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