//-----------------------------------------------------------------------------
void CGDrawContext::applyLineStyle (CGContextRef context)
{
switch (currentState.lineStyle.getLineCap ())
{
case CLineStyle::kLineCapButt: CGContextSetLineCap (context, kCGLineCapButt); break;
case CLineStyle::kLineCapRound: CGContextSetLineCap (context, kCGLineCapRound); break;
case CLineStyle::kLineCapSquare: CGContextSetLineCap (context, kCGLineCapSquare); break;
}
switch (currentState.lineStyle.getLineJoin ())
{
case CLineStyle::kLineJoinMiter: CGContextSetLineJoin (context, kCGLineJoinMiter); break;
case CLineStyle::kLineJoinRound: CGContextSetLineJoin (context, kCGLineJoinRound); break;
case CLineStyle::kLineJoinBevel: CGContextSetLineJoin (context, kCGLineJoinBevel); break;
}
if (currentState.lineStyle.getDashCount () > 0)
{
CGFloat* dashLengths = new CGFloat [currentState.lineStyle.getDashCount ()];
for (int32_t i = 0; i < currentState.lineStyle.getDashCount (); i++)
{
dashLengths[i] = currentState.frameWidth * currentState.lineStyle.getDashLengths ()[i];
}
CGContextSetLineDash (context, currentState.lineStyle.getDashPhase (), dashLengths, currentState.lineStyle.getDashCount ());
delete [] dashLengths;
}
}
void GraphicsContext::setLineCap(LineCap cap)
{
if (paintingDisabled())
return;
switch (cap) {
case ButtCap:
CGContextSetLineCap(platformContext(), kCGLineCapButt);
break;
case RoundCap:
CGContextSetLineCap(platformContext(), kCGLineCapRound);
break;
case SquareCap:
CGContextSetLineCap(platformContext(), kCGLineCapSquare);
break;
}
}
bool GiCanvasIos::beginPaintBuffered(bool fast, bool autoscale)
{
if (m_draw->getContext() || !gs()
|| !m_draw->createBufferBitmap(m_draw->width(), m_draw->height(),
autoscale ? m_draw->_scale : 1.f)) {
return false;
}
RECT_2D clipBox = { 0, 0, m_draw->width(), m_draw->height() };
owner()->_beginPaint(clipBox);
m_draw->_fast = fast;
m_draw->_ctxused[0] = false;
m_draw->_ctxused[1] = false;
CGContextRef context = m_draw->getContext();
bool antiAlias = !fast && gs()->isAntiAliasMode();
CGContextSetAllowsAntialiasing(context, antiAlias);
CGContextSetShouldAntialias(context, antiAlias);
CGContextSetFlatness(context, fast ? 20 : 1);
CGContextSetLineCap(context, kCGLineCapRound);
CGContextSetLineJoin(context, kCGLineJoinRound);
owner()->setMaxPenWidth(-1, 0.5f / m_draw->_scale);
return true;
}
bool GiCanvasIos::beginPaint(CGContextRef context, bool fast, bool buffered)
{
if (m_draw->getContext() || !context)
return false;
if (gs()) {
CGRect rc = CGContextGetClipBoundingBox(context);
RECT_2D clipBox = { rc.origin.x, rc.origin.y,
rc.origin.x + rc.size.width, rc.origin.y + rc.size.height };
owner()->_beginPaint(clipBox);
}
m_draw->_context = context;
m_draw->_fast = fast;
m_draw->_ctxused[0] = false;
m_draw->_ctxused[1] = false;
if (buffered && gs()) {
m_draw->createBufferBitmap(m_draw->width(), m_draw->height(), m_draw->_scale);
context = m_draw->getContext();
}
bool antiAlias = !fast && (!gs() || gs()->isAntiAliasMode());
CGContextSetAllowsAntialiasing(context, antiAlias);
CGContextSetShouldAntialias(context, antiAlias);
CGContextSetFlatness(context, fast ? 20 : 1);
CGContextSetLineCap(context, kCGLineCapRound);
CGContextSetLineJoin(context, kCGLineJoinRound);
if (owner()) // 设置最小线宽为0.5像素，使用屏幕放大倍数以便得到实际像素值
owner()->setMaxPenWidth(-1, 0.5f / m_draw->_scale);
return true;
}
bool setPen(const GiContext* ctx)
{
bool changed = !_ctxused[0];
if (ctx && !ctx->isNullLine())
{
if (_gictx.getLineColor() != ctx->getLineColor()) {
_gictx.setLineColor(ctx->getLineColor());
changed = true;
}
if (_gictx.getLineWidth() != ctx->getLineWidth()) {
_gictx.setLineWidth(ctx->getLineWidth(), ctx->isAutoScale());
changed = true;
}
if (_gictx.getLineStyle() != ctx->getLineStyle()) {
_gictx.setLineStyle(ctx->getLineStyle());
changed = true;
}
}
if (!ctx) ctx = &_gictx;
if (!ctx->isNullLine() && changed)
{
_ctxused[0] = true;
GiColor color = ctx->getLineColor();
if (gs())
color = gs()->calcPenColor(color);
CGContextSetRGBStrokeColor(getContext(),
toFloat(color.r), toFloat(color.g),
toFloat(color.b), toFloat(color.a));
float w = ctx->getLineWidth();
w = gs() ? gs()->calcPenWidth(w, ctx->isAutoScale()) : (w < 0 ? -w : 1);
CGContextSetLineWidth(getContext(), _fast && w > 1 ? w - 1 : w); // 不是反走样就细一点
int style = ctx->getLineStyle();
CGFloat pattern[6];
if (style >= 0 && style < sizeof(lpats)/sizeof(lpats[0])) {
if (lpats[style].arr && !_fast) { // 快速画时不要线型
makeLinePattern(pattern, lpats[style].arr, lpats[style].n, w);
CGContextSetLineDash(getContext(), 0, pattern, lpats[style].n);
}
else {
CGContextSetLineDash(getContext(), 0, NULL, 0);
}
CGContextSetLineCap(getContext(), style > 0 ? kCGLineCapButt : kCGLineCapRound);
}
}
return !ctx->isNullLine();
}
static void Quartz_SetLineEnd(R_GE_lineend lend, NewDevDesc *dd)
{
QuartzDesc *xd = (QuartzDesc*)dd->deviceSpecific;
CGLineCap linecap;
switch (lend) {
case GE_ROUND_CAP:
linecap = kCGLineCapRound;
break;
case GE_BUTT_CAP:
linecap = kCGLineCapButt;
break;
case GE_SQUARE_CAP:
linecap = kCGLineCapSquare;
break;
default:
error(_("Invalid line end"));
}
CGContextSetLineCap( GetContext(xd), linecap);
}
static void initBackground(unsigned w, unsigned h, unsigned max)
{
CGColorSpaceRef colorspace;
CGContextRef gc;
unsigned char *data;
float cx, cy;
float radius, needle;
data = (unsigned char *)malloc(w * h * 4);
colorspace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
gc = CGBitmapContextCreate(data, w, h, 8, w * 4, colorspace,
kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host);
cx = CENTERX * w;
cy = CENTERY * h;
radius = 0.5 * (w > h ? w : h);
needle = radius * 0.85;
// background
CGContextTranslateCTM(gc, 0.0, h);
CGContextScaleCTM(gc, 1.0, -1.0);
CGContextClearRect(gc, CGRectMake(0, 0, w, h));
CGContextSetRGBFillColor(gc, 0.0, 0.0, 0.0, 0.7);
CGContextAddArc(gc, cx, cy, radius, 0, 2*M_PI, false);
CGContextFillPath(gc);
CGGradientRef gradient;
size_t num_locations = 2;
CGFloat locations[2] = { 0.0, 1.0 };
CGFloat components[8] = { 1.0, 1.0, 1.0, 0.5, // Start color
0.0, 0.0, 0.0, 0.0
}; // End color
gradient = CGGradientCreateWithColorComponents (colorspace, components,
locations, num_locations);
// top rim light
CGContextSaveGState(gc);
CGContextAddArc(gc, cx, cy, radius, 0, 2*M_PI, false);
CGContextAddArc(gc, cx, cy, needle*1.05, 0, 2*M_PI, false);
CGContextEOClip(gc);
CGContextDrawRadialGradient (gc, gradient,
CGPointMake(cx, cy*1.00), radius*1.01,
CGPointMake(cx, cy*0.96), radius*0.98, 0);
// bottom rim light
CGContextDrawRadialGradient (gc, gradient,
CGPointMake(cx, cy*1.00), radius*1.01,
CGPointMake(cx, cy*1.04), radius*0.98, 0);
// top bevel
CGContextDrawRadialGradient (gc, gradient,
CGPointMake(cx, cy*2.2), radius*0.2,
CGPointMake(cx, cy*1.0), radius*1.0, 0);
// bottom bevel
CGContextRestoreGState(gc);
CGContextSaveGState(gc);
CGContextAddArc(gc, cx, cy, needle*1.05, 0, 2*M_PI, false);
CGContextAddArc(gc, cx, cy, needle*0.96, 0, 2*M_PI, false);
CGContextEOClip(gc);
CGContextDrawRadialGradient (gc, gradient,
CGPointMake(cx, cy* -.5), radius*0.2,
CGPointMake(cx, cy*1.0), radius*1.0, 0);
CGGradientRelease(gradient);
CGContextRestoreGState(gc);
CGContextSetRGBFillColor(gc, 0.9, 0.9, 1.0, 1.0);
CGContextSetRGBStrokeColor(gc, 0.9, 0.9, 1.0, 1.0);
CGContextSetLineCap(gc, kCGLineCapRound);
// draw several glow passes, with the content offscreen
CGContextTranslateCTM(gc, 0, OFFSCREEN - 10);
CGContextSetShadowWithColor(gc, CGSizeMake(0, OFFSCREEN), 48.0, CGColorCreateGenericRGB(0.5, 0.5, 1.0, 0.7));
drawMarks(gc, w, h, max);
CGContextTranslateCTM(gc, 0, 20);
CGContextSetShadowWithColor(gc, CGSizeMake(0, OFFSCREEN), 48.0, CGColorCreateGenericRGB(0.5, 0.5, 1.0, 0.7));
drawMarks(gc, w, h, max);
CGContextTranslateCTM(gc, -10, -10);
CGContextSetShadowWithColor(gc, CGSizeMake(0, OFFSCREEN), 48.0, CGColorCreateGenericRGB(0.5, 0.5, 1.0, 0.7));
drawMarks(gc, w, h, max);
CGContextTranslateCTM(gc, 20, 0);
CGContextSetShadowWithColor(gc, CGSizeMake(0, OFFSCREEN), 48.0, CGColorCreateGenericRGB(0.5, 0.5, 1.0, 0.7));
drawMarks(gc, w, h, max);
CGContextTranslateCTM(gc, -10, -OFFSCREEN);
// draw real content
CGContextSetShadowWithColor(gc, CGSizeMake(0, 1), 6.0, CGColorCreateGenericRGB(0.7, 0.7, 1.0, 0.9));
drawMarks(gc, w, h, max);
glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8, w, h, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, data);
CGContextRelease(gc);
CGColorSpaceRelease(colorspace);
free(data);
}
void CFX_QuartzDeviceDriver::setStrokeInfo(const CFX_GraphStateData* graphState, FX_ARGB argb, FX_FLOAT lineWidth)
{
if (NULL == graphState) {
return;
}
CGContextSetLineWidth(_context, lineWidth);
CGLineCap cap;
switch (graphState->m_LineCap) {
case CFX_GraphStateData::LineCapRound: {
cap = kCGLineCapRound;
break;
}
case CFX_GraphStateData::LineCapSquare: {
cap = kCGLineCapSquare;
break;
}
case CFX_GraphStateData::LineCapButt:
default: {
cap = kCGLineCapButt;
}
}
CGContextSetLineCap(_context, cap);
CGLineJoin join;
switch (graphState->m_LineJoin) {
case CFX_GraphStateData::LineJoinRound: {
join = kCGLineJoinRound;
break;
}
case CFX_GraphStateData::LineJoinBevel: {
join = kCGLineJoinBevel;
break;
}
case CFX_GraphStateData::LineJoinMiter:
default: {
join = kCGLineJoinMiter;
}
}
CGContextSetLineJoin(_context, join);
if (graphState->m_DashCount) {
#if CGFLOAT_IS_DOUBLE
CGFloat* dashArray = new CGFloat[graphState->m_DashCount];
if (!dashArray) {
return;
}
for (int index = 0; index < graphState->m_DashCount; ++index) {
dashArray[index] = graphState->m_DashArray[index];
}
#else
CGFloat* dashArray = (CGFloat*)graphState->m_DashArray;
#endif
CGContextSetLineDash(_context, graphState->m_DashPhase, dashArray, graphState->m_DashCount);
#if CGFLOAT_IS_DOUBLE
delete[] dashArray;
#endif
}
FX_INT32 a, r, g, b;
ArgbDecode(argb, a, r, g, b);
CGContextSetRGBStrokeColor(_context,
r / 255.f,
g / 255.f,
b / 255.f,
a / 255.f);
}
void CGContextSetLineCap_wrap(CGContext *con, int cap) {
CGContextSetLineCap(con, CGLineCap(cap));
}
void MyTimerProc ( EventLoopTimerRef inTimer, void *inUserData )
{
WindowRef window = (WindowRef)inUserData;
static int i = 0;
static int j = 0;
static int step = 5;
GrafPtr curPort;
CGContextRef context;
CGrafPtr windowPort = GetWindowPort( window );
GetPort(&curPort);
SetPort(windowPort);
CreateCGContextForPort( windowPort, &context );
// Do our drawing in here
CGContextSetGrayFillColor( context, 0.0, 1.0 );
CGContextFillRect( context, CGRectMake( 0, 0, 800, 600 ) );
CGContextSetGrayFillColor( context, 1.0, 1.0 );
CGContextSetRGBStrokeColor( context, 1.0, 0.0, 0.0, 1.0 );
CGContextSetLineWidth( context, 5.0 );
CGContextSetLineCap( context, kCGLineCapRound );
CGContextSetLineJoin( context, kCGLineJoinRound );
CGContextSetMiterLimit( context, 5 );
// Draw each of the 4 transform demos
//
// 1. Translate - move the origin, draw the graphic
// Place the origin in the llh corner of the upper left quadrant
CGContextSaveGState( context );
CGContextTranslateCTM( context, i / 2, i / 2 + 300 );
CGContextRotateCTM( context, -2.0 * 3.1416 / 8 );
drawGraphic( context, 0, 0 );
CGContextRestoreGState( context );
// 2. Rotate - move origin, do rotation, draw the graphic
// Put the origin back into the llh corner of the upper right quadrant
CGContextSaveGState( context );
if ( j < 1000/2 )
{
// Rotate around left circle
CGContextTranslateCTM( context, 500, 450 );
CGContextRotateCTM( context, -j * 3.1416 * 2.0 / 500.0 - 3.1416 );
CGContextTranslateCTM( context, -100, -20 );
drawGraphic( context, 0, 0 );
}
if ( j >= 1000/2 )
{
// Rotate under bottom half and over top right 1/4
CGContextTranslateCTM( context, 700, 450 );
CGContextRotateCTM( context, j * 3.1416 * 2.0 / 500.0 );
CGContextScaleCTM( context, 1, 1 );
CGContextTranslateCTM( context, -100, 20 );
CGContextRotateCTM( context, 3.1416 );
drawGraphic( context, 0, 0 );
}
CGContextRestoreGState( context );
// 3. Scale - move origin, set scale, draw the graphic
CGContextSaveGState( context );
CGContextScaleCTM( context, i * 400.0 / 500.0 / 40.0, i * 300.0 / 500.0 / 40.0 );
CGContextRotateCTM( context, -3.1416 / 4 );
drawGraphic( context, 0, 0 );
CGContextRestoreGState( context );
// 4. Show the basic graphic
CGContextTranslateCTM( context, 600, 150 );
drawGraphic( context, 0, 0 );
CGContextFlush( context );
CGContextRelease( context );
SetPort ( curPort );
i += step;
j += abs( step );
if ( i >= 500 )
{
step = -step;
}
if ( i <= 0 )
{
step = -step;
j = 0;
}
}