22d22eb282
This will also cause clearing to 0,0,0,0. Essential in order to allow fast testing of window transparency issues in combination with QRhi and the various backends. Change-Id: Iee2763c1d06f1d3e5d59a9142abaf30fab1dc543 Reviewed-by: Christian Strømme <christian.stromme@qt.io>
329 lines
11 KiB
C++
329 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2018 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "../shared/examplefw.h"
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#include <qmath.h>
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QByteArray loadHdr(const QString &fn, QSize *size)
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{
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QFile f(fn);
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if (!f.open(QIODevice::ReadOnly)) {
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qWarning("Failed to open %s", qPrintable(fn));
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return QByteArray();
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}
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char sig[256];
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f.read(sig, 11);
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if (strncmp(sig, "#?RADIANCE\n", 11))
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return QByteArray();
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QByteArray buf = f.readAll();
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const char *p = buf.constData();
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const char *pEnd = p + buf.size();
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// Process lines until the empty one.
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QByteArray line;
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while (p < pEnd) {
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char c = *p++;
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if (c == '\n') {
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if (line.isEmpty())
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break;
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if (line.startsWith(QByteArrayLiteral("FORMAT="))) {
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const QByteArray format = line.mid(7).trimmed();
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if (format != QByteArrayLiteral("32-bit_rle_rgbe")) {
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qWarning("HDR format '%s' is not supported", format.constData());
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return QByteArray();
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}
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}
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line.clear();
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} else {
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line.append(c);
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}
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}
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if (p == pEnd) {
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qWarning("Malformed HDR image data at property strings");
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return QByteArray();
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}
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// Get the resolution string.
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while (p < pEnd) {
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char c = *p++;
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if (c == '\n')
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break;
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line.append(c);
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}
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if (p == pEnd) {
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qWarning("Malformed HDR image data at resolution string");
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return QByteArray();
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}
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int w = 0, h = 0;
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// We only care about the standard orientation.
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if (!sscanf(line.constData(), "-Y %d +X %d", &h, &w)) {
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qWarning("Unsupported HDR resolution string '%s'", line.constData());
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return QByteArray();
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}
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if (w <= 0 || h <= 0) {
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qWarning("Invalid HDR resolution");
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return QByteArray();
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}
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// output is RGBA32F
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const int blockSize = 4 * sizeof(float);
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QByteArray data;
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data.resize(w * h * blockSize);
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typedef unsigned char RGBE[4];
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RGBE *scanline = new RGBE[w];
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for (int y = 0; y < h; ++y) {
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if (pEnd - p < 4) {
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qWarning("Unexpected end of HDR data");
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delete[] scanline;
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return QByteArray();
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}
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scanline[0][0] = *p++;
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scanline[0][1] = *p++;
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scanline[0][2] = *p++;
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scanline[0][3] = *p++;
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if (scanline[0][0] == 2 && scanline[0][1] == 2 && scanline[0][2] < 128) {
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// new rle, the first pixel was a dummy
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for (int channel = 0; channel < 4; ++channel) {
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for (int x = 0; x < w && p < pEnd; ) {
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unsigned char c = *p++;
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if (c > 128) { // run
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if (p < pEnd) {
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int repCount = c & 127;
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c = *p++;
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while (repCount--)
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scanline[x++][channel] = c;
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}
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} else { // not a run
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while (c-- && p < pEnd)
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scanline[x++][channel] = *p++;
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}
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}
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}
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} else {
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// old rle
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scanline[0][0] = 2;
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int bitshift = 0;
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int x = 1;
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while (x < w && pEnd - p >= 4) {
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scanline[x][0] = *p++;
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scanline[x][1] = *p++;
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scanline[x][2] = *p++;
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scanline[x][3] = *p++;
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if (scanline[x][0] == 1 && scanline[x][1] == 1 && scanline[x][2] == 1) { // run
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int repCount = scanline[x][3] << bitshift;
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while (repCount--) {
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memcpy(scanline[x], scanline[x - 1], 4);
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++x;
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}
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bitshift += 8;
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} else { // not a run
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++x;
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bitshift = 0;
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}
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}
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}
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// adjust for -Y orientation
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float *fp = reinterpret_cast<float *>(data.data() + (h - 1 - y) * blockSize * w);
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for (int x = 0; x < w; ++x) {
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float d = qPow(2.0f, float(scanline[x][3]) - 128.0f);
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// r, g, b, a
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*fp++ = scanline[x][0] / 256.0f * d;
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*fp++ = scanline[x][1] / 256.0f * d;
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*fp++ = scanline[x][2] / 256.0f * d;
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*fp++ = 1.0f;
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}
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}
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delete[] scanline;
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if (size)
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*size = QSize(w, h);
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return data;
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}
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static float vertexData[] =
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{ // Y up, CCW
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-0.5f, 0.5f, 0.0f, 0.0f,
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-0.5f, -0.5f, 0.0f, 1.0f,
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0.5f, -0.5f, 1.0f, 1.0f,
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0.5f, 0.5f, 1.0f, 0.0f
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};
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static quint16 indexData[] =
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{
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0, 1, 2, 0, 2, 3
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};
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struct {
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QVector<QRhiResource *> releasePool;
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QRhiBuffer *vbuf = nullptr;
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QRhiBuffer *ibuf = nullptr;
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QRhiBuffer *ubuf = nullptr;
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QRhiTexture *tex = nullptr;
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QRhiSampler *sampler = nullptr;
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QRhiShaderResourceBindings *srb = nullptr;
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QRhiGraphicsPipeline *ps = nullptr;
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QRhiResourceUpdateBatch *initialUpdates = nullptr;
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QMatrix4x4 winProj;
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} d;
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void Window::customInit()
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{
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if (!m_r->isTextureFormatSupported(QRhiTexture::RGBA32F))
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qWarning("RGBA32F texture format is not supported");
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QSize size;
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QByteArray floatData = loadHdr(QLatin1String(":/OpenfootageNET_fieldairport-512.hdr"), &size);
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Q_ASSERT(!floatData.isEmpty());
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qDebug() << size;
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d.vbuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(vertexData));
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d.vbuf->build();
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d.releasePool << d.vbuf;
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d.ibuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::IndexBuffer, sizeof(indexData));
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d.ibuf->build();
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d.releasePool << d.ibuf;
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d.ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 68);
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d.ubuf->build();
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d.releasePool << d.ubuf;
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d.tex = m_r->newTexture(QRhiTexture::RGBA32F, size);
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d.releasePool << d.tex;
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d.tex->build();
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d.sampler = m_r->newSampler(QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::None,
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QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge);
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d.releasePool << d.sampler;
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d.sampler->build();
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d.srb = m_r->newShaderResourceBindings();
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d.releasePool << d.srb;
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d.srb->setBindings({
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QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage, d.ubuf),
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QRhiShaderResourceBinding::sampledTexture(1, QRhiShaderResourceBinding::FragmentStage, d.tex, d.sampler)
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});
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d.srb->build();
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d.ps = m_r->newGraphicsPipeline();
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d.releasePool << d.ps;
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d.ps->setShaderStages({
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{ QRhiShaderStage::Vertex, getShader(QLatin1String(":/texture.vert.qsb")) },
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{ QRhiShaderStage::Fragment, getShader(QLatin1String(":/texture.frag.qsb")) }
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});
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QRhiVertexInputLayout inputLayout;
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inputLayout.setBindings({
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{ 4 * sizeof(float) }
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});
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inputLayout.setAttributes({
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{ 0, 0, QRhiVertexInputAttribute::Float2, 0 },
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{ 0, 1, QRhiVertexInputAttribute::Float2, 2 * sizeof(float) }
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});
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d.ps->setVertexInputLayout(inputLayout);
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d.ps->setShaderResourceBindings(d.srb);
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d.ps->setRenderPassDescriptor(m_rp);
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d.ps->build();
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d.initialUpdates = m_r->nextResourceUpdateBatch();
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d.initialUpdates->uploadStaticBuffer(d.vbuf, vertexData);
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d.initialUpdates->uploadStaticBuffer(d.ibuf, indexData);
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qint32 flip = 1;
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d.initialUpdates->updateDynamicBuffer(d.ubuf, 64, 4, &flip);
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QRhiTextureUploadDescription desc({ 0, 0, { floatData.constData(), floatData.size() } });
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d.initialUpdates->uploadTexture(d.tex, desc);
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}
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void Window::customRelease()
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{
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qDeleteAll(d.releasePool);
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d.releasePool.clear();
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}
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void Window::customRender()
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{
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QRhiCommandBuffer *cb = m_sc->currentFrameCommandBuffer();
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QRhiResourceUpdateBatch *u = m_r->nextResourceUpdateBatch();
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if (d.initialUpdates) {
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u->merge(d.initialUpdates);
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d.initialUpdates->release();
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d.initialUpdates = nullptr;
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}
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if (d.winProj != m_proj) {
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d.winProj = m_proj;
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QMatrix4x4 mvp = m_proj;
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mvp.scale(2.5f);
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u->updateDynamicBuffer(d.ubuf, 0, 64, mvp.constData());
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}
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const QSize outputSizeInPixels = m_sc->currentPixelSize();
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cb->beginPass(m_sc->currentFrameRenderTarget(), m_clearColor, { 1.0f, 0 }, u);
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cb->setGraphicsPipeline(d.ps);
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cb->setViewport({ 0, 0, float(outputSizeInPixels.width()), float(outputSizeInPixels.height()) });
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cb->setShaderResources();
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const QRhiCommandBuffer::VertexInput vbufBinding(d.vbuf, 0);
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cb->setVertexInput(0, 1, &vbufBinding, d.ibuf, 0, QRhiCommandBuffer::IndexUInt16);
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cb->drawIndexed(6);
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cb->endPass();
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}
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