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#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <GL/glx.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "SkWindow.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkEvent.h"
#include "SkKey.h"
#include "SkWindow.h"
#include "XkeysToSkKeys.h"
extern "C" {
#include "keysym2ucs.h"
}
const int WIDTH = 500;
const int HEIGHT = 500;
// Determine which events to listen for.
const long EVENT_MASK = StructureNotifyMask|ButtonPressMask|ButtonReleaseMask
|ExposureMask|PointerMotionMask|KeyPressMask|KeyReleaseMask;
SkOSWindow::SkOSWindow(void* unused) : INHERITED(), fGLAttached(false), fVi(0)
{
fUnixWindow.fDisplay = XOpenDisplay(NULL);
Display* dsp = fUnixWindow.fDisplay;
if (dsp) {
// Attempt to create a window that supports GL
GLint att[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, GLX_DOUBLEBUFFER,
GLX_STENCIL_SIZE, 8, None };
fVi = glXChooseVisual(dsp, DefaultScreen(dsp), att);
if (fVi) {
Colormap colorMap = XCreateColormap(dsp, RootWindow(dsp, fVi->screen),
fVi->visual, AllocNone);
XSetWindowAttributes swa;
swa.colormap = colorMap;
swa.event_mask = EVENT_MASK;
fUnixWindow.fWin = XCreateWindow(dsp, RootWindow(dsp, fVi->screen),
0, 0, WIDTH, HEIGHT, 0, fVi->depth,
InputOutput, fVi->visual, CWEventMask | CWColormap, &swa);
} else {
// Create a simple window instead. We will not be able to
// show GL
fUnixWindow.fWin = XCreateSimpleWindow(dsp, DefaultRootWindow(dsp),
0, 0, WIDTH, HEIGHT, 0, 0, 0);
}
mapWindowAndWait();
fUnixWindow.fGc = XCreateGC(dsp, fUnixWindow.fWin, 0, NULL);
}
this->resize(WIDTH, HEIGHT);
fUnixWindow.fGLCreated = false;
}
SkOSWindow::~SkOSWindow()
{
if (fUnixWindow.fDisplay) {
if (fGLAttached)
glXMakeCurrent(fUnixWindow.fDisplay, None, NULL);
XFreeGC(fUnixWindow.fDisplay, fUnixWindow.fGc);
if (fUnixWindow.fGLCreated)
glXDestroyContext(fUnixWindow.fDisplay, fUnixWindow.fGLContext);
XDestroyWindow(fUnixWindow.fDisplay, fUnixWindow.fWin);
XCloseDisplay(fUnixWindow.fDisplay);
fUnixWindow.fDisplay = 0;
}
}
void SkOSWindow::post_linuxevent()
{
// Put an event in the X queue to fire an SkEvent.
if (!fUnixWindow.fDisplay) return;
long event_mask = NoEventMask;
XClientMessageEvent event;
event.type = ClientMessage;
Atom myAtom(0);
event.message_type = myAtom;
event.format = 32;
event.data.l[0] = 0;
XSendEvent(fUnixWindow.fDisplay, fUnixWindow.fWin, false, 0,
(XEvent*) &event);
XFlush(fUnixWindow.fDisplay);
}
void SkOSWindow::loop()
{
Display* dsp = fUnixWindow.fDisplay;
XSelectInput(dsp, fUnixWindow.fWin, EVENT_MASK);
bool loop = true;
XEvent evt;
while (loop) {
XNextEvent(dsp, &evt);
switch (evt.type) {
case Expose:
if (evt.xexpose.count == 0)
this->inval(NULL);
break;
case ConfigureNotify:
this->resize(evt.xconfigure.width, evt.xconfigure.height);
break;
case ButtonPress:
if (evt.xbutton.button == Button1)
this->handleClick(evt.xbutton.x, evt.xbutton.y, SkView::Click::kDown_State);
break;
case ButtonRelease:
if (evt.xbutton.button == Button1)
this->handleClick(evt.xbutton.x, evt.xbutton.y, SkView::Click::kUp_State);
break;
case MotionNotify:
this->handleClick(evt.xmotion.x, evt.xmotion.y, SkView::Click::kMoved_State);
break;
case KeyPress:
{
KeySym keysym = XKeycodeToKeysym(dsp, evt.xkey.keycode, 0);
//SkDebugf("pressed key %i!\n\tKeySym:%i\n", evt.xkey.keycode, XKeycodeToKeysym(dsp, evt.xkey.keycode, 0));
if (keysym == XK_Escape) {
loop = false;
break;
}
this->handleKey(XKeyToSkKey(keysym));
long uni = keysym2ucs(keysym);
if (uni != -1) {
this->handleChar((SkUnichar) uni);
}
break;
}
case KeyRelease:
//SkDebugf("released key %i\n", evt.xkey.keycode);
this->handleKeyUp(XKeyToSkKey(XKeycodeToKeysym(dsp, evt.xkey.keycode, 0)));
break;
case ClientMessage:
if (SkEvent::ProcessEvent()) {
this->post_linuxevent();
}
break;
default:
// Do nothing for other events
break;
}
}
}
void SkOSWindow::mapWindowAndWait()
{
Display* dsp = fUnixWindow.fDisplay;
Window win = fUnixWindow.fWin;
XMapWindow(dsp, win);
long eventMask = StructureNotifyMask;
XSelectInput(dsp, win, eventMask);
// Wait until screen is ready.
XEvent evt;
do {
XNextEvent(dsp, &evt);
} while(evt.type != MapNotify);
}
bool SkOSWindow::attachGL()
{
if (fGLAttached) return true;
Display* dsp = fUnixWindow.fDisplay;
if (!dsp || !fVi) return false;
if (!fUnixWindow.fGLCreated) {
fUnixWindow.fGLContext = glXCreateContext(dsp, fVi, NULL, GL_TRUE);
fUnixWindow.fGLCreated = true;
glXMakeCurrent(dsp, fUnixWindow.fWin, fUnixWindow.fGLContext);
glViewport(0, 0, SkScalarRound(this->width()), SkScalarRound(this->height()));
glClearColor(0, 0, 0, 0);
glClearStencil(0);
glStencilMask(0xffffffff);
glDisable(GL_SCISSOR_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
}
else
glXMakeCurrent(dsp, fUnixWindow.fWin, fUnixWindow.fGLContext);
fGLAttached = true;
return true;
}
void SkOSWindow::detachGL()
{
if (!fUnixWindow.fDisplay || !fGLAttached) return;
fGLAttached = false;
// Returns back to normal drawing.
glXMakeCurrent(fUnixWindow.fDisplay, None, NULL);
// Ensure that we redraw when switching back to raster.
this->inval(NULL);
}
void SkOSWindow::presentGL()
{
if (fUnixWindow.fDisplay && fGLAttached) {
glXSwapBuffers(fUnixWindow.fDisplay, fUnixWindow.fWin);
}
}
void SkOSWindow::onSetTitle(const char title[])
{
if (!fUnixWindow.fDisplay) return;
XTextProperty textProp;
textProp.value = (unsigned char*)title;
textProp.format = 8;
textProp.nitems = strlen((char*)textProp.value);
textProp.encoding = XA_STRING;
XSetWMName(fUnixWindow.fDisplay, fUnixWindow.fWin, &textProp);
}
void SkOSWindow::onHandleInval(const SkIRect&)
{
SkEvent* evt = new SkEvent("inval-imageview");
evt->post(getSinkID());
}
bool SkOSWindow::onEvent(const SkEvent& evt)
{
if (evt.isType("inval-imageview")) {
update(NULL);
if (!fGLAttached)
doPaint();
return true;
}
return INHERITED::onEvent(evt);
}
static bool convertBitmapToXImage(XImage& image, const SkBitmap& bitmap)
{
sk_bzero(&image, sizeof(image));
int bitsPerPixel = bitmap.bytesPerPixel() * 8;
image.width = bitmap.width();
image.height = bitmap.height();
image.format = ZPixmap;
image.data = (char*) bitmap.getPixels();
image.byte_order = LSBFirst;
image.bitmap_unit = bitsPerPixel;
image.bitmap_bit_order = LSBFirst;
image.bitmap_pad = bitsPerPixel;
image.depth = 24;
image.bytes_per_line = bitmap.rowBytes() - bitmap.width() * bitmap.bytesPerPixel();
image.bits_per_pixel = bitsPerPixel;
return XInitImage(&image);
}
void SkOSWindow::doPaint() {
if (!fUnixWindow.fDisplay) return;
// Draw the bitmap to the screen.
const SkBitmap& bitmap = getBitmap();
int width = bitmap.width();
int height = bitmap.height();
XImage image;
if (!convertBitmapToXImage(image, bitmap)) return;
XPutImage(fUnixWindow.fDisplay, fUnixWindow.fWin, fUnixWindow.fGc, &image, 0, 0, 0, 0, width, height);
}
bool SkOSWindow::onHandleChar(SkUnichar)
{
return false;
}
bool SkOSWindow::onHandleKey(SkKey key)
{
return false;
}
bool SkOSWindow::onHandleKeyUp(SkKey key)
{
return false;
}
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