mirror of
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182 lines
6.1 KiB
Diff
182 lines
6.1 KiB
Diff
b=455513; add optional flag to allow converting a DDB to a DIB internally, if the surface is every used as a source; r=jmuizelaar
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If a DDB is used as a source for an operation that can't be handled
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natively by GDI, we end up needing to take a really slow path (creating a
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temporary surface for acquire_source) for each operation. If we convert
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the DDB to a DIB, we then end up having a real image buffer and can hand
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things off to pixman directly.
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This isn't the default mode because I'm not sure if there are cases where a
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DDB is explicitly needed (e.g. for printing), and it would change
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current cairo behaviour. It might become the default at some point in the
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future.
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diff --git a/gfx/cairo/cairo/src/cairo-win32-private.h b/gfx/cairo/cairo/src/cairo-win32-private.h
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--- a/gfx/cairo/cairo/src/cairo-win32-private.h
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+++ b/gfx/cairo/cairo/src/cairo-win32-private.h
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@@ -117,6 +117,9 @@
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/* Whether we can use the CHECKJPEGFORMAT escape function */
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CAIRO_WIN32_SURFACE_CAN_CHECK_PNG = (1<<8),
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+
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+ /* if this DDB surface can be converted to a DIB if necessary */
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+ CAIRO_WIN32_SURFACE_CAN_CONVERT_TO_DIB = (1<<9),
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};
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cairo_status_t
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diff --git a/gfx/cairo/cairo/src/cairo-win32-surface.c b/gfx/cairo/cairo/src/cairo-win32-surface.c
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--- a/gfx/cairo/cairo/src/cairo-win32-surface.c
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+++ b/gfx/cairo/cairo/src/cairo-win32-surface.c
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@@ -560,6 +560,56 @@
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return CAIRO_STATUS_SUCCESS;
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}
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+static void
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+_cairo_win32_convert_ddb_to_dib (cairo_win32_surface_t *surface)
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+{
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+ cairo_win32_surface_t *new_surface;
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+ int width = surface->extents.width;
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+ int height = surface->extents.height;
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+
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+ BOOL ok;
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+ HBITMAP oldbitmap;
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+
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+ new_surface = (cairo_win32_surface_t*)
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+ _cairo_win32_surface_create_for_dc (surface->dc,
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+ surface->format,
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+ width,
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+ height);
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+
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+ if (new_surface->base.status)
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+ return;
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+
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+ /* DDB can't be 32bpp, so BitBlt is safe */
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+ ok = BitBlt (new_surface->dc,
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+ 0, 0, width, height,
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+ surface->dc,
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+ 0, 0, SRCCOPY);
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+
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+ if (!ok)
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+ goto out;
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+
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+ /* Now swap around new_surface and surface's internal bitmap
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+ * pointers. */
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+ DeleteDC (new_surface->dc);
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+ new_surface->dc = NULL;
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+
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+ oldbitmap = SelectObject (surface->dc, new_surface->bitmap);
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+ DeleteObject (oldbitmap);
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+
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+ surface->image = new_surface->image;
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+ surface->is_dib = new_surface->is_dib;
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+ surface->bitmap = new_surface->bitmap;
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+
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+ new_surface->bitmap = NULL;
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+ new_surface->image = NULL;
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+
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+ /* Finally update flags */
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+ surface->flags = _cairo_win32_flags_for_dc (surface->dc);
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+
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+ out:
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+ cairo_surface_destroy ((cairo_surface_t*)new_surface);
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+}
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+
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static cairo_status_t
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_cairo_win32_surface_acquire_source_image (void *abstract_surface,
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cairo_image_surface_t **image_out,
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@@ -568,6 +618,17 @@
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cairo_win32_surface_t *surface = abstract_surface;
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cairo_win32_surface_t *local = NULL;
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cairo_status_t status;
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+
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+ if (!surface->image && !surface->is_dib && surface->bitmap &&
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+ (surface->flags & CAIRO_WIN32_SURFACE_CAN_CONVERT_TO_DIB) != 0)
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+ {
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+ /* This is a DDB, and we're being asked to use it as a source for
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+ * something that we couldn't support natively. So turn it into
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+ * a DIB, so that we have an equivalent image surface, as long
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+ * as we're allowed to via flags.
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+ */
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+ _cairo_win32_convert_ddb_to_dib (surface);
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+ }
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if (surface->image) {
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*image_out = (cairo_image_surface_t *)surface->image;
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@@ -2133,3 +2194,61 @@
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free(rd);
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fflush (stderr);
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}
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+
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+/**
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+ * cairo_win32_surface_set_can_convert_to_dib
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+ * @surface: a #cairo_surface_t
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+ * @can_convert: a #cairo_bool_t indicating whether this surface can
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+ * be coverted to a DIB if necessary
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+ *
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+ * A DDB surface with this flag set can be converted to a DIB if it's
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+ * used as a source in a way that GDI can't natively handle; for
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+ * example, drawing a RGB24 DDB onto an ARGB32 DIB. Doing this
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+ * conversion results in a significant speed optimization, because we
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+ * can call on pixman to perform the operation natively, instead of
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+ * reading the data from the DC each time.
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+ *
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+ * Return value: %CAIRO_STATUS_SUCCESS if the flag was successfully
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+ * changed, or an error otherwise.
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+ *
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+ */
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+cairo_status_t
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+cairo_win32_surface_set_can_convert_to_dib (cairo_surface_t *asurface, cairo_bool_t can_convert)
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+{
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+ cairo_win32_surface_t *surface = (cairo_win32_surface_t*) asurface;
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+ if (surface->base.type != CAIRO_SURFACE_TYPE_WIN32)
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+ return CAIRO_STATUS_SURFACE_TYPE_MISMATCH;
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+
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+ if (surface->bitmap) {
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+ if (can_convert)
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+ surface->flags |= CAIRO_WIN32_SURFACE_CAN_CONVERT_TO_DIB;
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+ else
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+ surface->flags &= ~CAIRO_WIN32_SURFACE_CAN_CONVERT_TO_DIB;
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+ }
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+
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+ return CAIRO_STATUS_SUCCESS;
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+}
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+
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+/**
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+ * cairo_win32_surface_get_can_convert_to_dib
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+ * @surface: a #cairo_surface_t
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+ * @can_convert: a #cairo_bool_t* that receives the return value
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+ *
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+ * Returns the value of the flag indicating whether the surface can be
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+ * converted to a DIB if necessary, as set by
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+ * cairo_win32_surface_set_can_convert_to_dib.
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+ *
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+ * Return value: %CAIRO_STATUS_SUCCESS if the flag was successfully
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+ * retreived, or an error otherwise.
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+ *
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+ */
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+cairo_status_t
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+cairo_win32_surface_get_can_convert_to_dib (cairo_surface_t *asurface, cairo_bool_t *can_convert)
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+{
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+ cairo_win32_surface_t *surface = (cairo_win32_surface_t*) asurface;
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+ if (surface->base.type != CAIRO_SURFACE_TYPE_WIN32)
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+ return CAIRO_STATUS_SURFACE_TYPE_MISMATCH;
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+
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+ *can_convert = ((surface->flags & CAIRO_WIN32_SURFACE_CAN_CONVERT_TO_DIB) != 0);
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+ return CAIRO_STATUS_SUCCESS;
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+}
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diff --git a/gfx/cairo/cairo/src/cairo-win32.h b/gfx/cairo/cairo/src/cairo-win32.h
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--- a/gfx/cairo/cairo/src/cairo-win32.h
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+++ b/gfx/cairo/cairo/src/cairo-win32.h
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@@ -68,6 +68,12 @@ cairo_win32_surface_get_dc (cairo_surface_t *surface);
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cairo_public cairo_surface_t *
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cairo_win32_surface_get_image (cairo_surface_t *surface);
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+cairo_public cairo_status_t
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+cairo_win32_surface_set_can_convert_to_dib (cairo_surface_t *surface, cairo_bool_t can_convert);
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+
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+cairo_public cairo_status_t
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+cairo_win32_surface_get_can_convert_to_dib (cairo_surface_t *surface, cairo_bool_t *can_convert);
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+
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#if CAIRO_HAS_WIN32_FONT
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