blob: 7e6154075aba76a10221fa56e912180fef5e186f [file] [log] [blame]
// Copyright 2016 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <directfb.h>
#include "starboard/blitter.h"
#include "starboard/log.h"
#include "starboard/shared/directfb/blitter_internal.h"
SbBlitterPixelData SbBlitterCreatePixelData(
SbBlitterDevice device,
int width,
int height,
SbBlitterPixelDataFormat pixel_format) {
if (!SbBlitterIsDeviceValid(device)) {
SB_DLOG(ERROR) << __FUNCTION__ << ": Invalid device.";
return kSbBlitterInvalidPixelData;
}
if (!SbBlitterIsPixelFormatSupportedByPixelData(device, pixel_format)) {
SB_DLOG(ERROR) << __FUNCTION__ << ": Unsupported pixel format.";
return kSbBlitterInvalidPixelData;
}
if (width <= 0 || height <= 0) {
SB_DLOG(ERROR) << __FUNCTION__ << ": Width and height must both be "
<< "greater than 0.";
return kSbBlitterInvalidPixelData;
}
starboard::ScopedLock lock(device->mutex);
// We create an actual DirectFB surface here, and then immediately lock it
// so that we can grant the CPU access to the pixel data until we are ready
// to bake it into a SbBlitterSurface.
IDirectFBSurface* surface;
DFBSurfaceDescription dsc;
dsc.width = width;
dsc.height = height;
dsc.flags = static_cast<DFBSurfaceDescriptionFlags>(
DSDESC_HEIGHT | DSDESC_WIDTH | DSDESC_PIXELFORMAT | DSDESC_CAPS);
// Specify that we wish for this surface data to live in device memory.
dsc.caps = static_cast<DFBSurfaceCapabilities>(DSCAPS_STATIC_ALLOC |
DSCAPS_PREMULTIPLIED);
switch (pixel_format) {
// Conversion from Starboard's byte-order color formats to DirectFB's
// word-order color formats.
#if SB_IS_LITTLE_ENDIAN
case kSbBlitterPixelDataFormatBGRA8: {
#else
case kSbBlitterPixelDataFormatARGB8: {
#endif
dsc.pixelformat = DSPF_ARGB;
} break;
case kSbBlitterPixelDataFormatA8: {
dsc.pixelformat = DSPF_A8;
} break;
default: { SB_NOTREACHED(); }
}
IDirectFB* dfb = device->dfb;
if (dfb->CreateSurface(dfb, &dsc, &surface) != DFB_OK) {
SB_DLOG(ERROR) << __FUNCTION__ << ": Error calling CreateSurface().";
return kSbBlitterInvalidPixelData;
}
// Immediately lock the surface so that the CPU has access to the pixel data.
void* data;
int pitch_in_bytes;
if (surface->Lock(surface, DSLF_WRITE, &data, &pitch_in_bytes) != DFB_OK) {
SB_DLOG(ERROR) << __FUNCTION__ << ": Error calling Lock().";
surface->Release(surface);
return kSbBlitterInvalidPixelData;
}
SbBlitterPixelDataPrivate* surface_pixels = new SbBlitterPixelDataPrivate();
surface_pixels->device = device;
surface_pixels->info.width = width;
surface_pixels->info.height = height;
surface_pixels->info.format =
SbBlitterPixelDataFormatToSurfaceFormat(pixel_format);
surface_pixels->surface = surface;
surface_pixels->data = data;
surface_pixels->pitch_in_bytes = pitch_in_bytes;
return surface_pixels;
}