Start writing the GTK code for test_shell.

Review URL: http://codereview.chromium.org/8000


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@4071 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 48 insertions, 12 deletions

diff --git a/base/gfx/bitmap_platform_device_linux.cc b/base/gfx/bitmap_platform_device_linux.cc
index 171f6b9..0569609 100644
--- a/base/gfx/bitmap_platform_device_linux.cc
+++ b/base/gfx/bitmap_platform_device_linux.cc
@@ -6,7 +6,8 @@
 
 #include "base/logging.h"
 
-#include <time.h>
+#include "gdk/gdk.h"
+#include "gdk-pixbuf/gdk-pixbuf.h"
 
 namespace gfx {
 
@@ -16,26 +17,39 @@ namespace gfx {
 // data.
 BitmapPlatformDeviceLinux* BitmapPlatformDeviceLinux::Create(
     int width, int height, bool is_opaque) {
+  GdkPixbuf* pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height);
+  if (!pixbuf)
+    return NULL;
+
+  DCHECK_EQ(gdk_pixbuf_get_colorspace(pixbuf), GDK_COLORSPACE_RGB);
+  DCHECK_EQ(gdk_pixbuf_get_bits_per_sample(pixbuf), 8);
+  DCHECK(gdk_pixbuf_get_has_alpha(pixbuf));
+  DCHECK_EQ(gdk_pixbuf_get_n_channels(pixbuf), 4);
+  DCHECK_EQ(gdk_pixbuf_get_width(pixbuf), width);
+  DCHECK_EQ(gdk_pixbuf_get_height(pixbuf), height);
+
   SkBitmap bitmap;
-  bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
+  bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height,
+                   gdk_pixbuf_get_rowstride(pixbuf));
+  bitmap.setPixels(gdk_pixbuf_get_pixels(pixbuf));
   bitmap.setIsOpaque(is_opaque);
 
-  if (is_opaque) {
 #ifndef NDEBUG
-    // To aid in finding bugs, we set the background color to something
-    // obviously wrong so it will be noticable when it is not cleared
+  if (is_opaque) {
     bitmap.eraseARGB(255, 0, 255, 128);  // bright bluish green
-#endif
   }
+#endif
 
   // The device object will take ownership of the graphics context.
-  return new BitmapPlatformDeviceLinux(bitmap);
+  return new BitmapPlatformDeviceLinux(bitmap, pixbuf);
 }
 
 // The device will own the bitmap, which corresponds to also owning the pixel
 // data. Therefore, we do not transfer ownership to the SkDevice's bitmap.
-BitmapPlatformDeviceLinux::BitmapPlatformDeviceLinux(const SkBitmap& bitmap)
-    : PlatformDeviceLinux(bitmap) {
+BitmapPlatformDeviceLinux::BitmapPlatformDeviceLinux(const SkBitmap& bitmap,
+                                                     GdkPixbuf* pixbuf)
+    : PlatformDeviceLinux(bitmap),
+      pixbuf_(pixbuf) {
 }
 
 BitmapPlatformDeviceLinux::BitmapPlatformDeviceLinux(
@@ -45,6 +59,10 @@ BitmapPlatformDeviceLinux::BitmapPlatformDeviceLinux(
 }
 
 BitmapPlatformDeviceLinux::~BitmapPlatformDeviceLinux() {
+  if (pixbuf_) {
+    g_object_unref(pixbuf_);
+    pixbuf_ = NULL;
+  }
 }
 
 }  // namespace gfx
diff --git a/base/gfx/bitmap_platform_device_linux.h b/base/gfx/bitmap_platform_device_linux.h
index 3059c2c..96a640c 100644
--- a/base/gfx/bitmap_platform_device_linux.h
+++ b/base/gfx/bitmap_platform_device_linux.h
@@ -8,10 +8,22 @@
 #include "base/gfx/platform_device_linux.h"
 #include "base/ref_counted.h"
 
+#include "gdk-pixbuf/gdk-pixbuf.h"
+
 namespace gfx {
 
-// I'm trying to get away with defining as little as possible on this. Right
-// now, we don't do anything.
+// -----------------------------------------------------------------------------
+// This is the Linux bitmap backing for Skia. It's a GdkPixbuf of the correct
+// size and we implement a SkPixelRef in order that Skia can write directly to
+// the pixel memory backing the Pixbuf.
+//
+// We then provide an accessor for getting the pixbuf object and that can be
+// drawn to a GDK drawing area to display the rendering result.
+//
+// This is all quite ok for test_shell. In the future we will want to use
+// shared memory between the renderer and the main process at least. In this
+// case we'll probably create the pixbuf from a precreated region of memory.
+// -----------------------------------------------------------------------------
 class BitmapPlatformDeviceLinux : public PlatformDeviceLinux {
  public:
   /// Static constructor. I don't understand this, it's just a copy of the mac
@@ -22,7 +34,7 @@ class BitmapPlatformDeviceLinux : public PlatformDeviceLinux {
   /// you should probably be using Create(). This may become private later if
   /// we ever have to share state between some native drawing UI and Skia, like
   /// the Windows and Mac versions of this class do.
-  BitmapPlatformDeviceLinux(const SkBitmap& other);
+  BitmapPlatformDeviceLinux(const SkBitmap& other, GdkPixbuf* pixbuf);
   virtual ~BitmapPlatformDeviceLinux();
 
   // A stub copy constructor.  Needs to be properly implemented.
@@ -30,6 +42,11 @@ class BitmapPlatformDeviceLinux : public PlatformDeviceLinux {
 
   // Bitmaps aren't vector graphics.
   virtual bool IsVectorial() { return false; }
+
+  GdkPixbuf* pixbuf() const { return pixbuf_; }
+
+ private:
+  GdkPixbuf* pixbuf_;
 };
 
 }  // namespace gfx
diff --git a/base/gfx/platform_canvas_linux.cc b/base/gfx/platform_canvas_linux.cc
index 71bc8f08..63ed3c2 100644
--- a/base/gfx/platform_canvas_linux.cc
+++ b/base/gfx/platform_canvas_linux.cc
@@ -4,6 +4,7 @@
 
 #include "base/gfx/platform_canvas_linux.h"
 
+#include "base/gfx/platform_device_linux.h"
 #include "base/gfx/bitmap_platform_device_linux.h"
 #include "base/logging.h"