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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/trace_event/trace_event.h"
#include "ui/ozone/platform/drm/gpu/gbm_device.h"
namespace ui {
namespace {
int GetGbmFormatFromBufferFormat(SurfaceFactoryOzone::BufferFormat fmt) {
switch (fmt) {
case SurfaceFactoryOzone::RGBA_8888:
return GBM_BO_FORMAT_ARGB8888;
case SurfaceFactoryOzone::RGBX_8888:
return GBM_BO_FORMAT_XRGB8888;
default:
NOTREACHED();
return 0;
}
}
} // namespace
GbmBuffer::GbmBuffer(const scoped_refptr<GbmDevice>& gbm,
gbm_bo* bo,
bool scanout)
: GbmBufferBase(gbm, bo, scanout) {
}
GbmBuffer::~GbmBuffer() {
if (bo())
gbm_bo_destroy(bo());
}
// static
scoped_refptr<GbmBuffer> GbmBuffer::CreateBuffer(
const scoped_refptr<GbmDevice>& gbm,
SurfaceFactoryOzone::BufferFormat format,
const gfx::Size& size,
bool scanout) {
TRACE_EVENT2("drm", "GbmBuffer::CreateBuffer", "device",
gbm->device_path().value(), "size", size.ToString());
unsigned flags = GBM_BO_USE_RENDERING;
if (scanout)
flags |= GBM_BO_USE_SCANOUT;
gbm_bo* bo = gbm_bo_create(gbm->device(), size.width(), size.height(),
GetGbmFormatFromBufferFormat(format), flags);
if (!bo)
return NULL;
scoped_refptr<GbmBuffer> buffer(new GbmBuffer(gbm, bo, scanout));
if (scanout && !buffer->GetFramebufferId())
return NULL;
return buffer;
}
GbmPixmap::GbmPixmap(const scoped_refptr<GbmBuffer>& buffer)
: buffer_(buffer), dma_buf_(-1) {
}
bool GbmPixmap::Initialize() {
// 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.
dma_buf_ = gbm_bo_get_fd(buffer_->bo());
if (dma_buf_ < 0) {
PLOG(ERROR) << "Failed to export buffer to dma_buf";
return false;
}
return true;
}
GbmPixmap::~GbmPixmap() {
if (dma_buf_ > 0)
close(dma_buf_);
}
void* GbmPixmap::GetEGLClientBuffer() {
return nullptr;
}
int GbmPixmap::GetDmaBufFd() {
return dma_buf_;
}
int GbmPixmap::GetDmaBufPitch() {
return gbm_bo_get_stride(buffer_->bo());
}
} // namespace ui
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