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382 lines
9.2 KiB
382 lines
9.2 KiB
/*
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* Copyright © 2008-2010 Kristian Høgsberg
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#define GL_GLEXT_PROTOTYPES
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#define EGL_EGLEXT_PROTOTYPES
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include "compositor.h"
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struct drm_compositor {
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struct wlsc_compositor base;
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struct udev *udev;
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struct wl_event_source *drm_source;
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struct {
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int fd;
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} drm;
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struct tty *tty;
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};
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struct drm_output {
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struct wlsc_output base;
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drmModeModeInfo mode;
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uint32_t crtc_id;
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uint32_t connector_id;
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GLuint rbo[2];
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uint32_t fb_id[2];
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EGLImageKHR image[2];
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uint32_t current;
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};
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static void
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drm_compositor_present(struct wlsc_compositor *ec)
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{
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struct drm_compositor *c = (struct drm_compositor *) ec;
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struct drm_output *output;
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wl_list_for_each(output, &ec->output_list, base.link) {
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output->current ^= 1;
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glFramebufferRenderbuffer(GL_FRAMEBUFFER,
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GL_COLOR_ATTACHMENT0,
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GL_RENDERBUFFER,
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output->rbo[output->current]);
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glFlush();
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drmModePageFlip(c->drm.fd, output->crtc_id,
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output->fb_id[output->current ^ 1],
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DRM_MODE_PAGE_FLIP_EVENT, output);
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}
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}
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static void
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page_flip_handler(int fd, unsigned int frame,
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unsigned int sec, unsigned int usec, void *data)
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{
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struct wlsc_output *output = data;
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struct wlsc_compositor *compositor = output->compositor;
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uint32_t msecs;
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msecs = sec * 1000 + usec / 1000;
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wlsc_compositor_finish_frame(compositor, msecs);
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}
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static void
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on_drm_input(int fd, uint32_t mask, void *data)
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{
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drmEventContext evctx;
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memset(&evctx, 0, sizeof evctx);
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evctx.version = DRM_EVENT_CONTEXT_VERSION;
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evctx.page_flip_handler = page_flip_handler;
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drmHandleEvent(fd, &evctx);
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}
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static int
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init_egl(struct drm_compositor *ec, struct udev_device *device)
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{
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EGLint major, minor;
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const char *extensions, *filename;
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int fd;
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static const EGLint context_attribs[] = {
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_NONE
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};
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filename = udev_device_get_devnode(device);
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fd = open(filename, O_RDWR);
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if (fd < 0) {
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/* Probably permissions error */
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fprintf(stderr, "couldn't open %s, skipping\n",
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udev_device_get_devnode(device));
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return -1;
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}
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ec->drm.fd = fd;
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ec->base.display = eglGetDRMDisplayMESA(ec->drm.fd);
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if (ec->base.display == NULL) {
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fprintf(stderr, "failed to create display\n");
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return -1;
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}
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if (!eglInitialize(ec->base.display, &major, &minor)) {
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fprintf(stderr, "failed to initialize display\n");
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return -1;
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}
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extensions = eglQueryString(ec->base.display, EGL_EXTENSIONS);
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if (!strstr(extensions, "EGL_KHR_surfaceless_opengl")) {
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fprintf(stderr, "EGL_KHR_surfaceless_opengl not available\n");
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return -1;
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}
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if (!eglBindAPI(EGL_OPENGL_ES_API)) {
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fprintf(stderr, "failed to bind api EGL_OPENGL_ES_API\n");
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return -1;
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}
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ec->base.context = eglCreateContext(ec->base.display, NULL,
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EGL_NO_CONTEXT, context_attribs);
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if (ec->base.context == NULL) {
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fprintf(stderr, "failed to create context\n");
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return -1;
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}
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if (!eglMakeCurrent(ec->base.display, EGL_NO_SURFACE,
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EGL_NO_SURFACE, ec->base.context)) {
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fprintf(stderr, "failed to make context current\n");
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return -1;
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}
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return 0;
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}
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static drmModeModeInfo builtin_1024x768 = {
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63500, /* clock */
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1024, 1072, 1176, 1328, 0,
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768, 771, 775, 798, 0,
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59920,
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DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
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0,
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"1024x768"
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};
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static int
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create_output_for_connector(struct drm_compositor *ec,
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drmModeRes *resources,
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drmModeConnector *connector)
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{
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struct drm_output *output;
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drmModeEncoder *encoder;
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drmModeModeInfo *mode;
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int i, ret;
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EGLint handle, stride, attribs[] = {
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EGL_WIDTH, 0,
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EGL_HEIGHT, 0,
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EGL_DRM_BUFFER_FORMAT_MESA, EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
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EGL_DRM_BUFFER_USE_MESA, EGL_DRM_BUFFER_USE_SCANOUT_MESA,
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EGL_NONE
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};
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output = malloc(sizeof *output);
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if (output == NULL)
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return -1;
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if (connector->count_modes > 0)
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mode = &connector->modes[0];
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else
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mode = &builtin_1024x768;
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encoder = drmModeGetEncoder(ec->drm.fd, connector->encoders[0]);
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if (encoder == NULL) {
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fprintf(stderr, "No encoder for connector.\n");
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return -1;
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}
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for (i = 0; i < resources->count_crtcs; i++) {
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if (encoder->possible_crtcs & (1 << i))
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break;
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}
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if (i == resources->count_crtcs) {
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fprintf(stderr, "No usable crtc for encoder.\n");
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return -1;
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}
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memset(output, 0, sizeof *output);
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wlsc_output_init(&output->base, &ec->base, 0, 0,
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mode->hdisplay, mode->vdisplay, 0);
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output->crtc_id = resources->crtcs[i];
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output->connector_id = connector->connector_id;
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output->mode = *mode;
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drmModeFreeEncoder(encoder);
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glGenRenderbuffers(2, output->rbo);
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for (i = 0; i < 2; i++) {
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glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
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attribs[1] = output->base.width;
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attribs[3] = output->base.height;
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output->image[i] =
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eglCreateDRMImageMESA(ec->base.display, attribs);
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glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER,
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output->image[i]);
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eglExportDRMImageMESA(ec->base.display, output->image[i],
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NULL, &handle, &stride);
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ret = drmModeAddFB(ec->drm.fd,
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output->base.width, output->base.height,
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32, 32, stride, handle, &output->fb_id[i]);
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if (ret) {
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fprintf(stderr, "failed to add fb %d: %m\n", i);
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return -1;
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}
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}
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output->current = 0;
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glFramebufferRenderbuffer(GL_FRAMEBUFFER,
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GL_COLOR_ATTACHMENT0,
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GL_RENDERBUFFER,
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output->rbo[output->current]);
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ret = drmModeSetCrtc(ec->drm.fd, output->crtc_id,
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output->fb_id[output->current ^ 1], 0, 0,
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&output->connector_id, 1, &output->mode);
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if (ret) {
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fprintf(stderr, "failed to set mode: %m\n");
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return -1;
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}
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wl_list_insert(ec->base.output_list.prev, &output->base.link);
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return 0;
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}
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static int
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create_outputs(struct drm_compositor *ec, int option_connector)
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{
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drmModeConnector *connector;
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drmModeRes *resources;
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int i;
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resources = drmModeGetResources(ec->drm.fd);
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if (!resources) {
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fprintf(stderr, "drmModeGetResources failed\n");
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return -1;
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}
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for (i = 0; i < resources->count_connectors; i++) {
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connector = drmModeGetConnector(ec->drm.fd, resources->connectors[i]);
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if (connector == NULL)
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continue;
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if (connector->connection == DRM_MODE_CONNECTED &&
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(option_connector == 0 ||
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connector->connector_id == option_connector))
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if (create_output_for_connector(ec, resources, connector) < 0)
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return -1;
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drmModeFreeConnector(connector);
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}
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if (wl_list_empty(&ec->base.output_list)) {
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fprintf(stderr, "No currently active connector found.\n");
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return -1;
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}
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drmModeFreeResources(resources);
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return 0;
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}
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static void
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drm_destroy(struct wlsc_compositor *ec)
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{
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struct drm_compositor *d = (struct drm_compositor *) ec;
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tty_destroy(d->tty);
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free(d);
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}
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struct wlsc_compositor *
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drm_compositor_create(struct wl_display *display, int connector)
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{
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struct drm_compositor *ec;
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struct udev_enumerate *e;
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struct udev_list_entry *entry;
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struct udev_device *device;
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const char *path;
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struct wl_event_loop *loop;
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ec = malloc(sizeof *ec);
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if (ec == NULL)
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return NULL;
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memset(ec, 0, sizeof *ec);
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ec->udev = udev_new();
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if (ec->udev == NULL) {
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fprintf(stderr, "failed to initialize udev context\n");
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return NULL;
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}
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e = udev_enumerate_new(ec->udev);
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udev_enumerate_add_match_subsystem(e, "drm");
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udev_enumerate_add_match_property(e, "WAYLAND_SEAT", "1");
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udev_enumerate_scan_devices(e);
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device = NULL;
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udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
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path = udev_list_entry_get_name(entry);
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device = udev_device_new_from_syspath(ec->udev, path);
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break;
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}
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udev_enumerate_unref(e);
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if (device == NULL) {
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fprintf(stderr, "no drm device found\n");
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return NULL;
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}
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ec->base.wl_display = display;
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if (init_egl(ec, device) < 0) {
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fprintf(stderr, "failed to initialize egl\n");
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return NULL;
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}
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ec->base.destroy = drm_destroy;
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ec->base.present = drm_compositor_present;
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ec->base.create_buffer = wlsc_shm_buffer_create;
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ec->base.focus = 1;
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glGenFramebuffers(1, &ec->base.fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, ec->base.fbo);
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/* Can't init base class until we have a current egl context */
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if (wlsc_compositor_init(&ec->base, display) < 0)
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return NULL;
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if (create_outputs(ec, connector) < 0) {
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fprintf(stderr, "failed to create output for %s\n", path);
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return NULL;
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}
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evdev_input_add_devices(&ec->base, ec->udev);
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loop = wl_display_get_event_loop(ec->base.wl_display);
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ec->drm_source =
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wl_event_loop_add_fd(loop, ec->drm.fd,
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WL_EVENT_READABLE, on_drm_input, ec);
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ec->tty = tty_create(&ec->base);
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return &ec->base;
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}
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