[PDF] Fix fallout from r1217.

The width and height we pass to SkDevice must be postive.
Shader can no longer use negative coordinates (without transform).
Shader unflip matrix should use same values as passed to SkPDFDevice (height).
Most Shader dictionary entries should be scalars and not ints.

Review URL: http://codereview.appspot.com/4454047

git-svn-id: http://skia.googlecode.com/svn/trunk@1219 2bbb7eff-a529-9590-31e7-b0007b416f81

include/pdf/SkPDFDevice.h

@@ -61,6 +61,7 @@ public:
      *         inverse scale+translate to accommodate the one that SkPDFDevice
      *         always does.
      */
+    // TODO(vandebo) The sizes should be SkSize and not SkISize.
     SK_API SkPDFDevice(const SkISize& pageSize, const SkISize& contentSize,
                        const SkMatrix& initialTransform);
     SK_API virtual ~SkPDFDevice();

src/pdf/SkPDFDevice.cpp

@@ -135,7 +135,7 @@ static inline SkBitmap makeContentBitmap(const SkISize& contentSize,
     SkISize size = SkSize::Make(drawingSize.fX, drawingSize.fY).toRound();
 
     SkBitmap bitmap;
-    bitmap.setConfig(SkBitmap::kNo_Config, size.fWidth, size.fHeight);
+    bitmap.setConfig(SkBitmap::kNo_Config, abs(size.fWidth), abs(size.fHeight));
     return bitmap;
 }
 

src/pdf/SkPDFShader.cpp

@@ -496,12 +496,14 @@ void SkPDFShader::doImageShader() {
     transformBBox(finalMatrix, &surfaceBBox);
 
     SkMatrix unflip;
-    unflip.setTranslate(0, surfaceBBox.fBottom);
+    unflip.setTranslate(0, SkScalarRound(surfaceBBox.height()));
     unflip.preScale(1, -1);
-    SkISize size = SkISize::Make(surfaceBBox.width(), surfaceBBox.height());
+    SkISize size = SkISize::Make(SkScalarRound(surfaceBBox.width()),
+                                 SkScalarRound(surfaceBBox.height()));
     SkPDFDevice pattern(size, size, unflip);
     SkCanvas canvas(&pattern);
-    canvas.clipRect(surfaceBBox, SkRegion::kReplace_Op);
+    canvas.translate(-surfaceBBox.fLeft, -surfaceBBox.fTop);
+    finalMatrix.preTranslate(surfaceBBox.fLeft, surfaceBBox.fTop);
 
     const SkBitmap* image = &fState.get()->fImage;
     int width = image->width();
@@ -511,7 +513,8 @@ void SkPDFShader::doImageShader() {
     tileModes[1] = fState.get()->fImageTileModes[1];
 
     canvas.drawBitmap(*image, 0, 0);
-    SkRect patternBBox = SkRect::MakeWH(width, height);
+    SkRect patternBBox = SkRect::MakeXYWH(-surfaceBBox.fLeft, -surfaceBBox.fTop,
+                                          width, height);
 
     // Tiling is implied.  First we handle mirroring.
     if (tileModes[0] == SkShader::kMirror_TileMode) {
@@ -589,7 +592,7 @@ void SkPDFShader::doImageShader() {
                 leftMatrix.postTranslate(0, 2 * height);
                 canvas.drawBitmapMatrix(left, leftMatrix);
             }
-            patternBBox.fLeft = surfaceBBox.fLeft;
+            patternBBox.fLeft = 0;
         }
 
         if (surfaceBBox.fRight > width) {
@@ -607,7 +610,7 @@ void SkPDFShader::doImageShader() {
                 rightMatrix.postTranslate(0, 2 * height);
                 canvas.drawBitmapMatrix(right, rightMatrix);
             }
-            patternBBox.fRight = surfaceBBox.fRight;
+            patternBBox.fRight = surfaceBBox.width();
         }
     }
 
@@ -627,7 +630,7 @@ void SkPDFShader::doImageShader() {
                 topMatrix.postTranslate(2 * width, 0);
                 canvas.drawBitmapMatrix(top, topMatrix);
             }
-            patternBBox.fTop = surfaceBBox.fTop;
+            patternBBox.fTop = 0;
         }
 
         if (surfaceBBox.fBottom > height) {
@@ -645,17 +648,17 @@ void SkPDFShader::doImageShader() {
                 bottomMatrix.postTranslate(2 * width, 0);
                 canvas.drawBitmapMatrix(bottom, bottomMatrix);
             }
-            patternBBox.fBottom = surfaceBBox.fBottom;
+            patternBBox.fBottom = surfaceBBox.height();
         }
     }
 
     SkRefPtr<SkPDFArray> patternBBoxArray = new SkPDFArray;
     patternBBoxArray->unref();  // SkRefPtr and new both took a reference.
     patternBBoxArray->reserve(4);
-    patternBBoxArray->append(new SkPDFInt(patternBBox.fLeft))->unref();
-    patternBBoxArray->append(new SkPDFInt(patternBBox.fTop))->unref();
-    patternBBoxArray->append(new SkPDFInt(patternBBox.fRight))->unref();
-    patternBBoxArray->append(new SkPDFInt(patternBBox.fBottom))->unref();
+    patternBBoxArray->append(new SkPDFScalar(patternBBox.fLeft))->unref();
+    patternBBoxArray->append(new SkPDFScalar(patternBBox.fTop))->unref();
+    patternBBoxArray->append(new SkPDFScalar(patternBBox.fRight))->unref();
+    patternBBoxArray->append(new SkPDFScalar(patternBBox.fBottom))->unref();
 
     // Put the canvas into the pattern stream (fContent).
     SkRefPtr<SkStream> content = pattern.content();
@@ -669,8 +672,8 @@ void SkPDFShader::doImageShader() {
     fContent->insert("PaintType", new SkPDFInt(1))->unref();
     fContent->insert("TilingType", new SkPDFInt(1))->unref();
     fContent->insert("BBox", patternBBoxArray.get());
-    fContent->insert("XStep", new SkPDFInt(patternBBox.width()))->unref();
-    fContent->insert("YStep", new SkPDFInt(patternBBox.height()))->unref();
+    fContent->insert("XStep", new SkPDFScalar(patternBBox.width()))->unref();
+    fContent->insert("YStep", new SkPDFScalar(patternBBox.height()))->unref();
     fContent->insert("Resources", pattern.getResourceDict().get());
     fContent->insert("Matrix", SkPDFUtils::MatrixToArray(finalMatrix))->unref();