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displaylinkadapter.cpp
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displaylinkadapter.cpp
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/*
* displaylinkadapter.cpp - wraps libdlo functionality into an object
*
* Copyright (c) 2012 András Veres-Szentkirályi
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include "displaylinkadapter.h"
#include "displaylinkexception.h"
#include <string.h>
#include <stdlib.h>
dlo_bmpflags_t DisplayLinkAdapter::flags = { 0 };
DisplayLinkAdapter::DisplayLinkAdapter() {
dlo_init_t ini_flags = { 0 };
dlo_claim_t cnf_flags = { 0 };
OO_ERR(dlo_init(ini_flags));
uid = dlo_claim_first_device(cnf_flags, 0);
if (!uid) throw NoDisplayLinkFound();
setPreferredMode();
}
uint16_t DisplayLinkAdapter::height() const {
return mode_info->view.height;
}
uint16_t DisplayLinkAdapter::width() const {
return mode_info->view.width;
}
uint8_t DisplayLinkAdapter::bpp() const {
return mode_info->view.bpp;
}
uint8_t DisplayLinkAdapter::refresh() const {
return mode_info->refresh;
}
void DisplayLinkAdapter::setMode(uint16_t width, uint16_t height, uint8_t bpp, uint8_t refresh) {
dlo_mode_t mode;
mode.view.width = width;
mode.view.height = height;
mode.view.bpp = bpp;
mode.view.base = 0;
mode.refresh = refresh;
setModePointer(&mode);
}
void DisplayLinkAdapter::setPreferredMode() {
/* Select the monitor's preferred mode, based on EDID */
setModePointer(NULL);
}
void DisplayLinkAdapter::setModePointer(const dlo_mode_t *mode) {
OO_ERR(dlo_set_mode(uid, mode));
/* Read current mode information */
mode_info = dlo_get_mode(uid);
OO_NERR(mode_info);
}
DisplayLinkAdapter::~DisplayLinkAdapter() {
dlo_final_t fin_flags = { 0 };
if (uid) dlo_release_device(uid);
dlo_final(fin_flags);
}
void DisplayLinkAdapter::displayImage(const QImage &image) {
const dlo_view_t *view = &(mode_info->view);
dlo_dot_t dot;
dlo_fbuf_t fbuf;
OO_NERR(uid);
fbuf.width = image.width();
fbuf.height = image.height();
fbuf.stride = fbuf.width;
fbuf.fmt = dlo_pixfmt_argb8888;
dot.x = 0;
if (view->height > fbuf.height) {
dlo_rect_t rec;
rec.origin.x = 0;
rec.origin.y = 0;
rec.width = view->width;
dot.y = (view->height - fbuf.height) / 2;
rec.height = dot.y;
OO_ERR(dlo_fill_rect(uid, view, &rec, DLO_RGB(0, 0, 0)));
rec.origin.y = fbuf.height + dot.y;
rec.height = view->height - rec.origin.y;
OO_ERR(dlo_fill_rect(uid, view, &rec, DLO_RGB(0, 0, 0)));
} else {
dot.y = 0;
}
fbuf.base = malloc(image.byteCount());
OO_NERR(fbuf.base);
memcpy(fbuf.base, image.bits(), image.byteCount());
OO_ERR(dlo_copy_host_bmp(uid, flags, &fbuf, NULL, &dot));
free(fbuf.base);
}