mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-02 10:56:57 +03:00
c105738fa3
This changes the LOG macro to be varadic removing the need for all callsites to have double bracketing and allows for future improvement on how we use the logging macros. The callsites were changed with coccinelle and the changes checked by hand. Compile tested for several frontends but not all. A formatting annotation has also been added which allows the compiler to check the parameters and types passed to the logging.
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/*
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* Copyright 2011 Vincent Sanders <vince@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include "utils/log.h"
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#include "gtk/gdk.h"
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static void
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convert_alpha(guchar *dest_data,
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int dest_stride,
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guchar *src_data,
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int src_stride,
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int width,
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int height)
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{
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int x, y;
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for (y = 0; y < height; y++) {
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guint32 *src = (guint32 *) src_data;
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for (x = 0; x < width; x++) {
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guint alpha = src[x] >> 24;
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if (alpha == 0) {
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dest_data[x * 4 + 0] = 0;
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dest_data[x * 4 + 1] = 0;
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dest_data[x * 4 + 2] = 0;
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} else {
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dest_data[x * 4 + 0] = (((src[x] & 0xff0000) >> 16) * 255 + alpha / 2) / alpha;
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dest_data[x * 4 + 1] = (((src[x] & 0x00ff00) >> 8) * 255 + alpha / 2) / alpha;
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dest_data[x * 4 + 2] = (((src[x] & 0x0000ff) >> 0) * 255 + alpha / 2) / alpha;
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}
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dest_data[x * 4 + 3] = alpha;
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}
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src_data += src_stride;
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dest_data += dest_stride;
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}
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}
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GdkPixbuf *
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nsgdk_pixbuf_get_from_surface(cairo_surface_t *surface, int scwidth, int scheight)
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{
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int width, height; /* source width and height */
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cairo_surface_t *scsurface; /* scaled surface */
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cairo_t *cr; /* cairo context for scaled surface */
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GdkPixbuf *pixbuf; /* The result pixel buffer */
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/* create pixmap */
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pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, scwidth, scheight);
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if (pixbuf == NULL) {
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return NULL;
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}
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memset(gdk_pixbuf_get_pixels(pixbuf),
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0xff,
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gdk_pixbuf_get_rowstride(pixbuf) * scheight);
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/* scale cairo surface into new surface the target size */
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cairo_surface_flush(surface); /* ensure source surface is ready */
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/* get source surface dimensions */
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width = cairo_image_surface_get_width(surface);
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height = cairo_image_surface_get_height(surface);
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/* scaled surface always has an alpha chanel for ease */
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scsurface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, scwidth, scheight);
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if (cairo_surface_status(scsurface) != CAIRO_STATUS_SUCCESS) {
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cairo_surface_destroy(scsurface);
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g_object_unref(pixbuf);
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LOG("Surface creation failed");
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return NULL;
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}
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cr = cairo_create(scsurface);
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/* Scale *before* setting the source surface */
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cairo_scale(cr, (double)scwidth / width, (double)scheight / height);
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cairo_set_source_surface(cr, surface, 0, 0);
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/* To avoid getting the edge pixels blended with 0
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* alpha, which would occur with the default
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* EXTEND_NONE. Use EXTEND_PAD for 1.2 or newer
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*/
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cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REFLECT);
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/* Replace the destination with the source instead of overlaying */
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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/* Do the actual drawing */
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cairo_paint(cr);
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cairo_destroy(cr);
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/* copy data from surface into pixmap */
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convert_alpha(gdk_pixbuf_get_pixels(pixbuf),
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gdk_pixbuf_get_rowstride(pixbuf),
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cairo_image_surface_get_data(scsurface),
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cairo_image_surface_get_stride(scsurface),
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scwidth, scheight);
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cairo_surface_destroy(scsurface);
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return pixbuf;
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}
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