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// Copyright 2014 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 "ui/ozone/platform/drm/gpu/gbm_buffer.h"
#include <drm.h>
#include <fcntl.h>
#include <gbm.h>
#include <xf86drm.h>
#include "base/logging.h"
#include "base/posix/eintr_wrapper.h"
#include "base/trace_event/trace_event.h"
#include "ui/gfx/geometry/size_conversions.h"
#include "ui/gfx/native_pixmap_handle_ozone.h"
#include "ui/ozone/platform/drm/common/drm_util.h"
#include "ui/ozone/platform/drm/gpu/drm_window.h"
#include "ui/ozone/platform/drm/gpu/gbm_device.h"
#include "ui/ozone/platform/drm/gpu/gbm_surface_factory.h"
#include "ui/ozone/platform/drm/gpu/gbm_surfaceless.h"
namespace ui {
GbmBuffer::GbmBuffer(const scoped_refptr<GbmDevice>& gbm,
gbm_bo* bo,
gfx::BufferUsage usage)
: GbmBufferBase(gbm,
bo,
usage == gfx::BufferUsage::GPU_READ ||
usage == gfx::BufferUsage::GPU_READ_WRITE),
usage_(usage) {}
GbmBuffer::~GbmBuffer() {
if (bo())
gbm_bo_destroy(bo());
}
// static
scoped_refptr<GbmBuffer> GbmBuffer::CreateBuffer(
const scoped_refptr<GbmDevice>& gbm,
gfx::BufferFormat format,
const gfx::Size& size,
gfx::BufferUsage usage) {
TRACE_EVENT2("drm", "GbmBuffer::CreateBuffer", "device",
gbm->device_path().value(), "size", size.ToString());
bool with_cpu_access =
usage == gfx::BufferUsage::GPU_READ_CPU_READ_WRITE ||
usage == gfx::BufferUsage::GPU_READ_CPU_READ_WRITE_PERSISTENT;
unsigned flags = 0;
// GBM_BO_USE_SCANOUT is the hint of x-tiling.
if (!with_cpu_access)
flags = GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING;
gbm_bo* bo = gbm_bo_create(gbm->device(), size.width(), size.height(),
GetFourCCFormatFromBufferFormat(format), flags);
if (!bo)
return nullptr;
scoped_refptr<GbmBuffer> buffer(new GbmBuffer(gbm, bo, usage));
if (!with_cpu_access && !buffer->GetFramebufferId())
return nullptr;
return buffer;
}
GbmPixmap::GbmPixmap(GbmSurfaceFactory* surface_manager)
: surface_manager_(surface_manager) {}
void GbmPixmap::Initialize(base::ScopedFD dma_buf, int dma_buf_pitch) {
dma_buf_ = dma_buf.Pass();
dma_buf_pitch_ = dma_buf_pitch;
}
bool GbmPixmap::InitializeFromBuffer(const scoped_refptr<GbmBuffer>& buffer) {
// We want to use the GBM API because it's going to call into libdrm
// which might do some optimizations on buffer allocation,
// especially when sharing buffers via DMABUF.
base::ScopedFD dma_buf(gbm_bo_get_fd(buffer->bo()));
if (!dma_buf.is_valid()) {
PLOG(ERROR) << "Failed to export buffer to dma_buf";
return false;
}
Initialize(dma_buf.Pass(), gbm_bo_get_stride(buffer->bo()));
buffer_ = buffer;
return true;
}
void GbmPixmap::SetScalingCallback(const ScalingCallback& scaling_callback) {
scaling_callback_ = scaling_callback;
}
scoped_refptr<NativePixmap> GbmPixmap::GetScaledPixmap(gfx::Size new_size) {
return scaling_callback_.Run(new_size);
}
gfx::NativePixmapHandle GbmPixmap::ExportHandle() {
gfx::NativePixmapHandle handle;
base::ScopedFD dmabuf_fd(HANDLE_EINTR(dup(dma_buf_.get())));
if (!dmabuf_fd.is_valid()) {
PLOG(ERROR) << "dup";
return handle;
}
handle.fd = base::FileDescriptor(dmabuf_fd.release(), true /* auto_close */);
handle.stride = dma_buf_pitch_;
return handle;
}
GbmPixmap::~GbmPixmap() {
}
void* GbmPixmap::GetEGLClientBuffer() {
return nullptr;
}
int GbmPixmap::GetDmaBufFd() {
return dma_buf_.get();
}
int GbmPixmap::GetDmaBufPitch() {
return dma_buf_pitch_;
}
bool GbmPixmap::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
int plane_z_order,
gfx::OverlayTransform plane_transform,
const gfx::Rect& display_bounds,
const gfx::RectF& crop_rect) {
gfx::Size required_size;
if (plane_z_order &&
ShouldApplyScaling(display_bounds, crop_rect, &required_size)) {
scoped_refptr<NativePixmap> scaled_pixmap = GetScaledPixmap(required_size);
if (scaled_pixmap) {
return scaled_pixmap->ScheduleOverlayPlane(
widget, plane_z_order, plane_transform, display_bounds, crop_rect);
} else {
return false;
}
}
// TODO(reveman): Add support for imported buffers. crbug.com/541558
if (!buffer_) {
PLOG(ERROR) << "ScheduleOverlayPlane requires a buffer.";
return false;
}
DCHECK(buffer_->GetUsage() == gfx::BufferUsage::GPU_READ ||
buffer_->GetUsage() == gfx::BufferUsage::GPU_READ_WRITE);
surface_manager_->GetSurface(widget)->QueueOverlayPlane(OverlayPlane(
buffer_, plane_z_order, plane_transform, display_bounds, crop_rect));
return true;
}
bool GbmPixmap::ShouldApplyScaling(const gfx::Rect& display_bounds,
const gfx::RectF& crop_rect,
gfx::Size* required_size) {
if (crop_rect.width() == 0 || crop_rect.height() == 0) {
PLOG(ERROR) << "ShouldApplyScaling passed zero scaling target.";
return false;
}
if (!buffer_) {
PLOG(ERROR) << "ShouldApplyScaling requires a buffer.";
return false;
}
gfx::Size pixmap_size = buffer_->GetSize();
// If the required size is not integer-sized, round it to the next integer.
*required_size = gfx::ToCeiledSize(
gfx::SizeF(display_bounds.width() / crop_rect.width(),
display_bounds.height() / crop_rect.height()));
return pixmap_size != *required_size;
}
} // namespace ui
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