drawing - IOS: CGRect is right, but UIImage flipped -


i know have translate coordinate system, when drawing. thing when use:

cgcontexttranslatectm(_context, 0.0, _size.height); cgcontextscalectm(_context, 1.0, -1.0);

my rect of image flipped, , image 'non-flipped', if dont use above image flipped, , rect non-flipped.

here's code:

cgrectmake(60, 100, image.size.width, image.size.height); cgcontextsavegstate(_context); uigraphicsbeginimagecontext(image.size); cgcontextclearrect(_context, placeholderrect); cgcontextdrawimage(_context, placeholderrect, image.cgimage); uigraphicsendimagecontext(); cgcontextrestoregstate(_context);

how maintain rect (non-flipped), while image flipped?

thanks

the trick may lie in uiimage method

+ (uiimage *)imagewithcgimage:(cgimageref)imageref scale:(cgfloat)scale orientation:(uiimageorientation)orientation

where orientation 1 of these :)

typedef enum {    uiimageorientationup,    uiimageorientationdown,   // 180 deg rotation    uiimageorientationleft,   // 90 deg ccw    uiimageorientationright,   // 90 deg cw    uiimageorientationupmirrored,    // above image mirrored along other axis. horizontal flip    uiimageorientationdownmirrored,  // horizontal flip    uiimageorientationleftmirrored,  // vertical flip    uiimageorientationrightmirrored, // vertical flip } uiimageorientation;

edit: update

i did simple code sample in uiview subclass overriding drawrect , worked perfectly. doesn't use uiimage method works same.

uiimage *image = [uiimage imagenamed:@"image.png"];  cgcontextref _context = uigraphicsgetcurrentcontext();  cgcontextsavegstate(_context);  cgcontextdrawimage(_context, cgrectmake(100, 20, image.size.width, image.size.height), image.cgimage);  cgcontextscalectm(_context, -1.0f, 1.0f);  cgcontextdrawimage(_context, cgrectmake(-300, 20, image.size.width, image.size.height), image.cgimage);  cgcontextrestoregstate(_context);

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