bitmap.c File Reference

GTK bitmap handling. More...

#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/errors.h"
#include "netsurf/content.h"
#include "netsurf/bitmap.h"
#include "netsurf/plotters.h"
#include "gtk/scaffolding.h"
#include "gtk/plotters.h"
#include "gtk/bitmap.h"

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Functions
static void *	bitmap_create (int width, int height, enum gui_bitmap_flags flags)
	Create a bitmap. More...
static void	bitmap_set_opaque (void *vbitmap, bool opaque)
	Sets whether a bitmap should be plotted opaque. More...
static bool	bitmap_get_opaque (void *vbitmap)
	Gets whether a bitmap should be plotted opaque. More...
static unsigned char *	bitmap_get_buffer (void *vbitmap)
	Return a pointer to the pixel data in a bitmap. More...
static size_t	bitmap_get_rowstride (void *vbitmap)
	Find the width of a pixel row in bytes. More...
static void	bitmap_destroy (void *vbitmap)
	Free a bitmap. More...
static void	bitmap_modified (void *vbitmap)
	The bitmap image has changed, so flush any persistant cache. More...
int	nsgtk_bitmap_get_width (void *vbitmap)
int	nsgtk_bitmap_get_height (void *vbitmap)
static nserror	bitmap_render (struct bitmap *bitmap, struct hlcache_handle *content)
	Render content into a bitmap. More...

Variables
static struct gui_bitmap_table	bitmap_table
struct gui_bitmap_table *	nsgtk_bitmap_table = &bitmap_table

Detailed Description

GTK bitmap handling.

This implements the bitmap interface using cairo image surfaces

Definition in file bitmap.c.

Function Documentation

bitmap_create()

static void * bitmap_create ( int  width, int  height, enum gui_bitmap_flags  flags  )

static

Create a bitmap.

Parameters

width	width of image in pixels
height	height of image in pixels
flags	flags for bitmap creation

Returns

an opaque struct bitmap, or NULL on memory exhaustion

Definition at line 52 of file bitmap.c.

References BITMAP_OPAQUE, height, bitmap::opaque, bitmap::surface, and width.

bitmap_destroy()

static void bitmap_destroy ( void *  vbitmap )

static

Free a bitmap.

Parameters

vbitmap

a bitmap, as returned by bitmap_create()

Definition at line 148 of file bitmap.c.

References bitmap::scsurface, and bitmap::surface.

bitmap_get_buffer()

static unsigned char * bitmap_get_buffer ( void *  vbitmap )

static

Return a pointer to the pixel data in a bitmap.

Parameters

vbitmap

a bitmap, as returned by bitmap_create()

Returns

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().

Definition at line 114 of file bitmap.c.

References bitmap::surface.

bitmap_get_opaque()

static bool bitmap_get_opaque ( void *  vbitmap )

static

Gets whether a bitmap should be plotted opaque.

Parameters

vbitmap

a bitmap, as returned by bitmap_create()

Definition at line 97 of file bitmap.c.

References bitmap::opaque.

bitmap_get_rowstride()

static size_t bitmap_get_rowstride ( void *  vbitmap )

static

Find the width of a pixel row in bytes.

Parameters

vbitmap

a bitmap, as returned by bitmap_create()

Returns

width of a pixel row in the bitmap

Definition at line 134 of file bitmap.c.

References bitmap::surface.

bitmap_modified()

static void bitmap_modified ( void *  vbitmap )

static

The bitmap image has changed, so flush any persistant cache.

Parameters

vbitmap

a bitmap, as returned by bitmap_create()

Definition at line 168 of file bitmap.c.

References bitmap::surface.

bitmap_render()

static nserror bitmap_render ( struct bitmap *  bitmap, struct hlcache_handle *  content  )

static

Render content into a bitmap.

Parameters

bitmap	The bitmap to draw to
content	The content to render

Returns

true on success and bitmap updated else false

Definition at line 203 of file bitmap.c.

References content_get_width(), content_scaled_redraw(), current_cr, redraw_context::interactive, max, min, NSERROR_OK, nsgtk_plotters, and bitmap::surface.

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bitmap_set_opaque()

static void bitmap_set_opaque ( void *  vbitmap, bool  opaque  )

static

Sets whether a bitmap should be plotted opaque.

Parameters

vbitmap	a bitmap, as returned by bitmap_create()
opaque	whether the bitmap should be plotted opaque

Definition at line 84 of file bitmap.c.

References bitmap::opaque.

nsgtk_bitmap_get_height()

int nsgtk_bitmap_get_height

(

void *

vbitmap

)

Definition at line 187 of file bitmap.c.

References bitmap::surface.

Referenced by nsgtk_print_plot_bitmap().

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nsgtk_bitmap_get_width()

int nsgtk_bitmap_get_width

(

void *

vbitmap

)

Definition at line 178 of file bitmap.c.

References bitmap::surface.

Referenced by nsgtk_print_plot_bitmap().

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Variable Documentation

bitmap_table

struct gui_bitmap_table bitmap_table

static

Initial value:

= {
        .create = bitmap_create,
        .destroy = bitmap_destroy,
        .set_opaque = bitmap_set_opaque,
        .get_opaque = bitmap_get_opaque,
        .get_buffer = bitmap_get_buffer,
        .get_rowstride = bitmap_get_rowstride,
        .get_width = nsgtk_bitmap_get_width,
        .get_height = nsgtk_bitmap_get_height,
        .modified = bitmap_modified,
        .render = bitmap_render,
}

Definition at line 281 of file bitmap.c.

nsgtk_bitmap_table

struct gui_bitmap_table* nsgtk_bitmap_table = &bitmap_table

Definition at line 294 of file bitmap.c.

Referenced by main().