diff options
Diffstat (limited to 'src/wld/wayland-shm.c')
| -rw-r--r-- | src/wld/wayland-shm.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/src/wld/wayland-shm.c b/src/wld/wayland-shm.c new file mode 100644 index 0000000..520eb2c --- /dev/null +++ b/src/wld/wayland-shm.c @@ -0,0 +1,294 @@ +/* wld: wayland-shm.c + * + * Copyright (c) 2013, 2014 Michael Forney + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#define _GNU_SOURCE /* Required for mkostemp */ + +#include "wayland.h" +#include "wayland-private.h" +#include "wld-private.h" +#include "pixman.h" + +#include <fcntl.h> +#include <stdlib.h> +#include <string.h> +#include <sys/mman.h> +#include <unistd.h> +#include <wayland-client.h> + +struct shm_context +{ + struct wayland_context base; + struct wl_registry * registry; + struct wl_shm * wl; + struct wl_array formats; +}; + +struct shm_buffer +{ + struct buffer base; + int fd; +}; + +#define WAYLAND_IMPL_NAME shm +#include "interface/context.h" +#include "interface/buffer.h" +#include "interface/wayland.h" +IMPL(shm_context, wld_context) +IMPL(shm_buffer, wld_buffer) + +static void registry_global(void * data, struct wl_registry * registry, + uint32_t name, const char * interface, + uint32_t version); +static void registry_global_remove(void * data, struct wl_registry * registry, + uint32_t name); + +static void shm_format(void * data, struct wl_shm * wl, uint32_t format); + +const static struct wl_registry_listener registry_listener = { + .global = ®istry_global, + .global_remove = ®istry_global_remove +}; + +const static struct wl_shm_listener shm_listener = { + .format = &shm_format, +}; + +static inline uint32_t format_wld_to_shm(uint32_t format) +{ + switch (format) + { + case WLD_FORMAT_ARGB8888: + return WL_SHM_FORMAT_ARGB8888; + case WLD_FORMAT_XRGB8888: + return WL_SHM_FORMAT_XRGB8888; + default: + return 0; + } +} + +struct wayland_context * wayland_create_context(struct wl_display * display, + struct wl_event_queue * queue) +{ + struct shm_context * context; + + if (!(context = malloc(sizeof *context))) + goto error0; + + context_initialize(&context->base.base, &wld_context_impl); + context->wl = NULL; + wl_array_init(&context->formats); + + if (!(context->registry = wl_display_get_registry(display))) + { + DEBUG("Couldn't get registry\n"); + goto error1; + } + + wl_registry_add_listener(context->registry, ®istry_listener, context); + wl_proxy_set_queue((struct wl_proxy *) context->registry, queue); + + /* Wait for wl_shm global. */ + wl_display_roundtrip_queue(display, queue); + + if (!context->wl) + { + DEBUG("No wl_shm global\n"); + goto error2; + } + + wl_shm_add_listener(context->wl, &shm_listener, context); + + /* Wait for SHM formats. */ + wl_display_roundtrip_queue(display, queue); + + return &context->base; + + error2: + wl_registry_destroy(context->registry); + error1: + wl_array_release(&context->formats); + free(context); + error0: + return NULL; +} + +bool wayland_has_format(struct wld_context * base, uint32_t format) +{ + struct shm_context * context = shm_context(base); + uint32_t * supported_format; + uint32_t shm_format = format_wld_to_shm(format); + + wl_array_for_each(supported_format, &context->formats) + { + if (*supported_format == shm_format) + return true; + } + + return false; +} + +struct wld_renderer * context_create_renderer(struct wld_context * context) +{ + return wld_create_renderer(wld_pixman_context); +} + +struct buffer * context_create_buffer(struct wld_context * base, + uint32_t width, uint32_t height, + uint32_t format, uint32_t flags) +{ + struct shm_context * context = shm_context(base); + struct shm_buffer * buffer; + char name[] = "/tmp/wld-XXXXXX"; + uint32_t pitch = width * format_bytes_per_pixel(format); + size_t size = pitch * height; + int fd; + struct wl_shm_pool * pool; + struct wl_buffer * wl; + + if (!wayland_has_format(base, format)) + goto error0; + + if (!(buffer = malloc(sizeof *buffer))) + goto error0; + + fd = mkostemp(name, O_CLOEXEC); + + if (fd < 0) + goto error1; + + unlink(name); + + if (posix_fallocate(fd, 0, size) != 0) + goto error2; + + if (!(pool = wl_shm_create_pool(context->wl, fd, size))) + goto error2; + + wl = wl_shm_pool_create_buffer(pool, 0, width, height, pitch, + format_wld_to_shm(format)); + wl_shm_pool_destroy(pool); + + if (!wl) + goto error2; + + buffer_initialize(&buffer->base, &wld_buffer_impl, + width, height, format, pitch); + buffer->fd = fd; + + if (!(wayland_buffer_add_exporter(&buffer->base, wl))) + goto error3; + + return &buffer->base; + + error3: + wl_buffer_destroy(wl); + error2: + close(fd); + error1: + free(buffer); + error0: + return NULL; +} + +struct buffer * context_import_buffer(struct wld_context * context, + uint32_t type, union wld_object object, + uint32_t width, uint32_t height, + uint32_t format, uint32_t pitch) +{ + return NULL; +} + +void context_destroy(struct wld_context * base) +{ + struct shm_context * context = shm_context(base); + + wl_shm_destroy(context->wl); + wl_registry_destroy(context->registry); + wl_array_release(&context->formats); + wl_event_queue_destroy(context->base.queue); + free(context); +} + +/**** Buffer ****/ + +bool buffer_map(struct buffer * base) +{ + struct shm_buffer * buffer = shm_buffer(&base->base); + void * data; + + data = mmap(NULL, buffer->base.base.pitch * buffer->base.base.height, + PROT_READ | PROT_WRITE, MAP_SHARED, buffer->fd, 0); + + if (data == MAP_FAILED) + return false; + + buffer->base.base.map = data; + + return true; +} + +bool buffer_unmap(struct buffer * buffer) +{ + if (munmap(buffer->base.map, + buffer->base.pitch * buffer->base.height) == -1) + { + return false; + } + + buffer->base.map = NULL; + + return true; +} + +void buffer_destroy(struct buffer * base) +{ + struct shm_buffer * buffer = shm_buffer(&base->base); + + close(buffer->fd); + free(buffer); +} + +void registry_global(void * data, struct wl_registry * registry, uint32_t name, + const char * interface, uint32_t version) +{ + struct shm_context * context = data; + + if (strcmp(interface, "wl_shm") == 0) + context->wl = wl_registry_bind(registry, name, &wl_shm_interface, 1); +} + +void registry_global_remove(void * data, struct wl_registry * registry, + uint32_t name) +{ +} + +void shm_format(void * data, struct wl_shm * wl, uint32_t format) +{ + struct shm_context * context = data; + uint32_t * added_format; + + if (!(added_format = wl_array_add(&context->formats, sizeof format))) + return; + *added_format = format; +} + |