Question

我正在为我正在制作的游戏创建一个基本的SDL + OpenGL关卡编辑器，在创建动态TTF曲面时，我遇到了一些非常严重的内存泄漏，然后将它们转换为OpenGL纹理。

例如：

每一帧，我运行一些看起来像这样的代码：

shape_label = SDL_DisplayFormat(TTF_RenderText_Solid(font, shape_names[c2].c_str(), textColor));
shape_label_gl = gl_texture(shape_label);
draw_rect(shapes[c2][0], shapes[c2][1], shape_label->w, shape_label->h, shape_label_gl, 0);
SDL_FreeSurface(shape_label);

然而，当我使用valgrind时，它表明存在大量相对较大的内存泄漏。当我监视活动监视器（Mac）中的程序时，它可以爬到近500 MB的内存使用量，并且可能会从那里继续。

这是valgrind错误：

==61330== 1,193,304 (13,816 direct, 1,179,488 indirect) bytes in 157 blocks are definitely lost in loss record 6,944 of 6,944
==61330==    at 0xB823: malloc (vg_replace_malloc.c:266)
==61330==    by 0x4D667: SDL_CreateRGBSurface (in /Library/Frameworks/SDL.framework/Versions/A/SDL)
==61330==    by 0xE84C3: TTF_RenderUNICODE_Solid (in /Library/Frameworks/SDL_ttf.framework/Versions/A/SDL_ttf)
==61330==    by 0xE836D: TTF_RenderText_Solid (in /Library/Frameworks/SDL_ttf.framework/Versions/A/SDL_ttf)
==61330==    by 0x10000A06D: SDL_main (in ./leveleditor)
==61330==    by 0x100013530: -[SDLMain applicationDidFinishLaunching:] (in ./leveleditor)
==61330==    by 0x65AD0D: __-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke_1 (in /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation)
==61330==    by 0x36C7B9: _CFXNotificationPost (in /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation)
==61330==    by 0x646FC2: -[NSNotificationCenter postNotificationName:object:userInfo:] (in /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation)
==61330==    by 0xB4C4E2: -[NSApplication _postDidFinishNotification] (in /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit)
==61330==    by 0xB4C248: -[NSApplication _sendFinishLaunchingNotification] (in /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit)
==61330==    by 0xB4AF0F: -[NSApplication(NSAppleEventHandling) _handleAEOpenEvent:] (in /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit)

如何在不使用大量内存的情况下，如何使TTF逐帧工作？

编辑：为了将来的参考，我是个白痴。我忘了这样做：

glDeleteTextures(1, &status_bottom_gl);

Answer 1

TTF_RenderText_Solid分配一个你没有释放的新表面：

SDL_Surface *ttf = TTF_RenderText_Solid(font, shape_names[c2].c_str(), textColor);
shape_label = SDL_DisplayFormat(ttf);
shape_label_gl = gl_texture(shape_label);
draw_rect(shapes[c2][0], shapes[c2][1], shape_label->w, shape_label->h, shape_label_gl, 0);
SDL_FreeSurface(shape_label);
SDL_FreeSurface(ttf); // Must free this as well!

请注意，为了获得最佳性能，您应该将这些曲面缓存到某处，而不是创建＆amp;每一帧都摧毁它们。

SDL TTF库内存泄漏（每帧创建和释放表面）

1 个答案: