SkPDF: Implement drawImage*() properly

gm/repeated_bitmap.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
+#include "Resources.h"
+#include "SkImage.h"
 #include "gm.h"
 #include "sk_tool_utils.h"
-#include "Resources.h"
 
-DEF_SIMPLE_GM(repeated_bitmap, canvas, 576, 576) {
-    sk_tool_utils::draw_checkerboard(canvas, sk_tool_utils::color_to_565(0xFF999999),
+static void draw_rotated_image(SkCanvas* canvas, const SkImage* image) {
+    sk_tool_utils::draw_checkerboard(canvas, SkColorSetRGB(156, 154, 156),
                                      SK_ColorWHITE, 12);
-    SkRect rect = SkRect::MakeLTRB(-4.25f, -4.25f, 4.25f, 4.25f);
+    if (!image) {
+        return;
+    }
+    SkRect rect = SkRect::MakeLTRB(-68.0f, -68.0f, 68.0f, 68.0f);
     SkPaint paint;
-    paint.setColor(0xFF333333);
-    SkBitmap bm;
-    if (GetResourceAsBitmap("randPixels.png", &bm)) {
-        for (int j = 0; j < 4; ++j) {
-            for (int i = 0; i < 4; ++i) {
-                SkAutoCanvasRestore autoCanvasRestore(canvas, true);
-                canvas->scale(12.0f, 12.0f);
-                canvas->translate(6.0f + 12.0f * SkIntToScalar(i),
-                                  6.0f + 12.0f * SkIntToScalar(j));
-                canvas->rotate(18.0f * (i + 4 * j));
-                canvas->drawRect(rect, paint);
-                canvas->drawBitmap(bm, -4.0f, -4.0f);
-            }
+    paint.setColor(SkColorSetRGB(49, 48, 49));
+    SkScalar scale = SkTMin(128.0f / image->width(),
+                            128.0f / image->height());
+    SkScalar point[2] = {-0.5f * image->width(), -0.5f * image->height()};
+    for (int j = 0; j < 4; ++j) {
+        for (int i = 0; i < 4; ++i) {
+            SkAutoCanvasRestore autoCanvasRestore(canvas, true);
+            canvas->translate(96.0f + 192.0f * i, 96.0f + 192.0f * j);
+            canvas->rotate(18.0f * (i + 4 * j));
+            canvas->drawRect(rect, paint);
+            canvas->scale(scale, scale);
+            canvas->drawImage(image, point[0], point[1]);
         }
     }
 }
 
+DEF_SIMPLE_GM(repeated_bitmap, canvas, 576, 576) {
+    SkAutoTUnref<SkImage> image(GetResourceAsImage("randPixels.png"));
+    draw_rotated_image(canvas, image);
+}
+
 DEF_SIMPLE_GM(repeated_bitmap_jpg, canvas, 576, 576) {
-    sk_tool_utils::draw_checkerboard(canvas, sk_tool_utils::color_to_565(0xFF999999),
-                                     SK_ColorWHITE, 12);
-    SkRect rect = SkRect::MakeLTRB(-68.0f, -68.0f, 68.0f, 68.0f);
-    SkPaint paint;
-    paint.setColor(0xFF333333);
-    SkBitmap bm;
-    if (GetResourceAsBitmap("color_wheel.jpg", &bm)) {
-        for (int j = 0; j < 4; ++j) {
-            for (int i = 0; i < 4; ++i) {
-                SkAutoCanvasRestore autoCanvasRestore(canvas, true);
-                canvas->translate(96.0f + 192.0f * SkIntToScalar(i),
-                                  96.0f + 192.0f * SkIntToScalar(j));
-                canvas->rotate(18.0f * (i + 4 * j));
-                canvas->drawRect(rect, paint);
-                canvas->drawBitmap(bm, -64.0f, -64.0f);
-            }
-        }
-    }
+    SkAutoTUnref<SkImage> image(GetResourceAsImage("color_wheel.jpg"));
+    draw_rotated_image(canvas, image);
 }