add skhello for simple hello-world sample code
git-svn-id: http://skia.googlecode.com/svn/trunk@539 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/skhello.cpp b/tools/skhello.cpp
new file mode 100644
index 0000000..6f56d4c
--- /dev/null
+++ b/tools/skhello.cpp
@@ -0,0 +1,65 @@
+#include "SkCanvas.h"
+#include "SkGraphics.h"
+//#include "SkImageDecoder.h"
+#include "SkImageEncoder.h"
+//#include "SkStream.h"
+#include "SkString.h"
+#include "SkTemplates.h"
+
+static void show_help() {
+ SkDebugf("usage: skhello [-o out-dir] [-t 'hello']\n default output: skhello.png\n");
+}
+
+int main (int argc, char * const argv[]) {
+ SkAutoGraphics ag;
+ SkString path("skhello.png");
+ SkString text("Hello");
+
+ for (int i = 1; i < argc; i++) {
+ if (!strcmp(argv[i], "--help")) {
+ show_help();
+ return 0;
+ }
+ if (!strcmp(argv[i], "-o")) {
+ if (i == argc-1) {
+ SkDebugf("ERROR: -o needs a following filename\n");
+ return -1;
+ }
+ path.set(argv[i+1]);
+ i += 1; // skip the out dir name
+ } else if (!strcmp(argv[i], "-t")) {
+ if (i == argc-1) {
+ SkDebugf("ERROR: -t needs a following string\n");
+ return -1;
+ }
+ text.set(argv[i+1]);
+ i += 1; // skip the text string
+ }
+ }
+
+ SkPaint paint;
+ paint.setAntiAlias(true);
+ paint.setTextSize(SkIntToScalar(30));
+ SkScalar width = paint.measureText(text.c_str(), text.size());
+ SkScalar spacing = paint.getFontSpacing();
+
+ int w = SkScalarRound(width) + 30;
+ int h = SkScalarRound(spacing) + 30;
+ SkBitmap bitmap;
+ bitmap.setConfig(SkBitmap::kARGB_8888_Config, w, h);
+ bitmap.allocPixels();
+
+ SkCanvas canvas(bitmap);
+ canvas.drawColor(SK_ColorWHITE);
+
+ paint.setTextAlign(SkPaint::kCenter_Align);
+ canvas.drawText(text.c_str(), text.size(),
+ SkIntToScalar(w)/2, SkIntToScalar(h)*2/3,
+ paint);
+
+ SkImageEncoder::EncodeFile(path.c_str(), bitmap,
+ SkImageEncoder::kPNG_Type, 100);
+
+ return 0;
+}
+