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 "gba/supervisor/thread.h"
13
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, bool force1, 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 QGLFormat::OpenGLVersionFlags versions = QGLFormat::openGLVersionFlags();
35 if (force1) {
36 versions &= QGLFormat::OpenGL_Version_1_1 |
37 QGLFormat::OpenGL_Version_1_2 |
38 QGLFormat::OpenGL_Version_1_3 |
39 QGLFormat::OpenGL_Version_1_4 |
40 QGLFormat::OpenGL_Version_1_5;
41 }
42 m_painter = new PainterGL(m_gl, versions);
43 m_gl->setMouseTracking(true);
44 m_gl->setAttribute(Qt::WA_TransparentForMouseEvents); // This doesn't seem to work?
45}
46
47DisplayGL::~DisplayGL() {
48 delete m_painter;
49}
50
51bool DisplayGL::supportsShaders() const {
52 return m_painter->supportsShaders();
53}
54
55VideoShader* DisplayGL::shaders() {
56 VideoShader* shaders = nullptr;
57 if (m_drawThread) {
58 QMetaObject::invokeMethod(m_painter, "shaders", Qt::BlockingQueuedConnection, Q_RETURN_ARG(VideoShader*, shaders));
59 } else {
60 shaders = m_painter->shaders();
61 }
62 return shaders;
63}
64
65void DisplayGL::startDrawing(mCoreThread* thread) {
66 if (m_drawThread) {
67 return;
68 }
69 m_isDrawing = true;
70 m_painter->setContext(thread);
71 m_painter->setMessagePainter(messagePainter());
72 m_context = thread;
73 m_painter->resize(size());
74 m_gl->move(0, 0);
75 m_drawThread = new QThread(this);
76 m_drawThread->setObjectName("Painter Thread");
77 m_gl->context()->doneCurrent();
78 m_gl->context()->moveToThread(m_drawThread);
79 m_painter->moveToThread(m_drawThread);
80 connect(m_drawThread, SIGNAL(started()), m_painter, SLOT(start()));
81 m_drawThread->start();
82 mCoreSyncSetVideoSync(&m_context->sync, false);
83
84 lockAspectRatio(isAspectRatioLocked());
85 filter(isFiltered());
86 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatio());
87 resizePainter();
88}
89
90void DisplayGL::stopDrawing() {
91 if (m_drawThread) {
92 m_isDrawing = false;
93 if (mCoreThreadIsActive(m_context)) {
94 mCoreThreadInterrupt(m_context);
95 }
96 QMetaObject::invokeMethod(m_painter, "stop", Qt::BlockingQueuedConnection);
97 m_drawThread->exit();
98 m_drawThread = nullptr;
99 if (mCoreThreadIsActive(m_context)) {
100 mCoreThreadContinue(m_context);
101 }
102 }
103}
104
105void DisplayGL::pauseDrawing() {
106 if (m_drawThread) {
107 m_isDrawing = false;
108 if (mCoreThreadIsActive(m_context)) {
109 mCoreThreadInterrupt(m_context);
110 }
111 QMetaObject::invokeMethod(m_painter, "pause", Qt::BlockingQueuedConnection);
112 if (mCoreThreadIsActive(m_context)) {
113 mCoreThreadContinue(m_context);
114 }
115 }
116}
117
118void DisplayGL::unpauseDrawing() {
119 if (m_drawThread) {
120 m_isDrawing = true;
121 if (mCoreThreadIsActive(m_context)) {
122 mCoreThreadInterrupt(m_context);
123 }
124 QMetaObject::invokeMethod(m_painter, "unpause", Qt::BlockingQueuedConnection);
125 if (mCoreThreadIsActive(m_context)) {
126 mCoreThreadContinue(m_context);
127 }
128 }
129}
130
131void DisplayGL::forceDraw() {
132 if (m_drawThread) {
133 QMetaObject::invokeMethod(m_painter, "forceDraw");
134 }
135}
136
137void DisplayGL::lockAspectRatio(bool lock) {
138 Display::lockAspectRatio(lock);
139 if (m_drawThread) {
140 QMetaObject::invokeMethod(m_painter, "lockAspectRatio", Q_ARG(bool, lock));
141 }
142}
143
144void DisplayGL::filter(bool filter) {
145 Display::filter(filter);
146 if (m_drawThread) {
147 QMetaObject::invokeMethod(m_painter, "filter", Q_ARG(bool, filter));
148 }
149}
150
151void DisplayGL::framePosted(const uint32_t* buffer) {
152 if (m_drawThread && buffer) {
153 m_painter->enqueue(buffer);
154 QMetaObject::invokeMethod(m_painter, "draw");
155 }
156}
157
158void DisplayGL::setShaders(struct VDir* shaders) {
159 if (m_drawThread) {
160 QMetaObject::invokeMethod(m_painter, "setShaders", Qt::BlockingQueuedConnection, Q_ARG(struct VDir*, shaders));
161 } else {
162 m_painter->setShaders(shaders);
163 }
164}
165
166void DisplayGL::clearShaders() {
167 QMetaObject::invokeMethod(m_painter, "clearShaders");
168}
169
170void DisplayGL::resizeEvent(QResizeEvent* event) {
171 Display::resizeEvent(event);
172 resizePainter();
173}
174
175void DisplayGL::resizePainter() {
176 m_gl->resize(size());
177 if (m_drawThread) {
178 QMetaObject::invokeMethod(m_painter, "resize", Qt::BlockingQueuedConnection, Q_ARG(QSize, size()));
179 }
180}
181
182PainterGL::PainterGL(QGLWidget* parent, QGLFormat::OpenGLVersionFlags glVersion)
183 : m_gl(parent)
184 , m_active(false)
185 , m_started(false)
186 , m_context(nullptr)
187 , m_shader{}
188 , m_backend(nullptr)
189 , m_messagePainter(nullptr)
190{
191#ifdef BUILD_GL
192 GBAGLContext* glBackend;
193#endif
194#if !defined(_WIN32) || defined(USE_EPOXY)
195 GBAGLES2Context* gl2Backend;
196#endif
197
198#if !defined(_WIN32) || defined(USE_EPOXY)
199 if (glVersion & (QGLFormat::OpenGL_Version_3_0 | QGLFormat::OpenGL_ES_Version_2_0)) {
200 gl2Backend = new GBAGLES2Context;
201 GBAGLES2ContextCreate(gl2Backend);
202 m_backend = &gl2Backend->d;
203 m_supportsShaders = true;
204 }
205#endif
206
207#ifdef BUILD_GL
208 if (!m_backend) {
209 glBackend = new GBAGLContext;
210 GBAGLContextCreate(glBackend);
211 m_backend = &glBackend->d;
212 m_supportsShaders = false;
213 }
214#endif
215 m_backend->swap = [](VideoBackend* v) {
216 PainterGL* painter = static_cast<PainterGL*>(v->user);
217 painter->m_gl->swapBuffers();
218 };
219
220 m_gl->makeCurrent();
221#if defined(_WIN32) && defined(USE_EPOXY)
222 epoxy_handle_external_wglMakeCurrent();
223#endif
224 m_backend->init(m_backend, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, reinterpret_cast<WHandle>(m_gl->winId()));
225#if !defined(_WIN32) || defined(USE_EPOXY)
226 if (m_supportsShaders) {
227 m_shader.preprocessShader = static_cast<void*>(&reinterpret_cast<GBAGLES2Context*>(m_backend)->initialShader);
228 }
229#endif
230 m_gl->doneCurrent();
231
232 m_backend->user = this;
233 m_backend->filter = false;
234 m_backend->lockAspectRatio = false;
235
236 for (int i = 0; i < 2; ++i) {
237 m_free.append(new uint32_t[256 * 256]);
238 }
239}
240
241PainterGL::~PainterGL() {
242 while (!m_queue.isEmpty()) {
243 delete[] m_queue.dequeue();
244 }
245 for (auto item : m_free) {
246 delete[] item;
247 }
248 m_gl->makeCurrent();
249#if defined(_WIN32) && defined(USE_EPOXY)
250 epoxy_handle_external_wglMakeCurrent();
251#endif
252#if !defined(_WIN32) || defined(USE_EPOXY)
253 if (m_shader.passes) {
254 GBAGLES2ShaderFree(&m_shader);
255 }
256#endif
257 m_backend->deinit(m_backend);
258 m_gl->doneCurrent();
259 delete m_backend;
260 m_backend = nullptr;
261}
262
263void PainterGL::setContext(mCoreThread* context) {
264 m_context = context;
265}
266
267void PainterGL::setMessagePainter(MessagePainter* messagePainter) {
268 m_messagePainter = messagePainter;
269}
270
271void PainterGL::resize(const QSize& size) {
272 m_size = size;
273 if (m_started && !m_active) {
274 forceDraw();
275 }
276}
277
278void PainterGL::lockAspectRatio(bool lock) {
279 m_backend->lockAspectRatio = lock;
280 if (m_started && !m_active) {
281 forceDraw();
282 }
283}
284
285void PainterGL::filter(bool filter) {
286 m_backend->filter = filter;
287 if (m_started && !m_active) {
288 forceDraw();
289 }
290}
291
292void PainterGL::start() {
293 m_gl->makeCurrent();
294#if defined(_WIN32) && defined(USE_EPOXY)
295 epoxy_handle_external_wglMakeCurrent();
296#endif
297
298#if !defined(_WIN32) || defined(USE_EPOXY)
299 if (m_supportsShaders && m_shader.passes) {
300 GBAGLES2ShaderAttach(reinterpret_cast<GBAGLES2Context*>(m_backend), static_cast<GBAGLES2Shader*>(m_shader.passes), m_shader.nPasses);
301 }
302#endif
303
304 m_gl->doneCurrent();
305 m_active = true;
306 m_started = true;
307}
308
309void PainterGL::draw() {
310 if (m_queue.isEmpty() || !mCoreThreadIsActive(m_context)) {
311 return;
312 }
313 if (mCoreSyncWaitFrameStart(&m_context->sync) || !m_queue.isEmpty()) {
314 dequeue();
315 mCoreSyncWaitFrameEnd(&m_context->sync);
316 m_painter.begin(m_gl->context()->device());
317 performDraw();
318 m_painter.end();
319 m_backend->swap(m_backend);
320 } else {
321 mCoreSyncWaitFrameEnd(&m_context->sync);
322 }
323 if (!m_queue.isEmpty()) {
324 QMetaObject::invokeMethod(this, "draw", Qt::QueuedConnection);
325 }
326}
327
328void PainterGL::forceDraw() {
329 m_painter.begin(m_gl->context()->device());
330 performDraw();
331 m_painter.end();
332 m_backend->swap(m_backend);
333}
334
335void PainterGL::stop() {
336 m_active = false;
337 m_started = false;
338 m_gl->makeCurrent();
339#if defined(_WIN32) && defined(USE_EPOXY)
340 epoxy_handle_external_wglMakeCurrent();
341#endif
342 dequeueAll();
343 m_backend->clear(m_backend);
344 m_backend->swap(m_backend);
345 m_gl->doneCurrent();
346 m_gl->context()->moveToThread(m_gl->thread());
347 moveToThread(m_gl->thread());
348}
349
350void PainterGL::pause() {
351 m_active = false;
352}
353
354void PainterGL::unpause() {
355 m_active = true;
356}
357
358void PainterGL::performDraw() {
359 m_painter.beginNativePainting();
360 float r = m_gl->devicePixelRatio();
361 m_backend->resized(m_backend, m_size.width() * r, m_size.height() * r);
362 m_backend->drawFrame(m_backend);
363 m_painter.endNativePainting();
364 if (m_messagePainter) {
365 m_messagePainter->paint(&m_painter);
366 }
367}
368
369void PainterGL::enqueue(const uint32_t* backing) {
370 m_mutex.lock();
371 uint32_t* buffer;
372 if (m_free.isEmpty()) {
373 buffer = m_queue.dequeue();
374 } else {
375 buffer = m_free.takeLast();
376 }
377 memcpy(buffer, backing, VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * BYTES_PER_PIXEL);
378 m_queue.enqueue(buffer);
379 m_mutex.unlock();
380}
381
382void PainterGL::dequeue() {
383 m_mutex.lock();
384 if (m_queue.isEmpty()) {
385 m_mutex.unlock();
386 return;
387 }
388 uint32_t* buffer = m_queue.dequeue();
389 m_backend->postFrame(m_backend, buffer);
390 m_free.append(buffer);
391 m_mutex.unlock();
392}
393
394void PainterGL::dequeueAll() {
395 uint32_t* buffer = 0;
396 m_mutex.lock();
397 while (!m_queue.isEmpty()) {
398 buffer = m_queue.dequeue();
399 m_free.append(buffer);
400 }
401 if (buffer) {
402 m_backend->postFrame(m_backend, buffer);
403 }
404 m_mutex.unlock();
405}
406
407void PainterGL::setShaders(struct VDir* dir) {
408 if (!supportsShaders()) {
409 return;
410 }
411#if !defined(_WIN32) || defined(USE_EPOXY)
412 m_gl->makeCurrent();
413#if defined(_WIN32) && defined(USE_EPOXY)
414 epoxy_handle_external_wglMakeCurrent();
415#endif
416 if (m_shader.passes) {
417 GBAGLES2ShaderDetach(reinterpret_cast<GBAGLES2Context*>(m_backend));
418 GBAGLES2ShaderFree(&m_shader);
419 }
420 GBAGLES2ShaderLoad(&m_shader, dir);
421 if (m_started) {
422 GBAGLES2ShaderAttach(reinterpret_cast<GBAGLES2Context*>(m_backend), static_cast<GBAGLES2Shader*>(m_shader.passes), m_shader.nPasses);
423 }
424 m_gl->doneCurrent();
425#endif
426}
427
428void PainterGL::clearShaders() {
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 GBAGLES2ShaderDetach(reinterpret_cast<GBAGLES2Context*>(m_backend));
439 GBAGLES2ShaderFree(&m_shader);
440 }
441 m_gl->doneCurrent();
442#endif
443}
444
445VideoShader* PainterGL::shaders() {
446 return &m_shader;
447}