diff options
Diffstat (limited to 'samplecode/SampleRegion.cpp')
| -rw-r--r-- | samplecode/SampleRegion.cpp | 168 |
1 files changed, 149 insertions, 19 deletions
diff --git a/samplecode/SampleRegion.cpp b/samplecode/SampleRegion.cpp index 48153effa7..a46b488bf8 100644 --- a/samplecode/SampleRegion.cpp +++ b/samplecode/SampleRegion.cpp @@ -15,6 +15,105 @@ #include "SkUtils.h" #include "SkImageDecoder.h" +static void test_strokerect(SkCanvas* canvas) { + int width = 100; + int height = 100; + + SkBitmap bitmap; + bitmap.setConfig(SkBitmap::kA8_Config, width*2, height*2); + bitmap.allocPixels(); + bitmap.eraseColor(0); + + SkScalar dx = 20; + SkScalar dy = 20; + + SkPath path; + path.addRect(0.0f, 0.0f, width, height, SkPath::kCW_Direction); + SkRect r = SkRect::MakeWH(width, height); + + SkCanvas c(bitmap); + c.translate(dx, dy); + + SkPaint paint; + paint.setStyle(SkPaint::kStroke_Style); + paint.setStrokeWidth(1); + + // use the rect + c.clear(0); + c.drawRect(r, paint); + canvas->drawBitmap(bitmap, 0, 0, NULL); + + // use the path + c.clear(0); + c.drawPath(path, paint); + canvas->drawBitmap(bitmap, 2*width, 0, NULL); +} + +static void drawFadingText(SkCanvas* canvas, + const char* text, size_t len, SkScalar x, SkScalar y, + const SkPaint& paint) { + // Need a bounds for the text + SkRect bounds; + SkPaint::FontMetrics fm; + + paint.getFontMetrics(&fm); + bounds.set(x, y + fm.fTop, x + paint.measureText(text, len), y + fm.fBottom); + + // may need to outset bounds a little, to account for hinting and/or + // antialiasing + bounds.inset(-SkIntToScalar(2), -SkIntToScalar(2)); + + canvas->saveLayer(&bounds, NULL); + canvas->drawText(text, len, x, y, paint); + + const SkPoint pts[] = { + { bounds.fLeft, y }, + { bounds.fRight, y } + }; + const SkColor colors[] = { SK_ColorBLACK, SK_ColorBLACK, 0 }; + + // pos[1] value is where we start to fade, relative to the width + // of our pts[] array. + const SkScalar pos[] = { 0, SkFloatToScalar(0.9), SK_Scalar1 }; + + SkShader* s = SkGradientShader::CreateLinear(pts, colors, pos, 3, + SkShader::kClamp_TileMode); + SkPaint p; + p.setShader(s)->unref(); + p.setXfermodeMode(SkXfermode::kDstIn_Mode); + canvas->drawRect(bounds, p); + + canvas->restore(); +} + +static void test_text(SkCanvas* canvas) { + SkPaint paint; + paint.setAntiAlias(true); + paint.setTextSize(20); + + const char* str = "Hamburgefons"; + size_t len = strlen(str); + SkScalar x = 20; + SkScalar y = 20; + + canvas->drawText(str, len, x, y, paint); + + y += 20; + + const SkPoint pts[] = { { x, y }, { x + paint.measureText(str, len), y } }; + const SkColor colors[] = { SK_ColorBLACK, SK_ColorBLACK, 0 }; + const SkScalar pos[] = { 0, 0.9f, 1 }; + SkShader* s = SkGradientShader::CreateLinear(pts, colors, pos, + SK_ARRAY_COUNT(colors), + SkShader::kClamp_TileMode); + paint.setShader(s)->unref(); + canvas->drawText(str, len, x, y, paint); + + y += 20; + paint.setShader(NULL); + drawFadingText(canvas, str, len, x, y, paint); +} + #ifdef SK_BUILD_FOR_WIN // windows doesn't have roundf inline float roundf(float x) { return (x-floor(x))>0.5 ? ceil(x) : floor(x); } @@ -32,26 +131,27 @@ static void make_rgn(SkRegion* rgn, int left, int top, int right, int bottom, static void test_union_bug_1505668(SkRegion* ra, SkRegion* rb, SkRegion* rc) { static int32_t dataA[] = { - 0x00000001, 0x000001dd, - 0x00000001, 0x0000000c, 0x0000000d, 0x00000025, - 0x7fffffff, 0x000001de, 0x00000001, 0x00000025, - 0x7fffffff, 0x000004b3, 0x00000001, 0x00000026, - 0x7fffffff, 0x000004b4, 0x0000000c, 0x00000026, - 0x7fffffff, 0x00000579, 0x00000000, 0x0000013a, - 0x7fffffff, 0x000005d8, 0x00000000, 0x0000013b, - 0x7fffffff, 0x7fffffff + 0x00000001, + 0x000001dd, 2, 0x00000001, 0x0000000c, 0x0000000d, 0x00000025, 0x7fffffff, + 0x000001de, 1, 0x00000001, 0x00000025, 0x7fffffff, + 0x000004b3, 1, 0x00000001, 0x00000026, 0x7fffffff, + 0x000004b4, 1, 0x0000000c, 0x00000026, 0x7fffffff, + 0x00000579, 1, 0x00000000, 0x0000013a, 0x7fffffff, + 0x000005d8, 1, 0x00000000, 0x0000013b, 0x7fffffff, + 0x7fffffff }; make_rgn(ra, 0, 1, 315, 1496, SK_ARRAY_COUNT(dataA), dataA); static int32_t dataB[] = { - 0x000000b6, 0x000000c4, - 0x000000a1, 0x000000f0, 0x7fffffff, 0x000000d6, - 0x7fffffff, 0x000000e4, 0x00000070, 0x00000079, - 0x000000a1, 0x000000b0, 0x7fffffff, 0x000000e6, - 0x7fffffff, 0x000000f4, 0x00000070, 0x00000079, - 0x000000a1, 0x000000b0, 0x7fffffff, 0x000000f6, - 0x7fffffff, 0x00000104, 0x000000a1, 0x000000b0, - 0x7fffffff, 0x7fffffff + 0x000000b6, + 0x000000c4, 1, 0x000000a1, 0x000000f0, 0x7fffffff, + 0x000000d6, 0, 0x7fffffff, + 0x000000e4, 2, 0x00000070, 0x00000079, 0x000000a1, 0x000000b0, 0x7fffffff, + 0x000000e6, 0, 0x7fffffff, + 0x000000f4, 2, 0x00000070, 0x00000079, 0x000000a1, 0x000000b0, 0x7fffffff, + 0x000000f6, 0, 0x7fffffff, + 0x00000104, 1, 0x000000a1, 0x000000b0, 0x7fffffff, + 0x7fffffff }; make_rgn(rb, 112, 182, 240, 260, SK_ARRAY_COUNT(dataB), dataB); @@ -103,11 +203,15 @@ public: this->setBGColor(0xFFDDDDDD); } - void build_rgn(SkRegion* rgn, SkRegion::Op op) { + void build_base_rgn(SkRegion* rgn) { rgn->setRect(fBase); SkIRect r = fBase; r.offset(75, 20); rgn->op(r, SkRegion::kUnion_Op); + } + + void build_rgn(SkRegion* rgn, SkRegion::Op op) { + build_base_rgn(rgn); rgn->op(fRect, op); } @@ -122,6 +226,23 @@ protected: return this->INHERITED::onQuery(evt); } + static void drawstr(SkCanvas* canvas, const char text[], const SkPoint& loc, + bool hilite) { + SkPaint paint; + paint.setAntiAlias(true); + paint.setTextSize(SkIntToScalar(20)); + paint.setColor(hilite ? SK_ColorRED : 0x40FF0000); + canvas->drawText(text, strlen(text), loc.fX, loc.fY, paint); + } + + void drawPredicates(SkCanvas* canvas, const SkPoint pts[]) { + SkRegion rgn; + build_base_rgn(&rgn); + + drawstr(canvas, "Intersects", pts[0], rgn.intersects(fRect)); + drawstr(canvas, "Contains", pts[1], rgn.contains(fRect)); + } + void drawOrig(SkCanvas* canvas, bool bg) { SkRect r; SkPaint paint; @@ -130,8 +251,10 @@ protected: if (bg) paint.setColor(0xFFBBBBBB); - r.set(fBase); - canvas->drawRect(r, paint); + SkRegion rgn; + build_base_rgn(&rgn); + paint_rgn(canvas, rgn, paint); + r.set(fRect); canvas->drawRect(r, paint); } @@ -198,6 +321,8 @@ protected: } virtual void onDrawContent(SkCanvas* canvas) { +// test_strokerect(canvas); return; +// test_text(canvas); return; #ifdef SK_DEBUG if (true) { SkRegion a, b, c; @@ -218,6 +343,11 @@ protected: } } #endif + const SkPoint origins[] = { + { 30*SK_Scalar1, 50*SK_Scalar1 }, + { 150*SK_Scalar1, 50*SK_Scalar1 }, + }; + this->drawPredicates(canvas, origins); static const struct { SkColor fColor; |