diff options
author | caryclark@google.com <caryclark@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-02-14 15:29:11 +0000 |
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committer | caryclark@google.com <caryclark@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-02-14 15:29:11 +0000 |
commit | 45a8fc6a8b00451f807783f2a6ec640e9bcc7256 (patch) | |
tree | bf483ee177b764a83768534293b9542a5a0c036e /experimental/Intersection/LogoPlay.cpp | |
parent | 3976825a21532e254311b90b4a9046e25717e335 (diff) |
shape ops work in progress
git-svn-id: http://skia.googlecode.com/svn/trunk@7738 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'experimental/Intersection/LogoPlay.cpp')
-rw-r--r-- | experimental/Intersection/LogoPlay.cpp | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/experimental/Intersection/LogoPlay.cpp b/experimental/Intersection/LogoPlay.cpp new file mode 100644 index 0000000000..3c9b75d86a --- /dev/null +++ b/experimental/Intersection/LogoPlay.cpp @@ -0,0 +1,354 @@ +#include <ctype.h> +#include "SkPath.h" +#include "SkParse.h" +#include "SkPoint.h" +#include "SkUtils.h" +#define QUADRATIC_APPROXIMATION 0 + +const char logoStr[] = + "<path fill=\"#0081C6\"" + "d=\"M440.51,289.479c1.623,1.342,5.01,4.164,5.01,9.531c0,5.223-2.965,7.697-5.93,10.024" + "c-0.918,0.916-1.977,1.907-1.977,3.462c0,1.551,1.059,2.397,1.834,3.035l2.545,1.973c3.105,2.613,5.928,5.016,5.928,9.889" + "c0,6.635-6.426,13.341-18.566,13.341c-10.238,0-15.178-4.87-15.178-10.097c0-2.543,1.268-6.139,5.438-8.613" + "c4.373-2.682,10.307-3.033,13.482-3.249c-0.99-1.271-2.119-2.61-2.119-4.798c0-1.199,0.355-1.907,0.707-2.754" + "c-0.779,0.07-1.553,0.141-2.26,0.141c-7.482,0-11.719-5.579-11.719-11.082c0-3.247,1.484-6.851,4.518-9.461" + "c4.025-3.318,8.824-3.883,12.639-3.883h14.541l-4.518,2.541H440.51z" + "M435.494,320.826c-0.562-0.072-0.916-0.072-1.619-0.072" + "c-0.637,0-4.451,0.143-7.416,1.132c-1.553,0.564-6.07,2.257-6.07,7.271c0,5.013,4.873,8.615,12.426,8.615" + "c6.775,0,10.379-3.253,10.379-7.624C443.193,326.54,440.863,324.64,435.494,320.826z" + "M437.543,307.412" + "c1.623-1.627,1.764-3.883,1.764-5.154c0-5.083-3.035-12.99-8.893-12.99c-1.838,0-3.812,0.918-4.945,2.331" + "c-1.199,1.483-1.551,3.387-1.551,5.225c0,4.729,2.754,12.565,8.826,12.565C434.508,309.389,436.41,308.543,437.543,307.412z\"/>" + "<path fill=\"#FFD200\"" + "d=\"M396.064,319.696c-11.206,0-17.198-8.739-17.198-16.636c0-9.233,7.542-17.126,18.258-17.126" + "c10.357,0,16.844,8.104,16.844,16.635C413.969,310.884,407.557,319.696,396.064,319.696z" + "M404.873,313.987" + "c1.695-2.257,2.119-5.074,2.119-7.826c0-6.202-2.961-18.042-11.701-18.042c-2.326,0-4.652,0.918-6.342,2.399" + "c-2.749,2.465-3.245,5.566-3.245,8.599c0,6.977,3.454,18.463,11.984,18.463C400.436,317.58,403.256,316.242,404.873,313.987z\"/>" + "<path fill=\"#ED174F\"" + "d=\"M357.861,319.696c-11.207,0-17.199-8.739-17.199-16.636c0-9.233,7.544-17.126,18.258-17.126" + "c10.359,0,16.845,8.104,16.845,16.635C375.764,310.884,369.351,319.696,357.861,319.696z" + "M366.671,313.987" + "c1.693-2.257,2.116-5.074,2.116-7.826c0-6.202-2.961-18.042-11.701-18.042c-2.325,0-4.652,0.918-6.344,2.399" + "c-2.749,2.465-3.241,5.566-3.241,8.599c0,6.977,3.452,18.463,11.983,18.463C362.234,317.58,365.053,316.242,366.671,313.987z\"/>" + "<path fill=\"#0081C6\"" + "d=\"M335.278,318.591l-10.135,2.339c-4.111,0.638-7.795,1.204-11.69,1.204" + "c-19.56,0-26.998-14.386-26.998-25.654c0-13.746,10.558-26.498,28.629-26.498c3.827,0,7.51,0.564,10.839,1.486" + "c5.316,1.488,7.796,3.331,9.355,4.394l-5.883,5.599l-2.479,0.565l1.771-2.837c-2.408-2.336-6.805-6.658-15.164-6.658" + "c-11.196,0-19.63,8.507-19.63,20.906c0,13.319,9.638,25.861,25.084,25.861c4.539,0,6.874-0.918,9-1.771v-11.407l-10.698,0.566" + "l5.667-3.047h15.023l-1.841,1.77c-0.5,0.424-0.567,0.57-0.71,1.133c-0.073,0.64-0.141,2.695-0.141,3.403V318.591z\"/>" + "<path fill=\"#49A942\"" + "d=\"M462.908,316.552c-2.342-0.214-2.832-0.638-2.832-3.401v-0.782v-39.327c0.014-0.153,0.025-0.31,0.041-0.457" + "c0.283-2.479,0.992-2.903,3.189-4.182h-10.135l-5.316,2.552h5.418v0.032l-0.004-0.024v41.406v2.341" + "c0,1.416-0.281,1.629-1.912,3.753H463.9l2.623-1.557C465.318,316.763,464.113,316.692,462.908,316.552z\"/>" + "<path fill=\"#ED174F\"" + "d=\"M491.742,317.203c-0.771,0.422-1.547,0.916-2.318,1.268c-2.326,1.055-4.719,1.336-6.83,1.336" + "c-2.25,0-5.77-0.143-9.361-2.744c-4.992-3.521-7.176-9.572-7.176-14.851c0-10.906,8.869-16.255,16.115-16.255" + "c2.533,0,5.141,0.633,7.252,1.972c3.516,2.318,4.43,5.344,4.922,6.963l-16.535,6.688l-5.422,0.422" + "c1.758,8.938,7.812,14.145,14.498,14.145c3.59,0,6.193-1.266,8.586-2.461L491.742,317.203z" + "M485.129,296.229" + "c1.336-0.493,2.039-0.914,2.039-1.899c0-2.812-3.166-6.053-6.967-6.053c-2.818,0-8.094,2.183-8.094,9.783" + "c0,1.197,0.141,2.464,0.213,3.73L485.129,296.229z\"/>" + "<path fill=\"#77787B\"" + "d=\"M498.535,286.439v4.643h-0.564v-4.643h-1.537v-0.482h3.637v0.482H498.535z\"/>" + "<path fill=\"#77787B\"" + "d=\"M504.863,291.082v-4.687h-0.023l-1.432,4.687h-0.439l-1.443-4.687h-0.02v4.687h-0.512v-5.125h0.877" + "l1.307,4.143h0.018l1.285-4.143h0.891v5.125H504.863z\"/>" +; + +size_t logoStrLen = sizeof(logoStr); + +#if QUADRATIC_APPROXIMATION +//////////////////////////////////////////////////////////////////////////////////// +//functions to approximate a cubic using two quadratics + +// midPt sets the first argument to be the midpoint of the other two +// it is used by quadApprox +static inline void midPt(SkPoint& dest,const SkPoint& a,const SkPoint& b) +{ + dest.set(SkScalarAve(a.fX, b.fX),SkScalarAve(a.fY, b.fY)); +} +// quadApprox - makes an approximation, which we hope is faster +static void quadApprox(SkPath &fPath, const SkPoint &p0, const SkPoint &p1, const SkPoint &p2) +{ + //divide the cubic up into two cubics, then convert them into quadratics + //define our points + SkPoint c,j,k,l,m,n,o,p,q, mid; + fPath.getLastPt(&c); + midPt(j, p0, c); + midPt(k, p0, p1); + midPt(l, p1, p2); + midPt(o, j, k); + midPt(p, k, l); + midPt(q, o, p); + //compute the first half + m.set(SkScalarHalf(3*j.fX - c.fX), SkScalarHalf(3*j.fY - c.fY)); + n.set(SkScalarHalf(3*o.fX -q.fX), SkScalarHalf(3*o.fY - q.fY)); + midPt(mid,m,n); + fPath.quadTo(mid,q); + c = q; + //compute the second half + m.set(SkScalarHalf(3*p.fX - c.fX), SkScalarHalf(3*p.fY - c.fY)); + n.set(SkScalarHalf(3*l.fX -p2.fX),SkScalarHalf(3*l.fY -p2.fY)); + midPt(mid,m,n); + fPath.quadTo(mid,p2); +} +#endif + + +static inline bool is_between(int c, int min, int max) +{ + return (unsigned)(c - min) <= (unsigned)(max - min); +} + +static inline bool is_ws(int c) +{ + return is_between(c, 1, 32); +} + +static inline bool is_digit(int c) +{ + return is_between(c, '0', '9'); +} + +static inline bool is_sep(int c) +{ + return is_ws(c) || c == ','; +} + +static const char* skip_ws(const char str[]) +{ + SkASSERT(str); + while (is_ws(*str)) + str++; + return str; +} + +static const char* skip_sep(const char str[]) +{ + SkASSERT(str); + while (is_sep(*str)) + str++; + return str; +} + +static const char* find_points(const char str[], SkPoint value[], int count, + bool isRelative, SkPoint* relative) +{ + str = SkParse::FindScalars(str, &value[0].fX, count * 2); + if (isRelative) { + for (int index = 0; index < count; index++) { + value[index].fX += relative->fX; + value[index].fY += relative->fY; + } + } + return str; +} + +static const char* find_scalar(const char str[], SkScalar* value, + bool isRelative, SkScalar relative) +{ + str = SkParse::FindScalar(str, value); + if (isRelative) + *value += relative; + return str; +} + +static void showPathContour(SkPath::Iter& iter) { + uint8_t verb; + SkPoint pts[4]; + while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { + switch (verb) { + case SkPath::kMove_Verb: + SkDebugf("path.moveTo(%1.9gf,%1.9gf);\n", pts[0].fX, pts[0].fY); + continue; + case SkPath::kLine_Verb: + SkDebugf("path.lineTo(%1.9gf,%1.9gf);\n", pts[1].fX, pts[1].fY); + break; + case SkPath::kQuad_Verb: + SkDebugf("path.quadTo(%1.9gf,%1.9gf, %1.9gf,%1.9gf);\n", + pts[1].fX, pts[1].fY, pts[2].fX, pts[2].fY); + break; + case SkPath::kCubic_Verb: + SkDebugf("path.cubicTo(%1.9gf,%1.9gf, %1.9gf,%1.9gf, %1.9gf,%1.9gf);\n", + pts[1].fX, pts[1].fY, pts[2].fX, pts[2].fY, pts[3].fX, pts[3].fY); + break; + case SkPath::kClose_Verb: + SkDebugf("path.close();\n"); + break; + default: + SkDEBUGFAIL("bad verb"); + return; + } + } +} + +static void showPath(const SkPath& path) { + SkPath::Iter iter(path, true); + int rectCount = path.isRectContours() ? path.rectContours(NULL, NULL) : 0; + if (rectCount > 0) { + SkTDArray<SkRect> rects; + SkTDArray<SkPath::Direction> directions; + rects.setCount(rectCount); + directions.setCount(rectCount); + path.rectContours(rects.begin(), directions.begin()); + for (int contour = 0; contour < rectCount; ++contour) { + const SkRect& rect = rects[contour]; + SkDebugf("path.addRect(%1.9g, %1.9g, %1.9g, %1.9g, %s);\n", rect.fLeft, rect.fTop, + rect.fRight, rect.fBottom, directions[contour] == SkPath::kCCW_Direction + ? "SkPath::kCCW_Direction" : "SkPath::kCW_Direction"); + } + return; + } + iter.setPath(path, true); + showPathContour(iter); +} + +static const char* parsePath(const char* data) { + SkPath fPath; + SkPoint f = {0, 0}; + SkPoint c = {0, 0}; + SkPoint lastc = {0, 0}; + SkPoint points[3]; + char op = '\0'; + char previousOp = '\0'; + bool relative = false; + do { + data = skip_ws(data); + if (data[0] == '\0') + break; + char ch = data[0]; + if (is_digit(ch) || ch == '-' || ch == '+') { + if (op == '\0') { + SkASSERT(0); + return 0; + } + } + else { + op = ch; + relative = false; + if (islower(op)) { + op = (char) toupper(op); + relative = true; + } + data++; + data = skip_sep(data); + } + switch (op) { + case 'M': + data = find_points(data, points, 1, relative, &c); + fPath.moveTo(points[0]); + op = 'L'; + c = points[0]; + break; + case 'L': + data = find_points(data, points, 1, relative, &c); + fPath.lineTo(points[0]); + c = points[0]; + break; + case 'H': { + SkScalar x; + data = find_scalar(data, &x, relative, c.fX); + fPath.lineTo(x, c.fY); + c.fX = x; + } + break; + case 'V': { + SkScalar y; + data = find_scalar(data, &y, relative, c.fY); + fPath.lineTo(c.fX, y); + c.fY = y; + } + break; + case 'C': + data = find_points(data, points, 3, relative, &c); + goto cubicCommon; + case 'S': + data = find_points(data, &points[1], 2, relative, &c); + points[0] = c; + if (previousOp == 'C' || previousOp == 'S') { + points[0].fX -= lastc.fX - c.fX; + points[0].fY -= lastc.fY - c.fY; + } + cubicCommon: + // if (data[0] == '\0') + // return; +#if QUADRATIC_APPROXIMATION + quadApprox(fPath, points[0], points[1], points[2]); +#else //this way just does a boring, slow old cubic + fPath.cubicTo(points[0], points[1], points[2]); +#endif + //if we are using the quadApprox, lastc is what it would have been if we had used + //cubicTo + lastc = points[1]; + c = points[2]; + break; + case 'Q': // Quadratic Bezier Curve + data = find_points(data, points, 2, relative, &c); + goto quadraticCommon; + case 'T': + data = find_points(data, &points[1], 1, relative, &c); + points[0] = points[1]; + if (previousOp == 'Q' || previousOp == 'T') { + points[0].fX = c.fX * 2 - lastc.fX; + points[0].fY = c.fY * 2 - lastc.fY; + } + quadraticCommon: + fPath.quadTo(points[0], points[1]); + lastc = points[0]; + c = points[1]; + break; + case 'Z': + fPath.close(); +#if 0 // !!! still a bug? + if (fPath.isEmpty() && (f.fX != 0 || f.fY != 0)) { + c.fX -= SkScalar.Epsilon; // !!! enough? + fPath.moveTo(c); + fPath.lineTo(f); + fPath.close(); + } +#endif + c = f; + op = '\0'; + break; + case '~': { + SkPoint args[2]; + data = find_points(data, args, 2, false, NULL); + fPath.moveTo(args[0].fX, args[0].fY); + fPath.lineTo(args[1].fX, args[1].fY); + } + break; + default: + SkASSERT(0); + return 0; + } + if (previousOp == 0) + f = c; + previousOp = op; + } while (data[0] != '"'); + showPath(fPath); + return data; +} + +const char pathPrefix[] = "<path fill=\""; + +void parseSVG(); +void parseSVG() { + const char* data = logoStr; + const char* dataEnd = logoStr + logoStrLen - 1; + while (data < dataEnd) { + SkASSERT(strncmp(data, pathPrefix, sizeof(pathPrefix) - 1) == 0); + data += sizeof(pathPrefix) - 1; + SkDebugf("paint.setColor(0xFF%c%c%c%c%c%c);\n", data[1], data[2], data[3], data[4], + data[5], data[6]); + data += 8; + SkASSERT(strncmp(data, "d=\"", 3) == 0); + data += 3; + SkDebugf("path.reset();\n"); + data = parsePath(data); + SkDebugf("canvas->drawPath(path, paint);\n"); + SkASSERT(strncmp(data, "\"/>", 3) == 0); + data += 3; + } +} + |