Merge branch '4.7' of git@scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.7

4 files changed, 115 insertions, 262 deletions

diff --git a/src/gui/painting/qbezier.cpp b/src/gui/painting/qbezier.cpp
index ea7fe4f..a08c79e 100644
--- a/src/gui/painting/qbezier.cpp
+++ b/src/gui/painting/qbezier.cpp
@@ -117,8 +117,8 @@ QBezier QBezier::mapBy(const QTransform &transform) const
     return QBezier::fromPoints(transform.map(pt1()), transform.map(pt2()), transform.map(pt3()), transform.map(pt4()));
 }
 
-//0.5 is really low
-static const qreal flatness = 0.5;
+//0.05 is really low, but required for scaled-up beziers...
+static const qreal flatness = 0.05;
 
 //based on "Fast, precise flattening of cubic Bezier path and offset curves"
 //      by T. F. Hain, A. L. Ahmad, S. V. R. Racherla and D. D. Langan
diff --git a/src/gui/painting/qbrush.cpp b/src/gui/painting/qbrush.cpp
index a82d0f9..182cce9 100644
--- a/src/gui/painting/qbrush.cpp
+++ b/src/gui/painting/qbrush.cpp
@@ -989,7 +989,8 @@ QDebug operator<<(QDebug dbg, const QBrush &b)
      "LinearGradientPattern",
      "RadialGradientPattern",
      "ConicalGradientPattern",
-     "TexturePattern"
+     0, 0, 0, 0, 0, 0,
+     "TexturePattern" // 24
     };
 
     dbg.nospace() << "QBrush(" << b.color() << ',' << BRUSH_STYLES[b.style()] << ')';
diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
index 917b910..a0c9828 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -70,8 +70,10 @@ static uint gccBug(uint value)
   constants and structures
 */
 
-static const int fixed_scale = 1 << 16;
-static const int half_point = 1 << 15;
+enum {
+    fixed_scale = 1 << 16,
+    half_point = 1 << 15
+};
 static const int buffer_size = 2048;
 
 struct LinearGradientValues
@@ -691,37 +693,32 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
         fy -= half_point;
         while (b < end) {
             int x1 = (fx >> 16);
-            int x2 = x1 + 1;
+            int x2;
             int y1 = (fy >> 16);
-            int y2 = y1 + 1;
-
-            int distx = ((fx - (x1 << 16)) >> 8);
-            int disty = ((fy - (y1 << 16)) >> 8);
-            int idistx = 256 - distx;
-            int idisty = 256 - disty;
+            int y2;
 
             if (blendType == BlendTransformedBilinearTiled) {
                 x1 %= image_width;
+                if (x1 < 0) x1 += image_width;
+                x2 = x1 + 1;
                 x2 %= image_width;
-                y1 %= image_height;
-                y2 %= image_height;
 
-                if (x1 < 0) x1 += image_width;
-                if (x2 < 0) x2 += image_width;
+                y1 %= image_height;
                 if (y1 < 0) y1 += image_height;
-                if (y2 < 0) y2 += image_height;
-
-                Q_ASSERT(x1 >= 0 && x1 < image_width);
-                Q_ASSERT(x2 >= 0 && x2 < image_width);
-                Q_ASSERT(y1 >= 0 && y1 < image_height);
-                Q_ASSERT(y2 >= 0 && y2 < image_height);
+                y2 = y1 + 1;
+                y2 %= image_height;
             } else {
                 x1 = qBound(0, x1, image_width - 1);
-                x2 = qBound(0, x2, image_width - 1);
+                x2 = qMin(x1 + 1, image_width - 1);
                 y1 = qBound(0, y1, image_height - 1);
-                y2 = qBound(0, y2, image_height - 1);
+                y2 = qMin(y1 + 1, image_height - 1);
             }
 
+            Q_ASSERT(x1 >= 0 && x1 < image_width);
+            Q_ASSERT(x2 >= 0 && x2 < image_width);
+            Q_ASSERT(y1 >= 0 && y1 < image_height);
+            Q_ASSERT(y2 >= 0 && y2 < image_height);
+
             const uchar *s1 = data->texture.scanLine(y1);
             const uchar *s2 = data->texture.scanLine(y2);
 
@@ -730,6 +727,11 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
             uint bl = fetch(s2, x1, data->texture.colorTable);
             uint br = fetch(s2, x2, data->texture.colorTable);
 
+            int distx = (fx & 0x0000ffff) >> 8;
+            int disty = (fy & 0x0000ffff) >> 8;
+            int idistx = 256 - distx;
+            int idisty = 256 - disty;
+
             uint xtop = INTERPOLATE_PIXEL_256(tl, idistx, tr, distx);
             uint xbot = INTERPOLATE_PIXEL_256(bl, idistx, br, distx);
             *b = INTERPOLATE_PIXEL_256(xtop, idisty, xbot, disty);
@@ -753,9 +755,9 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
             const qreal py = fy * iw - 0.5;
 
             int x1 = int(px) - (px < 0);
-            int x2 = x1 + 1;
+            int x2;
             int y1 = int(py) - (py < 0);
-            int y2 = y1 + 1;
+            int y2;
 
             int distx = int((px - x1) * 256);
             int disty = int((py - y1) * 256);
@@ -764,26 +766,26 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
 
             if (blendType == BlendTransformedBilinearTiled) {
                 x1 %= image_width;
+                if (x1 < 0) x1 += image_width;
+                x2 = x1 + 1;
                 x2 %= image_width;
-                y1 %= image_height;
-                y2 %= image_height;
 
-                if (x1 < 0) x1 += image_width;
-                if (x2 < 0) x2 += image_width;
+                y1 %= image_height;
                 if (y1 < 0) y1 += image_height;
-                if (y2 < 0) y2 += image_height;
-
-                Q_ASSERT(x1 >= 0 && x1 < image_width);
-                Q_ASSERT(x2 >= 0 && x2 < image_width);
-                Q_ASSERT(y1 >= 0 && y1 < image_height);
-                Q_ASSERT(y2 >= 0 && y2 < image_height);
+                y2 = y1 + 1;
+                y2 %= image_height;
             } else {
                 x1 = qBound(0, x1, image_width - 1);
-                x2 = qBound(0, x2, image_width - 1);
+                x2 = qMin(x1 + 1, image_width - 1);
                 y1 = qBound(0, y1, image_height - 1);
-                y2 = qBound(0, y2, image_height - 1);
+                y2 = qMin(y1 + 1, image_height - 1);
             }
 
+            Q_ASSERT(x1 >= 0 && x1 < image_width);
+            Q_ASSERT(x2 >= 0 && x2 < image_width);
+            Q_ASSERT(y1 >= 0 && y1 < image_height);
+            Q_ASSERT(y2 >= 0 && y2 < image_height);
+
             const uchar *s1 = data->texture.scanLine(y1);
             const uchar *s2 = data->texture.scanLine(y2);
 
@@ -5141,7 +5143,7 @@ static void blend_tiled_rgb444(int count, const QSpan *spans, void *userData)
 }
 
 
-template <SpanMethod spanMethod>
+template <SpanMethod spanMethod, TextureBlendType blendType>  /* blendType must be either BlendTransformedBilinear or BlendTransformedBilinearTiled */
 Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const QSpan *spans, void *userData)
 {
     QSpanData *data = reinterpret_cast<QSpanData *>(userData);
@@ -5154,10 +5156,12 @@ Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const
     CompositionFunction func = functionForMode[data->rasterBuffer->compositionMode];
     uint buffer[buffer_size];
 
-    int image_x1 = data->texture.x1;
-    int image_y1 = data->texture.y1;
-    int image_x2 = data->texture.x2;
-    int image_y2 = data->texture.y2;
+    const int image_x1 = data->texture.x1;
+    const int image_y1 = data->texture.y1;
+    const int image_x2 = data->texture.x2;
+    const int image_y2 = data->texture.y2;
+    const int image_width = data->texture.width;
+    const int image_height = data->texture.height;
     const int scanline_offset = data->texture.bytesPerLine / 4;
 
     if (data->fast_matrix) {
@@ -5187,19 +5191,31 @@ Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const
                 uint *b = buffer;
                 while (b < end) {
                     int x1 = (x >> 16);
-                    int x2 = x1 + 1;
+                    int x2;
                     int y1 = (y >> 16);
-                    int y2 = y1 + 1;
-
-                    int distx = ((x - (x1 << 16)) >> 8);
-                    int disty = ((y - (y1 << 16)) >> 8);
-                    int idistx = 256 - distx;
-                    int idisty = 256 - disty;
-
-                    x1 = qBound(image_x1, x1, image_x2 - 1);
-                    x2 = qBound(image_x1, x2, image_x2 - 1);
-                    y1 = qBound(image_y1, y1, image_y2 - 1);
-                    y2 = qBound(image_y1, y2, image_y2 - 1);
+                    int y2;
+
+                    if (blendType == BlendTransformedBilinearTiled) {
+                        x1 %= image_width;
+                        if (x1 < 0) x1 += image_width;
+                        x2 = x1 + 1;
+                        x2 %= image_width;
+
+                        y1 %= image_height;
+                        if (y1 < 0) y1 += image_height;
+                        y2 = y1 + 1;
+                        y2 %= image_height;
+
+                        Q_ASSERT(x1 >= 0 && x1 < image_width);
+                        Q_ASSERT(x2 >= 0 && x2 < image_width);
+                        Q_ASSERT(y1 >= 0 && y1 < image_height);
+                        Q_ASSERT(y2 >= 0 && y2 < image_height);
+                    } else {
+                        x1 = qBound(image_x1, x1, image_x2 - 1);
+                        x2 = qMin(x1 + 1, image_x2 - 1);
+                        y1 = qBound(image_y1, y1, image_y2 - 1);
+                        y2 = qMin(y1 + 1, image_y2 - 1);
+                    }
 
                     int y1_offset = y1 * scanline_offset;
                     int y2_offset = y2 * scanline_offset;
@@ -5216,6 +5232,11 @@ Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const
                     uint br = image_bits[y2_offset + x2];
 #endif
 
+                    int distx = (x & 0x0000ffff) >> 8;
+                    int disty = (y & 0x0000ffff) >> 8;
+                    int idistx = 256 - distx;
+                    int idisty = 256 - disty;
+
                     uint xtop = INTERPOLATE_PIXEL_256(tl, idistx, tr, distx);
                     uint xbot = INTERPOLATE_PIXEL_256(bl, idistx, br, distx);
                     *b = INTERPOLATE_PIXEL_256(xtop, idisty, xbot, disty);
@@ -5265,19 +5286,36 @@ Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_argb(int count, const
                     const qreal py = y * iw - 0.5;
 
                     int x1 = int(px) - (px < 0);
-                    int x2 = x1 + 1;
+                    int x2;
                     int y1 = int(py) - (py < 0);
-                    int y2 = y1 + 1;
+                    int y2;
 
                     int distx = int((px - x1) * 256);
                     int disty = int((py - y1) * 256);
                     int idistx = 256 - distx;
                     int idisty = 256 - disty;
 
-                    x1 = qBound(image_x1, x1, image_x2 - 1);
-                    x2 = qBound(image_x1, x2, image_x2 - 1);
-                    y1 = qBound(image_y1, y1, image_y2 - 1);
-                    y2 = qBound(image_y1, y2, image_y2 - 1);
+                    if (blendType == BlendTransformedBilinearTiled) {
+                        x1 %= image_width;
+                        if (x1 < 0) x1 += image_width;
+                        x2 = x1 + 1;
+                        x2 %= image_width;
+
+                        y1 %= image_height;
+                        if (y1 < 0) y1 += image_height;
+                        y2 = y1 + 1;
+                        y2 %= image_height;
+
+                        Q_ASSERT(x1 >= 0 && x1 < image_width);
+                        Q_ASSERT(x2 >= 0 && x2 < image_width);
+                        Q_ASSERT(y1 >= 0 && y1 < image_height);
+                        Q_ASSERT(y2 >= 0 && y2 < image_height);
+                    } else {
+                        x1 = qBound(image_x1, x1, image_x2 - 1);
+                        x2 = qMin(x1 + 1, image_x2 - 1);
+                        y1 = qBound(image_y1, y1, image_y2 - 1);
+                        y2 = qMin(y1 + 1, image_y2 - 1);
+                    }
 
                     int y1_offset = y1 * scanline_offset;
                     int y2_offset = y2 * scanline_offset;
@@ -5370,8 +5408,9 @@ Q_STATIC_TEMPLATE_FUNCTION void blendTransformedBilinear(int count, const QSpan
                     int y1 = (y >> 16);
                     int y2 = y1 + 1;
 
-                    const int distx = ((x - (x1 << 16)) >> 8);
-                    const int disty = ((y - (y1 << 16)) >> 8);
+                    const int distx = (x & 0x0000ffff) >> 8;
+                    const int disty = (y & 0x0000ffff) >> 8;
+
                     x1 = qBound(src_minx, x1, src_maxx);
                     x2 = qBound(src_minx, x2, src_maxx);
                     y1 = qBound(src_miny, y1, src_maxy);
@@ -5646,197 +5685,6 @@ static void blend_transformed_bilinear_rgb444(int count, const QSpan *spans, voi
 }
 
 template <SpanMethod spanMethod>
-Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_bilinear_tiled_argb(int count, const QSpan *spans, void *userData)
-{
-    QSpanData *data = reinterpret_cast<QSpanData *>(userData);
-    if (data->texture.format != QImage::Format_ARGB32_Premultiplied
-        && data->texture.format != QImage::Format_RGB32) {
-        blend_src_generic<spanMethod>(count, spans, userData);
-        return;
-    }
-
-    CompositionFunction func = functionForMode[data->rasterBuffer->compositionMode];
-    uint buffer[buffer_size];
-
-    int image_width = data->texture.width;
-    int image_height = data->texture.height;
-    const int scanline_offset = data->texture.bytesPerLine / 4;
-
-    if (data->fast_matrix) {
-        // The increment pr x in the scanline
-        int fdx = (int)(data->m11 * fixed_scale);
-        int fdy = (int)(data->m12 * fixed_scale);
-
-        while (count--) {
-            void *t = data->rasterBuffer->scanLine(spans->y);
-
-            uint *target = ((uint *)t) + spans->x;
-            uint *image_bits = (uint *)data->texture.imageData;
-
-            const qreal cx = spans->x + 0.5;
-            const qreal cy = spans->y + 0.5;
-
-            int x = int((data->m21 * cy
-                         + data->m11 * cx + data->dx) * fixed_scale) - half_point;
-            int y = int((data->m22 * cy
-                         + data->m12 * cx + data->dy) * fixed_scale) - half_point;
-
-            int length = spans->len;
-            const int coverage = (spans->coverage * data->texture.const_alpha) >> 8;
-            while (length) {
-                int l = qMin(length, buffer_size);
-                const uint *end = buffer + l;
-                uint *b = buffer;
-                while (b < end) {
-                    int x1 = (x >> 16);
-                    int x2 = (x1 + 1);
-                    int y1 = (y >> 16);
-                    int y2 = (y1 + 1);
-
-                    int distx = ((x - (x1 << 16)) >> 8);
-                    int disty = ((y - (y1 << 16)) >> 8);
-                    int idistx = 256 - distx;
-                    int idisty = 256 - disty;
-
-                    x1 %= image_width;
-                    x2 %= image_width;
-                    y1 %= image_height;
-                    y2 %= image_height;
-
-                    if (x1 < 0) x1 += image_width;
-                    if (x2 < 0) x2 += image_width;
-                    if (y1 < 0) y1 += image_height;
-                    if (y2 < 0) y2 += image_height;
-
-                    Q_ASSERT(x1 >= 0 && x1 < image_width);
-                    Q_ASSERT(x2 >= 0 && x2 < image_width);
-                    Q_ASSERT(y1 >= 0 && y1 < image_height);
-                    Q_ASSERT(y2 >= 0 && y2 < image_height);
-
-                    int y1_offset = y1 * scanline_offset;
-                    int y2_offset = y2 * scanline_offset;
-
-#if defined(Q_IRIX_GCC3_3_WORKAROUND)
-                    uint tl = gccBug(image_bits[y1_offset + x1]);
-                    uint tr = gccBug(image_bits[y1_offset + x2]);
-                    uint bl = gccBug(image_bits[y2_offset + x1]);
-                    uint br = gccBug(image_bits[y2_offset + x2]);
-#else
-                    uint tl = image_bits[y1_offset + x1];
-                    uint tr = image_bits[y1_offset + x2];
-                    uint bl = image_bits[y2_offset + x1];
-                    uint br = image_bits[y2_offset + x2];
-#endif
-
-                    uint xtop = INTERPOLATE_PIXEL_256(tl, idistx, tr, distx);
-                    uint xbot = INTERPOLATE_PIXEL_256(bl, idistx, br, distx);
-                    *b = INTERPOLATE_PIXEL_256(xtop, idisty, xbot, disty);
-                    ++b;
-                    x += fdx;
-                    y += fdy;
-                }
-                if (spanMethod == RegularSpans)
-                    func(target, buffer, l, coverage);
-                else
-                    drawBufferSpan(data, buffer, buffer_size,
-                                   spans->x + spans->len - length,
-                                   spans->y, l, coverage);
-                target += l;
-                length -= l;
-            }
-            ++spans;
-        }
-    } else {
-        const qreal fdx = data->m11;
-        const qreal fdy = data->m12;
-        const qreal fdw = data->m13;
-        while (count--) {
-            void *t = data->rasterBuffer->scanLine(spans->y);
-
-            uint *target = ((uint *)t) + spans->x;
-            uint *image_bits = (uint *)data->texture.imageData;
-
-            const qreal cx = spans->x + 0.5;
-            const qreal cy = spans->y + 0.5;
-
-            qreal x = data->m21 * cy + data->m11 * cx + data->dx;
-            qreal y = data->m22 * cy + data->m12 * cx + data->dy;
-            qreal w = data->m23 * cy + data->m13 * cx + data->m33;
-
-            int length = spans->len;
-            const int coverage = (spans->coverage * data->texture.const_alpha) >> 8;
-            while (length) {
-                int l = qMin(length, buffer_size);
-                const uint *end = buffer + l;
-                uint *b = buffer;
-                while (b < end) {
-                    const qreal iw = w == 0 ? 1 : 1 / w;
-                    const qreal px = x * iw - 0.5;
-                    const qreal py = y * iw - 0.5;
-
-                    int x1 = int(px) - (px < 0);
-                    int x2 = x1 + 1;
-                    int y1 = int(py) - (py < 0);
-                    int y2 = y1 + 1;
-
-                    int distx = int((px - x1) * 256);
-                    int disty = int((py - y1) * 256);
-                    int idistx = 256 - distx;
-                    int idisty = 256 - disty;
-
-                    x1 %= image_width;
-                    x2 %= image_width;
-                    y1 %= image_height;
-                    y2 %= image_height;
-
-                    if (x1 < 0) x1 += image_width;
-                    if (x2 < 0) x2 += image_width;
-                    if (y1 < 0) y1 += image_height;
-                    if (y2 < 0) y2 += image_height;
-
-                    Q_ASSERT(x1 >= 0 && x1 < image_width);
-                    Q_ASSERT(x2 >= 0 && x2 < image_width);
-                    Q_ASSERT(y1 >= 0 && y1 < image_height);
-                    Q_ASSERT(y2 >= 0 && y2 < image_height);
-
-                    int y1_offset = y1 * scanline_offset;
-                    int y2_offset = y2 * scanline_offset;
-
-#if defined(Q_IRIX_GCC3_3_WORKAROUND)
-                    uint tl = gccBug(image_bits[y1_offset + x1]);
-                    uint tr = gccBug(image_bits[y1_offset + x2]);
-                    uint bl = gccBug(image_bits[y2_offset + x1]);
-                    uint br = gccBug(image_bits[y2_offset + x2]);
-#else
-                    uint tl = image_bits[y1_offset + x1];
-                    uint tr = image_bits[y1_offset + x2];
-                    uint bl = image_bits[y2_offset + x1];
-                    uint br = image_bits[y2_offset + x2];
-#endif
-
-                    uint xtop = INTERPOLATE_PIXEL_256(tl, idistx, tr, distx);
-                    uint xbot = INTERPOLATE_PIXEL_256(bl, idistx, br, distx);
-                    *b = INTERPOLATE_PIXEL_256(xtop, idisty, xbot, disty);
-                    ++b;
-                    x += fdx;
-                    y += fdy;
-                    w += fdw;
-                }
-                if (spanMethod == RegularSpans)
-                    func(target, buffer, l, coverage);
-                else
-                    drawBufferSpan(data, buffer, buffer_size,
-                                   spans->x + spans->len - length,
-                                   spans->y, l, coverage);
-                target += l;
-                length -= l;
-            }
-            ++spans;
-        }
-    }
-}
-
-template <SpanMethod spanMethod>
 Q_STATIC_TEMPLATE_FUNCTION void blend_transformed_argb(int count, const QSpan *spans, void *userData)
 {
     QSpanData *data = reinterpret_cast<QSpanData *>(userData);
@@ -6738,7 +6586,7 @@ static const ProcessSpans processTextureSpans[NBlendTypes][QImage::NImageFormats
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // Indexed8
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // RGB32
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // ARGB32
-        SPANFUNC_POINTER(blend_transformed_bilinear_argb, RegularSpans), // ARGB32_Premultiplied
+        blend_transformed_bilinear_argb<RegularSpans, BlendTransformedBilinear>, // ARGB32_Premultiplied
         blend_transformed_bilinear_rgb565,
         blend_transformed_bilinear_argb8565,
         blend_transformed_bilinear_rgb666,
@@ -6757,7 +6605,7 @@ static const ProcessSpans processTextureSpans[NBlendTypes][QImage::NImageFormats
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // Indexed8
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // RGB32
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // ARGB32
-        SPANFUNC_POINTER(blend_transformed_bilinear_tiled_argb, RegularSpans), // ARGB32_Premultiplied
+        blend_transformed_bilinear_argb<RegularSpans, BlendTransformedBilinearTiled>, // ARGB32_Premultiplied
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // RGB16
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // ARGB8565_Premultiplied
         SPANFUNC_POINTER(blend_src_generic, RegularSpans), // RGB666
@@ -6856,7 +6704,7 @@ static const ProcessSpans processTextureSpansCallback[NBlendTypes][QImage::NImag
         blend_src_generic<CallbackSpans>,   // Indexed8
         blend_src_generic<CallbackSpans>,   // RGB32
         blend_src_generic<CallbackSpans>,   // ARGB32
-        blend_transformed_bilinear_argb<CallbackSpans>, // ARGB32_Premultiplied
+        blend_transformed_bilinear_argb<CallbackSpans, BlendTransformedBilinear>, // ARGB32_Premultiplied
         blend_src_generic<CallbackSpans>,   // RGB16
         blend_src_generic<CallbackSpans>,   // ARGB8565_Premultiplied
         blend_src_generic<CallbackSpans>,   // RGB666
@@ -6875,7 +6723,7 @@ static const ProcessSpans processTextureSpansCallback[NBlendTypes][QImage::NImag
         blend_src_generic<CallbackSpans>,   // Indexed8
         blend_src_generic<CallbackSpans>,   // RGB32
         blend_src_generic<CallbackSpans>,   // ARGB32
-        blend_transformed_bilinear_tiled_argb<CallbackSpans>, // ARGB32_Premultiplied
+        blend_transformed_bilinear_argb<CallbackSpans, BlendTransformedBilinearTiled>, // ARGB32_Premultiplied
         blend_src_generic<CallbackSpans>,   // RGB16
         blend_src_generic<CallbackSpans>,   // ARGB8565_Premultiplied
         blend_src_generic<CallbackSpans>,   // RGB666
@@ -7135,6 +6983,11 @@ void qt_build_pow_tables() {
     int winSmooth;
     if (SystemParametersInfo(0x200C /* SPI_GETFONTSMOOTHINGCONTRAST */, 0, &winSmooth, 0))
         smoothing = winSmooth / 1000.0;
+
+    // Safeguard ourselves against corrupt registry values...
+    if (smoothing > 5 || smoothing < 1)
+        smoothing = 1.4;
+
 #endif
 
 #ifdef Q_WS_X11
diff --git a/src/gui/painting/qpathclipper.cpp b/src/gui/painting/qpathclipper.cpp
index 949a820..00e74ba 100644
--- a/src/gui/painting/qpathclipper.cpp
+++ b/src/gui/painting/qpathclipper.cpp
@@ -935,10 +935,9 @@ qreal QWingedEdge::delta(int vertex, int a, int b) const
 
     qreal result = b_angle - a_angle;
 
-    if (qFuzzyIsNull(result) || qFuzzyCompare(result, 128))
-        return 0;
-
-    if (result < 0)
+    if (result >= 128.)
+        return result - 128.;
+    else if (result < 0)
         return result + 128.;
     else
         return result;