4x4 SSAA with improvements in determination of when to apply. Still disabled at compile time.

Review URL: http://codereview.appspot.com/4445075/




git-svn-id: http://skia.googlecode.com/svn/trunk@1218 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 14 insertions, 5 deletions

diff --git a/samplecode/SampleVertices.cpp b/samplecode/SampleVertices.cpp
index f260e1af25..4557cc4e17 100644
--- a/samplecode/SampleVertices.cpp
+++ b/samplecode/SampleVertices.cpp
@@ -21,11 +21,20 @@
 
 static SkShader* make_shader0(SkIPoint* size) {
     SkBitmap    bm;
-
-    SkImageDecoder::DecodeFile("/skimages/logo.png", &bm);
-    size->set(bm.width(), bm.height());
-    return SkShader::CreateBitmapShader(bm, SkShader::kClamp_TileMode,
-                                        SkShader::kClamp_TileMode);
+    size->set(2, 2);
+    bm.setConfig(SkBitmap::kARGB_8888_Config, size->fX, size->fY);
+    SkPMColor color0 = SkPreMultiplyARGB(0x80, 0x80, 0xff, 0x80);
+    SkPMColor color1 = SkPreMultiplyARGB(0x40, 0xff, 0x00, 0xff);
+    bm.allocPixels();
+    bm.eraseColor(color0);
+    bm.lockPixels();
+    uint32_t* pixels = (uint32_t*) bm.getPixels();
+    pixels[0] = pixels[2] = color0;
+    pixels[1] = pixels[3] = color1;
+    bm.unlockPixels();
+
+    return SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
+                                            SkShader::kRepeat_TileMode);
 }
 
 static SkShader* make_shader1(const SkIPoint& size) {