Attachment 53328 Details for Bug 42739 – Fix A1 format win32 surfaces

[patch] Fix A1 format win32 surfaces

cairo-win32-monochrome-bitmaps.patch (text/plain), 5.06 KB, created by Alexander Larsson on 2011-11-09 05:24:20 UTC

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Creator: Alexander Larsson

Created: 2011-11-09 05:24:20 UTC

Size: 5.06 KB

patch

obsolete

>diff --git a/src/cairo-win32-surface.c b/src/cairo-win32-surface.c
>index 660aaba..8ebd185 100644
>--- a/src/cairo-win32-surface.c
>+++ b/src/cairo-win32-surface.c
>@@ -545,6 +545,79 @@ _cairo_win32_surface_get_subimage (cairo_win32_surface_t  *surface,
>     return CAIRO_STATUS_SUCCESS;
> }
> 
>+static const unsigned char mirror[256] = {
>+  0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
>+  0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
>+  0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
>+  0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
>+  0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
>+  0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
>+  0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
>+  0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
>+  0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
>+  0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
>+  0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
>+  0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
>+  0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
>+  0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
>+  0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
>+  0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
>+  0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
>+  0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
>+  0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
>+  0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
>+  0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
>+  0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
>+  0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
>+  0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
>+  0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
>+  0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
>+  0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
>+  0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
>+  0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
>+  0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
>+  0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
>+  0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
>+};
>+
>+static void
>+mirror_a1_bits (cairo_surface_t *image_surface)
>+{
>+    int w, h, stride, x, y;
>+    unsigned char *data;
>+
>+    h = cairo_image_surface_get_height (image_surface);
>+    stride = cairo_image_surface_get_stride (image_surface);
>+    data = cairo_image_surface_get_data (image_surface);
>+
>+    for (y = 0; y < h; y++) {
>+	for (x = 0; x < stride; x++) {
>+	    *data = mirror[*data];
>+	    data++;
>+	}
>+    }
>+}
>+
>+static cairo_bool_t
>+_cairo_win32_surface_is_gdi_format (cairo_surface_t *image_surface)
>+{
>+    return cairo_image_surface_get_format (image_surface) != CAIRO_FORMAT_A1;
>+}
>+
>+static void
>+_cairo_win32_surface_convert_from_gdi_format (cairo_surface_t *image_surface)
>+{
>+    if (cairo_image_surface_get_format (image_surface) == CAIRO_FORMAT_A1)
>+	mirror_a1_bits (image_surface);
>+}
>+
>+static void
>+_cairo_win32_surface_convert_to_gdi_format (cairo_surface_t *image_surface)
>+{
>+    if (cairo_image_surface_get_format (image_surface) == CAIRO_FORMAT_A1)
>+	mirror_a1_bits (image_surface);
>+}
>+
> static cairo_status_t
> _cairo_win32_surface_acquire_source_image (void                    *abstract_surface,
> 					   cairo_image_surface_t  **image_out,
>@@ -554,7 +627,7 @@ _cairo_win32_surface_acquire_source_image (void                    *abstract_sur
>     cairo_win32_surface_t *local;
>     cairo_status_t status;
> 
>-    if (surface->image) {
>+    if (surface->image && _cairo_win32_surface_is_gdi_format (surface->image)) {
> 	*image_out = (cairo_image_surface_t *)surface->image;
> 	*image_extra = NULL;
> 	return CAIRO_STATUS_SUCCESS;
>@@ -566,6 +639,8 @@ _cairo_win32_surface_acquire_source_image (void                    *abstract_sur
>     if (status)
> 	return status;
> 
>+    _cairo_win32_surface_convert_from_gdi_format (local->image);
>+
>     *image_out = (cairo_image_surface_t *)local->image;
>     *image_extra = local;
>     return CAIRO_STATUS_SUCCESS;
>@@ -593,7 +668,7 @@ _cairo_win32_surface_acquire_dest_image (void                    *abstract_surfa
>     cairo_win32_surface_t *local = NULL;
>     cairo_status_t status;
> 
>-    if (surface->image) {
>+    if (surface->image && _cairo_win32_surface_is_gdi_format (surface->image)) {
> 	GdiFlush();
> 
> 	*image_out = (cairo_image_surface_t *) surface->image;
>@@ -611,6 +686,8 @@ _cairo_win32_surface_acquire_dest_image (void                    *abstract_surfa
>     if (status)
> 	return status;
> 
>+    _cairo_win32_surface_convert_from_gdi_format (local->image);
>+
>     *image_out = (cairo_image_surface_t *) local->image;
>     *image_extra = local;
>     *image_rect = *interest_rect;
>@@ -630,6 +707,8 @@ _cairo_win32_surface_release_dest_image (void                    *abstract_surfa
>     if (!local)
> 	return;
> 
>+    _cairo_win32_surface_convert_from_gdi_format (local->image);
>+
>     if (!BitBlt (surface->dc,
> 		 image_rect->x, image_rect->y,
> 		 image_rect->width, image_rect->height,
>@@ -1313,7 +1392,7 @@ _cairo_win32_surface_composite (cairo_operator_t	op,
> 
> UNSUPPORTED:
>     /* Fall back to image surface directly, if this is a DIB surface */
>-    if (dst->image) {
>+    if (dst->image && _cairo_win32_surface_is_gdi_format (dst->image)) {
> 	GdiFlush();
> 
> 	return dst->image->backend->composite (op, pattern, mask_pattern,

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