pdfviewer: add ability to run on gpu

experimental/PdfViewer/pdf_viewer_main.cpp

Index: experimental/PdfViewer/pdf_viewer_main.cpp
===================================================================
--- experimental/PdfViewer/pdf_viewer_main.cpp	(revision 10588)
+++ experimental/PdfViewer/pdf_viewer_main.cpp	(working copy)
@@ -11,6 +11,12 @@
 #include "SkTArray.h"
 #include "SkNulCanvas.h"
 
+#if SK_SUPPORT_GPU
+#include "GrContextFactory.h"
+#include "GrContext.h"
+#include "SkGpuDevice.h"
+#endif
+
 #include "SkPdfRenderer.h"
 
 DEFINE_string2(readPath, r, "", "pdf files or directories of pdf files to process.");
@@ -29,8 +35,12 @@
              "\tminimal parsing to ensure correctness. Default 0 (disabled).");
 DEFINE_int32(benchRender, 0, "Render the pdf content N times. Default 0 (disabled)");
 DEFINE_string2(config, c, "8888", "Canvas to render:\n"
-                                  "\t8888 - all pages\n"
-                                  "\tnul - all pages, in reverse order\n"
+                                  "\t8888 - argb\n"
+
+#if SK_SUPPORT_GPU
+                                  "\tgpu: use the gpu\n"
+#endif
+                                  "\tnul - render in null canvas, any draw will just return.\n"
                );
 
 
@@ -156,6 +166,10 @@
 extern "C" SkBitmap* gDumpBitmap;
 extern "C" SkCanvas* gDumpCanvas;
 
+#if SK_SUPPORT_GPU
+GrContextFactory gContextFactory;
+#endif
+
 static bool render_page(const SkString& outputDir,
                         const SkString& inputFilename,
                         const SkPdfRenderer& renderer,
@@ -183,7 +197,36 @@
 #else
         setup_bitmap(&bitmap, (int)SkScalarToDouble(width), (int)SkScalarToDouble(height));
 #endif
-        SkAutoTUnref<SkDevice> device(SkNEW_ARGS(SkDevice, (bitmap)));
+        SkAutoTUnref<SkDevice> device;
+        if (strcmp(FLAGS_config[0], "8888") == 0) {
+            device.reset(SkNEW_ARGS(SkDevice, (bitmap)));
+        }
+#if SK_SUPPORT_GPU
+        else if (strcmp(FLAGS_config[0], "gpu") == 0) {
+            SkAutoTUnref<GrSurface> target;
+            GrContext* gr = gContextFactory.get(GrContextFactory::kNative_GLContextType);
+            if (gr) {
+                // create a render target to back the device
+                GrTextureDesc desc;
+                desc.fConfig = kSkia8888_GrPixelConfig;
+                desc.fFlags = kRenderTarget_GrTextureFlagBit;
+                desc.fWidth = width;
+                desc.fHeight = height;
+                desc.fSampleCnt = 0;
+                target.reset(gr->createUncachedTexture(desc, NULL, 0));
+            }
+            if (NULL == target.get()) {
+                SkASSERT(0);
+                return false;
+            }
+
+            device.reset(SkGpuDevice::Create(target));
+        }
+#endif
+        else {
+            SkDebugf("unknown --config: %s\n", FLAGS_config[0]);
+            return false;
+        }
         SkCanvas canvas(device);
 
         gDumpBitmap = &bitmap;