1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112


gpu / command_buffer / service / shared_image / raw_draw_image_backing_factory.cc [blame]

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "gpu/command_buffer/service/shared_image/raw_draw_image_backing_factory.h"

#include "base/logging.h"
#include "gpu/command_buffer/common/shared_image_usage.h"
#include "gpu/command_buffer/service/shared_image/raw_draw_image_backing.h"

namespace gpu {
// NOTE: These are the *exact* set of usages that the client must list in order
// for the RawDraw backing to be applied. The client must explicitly opt into
// using RawDraw, and that only in the expected context of rasterizing content
// via OOP-raster into PaintOps to play back during compositing.
// NOTE: `SHARED_IMAGE_USAGE_RASTER_OVER_GLES2_ONLY` is not listed as RawDraw
// works only with OOP-raster (since it must store PaintOps for playback during
// compositing).
constexpr SharedImageUsageSet kRequiredUsage =
    SHARED_IMAGE_USAGE_DISPLAY_READ | SHARED_IMAGE_USAGE_RASTER_WRITE |
    SHARED_IMAGE_USAGE_OOP_RASTERIZATION | SHARED_IMAGE_USAGE_RAW_DRAW;

RawDrawImageBackingFactory::RawDrawImageBackingFactory()
    : SharedImageBackingFactory(kRequiredUsage) {}

RawDrawImageBackingFactory::~RawDrawImageBackingFactory() = default;

std::unique_ptr<SharedImageBacking>
RawDrawImageBackingFactory::CreateSharedImage(
    const Mailbox& mailbox,
    viz::SharedImageFormat format,
    SurfaceHandle surface_handle,
    const gfx::Size& size,
    const gfx::ColorSpace& color_space,
    GrSurfaceOrigin surface_origin,
    SkAlphaType alpha_type,
    SharedImageUsageSet usage,
    std::string debug_label,
    bool is_thread_safe) {
  DCHECK(is_thread_safe);
  auto texture = std::make_unique<RawDrawImageBacking>(
      mailbox, format, size, color_space, surface_origin, alpha_type, usage,
      std::move(debug_label));
  return texture;
}

std::unique_ptr<SharedImageBacking>
RawDrawImageBackingFactory::CreateSharedImage(
    const Mailbox& mailbox,
    viz::SharedImageFormat format,
    const gfx::Size& size,
    const gfx::ColorSpace& color_space,
    GrSurfaceOrigin surface_origin,
    SkAlphaType alpha_type,
    SharedImageUsageSet usage,
    std::string debug_label,
    bool is_thread_safe,
    base::span<const uint8_t> data) {
  NOTREACHED() << "Not supported";
}

std::unique_ptr<SharedImageBacking>
RawDrawImageBackingFactory::CreateSharedImage(
    const Mailbox& mailbox,
    viz::SharedImageFormat format,
    const gfx::Size& size,
    const gfx::ColorSpace& color_space,
    GrSurfaceOrigin surface_origin,
    SkAlphaType alpha_type,
    SharedImageUsageSet usage,
    std::string debug_label,
    gfx::GpuMemoryBufferHandle handle) {
  NOTREACHED();
}

bool RawDrawImageBackingFactory::CanUseRawDrawImageBacking(
    SharedImageUsageSet usage,
    GrContextType gr_context_type) const {
  return usage == kRequiredUsage;
}

bool RawDrawImageBackingFactory::IsSupported(
    SharedImageUsageSet usage,
    viz::SharedImageFormat format,
    const gfx::Size& size,
    bool thread_safe,
    gfx::GpuMemoryBufferType gmb_type,
    GrContextType gr_context_type,
    base::span<const uint8_t> pixel_data) {
  if (format.is_multi_plane()) {
    return false;
  }
  if (!CanUseRawDrawImageBacking(usage, gr_context_type)) {
    return false;
  }

  if (!pixel_data.empty()) {
    return false;
  }

  if (gmb_type != gfx::EMPTY_BUFFER) {
    return false;
  }

  return true;
}

SharedImageBackingType RawDrawImageBackingFactory::GetBackingType() {
  return SharedImageBackingType::kRawDraw;
}

}  // namespace gpu