src/platform/qt/DisplayGL.cpp (view raw)
1/* Copyright (c) 2013-2015 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "DisplayGL.h"
7
8#include <QApplication>
9#include <QResizeEvent>
10#include <QTimer>
11
12#include <mgba/core/core.h>
13#include <mgba/core/thread.h>
14#ifdef BUILD_GL
15#include "platform/opengl/gl.h"
16#endif
17#if !defined(_WIN32) || defined(USE_EPOXY)
18#include "platform/opengl/gles2.h"
19#ifdef _WIN32
20#include <epoxy/wgl.h>
21#endif
22#endif
23
24using namespace QGBA;
25
26DisplayGL::DisplayGL(const QGLFormat& format, QWidget* parent)
27 : Display(parent)
28 , m_isDrawing(false)
29 , m_gl(new EmptyGLWidget(format, this))
30 , m_drawThread(nullptr)
31 , m_context(nullptr)
32{
33 m_painter = new PainterGL(format.majorVersion() < 2 ? 1 : m_gl->format().majorVersion(), m_gl);
34 m_gl->setMouseTracking(true);
35 m_gl->setAttribute(Qt::WA_TransparentForMouseEvents); // This doesn't seem to work?
36}
37
38DisplayGL::~DisplayGL() {
39 delete m_painter;
40}
41
42bool DisplayGL::supportsShaders() const {
43 return m_painter->supportsShaders();
44}
45
46VideoShader* DisplayGL::shaders() {
47 VideoShader* shaders = nullptr;
48 if (m_drawThread) {
49 QMetaObject::invokeMethod(m_painter, "shaders", Qt::BlockingQueuedConnection, Q_RETURN_ARG(VideoShader*, shaders));
50 } else {
51 shaders = m_painter->shaders();
52 }
53 return shaders;
54}
55
56void DisplayGL::startDrawing(mCoreThread* thread) {
57 if (m_drawThread) {
58 return;
59 }
60 m_isDrawing = true;
61 m_painter->setContext(thread);
62 m_painter->setMessagePainter(messagePainter());
63 m_context = thread;
64 m_painter->resize(size());
65 m_gl->move(0, 0);
66 m_drawThread = new QThread(this);
67 m_drawThread->setObjectName("Painter Thread");
68 m_gl->context()->doneCurrent();
69 m_gl->context()->moveToThread(m_drawThread);
70 m_painter->moveToThread(m_drawThread);
71 connect(m_drawThread, SIGNAL(started()), m_painter, SLOT(start()));
72 m_drawThread->start();
73 mCoreSyncSetVideoSync(&m_context->sync, false);
74
75 lockAspectRatio(isAspectRatioLocked());
76 lockIntegerScaling(isIntegerScalingLocked());
77
78 unsigned width, height;
79 thread->core->desiredVideoDimensions(thread->core, &width, &height);
80 setSystemDimensions(width, height);
81
82 filter(isFiltered());
83#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
84 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatioF());
85#else
86 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatio());
87#endif
88 resizePainter();
89}
90
91void DisplayGL::stopDrawing() {
92 if (m_drawThread) {
93 m_isDrawing = false;
94 if (mCoreThreadIsActive(m_context)) {
95 mCoreThreadInterrupt(m_context);
96 }
97 QMetaObject::invokeMethod(m_painter, "stop", Qt::BlockingQueuedConnection);
98 m_drawThread->exit();
99 m_drawThread = nullptr;
100 if (mCoreThreadIsActive(m_context)) {
101 mCoreThreadContinue(m_context);
102 }
103 }
104}
105
106void DisplayGL::pauseDrawing() {
107 if (m_drawThread) {
108 m_isDrawing = false;
109 if (mCoreThreadIsActive(m_context)) {
110 mCoreThreadInterrupt(m_context);
111 }
112 QMetaObject::invokeMethod(m_painter, "pause", Qt::BlockingQueuedConnection);
113 if (mCoreThreadIsActive(m_context)) {
114 mCoreThreadContinue(m_context);
115 }
116 }
117}
118
119void DisplayGL::unpauseDrawing() {
120 if (m_drawThread) {
121 m_isDrawing = true;
122 if (mCoreThreadIsActive(m_context)) {
123 mCoreThreadInterrupt(m_context);
124 }
125 QMetaObject::invokeMethod(m_painter, "unpause", Qt::BlockingQueuedConnection);
126 if (mCoreThreadIsActive(m_context)) {
127 mCoreThreadContinue(m_context);
128 }
129 }
130}
131
132void DisplayGL::forceDraw() {
133 if (m_drawThread) {
134 QMetaObject::invokeMethod(m_painter, "forceDraw");
135 }
136}
137
138void DisplayGL::lockAspectRatio(bool lock) {
139 Display::lockAspectRatio(lock);
140 if (m_drawThread) {
141 QMetaObject::invokeMethod(m_painter, "lockAspectRatio", Q_ARG(bool, lock));
142 }
143}
144
145void DisplayGL::lockIntegerScaling(bool lock) {
146 Display::lockIntegerScaling(lock);
147 if (m_drawThread) {
148 QMetaObject::invokeMethod(m_painter, "lockIntegerScaling", Q_ARG(bool, lock));
149 }
150}
151
152void DisplayGL::filter(bool filter) {
153 Display::filter(filter);
154 if (m_drawThread) {
155 QMetaObject::invokeMethod(m_painter, "filter", Q_ARG(bool, filter));
156 }
157}
158
159void DisplayGL::framePosted(const uint32_t* buffer) {
160 if (m_drawThread && buffer) {
161 m_painter->enqueue(buffer);
162 QMetaObject::invokeMethod(m_painter, "draw");
163 }
164}
165
166void DisplayGL::setShaders(struct VDir* shaders) {
167 if (m_drawThread) {
168 QMetaObject::invokeMethod(m_painter, "setShaders", Qt::BlockingQueuedConnection, Q_ARG(struct VDir*, shaders));
169 } else {
170 m_painter->setShaders(shaders);
171 }
172}
173
174void DisplayGL::clearShaders() {
175 QMetaObject::invokeMethod(m_painter, "clearShaders");
176}
177
178void DisplayGL::resizeEvent(QResizeEvent* event) {
179 Display::resizeEvent(event);
180 resizePainter();
181}
182
183void DisplayGL::resizePainter() {
184 m_gl->resize(size());
185 if (m_drawThread) {
186 QMetaObject::invokeMethod(m_painter, "resize", Qt::BlockingQueuedConnection, Q_ARG(QSize, size()));
187 }
188}
189
190PainterGL::PainterGL(int majorVersion, QGLWidget* parent)
191 : m_gl(parent)
192 , m_active(false)
193 , m_started(false)
194 , m_context(nullptr)
195 , m_shader{}
196 , m_backend(nullptr)
197 , m_messagePainter(nullptr)
198{
199#ifdef BUILD_GL
200 mGLContext* glBackend;
201#endif
202#if !defined(_WIN32) || defined(USE_EPOXY)
203 mGLES2Context* gl2Backend;
204#endif
205
206#if !defined(_WIN32) || defined(USE_EPOXY)
207 if (majorVersion >= 2) {
208 gl2Backend = new mGLES2Context;
209 mGLES2ContextCreate(gl2Backend);
210 m_backend = &gl2Backend->d;
211 m_supportsShaders = true;
212 }
213#endif
214
215#ifdef BUILD_GL
216 if (!m_backend) {
217 glBackend = new mGLContext;
218 mGLContextCreate(glBackend);
219 m_backend = &glBackend->d;
220 m_supportsShaders = false;
221 }
222#endif
223 m_backend->swap = [](VideoBackend* v) {
224 PainterGL* painter = static_cast<PainterGL*>(v->user);
225 painter->m_gl->swapBuffers();
226 };
227
228 m_gl->makeCurrent();
229#if defined(_WIN32) && defined(USE_EPOXY)
230 epoxy_handle_external_wglMakeCurrent();
231#endif
232 m_backend->init(m_backend, reinterpret_cast<WHandle>(m_gl->winId()));
233#if !defined(_WIN32) || defined(USE_EPOXY)
234 if (m_supportsShaders) {
235 m_shader.preprocessShader = static_cast<void*>(&reinterpret_cast<mGLES2Context*>(m_backend)->initialShader);
236 }
237#endif
238 m_gl->doneCurrent();
239
240 m_backend->user = this;
241 m_backend->filter = false;
242 m_backend->lockAspectRatio = false;
243
244 for (int i = 0; i < 2; ++i) {
245 m_free.append(new uint32_t[256 * 384]);
246 }
247}
248
249PainterGL::~PainterGL() {
250 while (!m_queue.isEmpty()) {
251 delete[] m_queue.dequeue();
252 }
253 for (auto item : m_free) {
254 delete[] item;
255 }
256 m_gl->makeCurrent();
257#if defined(_WIN32) && defined(USE_EPOXY)
258 epoxy_handle_external_wglMakeCurrent();
259#endif
260#if !defined(_WIN32) || defined(USE_EPOXY)
261 if (m_shader.passes) {
262 mGLES2ShaderFree(&m_shader);
263 }
264#endif
265 m_backend->deinit(m_backend);
266 m_gl->doneCurrent();
267 delete m_backend;
268 m_backend = nullptr;
269}
270
271void PainterGL::setContext(mCoreThread* context) {
272 m_context = context;
273
274 if (!context) {
275 return;
276 }
277
278 m_gl->makeCurrent();
279#if defined(_WIN32) && defined(USE_EPOXY)
280 epoxy_handle_external_wglMakeCurrent();
281#endif
282 unsigned width, height;
283 context->core->desiredVideoDimensions(context->core, &width, &height);
284 m_backend->setDimensions(m_backend, width, height);
285 m_gl->doneCurrent();
286}
287
288void PainterGL::setMessagePainter(MessagePainter* messagePainter) {
289 m_messagePainter = messagePainter;
290}
291
292void PainterGL::resize(const QSize& size) {
293 m_size = size;
294 if (m_started && !m_active) {
295 forceDraw();
296 }
297}
298
299void PainterGL::lockAspectRatio(bool lock) {
300 m_backend->lockAspectRatio = lock;
301 if (m_started && !m_active) {
302 forceDraw();
303 }
304}
305
306void PainterGL::lockIntegerScaling(bool lock) {
307 m_backend->lockIntegerScaling = lock;
308 if (m_started && !m_active) {
309 forceDraw();
310 }
311}
312
313void PainterGL::filter(bool filter) {
314 m_backend->filter = filter;
315 if (m_started && !m_active) {
316 forceDraw();
317 }
318}
319
320void PainterGL::start() {
321 m_gl->makeCurrent();
322#if defined(_WIN32) && defined(USE_EPOXY)
323 epoxy_handle_external_wglMakeCurrent();
324#endif
325
326#if !defined(_WIN32) || defined(USE_EPOXY)
327 if (m_supportsShaders && m_shader.passes) {
328 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
329 }
330#endif
331
332 m_gl->doneCurrent();
333 m_active = true;
334 m_started = true;
335}
336
337void PainterGL::draw() {
338 if (m_queue.isEmpty() || !mCoreThreadIsActive(m_context)) {
339 return;
340 }
341
342 if (mCoreSyncWaitFrameStart(&m_context->sync) || !m_queue.isEmpty()) {
343 dequeue();
344 mCoreSyncWaitFrameEnd(&m_context->sync);
345 m_painter.begin(m_gl->context()->device());
346 performDraw();
347 m_painter.end();
348 m_backend->swap(m_backend);
349 if (!m_delayTimer.isValid()) {
350 m_delayTimer.start();
351 } else {
352 while (m_delayTimer.elapsed() < 15) {
353 QThread::usleep(100);
354 }
355 m_delayTimer.restart();
356 }
357 } else {
358 mCoreSyncWaitFrameEnd(&m_context->sync);
359 }
360 if (!m_queue.isEmpty()) {
361 QMetaObject::invokeMethod(this, "draw", Qt::QueuedConnection);
362 }
363}
364
365void PainterGL::forceDraw() {
366 m_painter.begin(m_gl->context()->device());
367 performDraw();
368 m_painter.end();
369 m_backend->swap(m_backend);
370}
371
372void PainterGL::stop() {
373 m_active = false;
374 m_started = false;
375 m_gl->makeCurrent();
376#if defined(_WIN32) && defined(USE_EPOXY)
377 epoxy_handle_external_wglMakeCurrent();
378#endif
379 dequeueAll();
380 m_backend->clear(m_backend);
381 m_backend->swap(m_backend);
382 m_gl->doneCurrent();
383 m_gl->context()->moveToThread(m_gl->thread());
384 moveToThread(m_gl->thread());
385}
386
387void PainterGL::pause() {
388 m_active = false;
389}
390
391void PainterGL::unpause() {
392 m_active = true;
393}
394
395void PainterGL::performDraw() {
396 m_painter.beginNativePainting();
397#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
398 float r = m_gl->devicePixelRatioF();
399#else
400 float r = m_gl->devicePixelRatio();
401#endif
402 m_backend->resized(m_backend, m_size.width() * r, m_size.height() * r);
403 m_backend->drawFrame(m_backend);
404 m_painter.endNativePainting();
405 if (m_messagePainter) {
406 m_messagePainter->paint(&m_painter);
407 }
408}
409
410void PainterGL::enqueue(const uint32_t* backing) {
411 m_mutex.lock();
412 uint32_t* buffer;
413 if (m_free.isEmpty()) {
414 buffer = m_queue.dequeue();
415 } else {
416 buffer = m_free.takeLast();
417 }
418 unsigned width, height;
419 m_context->core->desiredVideoDimensions(m_context->core, &width, &height);
420 memcpy(buffer, backing, width * height * BYTES_PER_PIXEL);
421 m_queue.enqueue(buffer);
422 m_mutex.unlock();
423}
424
425void PainterGL::dequeue() {
426 m_mutex.lock();
427 if (m_queue.isEmpty()) {
428 m_mutex.unlock();
429 return;
430 }
431 uint32_t* buffer = m_queue.dequeue();
432 m_backend->postFrame(m_backend, buffer);
433 m_free.append(buffer);
434 m_mutex.unlock();
435}
436
437void PainterGL::dequeueAll() {
438 uint32_t* buffer = 0;
439 m_mutex.lock();
440 while (!m_queue.isEmpty()) {
441 buffer = m_queue.dequeue();
442 m_free.append(buffer);
443 }
444 if (buffer) {
445 m_backend->postFrame(m_backend, buffer);
446 }
447 m_mutex.unlock();
448}
449
450void PainterGL::setShaders(struct VDir* dir) {
451 if (!supportsShaders()) {
452 return;
453 }
454#if !defined(_WIN32) || defined(USE_EPOXY)
455 m_gl->makeCurrent();
456#if defined(_WIN32) && defined(USE_EPOXY)
457 epoxy_handle_external_wglMakeCurrent();
458#endif
459 if (m_shader.passes) {
460 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
461 mGLES2ShaderFree(&m_shader);
462 }
463 mGLES2ShaderLoad(&m_shader, dir);
464 if (m_started) {
465 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
466 }
467 m_gl->doneCurrent();
468#endif
469}
470
471void PainterGL::clearShaders() {
472 if (!supportsShaders()) {
473 return;
474 }
475#if !defined(_WIN32) || defined(USE_EPOXY)
476 m_gl->makeCurrent();
477#if defined(_WIN32) && defined(USE_EPOXY)
478 epoxy_handle_external_wglMakeCurrent();
479#endif
480 if (m_shader.passes) {
481 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
482 mGLES2ShaderFree(&m_shader);
483 }
484 m_gl->doneCurrent();
485#endif
486}
487
488VideoShader* PainterGL::shaders() {
489 return &m_shader;
490}