| // Copyright 2017 The Fuchsia 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 "garnet/lib/ui/gfx/resources/host_image.h" |
| |
| #include <trace/event.h> |
| |
| #include "garnet/lib/ui/gfx/engine/session.h" |
| #include "garnet/lib/ui/gfx/resources/memory.h" |
| #include "garnet/lib/ui/gfx/util/image_formats.h" |
| #include "lib/images/cpp/images.h" |
| |
| namespace scenic_impl { |
| namespace gfx { |
| |
| const ResourceTypeInfo HostImage::kTypeInfo = { |
| ResourceType::kHostImage | ResourceType::kImage | ResourceType::kImageBase, |
| "HostImage"}; |
| |
| HostImage::HostImage(Session* session, ResourceId id, MemoryPtr memory, |
| escher::ImagePtr image, uint64_t memory_offset, |
| fuchsia::images::ImageInfo image_format) |
| : Image(session, id, HostImage::kTypeInfo), |
| memory_(std::move(memory)), |
| memory_offset_(memory_offset), |
| image_format_(image_format) { |
| image_ = std::move(image); |
| image_conversion_function_ = |
| image_formats::GetFunctionToConvertToBgra8(image_format); |
| } |
| |
| ImagePtr HostImage::New(Session* session, ResourceId id, MemoryPtr memory, |
| const fuchsia::images::ImageInfo& image_info, |
| uint64_t memory_offset, ErrorReporter* error_reporter) { |
| // No matter what the incoming format, the gpu format will be BGRA: |
| vk::Format gpu_image_pixel_format = vk::Format::eB8G8R8A8Unorm; |
| size_t pixel_alignment = images::MaxSampleAlignment(image_info.pixel_format); |
| |
| if (image_info.width <= 0) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): width must be greater than 0."; |
| return nullptr; |
| } |
| if (image_info.height <= 0) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): height must be greater than 0."; |
| return nullptr; |
| } |
| |
| auto& caps = session->engine()->escher()->device()->caps(); |
| if (image_info.width > caps.max_image_width) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): image width exceeds maximum (" |
| << image_info.width << " vs. " << caps.max_image_width << ")."; |
| return nullptr; |
| } |
| if (image_info.height > caps.max_image_height) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): image height exceeds maximum (" |
| << image_info.height << " vs. " << caps.max_image_height << ")."; |
| return nullptr; |
| } |
| |
| uint64_t width_bytes = image_info.width * images::StrideBytesPerWidthPixel( |
| image_info.pixel_format); |
| if (image_info.stride < width_bytes) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): stride too small for width"; |
| return nullptr; |
| } |
| if (image_info.stride % pixel_alignment != 0) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): stride must preserve pixel alignment."; |
| return nullptr; |
| } |
| if (image_info.tiling != fuchsia::images::Tiling::LINEAR) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): tiling must be LINEAR for images " |
| << "created using host memory."; |
| return nullptr; |
| } |
| |
| size_t image_size = images::ImageSize(image_info); |
| if (memory_offset >= memory->size()) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): the offset of the Image must be " |
| << "within the range of the Memory"; |
| return nullptr; |
| } |
| if (memory_offset + image_size > memory->size()) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): the Image must fit within the size " |
| << "of the Memory"; |
| return nullptr; |
| } |
| |
| // TODO(SCN-141): Support non-minimal strides for all formats. For now, NV12 |
| // is ok because it will have image_conversion_function_ and for formats with |
| // image_conversion_function_, the stride is really only the input data stride |
| // not the output data stride (which ends up being minimal thanks to the |
| // image_conversion_function_). |
| if (image_info.pixel_format != fuchsia::images::PixelFormat::NV12 && |
| image_info.stride != width_bytes) { |
| error_reporter->ERROR() |
| << "Image::CreateFromMemory(): the stride must be minimal (SCN-141)"; |
| return nullptr; |
| } |
| |
| auto escher_image = escher::image_utils::NewImage( |
| session->engine()->escher_image_factory(), gpu_image_pixel_format, |
| image_info.width, image_info.height); |
| |
| auto host_image = fxl::AdoptRef(new HostImage(session, id, std::move(memory), |
| std::move(escher_image), |
| memory_offset, image_info)); |
| return host_image; |
| } |
| |
| bool HostImage::UpdatePixels() { |
| TRACE_DURATION("gfx", "UpdatePixels"); |
| |
| // TODO(SCN-844): Migrate this over to using the batch gpu uploader. |
| if (session()->engine()->escher_gpu_uploader()) { |
| escher::image_utils::WritePixelsToImage( |
| session()->engine()->escher_gpu_uploader(), |
| static_cast<uint8_t*>(memory_->host_ptr()) + memory_offset_, image_, |
| image_conversion_function_); |
| return false; |
| } |
| return true; |
| } |
| |
| } // namespace gfx |
| } // namespace scenic_impl |