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kolibrios/contrib/sdk/sources/pixlib-3/egl.c
Sergey Semyonov (Serge) 3287cff0b2 sdk: new pixlib. Now with OpenGL taste.
git-svn-id: svn://kolibrios.org@5371 a494cfbc-eb01-0410-851d-a64ba20cac60
2015-01-15 05:49:40 +00:00

117 lines
2.7 KiB
C

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <drm/i915_drm.h>
#include <kos32sys.h>
#define EGL_EGLEXT_PROTOTYPES
#define GL_GLEXT_PROTOTYPES
#include "EGL/egl.h"
#include "EGL/eglext.h"
#include "GL/gl.h"
#include "gbm.h"
#include "pxgl.h"
static struct gbm_device *gbm;
static EGLConfig choose_config(EGLDisplay *dpy)
{
EGLConfig config = NULL;
EGLint config_attribs[32];
EGLint num_configs, i;
i = 0;
config_attribs[i++] = EGL_RED_SIZE;
config_attribs[i++] = 1;
config_attribs[i++] = EGL_GREEN_SIZE;
config_attribs[i++] = 1;
config_attribs[i++] = EGL_BLUE_SIZE;
config_attribs[i++] = 1;
config_attribs[i++] = EGL_DEPTH_SIZE;
config_attribs[i++] = 1;
config_attribs[i++] = EGL_SURFACE_TYPE;
config_attribs[i++] = EGL_WINDOW_BIT;
config_attribs[i++] = EGL_RENDERABLE_TYPE;
config_attribs[i++] = EGL_OPENGL_BIT;
config_attribs[i] = EGL_NONE;
eglChooseConfig(dpy, config_attribs, &config, 1, &num_configs);
return config;
};
int egl_initialize(EGLDisplay *dpy, EGLConfig *config, EGLContext *context)
{
EGLint major, minor;
int fd;
fd = get_service("DISPLAY");
if(fd == 0)
return -1;
gbm = gbm_create_device(fd);
if( gbm == NULL)
{
DBG("failed to initialize GBM device\n");
goto err_0;
};
*dpy = eglGetDisplay(gbm);
if (!eglInitialize(*dpy, &major, &minor))
{
DBG("failed to initialize EGL display\n");
goto err_1;
};
DBG("EGL_VERSION = %s\n", eglQueryString(*dpy, EGL_VERSION));
DBG("EGL_VENDOR = %s\n", eglQueryString(*dpy, EGL_VENDOR));
DBG("EGL_EXTENSIONS = %s\n", eglQueryString(*dpy, EGL_EXTENSIONS));
DBG("EGL_CLIENT_APIS = %s\n", eglQueryString(*dpy, EGL_CLIENT_APIS));
*config = choose_config(*dpy);
if( *config == NULL)
{
DBG("failed to choose a config\n");
goto err_2;
};
eglBindAPI(EGL_OPENGL_API);
*context = eglCreateContext(*dpy, *config, EGL_NO_CONTEXT, NULL);
if (context == NULL)
{
DBG("failed to create context\n");
goto err_2;
};
if (!eglMakeCurrent(*dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, *context))
{
DBG("failed to make context current");
goto err_3;
};
return 0;
err_3:
eglDestroyContext(*dpy, *context);
err_2:
eglTerminate(*dpy);
err_1:
gbm_device_destroy(gbm);
err_0:
return -1;
};
void egl_destroy(EGLDisplay dpy, EGLContext context)
{
eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroyContext(dpy, context);
eglTerminate(dpy);
gbm_device_destroy(gbm);
};