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/*******************************************************************************
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* duplicate definition of FT_Span
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struct LinearGradientData;
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struct RadialGradientData;
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struct ConicalGradientData;
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extern uint qt_gradient_pixel(const GradientData *data, double pos);
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struct BlendColorData {
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typedef void (*BlendColor)(void *target, const QSpan *span, QPainter::CompositionMode mode, const BlendColorData *data);
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typedef void (*Blend)(void *target, const QSpan *span,
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const qreal dx, const qreal dy,
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const void *image_bits, const int image_width, const int image_height,
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QPainter::CompositionMode mode);
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typedef void (*BlendTransformed)(void *target, const QSpan *span,
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const qreal ix, const qreal iy,
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const qreal dx, const qreal dy,
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const void *image_bits,
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const int image_width, const int image_height,
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QPainter::CompositionMode mode);
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typedef void (*BlendLinearGradient)(void *target,
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LinearGradientData *data,
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QPainter::CompositionMode mode);
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typedef void (*BlendRadialGradient)(void *target,
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RadialGradientData *data,
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QPainter::CompositionMode mode);
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typedef void (*BlendConicalGradient)(void *target,
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ConicalGradientData *data,
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QPainter::CompositionMode mode);
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BlendColor blendColor;
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BlendTransformed blendTransformed;
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BlendTransformed blendTransformedTiled;
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BlendTransformed blendTransformedBilinear;
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BlendTransformed blendTransformedBilinearTiled;
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BlendLinearGradient blendLinearGradient;
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BlendRadialGradient blendRadialGradient;
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BlendConicalGradient blendConicalGradient;
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extern DrawHelper qDrawHelper[DrawHelper::Layout_Count];
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void qInitDrawhelperAsm();
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QRasterBuffer *rasterBuffer;
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QGradient::Spread spread;
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#define GRADIENT_STOPTABLE_SIZE 1024
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uint colorTable[GRADIENT_STOPTABLE_SIZE];
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void initColorTable();
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struct LinearGradientData : public GradientData
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BlendLinearGradient blendFunc;
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QPainter::CompositionMode compositionMode;
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struct RadialGradientData : public GradientData
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BlendRadialGradient blendFunc;
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QPainter::CompositionMode compositionMode;
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struct ConicalGradientData : public GradientData
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void init(const QPointF ¢er, qreal angle, const QMatrix &matrix);
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BlendConicalGradient blendFunc;
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QPainter::CompositionMode compositionMode;
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inline int qt_div_255(int x) { return (x + (x>>8) + 0x80) >> 8; }
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inline uint INTERPOLATE_PIXEL_256(uint x, uint a, uint y, uint b) {
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uint t = (x & 0xff00ff) * a + (y & 0xff00ff) * b;
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x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b;
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inline uint INTERPOLATE_PIXEL_255(uint x, uint a, uint y, uint b) {
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uint t = (x & 0xff00ff) * a + (y & 0xff00ff) * b;
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t = (t + ((t >> 8) & 0xff00ff) + 0x800080) >> 8;
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x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b;
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x = (x + ((x >> 8) & 0xff00ff) + 0x800080);
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inline uint BYTE_MUL(uint x, uint a) {
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uint t = (x & 0xff00ff) * a;
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t = (t + ((t >> 8) & 0xff00ff) + 0x800080) >> 8;
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x = ((x >> 8) & 0xff00ff) * a;
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x = (x + ((x >> 8) & 0xff00ff) + 0x800080);
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inline uint PREMUL(uint x) {
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uint t = (x & 0xff00ff) * a;
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t = (t + ((t >> 8) & 0xff00ff) + 0x800080) >> 8;
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x = ((x >> 8) & 0xff) * a;
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x = (x + ((x >> 8) & 0xff) + 0x80);
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// possible implementation for 64 bit
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inline uint INTERPOLATE_PIXEL_256(uint x, uint a, uint y, uint b) {
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ulong t = (((ulong(x)) | ((ulong(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
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t += (((ulong(y)) | ((ulong(y)) << 24)) & 0x00ff00ff00ff00ff) * b;
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t &= 0x00ff00ff00ff00ff;
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return (uint(t)) | (uint(t >> 24));
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inline uint INTERPOLATE_PIXEL_255(uint x, uint a, uint y, uint b) {
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ulong t = (((ulong(x)) | ((ulong(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
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t += (((ulong(y)) | ((ulong(y)) << 24)) & 0x00ff00ff00ff00ff) * b;
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t = (t + ((t >> 8) & 0xff00ff00ff00ff) + 0x80008000800080);
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t &= 0x00ff00ff00ff00ff;
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return (uint(t)) | (uint(t >> 24));
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inline uint BYTE_MUL(uint x, uint a) {
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ulong t = (((ulong(x)) | ((ulong(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
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t = (t + ((t >> 8) & 0xff00ff00ff00ff) + 0x80008000800080);
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t &= 0x00ff00ff00ff00ff;
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return (uint(t)) | (uint(t >> 24));
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inline uint PREMUL(uint x) {
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ulong t = (((ulong(x)) | ((ulong(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
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t = (t + ((t >> 8) & 0xff00ff00ff00ff) + 0x80008000800080);
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t &= 0x00ff00ff00ff00ff;
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return (uint(t)) | (uint(t >> 24)) | 0xff000000;
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#define INV_PREMUL(p) \
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(qAlpha(p) == 0 ? 0 : \
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| (((255*qRed(p))/ qAlpha(p)) << 16) \
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| (((255*qGreen(p)) / qAlpha(p)) << 8) \
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| ((255*qBlue(p)) / qAlpha(p))))
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const uint qt_bayer_matrix[16][16] = {
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{ 0x1, 0xc0, 0x30, 0xf0, 0xc, 0xcc, 0x3c, 0xfc,
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0x3, 0xc3, 0x33, 0xf3, 0xf, 0xcf, 0x3f, 0xff},
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{ 0x80, 0x40, 0xb0, 0x70, 0x8c, 0x4c, 0xbc, 0x7c,
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0x83, 0x43, 0xb3, 0x73, 0x8f, 0x4f, 0xbf, 0x7f},
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{ 0x20, 0xe0, 0x10, 0xd0, 0x2c, 0xec, 0x1c, 0xdc,
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0x23, 0xe3, 0x13, 0xd3, 0x2f, 0xef, 0x1f, 0xdf},
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{ 0xa0, 0x60, 0x90, 0x50, 0xac, 0x6c, 0x9c, 0x5c,
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0xa3, 0x63, 0x93, 0x53, 0xaf, 0x6f, 0x9f, 0x5f},
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{ 0x8, 0xc8, 0x38, 0xf8, 0x4, 0xc4, 0x34, 0xf4,
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0xb, 0xcb, 0x3b, 0xfb, 0x7, 0xc7, 0x37, 0xf7},
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{ 0x88, 0x48, 0xb8, 0x78, 0x84, 0x44, 0xb4, 0x74,
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0x8b, 0x4b, 0xbb, 0x7b, 0x87, 0x47, 0xb7, 0x77},
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{ 0x28, 0xe8, 0x18, 0xd8, 0x24, 0xe4, 0x14, 0xd4,
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0x2b, 0xeb, 0x1b, 0xdb, 0x27, 0xe7, 0x17, 0xd7},
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{ 0xa8, 0x68, 0x98, 0x58, 0xa4, 0x64, 0x94, 0x54,
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0xab, 0x6b, 0x9b, 0x5b, 0xa7, 0x67, 0x97, 0x57},
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{ 0x2, 0xc2, 0x32, 0xf2, 0xe, 0xce, 0x3e, 0xfe,
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0x1, 0xc1, 0x31, 0xf1, 0xd, 0xcd, 0x3d, 0xfd},
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{ 0x82, 0x42, 0xb2, 0x72, 0x8e, 0x4e, 0xbe, 0x7e,
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0x81, 0x41, 0xb1, 0x71, 0x8d, 0x4d, 0xbd, 0x7d},
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{ 0x22, 0xe2, 0x12, 0xd2, 0x2e, 0xee, 0x1e, 0xde,
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0x21, 0xe1, 0x11, 0xd1, 0x2d, 0xed, 0x1d, 0xdd},
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{ 0xa2, 0x62, 0x92, 0x52, 0xae, 0x6e, 0x9e, 0x5e,
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0xa1, 0x61, 0x91, 0x51, 0xad, 0x6d, 0x9d, 0x5d},
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{ 0xa, 0xca, 0x3a, 0xfa, 0x6, 0xc6, 0x36, 0xf6,
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0x9, 0xc9, 0x39, 0xf9, 0x5, 0xc5, 0x35, 0xf5},
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{ 0x8a, 0x4a, 0xba, 0x7a, 0x86, 0x46, 0xb6, 0x76,
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0x89, 0x49, 0xb9, 0x79, 0x85, 0x45, 0xb5, 0x75},
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{ 0x2a, 0xea, 0x1a, 0xda, 0x26, 0xe6, 0x16, 0xd6,
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0x29, 0xe9, 0x19, 0xd9, 0x25, 0xe5, 0x15, 0xd5},
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{ 0xaa, 0x6a, 0x9a, 0x5a, 0xa6, 0x66, 0x96, 0x56,
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0xa9, 0x69, 0x99, 0x59, 0xa5, 0x65, 0x95, 0x55}