Add skia to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 123 insertions, 0 deletions

diff --git a/skia/svg/SkSVGGradient.cpp b/skia/svg/SkSVGGradient.cpp
new file mode 100644
index 0000000..d1fdc22
--- /dev/null
+++ b/skia/svg/SkSVGGradient.cpp
@@ -0,0 +1,123 @@
+/* libs/graphics/svg/SkSVGGradient.cpp
+**
+** Copyright 2006, Google Inc.
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+#include "SkSVGGradient.h"
+#include "SkSVGParser.h"
+#include "SkSVGStop.h"
+
+SkSVGGradient::SkSVGGradient() {
+}
+
+SkSVGElement* SkSVGGradient::getGradient() {
+    return this;
+}
+
+bool SkSVGGradient::isDef() {
+    return true;
+}
+
+bool SkSVGGradient::isNotDef() {
+    return false;
+}
+
+void SkSVGGradient::translate(SkSVGParser& parser, bool defState) {
+    INHERITED::translate(parser, defState);
+    // !!! no support for 'objectBoundingBox' yet
+    bool first = true;
+    bool addedFirst = false;
+    bool addedLast = false;
+    SkString offsets("[");
+    SkString* lastOffset = NULL;
+    for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
+        SkASSERT((*ptr)->getType() == SkSVGType_Stop);
+        SkSVGStop* stop = (SkSVGStop*) *ptr;
+        if (first && stop->f_offset.equals("0") == false) {
+            addedFirst = true;
+            offsets.append("0,");
+        }
+        SkString* thisOffset = &stop->f_offset;
+        if (lastOffset && thisOffset->equals(*lastOffset)) {
+            if (thisOffset->equals("1")) {
+                offsets.remove(offsets.size() - 2, 2);
+                offsets.append(".999,");
+            } else {
+                SkASSERT(0); // !!! need to write this case
+            }
+        }
+        offsets.append(*thisOffset);
+        if (ptr == fChildren.end() - 1) { // last
+            if (stop->f_offset.equals("1") == false) {
+                offsets.append(",1");
+                addedLast = true;
+            }
+        } else
+            offsets.appendUnichar(',');
+        first = false;
+        lastOffset = thisOffset;
+    }
+    offsets.appendUnichar(']');
+    parser._addAttribute("offsets", offsets);
+    if (addedFirst)
+        parser.translate(*fChildren.begin(), defState);
+    for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++)
+        parser.translate(*ptr, defState);
+    if (addedLast)
+        parser.translate(*(fChildren.end() - 1), defState);
+}
+
+void SkSVGGradient::translateGradientUnits(SkString& units) {
+    // !!! no support for 'objectBoundingBox' yet
+    SkASSERT(strcmp(units.c_str(), "userSpaceOnUse") == 0);
+}
+
+void SkSVGGradient::write(SkSVGParser& parser, SkString& baseColor) {
+    if (baseColor.c_str()[0] != '#')
+        return;
+    SkSVGPaint* saveHead = parser.fHead;
+    parser.fHead = &fPaintState;
+    parser.fSuppressPaint = true;
+    SkString originalID(f_id);
+    f_id.set("mask"); // write out gradient named given name + color (less initial #)
+    f_id.append(baseColor.c_str() + 1); 
+    SkString originalColors;
+    for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
+        SkSVGStop* colorElement = (SkSVGStop*) *ptr;
+        SkString& color = colorElement->fPaintState.f_stopColor;
+        originalColors.append(color);
+        originalColors.appendUnichar(',');
+        SkASSERT(color.c_str()[0] == '#');
+        SkString replacement;
+        replacement.set("0x");
+        replacement.append(color.c_str() + 1, 2); // add stop colors using given color, turning existing stop color into alpha
+        SkASSERT(baseColor.c_str()[0] == '#');
+        SkASSERT(baseColor.size() == 7);
+        replacement.append(baseColor.c_str() + 1);
+        color.set(replacement);
+    }
+    translate(parser, true);
+    const char* originalPtr = originalColors.c_str(); // restore original gradient values
+    for (SkSVGElement** ptr = fChildren.begin(); ptr < fChildren.end(); ptr++) {
+        SkSVGStop* color = (SkSVGStop*) *ptr;
+        const char* originalEnd = strchr(originalPtr, ',');
+        color->fPaintState.f_stopColor.set(originalPtr, originalEnd - originalPtr);
+        originalPtr = originalEnd + 1;
+    }
+    f_id.set(originalID);
+    parser.fSuppressPaint = false;
+    parser.fHead = saveHead;
+}
+