void QGLWidgetPrivate::recreateEglSurface()
{
Q_Q(QGLWidget);
WId currentId = q->winId();
if (glcx->d_func()->eglSurface != EGL_NO_SURFACE) {
if (glcx == QGLContext::currentContext())
glcx->doneCurrent();
eglDestroySurface(glcx->d_func()->eglContext->display(),
glcx->d_func()->eglSurface);
}
glcx->d_func()->eglSurface = QEgl::createSurface(glcx->device(),
glcx->d_func()->eglContext->config());
#if !defined(QGL_NO_PRESERVED_SWAP)
eglGetError(); // Clear error state first.
eglSurfaceAttrib(QEgl::display(), glcx->d_func()->eglSurface,
EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
if (eglGetError() != EGL_SUCCESS) {
qWarning("QGLContext: could not enable preserved swap");
}
#endif
eglSurfaceWindowId = currentId;
}
static jboolean android_view_HardwareRenderer_preserveBackBuffer(JNIEnv* env, jobject clazz) {
EGLDisplay display = eglGetCurrentDisplay();
EGLSurface surface = eglGetCurrentSurface(EGL_DRAW);
eglGetError();
eglSurfaceAttrib(display, surface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
EGLint error = eglGetError();
if (error != EGL_SUCCESS) {
RENDERER_LOGD("Could not enable buffer preserved swap behavior (%x)", error);
}
return error == EGL_SUCCESS;
}
/* EGLBoolean eglSurfaceAttrib ( EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value ) */
static jboolean
android_eglSurfaceAttrib
(JNIEnv *_env, jobject _this, jobject dpy, jobject surface, jint attribute, jint value) {
EGLBoolean _returnValue = (EGLBoolean) 0;
EGLDisplay dpy_native = (EGLDisplay) fromEGLHandle(_env, egldisplayGetHandleID, dpy);
EGLSurface surface_native = (EGLSurface) fromEGLHandle(_env, eglsurfaceGetHandleID, surface);
_returnValue = eglSurfaceAttrib(
(EGLDisplay)dpy_native,
(EGLSurface)surface_native,
(EGLint)attribute,
(EGLint)value
);
return (jboolean)_returnValue;
}
void InitializeSurface(DisplaySurface *surface, unsigned int xOrigin, unsigned int yOrigin, unsigned int width, unsigned int height) {
//VC
VC_RECT_T destinationRect;
VC_RECT_T sourceRect;
if (xOrigin > displayWidth) xOrigin = 0;
if (yOrigin > displayHeight) yOrigin = 0;
if (width == 0 || xOrigin + width > displayWidth) width = displayWidth - xOrigin;
if (height == 0 || yOrigin + height > displayHeight) height = displayHeight - yOrigin;
surface->xOrigin = xOrigin;
surface->yOrigin = yOrigin;
surface->width = width;
surface->height = height;
// create an EGL window surface
destinationRect.x = xOrigin;
destinationRect.y = displayHeight - yOrigin - height;
destinationRect.width = width;
destinationRect.height = height;
sourceRect.x = 0;
sourceRect.y = 0;
sourceRect.width = width << 16;
sourceRect.height = height << 16;
dispmanDisplay = vc_dispmanx_display_open( 0 /* LCD */);
dispmanUpdate = vc_dispmanx_update_start( 0 );
surface->dispmanWindow.element = vc_dispmanx_element_add (dispmanUpdate, dispmanDisplay, 0/*layer*/, &destinationRect, 0/*src*/, &sourceRect, DISPMANX_PROTECTION_NONE, 0 /*alpha*/, 0/*clamp*/, 0/*transform*/);
surface->dispmanWindow.width = width;
surface->dispmanWindow.height = height;
vc_dispmanx_update_submit_sync(dispmanUpdate);
// create the surfrace
surface->eglSurface = eglCreateWindowSurface(eglDisplay, eglConfig, &surface->dispmanWindow, NULL );
// connect the context to the surface
eglMakeCurrent(eglDisplay, surface->eglSurface, surface->eglSurface, eglContext);
// JDO: preserve buffer https://www.khronos.org/registry/egl/sdk/docs/man/html/eglSwapBuffers.xhtml
// Slower eglSwapBuffers but allows for partial screen update
eglSurfaceAttrib(eglDisplay, surface->eglSurface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
}
/* private native int _eglSurfaceAttrib ( int display , int surface , int attribute , int value ) ; */
KNIEXPORT KNI_RETURNTYPE_INT
Java_javax_microedition_khronos_egl_EGL10Impl__1eglSurfaceAttrib() {
jint display = KNI_GetParameterAsInt(1);
jint surface = KNI_GetParameterAsInt(2);
jint attribute = KNI_GetParameterAsInt(3);
jint value = KNI_GetParameterAsInt(4);
jint returnValue = (jint)eglSurfaceAttrib((EGLDisplay)display,
(EGLSurface)surface,
(EGLint)attribute,
(EGLint)value);
#ifdef DEBUG
printf("eglSurfaceAttrib(0x%x, 0x%x, %d, %d) = %d\n",
display, surface, attribute, value, returnValue);
#endif
KNI_ReturnInt(returnValue);
}
bool CGLContextEGL::SurfaceAttrib()
{
// for the non-trivial dirty region modes, we need the EGL buffer to be preserved across updates
if (g_advancedSettings.m_guiAlgorithmDirtyRegions == DIRTYREGION_SOLVER_COST_REDUCTION ||
g_advancedSettings.m_guiAlgorithmDirtyRegions == DIRTYREGION_SOLVER_UNION)
{
if ((m_eglDisplay == EGL_NO_DISPLAY) || (m_eglSurface == EGL_NO_SURFACE))
{
return false;
}
if (!eglSurfaceAttrib(m_eglDisplay, m_eglSurface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED))
{
CLog::Log(LOGDEBUG, "%s: Could not set EGL_SWAP_BEHAVIOR",__FUNCTION__);
}
}
return true;
}
bool EglManager::setPreserveBuffer(EGLSurface surface, bool preserve) {
if (mSwapBehavior != SwapBehavior::Preserved) return false;
bool preserved = eglSurfaceAttrib(mEglDisplay, surface, EGL_SWAP_BEHAVIOR,
preserve ? EGL_BUFFER_PRESERVED : EGL_BUFFER_DESTROYED);
if (!preserved) {
ALOGW("Failed to set EGL_SWAP_BEHAVIOR on surface %p, error=%s", (void*)surface,
eglErrorString());
// Maybe it's already set?
EGLint swapBehavior;
if (eglQuerySurface(mEglDisplay, surface, EGL_SWAP_BEHAVIOR, &swapBehavior)) {
preserved = (swapBehavior == EGL_BUFFER_PRESERVED);
} else {
ALOGW("Failed to query EGL_SWAP_BEHAVIOR on surface %p, error=%p", (void*)surface,
eglErrorString());
}
}
return preserved;
}
bool EglManager::enableDirtyRegions(EGLSurface surface) {
if (!mRequestDirtyRegions) return false;
if (mCanSetDirtyRegions) {
EGLBoolean success;
TIME_LOG("eglSurfaceAttrib", success = eglSurfaceAttrib(mEglDisplay, surface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED));
if (!success) {
ALOGW("Failed to set EGL_SWAP_BEHAVIOR on surface %p, error=%s",
(void*) surface, egl_error_str());
return false;
}
return true;
}
// Perhaps it is already enabled?
EGLint value;
EGLBoolean success;
TIME_LOG("eglQuerySurface", success = eglQuerySurface(mEglDisplay, surface, EGL_SWAP_BEHAVIOR, &value));
if (!success) {
ALOGW("Failed to query EGL_SWAP_BEHAVIOR on surface %p, error=%p",
(void*) surface, egl_error_str());
return false;
}
return value == EGL_BUFFER_PRESERVED;
}
bool CEGLWrapper::SurfaceAttrib(EGLDisplay display, EGLSurface surface, EGLint attribute, EGLint value)
{
if ((display == EGL_NO_DISPLAY) || (surface == EGL_NO_SURFACE))
return false;
return eglSurfaceAttrib(display, surface, attribute, value);
}
JNIEXPORT jboolean JNICALL Java_org_lwjgl_opengles_EGL_neglSurfaceAttrib(JNIEnv *env, jclass clazz, jlong dpy_ptr, jlong surface_ptr, jint attribute, jint value) {
EGLDisplay dpy = (EGLDisplay)(intptr_t)dpy_ptr;
EGLSurface surface = (EGLSurface)(intptr_t)surface_ptr;
return eglSurfaceAttrib(dpy, surface, attribute, value);
}
QEglContext *QVGEGLWindowSurfaceDirect::ensureContext(QWidget *widget)
{
QSize newSize = windowSurfaceSize(widget);
QEglProperties surfaceProps;
#if defined(QVG_RECREATE_ON_SIZE_CHANGE)
#if !defined(QVG_NO_SINGLE_CONTEXT)
if (context && size != newSize) {
// The surface size has changed, so we need to recreate it.
// We can keep the same context and paint engine.
size = newSize;
if (isPaintingActive)
context->doneCurrent();
context->destroySurface(windowSurface);
#if defined(EGL_VG_ALPHA_FORMAT_PRE_BIT)
if (isPremultipliedContext(context)) {
surfaceProps.setValue
(EGL_VG_ALPHA_FORMAT, EGL_VG_ALPHA_FORMAT_PRE);
} else {
surfaceProps.removeValue(EGL_VG_ALPHA_FORMAT);
}
#endif
windowSurface = context->createSurface(widget, &surfaceProps);
isPaintingActive = false;
needToSwap = true;
}
#else
if (context && size != newSize) {
// The surface size has changed, so we need to recreate
// the EGL context for the widget. We also need to recreate
// the surface's paint engine if context sharing is not
// enabled because we cannot reuse the existing paint objects
// in the new context.
qt_vg_destroy_paint_engine(engine);
engine = 0;
context->destroySurface(windowSurface);
qt_vg_destroy_context(context, QInternal::Widget);
context = 0;
windowSurface = EGL_NO_SURFACE;
}
#endif
#endif
if (!context) {
// Create a new EGL context and bind it to the widget surface.
size = newSize;
context = qt_vg_create_context(widget, QInternal::Widget);
if (!context)
return 0;
// We want a direct to window rendering surface if possible.
#if defined(QVG_DIRECT_TO_WINDOW)
surfaceProps.setValue(EGL_RENDER_BUFFER, EGL_SINGLE_BUFFER);
#endif
#if defined(EGL_VG_ALPHA_FORMAT_PRE_BIT)
if (isPremultipliedContext(context)) {
surfaceProps.setValue
(EGL_VG_ALPHA_FORMAT, EGL_VG_ALPHA_FORMAT_PRE);
} else {
surfaceProps.removeValue(EGL_VG_ALPHA_FORMAT);
}
#endif
EGLSurface surface = context->createSurface(widget, &surfaceProps);
if (surface == EGL_NO_SURFACE) {
qt_vg_destroy_context(context, QInternal::Widget);
context = 0;
return 0;
}
needToSwap = true;
#if defined(QVG_DIRECT_TO_WINDOW)
// Did we get a direct to window rendering surface?
EGLint buffer = 0;
if (eglQueryContext(QEgl::display(), context->context(),
EGL_RENDER_BUFFER, &buffer) &&
buffer == EGL_SINGLE_BUFFER) {
needToSwap = false;
}
#endif
windowSurface = surface;
isPaintingActive = false;
}
#if !defined(QVG_NO_PRESERVED_SWAP)
// Try to force the surface back buffer to preserve its contents.
if (needToSwap) {
eglGetError(); // Clear error state first.
eglSurfaceAttrib(QEgl::display(), windowSurface,
EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
if (eglGetError() != EGL_SUCCESS) {
qWarning("QVG: could not enable preserved swap");
}
}
#endif
return context;
}
// Chooses the EGL config and creates the EGL context
bool QGLContext::chooseContext(const QGLContext* shareContext) // almost same as in qgl_x11egl.cpp
{
Q_D(QGLContext);
if (!device())
return false;
int devType = device()->devType();
if ((devType != QInternal::Widget) && (devType != QInternal::Pbuffer)) {
qWarning("WARNING: Creating a QGLContext not supported on device type %d", devType);
return false;
}
// Get the display and initialize it.
if (d->eglContext == 0) {
d->eglContext = new QEglContext();
d->ownsEglContext = true;
d->eglContext->setApi(QEgl::OpenGL);
if (d->glFormat.samples() == EGL_DONT_CARE) {
// Allow apps to override ability to use multisampling by setting an environment variable. Eg:
// qputenv("QT_SYMBIAN_DISABLE_GL_MULTISAMPLE", "1");
// Added to allow camera app to start with limited memory.
if (!QSymbianGraphicsSystemEx::hasBCM2727() && !qgetenv("QT_SYMBIAN_DISABLE_GL_MULTISAMPLE").toInt()) {
// Most likely we have hw support for multisampling
// so let's enable it.
d->glFormat.setSampleBuffers(1);
d->glFormat.setSamples(4);
} else {
d->glFormat.setSampleBuffers(0);
d->glFormat.setSamples(0);
}
}
// If the device is a widget with WA_TranslucentBackground set, make sure the glFormat
// has the alpha channel option set:
if (devType == QInternal::Widget) {
QWidget* widget = static_cast<QWidget*>(device());
if (widget->testAttribute(Qt::WA_TranslucentBackground))
d->glFormat.setAlpha(true);
}
// Construct the configuration we need for this surface.
QEglProperties configProps;
configProps.setDeviceType(devType);
configProps.setPaintDeviceFormat(device());
configProps.setRenderableType(QEgl::OpenGL);
configProps.setValue(EGL_SURFACE_TYPE, EGL_WINDOW_BIT|EGL_SWAP_BEHAVIOR_PRESERVED_BIT);
qt_eglproperties_set_glformat(configProps, d->glFormat);
if (!d->eglContext->chooseConfig(configProps, QEgl::BestPixelFormat)) {
delete d->eglContext;
d->eglContext = 0;
return false;
}
// Create a new context for the configuration.
QEglContext* eglSharedContext = shareContext ? shareContext->d_func()->eglContext : 0;
if (!d->eglContext->createContext(eglSharedContext)) {
delete d->eglContext;
d->eglContext = 0;
return false;
}
d->sharing = d->eglContext->isSharing();
if (d->sharing && shareContext)
const_cast<QGLContext *>(shareContext)->d_func()->sharing = true;
}
// Inform the higher layers about the actual format properties
qt_glformat_from_eglconfig(d->glFormat, d->eglContext->config());
// Do don't create the EGLSurface for everything.
// QWidget - yes, create the EGLSurface and store it in QGLContextPrivate::eglSurface
// QGLWidget - yes, create the EGLSurface and store it in QGLContextPrivate::eglSurface
// QGLPixelBuffer - no, it creates the surface itself and stores it in QGLPixelBufferPrivate::pbuf
if (devType == QInternal::Widget) {
if (d->eglSurface != EGL_NO_SURFACE)
eglDestroySurface(d->eglContext->display(), d->eglSurface);
d->eglSurface = QEgl::createSurface(device(), d->eglContext->config());
eglGetError(); // Clear error state first.
#ifdef QGL_NO_PRESERVED_SWAP
eglSurfaceAttrib(QEgl::display(), d->eglSurface,
EGL_SWAP_BEHAVIOR, EGL_BUFFER_DESTROYED);
if (eglGetError() != EGL_SUCCESS)
qWarning("QGLContext: could not enable destroyed swap behaviour");
#else
eglSurfaceAttrib(QEgl::display(), d->eglSurface,
EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
if (eglGetError() != EGL_SUCCESS)
qWarning("QGLContext: could not enable preserved swap behaviour");
#endif
setWindowCreated(true);
}
return true;
}
void EglOnXBackend::init()
{
if (!initRenderingContext()) {
setFailed(QStringLiteral("Could not initialize rendering context"));
return;
}
initEGL();
if (!hasGLExtension(QStringLiteral("EGL_KHR_image")) &&
(!hasGLExtension(QStringLiteral("EGL_KHR_image_base")) ||
!hasGLExtension(QStringLiteral("EGL_KHR_image_pixmap")))) {
setFailed(QStringLiteral("Required support for binding pixmaps to EGLImages not found, disabling compositing"));
return;
}
GLPlatform *glPlatform = GLPlatform::instance();
glPlatform->detect(EglPlatformInterface);
if (GLPlatform::instance()->driver() == Driver_Intel)
options->setUnredirectFullscreen(false); // bug #252817
options->setGlPreferBufferSwap(options->glPreferBufferSwap()); // resolve autosetting
if (options->glPreferBufferSwap() == Options::AutoSwapStrategy)
options->setGlPreferBufferSwap('e'); // for unknown drivers - should not happen
glPlatform->printResults();
initGL(EglPlatformInterface);
if (!hasGLExtension(QStringLiteral("GL_OES_EGL_image"))) {
setFailed(QStringLiteral("Required extension GL_OES_EGL_image not found, disabling compositing"));
return;
}
// check for EGL_NV_post_sub_buffer and whether it can be used on the surface
if (eglPostSubBufferNV) {
if (eglQuerySurface(dpy, surface, EGL_POST_SUB_BUFFER_SUPPORTED_NV, &surfaceHasSubPost) == EGL_FALSE) {
EGLint error = eglGetError();
if (error != EGL_SUCCESS && error != EGL_BAD_ATTRIBUTE) {
setFailed(QStringLiteral("query surface failed"));
return;
} else {
surfaceHasSubPost = EGL_FALSE;
}
}
}
setSupportsBufferAge(false);
if (hasGLExtension("EGL_EXT_buffer_age")) {
const QByteArray useBufferAge = qgetenv("KWIN_USE_BUFFER_AGE");
if (useBufferAge != "0")
setSupportsBufferAge(true);
}
setSyncsToVBlank(false);
setBlocksForRetrace(false);
gs_tripleBufferNeedsDetection = false;
m_swapProfiler.init();
if (surfaceHasSubPost) {
qDebug() << "EGL implementation and surface support eglPostSubBufferNV, let's use it";
if (options->glPreferBufferSwap() != Options::NoSwapEncourage) {
// check if swap interval 1 is supported
EGLint val;
eglGetConfigAttrib(dpy, config, EGL_MAX_SWAP_INTERVAL, &val);
if (val >= 1) {
if (eglSwapInterval(dpy, 1)) {
qDebug() << "Enabled v-sync";
setSyncsToVBlank(true);
const QByteArray tripleBuffer = qgetenv("KWIN_TRIPLE_BUFFER");
if (!tripleBuffer.isEmpty()) {
setBlocksForRetrace(qstrcmp(tripleBuffer, "0") == 0);
gs_tripleBufferUndetected = false;
}
gs_tripleBufferNeedsDetection = gs_tripleBufferUndetected;
}
} else {
qWarning() << "Cannot enable v-sync as max. swap interval is" << val;
}
} else {
// disable v-sync
eglSwapInterval(dpy, 0);
}
} else {
/* In the GLX backend, we fall back to using glCopyPixels if we have no extension providing support for partial screen updates.
* However, that does not work in EGL - glCopyPixels with glDrawBuffer(GL_FRONT); does nothing.
* Hence we need EGL to preserve the backbuffer for us, so that we can draw the partial updates on it and call
* eglSwapBuffers() for each frame. eglSwapBuffers() then does the copy (no page flip possible in this mode),
* which means it is slow and not synced to the v-blank. */
qWarning() << "eglPostSubBufferNV not supported, have to enable buffer preservation - which breaks v-sync and performance";
eglSurfaceAttrib(dpy, surface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
}
}
void showRenderBuffer() {
int i;
EGLContext eglContext;
EGLDisplay eglDisplay;
EGLSurface eglSurface;
grs_font *font;
JNIEnv *env;
jclass clazz;
jmethodID method;
if (Want_pause) {
// Save this in case we need to destroy it later
eglContext = eglGetCurrentContext();
eglDisplay = eglGetCurrentDisplay();
eglSurface = eglGetCurrentSurface(EGL_DRAW);
// Close digi so another application can use the OpenSL ES objects
digi_close_digi();
(*jvm)->GetEnv(jvm, (void **) &env, JNI_VERSION_1_6);
clazz = (*env)->FindClass(env, "tuchsen/descent/DescentView");
// Pause this thread
method = (*env)->GetMethodID(env, clazz, "pauseRenderThread", "()V");
(*env)->CallVoidMethod(env, Descent_view, method);
digi_init_digi();
if (Surface_was_destroyed) {
// Purge all texture assets, since the EGL context will be blown away
for (i = 0; i < MAX_FONTS; ++i) {
font = Gamefonts[i];
glDeleteTextures(font->ft_maxchar - font->ft_minchar, font->ft_ogles_texes);
memset(font->ft_ogles_texes, 0,
(font->ft_maxchar - font->ft_minchar) * sizeof(GLuint));
}
for (i = 0; i < MAX_BITMAP_FILES; ++i) {
glDeleteTextures(1, &GameBitmaps[i].bm_ogles_tex_id);
GameBitmaps[i].bm_ogles_tex_id = 0;
}
texmerge_close();
texmerge_init(50);
glDeleteTextures(1, &nm_background.bm_ogles_tex_id);
nm_background.bm_ogles_tex_id = 0;
// Blow away EGL surface and context
eglMakeCurrent(eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroySurface(eglDisplay, eglSurface);
eglDestroyContext(eglDisplay, eglContext);
eglTerminate(eglDisplay);
// Reset EGL context
method = (*env)->GetMethodID(env, clazz, "initEgl", "()V");
(*env)->CallVoidMethod(env, Descent_view, method);
(*env)->DeleteLocalRef(env, clazz);
eglSurfaceAttrib(eglGetCurrentDisplay(), eglGetCurrentSurface(EGL_DRAW),
EGL_SWAP_BEHAVIOR,
EGL_BUFFER_PRESERVED);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Hack to show stuff like menus
if (Game_mode != GM_NORMAL || In_screen) {
mouse_handler(-1, -1, true);
mouse_handler(-1, -1, false);
}
Surface_was_destroyed = false;
}
Want_pause = false;
} else {
draw_buttons();
eglSwapBuffers(eglGetCurrentDisplay(), eglGetCurrentSurface(EGL_READ));
can_save_screen = !can_save_screen;
}
}
// oglinit sets the display, OpenGL|ES context and screen information
// state holds the OGLES model information
extern void oglinit(STATE_T * state) {
int32_t success = 0;
EGLBoolean result;
EGLint num_config;
static EGL_DISPMANX_WINDOW_T nativewindow;
DISPMANX_ELEMENT_HANDLE_T dispman_element;
DISPMANX_DISPLAY_HANDLE_T dispman_display;
DISPMANX_UPDATE_HANDLE_T dispman_update;
VC_RECT_T dst_rect;
VC_RECT_T src_rect;
static const EGLint attribute_list[] = {
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_NONE
};
EGLConfig config;
// get an EGL display connection
state->display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
assert(state->display != EGL_NO_DISPLAY);
// initialize the EGL display connection
result = eglInitialize(state->display, NULL, NULL);
assert(EGL_FALSE != result);
// bind OpenVG API
eglBindAPI(EGL_OPENVG_API);
// get an appropriate EGL frame buffer configuration
result = eglChooseConfig(state->display, attribute_list, &config, 1, &num_config);
assert(EGL_FALSE != result);
// create an EGL rendering context
state->context = eglCreateContext(state->display, config, EGL_NO_CONTEXT, NULL);
assert(state->context != EGL_NO_CONTEXT);
// create an EGL window surface
success = graphics_get_display_size(0 /* LCD */ , &state->screen_width,
&state->screen_height);
assert(success >= 0);
dst_rect.x = 0;
dst_rect.y = 0;
dst_rect.width = state->screen_width;
dst_rect.height = state->screen_height;
src_rect.x = 0;
src_rect.y = 0;
src_rect.width = state->screen_width << 16;
src_rect.height = state->screen_height << 16;
dispman_display = vc_dispmanx_display_open(0 /* LCD */ );
dispman_update = vc_dispmanx_update_start(0);
dispman_element = vc_dispmanx_element_add(dispman_update, dispman_display, 0 /*layer */ , &dst_rect, 0 /*src */ ,
&src_rect, DISPMANX_PROTECTION_NONE, 0 /*alpha */ , 0 /*clamp */ ,
0 /*transform */ );
nativewindow.element = dispman_element;
nativewindow.width = state->screen_width;
nativewindow.height = state->screen_height;
vc_dispmanx_update_submit_sync(dispman_update);
state->surface = eglCreateWindowSurface(state->display, config, &nativewindow, NULL);
assert(state->surface != EGL_NO_SURFACE);
// preserve the buffers on swap
result = eglSurfaceAttrib(state->display, state->surface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
assert(EGL_FALSE != result);
// connect the context to the surface
result = eglMakeCurrent(state->display, state->surface, state->surface, state->context);
assert(EGL_FALSE != result);
// set up screen ratio
glViewport(0, 0, (GLsizei) state->screen_width, (GLsizei) state->screen_height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
float ratio = (float)state->screen_width / (float)state->screen_height;
glFrustumf(-ratio, ratio, -1.0f, 1.0f, 1.0f, 10.0f);
}
EGLSurface EglManager::createSurface(EGLNativeWindowType window, bool wideColorGamut) {
initialize();
wideColorGamut = wideColorGamut && EglExtensions.glColorSpace && EglExtensions.scRGB &&
EglExtensions.pixelFormatFloat && EglExtensions.noConfigContext;
// The color space we want to use depends on whether linear blending is turned
// on and whether the app has requested wide color gamut rendering. When wide
// color gamut rendering is off, the app simply renders in the display's native
// color gamut.
//
// When wide gamut rendering is off:
// - Blending is done by default in gamma space, which requires using a
// linear EGL color space (the GPU uses the color values as is)
// - If linear blending is on, we must use the sRGB EGL color space (the
// GPU will perform sRGB to linear and linear to SRGB conversions before
// and after blending)
//
// When wide gamut rendering is on we cannot rely on the GPU performing
// linear blending for us. We use two different color spaces to tag the
// surface appropriately for SurfaceFlinger:
// - Gamma blending (default) requires the use of the scRGB-nl color space
// - Linear blending requires the use of the scRGB color space
// Not all Android targets support the EGL_GL_COLOR_SPACE_KHR extension
// We insert to placeholders to set EGL_GL_COLORSPACE_KHR and its value.
// According to section 3.4.1 of the EGL specification, the attributes
// list is considered empty if the first entry is EGL_NONE
EGLint attribs[] = {EGL_NONE, EGL_NONE, EGL_NONE};
if (EglExtensions.glColorSpace) {
attribs[0] = EGL_GL_COLORSPACE_KHR;
#ifdef ANDROID_ENABLE_LINEAR_BLENDING
if (wideColorGamut) {
attribs[1] = EGL_GL_COLORSPACE_SCRGB_LINEAR_EXT;
} else {
attribs[1] = EGL_GL_COLORSPACE_SRGB_KHR;
}
#else
if (wideColorGamut) {
attribs[1] = EGL_GL_COLORSPACE_SCRGB_EXT;
} else {
attribs[1] = EGL_GL_COLORSPACE_LINEAR_KHR;
}
#endif
}
EGLSurface surface = eglCreateWindowSurface(
mEglDisplay, wideColorGamut ? mEglConfigWideGamut : mEglConfig, window, attribs);
LOG_ALWAYS_FATAL_IF(surface == EGL_NO_SURFACE,
"Failed to create EGLSurface for window %p, eglErr = %s", (void*)window,
eglErrorString());
if (mSwapBehavior != SwapBehavior::Preserved) {
LOG_ALWAYS_FATAL_IF(eglSurfaceAttrib(mEglDisplay, surface, EGL_SWAP_BEHAVIOR,
EGL_BUFFER_DESTROYED) == EGL_FALSE,
"Failed to set swap behavior to destroyed for window %p, eglErr = %s",
(void*)window, eglErrorString());
}
return surface;
}
