mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-24 23:39:51 +03:00
349 lines
8.2 KiB
C
349 lines
8.2 KiB
C
/*
|
|
* 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 <cairo.h>
|
|
#include <gtk/gtk.h>
|
|
|
|
#include "content/content.h"
|
|
#include "gtk/scaffolding.h"
|
|
#include "gtk/bitmap.h"
|
|
#include "image/bitmap.h"
|
|
#include "utils/log.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
|
|
*/
|
|
|
|
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
|
|
*/
|
|
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
|
|
*/
|
|
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()
|
|
*/
|
|
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().
|
|
*/
|
|
|
|
unsigned char *bitmap_get_buffer(void *vbitmap)
|
|
{
|
|
struct bitmap *gbitmap = (struct bitmap *)vbitmap;
|
|
assert(gbitmap);
|
|
|
|
cairo_surface_flush(gbitmap->surface);
|
|
|
|
return cairo_image_surface_get_data(gbitmap->surface);
|
|
}
|
|
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
|
|
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
|
|
*/
|
|
|
|
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()
|
|
*/
|
|
|
|
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
|
|
*/
|
|
|
|
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 bitmap a bitmap, as returned by bitmap_create()
|
|
*/
|
|
void bitmap_modified(void *vbitmap) {
|
|
struct bitmap *gbitmap = (struct bitmap *)vbitmap;
|
|
int pixel_loop;
|
|
int pixel_count;
|
|
uint32_t *pixels;
|
|
uint32_t pixel;
|
|
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 = (uint32_t *)cairo_image_surface_get_data(gbitmap->surface);
|
|
|
|
if (fmt == CAIRO_FORMAT_RGB24) {
|
|
for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
|
|
pixel = pixels[pixel_loop];
|
|
pixels[pixel_loop] = (pixel & 0xff00ff00) |
|
|
((pixel & 0xff) << 16) |
|
|
((pixel & 0xff0000) >> 16);
|
|
}
|
|
} else {
|
|
uint8_t t, r, g, b;
|
|
for (pixel_loop=0; pixel_loop < pixel_count; pixel_loop++) {
|
|
pixel = pixels[pixel_loop];
|
|
t = (pixel & 0xff000000) >> 24;
|
|
if (t == 0) {
|
|
pixels[pixel_loop] = 0;
|
|
} else {
|
|
r = (pixel & 0xff0000) >> 16;
|
|
g = (pixel & 0xff00) >> 8;
|
|
b = pixel & 0xff;
|
|
|
|
pixels[pixel_loop] = (t << 24) |
|
|
((r * t) >> 8) |
|
|
((g * t) >> 8) << 8 |
|
|
((b * t) >> 8) << 16;
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
cairo_surface_mark_dirty(gbitmap->surface);
|
|
|
|
gbitmap->converted = true;
|
|
}
|
|
|
|
|
|
/**
|
|
* The bitmap image can be suspended.
|
|
*
|
|
* \param bitmap a bitmap, as returned by bitmap_create()
|
|
* \param private_word a private word to be returned later
|
|
* \param invalidate the function to be called upon suspension
|
|
*/
|
|
void bitmap_set_suspendable(void *vbitmap, void *private_word,
|
|
void (*invalidate)(void *vbitmap, void *private_word)) {
|
|
}
|
|
|
|
int bitmap_get_width(void *vbitmap){
|
|
struct bitmap *gbitmap = (struct bitmap *)vbitmap;
|
|
assert(gbitmap);
|
|
|
|
return cairo_image_surface_get_width(gbitmap->surface);
|
|
}
|
|
|
|
int bitmap_get_height(void *vbitmap){
|
|
struct bitmap *gbitmap = (struct bitmap *)vbitmap;
|
|
assert(gbitmap);
|
|
|
|
return cairo_image_surface_get_height(gbitmap->surface);
|
|
}
|
|
|
|
|