Kristian Høgsberg
16 years ago
parent
61ba898b73
commit
5503bf82c4
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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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