diff options
Diffstat (limited to 'drmtools-egl.c')
| -rw-r--r-- | drmtools-egl.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/drmtools-egl.c b/drmtools-egl.c new file mode 100644 index 0000000..10cc715 --- /dev/null +++ b/drmtools-egl.c @@ -0,0 +1,165 @@ +#include <stdio.h> +#include <stdlib.h> +#include <stdbool.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#include <string.h> +#include <inttypes.h> +#include <getopt.h> + +#include <sys/ioctl.h> +#include <sys/mman.h> + +#include <gbm.h> +#include <epoxy/gl.h> +#include <epoxy/egl.h> + +#include <xf86drm.h> +#include <xf86drmMode.h> + +#include <cairo.h> +#include <pixman.h> + +#include "drmtools.h" + +/* ------------------------------------------------------------------ */ + +static struct gbm_device *gbm_dev; +static struct gbm_surface *gbm_surface; +static EGLDisplay dpy; +static EGLConfig cfg; +static EGLContext ctx; +static EGLSurface surface; + +/* ------------------------------------------------------------------ */ + +int drm_setup_egl(void) +{ + static const EGLint conf_att[] = { + EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, + EGL_SURFACE_TYPE, EGL_WINDOW_BIT, + EGL_RED_SIZE, 5, + EGL_GREEN_SIZE, 5, + EGL_BLUE_SIZE, 5, + EGL_ALPHA_SIZE, 0, + EGL_NONE, + }; + static const EGLint ctx_att[] = { + EGL_NONE + }; + EGLint major, minor; + EGLBoolean b; + EGLint n; + + gbm_dev = gbm_create_device(drm_fd); + if (!gbm_dev) { + fprintf(stderr, "egl: gbm_create_device failed\n"); + return -1; + } + + gbm_surface = gbm_surface_create(gbm_dev, + drm_mode->hdisplay, + drm_mode->vdisplay, + GBM_FORMAT_XRGB8888, + GBM_BO_USE_RENDERING); + if (!gbm_surface) { + fprintf(stderr, "egl: gbm_create_surface failed\n"); + return -1; + } + +#ifdef EGL_MESA_platform_gbm + dpy = eglGetPlatformDisplayEXT(EGL_PLATFORM_GBM_MESA, gbm_dev, NULL); +#else + dpy = eglGetDisplay(gbm_dev); +#endif + if (dpy == EGL_NO_DISPLAY) { + fprintf(stderr, "egl: eglGetDisplay failed\n"); + return -1; + } + + b = eglInitialize(dpy, &major, &minor); + if (b == EGL_FALSE) { + fprintf(stderr, "egl: eglInitialize failed\n"); + return -1; + } + + b = eglBindAPI(EGL_OPENGL_API); + if (b == EGL_FALSE) { + fprintf(stderr, "egl: eglBindAPI failed\n"); + return -1; + } + + b = eglChooseConfig(dpy, conf_att, &cfg, 1, &n); + if (b == EGL_FALSE || n != 1) { + fprintf(stderr, "egl: eglChooseConfig failed\n"); + return -1; + } + + ctx = eglCreateContext(dpy, cfg, EGL_NO_CONTEXT, ctx_att); + if (ctx == EGL_NO_CONTEXT) { + fprintf(stderr, "egl: eglCreateContext failed\n"); + return -1; + } + + b = eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, ctx); + if (b == EGL_FALSE) { + fprintf(stderr, "egl: eglMakeCurrent(EGL_NO_SURFACE) failed\n"); + return -1; + } + + surface = eglCreateWindowSurface(dpy, cfg, + (EGLNativeWindowType)gbm_surface, + NULL); + if (!surface) { + fprintf(stderr, "egl: eglCreateWindowSurface failed\n"); + return -1; + } + + b = eglMakeCurrent(dpy, surface, surface, ctx); + if (b == EGL_FALSE) { + fprintf(stderr, "egl: eglMakeCurrent(surface) failed\n"); + return -1; + } + return 0; +} + +static int fbid; +static struct gbm_bo *bo; + +void drm_egl_flush_display(void) +{ + uint32_t handle, stride, newfb; + struct gbm_bo *newbo; + int rc; + + eglSwapBuffers(dpy, surface); + + newbo = gbm_surface_lock_front_buffer(gbm_surface); + if (!newbo) { + fprintf(stderr, "egl: gbm_surface_lock_front_buffer failed\n"); + return; + } + handle = gbm_bo_get_handle(newbo).u32; + stride = gbm_bo_get_stride(newbo); + + drmModeAddFB(drm_fd, drm_mode->hdisplay, drm_mode->vdisplay, 24, 32, + stride, handle, &newfb); + rc = drmModeSetCrtc(drm_fd, drm_enc->crtc_id, newfb, 0, 0, + &drm_conn->connector_id, 1, + &drm_conn->modes[0]); + if (rc < 0) { + fprintf(stderr, "egl: drmModeSetCrtc() failed\n"); + return; + } + + if (fbid) { + drmModeRmFB(drm_fd, fbid); + } + fbid = newfb; + + if (bo) { + gbm_surface_release_buffer(gbm_surface, bo); + } + bo = newbo; +} |