parent
427524aedf
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16eb675399
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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 "wayland.h" |
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#include <GL/gl.h> |
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#include <eagle.h> |
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#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0]) |
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struct egl_compositor { |
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struct wl_compositor base; |
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EGLDisplay display; |
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EGLSurface surface; |
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EGLContext context; |
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int gem_fd; |
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}; |
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struct surface_data { |
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uint32_t handle; |
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int32_t width, height, stride; |
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GLuint texture; |
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}; |
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void 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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sd->handle = 0; |
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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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void notify_surface_destroy(struct wl_compositor *compositor, |
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struct wl_surface *surface) |
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{ |
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struct egl_compositor *ec = (struct egl_compositor *) compositor; |
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struct surface_data *sd; |
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struct drm_gem_close close_arg; |
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int ret; |
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sd = wl_surface_get_data(surface); |
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if (sd == NULL || sd->handle == 0) |
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return; |
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close_arg.handle = sd->handle; |
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ret = ioctl(ec->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 handle %d: %m\n", sd->handle); |
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} |
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glDeleteTextures(1, &sd->texture); |
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free(sd); |
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} |
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void 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, uint32_t stride) |
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{ |
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struct egl_compositor *ec = (struct egl_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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void *data; |
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uint32_t size; |
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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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if (sd->handle != 0) { |
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close_arg.handle = sd->handle; |
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ret = ioctl(ec->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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} |
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} |
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open_arg.name = name; |
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ret = ioctl(ec->gem_fd, DRM_IOCTL_GEM_OPEN, &open_arg); |
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if (ret != 0) { |
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fprintf(stderr, "failed to gem_open name %d, fd=%d: %m\n", name, ec->gem_fd); |
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return; |
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} |
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sd->handle = open_arg.handle; |
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sd->width = width; |
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sd->height = height; |
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sd->stride = stride; |
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size = sd->height * sd->stride; |
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data = malloc(size); |
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if (data == NULL) { |
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fprintf(stderr, "swap buffers malloc failed\n"); |
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return; |
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} |
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pread.handle = sd->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(ec->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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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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} |
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void 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 egl_compositor *ec = (struct egl_compositor *) compositor; |
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struct surface_data *sd; |
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GLint vertices[12] = { |
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map->x, map->y, 0.0, |
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map->x, map->y + map->height, 0.0, |
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map->x + map->width, map->y + map->height, 0.0, |
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map->x + map->width, map->y, 0.0 |
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}; |
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GLint tex_coords[8] = { |
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1, 0, |
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1, 1, |
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0, 1, |
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0, 0 |
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}; |
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GLuint indices[4] = { 0, 1, 2, 3 }; |
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/* This part is where we actually copy the buffer to screen.
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* Needs to be part of the repaint loop, not in the notify_map |
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* handler. */ |
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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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glClear(GL_COLOR_BUFFER_BIT);
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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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glBlendFunc(GL_SRC_ALPHA, 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_QUADS, 4, GL_UNSIGNED_INT, indices); |
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glFlush(); |
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eglSwapBuffers(ec->display, ec->surface); |
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} |
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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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struct wl_compositor * |
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wl_compositor_create(void) |
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{ |
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EGLConfig configs[64]; |
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EGLint major, minor, count; |
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struct egl_compositor *ec; |
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const int width = 800, height = 600; |
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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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ec->base.interface = &interface; |
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ec->display = eglCreateDisplay(gem_device, "i965"); |
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if (ec->display == NULL) { |
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fprintf(stderr, "failed to create display\n"); |
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return NULL; |
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} |
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if (!eglInitialize(ec->display, &major, &minor)) { |
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fprintf(stderr, "failed to initialize display\n"); |
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return NULL; |
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} |
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if (!eglGetConfigs(ec->display, configs, ARRAY_LENGTH(configs), &count)) { |
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fprintf(stderr, "failed to get configs\n"); |
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return NULL; |
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} |
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ec->surface = eglCreateSurface(ec->display, configs[24], 0, 0, width, height); |
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if (ec->surface == NULL) { |
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fprintf(stderr, "failed to create surface\n"); |
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return NULL; |
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} |
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ec->context = eglCreateContext(ec->display, configs[24], NULL, NULL); |
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if (ec->context == NULL) { |
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fprintf(stderr, "failed to create context\n"); |
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return NULL; |
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} |
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if (!eglMakeCurrent(ec->display, ec->surface, ec->surface, ec->context)) { |
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fprintf(stderr, "failed to make context current\n"); |
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return NULL; |
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} |
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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, 0.1, 0.3, 0.0); |
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ec->gem_fd = open(gem_device, O_RDWR); |
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if (ec->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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return &ec->base; |
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} |
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