123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144 |
- // Copyright 2019 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "components/exo/wayland/wl_shm.h"
- #include <wayland-server-protocol-core.h>
- #include "base/bind.h"
- #include "components/exo/buffer.h"
- #include "components/exo/display.h"
- #include "components/exo/shared_memory.h"
- #include "components/exo/wayland/server_util.h"
- namespace exo {
- namespace wayland {
- namespace {
- void buffer_destroy(wl_client* client, wl_resource* resource) {
- wl_resource_destroy(resource);
- }
- const struct wl_buffer_interface buffer_implementation = {buffer_destroy};
- void HandleBufferReleaseCallback(wl_resource* resource) {
- wl_buffer_send_release(resource);
- wl_client_flush(wl_resource_get_client(resource));
- }
- const struct shm_supported_format {
- uint32_t shm_format;
- gfx::BufferFormat buffer_format;
- } shm_supported_formats[] = {
- {WL_SHM_FORMAT_XBGR8888, gfx::BufferFormat::RGBX_8888},
- {WL_SHM_FORMAT_ABGR8888, gfx::BufferFormat::RGBA_8888},
- {WL_SHM_FORMAT_XRGB8888, gfx::BufferFormat::BGRX_8888},
- {WL_SHM_FORMAT_ARGB8888, gfx::BufferFormat::BGRA_8888}};
- void shm_pool_create_buffer(wl_client* client,
- wl_resource* resource,
- uint32_t id,
- int32_t offset,
- int32_t width,
- int32_t height,
- int32_t stride,
- uint32_t format) {
- const auto* supported_format =
- std::find_if(shm_supported_formats,
- shm_supported_formats + std::size(shm_supported_formats),
- [format](const shm_supported_format& supported_format) {
- return supported_format.shm_format == format;
- });
- if (supported_format ==
- (shm_supported_formats + std::size(shm_supported_formats))) {
- wl_resource_post_error(resource, WL_SHM_ERROR_INVALID_FORMAT,
- "invalid format 0x%x", format);
- return;
- }
- if (offset < 0) {
- wl_resource_post_error(resource, WL_SHM_ERROR_INVALID_FORMAT,
- "invalid offset %d", offset);
- return;
- }
- std::unique_ptr<Buffer> buffer =
- GetUserDataAs<SharedMemory>(resource)->CreateBuffer(
- gfx::Size(width, height), supported_format->buffer_format, offset,
- stride);
- if (!buffer) {
- wl_resource_post_no_memory(resource);
- return;
- }
- wl_resource* buffer_resource =
- wl_resource_create(client, &wl_buffer_interface, 1, id);
- buffer->set_release_callback(base::BindRepeating(
- &HandleBufferReleaseCallback, base::Unretained(buffer_resource)));
- SetImplementation(buffer_resource, &buffer_implementation, std::move(buffer));
- }
- void shm_pool_destroy(wl_client* client, wl_resource* resource) {
- wl_resource_destroy(resource);
- }
- void shm_pool_resize(wl_client* client, wl_resource* resource, int32_t size) {
- auto* shm = GetUserDataAs<SharedMemory>(resource);
- if (size < 0 || static_cast<size_t>(size) < shm->GetSize()) {
- wl_resource_post_error(resource, WL_SHM_ERROR_INVALID_FD,
- "Can't shrink a shm pool.");
- }
- if (!shm->Resize(size))
- wl_resource_post_no_memory(resource);
- }
- const struct wl_shm_pool_interface shm_pool_implementation = {
- shm_pool_create_buffer, shm_pool_destroy, shm_pool_resize};
- void shm_create_pool(wl_client* client,
- wl_resource* resource,
- uint32_t id,
- int fd,
- int32_t size) {
- static const auto kMode =
- base::subtle::PlatformSharedMemoryRegion::Mode::kUnsafe;
- auto fd_pair = base::subtle::ScopedFDPair(base::ScopedFD(fd),
- base::ScopedFD() /* readonly_fd */);
- auto guid = base::UnguessableToken::Create();
- auto platform_shared_memory = base::subtle::PlatformSharedMemoryRegion::Take(
- std::move(fd_pair), kMode, size, guid);
- std::unique_ptr<SharedMemory> shared_memory =
- GetUserDataAs<Display>(resource)->CreateSharedMemory(
- base::UnsafeSharedMemoryRegion::Deserialize(
- std::move(platform_shared_memory)));
- if (!shared_memory) {
- wl_resource_post_no_memory(resource);
- return;
- }
- wl_resource* shm_pool_resource =
- wl_resource_create(client, &wl_shm_pool_interface, 1, id);
- SetImplementation(shm_pool_resource, &shm_pool_implementation,
- std::move(shared_memory));
- }
- const struct wl_shm_interface shm_implementation = {shm_create_pool};
- } // namespace
- void bind_shm(wl_client* client, void* data, uint32_t version, uint32_t id) {
- wl_resource* resource = wl_resource_create(client, &wl_shm_interface, 1, id);
- wl_resource_set_implementation(resource, &shm_implementation, data, nullptr);
- for (const auto& supported_format : shm_supported_formats)
- wl_shm_send_format(resource, supported_format.shm_format);
- }
- } // namespace wayland
- } // namespace exo
|