unsigned int Timer::getElapsedMilliseconds() const {
return static_cast<unsigned int>(getElapsedMicroseconds()/1000);
}
double Timer::getElapsedSeconds() const {
return getElapsedMicroseconds()/1000000.0;
}
int main (int argc, char* argv[])
{
/* Determine number of iterations. */
if (2 != argc)
{
printf("usage: %s <num-iterations>\n", argv[0]);
exit(1);
}
int numIterations = atoi(argv[1]);
int returnCode = 0;
Display* xDisplay = NULL;
Window xWindow = 0;
Picture xPictureWindow = 0;
Pixmap xPixmapMain = 0;
Picture xPictureMain = 0;
Pixmap xPixmapOverlay = 0;
Picture xPictureOverlay = 0;
Pixmap xPixmapMask = 0;
Picture xPictureMask = 0;
GC gcMask = 0;
/* Access X display. */
if (NULL == (xDisplay = XOpenDisplay(NULL)))
{
printf("XOpenDisplay(NULL) failed\n");
returnCode = 1;
goto error;
}
/* Access info about the screen. */
Screen* xScreen = XDefaultScreenOfDisplay(xDisplay);
GC gc = XDefaultGCOfScreen(xScreen);
Colormap xColormap = XDefaultColormapOfScreen(xScreen);
/* Create main X window */
xWindow = XCreateSimpleWindow(
xDisplay,
RootWindow(xDisplay, 0),
0, 0,
IMAGE_WIDTH*2,
IMAGE_HEIGHT*2,
0,
BlackPixel(xDisplay, 0),
BlackPixel(xDisplay, 0));
if (0 == xWindow)
{
printf("XCreateSimpleWindow failed\n");
returnCode = 1;
goto error;
}
XMapWindow(xDisplay, xWindow);
XSync(xDisplay, False);
/* Get the attributes associated with the main window. */
XWindowAttributes xWindowAttr;
if (!XGetWindowAttributes(xDisplay, xWindow, &xWindowAttr))
{
printf("XGetWindowAttributes failed\n");
returnCode = 1;
goto error;
}
/* Find the X render picture format associated with the visual */
/* for the main window */
XRenderPictFormat* xRenderPictFormatWindow =
XRenderFindVisualFormat(xDisplay, xWindowAttr.visual);
if (NULL == xRenderPictFormatWindow)
{
printf("XRenderFindVisualFormat failed\n");
returnCode = 1;
goto error;
}
/* Find the X render picture format associated with 8 bit alpha. */
XRenderPictFormat xRenderPictFormatTemplate;
xRenderPictFormatTemplate.depth = 8;
xRenderPictFormatTemplate.type = PictTypeDirect;
xRenderPictFormatTemplate.direct.alphaMask = 0x0FF;
unsigned long xRenderPictFormatTemplateMask =
PictFormatDepth | PictFormatType | PictFormatAlphaMask;
XRenderPictFormat* xRenderPictFormatMask =
XRenderFindFormat(
xDisplay,
xRenderPictFormatTemplateMask,
&xRenderPictFormatTemplate,
0);
if (NULL == xRenderPictFormatMask)
{
printf("XRenderFindFormat failed\n");
returnCode = 1;
goto error;
}
/* Create X render picture associated with the screen. */
/* Having the same visual format as the window. */
xPictureWindow = XRenderCreatePicture(
xDisplay,
xWindow,
xRenderPictFormatWindow,
0,
NULL);
if (0 == xPictureWindow)
{
printf("XRenderCreatePicture (window) failed\n");
returnCode = 1;
goto error;
}
/* Create backing pixmap for the main window. */
xPixmapMain = XCreatePixmap(
xDisplay,
xWindow,
xWindowAttr.width,
xWindowAttr.height,
xWindowAttr.depth);
if (0 == xPixmapMain)
{
printf("XCreatePixmap (main) failed\n");
returnCode = 1;
goto error;
}
/* Create X render picture associated with the backing pixmap. */
/* Having the same visual format as the window. */
xPictureMain = XRenderCreatePicture(
xDisplay,
xPixmapMain,
xRenderPictFormatWindow,
0,
NULL);
if (0 == xPictureMain)
{
printf("XRenderCreatePicture (main) failed\n");
returnCode = 1;
goto error;
}
/* Draw concentric rectangles of different gray. */
unsigned i;
for (i = 0; i < 256; ++i)
{
float fGray = i / 255.0;
/* Find the color gray. */
XcmsColor xColorGray;
xColorGray.spec.RGBi.red = fGray;
xColorGray.spec.RGBi.green = fGray;
xColorGray.spec.RGBi.blue = fGray;
xColorGray.format = XcmsRGBiFormat;
if (0 == XcmsAllocColor(
xDisplay,
xColormap,
&xColorGray,
XcmsRGBFormat))
{
printf("XcmsAllocColor failed\n");
returnCode = 1;
goto error;
}
/* Change the drawing color for the main window. */
XSetForeground(xDisplay, gc, xColorGray.pixel);
XDrawRectangle(
xDisplay,
xPixmapMain,
gc,
i, i,
(IMAGE_WIDTH - i) * 2 - 1,
(IMAGE_HEIGHT - i) * 2 - 1);
}
XRenderComposite(
xDisplay,
PictOpSrc,
xPictureMain, /* src */
0, /* mask */
xPictureWindow, /* dst */
0, 0, /* src (x,y) */
0, 0, /* mask (x,y) */
0, 0, /* dst (x,y) */
xWindowAttr.width,
xWindowAttr.height);
XSync(xDisplay, False);
/* Create pixmap for the overlay content. */
xPixmapOverlay = XCreatePixmap(
xDisplay,
xWindow,
IMAGE_WIDTH,
IMAGE_HEIGHT,
xWindowAttr.depth);
if (0 == xPixmapOverlay)
{
printf("XCreatePixmap (overlay) failed\n");
returnCode = 1;
goto error;
}
/* Create X render picture assocaited with the overlay pixmap. */
/* Having the same visual format as the window. */
xPictureOverlay = XRenderCreatePicture(
xDisplay,
xPixmapOverlay,
xRenderPictFormatWindow,
0,
NULL);
if (0 == xPictureOverlay)
{
printf("XRenderCreatePicture (overlay) failed\n");
returnCode = 1;
goto error;
}
/* Fill the overlay with black to be used for overlay color. */
XSetForeground(xDisplay, gc, XBlackPixelOfScreen(xScreen));
XFillRectangle(
xDisplay,
xPixmapOverlay,
gc,
0, 0,
IMAGE_WIDTH,
IMAGE_HEIGHT);
/* Create pixmap for the mask content. */
xPixmapMask = XCreatePixmap(
xDisplay,
xWindow,
IMAGE_WIDTH,
IMAGE_HEIGHT,
8);
if (0 == xPixmapMask)
{
printf("XCreatePixmap (mask) failed\n");
returnCode = 1;
goto error;
}
/* Create X render picture assocaited with the mask pixmap. */
xPictureMask = XRenderCreatePicture(
xDisplay,
xPixmapMask,
xRenderPictFormatMask,
0,
NULL);
if (0 == xPictureMask)
{
printf("XRenderCreatePicture (mask) failed\n");
returnCode = 1;
goto error;
}
/* Create a GC to go with mask */
gcMask = XCreateGC(xDisplay, xPixmapMask, 0, NULL);
XSetForeground(xDisplay, gcMask, 0x00000000);
XFillRectangle(
xDisplay,
xPixmapMask,
gcMask,
0, 0,
IMAGE_WIDTH,
IMAGE_HEIGHT);
XSetForeground(xDisplay, gcMask, 0x40404040);
XDrawRectangle(
xDisplay,
xPixmapMask,
gcMask,
0, 0,
IMAGE_WIDTH-1,
IMAGE_HEIGHT-1);
XFillArc(
xDisplay,
xPixmapMask,
gcMask,
100, 100,
100, 100,
0, /* start angle-degrees * 64 */
360 * 64); /* extent angle-degrees * 64 */
Bool bIncX = True;
Bool bIncY = True;
Bool bNextRow = False;
int x = 0;
int y = 0;
struct timeval timeStart;
gettimeofday(&timeStart, NULL);
int iter;
for (iter = 0; iter < numIterations; ++iter)
{
XRenderComposite(
xDisplay,
PictOpSrc,
xPictureMain, /* src */
0, /* mask */
xPictureWindow, /* dst */
x, y, /* src (x,y) */
0, 0, /* mask (x,y) */
x, /* dst x */
y, /* dst y */
IMAGE_WIDTH,
IMAGE_HEIGHT);
if (bNextRow)
{
if (bIncY)
{
if ((y += 10) >= IMAGE_HEIGHT)
{
y = IMAGE_HEIGHT - 1;
bIncY = False;
}
}
else
{
if ((y -= 10) < 0)
{
y = 0;
bIncY = True;
}
}
bNextRow = False;
}
else
{
if (bIncX)
{
if (++x >= IMAGE_WIDTH)
{
x = IMAGE_WIDTH - 1;
bIncX = False;
bNextRow = True;
}
}
else
{
if (--x < 0)
{
x = 0;
bIncX = True;
bNextRow = True;
}
}
}
XRenderComposite(
xDisplay,
PictOpOver,
xPictureOverlay,/* src */
xPictureMask, /* mask */
xPictureWindow, /* dst */
0, 0, /* src (x,y) */
0, 0, /* mask (x,y) */
x, /* dst x */
y, /* dst y */
IMAGE_WIDTH,
IMAGE_HEIGHT);
}
XSync(xDisplay, False);
struct timeval timeEnd;
gettimeofday(&timeEnd, NULL);
double elapsedSec =
getElapsedMicroseconds(&timeStart, &timeEnd) / 1000000L;
double fps = numIterations / elapsedSec;
printf("average update rate = %.1lf FPS\n", fps);
error:
if (0 != gcMask)
{
XFreeGC(xDisplay, gcMask);
gcMask = 0;
}
if (0 != xPictureMask)
{
XRenderFreePicture(xDisplay, xPictureMask);
xPictureMask = 0;
}
if (0 != xPixmapMask)
{
XFreePixmap(xDisplay, xPixmapMask);
xPixmapMask = 0;
}
if (0 != xPictureOverlay)
{
XRenderFreePicture(xDisplay, xPictureOverlay);
xPictureOverlay = 0;
}
if (0 != xPixmapOverlay)
{
XFreePixmap(xDisplay, xPixmapOverlay);
xPixmapOverlay = 0;
}
if (0 != xPictureMain)
{
XRenderFreePicture(xDisplay, xPictureMain);
xPictureMain = 0;
}
if (0 != xPixmapMain)
{
XFreePixmap(xDisplay, xPixmapMain);
xPixmapMain = 0;
}
if (0 != xPictureWindow)
{
XRenderFreePicture(xDisplay, xPictureWindow);
xPictureWindow = 0;
}
if (0 != xWindow)
{
XDestroyWindow(xDisplay, xWindow);
xWindow = 0;
}
if (NULL != xDisplay)
{
XCloseDisplay(xDisplay);
xDisplay = NULL;
}
return returnCode;
}