diff options
Diffstat (limited to 'src/gui/painting/qblendfunctions.cpp')
| -rw-r--r-- | src/gui/painting/qblendfunctions.cpp | 446 |
1 files changed, 25 insertions, 421 deletions
diff --git a/src/gui/painting/qblendfunctions.cpp b/src/gui/painting/qblendfunctions.cpp index dc33896..24908ce 100644 --- a/src/gui/painting/qblendfunctions.cpp +++ b/src/gui/painting/qblendfunctions.cpp @@ -40,7 +40,7 @@ ****************************************************************************/ #include <qmath.h> -#include "qdrawhelper_p.h" +#include "qblendfunctions_p.h" QT_BEGIN_NAMESPACE @@ -88,6 +88,8 @@ static inline quint16 convert_argb32_to_rgb16(quint32 spix) struct Blend_RGB16_on_RGB16_NoAlpha { inline void write(quint16 *dst, quint16 src) { *dst = src; } + + inline void flush(void *) {} }; struct Blend_RGB16_on_RGB16_ConstAlpha { @@ -100,6 +102,8 @@ struct Blend_RGB16_on_RGB16_ConstAlpha { *dst = BYTE_MUL_RGB16(src, m_alpha) + BYTE_MUL_RGB16(*dst, m_ialpha); } + inline void flush(void *) {} + quint32 m_alpha; quint32 m_ialpha; }; @@ -114,6 +118,8 @@ struct Blend_ARGB24_on_RGB16_SourceAlpha { *dst = s; } } + + inline void flush(void *) {} }; struct Blend_ARGB24_on_RGB16_SourceAndConstAlpha { @@ -132,6 +138,8 @@ struct Blend_ARGB24_on_RGB16_SourceAndConstAlpha { } } + inline void flush(void *) {} + quint32 m_alpha; }; @@ -145,6 +153,8 @@ struct Blend_ARGB32_on_RGB16_SourceAlpha { *dst = s; } } + + inline void flush(void *) {} }; struct Blend_ARGB32_on_RGB16_SourceAndConstAlpha { @@ -163,99 +173,11 @@ struct Blend_ARGB32_on_RGB16_SourceAndConstAlpha { } } + inline void flush(void *) {} + quint32 m_alpha; }; -template <typename SRC, typename T> -void qt_scale_image_16bit(uchar *destPixels, int dbpl, - const uchar *srcPixels, int sbpl, - const QRectF &targetRect, - const QRectF &srcRect, - const QRect &clip, - T blender) -{ - qreal sx = targetRect.width() / (qreal) srcRect.width(); - qreal sy = targetRect.height() / (qreal) srcRect.height(); - - int ix = 0x00010000 / sx; - int iy = 0x00010000 / sy; - -// qDebug() << "scale:" << endl -// << " - target" << targetRect << endl -// << " - source" << srcRect << endl -// << " - clip" << clip << endl -// << " - sx=" << sx << " sy=" << sy << " ix=" << ix << " iy=" << iy; - - int cx1 = clip.x(); - int cx2 = clip.x() + clip.width(); - int cy1 = clip.top(); - int cy2 = clip.y() + clip.height(); - - int tx1 = qRound(targetRect.left()); - int tx2 = qRound(targetRect.right()); - int ty1 = qRound(targetRect.top()); - int ty2 = qRound(targetRect.bottom()); - - if (tx2 < tx1) - qSwap(tx2, tx1); - - if (ty2 < ty1) - qSwap(ty2, ty1); - - if (tx1 < cx1) - tx1 = cx1; - - if (tx2 >= cx2) - tx2 = cx2; - - if (tx1 >= tx2) - return; - - if (ty1 < cy1) - ty1 = cy1; - - if (ty2 >= cy2) - ty2 = cy2; - - if (ty1 >= ty2) - return; - - int h = ty2 - ty1; - int w = tx2 - tx1; - - - quint32 basex; - quint32 srcy; - - if (sx < 0) { - int dstx = qFloor((tx1 + qreal(0.5) - targetRect.right()) * ix) + 1; - basex = quint32(srcRect.right() * 65536) + dstx; - } else { - int dstx = qCeil((tx1 + qreal(0.5) - targetRect.left()) * ix) - 1; - basex = quint32(srcRect.left() * 65536) + dstx; - } - if (sy < 0) { - int dsty = qFloor((ty1 + qreal(0.5) - targetRect.bottom()) * iy) + 1; - srcy = quint32(srcRect.bottom() * 65536) + dsty; - } else { - int dsty = qCeil((ty1 + qreal(0.5) - targetRect.top()) * iy) - 1; - srcy = quint32(srcRect.top() * 65536) + dsty; - } - - quint16 *dst = ((quint16 *) (destPixels + ty1 * dbpl)) + tx1; - - while (h--) { - const SRC *src = (const SRC *) (srcPixels + (srcy >> 16) * sbpl); - int srcx = basex; - for (int x=0; x<w; ++x) { - blender.write(&dst[x], src[srcx >> 16]); - srcx += ix; - } - dst = (quint16 *)(((uchar *) dst) + dbpl); - srcy += iy; - } -} - void qt_scale_image_rgb16_on_rgb16(uchar *destPixels, int dbpl, const uchar *srcPixels, int sbpl, const QRectF &targetRect, @@ -447,10 +369,10 @@ static void qt_blend_argb24_on_rgb16(uchar *destPixels, int dbpl, -static void qt_blend_argb32_on_rgb16_const_alpha(uchar *destPixels, int dbpl, - const uchar *srcPixels, int sbpl, - int w, int h, - int const_alpha) +void qt_blend_argb32_on_rgb16_const_alpha(uchar *destPixels, int dbpl, + const uchar *srcPixels, int sbpl, + int w, int h, + int const_alpha) { quint16 *dst = (quint16 *) destPixels; const quint32 *src = (const quint32 *) srcPixels; @@ -643,6 +565,8 @@ void qt_blend_rgb32_on_rgb32(uchar *destPixels, int dbpl, struct Blend_RGB32_on_RGB32_NoAlpha { inline void write(quint32 *dst, quint32 src) { *dst = src; } + + inline void flush(void *) {} }; struct Blend_RGB32_on_RGB32_ConstAlpha { @@ -655,6 +579,8 @@ struct Blend_RGB32_on_RGB32_ConstAlpha { *dst = BYTE_MUL(src, m_alpha) + BYTE_MUL(*dst, m_ialpha); } + inline void flush(void *) {} + quint32 m_alpha; quint32 m_ialpha; }; @@ -663,6 +589,8 @@ struct Blend_ARGB32_on_ARGB32_SourceAlpha { inline void write(quint32 *dst, quint32 src) { *dst = src + BYTE_MUL(*dst, qAlpha(~src)); } + + inline void flush(void *) {} }; struct Blend_ARGB32_on_ARGB32_SourceAndConstAlpha { @@ -676,98 +604,12 @@ struct Blend_ARGB32_on_ARGB32_SourceAndConstAlpha { *dst = src + BYTE_MUL(*dst, qAlpha(~src)); } + inline void flush(void *) {} + quint32 m_alpha; quint32 m_ialpha; }; -template <typename T> void qt_scale_image_32bit(uchar *destPixels, int dbpl, - const uchar *srcPixels, int sbpl, - const QRectF &targetRect, - const QRectF &srcRect, - const QRect &clip, - T blender) -{ - qreal sx = targetRect.width() / (qreal) srcRect.width(); - qreal sy = targetRect.height() / (qreal) srcRect.height(); - - int ix = 0x00010000 / sx; - int iy = 0x00010000 / sy; - -// qDebug() << "scale:" << endl -// << " - target" << targetRect << endl -// << " - source" << srcRect << endl -// << " - clip" << clip << endl -// << " - sx=" << sx << " sy=" << sy << " ix=" << ix << " iy=" << iy; - - int cx1 = clip.x(); - int cx2 = clip.x() + clip.width(); - int cy1 = clip.top(); - int cy2 = clip.y() + clip.height(); - - int tx1 = qRound(targetRect.left()); - int tx2 = qRound(targetRect.right()); - int ty1 = qRound(targetRect.top()); - int ty2 = qRound(targetRect.bottom()); - - if (tx2 < tx1) - qSwap(tx2, tx1); - - if (ty2 < ty1) - qSwap(ty2, ty1); - - if (tx1 < cx1) - tx1 = cx1; - - if (tx2 >= cx2) - tx2 = cx2; - - if (tx1 >= tx2) - return; - - if (ty1 < cy1) - ty1 = cy1; - - if (ty2 >= cy2) - ty2 = cy2; - - if (ty1 >= ty2) - return; - - int h = ty2 - ty1; - int w = tx2 - tx1; - - quint32 basex; - quint32 srcy; - - if (sx < 0) { - int dstx = qFloor((tx1 + qreal(0.5) - targetRect.right()) * ix) + 1; - basex = quint32(srcRect.right() * 65536) + dstx; - } else { - int dstx = qCeil((tx1 + qreal(0.5) - targetRect.left()) * ix) - 1; - basex = quint32(srcRect.left() * 65536) + dstx; - } - if (sy < 0) { - int dsty = qFloor((ty1 + qreal(0.5) - targetRect.bottom()) * iy) + 1; - srcy = quint32(srcRect.bottom() * 65536) + dsty; - } else { - int dsty = qCeil((ty1 + qreal(0.5) - targetRect.top()) * iy) - 1; - srcy = quint32(srcRect.top() * 65536) + dsty; - } - - quint32 *dst = ((quint32 *) (destPixels + ty1 * dbpl)) + tx1; - - while (h--) { - const uint *src = (const quint32 *) (srcPixels + (srcy >> 16) * sbpl); - int srcx = basex; - for (int x=0; x<w; ++x) { - blender.write(&dst[x], src[srcx >> 16]); - srcx += ix; - } - dst = (quint32 *)(((uchar *) dst) + dbpl); - srcy += iy; - } -} - void qt_scale_image_rgb32_on_rgb32(uchar *destPixels, int dbpl, const uchar *srcPixels, int sbpl, const QRectF &targetRect, @@ -818,244 +660,6 @@ void qt_scale_image_argb32_on_argb32(uchar *destPixels, int dbpl, } } -struct QTransformImageVertex -{ - qreal x, y, u, v; // destination coordinates (x, y) and source coordinates (u, v) -}; - -template <class SrcT, class DestT, class Blender> -void qt_transform_image_rasterize(DestT *destPixels, int dbpl, - const SrcT *srcPixels, int sbpl, - const QTransformImageVertex &topLeft, const QTransformImageVertex &bottomLeft, - const QTransformImageVertex &topRight, const QTransformImageVertex &bottomRight, - const QRect &sourceRect, - const QRect &clip, - qreal topY, qreal bottomY, - int dudx, int dvdx, int dudy, int dvdy, int u0, int v0, - Blender blender) -{ - int fromY = qMax(qRound(topY), clip.top()); - int toY = qMin(qRound(bottomY), clip.top() + clip.height()); - if (fromY >= toY) - return; - - qreal leftSlope = (bottomLeft.x - topLeft.x) / (bottomLeft.y - topLeft.y); - qreal rightSlope = (bottomRight.x - topRight.x) / (bottomRight.y - topRight.y); - int dx_l = int(leftSlope * 0x10000); - int dx_r = int(rightSlope * 0x10000); - int x_l = int((topLeft.x + (0.5 + fromY - topLeft.y) * leftSlope + 0.5) * 0x10000); - int x_r = int((topRight.x + (0.5 + fromY - topRight.y) * rightSlope + 0.5) * 0x10000); - - int fromX, toX, x1, x2, u, v, i, ii; - DestT *line; - for (int y = fromY; y < toY; ++y) { - line = reinterpret_cast<DestT *>(reinterpret_cast<uchar *>(destPixels) + y * dbpl); - - fromX = qMax(x_l >> 16, clip.left()); - toX = qMin(x_r >> 16, clip.left() + clip.width()); - if (fromX < toX) { - // Because of rounding, we can get source coordinates outside the source image. - // Clamp these coordinates to the source rect to avoid segmentation fault and - // garbage on the screen. - - // Find the first pixel on the current scan line where the source coordinates are within the source rect. - x1 = fromX; - u = x1 * dudx + y * dudy + u0; - v = x1 * dvdx + y * dvdy + v0; - for (; x1 < toX; ++x1) { - int uu = u >> 16; - int vv = v >> 16; - if (uu >= sourceRect.left() && uu < sourceRect.left() + sourceRect.width() - && vv >= sourceRect.top() && vv < sourceRect.top() + sourceRect.height()) { - break; - } - u += dudx; - v += dvdx; - } - - // Find the last pixel on the current scan line where the source coordinates are within the source rect. - x2 = toX; - u = (x2 - 1) * dudx + y * dudy + u0; - v = (x2 - 1) * dvdx + y * dvdy + v0; - for (; x2 > x1; --x2) { - int uu = u >> 16; - int vv = v >> 16; - if (uu >= sourceRect.left() && uu < sourceRect.left() + sourceRect.width() - && vv >= sourceRect.top() && vv < sourceRect.top() + sourceRect.height()) { - break; - } - u -= dudx; - v -= dvdx; - } - - // Set up values at the beginning of the scan line. - u = fromX * dudx + y * dudy + u0; - v = fromX * dvdx + y * dvdy + v0; - line += fromX; - - // Beginning of the scan line, with per-pixel checks. - i = x1 - fromX; - while (i) { - int uu = qBound(sourceRect.left(), u >> 16, sourceRect.left() + sourceRect.width() - 1); - int vv = qBound(sourceRect.top(), v >> 16, sourceRect.top() + sourceRect.height() - 1); - blender.write(line, reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + vv * sbpl)[uu]); - u += dudx; - v += dvdx; - ++line; - --i; - } - - // Middle of the scan line, without checks. - // Manual loop unrolling. - i = x2 - x1; - ii = i >> 3; - while (ii) { - blender.write(&line[0], reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; - blender.write(&line[1], reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; - blender.write(&line[2], reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; - blender.write(&line[3], reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; - blender.write(&line[4], reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; - blender.write(&line[5], reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; - blender.write(&line[6], reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; - blender.write(&line[7], reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; - line += 8; - --ii; - } - switch (i & 7) { - case 7: blender.write(line, reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; ++line; - case 6: blender.write(line, reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; ++line; - case 5: blender.write(line, reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; ++line; - case 4: blender.write(line, reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; ++line; - case 3: blender.write(line, reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; ++line; - case 2: blender.write(line, reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; ++line; - case 1: blender.write(line, reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + (v >> 16) * sbpl)[u >> 16]); u += dudx; v += dvdx; ++line; - } - - // End of the scan line, with per-pixel checks. - i = toX - x2; - while (i) { - int uu = qBound(sourceRect.left(), u >> 16, sourceRect.left() + sourceRect.width() - 1); - int vv = qBound(sourceRect.top(), v >> 16, sourceRect.top() + sourceRect.height() - 1); - blender.write(line, reinterpret_cast<const SrcT *>(reinterpret_cast<const uchar *>(srcPixels) + vv * sbpl)[uu]); - u += dudx; - v += dvdx; - ++line; - --i; - } - } - x_l += dx_l; - x_r += dx_r; - } -} - -template <class SrcT, class DestT, class Blender> -void qt_transform_image(DestT *destPixels, int dbpl, - const SrcT *srcPixels, int sbpl, - const QRectF &targetRect, - const QRectF &sourceRect, - const QRect &clip, - const QTransform &targetRectTransform, - Blender blender) -{ - enum Corner - { - TopLeft, - TopRight, - BottomRight, - BottomLeft - }; - - // map source rectangle to destination. - QTransformImageVertex v[4]; - v[TopLeft].u = v[BottomLeft].u = sourceRect.left(); - v[TopLeft].v = v[TopRight].v = sourceRect.top(); - v[TopRight].u = v[BottomRight].u = sourceRect.right(); - v[BottomLeft].v = v[BottomRight].v = sourceRect.bottom(); - targetRectTransform.map(targetRect.left(), targetRect.top(), &v[TopLeft].x, &v[TopLeft].y); - targetRectTransform.map(targetRect.right(), targetRect.top(), &v[TopRight].x, &v[TopRight].y); - targetRectTransform.map(targetRect.left(), targetRect.bottom(), &v[BottomLeft].x, &v[BottomLeft].y); - targetRectTransform.map(targetRect.right(), targetRect.bottom(), &v[BottomRight].x, &v[BottomRight].y); - - // find topmost vertex. - int topmost = 0; - for (int i = 1; i < 4; ++i) { - if (v[i].y < v[topmost].y) - topmost = i; - } - // rearrange array such that topmost vertex is at index 0. - switch (topmost) { - case 1: - { - QTransformImageVertex t = v[0]; - for (int i = 0; i < 3; ++i) - v[i] = v[i+1]; - v[3] = t; - } - break; - case 2: - qSwap(v[0], v[2]); - qSwap(v[1], v[3]); - break; - case 3: - { - QTransformImageVertex t = v[3]; - for (int i = 3; i > 0; --i) - v[i] = v[i-1]; - v[0] = t; - } - break; - } - - // if necessary, swap vertex 1 and 3 such that 1 is to the left of 3. - qreal dx1 = v[1].x - v[0].x; - qreal dy1 = v[1].y - v[0].y; - qreal dx2 = v[3].x - v[0].x; - qreal dy2 = v[3].y - v[0].y; - if (dx1 * dy2 - dx2 * dy1 > 0) - qSwap(v[1], v[3]); - - QTransformImageVertex u = {v[1].x - v[0].x, v[1].y - v[0].y, v[1].u - v[0].u, v[1].v - v[0].v}; - QTransformImageVertex w = {v[2].x - v[0].x, v[2].y - v[0].y, v[2].u - v[0].u, v[2].v - v[0].v}; - - qreal det = u.x * w.y - u.y * w.x; - if (det == 0) - return; - - qreal invDet = 1.0 / det; - qreal m11, m12, m21, m22, mdx, mdy; - - m11 = (u.u * w.y - u.y * w.u) * invDet; - m12 = (u.x * w.u - u.u * w.x) * invDet; - m21 = (u.v * w.y - u.y * w.v) * invDet; - m22 = (u.x * w.v - u.v * w.x) * invDet; - mdx = v[0].u - m11 * v[0].x - m12 * v[0].y; - mdy = v[0].v - m21 * v[0].x - m22 * v[0].y; - - int dudx = int(m11 * 0x10000); - int dvdx = int(m21 * 0x10000); - int dudy = int(m12 * 0x10000); - int dvdy = int(m22 * 0x10000); - int u0 = qCeil((0.5 * m11 + 0.5 * m12 + mdx) * 0x10000) - 1; - int v0 = qCeil((0.5 * m21 + 0.5 * m22 + mdy) * 0x10000) - 1; - - int x1 = qFloor(sourceRect.left()); - int y1 = qFloor(sourceRect.top()); - int x2 = qCeil(sourceRect.right()); - int y2 = qCeil(sourceRect.bottom()); - QRect sourceRectI(x1, y1, x2 - x1, y2 - y1); - - // rasterize trapezoids. - if (v[1].y < v[3].y) { - qt_transform_image_rasterize(destPixels, dbpl, srcPixels, sbpl, v[0], v[1], v[0], v[3], sourceRectI, clip, v[0].y, v[1].y, dudx, dvdx, dudy, dvdy, u0, v0, blender); - qt_transform_image_rasterize(destPixels, dbpl, srcPixels, sbpl, v[1], v[2], v[0], v[3], sourceRectI, clip, v[1].y, v[3].y, dudx, dvdx, dudy, dvdy, u0, v0, blender); - qt_transform_image_rasterize(destPixels, dbpl, srcPixels, sbpl, v[1], v[2], v[3], v[2], sourceRectI, clip, v[3].y, v[2].y, dudx, dvdx, dudy, dvdy, u0, v0, blender); - } else { - qt_transform_image_rasterize(destPixels, dbpl, srcPixels, sbpl, v[0], v[1], v[0], v[3], sourceRectI, clip, v[0].y, v[3].y, dudx, dvdx, dudy, dvdy, u0, v0, blender); - qt_transform_image_rasterize(destPixels, dbpl, srcPixels, sbpl, v[0], v[1], v[3], v[2], sourceRectI, clip, v[3].y, v[1].y, dudx, dvdx, dudy, dvdy, u0, v0, blender); - qt_transform_image_rasterize(destPixels, dbpl, srcPixels, sbpl, v[1], v[2], v[3], v[2], sourceRectI, clip, v[1].y, v[2].y, dudx, dvdx, dudy, dvdy, u0, v0, blender); - } -} - void qt_transform_image_rgb16_on_rgb16(uchar *destPixels, int dbpl, const uchar *srcPixels, int sbpl, const QRectF &targetRect, |