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_GLES2)
9
10#include "CoreController.h"
11
12#include <QApplication>
13#include <QResizeEvent>
14#include <QTimer>
15
16#include <mgba/core/core.h>
17#include <mgba-util/math.h>
18#ifdef BUILD_GL
19#include "platform/opengl/gl.h"
20#endif
21#if !defined(_WIN32) || defined(USE_EPOXY)
22#include "platform/opengl/gles2.h"
23#ifdef _WIN32
24#include <epoxy/wgl.h>
25#endif
26#endif
27
28using namespace QGBA;
29
30DisplayGL::DisplayGL(const QGLFormat& format, QWidget* parent)
31 : Display(parent)
32 , m_gl(new EmptyGLWidget(format, this))
33{
34 m_painter = new PainterGL(format.majorVersion() < 2 ? 1 : m_gl->format().majorVersion(), m_gl);
35 m_gl->setMouseTracking(true);
36 m_gl->setAttribute(Qt::WA_TransparentForMouseEvents); // This doesn't seem to work?
37}
38
39DisplayGL::~DisplayGL() {
40 delete m_painter;
41}
42
43bool DisplayGL::supportsShaders() const {
44 return m_painter->supportsShaders();
45}
46
47VideoShader* DisplayGL::shaders() {
48 VideoShader* shaders = nullptr;
49 if (m_drawThread) {
50 QMetaObject::invokeMethod(m_painter, "shaders", Qt::BlockingQueuedConnection, Q_RETURN_ARG(VideoShader*, shaders));
51 } else {
52 shaders = m_painter->shaders();
53 }
54 return shaders;
55}
56
57void DisplayGL::startDrawing(std::shared_ptr<CoreController> controller) {
58 if (m_drawThread) {
59 return;
60 }
61 QSize dims = controller->screenDimensions();
62 setSystemDimensions(dims.width(), dims.height());
63
64 m_isDrawing = true;
65 m_painter->setContext(controller);
66 m_painter->setMessagePainter(messagePainter());
67 m_context = controller;
68 m_painter->resize(size());
69 m_gl->move(0, 0);
70 m_drawThread = new QThread(this);
71 m_drawThread->setObjectName("Painter Thread");
72 m_gl->context()->doneCurrent();
73 m_gl->context()->moveToThread(m_drawThread);
74 m_painter->moveToThread(m_drawThread);
75 connect(m_drawThread, &QThread::started, m_painter, &PainterGL::start);
76 m_drawThread->start();
77
78 lockAspectRatio(isAspectRatioLocked());
79 lockIntegerScaling(isIntegerScalingLocked());
80
81 filter(isFiltered());
82#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
83 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatioF());
84#else
85 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatio());
86#endif
87 resizePainter();
88}
89
90void DisplayGL::stopDrawing() {
91 if (m_drawThread) {
92 m_isDrawing = false;
93 CoreController::Interrupter interrupter(m_context);
94 QMetaObject::invokeMethod(m_painter, "stop", Qt::BlockingQueuedConnection);
95 m_drawThread->exit();
96 m_drawThread = nullptr;
97 }
98 m_context.reset();
99}
100
101void DisplayGL::pauseDrawing() {
102 if (m_drawThread) {
103 m_isDrawing = false;
104 CoreController::Interrupter interrupter(m_context);
105 QMetaObject::invokeMethod(m_painter, "pause", Qt::BlockingQueuedConnection);
106 }
107}
108
109void DisplayGL::unpauseDrawing() {
110 if (m_drawThread) {
111 m_isDrawing = true;
112 CoreController::Interrupter interrupter(m_context);
113 QMetaObject::invokeMethod(m_painter, "unpause", Qt::BlockingQueuedConnection);
114 }
115}
116
117void DisplayGL::forceDraw() {
118 if (m_drawThread) {
119 QMetaObject::invokeMethod(m_painter, "forceDraw");
120 }
121}
122
123void DisplayGL::lockAspectRatio(bool lock) {
124 Display::lockAspectRatio(lock);
125 if (m_drawThread) {
126 QMetaObject::invokeMethod(m_painter, "lockAspectRatio", Q_ARG(bool, lock));
127 }
128}
129
130void DisplayGL::lockIntegerScaling(bool lock) {
131 Display::lockIntegerScaling(lock);
132 if (m_drawThread) {
133 QMetaObject::invokeMethod(m_painter, "lockIntegerScaling", Q_ARG(bool, lock));
134 }
135}
136
137void DisplayGL::filter(bool filter) {
138 Display::filter(filter);
139 if (m_drawThread) {
140 QMetaObject::invokeMethod(m_painter, "filter", Q_ARG(bool, filter));
141 }
142}
143
144void DisplayGL::framePosted() {
145 if (m_drawThread) {
146 m_painter->enqueue(m_context->drawContext());
147 QMetaObject::invokeMethod(m_painter, "draw");
148 }
149}
150
151void DisplayGL::setShaders(struct VDir* shaders) {
152 if (m_drawThread) {
153 QMetaObject::invokeMethod(m_painter, "setShaders", Qt::BlockingQueuedConnection, Q_ARG(struct VDir*, shaders));
154 } else {
155 m_painter->setShaders(shaders);
156 }
157}
158
159void DisplayGL::clearShaders() {
160 QMetaObject::invokeMethod(m_painter, "clearShaders");
161}
162
163void DisplayGL::resizeEvent(QResizeEvent* event) {
164 Display::resizeEvent(event);
165 resizePainter();
166}
167
168void DisplayGL::resizePainter() {
169 m_gl->resize(size());
170 if (m_drawThread) {
171 QMetaObject::invokeMethod(m_painter, "resize", Qt::BlockingQueuedConnection, Q_ARG(QSize, size()));
172 }
173}
174
175PainterGL::PainterGL(int majorVersion, QGLWidget* parent)
176 : m_gl(parent)
177{
178#ifdef BUILD_GL
179 mGLContext* glBackend;
180#endif
181#if !defined(_WIN32) || defined(USE_EPOXY)
182 mGLES2Context* gl2Backend;
183#endif
184
185#if !defined(_WIN32) || defined(USE_EPOXY)
186 if (majorVersion >= 2) {
187 gl2Backend = new mGLES2Context;
188 mGLES2ContextCreate(gl2Backend);
189 m_backend = &gl2Backend->d;
190 m_supportsShaders = true;
191 }
192#endif
193
194#ifdef BUILD_GL
195 if (!m_backend) {
196 glBackend = new mGLContext;
197 mGLContextCreate(glBackend);
198 m_backend = &glBackend->d;
199 m_supportsShaders = false;
200 }
201#endif
202 m_backend->swap = [](VideoBackend* v) {
203 PainterGL* painter = static_cast<PainterGL*>(v->user);
204 painter->m_gl->swapBuffers();
205 };
206
207 m_gl->makeCurrent();
208#if defined(_WIN32) && defined(USE_EPOXY)
209 epoxy_handle_external_wglMakeCurrent();
210#endif
211 m_backend->init(m_backend, reinterpret_cast<WHandle>(m_gl->winId()));
212#if !defined(_WIN32) || defined(USE_EPOXY)
213 if (m_supportsShaders) {
214 m_shader.preprocessShader = static_cast<void*>(&reinterpret_cast<mGLES2Context*>(m_backend)->initialShader);
215 }
216#endif
217 m_gl->doneCurrent();
218
219 m_backend->user = this;
220 m_backend->filter = false;
221 m_backend->lockAspectRatio = false;
222
223 for (int i = 0; i < 2; ++i) {
224 m_free.append(new uint32_t[256 * 384]);
225 }
226}
227
228PainterGL::~PainterGL() {
229 while (!m_queue.isEmpty()) {
230 delete[] m_queue.dequeue();
231 }
232 for (auto item : m_free) {
233 delete[] item;
234 }
235 m_gl->makeCurrent();
236#if defined(_WIN32) && defined(USE_EPOXY)
237 epoxy_handle_external_wglMakeCurrent();
238#endif
239#if !defined(_WIN32) || defined(USE_EPOXY)
240 if (m_shader.passes) {
241 mGLES2ShaderFree(&m_shader);
242 }
243#endif
244 m_backend->deinit(m_backend);
245 m_gl->doneCurrent();
246 delete m_backend;
247 m_backend = nullptr;
248}
249
250void PainterGL::setContext(std::shared_ptr<CoreController> context) {
251 m_context = context;
252
253 if (!context) {
254 return;
255 }
256
257 m_gl->makeCurrent();
258#if defined(_WIN32) && defined(USE_EPOXY)
259 epoxy_handle_external_wglMakeCurrent();
260#endif
261 QSize size = m_context->screenDimensions();
262 m_backend->setDimensions(m_backend, size.width(), size.height());
263 m_gl->doneCurrent();
264}
265
266void PainterGL::setMessagePainter(MessagePainter* messagePainter) {
267 m_messagePainter = messagePainter;
268}
269
270void PainterGL::resize(const QSize& size) {
271 m_size = size;
272 if (m_started && !m_active) {
273 forceDraw();
274 }
275}
276
277void PainterGL::lockAspectRatio(bool lock) {
278 m_backend->lockAspectRatio = lock;
279 if (m_started && !m_active) {
280 forceDraw();
281 }
282}
283
284void PainterGL::lockIntegerScaling(bool lock) {
285 m_backend->lockIntegerScaling = lock;
286 if (m_started && !m_active) {
287 forceDraw();
288 }
289}
290
291void PainterGL::filter(bool filter) {
292 m_backend->filter = filter;
293 if (m_started && !m_active) {
294 forceDraw();
295 }
296}
297
298void PainterGL::start() {
299 m_gl->makeCurrent();
300#if defined(_WIN32) && defined(USE_EPOXY)
301 epoxy_handle_external_wglMakeCurrent();
302#endif
303
304#if !defined(_WIN32) || defined(USE_EPOXY)
305 if (m_supportsShaders && m_shader.passes) {
306 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
307 }
308#endif
309
310 m_gl->doneCurrent();
311 m_active = true;
312 m_started = true;
313}
314
315void PainterGL::draw() {
316 if (m_queue.isEmpty()) {
317 return;
318 }
319
320 if (mCoreSyncWaitFrameStart(&m_context->thread()->impl->sync) || !m_queue.isEmpty()) {
321 dequeue();
322 mCoreSyncWaitFrameEnd(&m_context->thread()->impl->sync);
323 m_painter.begin(m_gl->context()->device());
324 performDraw();
325 m_painter.end();
326 m_backend->swap(m_backend);
327 if (!m_delayTimer.isValid()) {
328 m_delayTimer.start();
329 } else {
330 while (m_delayTimer.elapsed() < 15) {
331 QThread::usleep(100);
332 }
333 m_delayTimer.restart();
334 }
335 } else {
336 mCoreSyncWaitFrameEnd(&m_context->thread()->impl->sync);
337 }
338 if (!m_queue.isEmpty()) {
339 QMetaObject::invokeMethod(this, "draw", Qt::QueuedConnection);
340 }
341}
342
343void PainterGL::forceDraw() {
344 m_painter.begin(m_gl->context()->device());
345 performDraw();
346 m_painter.end();
347 m_backend->swap(m_backend);
348}
349
350void PainterGL::stop() {
351 m_active = false;
352 m_started = false;
353 m_gl->makeCurrent();
354#if defined(_WIN32) && defined(USE_EPOXY)
355 epoxy_handle_external_wglMakeCurrent();
356#endif
357 dequeueAll();
358 m_backend->clear(m_backend);
359 m_backend->swap(m_backend);
360 m_gl->doneCurrent();
361 m_gl->context()->moveToThread(m_gl->thread());
362 m_context.reset();
363 moveToThread(m_gl->thread());
364}
365
366void PainterGL::pause() {
367 m_active = false;
368}
369
370void PainterGL::unpause() {
371 m_active = true;
372}
373
374void PainterGL::performDraw() {
375 m_painter.beginNativePainting();
376#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
377 float r = m_gl->devicePixelRatioF();
378#else
379 float r = m_gl->devicePixelRatio();
380#endif
381 m_backend->resized(m_backend, m_size.width() * r, m_size.height() * r);
382 m_backend->drawFrame(m_backend);
383 m_painter.endNativePainting();
384 if (m_messagePainter) {
385 m_messagePainter->paint(&m_painter);
386 }
387}
388
389void PainterGL::enqueue(const uint32_t* backing) {
390 m_mutex.lock();
391 uint32_t* buffer;
392 if (m_free.isEmpty()) {
393 buffer = m_queue.dequeue();
394 } else {
395 buffer = m_free.takeLast();
396 }
397 QSize size = m_context->screenDimensions();
398 memcpy(buffer, backing, size.width() * size.height() * BYTES_PER_PIXEL);
399 m_queue.enqueue(buffer);
400 m_mutex.unlock();
401}
402
403void PainterGL::dequeue() {
404 m_mutex.lock();
405 if (m_queue.isEmpty()) {
406 m_mutex.unlock();
407 return;
408 }
409 uint32_t* buffer = m_queue.dequeue();
410 m_backend->postFrame(m_backend, buffer);
411 m_free.append(buffer);
412 m_mutex.unlock();
413}
414
415void PainterGL::dequeueAll() {
416 uint32_t* buffer = 0;
417 m_mutex.lock();
418 while (!m_queue.isEmpty()) {
419 buffer = m_queue.dequeue();
420 m_free.append(buffer);
421 }
422 if (buffer) {
423 m_backend->postFrame(m_backend, buffer);
424 }
425 m_mutex.unlock();
426}
427
428void PainterGL::setShaders(struct VDir* dir) {
429 if (!supportsShaders()) {
430 return;
431 }
432#if !defined(_WIN32) || defined(USE_EPOXY)
433 m_gl->makeCurrent();
434#if defined(_WIN32) && defined(USE_EPOXY)
435 epoxy_handle_external_wglMakeCurrent();
436#endif
437 if (m_shader.passes) {
438 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
439 mGLES2ShaderFree(&m_shader);
440 }
441 mGLES2ShaderLoad(&m_shader, dir);
442 if (m_started) {
443 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
444 }
445 m_gl->doneCurrent();
446#endif
447}
448
449void PainterGL::clearShaders() {
450 if (!supportsShaders()) {
451 return;
452 }
453#if !defined(_WIN32) || defined(USE_EPOXY)
454 m_gl->makeCurrent();
455#if defined(_WIN32) && defined(USE_EPOXY)
456 epoxy_handle_external_wglMakeCurrent();
457#endif
458 if (m_shader.passes) {
459 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
460 mGLES2ShaderFree(&m_shader);
461 }
462 m_gl->doneCurrent();
463#endif
464}
465
466VideoShader* PainterGL::shaders() {
467 return &m_shader;
468}
469
470#endif