void Gradient::paint(GraphicsContext* context)
{
#ifdef BUILDING_ON_TIGER
CGContextDrawShading(context->platformContext(), platformGradient());
#else
CGGradientDrawingOptions extendOptions = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;
if (m_radial)
CGContextDrawRadialGradient(context->platformContext(), platformGradient(), m_p0, m_r0, m_p1, m_r1, extendOptions);
else
CGContextDrawLinearGradient(context->platformContext(), platformGradient(), m_p0, m_p1, extendOptions);
#endif
}
void JBGFillGradientCircle(CGContextRef ctx, CGPoint center_1, CGFloat r_1, CGPoint center_2, CGFloat r_2, CGGradientRef fill_gradient, CGColorRef stroke_color)
{
if (fill_gradient)
{
CGGradientDrawingOptions options = kCGGradientDrawsBeforeStartLocation;
CGContextDrawRadialGradient(ctx, fill_gradient, center_1, r_1, center_2, r_2, options);
}
if (stroke_color)
{
CGContextSetStrokeColorWithColor(ctx, stroke_color);
CGContextAddArc(ctx, center_2.x, center_2.y, r_2, 0, M_PI * 2, false);
CGContextStrokePath(ctx);
}
}
//-----------------------------------------------------------------------------
void CGDrawContext::fillRadialGradient (CGraphicsPath* _path, const CGradient& gradient, const CPoint& center, CCoord radius, const CPoint& originOffset, bool evenOdd, CGraphicsTransform* t)
{
QuartzGraphicsPath* path = dynamic_cast<QuartzGraphicsPath*> (_path);
if (path == 0)
return;
const QuartzGradient* cgGradient = dynamic_cast<const QuartzGradient*> (&gradient);
if (cgGradient == 0)
return;
CGContextRef context = beginCGContext (true, getDrawMode ().integralMode ());
if (context)
{
if (getDrawMode ().integralMode ())
{
path->pixelAlign (this, t);
CGContextAddPath (context, path->getCGPathRef ());
}
else if (t)
{
CGContextSaveGState (context);
CGAffineTransform transform = QuartzGraphicsPath::createCGAffineTransform (*t);
CGContextConcatCTM (context, transform);
CGContextAddPath (context, path->getCGPathRef ());
CGContextRestoreGState (context);
}
else
CGContextAddPath (context, path->getCGPathRef ());
if (evenOdd)
CGContextEOClip (context);
else
CGContextClip (context);
CPoint startCenter = center + originOffset;
CGContextDrawRadialGradient (context, *cgGradient, CGPointFromCPoint (startCenter), 0, CGPointFromCPoint (center), static_cast<CGFloat> (radius), kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation);
releaseCGContext (context);
}
}
void Gradient::paint(CGContextRef context)
{
CGGradientDrawingOptions extendOptions = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;
if (!m_radial) {
CGContextDrawLinearGradient(context, platformGradient(), m_p0, m_p1, extendOptions);
return;
}
bool needScaling = aspectRatio() != 1;
if (needScaling) {
CGContextSaveGState(context);
// Scale from the center of the gradient. We only ever scale non-deprecated gradients,
// for which m_p0 == m_p1.
ASSERT(m_p0 == m_p1);
CGContextTranslateCTM(context, m_p0.x(), m_p0.y());
CGContextScaleCTM(context, 1, 1 / aspectRatio());
CGContextTranslateCTM(context, -m_p0.x(), -m_p0.y());
}
CGContextDrawRadialGradient(context, platformGradient(), m_p0, m_r0, m_p1, m_r1, extendOptions);
if (needScaling)
CGContextRestoreGState(context);
}
static void initNeedle(unsigned w, unsigned h, unsigned max)
{
CGColorSpaceRef colorspace;
CGContextRef gc;
unsigned char *data;
float cx, cy;
float angle, 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;
CGContextTranslateCTM(gc, 0.0, h);
CGContextScaleCTM(gc, 1.0, -1.0);
CGContextClearRect(gc, CGRectMake(0, 0, w, h));
angle = 0;//angleForValue(0, max);
{
// draw glow reflecting on inner bevel
float dx, dy;
dx = -cos(angle) + 1;
dy = -sin(angle) + 1;
CGGradientRef gradient;
size_t num_locations = 2;
CGFloat locations[2] = { 0.0, 1.0 };
CGFloat components[8] = { 0.7, 0.7, 1.0, 0.7, // Start color
0.0, 0.0, 0.0, 0.0
}; // End color
gradient = CGGradientCreateWithColorComponents (colorspace, components,
locations, num_locations);
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*dx, cy*dy), radius*0.1,
CGPointMake(cx*1.0, cy*1.0), radius*1.0, 0);
CGContextRestoreGState(gc);
}
CGContextSetRGBFillColor(gc, 0.9, 0.9, 1.0, 1.0);
// 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));
drawNeedle(gc, w, h, angle);
CGContextTranslateCTM(gc, 0, 20);
CGContextSetShadowWithColor(gc, CGSizeMake(0, OFFSCREEN), 48.0, CGColorCreateGenericRGB(0.5, 0.5, 1.0, 0.7));
drawNeedle(gc, w, h, angle);
CGContextTranslateCTM(gc, -10, -10);
CGContextSetShadowWithColor(gc, CGSizeMake(0, OFFSCREEN), 48.0, CGColorCreateGenericRGB(0.5, 0.5, 1.0, 0.7));
drawNeedle(gc, w, h, angle);
CGContextTranslateCTM(gc, 20, 0);
CGContextSetShadowWithColor(gc, CGSizeMake(0, OFFSCREEN), 48.0, CGColorCreateGenericRGB(0.5, 0.5, 1.0, 0.7));
drawNeedle(gc, w, h, angle);
CGContextTranslateCTM(gc, -10, -OFFSCREEN);
// draw real content
CGContextSetShadowWithColor(gc, CGSizeMake(0, 1), 6.0, CGColorCreateGenericRGB(0.0, 0.0, 0.5, 0.7));
drawNeedle(gc, w, h, angle);
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);
}
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);
}
