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Merge pull request #8695 from jherico/texture_transfer_crash

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Fix crash in initializing texture transfer thread
This commit is contained in:
Brad Hefta-Gaub 2016-10-01 11:31:37 -07:00 committed by GitHub
commit 769a29332c
2 changed files with 24 additions and 1 deletions
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13
libraries/gpu-gl/src/gpu/gl/GLTextureTransfer.cpp
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@ -18,7 +18,6 @@
std::unordered_map<TexturePointer, nvtxRangeId_t> _map;
#endif
//#define TEXTURE_TRANSFER_PBOS
#ifdef TEXTURE_TRANSFER_PBOS
#define TEXTURE_TRANSFER_BLOCK_SIZE (64 * 1024)
@ -62,11 +61,16 @@ void GLTextureTransferHelper::transferTexture(const gpu::TexturePointer& texture
void GLTextureTransferHelper::setup() {
#ifdef THREADED_TEXTURE_TRANSFER
_context.makeCurrent();
#ifdef TEXTURE_TRANSFER_FORCE_DRAW
// FIXME don't use opengl 4.5 DSA functionality without verifying it's present
glCreateRenderbuffers(1, &_drawRenderbuffer);
glNamedRenderbufferStorage(_drawRenderbuffer, GL_RGBA8, 128, 128);
glCreateFramebuffers(1, &_drawFramebuffer);
glNamedFramebufferRenderbuffer(_drawFramebuffer, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, _drawRenderbuffer);
glCreateFramebuffers(1, &_readFramebuffer);
#endif
#ifdef TEXTURE_TRANSFER_PBOS
std::array<GLuint, TEXTURE_TRANSFER_PBO_COUNT> pbos;
glCreateBuffers(TEXTURE_TRANSFER_PBO_COUNT, &pbos[0]);
@ -84,7 +88,9 @@ void GLTextureTransferHelper::setup() {
void GLTextureTransferHelper::shutdown() {
#ifdef THREADED_TEXTURE_TRANSFER
_context.makeCurrent();
#endif
#ifdef TEXTURE_TRANSFER_FORCE_DRAW
glNamedFramebufferRenderbuffer(_drawFramebuffer, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, 0);
glDeleteFramebuffers(1, &_drawFramebuffer);
_drawFramebuffer = 0;
@ -165,6 +171,11 @@ bool GLTextureTransferHelper::process() {
}
gltexture->finishTransfer();
#ifdef TEXTURE_TRANSFER_FORCE_DRAW
// FIXME force a draw on the texture transfer thread before passing the texture to the main thread for use
#endif
#ifdef THREADED_TEXTURE_TRANSFER
clientWait();
#endif

12
libraries/gpu-gl/src/gpu/gl/GLTextureTransfer.h
View file

@ -21,6 +21,14 @@
#define THREADED_TEXTURE_TRANSFER
#endif
#ifdef THREADED_TEXTURE_TRANSFER
// FIXME when sparse textures are enabled, it's harder to force a draw on the transfer thread
// also, the current draw code is implicitly using OpenGL 4.5 functionality
//#define TEXTURE_TRANSFER_FORCE_DRAW
// FIXME PBO's increase the complexity and don't seem to work reliably
//#define TEXTURE_TRANSFER_PBOS
#endif
namespace gpu { namespace gl {
using TextureList = std::list<TexturePointer>;
@ -43,11 +51,15 @@ public:
private:
#ifdef THREADED_TEXTURE_TRANSFER
::gl::OffscreenContext _context;
#endif
#ifdef TEXTURE_TRANSFER_FORCE_DRAW
// Framebuffers / renderbuffers for forcing access to the texture on the transfer thread
GLuint _drawRenderbuffer { 0 };
GLuint _drawFramebuffer { 0 };
GLuint _readFramebuffer { 0 };
#endif
// A mutex for protecting items access on the render and transfer threads
Mutex _mutex;
// Commands that have been submitted for execution on the texture transfer thread