bitmap.c File Reference

#include <sys/types.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include "netsurf/inttypes.h"
#include "utils/nsoption.h"
#include "utils/log.h"
#include "netsurf/bitmap.h"
#include "netsurf/mouse.h"
#include "atari/bitmap.h"
#include "atari/plot/plot.h"

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Functions
int	init_mfdb (int bpp, int w, int h, uint32_t flags, MFDB *out)
	setup an MFDB struct and allocate memory for it when it is needed. More...
static void *	atari_bitmap_create_ex (int w, int h, short bpp, int rowstride, enum gui_bitmap_flags flags, void *pixdata)
	Create a bitmap. More...
void *	atari_bitmap_create (int w, int h, enum gui_bitmap_flags flags)
	Create a bitmap. More...
static void	bitmap_modified (void *bitmap)
	The bitmap image has changed, so flush any persistant cache. More...
void *	atari_bitmap_realloc (int w, int h, short bpp, int rowstride, unsigned int state, void *bmp)
static unsigned char *	bitmap_get_buffer (void *bitmap)
	Return a pointer to the pixel data in a bitmap. More...
size_t	atari_bitmap_buffer_size (void *bitmap)
size_t	atari_bitmap_get_rowstride (void *bitmap)
	Find the width of a pixel row in bytes. More...
void	atari_bitmap_destroy (void *bitmap)
	Free a bitmap. More...
static void	bitmap_set_opaque (void *bitmap, bool opaque)
	Sets whether a bitmap should be plotted opaque. More...
bool	atari_bitmap_get_opaque (void *bitmap)
	Gets whether a bitmap should be plotted opaque. More...
int	atari_bitmap_get_width (void *bitmap)
	Get bitmap width. More...
int	atari_bitmap_get_height (void *bitmap)
	Get bitmap height. More...
bool	atari_bitmap_resize (struct bitmap *img, HermesHandle hermes_h, HermesFormat *fmt, int nw, int nh)
static nserror	bitmap_render (struct bitmap *bitmap, struct hlcache_handle *content)

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

Function Documentation

atari_bitmap_buffer_size()

size_t atari_bitmap_buffer_size

(

void *

bitmap

)

Definition at line 208 of file bitmap.c.

References bitmap(), bitmap::height, and bitmap::rowstride.

Referenced by snapshot_suspend().

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atari_bitmap_create()

void * atari_bitmap_create	(	int	w,
		int	h,
		enum gui_bitmap_flags	flags
	)

Create a bitmap.

Parameters

w	width of image in pixels
h	width of image in pixels
state	a flag word indicating the initial state

Returns

an opaque struct bitmap, or NULL on memory exhaustion

Definition at line 121 of file bitmap.c.

References atari_bitmap_create_ex(), and NS_BMP_DEFAULT_BPP.

Referenced by snapshot_create().

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atari_bitmap_create_ex()

static void * atari_bitmap_create_ex ( int  w, int  h, short  bpp, int  rowstride, enum gui_bitmap_flags  flags, void *  pixdata  )

static

Create a bitmap.

Parameters

w	width of image in pixels
h	height of image in pixels
bpp	number of BYTES per pixel
rowstride	linewidth in bytes
state	a flag word indicating the initial state
pixdata	NULL or an memory address to use as the bitmap pixdata

Returns

an opaque struct bitmap, or NULL on memory exhaustion

Definition at line 80 of file bitmap.c.

References bitmap(), BITMAP_OPAQUE, bitmap::bpp, bitmap::height, NSLOG, bitmap::opaque, bitmap::pixdata, bitmap::resized, bitmap::rowstride, and bitmap::width.

Referenced by atari_bitmap_create(), and atari_bitmap_resize().

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atari_bitmap_destroy()

void atari_bitmap_destroy

(

void *

bitmap

)

Free a bitmap.

Parameters

bitmap

a bitmap, as returned by bitmap_create()

Definition at line 231 of file bitmap.c.

References atari_bitmap_destroy(), bitmap(), bitmap::converted, bitmap::native, NSLOG, bitmap::pixdata, and bitmap::resized.

Referenced by atari_bitmap_destroy(), atari_bitmap_resize(), bitmap_convert_tc(), bitmap_modified(), and snapshot_destroy().

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atari_bitmap_get_height()

int atari_bitmap_get_height

(

void *

bitmap

)

Get bitmap height.

Parameters

bitmap

a bitmap, as returned by bitmap_create()

Definition at line 301 of file bitmap.c.

References bitmap(), bitmap::height, and NSLOG.

Referenced by atari_bitmap_resize(), bitmap_convert_tc(), and plot_bitmap().

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atari_bitmap_get_opaque()

bool atari_bitmap_get_opaque

(

void *

bitmap

)

Gets whether a bitmap should be plotted opaque.

Parameters

bitmap

a bitmap, as returned by bitmap_create()

Definition at line 273 of file bitmap.c.

References bitmap(), NSLOG, and bitmap::opaque.

Referenced by bitmap_convert_tc().

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atari_bitmap_get_rowstride()

size_t atari_bitmap_get_rowstride

(

void *

bitmap

)

Find the width of a pixel row in bytes.

Parameters

bitmap

a bitmap, as returned by bitmap_create()

Returns

width of a pixel row in the bitmap

Definition at line 218 of file bitmap.c.

References bitmap(), NSLOG, and bitmap::rowstride.

Referenced by ablend_bitmap(), ablend_pixel(), atari_bitmap_resize(), and snapshot_create().

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atari_bitmap_get_width()

int atari_bitmap_get_width

(

void *

bitmap

)

Get bitmap width.

Parameters

bitmap

a bitmap, as returned by bitmap_create()

Definition at line 287 of file bitmap.c.

References bitmap(), NSLOG, and bitmap::width.

Referenced by atari_bitmap_resize(), bitmap_convert_tc(), and plot_bitmap().

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atari_bitmap_realloc()

void * atari_bitmap_realloc	(	int	w,
		int	h,
		short	bpp,
		int	rowstride,
		unsigned int	state,
		void *	bmp
	)

Definition at line 149 of file bitmap.c.

References BITMAP_CLEAR, BITMAP_GROW, bitmap_modified(), bitmap::bpp, bitmap::height, bitmap::pixdata, bitmap::resized, bitmap::rowstride, and bitmap::width.

Referenced by snapshot_create(), and snapshot_suspend().

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atari_bitmap_resize()

bool atari_bitmap_resize	(	struct bitmap *	img,
		HermesHandle	hermes_h,
		HermesFormat *	fmt,
		int	nw,
		int	nh
	)

Definition at line 313 of file bitmap.c.

References atari_bitmap_create_ex(), atari_bitmap_destroy(), atari_bitmap_get_height(), atari_bitmap_get_rowstride(), atari_bitmap_get_width(), BITMAP_OPAQUE, bitmap::bpp, bitmap::height, bitmap::opaque, bitmap::pixdata, bitmap::resized, and bitmap::width.

Referenced by plot_bitmap().

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bitmap_get_buffer()

static unsigned char * bitmap_get_buffer ( void *  bitmap )

static

Return a pointer to the pixel data in a bitmap.

Parameters

bitmap

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 194 of file bitmap.c.

References bitmap(), NSLOG, and bitmap::pixdata.

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bitmap_modified()

static void bitmap_modified ( void *  bitmap )

static

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

Parameters

bitmap

a bitmap, as returned by bitmap_create()

Definition at line 131 of file bitmap.c.

References atari_bitmap_destroy(), bitmap(), bitmap::converted, bitmap::native, bitmap::pixdata, and bitmap::resized.

Referenced by atari_bitmap_realloc().

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bitmap_render()

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

static

Definition at line 373 of file bitmap.c.

References NSERROR_NOT_IMPLEMENTED.

bitmap_set_opaque()

static void bitmap_set_opaque ( void *  bitmap, bool  opaque  )

static

Sets whether a bitmap should be plotted opaque.

Parameters

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

Definition at line 257 of file bitmap.c.

References bitmap(), NSLOG, and bitmap::opaque.

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init_mfdb()

int init_mfdb	(	int	bpp,
		int	w,
		int	h,
		uint32_t	flags,
		MFDB *	out
	)

setup an MFDB struct and allocate memory for it when it is needed.

If bpp == 0, this function assumes that the MFDB shall point to the screen and will not allocate any memory (mfdb.fd_addr == 0).

Returns

0 when the memory allocation fails (out of memory), otherwise it returns the size of the mfdb.fd_addr as number of bytes.

Definition at line 41 of file bitmap.c.

References MFDB_FLAG_NOALLOC, MFDB_FLAG_STAND, MFDB_FLAG_ZEROMEM, MFDB_SIZE, and MFDB_STRIDE.

Referenced by plot_blit_mfdb(), snapshot_create_native_mfdb(), and window_place_caret().

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Variable Documentation

atari_bitmap_table

struct gui_bitmap_table* atari_bitmap_table = &bitmap_table

Definition at line 391 of file bitmap.c.

Referenced by main().

bitmap_table

struct gui_bitmap_table bitmap_table

static

Initial value:

= {
        .create = atari_bitmap_create,
        .destroy = atari_bitmap_destroy,
        .set_opaque = bitmap_set_opaque,
        .get_opaque = atari_bitmap_get_opaque,
        .get_buffer = bitmap_get_buffer,
        .get_rowstride = atari_bitmap_get_rowstride,
        .get_width = atari_bitmap_get_width,
        .get_height = atari_bitmap_get_height,
        .modified = bitmap_modified,
        .render = bitmap_render,
}

Definition at line 378 of file bitmap.c.