Comments (1)
Hi @NukeBird !
Not really, it's possible to use it in a thread-safe environment but you'll have to manage the OpenGL context manually. I use SOIL2 for loading textures in multiple-threads and works just fine, but I cannot implement the thread-safe code inside SOIL2 since it completely depends on how you want to manage the OpenGL context/s.
If you want to know how to achieve that you can take a look at my implementation: here. The code is kinda complex but the basic idea is something like:
- Create a window with one shared GL context (besides your render GL context). With SDL2 this is something like:
SDL_GL_SetAttribute( SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1 );
mGLContext = SDL_GL_CreateContext( mSDLWindow );
mGLContextThread = SDL_GL_CreateContext( mSDLWindow );
- Before any
SOIL_
call you will need to ensure there's a valid GL context active in the thread you are calling theSOIL_
function, something like:
if ( std::this_thread::get_id() != myOpenGLMainThreadId ) {
// If the current thread is not the OpenGL main thread we need to activate the GL shared context in the current thread.
glContextThreadMutex.lock();
SDL_GL_MakeCurrent( mSDLWindow, mGLContextThread );
}
SOIL_load_OGL_texture(...);
if ( std::this_thread::get_id() != myOpenGLMainThreadId ) {
// Deactivate the GL shared context.
SDL_GL_MakeCurrent( mSDLWindow, NULL );
glContextThreadMutex.unlock();
}
And that's basically it. You just need to ensure that there's an active GL context in your current thread before calling any OpenGL method (and in this case any SOIL2 function). To upload any compressed texture directly to VRAM remember to use the flags for it: SOIL_FLAG_DDS_LOAD_DIRECT|SOIL_FLAG_PVR_LOAD_DIRECT|SOIL_FLAG_ETC1_LOAD_DIRECT
.
BTW, one clarification this example is to decode and load the OpenGL texture in other thread, If you want to decode first the image in a secondary thread, use SOIL_load_image
or SOIL_load_image_from_memory
, and then load the texture in the render thread using: SOIL_create_OGL_texture
or SOIL_direct_load_DDS_from_memory
(or any of the direct_load
functions available).
Regards.
from soil2.
Related Issues (20)
- HDR textures HOT 1
- Unable to compile HOT 1
- weird linking errors HOT 1
- SOIL_load_OGL_cubemap returning null type HOT 5
- How do I use SOIL2 HOT 16
- install issue macOS HOT 15
- Set GL_TEXTURE_MAX_LEVEL for DDS files with incomplete mip chain
- Add arg (Int*width and int*height) to function with XXX__OGL_XXX.
- Support uwp in vcpkg
- Unable to link static lib (Android)
- compiling SOIL2 with mingw64 gcc version 11.2.0 HOT 2
- Compiler Error VS2022 HOT 5
- lib version HOT 1
- Missing documentation HOT 1
- Cannot find source file in CMake HOT 1
- invalid strcmp
- Compiler warnings (clang) HOT 1
- SOIL2 is amazing but how without OpenGL ? HOT 2
- compiling SOIL2 with mingw64 gcc version 13.1.0 in windows 11 HOT 2
- Not usable with nanovg HOT 5
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from soil2.