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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2019 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
#ifndef _WIN32
#include "config.h"
#endif
#include "graphics_data.h"
void GRAPHICS_BUFFER::clear() {
}
void GRAPHICS_DOUBLE_BUFFER::init(GRAPHICS_BUFFER* _b1, GRAPHICS_BUFFER* _b2) {
b1 = _b1;
b2 = _b2;
}
GRAPHICS_BUFFER* GRAPHICS_DOUBLE_BUFFER::get_buffer(int state) {
if (b1->state == state) return b1;
if (b2->state == state) return b2;
return 0;
}
GRAPHICS_BUFFER* GRAPHICS_DOUBLE_BUFFER::get_render_buffer() {
GRAPHICS_BUFFER* b, *other;
b = get_buffer(GB_STATE_RENDERING);
if (!b) b = get_buffer(GB_STATE_RENDERED);
if (!b) b = get_buffer(GB_STATE_GENERATED);
if (b) {
if (b->state == GB_STATE_RENDERED) {
other = get_buffer(GB_STATE_GENERATED);
if (other) {
b->clear();
b->state = GB_STATE_IDLE;
b = other;
b->state = GB_STATE_RENDERING;
}
} else {
b->state = GB_STATE_RENDERING;
}
}
return b;
}
void GRAPHICS_DOUBLE_BUFFER::render_done(GRAPHICS_BUFFER* b) {
b->state = GB_STATE_RENDERED;
}
GRAPHICS_BUFFER* GRAPHICS_DOUBLE_BUFFER::get_generate_buffer(bool first) {
GRAPHICS_BUFFER* b;
b = get_buffer(GB_STATE_GENERATING);
if (!b && first) {
b = get_buffer(GB_STATE_IDLE);
if (b) {
b->state = GB_STATE_GENERATING;
}
}
return b;
}
void GRAPHICS_DOUBLE_BUFFER::generate_done(GRAPHICS_BUFFER* b) {
b->state = GB_STATE_GENERATED;
}
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