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