framebuffer.c File Reference

#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <libnsfb.h>
#include <libnsfb_plot.h>
#include <libnsfb_event.h>
#include <libnsfb_cursor.h>
#include "utils/utils.h"
#include "utils/log.h"
#include "utils/utf8.h"
#include "netsurf/browser_window.h"
#include "netsurf/plotters.h"
#include "netsurf/bitmap.h"
#include "framebuffer/gui.h"
#include "framebuffer/fbtk.h"
#include "framebuffer/framebuffer.h"
#include "framebuffer/font.h"
#include "framebuffer/bitmap.h"

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Functions
static nserror	framebuffer_plot_clip (const struct redraw_context *ctx, const struct rect *clip)
	Sets a clip rectangle for subsequent plot operations. More...
static nserror	framebuffer_plot_arc (const struct redraw_context *ctx, const plot_style_t *style, int x, int y, int radius, int angle1, int angle2)
	Plots an arc. More...
static nserror	framebuffer_plot_disc (const struct redraw_context *ctx, const plot_style_t *style, int x, int y, int radius)
	Plots a circle. More...
static nserror	framebuffer_plot_line (const struct redraw_context *ctx, const plot_style_t *style, const struct rect *line)
	Plots a line. More...
static nserror	framebuffer_plot_rectangle (const struct redraw_context *ctx, const plot_style_t *style, const struct rect *nsrect)
	Plots a rectangle. More...
static nserror	framebuffer_plot_polygon (const struct redraw_context *ctx, const plot_style_t *style, const int *p, unsigned int n)
	Plot a polygon. More...
static nserror	framebuffer_plot_path (const struct redraw_context *ctx, const plot_style_t *pstyle, const float *p, unsigned int n, const float transform[6])
	Plots a path. More...
static nserror	framebuffer_plot_bitmap (const struct redraw_context *ctx, struct bitmap *bitmap, int x, int y, int width, int height, colour bg, bitmap_flags_t flags)
	Plot a bitmap. More...
static nserror	framebuffer_plot_text (const struct redraw_context *ctx, const struct plot_font_style *fstyle, int x, int y, const char *text, size_t length)
	Text plotting. More...
static bool	framebuffer_format_from_bpp (int bpp, enum nsfb_format_e *fmt)
nsfb_t *	framebuffer_initialise (const char *fename, int width, int height, int bpp)
bool	framebuffer_resize (nsfb_t *nsfb, int width, int height, int bpp)
void	framebuffer_finalise (void)
bool	framebuffer_set_cursor (struct fbtk_bitmap *bm)
nsfb_t *	framebuffer_set_surface (nsfb_t *new_nsfb)
	Set framebuffer surface to render into. More...

Variables
static nsfb_t *	nsfb
const struct plotter_table	fb_plotters
	framebuffer plot operation table More...

Function Documentation

framebuffer_finalise()

void framebuffer_finalise

(

void

)

Definition at line 638 of file framebuffer.c.

References nsfb.

Referenced by gui_quit().

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framebuffer_format_from_bpp()

static bool framebuffer_format_from_bpp ( int  bpp, enum nsfb_format_e *  fmt  )

static

Definition at line 539 of file framebuffer.c.

References NSLOG.

Referenced by framebuffer_initialise(), and framebuffer_resize().

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framebuffer_initialise()

nsfb_t * framebuffer_initialise	(	const char *	fename,
		int	width,
		int	height,
		int	bpp
	)

Definition at line 577 of file framebuffer.c.

References fename, framebuffer_format_from_bpp(), height, nsfb, NSLOG, and width.

Referenced by main().

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framebuffer_plot_arc()

static nserror framebuffer_plot_arc ( const struct redraw_context *  ctx, const plot_style_t *  style, int  x, int  y, int  radius, int  angle1, int  angle2  )

static

Plots an arc.

plot an arc segment around (x,y), anticlockwise from angle1 to angle2. Angles are measured anticlockwise from horizontal, in degrees.

Parameters

ctx	The current redraw context.
style	Style controlling the arc plot.
x	The x coordinate of the arc.
y	The y coordinate of the arc.
radius	The radius of the arc.
angle1	The start angle of the arc.
angle2	The finish angle of the arc.

Returns

NSERROR_OK on success else error code.

Definition at line 89 of file framebuffer.c.

References plot_style_s::fill_colour, NSERROR_INVALID, NSERROR_OK, and nsfb.

framebuffer_plot_bitmap()

static nserror framebuffer_plot_bitmap ( const struct redraw_context *  ctx, struct bitmap *  bitmap, int  x, int  y, int  width, int  height, colour  bg, bitmap_flags_t  flags  )

static

Plot a bitmap.

Tiled plot of a bitmap image. (x,y) gives the top left coordinate of an explicitly placed tile. From this tile the image can repeat in all four directions – up, down, left and right – to the extents given by the current clip rectangle.

The bitmap_flags say whether to tile in the x and y directions. If not tiling in x or y directions, the single image is plotted. The width and height give the dimensions the image is to be scaled to.

Parameters

ctx	The current redraw context.
bitmap	The bitmap to plot
x	The x coordinate to plot the bitmap
y	The y coordiante to plot the bitmap
width	The width of area to plot the bitmap into
height	The height of area to plot the bitmap into
bg	the background colour to alpha blend into
flags	the flags controlling the type of plot operation

Returns

NSERROR_OK on success else error code.

TODO: Currently using top left pixel. Maybe centre pixel or average value would be better.

Definition at line 304 of file framebuffer.c.

References BITMAPF_REPEAT_X, BITMAPF_REPEAT_Y, framebuffer_bitmap_get_opaque(), height, NSERROR_INVALID, NSERROR_OK, nsfb, and width.

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framebuffer_plot_clip()

static nserror framebuffer_plot_clip ( const struct redraw_context *  ctx, const struct rect *  clip  )

static

Sets a clip rectangle for subsequent plot operations.

Parameters

ctx	The current redraw context.
clip	The rectangle to limit all subsequent plot operations within.

Returns

NSERROR_OK on success else error code.

Definition at line 57 of file framebuffer.c.

References clip(), NSERROR_INVALID, NSERROR_OK, and nsfb.

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framebuffer_plot_disc()

static nserror framebuffer_plot_disc ( const struct redraw_context *  ctx, const plot_style_t *  style, int  x, int  y, int  radius  )

static

Plots a circle.

Plot a circle centered on (x,y), which is optionally filled.

Parameters

ctx	The current redraw context.
style	Style controlling the circle plot.
x	x coordinate of circle centre.
y	y coordinate of circle centre.
radius	circle radius.

Returns

NSERROR_OK on success else error code.

Definition at line 113 of file framebuffer.c.

References plot_style_s::fill_colour, plot_style_s::fill_type, NSERROR_OK, nsfb, PLOT_OP_TYPE_NONE, plot_style_s::stroke_colour, and plot_style_s::stroke_type.

framebuffer_plot_line()

static nserror framebuffer_plot_line ( const struct redraw_context *  ctx, const plot_style_t *  style, const struct rect *  line  )

static

Plots a line.

plot a line from (x0,y0) to (x1,y1). Coordinates are at centre of line width/thickness.

Parameters

ctx	The current redraw context.
style	Style controlling the line plot.
line	A rectangle defining the line to be drawn

Returns

NSERROR_OK on success else error code.

Definition at line 146 of file framebuffer.c.

References line(), NSERROR_OK, nsfb, PLOT_OP_TYPE_DASH, PLOT_OP_TYPE_DOT, PLOT_OP_TYPE_NONE, plot_style_fixed_to_int, plot_style_s::stroke_colour, plot_style_s::stroke_type, plot_style_s::stroke_width, rect::x0, rect::x1, rect::y0, and rect::y1.

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framebuffer_plot_path()

static nserror framebuffer_plot_path ( const struct redraw_context *  ctx, const plot_style_t *  pstyle, const float *  p, unsigned int  n, const float  transform[6]  )

static

Plots a path.

Path plot consisting of cubic Bezier curves. Line and fill colour is controlled by the plot style.

Parameters

ctx	The current redraw context.
pstyle	Style controlling the path plot.
p	elements of path
n	nunber of elements on path
transform	A transform to apply to the path.

Returns

NSERROR_OK on success else error code.

Definition at line 268 of file framebuffer.c.

References NSERROR_OK, and NSLOG.

framebuffer_plot_polygon()

static nserror framebuffer_plot_polygon ( const struct redraw_context *  ctx, const plot_style_t *  style, const int *  p, unsigned int  n  )

static

Plot a polygon.

Plots a filled polygon with straight lines between points. The lines around the edge of the ploygon are not plotted. The polygon is filled with the non-zero winding rule.

Parameters

ctx	The current redraw context.
style	Style controlling the polygon plot.
p	verticies of polygon
n	number of verticies.

Returns

NSERROR_OK on success else error code.

Definition at line 242 of file framebuffer.c.

References plot_style_s::fill_colour, NSERROR_INVALID, NSERROR_OK, and nsfb.

framebuffer_plot_rectangle()

static nserror framebuffer_plot_rectangle ( const struct redraw_context *  ctx, const plot_style_t *  style, const struct rect *  nsrect  )

static

Plots a rectangle.

The rectangle can be filled an outline or both controlled by the plot style The line can be solid, dotted or dashed. Top left corner at (x0,y0) and rectangle has given width and height.

Parameters

ctx	The current redraw context.
style	Style controlling the rectangle plot.
nsrect	A rectangle defining the line to be drawn

Returns

NSERROR_OK on success else error code.

Definition at line 193 of file framebuffer.c.

References plot_style_s::fill_colour, plot_style_s::fill_type, NSERROR_OK, nsfb, PLOT_OP_TYPE_DASH, PLOT_OP_TYPE_DOT, PLOT_OP_TYPE_NONE, plot_style_fixed_to_int, plot_style_s::stroke_colour, plot_style_s::stroke_type, plot_style_s::stroke_width, rect::x0, rect::x1, rect::y0, and rect::y1.

framebuffer_plot_text()

static nserror framebuffer_plot_text ( const struct redraw_context *  ctx, const struct plot_font_style *  fstyle, int  x, int  y, const char *  text, size_t  length  )

static

Text plotting.

Parameters

ctx	The current redraw context.
fstyle	plot style for this text
x	x coordinate
y	y coordinate
text	UTF-8 string to plot
length	length of string, in bytes

Returns

NSERROR_OK on success else error code.

Definition at line 478 of file framebuffer.c.

References codepoint_displayable, FB_FONT_HEIGHT, FB_FONT_PITCH, FB_FONT_WIDTH, fb_get_font_size(), fb_get_font_style(), fb_get_glyph(), plot_font_style::foreground, NSERROR_OK, nsfb, text(), utf8_next(), and utf8_to_ucs4().

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framebuffer_resize()

bool framebuffer_resize	(	nsfb_t *	nsfb,
		int	width,
		int	height,
		int	bpp
	)

Definition at line 619 of file framebuffer.c.

References framebuffer_format_from_bpp(), height, nsfb, NSLOG, and width.

Referenced by gui_resize().

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framebuffer_set_cursor()

bool framebuffer_set_cursor

(

struct fbtk_bitmap *

bm

)

Definition at line 644 of file framebuffer.c.

References fbtk_bitmap::height, fbtk_bitmap::hot_x, fbtk_bitmap::hot_y, nsfb, fbtk_bitmap::pixdata, and fbtk_bitmap::width.

Referenced by fb_url_move(), gui_window_set_pointer(), main(), and set_ptr_default_move().

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framebuffer_set_surface()

nsfb_t * framebuffer_set_surface

(

nsfb_t *

new_nsfb

)

Set framebuffer surface to render into.

Returns

return old surface

Definition at line 649 of file framebuffer.c.

References nsfb.

Referenced by bitmap_render().

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Variable Documentation

fb_plotters

const struct plotter_table fb_plotters

Initial value:

= {
        .clip = framebuffer_plot_clip,
        .arc = framebuffer_plot_arc,
        .disc = framebuffer_plot_disc,
        .line = framebuffer_plot_line,
        .rectangle = framebuffer_plot_rectangle,
        .polygon = framebuffer_plot_polygon,
        .path = framebuffer_plot_path,
        .bitmap = framebuffer_plot_bitmap,
        .text = framebuffer_plot_text,
        .option_knockout = true,
}

framebuffer plot operation table

Definition at line 525 of file framebuffer.c.

Referenced by bitmap_render(), fb_local_history_draw(), fb_redraw(), fb_redraw_text(), and fb_redraw_text_button().

nsfb

nsfb_t* nsfb

static

Definition at line 45 of file framebuffer.c.

Referenced by do_redraw(), fb_pan(), fb_redraw(), fb_redraw_bitmap(), fb_redraw_fill(), fb_redraw_text(), fb_redraw_window(), framebuffer_finalise(), framebuffer_initialise(), framebuffer_plot_arc(), framebuffer_plot_bitmap(), framebuffer_plot_clip(), framebuffer_plot_disc(), framebuffer_plot_line(), framebuffer_plot_polygon(), framebuffer_plot_rectangle(), framebuffer_plot_text(), framebuffer_resize(), framebuffer_set_cursor(), framebuffer_set_surface(), gui_resize(), and main().