Differential D5179 Diff 14337 plugins/platforms/drm/drm_buffer.cpp

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plugins/platforms/drm/drm_buffer.cpp

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22 22​
23#include "logging.h" 23​#include "logging.h"
24 24​
25// system 25​// system
26#include <sys/mman.h> 26​#include <sys/mman.h>
27#include <errno.h> 27​#include <errno.h>
28// drm 28​// drm
29#include <xf86drm.h> 29​#include <xf86drm.h>
30#if HAVE_GBM ​
31#include <gbm.h> ​
32#endif ​
33 30​
34namespace KWin 31​namespace KWin
35{ 32​{
36 33​
37 34​DrmBuffer:: DrmBuffer(DrmBackend *backend)
38DrmBuffer::DrmBuffer(DrmBackend *backend, const QSize &size) ​
39 : m_backend(backend) 35​ : m_backend(backend)
40 , m_size(size) ​
41{ 36​{
37​}
38​
39​// DrmDumbBuffer
40​DrmDumbBuffer::DrmDumbBuffer(DrmBackend *backend, const QSize &size)
41​ : DrmBuffer(backend)
42​{
43​ m_size = size;
42 drm_mode_create_dumb createArgs; 44​ drm_mode_create_dumb createArgs;
43 memset(&createArgs, 0, sizeof createArgs); 45​ memset(&createArgs, 0, sizeof createArgs);
44 createArgs.bpp = 32; 46​ createArgs.bpp = 32;
45 createArgs.width = size.width(); 47​ createArgs.width = size.width();
46 createArgs.height = size.height(); 48​ createArgs.height = size.height();
47 if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_CREATE_DUMB, &createArgs) != 0) { 49​ if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_CREATE_DUMB, &createArgs) != 0) {
48 qCWarning(KWIN_DRM) << "DRM_IOCTL_MODE_CREATE_DUMB failed"; 50​ qCWarning(KWIN_DRM) << "DRM_IOCTL_MODE_CREATE_DUMB failed";
49 return; 51​ return;
50 } 52​ }
51 m_handle = createArgs.handle; 53​ m_handle = createArgs.handle;
52 m_bufferSize = createArgs.size; 54​ m_bufferSize = createArgs.size;
53 m_stride = createArgs.pitch; 55​ m_stride = createArgs.pitch;
54 if (drmModeAddFB(m_backend->fd(), size.width(), size.height(), 24, 32, 56​ if (drmModeAddFB(m_backend->fd(), size.width(), size.height(), 24, 32,
55 m_stride, createArgs.handle, &m_bufferId) != 0) { 57​ m_stride, createArgs.handle, &m_bufferId) != 0) {
56 qCWarning(KWIN_DRM) << "drmModeAddFB failed with errno" << errno; 58​ qCWarning(KWIN_DRM) << "drmModeAddFB failed with errno" << errno;
57 } 59​ }
58} 60​}
59 61​
60 62​DrmDumbBuffer::~DrmDumbBuffer()
61#if HAVE_GBM ​
62static void gbmCallback(gbm_bo *bo, void *data) ​
63{ ​
64 DrmBackend *backend = reinterpret_cast<DrmBackend*>(data); ​
65 const auto &buffers = backend->buffers(); ​
66 for (auto buffer: buffers) { ​
67 if (buffer->gbm() == bo) { ​
68 delete buffer; ​
69 return; ​
70 } ​
71 } ​
72} ​
73#endif ​
74 ​
75DrmBuffer::DrmBuffer(DrmBackend *backend, gbm_surface *surface) ​
76 : m_backend(backend) ​
77 , m_surface(surface) ​
78{ ​
79#if HAVE_GBM ​
80 m_bo = gbm_surface_lock_front_buffer(surface); ​
81 if (!m_bo) { ​
82 qCWarning(KWIN_DRM) << "Locking front buffer failed"; ​
83 return; ​
84 } ​
85 m_size = QSize(gbm_bo_get_width(m_bo), gbm_bo_get_height(m_bo)); ​
86 m_stride = gbm_bo_get_stride(m_bo); ​
87 if (drmModeAddFB(m_backend->fd(), m_size.width(), m_size.height(), 24, 32, m_stride, gbm_bo_get_handle(m_bo).u32, &m_bufferId) != 0) { ​
88 qCWarning(KWIN_DRM) << "drmModeAddFB failed"; ​
89 } ​
90 gbm_bo_set_user_data(m_bo, m_backend, gbmCallback); ​
91#endif ​
92} ​
93 ​
94DrmBuffer::~DrmBuffer() ​
95{ 63​{
96 if (m_bufferId) { 64​ if (m_bufferId) {
97 drmModeRmFB(m_backend->fd(), m_bufferId); 65​ drmModeRmFB(m_backend->fd(), m_bufferId);
98 } 66​ }
99 m_backend->bufferDestroyed(this); 67​
100 delete m_image; 68​ delete m_image;
101 if (m_memory) { 69​ if (m_memory) {
102 munmap(m_memory, m_bufferSize); 70​ munmap(m_memory, m_bufferSize);
103 } 71​ }
104 if (m_handle) { 72​ if (m_handle) {
105 drm_mode_destroy_dumb destroyArgs; 73​ drm_mode_destroy_dumb destroyArgs;
106 destroyArgs.handle = m_handle; 74​ destroyArgs.handle = m_handle;
107 drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_DESTROY_DUMB, &destroyArgs); 75​ drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_DESTROY_DUMB, &destroyArgs);
108 } 76​ }
109 releaseGbm(); ​
110} 77​}
111 78​
112bool DrmBuffer::map(QImage::Format format) 79​bool DrmDumbBuffer::needsModeChange(DrmBuffer *b) const {
80​ if (DrmDumbBuffer *db = dynamic_cast<DrmDumbBuffer*>(b)) {
81​ return m_stride != db->stride();
82​ } else {
83​ return true;
84​ }
85​}
86​
87​bool DrmDumbBuffer::map(QImage::Format format)
113{ 88​{
114 if (!m_handle || !m_bufferId) { 89​ if (!m_handle || !m_bufferId) {
115 return false; 90​ return false;
116 } 91​ }
117 drm_mode_map_dumb mapArgs; 92​ drm_mode_map_dumb mapArgs;
118 memset(&mapArgs, 0, sizeof mapArgs); 93​ memset(&mapArgs, 0, sizeof mapArgs);
119 mapArgs.handle = m_handle; 94​ mapArgs.handle = m_handle;
120 if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_MAP_DUMB, &mapArgs) != 0) { 95​ if (drmIoctl(m_backend->fd(), DRM_IOCTL_MODE_MAP_DUMB, &mapArgs) != 0) {
121 return false; 96​ return false;
122 } 97​ }
123 void *address = mmap(nullptr, m_bufferSize, PROT_WRITE, MAP_SHARED, m_backend->fd(), mapArgs.offset); 98​ void *address = mmap(nullptr, m_bufferSize, PROT_WRITE, MAP_SHARED, m_backend->fd(), mapArgs.offset);
124 if (address == MAP_FAILED) { 99​ if (address == MAP_FAILED) {
125 return false; 100​ return false;
126 } 101​ }
127 m_memory = address; 102​ m_memory = address;
128 m_image = new QImage((uchar*)m_memory, m_size.width(), m_size.height(), m_stride, format); 103​ m_image = new QImage((uchar*)m_memory, m_size.width(), m_size.height(), m_stride, format);
129 return !m_image->isNull(); 104​ return !m_image->isNull();
130} 105​}
131 106​
132void DrmBuffer::releaseGbm() ​
133{ ​
134#if HAVE_GBM ​
135 if (m_bo) { ​
136 gbm_surface_release_buffer(m_surface, m_bo); ​
137 m_bo = nullptr; ​
138 } ​
139#endif ​
140} ​
141 ​
142} 107​}