add SkSfntUtils to parse some known truetype tables

add comments and cleanup to count_tables in SkFontHost_tables.cpp
fix transparency bug in gifs
use (alpha+1) for blending in srcover mode, to ensure opaque results



git-svn-id: http://skia.googlecode.com/svn/trunk@155 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 17 insertions, 0 deletions

diff --git a/bench/TextBench.cpp b/bench/TextBench.cpp
index adbd96281b..ebd2b33215 100644
--- a/bench/TextBench.cpp
+++ b/bench/TextBench.cpp
@@ -3,6 +3,7 @@
 #include "SkFontHost.h"
 #include "SkPaint.h"
 #include "SkRandom.h"
+#include "SkSfntUtils.h"
 #include "SkString.h"
 #include "SkTemplates.h"
 
@@ -22,6 +23,22 @@ static void dump_font(const char name[], SkFontID fontID) {
                  uint8_t(tag>>24), uint8_t(tag>>16), uint8_t(tag>>8), uint8_t(tag),
                  size, bytes, data[0], data[1], data[2], data[3]);
     }
+    
+    SkSfntTable_head head;
+    if (SkSfntUtils::ReadTable_head(fontID, &head)) {
+        SkDebugf("--- head: version=%x magic=%x upem=%d style=%x\n", head.fVersion,
+                 head.fMagicNumber, head.fUnitsPerEm, head.fMacStyle);
+    } else {
+        SkDebugf("------- head wasn't read\n");
+    }
+
+    SkSfntTable_maxp maxp;
+    if (SkSfntUtils::ReadTable_maxp(fontID, &maxp)) {
+        SkDebugf("--- maxp: version=%x glyphs=%d points=%d ctrs=%d\n", maxp.fVersion,
+                 maxp.fNumGlyphs, maxp.fMaxPoints, maxp.fMaxContours);
+    } else {
+        SkDebugf("------- maxp wasn't read\n");
+    }
 }
 
 static void test_tables() {