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39
40#include "attachmentpack_p.h"
41#include <Qt3DRender/private/rendertarget_p.h>
42#include <Qt3DRender/private/rendertargetselectornode_p.h>
43
44QT_BEGIN_NAMESPACE
45
46namespace Qt3DRender {
47namespace Render {
48
49AttachmentPack::AttachmentPack()
50{
51}
52
53AttachmentPack::AttachmentPack(const RenderTarget *target,
54 AttachmentManager *attachmentManager,
55 const QVector<QRenderTargetOutput::AttachmentPoint> &drawBuffers)
56{
57 // Copy attachments
58 const auto outputIds = target->renderOutputs();
59 for (Qt3DCore::QNodeId outputId : outputIds) {
60 const RenderTargetOutput *output = attachmentManager->lookupResource(outputId);
61 if (output)
62 m_attachments.append(*output->attachment());
63 }
64
65 // Create actual DrawBuffers list that is used for glDrawBuffers
66
67 // If nothing is specified, use all the attachments as draw buffers
68 if (drawBuffers.isEmpty()) {
69 m_drawBuffers.reserve(m_attachments.size());
70 for (const Attachment &attachment : qAsConst(m_attachments))
71 // only consider Color Attachments
72 if (attachment.m_point <= QRenderTargetOutput::Color15)
73 m_drawBuffers.push_back((int) attachment.m_point);
74 } else {
75 m_drawBuffers.reserve(drawBuffers.size());
76 for (QRenderTargetOutput::AttachmentPoint drawBuffer : drawBuffers)
77 if (drawBuffer <= QRenderTargetOutput::Color15)
78 m_drawBuffers.push_back((int) drawBuffer);
79 }
80}
81
82// return index of given attachment within actual draw buffers list
83int AttachmentPack::getDrawBufferIndex(QRenderTargetOutput::AttachmentPoint attachmentPoint) const
84{
85 for (int i = 0; i < m_drawBuffers.size(); i++)
86 if (m_drawBuffers.at(i) == (int)attachmentPoint)
87 return i;
88 return -1;
89}
90
91bool operator ==(const Attachment &a, const Attachment &b)
92{
93 return (a.m_name == b.m_name &&
94 a.m_mipLevel == b.m_mipLevel &&
95 a.m_layer == b.m_layer &&
96 a.m_textureUuid == b.m_textureUuid &&
97 a.m_point == b.m_point &&
98 a.m_face == b.m_face);
99}
100
101bool operator !=(const Attachment &a, const Attachment &b)
102{
103 return !(a == b);
104}
105
106bool operator ==(const AttachmentPack &packA, const AttachmentPack &packB)
107{
108 return (packA.attachments() == packB.attachments() &&
109 packA.getGlDrawBuffers() == packB.getGlDrawBuffers());
110}
111
112bool operator !=(const AttachmentPack &packA, const AttachmentPack &packB)
113{
114 return !(packA == packB);
115}
116
117} // namespace Render
118} // namespace Qt3DRender
119
120QT_END_NAMESPACE
121

source code of qt3d/src/render/backend/attachmentpack.cpp