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https://gitlab.freedesktop.org/wayland/wayland.git
synced 2025-11-03 09:01:42 -05:00
dlopen the compositor, add a glx compositor.
This commit is contained in:
Kristian Høgsberg
parent
61ba898b73
commit
5503bf82c4
5 changed files with 395 additions and 32 deletions
307
glx-compositor.c
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307
glx-compositor.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 <stdint.h>
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#include <i915_drm.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <linux/fb.h>
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#include <X11/Xlib.h>
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#include <X11/keysym.h>
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#include <GL/gl.h>
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#include <GL/glx.h>
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#include "wayland.h"
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#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
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struct glx_compositor {
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struct wl_compositor base;
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Display *display;
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GLXContext context;
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Window window;
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struct wl_display *wl_display;
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int gem_fd;
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struct wl_event_source *x_source;
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};
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struct surface_data {
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GLuint texture;
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struct wl_map map;
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};
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static void
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repaint(void *data)
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{
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struct glx_compositor *gc = data;
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struct wl_surface_iterator *iterator;
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struct wl_surface *surface;
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struct surface_data *sd;
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GLint vertices[12];
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GLint tex_coords[12] = { 0, 0, 0, 1, 1, 0, 1, 1 };
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GLuint indices[4] = { 0, 1, 2, 3 };
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iterator = wl_surface_iterator_create(gc->wl_display, 0);
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while (wl_surface_iterator_next(iterator, &surface)) {
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sd = wl_surface_get_data(surface);
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if (sd == NULL)
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continue;
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vertices[0] = sd->map.x;
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vertices[1] = sd->map.y;
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vertices[2] = 0;
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vertices[3] = sd->map.x;
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vertices[4] = sd->map.y + sd->map.height;
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vertices[5] = 0;
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vertices[6] = sd->map.x + sd->map.width;
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vertices[7] = sd->map.y;
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vertices[8] = 0;
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vertices[9] = sd->map.x + sd->map.width;
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vertices[10] = sd->map.y + sd->map.height;
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vertices[11] = 0;
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glBindTexture(GL_TEXTURE_2D, sd->texture);
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glEnable(GL_TEXTURE_2D);
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glEnable(GL_BLEND);
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/* Assume pre-multiplied alpha for now, this probably
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* needs to be a wayland visual type of thing. */
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glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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glVertexPointer(3, GL_INT, 0, vertices);
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glTexCoordPointer(2, GL_INT, 0, tex_coords);
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glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_INT, indices);
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}
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wl_surface_iterator_destroy(iterator);
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glXSwapBuffers(gc->display, gc->window);
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}
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static void
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schedule_repaint(struct glx_compositor *gc)
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{
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struct wl_event_loop *loop;
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loop = wl_display_get_event_loop(gc->wl_display);
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wl_event_loop_add_idle(loop, repaint, gc);
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}
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static void
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notify_surface_create(struct wl_compositor *compositor,
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struct wl_surface *surface)
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{
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struct surface_data *sd;
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sd = malloc(sizeof *sd);
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if (sd == NULL)
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return;
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wl_surface_set_data(surface, sd);
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glGenTextures(1, &sd->texture);
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}
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static void
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notify_surface_destroy(struct wl_compositor *compositor,
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struct wl_surface *surface)
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{
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struct glx_compositor *gc = (struct glx_compositor *) compositor;
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struct surface_data *sd;
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sd = wl_surface_get_data(surface);
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if (sd == NULL)
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return;
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glDeleteTextures(1, &sd->texture);
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free(sd);
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schedule_repaint(gc);
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}
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static void
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notify_surface_attach(struct wl_compositor *compositor,
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struct wl_surface *surface, uint32_t name,
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uint32_t width, uint32_t height,
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uint32_t stride)
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{
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struct glx_compositor *gc = (struct glx_compositor *) compositor;
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struct surface_data *sd;
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struct drm_gem_open open_arg;
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struct drm_gem_close close_arg;
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struct drm_i915_gem_pread pread;
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uint32_t size;
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void *data;
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int ret;
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sd = wl_surface_get_data(surface);
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if (sd == NULL)
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return;
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open_arg.name = name;
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ret = ioctl(gc->gem_fd, DRM_IOCTL_GEM_OPEN, &open_arg);
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if (ret != 0) {
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fprintf(stderr,
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"failed to gem_open name %d, fd=%d: %m\n",
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name, gc->gem_fd);
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return;
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}
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size = height * stride;
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data = malloc(size);
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if (data == NULL) {
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fprintf(stderr, "malloc for gem_pread failed\n");
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return;
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}
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pread.handle = open_arg.handle;
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pread.pad = 0;
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pread.offset = 0;
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pread.size = size;
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pread.data_ptr = (long) data;
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if (ioctl(gc->gem_fd, DRM_IOCTL_I915_GEM_PREAD, &pread)) {
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fprintf(stderr, "gem_pread failed");
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return;
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}
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close_arg.handle = open_arg.handle;
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ret = ioctl(gc->gem_fd, DRM_IOCTL_GEM_CLOSE, &close_arg);
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if (ret != 0) {
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fprintf(stderr, "failed to gem_close name %d: %m\n", name);
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return;
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}
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glBindTexture(GL_TEXTURE_2D, sd->texture);
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glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
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GL_BGRA, GL_UNSIGNED_BYTE, data);
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free(data);
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schedule_repaint(gc);
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}
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static void
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notify_surface_map(struct wl_compositor *compositor,
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struct wl_surface *surface, struct wl_map *map)
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{
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struct glx_compositor *gc = (struct glx_compositor *) compositor;
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struct surface_data *sd;
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sd = wl_surface_get_data(surface);
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if (sd == NULL)
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return;
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sd->map = *map;
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schedule_repaint(gc);
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}
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static const struct wl_compositor_interface interface = {
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notify_surface_create,
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notify_surface_destroy,
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notify_surface_attach,
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notify_surface_map
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};
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static const char gem_device[] = "/dev/dri/card0";
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static void
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display_data(int fd, uint32_t mask, void *data)
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{
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struct glx_compositor *gc = data;
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XEvent ev;
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while (XPending(gc->display) > 0) {
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XNextEvent(gc->display, &ev);
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/* Some day we'll do something useful with these events. */
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}
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}
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struct wl_compositor *
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wl_compositor_create(struct wl_display *display)
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{
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static int attribs[] = {
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GLX_RGBA,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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GLX_BLUE_SIZE, 1,
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GLX_DOUBLEBUFFER,
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GLX_DEPTH_SIZE, 1,
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None
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};
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struct glx_compositor *gc;
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const int x = 100, y = 100, width = 1024, height = 768;
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XSetWindowAttributes attr;
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unsigned long mask;
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Window root;
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XVisualInfo *visinfo;
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int screen;
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struct wl_event_loop *loop;
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gc = malloc(sizeof *gc);
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if (gc == NULL)
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return NULL;
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gc->base.interface = &interface;
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gc->wl_display = display;
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gc->display = XOpenDisplay(NULL);
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if (gc->display == NULL) {
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free(gc);
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return NULL;
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}
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loop = wl_display_get_event_loop(gc->wl_display);
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gc->x_source = wl_event_loop_add_fd(loop,
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ConnectionNumber(gc->display),
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WL_EVENT_READABLE,
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display_data, gc);
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screen = DefaultScreen(gc->display);
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root = RootWindow(gc->display, screen);
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visinfo = glXChooseVisual(gc->display, screen, attribs);
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/* window attributes */
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attr.background_pixel = 0;
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attr.border_pixel = 0;
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attr.colormap = XCreateColormap(gc->display,
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root, visinfo->visual, AllocNone);
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attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
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mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
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gc->window = XCreateWindow(gc->display, root, x, y, width, height,
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0, visinfo->depth, InputOutput,
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visinfo->visual, mask, &attr);
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gc->context = glXCreateContext(gc->display, visinfo, NULL, True);
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XMapWindow(gc->display, gc->window);
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glXMakeCurrent(gc->display, gc->window, gc->context);
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glViewport(0, 0, width, height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(0, width, height, 0, 0, 1000.0);
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glMatrixMode(GL_MODELVIEW);
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glClearColor(0.0, 0.05, 0.2, 0.0);
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gc->gem_fd = open(gem_device, O_RDWR);
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if (gc->gem_fd < 0) {
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fprintf(stderr, "failed to open drm device\n");
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return NULL;
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}
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schedule_repaint(gc);
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return &gc->base;
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}
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