
38 #include "debug.h"
39 
42  mFbo()
43 {
44 }
45 
47 {
48 }
49 
51 {
52  if (config.getBoolValue("usefbo"))
55  &mFbo);
56 }
57 
59 {
60  const int h = mainGraphics->mHeight;
61  const int w = mainGraphics->mWidth - (mainGraphics->mWidth % 4);
62  GLint pack = 1;
63 
64  SDL_Surface *const tmpImage = MSDL_CreateRGBSurface(
65  SDL_SWSURFACE, w, h, 32,
66  0x00ff0000U, 0x0000ff00U, 0x000000ffU, 0xff000000U);
67 
68  if (tmpImage == nullptr)
69  return nullptr;
70 
71  // Grap the pixel buffer and write it to the SDL surface
72  mglGetIntegerv(GL_PACK_ALIGNMENT, &pack);
73  mglPixelStorei(GL_PACK_ALIGNMENT, 1);
74  mglReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, tmpImage->pixels);
75 
76  const size_t lineSize = 3 * w;
77  GLubyte *const buf = new GLubyte[lineSize];
78 
79  SDL_Surface *const screenshot = MSDL_CreateRGBSurface(
80  SDL_SWSURFACE, w, h, 24,
81  0xff0000, 0x00ff00, 0x0000ff, 0x000000);
82 
83  if (screenshot == nullptr)
84  {
85  MSDL_FreeSurface(tmpImage);
86  delete [] buf;
87  return nullptr;
88  }
89 
90 #ifdef USE_SDL2
91  SDL_SetSurfaceAlphaMod(tmpImage, SDL_ALPHA_OPAQUE);
92  SDL_SetSurfaceBlendMode(tmpImage, SDL_BLENDMODE_NONE);
93 #else // USE_SDL2
94 
95  // Make sure the alpha channel is not used, but copied to destination
96  SDL_SetAlpha(tmpImage, 0, SDL_ALPHA_OPAQUE);
97 #endif // USE_SDL2
98 
99  if (SDL_MUSTLOCK(screenshot))
100  SDL_LockSurface(screenshot);
101 
102  SDL_BlitSurface(tmpImage, nullptr, screenshot, nullptr);
103  MSDL_FreeSurface(tmpImage);
104 
105  // Flip the screenshot, as OpenGL has 0,0 in bottom left
106  const int h2 = h / 2;
107  for (int i = 0; i < h2; i++)
108  {
109  GLubyte *const top = static_cast<GLubyte*>(
110  screenshot->pixels) + lineSize * i;
111  GLubyte *const bot = static_cast<GLubyte*>(
112  screenshot->pixels) + lineSize * (h - 1 - i);
113 
114  memcpy(buf, top, lineSize);
115  memcpy(top, bot, lineSize);
116  memcpy(bot, buf, lineSize);
117  }
118 
119  delete [] buf;
120 
121  if (config.getBoolValue("usefbo"))
123 
124  mglPixelStorei(GL_PACK_ALIGNMENT, pack);
125 
126  if (SDL_MUSTLOCK(screenshot))
127  SDL_UnlockSurface(screenshot);
128 
129  return screenshot;
130 }
131 
132 #endif // defined(USE_OPENGL) && !defined(ANDROID)
bool getBoolValue(const std::string &key) const
static void deleteFBO(FBOInfo *const fbo)
static void createFBO(const int width, const int height, FBOInfo *const fbo)
int mWidth
Definition: graphics.h:484
int mHeight
Definition: graphics.h:485
Configuration config
#define MSDL_CreateRGBSurface(flags, w, h, d, r, g, b, a)
Definition: debug.h:55
#define MSDL_FreeSurface(surface)
Definition: debug.h:54
Graphics * mainGraphics
Definition: graphics.cpp:109
const Image *restrict const top
GraphicsManager graphicsManager
#define mglReadPixels(...)
Definition: mgl.hpp:109
#define mglGetIntegerv(...)
Definition: mgl.hpp:95
#define mglPixelStorei(...)
Definition: mgl.hpp:107
bool screenshot(InputEvent &event)
Definition: actions.cpp:51