add test for bug in line drawing. fix is pending a way to handle all of the

rebaselines...



git-svn-id: http://skia.googlecode.com/svn/trunk@6208 2bbb7eff-a529-9590-31e7-b0007b416f81

gm/fatpathfill.cpp

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "gm.h"
+#include "SkCanvas.h"
+#include "SkPath.h"
+#include "SkSurface.h"
+
+#define ZOOM    32
+#define SMALL_W 9
+#define SMALL_H 3
+#define REPEAT_LOOP 5
+
+static SkSurface* new_surface(int width, int height) {
+    SkImage::Info info = {
+        width,
+        height,
+        SkImage::kPMColor_ColorType,
+        SkImage::kPremul_AlphaType
+    };
+    return SkSurface::NewRaster(info, NULL);
+}
+
+static void draw_pixel_centers(SkCanvas* canvas) {
+    SkPaint paint;
+    paint.setColor(0xFF0088FF);
+    paint.setAntiAlias(true);
+    
+    for (int y = 0; y < SMALL_H; ++y) {
+        for (int x = 0; x < SMALL_W; ++x) {
+            canvas->drawCircle(x + 0.5f, y + 0.5f, 1.5f / ZOOM, paint);
+        }
+    }
+}
+
+static void draw_fatpath(SkCanvas* canvas, SkSurface* surface,
+                         const SkPath paths[], int count) {
+    SkPaint paint;
+
+    surface->getCanvas()->clear(0);
+    for (int i = 0; i < count; ++i) {
+        surface->getCanvas()->drawPath(paths[i], paint);
+    }
+    surface->draw(canvas, 0, 0, NULL);
+
+    paint.setAntiAlias(true);
+    paint.setColor(SK_ColorRED);
+    paint.setStyle(SkPaint::kStroke_Style);
+    for (int j = 0; j < count; ++j) {
+        canvas->drawPath(paths[j], paint);
+    }
+
+    draw_pixel_centers(canvas);
+}
+
+class FatPathFillGM : public skiagm::GM {
+public:
+    FatPathFillGM() {}
+
+protected:
+    virtual SkString onShortName() {
+        return SkString("fatpathfill");
+    }
+
+    virtual SkISize onISize() {
+        return SkISize::Make(SMALL_W * ZOOM, SMALL_H * ZOOM * REPEAT_LOOP);
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        SkAutoTUnref<SkSurface> surface(new_surface(SMALL_W, SMALL_H));
+
+        canvas->scale(ZOOM, ZOOM);
+
+        SkPaint paint;
+        paint.setStyle(SkPaint::kStroke_Style);
+        paint.setStrokeWidth(SK_Scalar1);
+
+        for (int i = 0; i < REPEAT_LOOP; ++i) {
+            SkPath line, path;
+            line.moveTo(1, 2); line.lineTo(4 + i, 1);
+            paint.getFillPath(line, &path);
+            draw_fatpath(canvas, surface, &path, 1);
+            
+            canvas->translate(0, SMALL_H);
+        }
+    }
+
+private:
+    typedef skiagm::GM INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+DEF_GM(return new FatPathFillGM;)
+

gm/gm.h

@@ -16,6 +16,10 @@
 #include "SkString.h"
 #include "SkTRegistry.h"
 
+#define DEF_GM(code) \
+    static skiagm::GM*          SK_MACRO_APPEND_LINE(F_)(void* p) { code; } \
+    static skiagm::GMRegistry   SK_MACRO_APPEND_LINE(R_)(SK_MACRO_APPEND_LINE(F_));
+
 namespace skiagm {
 
         static inline SkISize make_isize(int w, int h) {

gyp/gmslides.gypi

@@ -29,6 +29,7 @@
     '../gm/drawlooper.cpp',
     '../gm/extractbitmap.cpp',
     '../gm/emptypath.cpp',
+    '../gm/fatpathfill.cpp',
     '../gm/filltypes.cpp',
     '../gm/filltypespersp.cpp',
     '../gm/fontscaler.cpp',