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eglfs: implement hardware cursor for the raspberry-pi

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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>
This commit is contained in:
Girish Ramakrishnan 2012-05-26 11:52:06 -07:00 committed by Qt by Nokia
parent bae1613c4c
commit 5933205cfc
8 changed files with 264 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

219
mkspecs/devices/linux-rasp-pi-g++/qeglfshooks_pi.cpp
View File

@ -40,6 +40,12 @@
****************************************************************************/
#include "qeglfshooks.h"
#include "qeglfscursor.h"
#include <QtDebug>
#include <QtPlatformSupport/private/qeglconvenience_p.h>
#include <QtPlatformSupport/private/qeglplatformcontext_p.h>
#include <bcm_host.h>
@ -56,6 +62,177 @@ 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:
@ -66,6 +243,10 @@ public:
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()
@ -113,46 +294,12 @@ QSize QEglFSPiHooks::screenSize() const
EGLNativeWindowType QEglFSPiHooks::createNativeWindow(const QSize &size)
{
VC_RECT_T dst_rect;
dst_rect.x = 0;
dst_rect.y = 0;
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 = DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS;
alpha.opacity = 0xFF;
alpha.mask = 0;
DISPMANX_ELEMENT_HANDLE_T dispman_element = vc_dispmanx_element_add(
dispman_update, dispman_display, 0, &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;
return createDispmanxLayer(QPoint(0, 0), size, 0, DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS);
}
void QEglFSPiHooks::destroyNativeWindow(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;
destroyDispmanxLayer(window);
}
bool QEglFSPiHooks::hasCapability(QPlatformIntegration::Capability cap) const

2
src/plugins/platforms/eglfs/eglfs.pro
View File

@ -31,6 +31,8 @@ HEADERS = qeglfsintegration.h \
QMAKE_LFLAGS += $$QMAKE_LFLAGS_NOUNDEF
INCLUDEPATH += $$PWD
!isEmpty(EGLFS_PLATFORM_HOOKS_SOURCES) {
HEADERS += $$EGLFS_PLATFORM_HOOKS_HEADERS
SOURCES += $$EGLFS_PLATFORM_HOOKS_SOURCES

2
src/plugins/platforms/eglfs/qeglfsbackingstore.cpp
View File

@ -182,7 +182,7 @@ void QEglFSBackingStore::flush(QWindow *window, const QRegion &region, const QPo
// draw the cursor
if (QEglFSCursor *cursor = static_cast<QEglFSCursor *>(window->screen()->handle()->cursor()))
cursor->render();
cursor->paintOnScreen();
m_context->swapBuffers(window);

57
src/plugins/platforms/eglfs/qeglfscursor.cpp
View File

@ -54,9 +54,9 @@ QEglFSCursor::QEglFSCursor(QEglFSScreen *screen)
{
initCursorAtlas();
// ## this shouldn't be required
// initialize the cursor
QCursor cursor(Qt::ArrowCursor);
changeCursor(&cursor, 0);
setCurrentCursor(&cursor);
}
QEglFSCursor::~QEglFSCursor()
@ -185,7 +185,16 @@ void QEglFSCursor::initCursorAtlas()
void QEglFSCursor::changeCursor(QCursor *cursor, QWindow *window)
{
Q_UNUSED(window);
const QRect oldCursorRect = cursorRect();
if (setCurrentCursor(cursor))
update(oldCursorRect | cursorRect());
}
bool QEglFSCursor::setCurrentCursor(QCursor *cursor)
{
if (m_cursor.shape == cursor->shape() && cursor->shape() != Qt::BitmapCursor)
return false;
if (m_cursor.shape == Qt::BitmapCursor) {
m_cursor.customCursorImage = QImage(); // in case render() never uploaded it
@ -210,8 +219,12 @@ void QEglFSCursor::changeCursor(QCursor *cursor, QWindow *window)
m_cursor.customCursorImage = image;
}
QRegion rgn = oldCursorRect | cursorRect();
QWindowSystemInterface::handleSynchronousExposeEvent(window, rgn);
return true;
}
void QEglFSCursor::update(const QRegion &rgn)
{
QWindowSystemInterface::handleSynchronousExposeEvent(m_screen->topLevelAt(m_pos), rgn);
}
QRect QEglFSCursor::cursorRect() const
@ -228,8 +241,7 @@ void QEglFSCursor::setPos(const QPoint &pos)
{
const QRect oldCursorRect = cursorRect();
m_pos = pos;
QRegion rgn = oldCursorRect | cursorRect();
QWindowSystemInterface::handleSynchronousExposeEvent(m_screen->topLevelAt(m_pos), rgn);
update(oldCursorRect | cursorRect());
}
void QEglFSCursor::pointerEvent(const QMouseEvent &event)
@ -238,11 +250,23 @@ void QEglFSCursor::pointerEvent(const QMouseEvent &event)
return;
const QRect oldCursorRect = cursorRect();
m_pos = event.pos();
QRegion rgn = oldCursorRect | cursorRect();
QWindowSystemInterface::handleSynchronousExposeEvent(m_screen->topLevelAt(m_pos), rgn);
update(oldCursorRect | cursorRect());
}
void QEglFSCursor::render()
void QEglFSCursor::paintOnScreen()
{
const QRectF cr = cursorRect();
const QRect screenRect(m_screen->geometry());
const GLfloat x1 = 2 * (cr.left() / screenRect.width()) - 1;
const GLfloat x2 = 2 * (cr.right() / screenRect.width()) - 1;
const GLfloat y1 = 1 - (cr.top() / screenRect.height()) * 2;
const GLfloat y2 = 1 - (cr.bottom() / screenRect.height()) * 2;
QRectF r(QPointF(x1, y1), QPointF(x2, y2));
draw(r);
}
void QEglFSCursor::draw(const QRectF &r)
{
if (!m_program) {
// one time initialization
@ -268,18 +292,11 @@ void QEglFSCursor::render()
glUseProgram(m_program);
const QRectF cr = cursorRect();
const QRect screenRect(m_screen->geometry());
const GLfloat x1 = 2 * (cr.left() / screenRect.width()) - 1;
const GLfloat x2 = 2 * (cr.right() / screenRect.width()) - 1;
const GLfloat y1 = 1 - (cr.top() / screenRect.height()) * 2;
const GLfloat y2 = 1 - (cr.bottom() / screenRect.height()) * 2;
const GLfloat cursorCoordinates[] = {
x1, y2,
x2, y2,
x1, y1,
x2, y1
r.left(), r.bottom(),
r.right(), r.bottom(),
r.left(), r.top(),
r.right(), r.top()
};
const GLfloat s1 = m_cursor.textureRect.left();

42
src/plugins/platforms/eglfs/qeglfscursor.h
View File

@ -49,6 +49,7 @@
QT_BEGIN_NAMESPACE
class QOpenGLShaderProgram;
class QEglFSScreen;
class QEglFSCursor : public QPlatformCursor
{
@ -64,25 +65,14 @@ public:
QRect cursorRect() const;
void render();
virtual void paintOnScreen();
private:
void createShaderPrograms();
static void createCursorTexture(uint *texture, const QImage &image);
void initCursorAtlas();
protected:
bool setCurrentCursor(QCursor *cursor);
void draw(const QRectF &rect);
void update(const QRegion &region);
QPlatformScreen *m_screen;
// cursor atlas information
struct CursorAtlas {
CursorAtlas() : cursorsPerRow(0), texture(0), cursorWidth(0), cursorHeight(0) { }
int cursorsPerRow;
uint texture;
int width, height; // width and height of the the atlas
int cursorWidth, cursorHeight; // width and height of cursors inside the atlas
QList<QPoint> hotSpots;
QImage image; // valid until it's uploaded
} m_cursorAtlas;
QEglFSScreen *m_screen;
// current cursor information
struct Cursor {
@ -96,7 +86,23 @@ private:
uint customCursorTexture;
} m_cursor;
QPoint m_pos;
QPoint m_pos; // current cursor position
private:
void createShaderPrograms();
static void createCursorTexture(uint *texture, const QImage &image);
void initCursorAtlas();
// cursor atlas information
struct CursorAtlas {
CursorAtlas() : cursorsPerRow(0), texture(0), cursorWidth(0), cursorHeight(0) { }
int cursorsPerRow;
uint texture;
int width, height; // width and height of the the atlas
int cursorWidth, cursorHeight; // width and height of cursors inside the atlas
QList<QPoint> hotSpots;
QImage image; // valid until it's uploaded
} m_cursorAtlas;
GLuint m_program;
int m_vertexCoordEntry;

4
src/plugins/platforms/eglfs/qeglfshooks.h
View File

@ -47,6 +47,9 @@
QT_BEGIN_NAMESPACE
class QEglFSCursor;
class QEglFSScreen;
class QEglFSHooks
{
public:
@ -57,6 +60,7 @@ public:
virtual EGLNativeWindowType createNativeWindow(const QSize &size);
virtual void destroyNativeWindow(EGLNativeWindowType window);
virtual bool hasCapability(QPlatformIntegration::Capability cap) const;
virtual QEglFSCursor *createCursor(QEglFSScreen *screen) const;
};
#ifdef EGLFS_PLATFORM_HOOKS

6
src/plugins/platforms/eglfs/qeglfshooks_stub.cpp
View File

@ -78,6 +78,12 @@ bool QEglFSHooks::hasCapability(QPlatformIntegration::Capability cap) const
return false;
}
QEglFSCursor *QEglFSHooks::createCursor(QEglFSScreen *screen) const
{
Q_UNUSED(screen);
return 0;
}
#ifndef EGLFS_PLATFORM_HOOKS
QEglFSHooks stubHooks;
#endif

10
src/plugins/platforms/eglfs/qeglfsscreen.cpp
View File

@ -72,7 +72,7 @@ public:
QEglFSWindow *window = static_cast<QEglFSWindow *>(surface);
QEglFSScreen *screen = static_cast<QEglFSScreen *>(window->screen());
if (QEglFSCursor *cursor = static_cast<QEglFSCursor *>(screen->cursor()))
cursor->render();
cursor->paintOnScreen();
QEGLPlatformContext::swapBuffers(surface);
}
@ -124,8 +124,12 @@ QEglFSScreen::QEglFSScreen()
eglSwapInterval(m_dpy, swapInterval);
static int hideCursor = qgetenv("QT_QPA_EGLFS_HIDECURSOR").toInt();
if (!hideCursor)
m_cursor = new QEglFSCursor(this);
if (!hideCursor) {
if (QEglFSCursor *customCursor = hooks->createCursor(this))
m_cursor = customCursor;
else
m_cursor = new QEglFSCursor(this);
}
}
QEglFSScreen::~QEglFSScreen()