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