关于C#：SDL2-从表面创建纹理时出现问题(屏幕截图)

SDL2 - Problems creating texture from surface (Screenshot)

下面的代码在我的Macbook上运行良好，但是在Linux上运行时会出现段错误：

gdb说它正在这里发生(第81行)：

1	mBackgroundTexture = SDL_CreateTextureFromSurface(mSDLRenderer, saveSurface);

GDB输出：

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Thread 1"Testapp.bin" received signal SIGSEGV, Segmentation fault.
_int_malloc (av=av@entry=0x7ffff6b9fb20 <main_arena>, bytes=bytes@entry=147479) at malloc.c:3728
3728 malloc.c: No such file or directory.
(gdb) bt
#0 _int_malloc (av=av@entry=0x7ffff6b9fb20 <main_arena>, bytes=bytes@entry=147479) at malloc.c:3728
#1 0x00007ffff685f5a4 in __GI___libc_malloc (bytes=147479) at malloc.c:2914
#2 0x00007fffedb126a9 in ?? () from /usr/lib/nvidia-367/libGLX_nvidia.so.0
#3 0x00007fffecb1eaf7 in ?? () from /usr/lib/nvidia-367/libnvidia-glcore.so.367.57
#4 0x00007fffecb0c30d in ?? () from /usr/lib/nvidia-367/libnvidia-glcore.so.367.57
#5 0x00007fffecbe40c4 in ?? () from /usr/lib/nvidia-367/libnvidia-glcore.so.367.57
#6 0x00007fffecbe5a0b in ?? () from /usr/lib/nvidia-367/libnvidia-glcore.so.367.57
#7 0x00007fffec871799 in ?? () from /usr/lib/nvidia-367/libnvidia-glcore.so.367.57
#8 0x00007fffec87b64c in ?? () from /usr/lib/nvidia-367/libnvidia-glcore.so.367.57
#9 0x00007fffec87f6b1 in ?? () from /usr/lib/nvidia-367/libnvidia-glcore.so.367.57
#10 0x00007fffec899127 in ?? () from /usr/lib/nvidia-367/libnvidia-glcore.so.367.57
#11 0x00007ffff7b22850 in ?? () from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#12 0x00007ffff7b1bbeb in ?? () from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#13 0x00007ffff7b1bf0b in ?? () from /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
#14 0x000000000043110a in MinimapRenderer::createBGTexture (this=0xc4f300, viewport=...)
at renderers/MinimapRenderer.cpp:81

代码：

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void MinimapRenderer::createBGTexture(const Viewport &viewport)
{
SDL_Surface *sshot = SDL_CreateRGBSurface(0, viewport.getRect().w, viewport.getRect().h, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);

if (sshot != NULL)
{
if (SDL_RenderReadPixels(mSDLRenderer, NULL, SDL_PIXELFORMAT_ARGB8888, sshot->pixels, sshot->pitch) == 0)
{
SDL_Surface *saveSurface = SDL_CreateRGBSurfaceFrom(sshot->pixels, viewport.getRect().w, viewport.getRect().h, 32, sshot->pitch, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);
if (saveSurface != NULL)
{
mBackgroundTexture = SDL_CreateTextureFromSurface(mSDLRenderer, saveSurface);
if (mBackgroundTexture != NULL)
{
SDL_SaveBMP(saveSurface,"winning.bmp");
}
else
{
SDL_Log("MinimapRenderer::createBGTexture -- SDL_CreateTextureFromSurface error: %s \
", SDL_GetError());
}

SDL_FreeSurface(saveSurface);
}
else
{
SDL_Log("MinimapRenderer::createBGTexture -- SDL_CreateRGBSurfaceFrom error: %s \
", SDL_GetError());
}
}
else
{
SDL_Log("MinimapRenderer::createBGTexture -- SDL_RenderReadPixels error: %s \
", SDL_GetError());
}

SDL_FreeSurface(sshot);
}
else
{
SDL_Log("MinimapRenderer::createBGTexture -- SDL_CreateRGBSurface error: %s \
", SDL_GetError());
}
}

赞赏进一步调试的任何想法，请让我知道是否有其他我可以提供的有用信息

我能够跟踪问题SDL_RenderReadPixels，而不是传递NULL rect而不是传递rect似乎已经解决了问题。简化版本的代码可以在不进行错误检查的情况下运行，希望它可以对某人有所帮助：

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SDL_Rect rendRect = { 0, 0, viewport.getRect().w, viewport.getRect().h };
SDL_Surface *sshot = SDL_CreateRGBSurface(0, viewport.getRect().w, viewport.getRect().h, 32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000);
SDL_RenderReadPixels(mSDLRenderer, &rendRect, SDL_PIXELFORMAT_ARGB8888, sshot->pixels, sshot->pitch);
mBackgroundTexture = SDL_CreateTextureFromSurface(mSDLRenderer, sshot);
SDL_SaveBMP(sshot,"screenshot.bmp");
SDL_FreeSurface(sshot);