add SetFlags for command line control
http://codereview.appspot.com/5416047/
M include/core/SkGraphics.h
M src/core/SkGraphics.cpp
git-svn-id: http://skia.googlecode.com/svn/trunk@2727 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/core/SkGraphics.h b/include/core/SkGraphics.h
index 17a2611..b41da32 100644
--- a/include/core/SkGraphics.h
+++ b/include/core/SkGraphics.h
@@ -45,6 +45,16 @@
* draws to be recreated, since they will no longer be in the cache.
*/
static void PurgeFontCache();
+
+ /**
+ * Applications with command line options may pass optional state, such
+ * as cache sizes, here, for instance:
+ * font-cache-limit=12345678
+ *
+ * The flags format is name=value[;name=value...] with no spaces.
+ * This format is subject to change.
+ */
+ static void SetFlags(const char* flags);
private:
/** This is automatically called by SkGraphics::Init(), and must be
diff --git a/src/core/SkGraphics.cpp b/src/core/SkGraphics.cpp
index a69ac37..8ae4944 100644
--- a/src/core/SkGraphics.cpp
+++ b/src/core/SkGraphics.cpp
@@ -157,3 +157,50 @@
SkGlyphCache::SetCacheUsed(0);
}
+///////////////////////////////////////////////////////////////////////////////
+
+static const char kFontCacheLimitStr[] = "font-cache-limit";
+static const size_t kFontCacheLimitLen = sizeof(kFontCacheLimitStr) - 1;
+
+static const struct {
+ const char* fStr;
+ size_t fLen;
+ size_t (*fFunc)(size_t);
+} gFlags[] = {
+ {kFontCacheLimitStr, kFontCacheLimitLen, SkGraphics::SetFontCacheLimit}
+};
+
+/* flags are of the form param; or param=value; */
+void SkGraphics::SetFlags(const char* flags) {
+ if (!flags) {
+ return;
+ }
+ const char* nextSemi;
+ do {
+ size_t len = strlen(flags);
+ const char* paramEnd = flags + len;
+ const char* nextEqual = strchr(flags, '=');
+ if (nextEqual && paramEnd > nextEqual) {
+ paramEnd = nextEqual;
+ }
+ nextSemi = strchr(flags, ';');
+ if (nextSemi && paramEnd > nextSemi) {
+ paramEnd = nextSemi;
+ }
+ size_t paramLen = paramEnd - flags;
+ for (int i = 0; i < (int)SK_ARRAY_COUNT(gFlags); ++i) {
+ if (paramLen != gFlags[i].fLen) {
+ continue;
+ }
+ if (strncmp(flags, gFlags[i].fStr, paramLen) == 0) {
+ size_t val = 0;
+ if (nextEqual) {
+ val = (size_t) atoi(nextEqual + 1);
+ }
+ (gFlags[i].fFunc)(val);
+ break;
+ }
+ }
+ flags = nextSemi + 1;
+ } while (nextSemi);
+}