xsTextSize xsCanvasContext::measureText(const xsTChar *text)
{
xsGraphics *gc = xsGetSystemGc();
xsTextSize size;
xsMeasureText(gc, text, xsTcsLen(text), &font, &size.width, &size.height);
return size;
}
void xsCanvasContext::clearRect(float x, float y, float width, float height)
{
xsGraphics *gc = xsGetSystemGc();
xsSetColor(gc, XS_COLOR_WHITE);
xsFillRectangle(gc, x, y, width, height);
xsFlushScreen(x, y, x + width, y + height);
}
void xsCanvasContext::strokeText(const xsTChar *text , float x, float y, xsU32 maxWidth)
{
xsGraphics *gc = xsGetSystemGc();
xsSetFont(gc, &font);
float width, height;
int count = xsTcsLen(text);
xsMeasureText(gc, text, count, &font, &width, &height);
maxWidth = maxWidth > width ? width : maxWidth;
switch(textAlign)
{
case XS_TEXT_ALIGN_START:
drawWithBaseline(text, count, x, y, maxWidth,0);
break;
case XS_TEXT_ALIGN_END:
drawWithBaseline(text, count, x - width, y, maxWidth, 0);
break;
case XS_TEXT_ALIGN_LEFT:
drawWithBaseline(text, count, x, y, maxWidth, 0);
break;
case XS_TEXT_ALIGN_CENTER:
drawWithBaseline(text, count, x - width/2, y, maxWidth, 0);
break;
case XS_TEXT_ALIGN_RIGHT:
drawWithBaseline(text, count, x - width, y, maxWidth, 0);
break;
}
}
void xsCanvasContext::drawImage(xsImage* image,float x, float y, float width, float height)
{
xsGraphics *gc = xsGetSystemGc();
float originW, originH;
xsGetImageDimension(image, &originW, &originH);
xsDrawImage(gc, image, x, y, width, height);
xsFlushScreen(x, y, x + width, y + height);
}
void xsCanvasContext::drawImage(xsImage* image,float x, float y)
{
xsGraphics *gc = xsGetSystemGc();
float originW, originH;
xsGetImageDimension(image, &originW, &originH);
xsDrawImage(gc, image, x, y, 0, 0);
xsRect clientRect;
xsFlushScreen(x, y, originW, originH);
}
int DemoApp::start()
{
xsColor color = {255,255,255,255};
xsSetColor(xsGetSystemGc(), color);
xsGetScreenDimension(&width, &height);
xsFillRectangle(xsGetSystemGc(), 0, 0, width, height);//, xsArgbToColor(0xFFFFFFFF));
xsFlushScreen(0, 0, width - 1, height - 1);
const char * js = getManifest()->getStartup();
invokeJavascript(js, LOAD_JS_STRING);
x = (width - BOX_SIZE) / 2;
y = (height - BOX_SIZE) / 2;
//img = this->getResource()->loadImage(xsT("logo-48x48.jpg"));
//timer = xsStartTimer(20, _onTimeout, this);
return XS_EC_OK;
}
void xsCanvasContext::translate(float x, float y)
{
xsGraphics *gc = xsGetSystemGc();
xsGcTranslate(gc, x, y);
xsRect clientRect;
if(xsGetClientRect(&clientRect))
{
xsFlushScreen(clientRect.left, clientRect.top, clientRect.right, clientRect.bottom);
}
}
void xsCanvasContext::fill()
{
xsGraphics *gc = xsGetSystemGc();
paintFill(gc);
xsRect clientRect;
if(xsGetClientRect(&clientRect))
{
xsFlushScreen(clientRect.left, clientRect.top, clientRect.right, clientRect.bottom);
}
}
void xsCanvasContext::drawWithBaseline(const xsTChar* text, int count, float x, float y, float maxWidth, int drawFlag)
{
xsGraphics *gc = xsGetSystemGc();
float width, height;
xsMeasureText(gc, text, count, &font, &width, &height);
if(drawFlag == 0)//stroke
{
switch(textBaseline)
{
case XS_BASELINE_ALPHABETIC:
break;
case XS_BASELINE_TOP:
xsDrawBorderText(gc, text, count, x, y, maxWidth, XS_COLOR_WHITE,strokeColor, XS_TRUE);
break;
case XS_BASELINE_HANGING:
xsDrawBorderText(gc, text, count, x, y, maxWidth, XS_COLOR_WHITE,strokeColor, XS_TRUE);
break;
case XS_BASELINE_MIDDLE:
xsDrawBorderText(gc, text, count, x, y + height/2, maxWidth, XS_COLOR_WHITE,strokeColor, XS_TRUE);
break;
case XS_BASELINE_IDEOGRAPHIC:
break;
case XS_BASELINE_BOTTOM:
xsDrawBorderText(gc, text, count, x, y - height/2, maxWidth, XS_COLOR_WHITE,strokeColor, XS_TRUE);
break;
}
}
else if(drawFlag == 1)//fill
{
switch(textBaseline)
{
case XS_BASELINE_ALPHABETIC:
break;
case XS_BASELINE_TOP:
xsDrawBorderText(gc, text, count, x, y, maxWidth, fillColor, XS_COLOR_WHITE, XS_FALSE);
break;
case XS_BASELINE_HANGING:
break;
case XS_BASELINE_MIDDLE:
xsDrawBorderText(gc, text, count, x, y + height/2, maxWidth, fillColor, XS_COLOR_WHITE, XS_FALSE);
break;
case XS_BASELINE_IDEOGRAPHIC:
break;
case XS_BASELINE_BOTTOM:
xsDrawBorderText(gc, text, count, x, y - height/2, maxWidth, fillColor, XS_COLOR_WHITE, XS_FALSE);
break;
}
}
int screenWidth, screenHeight;
xsGetScreenDimension(&screenWidth, &screenHeight);
xsFlushScreen(0, 0, screenWidth - 1, screenHeight - 1);
}
void xsCanvasContext::drawImage(xsImage* image,float sx, float sy, float swidth, float sheight, float x, float y, float width, float height)
{
xsGraphics *gc = xsGetSystemGc();
xsRect clipRect;
clipRect.left = x;
clipRect.top = y;
clipRect.right = x + width;
clipRect.bottom = y + height;
xsSetClipRect(gc, &clipRect);
float originW, originH;
xsGetImageDimension(image, &originW, &originH);
xsDrawImage(gc, image, x - sx, y - sy, originW * width/swidth, originH*height/sheight);
xsResetClipRect(gc);
xsFlushScreen(clipRect.left, clipRect.top, clipRect.right, clipRect.bottom);
}
void xsCanvasContext::strokeRect(float x, float y, float width, float height)
{
xsGraphics *gc = xsGetSystemGc();
int i;
lineWidth = lineWidth > 1.0 ? lineWidth : 1.0;
//another way to draw rectangle with specified linwWidth.
// xsFillRectangle(gc, x - lineWidth + 1, y - lineWidth + 1, width + 2 * (lineWidth - 1), height + 2 * (lineWidth - 1), strokeColor);
// xsFillRectangle(gc, x, y, width, height, XS_COLOR_WHITE);
xsSetColor(gc, strokeColor);
for(i = 0; i < lineWidth; i++)
{
xsDrawRectangle(gc, x - i, y - i, width + 2*i, height + 2*i);
}
xsFlushScreen(x - lineWidth, y - lineWidth, x + width + 2*lineWidth, y + height + 2*lineWidth);
}
static gboolean on_expose(GtkWidget *widget, GdkEventExpose *event,
gpointer data)
{
cairo_t *cr = gdk_cairo_create(widget->window);
xsGraphics *gc = xsGetSystemGc();
cr = gdk_cairo_create(widget->window);
//gdk_cairo_region(cr, event->region);
cairo_set_source_surface(cr, XS_SURFACE(gc), 0, 0);
cairo_paint(cr);
cairo_destroy (cr);
return FALSE;
}
int DemoApp::onTimeout()
{
xsGraphics *gc = xsGetSystemGc();
// clear
xsColor color = {255, 255, 255, 255};
xsSetColor(gc, color);
xsFillRectangle(gc, x, y, BOX_SIZE, BOX_SIZE);//, xsArgbToColor(0xFFFFFFFF));
// draw new box
x += rateX;
y += rateY;
if (x < 0 || x + BOX_SIZE > width)
rateX = -rateX;
if (y < 0 || y + BOX_SIZE > height)
rateY = -rateY;
xsDrawImage(gc, img, x, y, 0, 0);
xsFlushScreen(0, 0, width - 1, height - 1);
return 0;
}
void xsCanvasContext::transform(float xx, float yx, float xy, float yy, float x0, float y0)
{
xsGcTransform(xsGetSystemGc(), xx, yx, xy, yy, x0, y0);
}
void xsCanvasContext::rotate(float angle)
{
xsGcRotate(xsGetSystemGc(), angle);
}
void xsCanvasContext::scale(float scalewidth, float scaleheight)
{
xsGcScale(xsGetSystemGc(), scalewidth, scaleheight);
}
