re-landing; b=412396, speed up mac image rendering while images are being loaded, r=stuart

gfx/cairo/README

@@ -28,3 +28,5 @@ nonfatal-assertions.patch: Make assertions non-fatal
 endian.patch: include cairo-platform.h for endian macros
 
 fixed-24-8.patch: Switch fixed point mode from 16.16 to 24.8
+
+quartz-get-image-surface.patch: Add cairo_quartz_get_image_surface API analogous to the win32 one

gfx/cairo/cairo/src/cairo-quartz-private.h

@@ -48,6 +48,8 @@ typedef struct cairo_quartz_surface {
 
     void *imageData;
 
+    cairo_surface_t *imageSurfaceEquiv;
+
     CGContextRef cgContext;
     CGAffineTransform cgContextBaseCTM;
 

gfx/cairo/cairo/src/cairo-quartz-surface.c

@@ -937,6 +937,11 @@ _cairo_quartz_get_image (cairo_quartz_surface_t *surface,
 	return CAIRO_STATUS_SUCCESS;
     }
 
+    if (surface->imageSurfaceEquiv) {
+	*image_out = (cairo_image_surface_t*) cairo_surface_reference(surface->imageSurfaceEquiv);
+	return CAIRO_STATUS_SUCCESS;
+    }
+
     if (CGBitmapContextGetBitsPerPixel(surface->cgContext) != 0) {
 	unsigned int stride;
 	unsigned int bitinfo;
@@ -945,6 +950,7 @@ _cairo_quartz_get_image (cairo_quartz_surface_t *surface,
 	unsigned int color_comps;
 
 	imageData = (unsigned char *) CGBitmapContextGetData(surface->cgContext);
+
 #ifdef USE_10_3_WORKAROUNDS
 	bitinfo = CGBitmapContextGetAlphaInfo (surface->cgContext);
 #else
@@ -1029,6 +1035,11 @@ _cairo_quartz_surface_finish (void *abstract_surface)
 
     surface->cgContext = NULL;
 
+    if (surface->imageSurfaceEquiv) {
+	cairo_surface_destroy (surface->imageSurfaceEquiv);
+	surface->imageSurfaceEquiv = NULL;
+    }
+
     if (surface->imageData) {
 	free (surface->imageData);
 	surface->imageData = NULL;
@@ -1871,6 +1882,7 @@ _cairo_quartz_surface_create_internal (CGContextRef cgContext,
     surface->cgContextBaseCTM = CGContextGetCTM (cgContext);
 
     surface->imageData = NULL;
+    surface->imageSurfaceEquiv = NULL;
 
     return surface;
 }
@@ -2025,6 +2037,7 @@ cairo_quartz_surface_create (cairo_format_t format,
     }
 
     surf->imageData = imageData;
+    surf->imageSurfaceEquiv = cairo_image_surface_create_for_data (imageData, format, width, height, stride);
 
     return (cairo_surface_t *) surf;
 }
@@ -2152,3 +2165,14 @@ quartz_surface_to_png (cairo_quartz_surface_t *nq, char *dest)
 #endif
 }
 
+cairo_surface_t *
+cairo_quartz_surface_get_image (cairo_surface_t *surface)
+{
+    cairo_quartz_surface_t *quartz = (cairo_quartz_surface_t*)surface;
+
+    if (cairo_surface_get_type(surface) != CAIRO_SURFACE_TYPE_QUARTZ)
+	return NULL;
+
+    return quartz->imageSurfaceEquiv;
+}
+

gfx/cairo/cairo/src/cairo-quartz.h

@@ -57,6 +57,9 @@ cairo_quartz_surface_create_for_cg_context (CGContextRef cgContext,
 cairo_public CGContextRef
 cairo_quartz_surface_get_cg_context (cairo_surface_t *surface);
 
+cairo_public cairo_surface_t *
+cairo_quartz_surface_get_image (cairo_surface_t *surface);
+
 CAIRO_END_DECLS
 
 #else  /* CAIRO_HAS_QUARTZ_SURFACE */

gfx/cairo/cairo/src/cairo-rename.h

@@ -169,6 +169,7 @@
 #define cairo_quartz_surface_create _moz_cairo_quartz_surface_create
 #define cairo_quartz_surface_create_for_cg_context _moz_cairo_quartz_surface_create_for_cg_context
 #define cairo_quartz_surface_get_cg_context _moz_cairo_quartz_surface_get_cg_context
+#define cairo_quartz_surface_get_image _moz_cairo_quartz_surface_get_image
 #define cairo_rectangle _moz_cairo_rectangle
 #define cairo_rectangle_list_destroy _moz_cairo_rectangle_list_destroy
 #define cairo_reference _moz_cairo_reference

gfx/src/thebes/nsThebesImage.cpp

@@ -111,7 +111,7 @@ nsThebesImage::Init(PRInt32 aWidth, PRInt32 aHeight, PRInt32 aDepth, nsMaskRequi
 
     mFormat = format;
 
-#ifdef XP_WIN
+#if defined(XP_WIN)
     if (!ShouldUseImageSurfaces()) {
         mWinSurface = new gfxWindowsSurface(gfxIntSize(mWidth, mHeight), format);
         if (mWinSurface && mWinSurface->CairoStatus() == 0) {
@@ -120,14 +120,23 @@ nsThebesImage::Init(PRInt32 aWidth, PRInt32 aHeight, PRInt32 aDepth, nsMaskRequi
         }
     }
 
-    if (!mImageSurface) {
+    if (!mImageSurface)
         mWinSurface = nsnull;
-        mImageSurface = new gfxImageSurface(gfxIntSize(mWidth, mHeight), format);
+#elif defined(XP_MACOSX)
+    if (!ShouldUseImageSurfaces()) {
+        mQuartzSurface = new gfxQuartzSurface(gfxSize(mWidth, mHeight), format);
+        if (mQuartzSurface && mQuartzSurface->CairoStatus() == 0) {
+            mImageSurface = mQuartzSurface->GetImageSurface();
         }
-#else
-    mImageSurface = new gfxImageSurface(gfxIntSize(mWidth, mHeight), format);
+    }
+
+    if (!mImageSurface)
+        mQuartzSurface = nsnull;
 #endif
 
+    if (!mImageSurface)
+        mImageSurface = new gfxImageSurface(gfxIntSize(mWidth, mHeight), format);
+
     if (!mImageSurface || mImageSurface->CairoStatus()) {
         mImageSurface = nsnull;
         // guess
@@ -298,6 +307,11 @@ nsThebesImage::Optimize(nsIDeviceContext* aContext)
     }
 #endif
 
+#ifdef XP_MACOSX
+    if (mQuartzSurface && !mFormatChanged)
+        mOptSurface = mQuartzSurface;
+#endif
+
     if (mOptSurface == nsnull)
         mOptSurface = gfxPlatform::GetPlatform()->OptimizeImage(mImageSurface, mFormat);
 
@@ -305,6 +319,9 @@ nsThebesImage::Optimize(nsIDeviceContext* aContext)
         mImageSurface = nsnull;
 #ifdef XP_WIN
         mWinSurface = nsnull;
+#endif
+#ifdef XP_MACOSX
+        mQuartzSurface = nsnull;
 #endif
     }
 

gfx/src/thebes/nsThebesImage.h

@@ -44,8 +44,10 @@
 #include "gfxColor.h"
 #include "gfxASurface.h"
 #include "gfxImageSurface.h"
-#ifdef XP_WIN
+#if defined(XP_WIN)
 #include "gfxWindowsSurface.h"
+#elif defined(XP_MACOSX)
+#include "gfxQuartzSurface.h"
 #endif
 
 class nsThebesImage : public nsIImage
@@ -97,7 +99,13 @@ public:
     gfxASurface* ThebesSurface() {
         if (mOptSurface)
             return mOptSurface;
-
+#if defined(XP_WIN)
+        if (mWinSurface)
+            return mWinSurface;
+#elif defined(XP_MACOSX)
+        if (mQuartzSurface)
+            return mQuartzSurface;
+#endif
         return mImageSurface;
     }
 
@@ -151,8 +159,10 @@ protected:
 
     nsRefPtr<gfxImageSurface> mImageSurface;
     nsRefPtr<gfxASurface> mOptSurface;
-#ifdef XP_WIN
+#if defined(XP_WIN)
     nsRefPtr<gfxWindowsSurface> mWinSurface;
+#elif defined(XP_MACOSX)
+    nsRefPtr<gfxQuartzSurface> mQuartzSurface;
 #endif
 
     PRUint8 mAlphaDepth;

gfx/thebes/public/gfxQuartzSurface.h

@@ -40,6 +40,7 @@
 #define GFX_QUARTZSURFACE_H
 
 #include "gfxASurface.h"
+#include "gfxImageSurface.h"
 
 #include <Carbon/Carbon.h>
 
@@ -57,6 +58,8 @@ public:
 
     virtual PRInt32 GetDefaultContextFlags() const;
 
+    already_AddRefed<gfxImageSurface> GetImageSurface();
+
 protected:
     CGContextRef mCGContext;
     gfxSize      mSize;

gfx/thebes/src/gfxQuartzSurface.cpp

@@ -94,3 +94,23 @@ gfxQuartzSurface::~gfxQuartzSurface()
 {
     CGContextRelease(mCGContext);
 }
+
+already_AddRefed<gfxImageSurface>
+gfxQuartzSurface::GetImageSurface()
+{
+    if (!mSurfaceValid) {
+        NS_WARNING ("GetImageSurface on an invalid (null) surface; who's calling this without checking for surface errors?");
+        return nsnull;
+    }
+
+    NS_ASSERTION(CairoSurface() != nsnull, "CairoSurface() shouldn't be nsnull when mSurfaceValid is TRUE!");
+
+    cairo_surface_t *isurf = cairo_quartz_surface_get_image(CairoSurface());
+    if (!isurf)
+        return nsnull;
+
+    nsRefPtr<gfxASurface> asurf = gfxASurface::Wrap(isurf);
+    gfxImageSurface *imgsurf = (gfxImageSurface*) asurf.get();
+    NS_ADDREF(imgsurf);
+    return imgsurf;
+}

gfx/thebes/src/gfxWindowsSurface.cpp

@@ -125,6 +125,13 @@ gfxWindowsSurface::~gfxWindowsSurface()
 already_AddRefed<gfxImageSurface>
 gfxWindowsSurface::GetImageSurface()
 {
+    if (!mSurfaceValid) {
+        NS_WARNING ("GetImageSurface on an invalid (null) surface; who's calling this without checking for surface errors?");
+        return nsnull;
+    }
+
+    NS_ASSERTION(CairoSurface() != nsnull, "CairoSurface() shouldn't be nsnull when mSurfaceValid is TRUE!");
+
     if (mForPrinting)
         return nsnull;