diff options
Diffstat (limited to 'src/plugins/platforms/xcb/qdri2context.cpp')
| -rw-r--r-- | src/plugins/platforms/xcb/qdri2context.cpp | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/qdri2context.cpp b/src/plugins/platforms/xcb/qdri2context.cpp new file mode 100644 index 0000000..44b8fc2 --- /dev/null +++ b/src/plugins/platforms/xcb/qdri2context.cpp @@ -0,0 +1,224 @@ +#include "qdri2context.h" + +#include "qxcbwindow.h" +#include "qxcbconnection.h" + +#include <QtCore/QDebug> +#include <QtGui/QWidget> + +#include <xcb/dri2.h> +#include <xcb/xfixes.h> + +#define MESA_EGL_NO_X11_HEADERS +#define EGL_EGLEXT_PROTOTYPES +#include <EGL/egl.h> +#include <EGL/eglext.h> + +#define GL_GLEXT_PROTOTYPES +#include <GLES2/gl2.h> +#include <GLES2/gl2ext.h> + +class QDri2ContextPrivate +{ +public: + QDri2ContextPrivate(QXcbWindow *window) + : qXcbWindow(window) + , windowFormat(window->widget()->platformWindowFormat()) + , image(0) + { + } + + xcb_window_t xcbWindow() { return qXcbWindow->window(); } + xcb_connection_t *xcbConnection() { return qXcbWindow->xcb_connection(); } + + QXcbWindow *qXcbWindow; + QPlatformWindowFormat windowFormat; + + EGLContext eglContext; + + EGLImageKHR image; + + GLuint fbo; + GLuint rbo; + GLuint depth; + + QSize size; +}; + +QDri2Context::QDri2Context(QXcbWindow *window) + : d_ptr(new QDri2ContextPrivate(window)) +{ + Q_D(QDri2Context); + + static const EGLint contextAttribs[] = { + EGL_CONTEXT_CLIENT_VERSION, 2, + EGL_NONE + }; + + eglBindAPI(EGL_OPENGL_ES_API); + + EGLContext shareContext = EGL_NO_CONTEXT; + if (window->widget()->platformWindowFormat().sharedGLContext()) { + QDri2Context *context = static_cast<QDri2Context *>(window->widget()->platformWindowFormat().sharedGLContext()); + shareContext = context->d_func()->eglContext; + } + d->eglContext = eglCreateContext(EGL_DISPLAY_FROM_XCB(d->qXcbWindow), NULL, + shareContext, contextAttribs); + + if (d->eglContext == EGL_NO_CONTEXT) { + qDebug() << "No eglContext!" << eglGetError(); + } + + EGLBoolean makeCurrentSuccess = eglMakeCurrent(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),EGL_NO_SURFACE,EGL_NO_SURFACE,d->eglContext); + if (!makeCurrentSuccess) { + qDebug() << "eglMakeCurrent failed!" << eglGetError(); + } + + xcb_dri2_create_drawable (d->xcbConnection(), d->xcbWindow()); + + glGenFramebuffers(1,&d->fbo); + glBindFramebuffer(GL_FRAMEBUFFER,d->fbo); + glActiveTexture(GL_TEXTURE0); + + glGenRenderbuffers(1, &d->rbo); + glBindRenderbuffer(GL_RENDERBUFFER, d->rbo); + + glGenRenderbuffers(1,&d->depth); + glBindRenderbuffer(GL_RENDERBUFFER, d->depth); + + resize(d->qXcbWindow->widget()->geometry().size()); + + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, d->rbo); + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERER,d->depth); + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERER,d->depth); + + //restore the old current context + const QPlatformGLContext *currentContext = QPlatformGLContext::currentContext(); + if (currentContext) + const_cast<QPlatformGLContext*>(currentContext)->makeCurrent(); +} + +QDri2Context::~QDri2Context() +{ + //cleanup +} + +void QDri2Context::makeCurrent() +{ + QPlatformGLContext::makeCurrent(); + Q_D(QDri2Context); + + eglMakeCurrent(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),EGL_NO_SURFACE,EGL_NO_SURFACE,d->eglContext); + glBindFramebuffer(GL_FRAMEBUFFER,d->fbo); + +} + +void QDri2Context::doneCurrent() +{ + QPlatformGLContext::doneCurrent(); + Q_D(QDri2Context); + eglMakeCurrent(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),EGL_NO_SURFACE,EGL_NO_SURFACE,EGL_NO_CONTEXT); +} + +void QDri2Context::swapBuffers() +{ + Q_D(QDri2Context); + xcb_rectangle_t rectangle; + rectangle.x = 0; + rectangle.y = 0; + rectangle.width = d->qXcbWindow->widget()->geometry().width(); + rectangle.height = d->qXcbWindow->widget()->geometry().height(); + + xcb_xfixes_region_t xfixesRegion = xcb_generate_id(d->xcbConnection()); + xcb_xfixes_create_region(d->xcbConnection(), xfixesRegion, + 1, &rectangle); + + xcb_dri2_copy_region_cookie_t cookie = xcb_dri2_copy_region_unchecked(d->xcbConnection(), + d->qXcbWindow->window(), + xfixesRegion, + XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT, + XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT); + + xcb_dri2_copy_region_reply_t *reply = xcb_dri2_copy_region_reply(d->xcbConnection(),cookie,NULL); + + //cleanup + delete reply; + xcb_xfixes_destroy_region(d->xcbConnection(), xfixesRegion); + +} + +void * QDri2Context::getProcAddress(const QString &procName) +{ + return (void *)eglGetProcAddress(qPrintable(procName)); +} + +void QDri2Context::resize(const QSize &size) +{ + Q_D(QDri2Context); + d->size= size; + + glBindFramebuffer(GL_FRAMEBUFFER,d->fbo); + + xcb_dri2_dri2_buffer_t *backBfr = backBuffer(); + + if (d->image) { + qDebug() << "destroing image"; + eglDestroyImageKHR(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),d->image); + } + + EGLint imgAttribs[] = { + EGL_WIDTH, d->size.width(), + EGL_HEIGHT, d->size.height(), + EGL_DRM_BUFFER_STRIDE_MESA, backBfr->pitch /4, + EGL_DRM_BUFFER_FORMAT_MESA, EGL_DRM_BUFFER_FORMAT_ARGB32_MESA, + EGL_NONE + }; + + d->image = eglCreateImageKHR(EGL_DISPLAY_FROM_XCB(d->qXcbWindow), + EGL_NO_CONTEXT, + EGL_DRM_BUFFER_MESA, + (EGLClientBuffer) backBfr->name, + imgAttribs); + + glBindRenderbuffer(GL_RENDERBUFFER, d->rbo); + glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER, + d->image); + + glBindRenderbuffer(GL_RENDERBUFFER, d->depth); + glRenderbufferStorage(GL_RENDERBUFFER,GL_DEPTH24_STENCIL8_OES,d->size.width(), d->size.height()); + +} + +QPlatformWindowFormat QDri2Context::platformWindowFormat() const +{ + Q_D(const QDri2Context); + return d->windowFormat; +} + +xcb_dri2_dri2_buffer_t * QDri2Context::backBuffer() +{ + Q_D(QDri2Context); + + unsigned int backBufferAttachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT; + xcb_dri2_get_buffers_cookie_t cookie = xcb_dri2_get_buffers_unchecked (d->xcbConnection(), + d->xcbWindow(), + 1, 1, &backBufferAttachment); + + xcb_dri2_get_buffers_reply_t *reply = xcb_dri2_get_buffers_reply (d->xcbConnection(), cookie, NULL); + if (!reply) { + qDebug() << "failed to get buffers reply"; + return 0; + } + + xcb_dri2_dri2_buffer_t *buffers = xcb_dri2_get_buffers_buffers (reply); + if (!buffers) { + qDebug() << "failed to get buffers"; + return 0; + } + + Q_ASSERT(reply->count == 1); + + delete reply; + + return buffers; +} |