1 files changed, 105 insertions, 0 deletions
diff --git a/gfx/thebes/gfxXlibNativeRenderer.h b/gfx/thebes/gfxXlibNativeRenderer.h
new file mode 100644
index 000000000..85af130ca
--- /dev/null
+++ b/gfx/thebes/gfxXlibNativeRenderer.h
@@ -0,0 +1,105 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GFXXLIBNATIVERENDER_H_
+#define GFXXLIBNATIVERENDER_H_
+
+#include "nsPoint.h"
+#include "nsRect.h"
+#include "mozilla/gfx/Rect.h"
+#include "mozilla/gfx/Point.h"
+#include <X11/Xlib.h>
+
+namespace mozilla {
+namespace gfx {
+  class DrawTarget;
+}
+}
+
+class gfxASurface;
+class gfxContext;
+typedef struct _cairo cairo_t;
+typedef struct _cairo_surface cairo_surface_t;
+
+/**
+ * This class lets us take code that draws into an X drawable and lets us
+ * use it to draw into any Thebes context. The user should subclass this class,
+ * override DrawWithXib, and then call Draw(). The drawing will be subjected
+ * to all Thebes transformations, clipping etc.
+ */
+class gfxXlibNativeRenderer {
+public:
+    /**
+     * Perform the native drawing.
+     * @param surface the cairo_surface_t for drawing. Must be a cairo_xlib_surface_t.
+     *                The extents of this surface do not necessarily cover the
+     *                entire rectangle with size provided to Draw().
+     * @param offset  draw at this offset into the given drawable
+     * @param clipRects an array of rectangles; clip to the union.
+     *                  Any rectangles provided will be contained by the
+     *                  rectangle with size provided to Draw and by the
+     *                  surface extents.
+     * @param numClipRects the number of rects in the array, or zero if
+     *                     no clipping is required.
+     */
+    virtual nsresult DrawWithXlib(cairo_surface_t* surface,
+                                  mozilla::gfx::IntPoint offset,
+                                  mozilla::gfx::IntRect* clipRects,
+                                  uint32_t numClipRects) = 0;
+  
+    enum {
+        // If set, then Draw() is opaque, i.e., every pixel in the intersection
+        // of the clipRect and (offset.x,offset.y,bounds.width,bounds.height)
+        // will be set and there is no dependence on what the existing pixels
+        // in the drawable are set to.
+        DRAW_IS_OPAQUE = 0x01,
+        // If set, then numClipRects can be zero or one
+        DRAW_SUPPORTS_CLIP_RECT = 0x04,
+        // If set, then numClipRects can be any value. If neither this
+        // nor CLIP_RECT are set, then numClipRects will be zero
+        DRAW_SUPPORTS_CLIP_LIST = 0x08,
+        // If set, then the surface in the callback may have any visual;
+        // otherwise the pixels will have the same format as the visual
+        // passed to 'Draw'.
+        DRAW_SUPPORTS_ALTERNATE_VISUAL = 0x10,
+        // If set, then the Screen 'screen' in the callback can be different
+        // from the default Screen of the display passed to 'Draw' and can be
+        // on a different display.
+        DRAW_SUPPORTS_ALTERNATE_SCREEN = 0x20
+    };
+
+    /**
+     * @param flags see above
+     * @param size the size of the rectangle being drawn;
+     * the caller guarantees that drawing will not extend beyond the rectangle
+     * (0,0,size.width,size.height).
+     * @param screen a Screen to use for the drawing if ctx doesn't have one.
+     * @param visual a Visual to use for the drawing if ctx doesn't have one.
+     * @param result if non-null, we will try to capture a copy of the
+     * rendered image into a surface similar to the surface of ctx; if
+     * successful, a pointer to the new gfxASurface is stored in *resultSurface,
+     * otherwise *resultSurface is set to nullptr.
+     */
+    void Draw(gfxContext* ctx, mozilla::gfx::IntSize size,
+              uint32_t flags, Screen *screen, Visual *visual);
+
+private:
+    bool DrawDirect(mozilla::gfx::DrawTarget* aDT, mozilla::gfx::IntSize bounds,
+                    uint32_t flags, Screen *screen, Visual *visual);
+
+    bool DrawCairo(cairo_t* cr, mozilla::gfx::IntSize size,
+                   uint32_t flags, Screen *screen, Visual *visual);
+
+    void DrawFallback(mozilla::gfx::DrawTarget* dt, gfxContext* ctx,
+                      gfxASurface* aSurface, mozilla::gfx::IntSize& size,
+                      mozilla::gfx::IntRect& drawingRect, bool canDrawOverBackground,
+                      uint32_t flags, Screen* screen, Visual* visual);
+
+    bool DrawOntoTempSurface(cairo_surface_t *tempXlibSurface,
+                             mozilla::gfx::IntPoint offset);
+
+};
+
+#endif /*GFXXLIBNATIVERENDER_H_*/