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authorVincent Sanders <vince@kyllikki.org>2016-05-05 22:28:51 +0100
committerVincent Sanders <vince@kyllikki.org>2016-05-15 13:44:34 +0100
commitd21447d096a320a08b3efb2b8768fad0dcdcfd64 (patch)
tree1a83814b7c9e94b2f13c473261f23dd3a17dee64 /gtk/bitmap.c
parent2cbb337756d9af5bda4d594964d446439f602551 (diff)
downloadnetsurf-d21447d096a320a08b3efb2b8768fad0dcdcfd64.tar.gz
netsurf-d21447d096a320a08b3efb2b8768fad0dcdcfd64.tar.bz2
move frontends into sub directory
Diffstat (limited to 'gtk/bitmap.c')
-rw-r--r--gtk/bitmap.c540
1 files changed, 0 insertions, 540 deletions
diff --git a/gtk/bitmap.c b/gtk/bitmap.c
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--- a/gtk/bitmap.c
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-/*
- * Copyright 2004 James Bursa <bursa@users.sourceforge.net>
- *
- * This file is part of NetSurf, http://www.netsurf-browser.org/
- *
- * NetSurf is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * NetSurf is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-/**
- * \file
- * Generic bitmap handling (GDK / GTK+ implementation).
- *
- * This implements the interface given by desktop/bitmap.h using GdkPixbufs.
- */
-
-#include <assert.h>
-#include <stdbool.h>
-#include <string.h>
-#include <stdlib.h>
-#include <cairo.h>
-#include <gtk/gtk.h>
-
-#include "utils/utils.h"
-#include "utils/log.h"
-#include "content/content.h"
-#include "image/bitmap.h"
-#include "desktop/plotters.h"
-
-#include "gtk/scaffolding.h"
-#include "gtk/plotters.h"
-#include "gtk/bitmap.h"
-
-
-/**
- * Create a bitmap.
- *
- * \param width width of image in pixels
- * \param height width of image in pixels
- * \param state a flag word indicating the initial state
- * \return an opaque struct bitmap, or NULL on memory exhaustion
- */
-static void *bitmap_create(int width, int height, unsigned int state)
-{
- struct bitmap *gbitmap;
-
- gbitmap = calloc(1, sizeof(struct bitmap));
- if (gbitmap != NULL) {
- if ((state & BITMAP_OPAQUE) != 0) {
- gbitmap->surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
- } else {
- gbitmap->surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
- }
-
- if (cairo_surface_status(gbitmap->surface) != CAIRO_STATUS_SUCCESS) {
- cairo_surface_destroy(gbitmap->surface);
- free(gbitmap);
- gbitmap = NULL;
- }
- }
-
- return gbitmap;
-}
-
-
-/**
- * Sets whether a bitmap should be plotted opaque
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- * \param opaque whether the bitmap should be plotted opaque
- */
-static void bitmap_set_opaque(void *vbitmap, bool opaque)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- cairo_format_t fmt;
- cairo_surface_t *nsurface = NULL;
-
- assert(gbitmap);
-
- fmt = cairo_image_surface_get_format(gbitmap->surface);
- if (fmt == CAIRO_FORMAT_RGB24) {
- if (opaque == false) {
- /* opaque to transparent */
- nsurface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
- cairo_image_surface_get_width(gbitmap->surface),
- cairo_image_surface_get_height(gbitmap->surface));
-
- }
-
- } else {
- if (opaque == true) {
- /* transparent to opaque */
- nsurface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
- cairo_image_surface_get_width(gbitmap->surface),
- cairo_image_surface_get_height(gbitmap->surface));
-
- }
- }
-
- if (nsurface != NULL) {
- if (cairo_surface_status(nsurface) != CAIRO_STATUS_SUCCESS) {
- cairo_surface_destroy(nsurface);
- } else {
- memcpy(cairo_image_surface_get_data(nsurface),
- cairo_image_surface_get_data(gbitmap->surface),
- cairo_image_surface_get_stride(gbitmap->surface) * cairo_image_surface_get_height(gbitmap->surface));
- cairo_surface_destroy(gbitmap->surface);
- gbitmap->surface = nsurface;
-
- cairo_surface_mark_dirty(gbitmap->surface);
-
- }
-
- }
-}
-
-
-/**
- * Tests whether a bitmap has an opaque alpha channel
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- * \return whether the bitmap is opaque
- */
-static bool bitmap_test_opaque(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- unsigned char *pixels;
- int pcount;
- int ploop;
-
- assert(gbitmap);
-
- pixels = cairo_image_surface_get_data(gbitmap->surface);
-
- pcount = cairo_image_surface_get_stride(gbitmap->surface) *
- cairo_image_surface_get_height(gbitmap->surface);
-
- for (ploop = 3; ploop < pcount; ploop += 4) {
- if (pixels[ploop] != 0xff) {
- return false;
- }
- }
-
- return true;
-}
-
-
-/**
- * Gets whether a bitmap should be plotted opaque
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- */
-static bool bitmap_get_opaque(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- cairo_format_t fmt;
-
- assert(gbitmap);
-
- fmt = cairo_image_surface_get_format(gbitmap->surface);
- if (fmt == CAIRO_FORMAT_RGB24) {
- return true;
- }
-
- return false;
-}
-
-
-/**
- * Return a pointer to the pixel data in a bitmap.
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- * \return pointer to the pixel buffer
- *
- * The pixel data is packed as BITMAP_FORMAT, possibly with padding at the end
- * of rows. The width of a row in bytes is given by bitmap_get_rowstride().
- */
-static unsigned char *bitmap_get_buffer(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- int pixel_loop;
- int pixel_count;
- uint8_t *pixels;
- uint32_t t, r, g, b;
- cairo_format_t fmt;
-
- assert(gbitmap);
-
- cairo_surface_flush(gbitmap->surface);
- pixels = cairo_image_surface_get_data(gbitmap->surface);
-
- if (!gbitmap->converted)
- return pixels;
-
- fmt = cairo_image_surface_get_format(gbitmap->surface);
- pixel_count = cairo_image_surface_get_width(gbitmap->surface) *
- cairo_image_surface_get_height(gbitmap->surface);
-
- if (fmt == CAIRO_FORMAT_RGB24) {
- /* Opaque image */
- for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
- /* Cairo surface is ARGB, written in native endian */
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
- b = pixels[4 * pixel_loop + 0];
- g = pixels[4 * pixel_loop + 1];
- r = pixels[4 * pixel_loop + 2];
- t = pixels[4 * pixel_loop + 3];
-#else
- t = pixels[4 * pixel_loop + 0];
- r = pixels[4 * pixel_loop + 1];
- g = pixels[4 * pixel_loop + 2];
- b = pixels[4 * pixel_loop + 3];
-#endif
-
- /* Core bitmaps always have a component order of rgba,
- * regardless of system endianness */
- pixels[4 * pixel_loop + 0] = r;
- pixels[4 * pixel_loop + 1] = g;
- pixels[4 * pixel_loop + 2] = b;
- pixels[4 * pixel_loop + 3] = t;
- }
- } else {
- /* Alpha image: de-multiply alpha */
- for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
- b = pixels[4 * pixel_loop + 0];
- g = pixels[4 * pixel_loop + 1];
- r = pixels[4 * pixel_loop + 2];
- t = pixels[4 * pixel_loop + 3];
-#else
- t = pixels[4 * pixel_loop + 0];
- r = pixels[4 * pixel_loop + 1];
- g = pixels[4 * pixel_loop + 2];
- b = pixels[4 * pixel_loop + 3];
-#endif
-
- if (t != 0) {
- r = (r << 8) / t;
- g = (g << 8) / t;
- b = (b << 8) / t;
-
- r = (r > 255) ? 255 : r;
- g = (g > 255) ? 255 : g;
- b = (b > 255) ? 255 : b;
- } else {
- r = g = b = 0;
- }
-
- pixels[4 * pixel_loop + 0] = r;
- pixels[4 * pixel_loop + 1] = g;
- pixels[4 * pixel_loop + 2] = b;
- pixels[4 * pixel_loop + 3] = t;
- }
- }
-
- gbitmap->converted = false;
-
- return (unsigned char *) pixels;
-}
-
-
-/**
- * Find the width of a pixel row in bytes.
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- * \return width of a pixel row in the bitmap
- */
-static size_t bitmap_get_rowstride(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- assert(gbitmap);
-
- return cairo_image_surface_get_stride(gbitmap->surface);
-}
-
-
-/**
- * Find the bytes per pixel of a bitmap
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- * \return bytes per pixel
- */
-static size_t bitmap_get_bpp(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- assert(gbitmap);
-
- return 4;
-}
-
-
-
-/**
- * Free a bitmap.
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- */
-static void bitmap_destroy(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- assert(gbitmap);
-
- if (gbitmap->surface != NULL) {
- cairo_surface_destroy(gbitmap->surface);
- }
- if (gbitmap->scsurface != NULL) {
- cairo_surface_destroy(gbitmap->scsurface);
- }
- free(gbitmap);
-}
-
-
-/**
- * Save a bitmap in the platform's native format.
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- * \param path pathname for file
- * \param flags modify the behaviour of the save
- * \return true on success, false on error and error reported
- */
-static bool bitmap_save(void *vbitmap, const char *path, unsigned flags)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- assert(gbitmap);
-
- return false;
-}
-
-
-/**
- * The bitmap image has changed, so flush any persistant cache.
- *
- * \param vbitmap a bitmap, as returned by bitmap_create()
- */
-static void bitmap_modified(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- int pixel_loop;
- int pixel_count;
- uint8_t *pixels;
- uint32_t t, r, g, b;
- cairo_format_t fmt;
-
- assert(gbitmap);
-
- fmt = cairo_image_surface_get_format(gbitmap->surface);
-
- pixel_count = cairo_image_surface_get_width(gbitmap->surface) *
- cairo_image_surface_get_height(gbitmap->surface);
- pixels = cairo_image_surface_get_data(gbitmap->surface);
-
- if (gbitmap->converted) {
- cairo_surface_mark_dirty(gbitmap->surface);
- return;
- }
-
- if (fmt == CAIRO_FORMAT_RGB24) {
- /* Opaque image */
- for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
- /* Core bitmaps always have a component order of rgba,
- * regardless of system endianness */
- r = pixels[4 * pixel_loop + 0];
- g = pixels[4 * pixel_loop + 1];
- b = pixels[4 * pixel_loop + 2];
- t = pixels[4 * pixel_loop + 3];
-
- /* Cairo surface is ARGB, written in native endian */
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
- pixels[4 * pixel_loop + 0] = b;
- pixels[4 * pixel_loop + 1] = g;
- pixels[4 * pixel_loop + 2] = r;
- pixels[4 * pixel_loop + 3] = t;
-#else
- pixels[4 * pixel_loop + 0] = t;
- pixels[4 * pixel_loop + 1] = r;
- pixels[4 * pixel_loop + 2] = g;
- pixels[4 * pixel_loop + 3] = b;
-#endif
- }
- } else {
- /* Alpha image: pre-multiply alpha */
- for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
- r = pixels[4 * pixel_loop + 0];
- g = pixels[4 * pixel_loop + 1];
- b = pixels[4 * pixel_loop + 2];
- t = pixels[4 * pixel_loop + 3];
-
- if (t != 0) {
- r = ((r * (t + 1)) >> 8) & 0xff;
- g = ((g * (t + 1)) >> 8) & 0xff;
- b = ((b * (t + 1)) >> 8) & 0xff;
- } else {
- r = g = b = 0;
- }
-
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
- pixels[4 * pixel_loop + 0] = b;
- pixels[4 * pixel_loop + 1] = g;
- pixels[4 * pixel_loop + 2] = r;
- pixels[4 * pixel_loop + 3] = t;
-#else
- pixels[4 * pixel_loop + 0] = t;
- pixels[4 * pixel_loop + 1] = r;
- pixels[4 * pixel_loop + 2] = g;
- pixels[4 * pixel_loop + 3] = b;
-#endif
- }
- }
-
- cairo_surface_mark_dirty(gbitmap->surface);
-
- gbitmap->converted = true;
-}
-
-/* exported interface documented in gtk/bitmap.h */
-int nsgtk_bitmap_get_width(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- assert(gbitmap);
-
- return cairo_image_surface_get_width(gbitmap->surface);
-}
-
-/* exported interface documented in gtk/bitmap.h */
-int nsgtk_bitmap_get_height(void *vbitmap)
-{
- struct bitmap *gbitmap = (struct bitmap *)vbitmap;
- assert(gbitmap);
-
- return cairo_image_surface_get_height(gbitmap->surface);
-}
-
-/**
- * Render content into a bitmap.
- *
- * \param bitmap The bitmap to draw to
- * \param content The content to render
- * \return true on success and bitmap updated else false
- */
-static nserror
-bitmap_render(struct bitmap *bitmap, struct hlcache_handle *content)
-{
- cairo_surface_t *dsurface = bitmap->surface;
- cairo_surface_t *surface;
- cairo_t *old_cr;
- gint dwidth, dheight;
- int cwidth, cheight;
- struct redraw_context ctx = {
- .interactive = false,
- .background_images = true,
- .plot = &nsgtk_plotters
- };
-
- assert(content);
- assert(bitmap);
-
- dwidth = cairo_image_surface_get_width(dsurface);
- dheight = cairo_image_surface_get_height(dsurface);
-
- /* Calculate size of buffer to render the content into */
- /* Get the width from the content width, unless it exceeds 1024,
- * in which case we use 1024. This means we never create excessively
- * large render buffers for huge contents, which would eat memory and
- * cripple performance.
- */
- cwidth = min(max(content_get_width(content), dwidth), 1024);
-
- /* The height is set in proportion with the width, according to the
- * aspect ratio of the required thumbnail. */
- cheight = ((cwidth * dheight) + (dwidth / 2)) / dwidth;
-
- /* Create surface to render into */
- surface = cairo_surface_create_similar(dsurface, CAIRO_CONTENT_COLOR_ALPHA, cwidth, cheight);
-
- if (cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
- cairo_surface_destroy(surface);
- return false;
- }
-
- old_cr = current_cr;
- current_cr = cairo_create(surface);
-
- /* render the content */
- content_scaled_redraw(content, cwidth, cheight, &ctx);
-
- cairo_destroy(current_cr);
- current_cr = old_cr;
-
- cairo_t *cr = cairo_create(dsurface);
-
- /* Scale *before* setting the source surface (1) */
- cairo_scale (cr, (double)dwidth / cwidth, (double)dheight / cheight);
- cairo_set_source_surface (cr, surface, 0, 0);
-
- /* To avoid getting the edge pixels blended with 0 alpha,
- * which would occur with the default EXTEND_NONE. Use
- * EXTEND_PAD for 1.2 or newer (2)
- */
- cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REFLECT);
-
- /* Replace the destination with the source instead of overlaying */
- cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
-
- /* Do the actual drawing */
- cairo_paint(cr);
-
- cairo_destroy(cr);
-
- cairo_surface_destroy(surface);
-
- return NSERROR_OK;
-}
-
-
-static struct gui_bitmap_table bitmap_table = {
- .create = bitmap_create,
- .destroy = bitmap_destroy,
- .set_opaque = bitmap_set_opaque,
- .get_opaque = bitmap_get_opaque,
- .test_opaque = bitmap_test_opaque,
- .get_buffer = bitmap_get_buffer,
- .get_rowstride = bitmap_get_rowstride,
- .get_width = nsgtk_bitmap_get_width,
- .get_height = nsgtk_bitmap_get_height,
- .get_bpp = bitmap_get_bpp,
- .save = bitmap_save,
- .modified = bitmap_modified,
- .render = bitmap_render,
-};
-
-struct gui_bitmap_table *nsgtk_bitmap_table = &bitmap_table;