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Merge pull request #4024 from BlGene/egl_device_selection

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EGL device selection by environment variable
This commit is contained in:
erwincoumans
2021-11-13 22:20:13 -08:00
committed by GitHub
parent a9a103fc8c 3c4cb80157
commit 691ad46baa
1 changed files with 24 additions and 1 deletions
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examples/OpenGLWindow/EGLOpenGLWindow.cpp
+24 -1
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@@ -33,6 +33,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <cstdlib>
#include "OpenGLInclude.h"
@@ -124,6 +125,28 @@ void EGLOpenGLWindow::createWindow(const b3gWindowConstructionInfo& ci)
{
printf("eglQueryDevicesEXT Failed.\n");
m_data->egl_display = EGL_NO_DISPLAY;
} else
{
// default case, should always happen (for future compatibility)
if (m_data->m_renderDevice == -1)
{
// check env variable
const char* env_p = std::getenv("EGL_VISIBLE_DEVICES");
// variable is set
if(env_p != NULL)
{
m_data->m_renderDevice = std::atoi(env_p);
fprintf(stderr, "EGL device choice: %d of %d (from EGL_VISIBLE_DEVICES)\n", m_data->m_renderDevice, num_devices);
} else {
fprintf(stderr, "EGL device choice: %d of %d.\n", m_data->m_renderDevice, num_devices);
} // else leave with -1
} else
{
fprintf(stderr, "EGL device choice: %d of %d.\n", m_data->m_renderDevice, num_devices);
}
}
// Query EGL Screens
if (m_data->m_renderDevice == -1)
@@ -179,7 +202,7 @@ void EGLOpenGLWindow::createWindow(const b3gWindowConstructionInfo& ci)
if (!eglInitialize(m_data->egl_display, NULL, NULL))
{
fprintf(stderr, "Unable to initialize EGL\n");
fprintf(stderr, "eglInitialize() failed with error: %x\n", eglGetError());
exit(EXIT_FAILURE);
}