qt5base-lts/mkspecs/devices/linux-rasp-pi-g++/qeglfshooks_pi.cpp
Girish Ramakrishnan 5933205cfc eglfs: implement hardware cursor for the raspberry-pi
The cursor is rendered on a dispmanx layer and moved
around. This approach saves us from having to update the
underlying window each time the cursor moves.

Dispmanx layers cannot be moved to negative coords. As
a result, currently it is not possible to move to a
location less than the hostpot. A future commit will
fix this problem.

Change-Id: Ida5ee961d03a6929860c515e503482756a4913ed
Reviewed-by: Johannes Zellner <johannes.zellner@nokia.com>
Reviewed-by: Andy Nichols <andy.nichols@nokia.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
2012-06-01 15:22:49 +02:00

322 lines
10 KiB
C++

/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
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#include "qeglfshooks.h"
#include "qeglfscursor.h"
#include <QtDebug>
#include <QtPlatformSupport/private/qeglconvenience_p.h>
#include <QtPlatformSupport/private/qeglplatformcontext_p.h>
#include <bcm_host.h>
#if 0 //fb size query
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/fb.h>
#endif
QT_BEGIN_NAMESPACE
static DISPMANX_DISPLAY_HANDLE_T dispman_display = 0;
static EGLNativeWindowType createDispmanxLayer(const QPoint &pos, const QSize &size, int z, DISPMANX_FLAGS_ALPHA_T flags)
{
VC_RECT_T dst_rect;
dst_rect.x = pos.x();
dst_rect.y = pos.y();
dst_rect.width = size.width();
dst_rect.height = size.height();
VC_RECT_T src_rect;
src_rect.x = 0;
src_rect.y = 0;
src_rect.width = size.width() << 16;
src_rect.height = size.height() << 16;
DISPMANX_UPDATE_HANDLE_T dispman_update = vc_dispmanx_update_start(0);
VC_DISPMANX_ALPHA_T alpha;
alpha.flags = flags;
alpha.opacity = 0xFF;
alpha.mask = 0;
DISPMANX_ELEMENT_HANDLE_T dispman_element = vc_dispmanx_element_add(
dispman_update, dispman_display, z, &dst_rect, 0, &src_rect,
DISPMANX_PROTECTION_NONE, &alpha, (DISPMANX_CLAMP_T *)NULL, (DISPMANX_TRANSFORM_T)0);
vc_dispmanx_update_submit_sync(dispman_update);
EGL_DISPMANX_WINDOW_T *eglWindow = new EGL_DISPMANX_WINDOW_T;
eglWindow->element = dispman_element;
eglWindow->width = size.width();
eglWindow->height = size.height();
return eglWindow;
}
// this function is not part of debian squeeze headers
extern "C" int VCHPOST_ vc_dispmanx_element_change_attributes(DISPMANX_UPDATE_HANDLE_T update,
DISPMANX_ELEMENT_HANDLE_T element, uint32_t change_flags, int32_t layer,
uint8_t opacity, const VC_RECT_T *dest_rect, const VC_RECT_T *src_rect,
DISPMANX_RESOURCE_HANDLE_T mask, VC_IMAGE_TRANSFORM_T transform);
// these constants are not in any headers (yet)
#define ELEMENT_CHANGE_LAYER (1<<0)
#define ELEMENT_CHANGE_OPACITY (1<<1)
#define ELEMENT_CHANGE_DEST_RECT (1<<2)
#define ELEMENT_CHANGE_SRC_RECT (1<<3)
#define ELEMENT_CHANGE_MASK_RESOURCE (1<<4)
#define ELEMENT_CHANGE_TRANSFORM (1<<5)
static void moveDispmanxLayer(EGLNativeWindowType window, const QPoint &pos)
{
EGL_DISPMANX_WINDOW_T *eglWindow = static_cast<EGL_DISPMANX_WINDOW_T *>(window);
QSize size(eglWindow->width, eglWindow->height);
VC_RECT_T dst_rect;
dst_rect.x = pos.x();
dst_rect.y = pos.y();
dst_rect.width = size.width();
dst_rect.height = size.height();
VC_RECT_T src_rect;
src_rect.x = 0;
src_rect.y = 0;
src_rect.width = size.width() << 16;
src_rect.height = size.height() << 16;
DISPMANX_UPDATE_HANDLE_T dispman_update = vc_dispmanx_update_start(0);
vc_dispmanx_element_change_attributes(dispman_update,
eglWindow->element,
ELEMENT_CHANGE_DEST_RECT /*change_flags*/,
0,
0,
&dst_rect,
NULL,
0,
(VC_IMAGE_TRANSFORM_T)0);
vc_dispmanx_update_submit_sync(dispman_update);
}
static void destroyDispmanxLayer(EGLNativeWindowType window)
{
EGL_DISPMANX_WINDOW_T *eglWindow = static_cast<EGL_DISPMANX_WINDOW_T *>(window);
DISPMANX_UPDATE_HANDLE_T dispman_update = vc_dispmanx_update_start(0);
vc_dispmanx_element_remove(dispman_update, eglWindow->element);
vc_dispmanx_update_submit_sync(dispman_update);
delete eglWindow;
}
class QEglFSPiCursor : public QEglFSCursor
{
public:
QEglFSPiCursor(QEglFSScreen *screen) : QEglFSCursor(screen) {
QSurfaceFormat platformFormat;
platformFormat.setDepthBufferSize(24);
platformFormat.setStencilBufferSize(8);
platformFormat.setRedBufferSize(8);
platformFormat.setGreenBufferSize(8);
platformFormat.setBlueBufferSize(8);
platformFormat.setAlphaBufferSize(8);
m_config = q_configFromGLFormat(m_screen->display(), platformFormat);
createSurface();
createContext();
drawInLayer();
}
~QEglFSPiCursor() {
eglDestroySurface(m_screen->display(), m_surface);
destroyDispmanxLayer(m_window);
eglDestroyContext(m_screen->display(), m_context);
}
void createSurface() {
const QRect cr = cursorRect();
m_window = createDispmanxLayer(cr.topLeft(), cr.size(), 50, DISPMANX_FLAGS_ALPHA_FROM_SOURCE);
m_surface = eglCreateWindowSurface(m_screen->display(), m_config, m_window, NULL);
}
void createContext() {
eglBindAPI(EGL_OPENGL_ES_API);
QVector<EGLint> attrs;
attrs.append(EGL_CONTEXT_CLIENT_VERSION);
attrs.append(2);
attrs.append(EGL_NONE);
m_context = eglCreateContext(m_screen->display(), m_config, EGL_NO_CONTEXT, attrs.constData());
}
void drawInLayer() {
eglMakeCurrent(m_screen->display(), m_surface, m_surface, m_context);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
draw(QRectF(QPointF(-1, 1), QPointF(1, -1)));
eglSwapBuffers(m_screen->display(), m_surface);
eglMakeCurrent(m_screen->display(), EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
}
void changeCursor(QCursor *cursor, QWindow *window) {
if (!setCurrentCursor(cursor))
return;
EGL_DISPMANX_WINDOW_T *eglWindow = static_cast<EGL_DISPMANX_WINDOW_T *>(m_window);
if (QSize(eglWindow->width, eglWindow->height) != m_cursor.size) {
eglDestroySurface(m_screen->display(), m_surface);
destroyDispmanxLayer(m_window);
createSurface();
}
drawInLayer();
}
void setPos(const QPoint &pos) {
m_pos = pos;
moveDispmanxLayer(m_window, cursorRect().topLeft());
}
void pointerEvent(const QMouseEvent &event) {
if (event.type() != QEvent::MouseMove)
return;
m_pos = event.pos();
moveDispmanxLayer(m_window, cursorRect().topLeft());
}
void paintOnScreen() { }
private:
EGLConfig m_config;
EGLContext m_context;
EGLNativeWindowType m_window;
EGLSurface m_surface;
};
class QEglFSPiHooks : public QEglFSHooks
{
public:
virtual void platformInit();
virtual void platformDestroy();
virtual EGLNativeDisplayType platformDisplay() const;
virtual QSize screenSize() const;
virtual EGLNativeWindowType createNativeWindow(const QSize &size);
virtual void destroyNativeWindow(EGLNativeWindowType window);
virtual bool hasCapability(QPlatformIntegration::Capability cap) const;
QEglFSCursor *createCursor(QEglFSScreen *screen) const {
return new QEglFSPiCursor(screen);
}
};
void QEglFSPiHooks::platformInit()
{
bcm_host_init();
}
EGLNativeDisplayType QEglFSPiHooks::platformDisplay() const
{
dispman_display = vc_dispmanx_display_open(0/* LCD */);
return EGL_DEFAULT_DISPLAY;
}
void QEglFSPiHooks::platformDestroy()
{
vc_dispmanx_display_close(dispman_display);
}
QSize QEglFSPiHooks::screenSize() const
{
//both mechanisms work
#if 1
uint32_t width, height;
graphics_get_display_size(0 /* LCD */, &width, &height);
return QSize(width, height);
#else
int fd = open("/dev/fb0", O_RDONLY);
if (fd == -1) {
fprintf(stderr, "Failed to open fb to detect screen resolution!\n");
return QSize();
}
struct fb_var_screeninfo vinfo;
if (ioctl(fd, FBIOGET_VSCREENINFO, &vinfo) = -1) {
fprintf(stderr, "Could not query screen info variable\n");
close(fd);
return QSize();
}
close(fd);
return QSize(vinfo.xres, vinfo.yres);
#endif
}
EGLNativeWindowType QEglFSPiHooks::createNativeWindow(const QSize &size)
{
return createDispmanxLayer(QPoint(0, 0), size, 0, DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS);
}
void QEglFSPiHooks::destroyNativeWindow(EGLNativeWindowType window)
{
destroyDispmanxLayer(window);
}
bool QEglFSPiHooks::hasCapability(QPlatformIntegration::Capability cap) const
{
switch (cap) {
case QPlatformIntegration::ThreadedPixmaps:
case QPlatformIntegration::OpenGL:
case QPlatformIntegration::ThreadedOpenGL:
case QPlatformIntegration::BufferQueueingOpenGL:
return true;
default:
return false;
}
}
QEglFSPiHooks eglFSPiHooks;
QEglFSHooks *platformHooks = &eglFSPiHooks;
QT_END_NAMESPACE