1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "texturedcuberenderer.h"
#include <QFile>
#include <QtGui/private/qshader_p.h>
#include "../shared/cube.h"
const bool MIPMAP = true;
const bool AUTOGENMIPMAP = true;
static QShader getShader(const QString &name)
{
QFile f(name);
if (f.open(QIODevice::ReadOnly))
return QShader::fromSerialized(f.readAll());
return QShader();
}
void TexturedCubeRenderer::initResources(QRhiRenderPassDescriptor *rp)
{
m_vbuf = m_r->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(cube));
m_vbuf->setName(QByteArrayLiteral("Cube vbuf (textured)"));
m_vbuf->create();
m_vbufReady = false;
m_ubuf = m_r->newBuffer(QRhiBuffer::Dynamic, QRhiBuffer::UniformBuffer, 64 + 4);
m_ubuf->setName(QByteArrayLiteral("Cube ubuf (textured)"));
m_ubuf->create();
m_image = QImage(QLatin1String(":/qt256.png")).convertToFormat(QImage::Format_RGBA8888);
QRhiTexture::Flags texFlags;
if (MIPMAP)
texFlags |= QRhiTexture::MipMapped;
if (AUTOGENMIPMAP)
texFlags |= QRhiTexture::UsedWithGenerateMips;
m_tex = m_r->newTexture(QRhiTexture::RGBA8, QSize(m_image.width(), m_image.height()), 1, texFlags);
m_tex->setName(QByteArrayLiteral("Qt texture"));
m_tex->create();
m_sampler = m_r->newSampler(QRhiSampler::Linear, QRhiSampler::Linear, MIPMAP ? QRhiSampler::Linear : QRhiSampler::None,
QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge);
m_sampler->create();
m_srb = m_r->newShaderResourceBindings();
m_srb->setBindings({
QRhiShaderResourceBinding::uniformBuffer(0, QRhiShaderResourceBinding::VertexStage | QRhiShaderResourceBinding::FragmentStage, m_ubuf),
QRhiShaderResourceBinding::sampledTexture(1, QRhiShaderResourceBinding::FragmentStage, m_tex, m_sampler)
});
m_srb->create();
m_ps = m_r->newGraphicsPipeline();
// No blending but the texture has alpha which we do not want to write out.
// Be nice. (would not matter for an onscreen window but makes a difference
// when reading back and saving into image files f.ex.)
QRhiGraphicsPipeline::TargetBlend blend;
blend.colorWrite = QRhiGraphicsPipeline::R | QRhiGraphicsPipeline::G | QRhiGraphicsPipeline::B;
m_ps->setTargetBlends({ blend });
m_ps->setDepthTest(true);
m_ps->setDepthWrite(true);
m_ps->setDepthOp(QRhiGraphicsPipeline::Less);
m_ps->setCullMode(QRhiGraphicsPipeline::Back);
m_ps->setFrontFace(QRhiGraphicsPipeline::CCW);
m_ps->setSampleCount(m_sampleCount);
QShader vs = getShader(QLatin1String(":/texture.vert.qsb"));
Q_ASSERT(vs.isValid());
QShader fs = getShader(QLatin1String(":/texture.frag.qsb"));
Q_ASSERT(fs.isValid());
m_ps->setShaderStages({
{ QRhiShaderStage::Vertex, vs },
{ QRhiShaderStage::Fragment, fs }
});
QRhiVertexInputLayout inputLayout;
inputLayout.setBindings({
{ 3 * sizeof(float) },
{ 2 * sizeof(float) }
});
inputLayout.setAttributes({
{ 0, 0, QRhiVertexInputAttribute::Float3, 0 },
{ 1, 1, QRhiVertexInputAttribute::Float2, 0 }
});
m_ps->setVertexInputLayout(inputLayout);
m_ps->setShaderResourceBindings(m_srb);
m_ps->setRenderPassDescriptor(rp);
m_ps->create();
}
void TexturedCubeRenderer::resize(const QSize &pixelSize)
{
m_proj = m_r->clipSpaceCorrMatrix();
m_proj.perspective(45.0f, pixelSize.width() / (float) pixelSize.height(), 0.01f, 100.0f);
m_proj.translate(0, 0, -4);
}
void TexturedCubeRenderer::releaseResources()
{
delete m_ps;
m_ps = nullptr;
delete m_srb;
m_srb = nullptr;
delete m_sampler;
m_sampler = nullptr;
delete m_tex;
m_tex = nullptr;
delete m_ubuf;
m_ubuf = nullptr;
delete m_vbuf;
m_vbuf = nullptr;
}
void TexturedCubeRenderer::queueResourceUpdates(QRhiResourceUpdateBatch *resourceUpdates)
{
if (!m_vbufReady) {
m_vbufReady = true;
resourceUpdates->uploadStaticBuffer(m_vbuf, cube);
qint32 flip = 0;
resourceUpdates->updateDynamicBuffer(m_ubuf, 64, 4, &flip);
}
if (!m_image.isNull()) {
if (MIPMAP) {
QVarLengthArray<QRhiTextureUploadEntry, 16> descEntries;
if (!AUTOGENMIPMAP) {
// the ghetto mipmap generator...
for (int i = 0, ie = m_r->mipLevelsForSize(m_image.size()); i != ie; ++i) {
QImage image = m_image.scaled(m_r->sizeForMipLevel(i, m_image.size()));
descEntries.append({ 0, i, QRhiTextureSubresourceUploadDescription(image) });
}
} else {
descEntries.append({ 0, 0, QRhiTextureSubresourceUploadDescription(m_image) });
}
QRhiTextureUploadDescription desc;
desc.setEntries(descEntries.cbegin(), descEntries.cend());
resourceUpdates->uploadTexture(m_tex, desc);
if (AUTOGENMIPMAP)
resourceUpdates->generateMips(m_tex);
} else {
resourceUpdates->uploadTexture(m_tex, m_image);
}
m_image = QImage();
}
m_rotation += 1.0f;
QMatrix4x4 mvp = m_proj;
mvp.translate(m_translation);
mvp.scale(0.5f);
mvp.rotate(m_rotation, 0, 1, 0);
resourceUpdates->updateDynamicBuffer(m_ubuf, 0, 64, mvp.constData());
}
void TexturedCubeRenderer::queueDraw(QRhiCommandBuffer *cb, const QSize &outputSizeInPixels)
{
cb->setGraphicsPipeline(m_ps);
cb->setViewport(QRhiViewport(0, 0, outputSizeInPixels.width(), outputSizeInPixels.height()));
cb->setShaderResources();
const QRhiCommandBuffer::VertexInput vbufBindings[] = {
{ m_vbuf, 0 },
{ m_vbuf, quint32(36 * 3 * sizeof(float)) }
};
cb->setVertexInput(0, 2, vbufBindings);
cb->draw(36);
}
|
