Typedefs
typedef enum _ps_composite	ps_composite
	Compositing operations for graphics context.
typedef enum _ps_filter	ps_filter
	Graphics quality for rendering an image.
typedef enum _ps_fill_rule	ps_fill_rule
	Fill rules for graphics.
Enumerations
enum	_ps_composite { COMPOSITE_CLEAR, COMPOSITE_SRC, COMPOSITE_SRC_OVER, COMPOSITE_SRC_IN, COMPOSITE_SRC_OUT, COMPOSITE_SRC_ATOP, COMPOSITE_DST, COMPOSITE_DST_OVER, COMPOSITE_DST_IN, COMPOSITE_DST_OUT, COMPOSITE_DST_ATOP, COMPOSITE_XOR, COMPOSITE_DARKEN, COMPOSITE_LIGHTEN, COMPOSITE_OVERLAY, COMPOSITE_SCREEN, COMPOSITE_MULTIPLY, COMPOSITE_PLUS, COMPOSITE_MINUS, COMPOSITE_EXCLUSION, COMPOSITE_DIFFERENCE, COMPOSITE_SOFTLIGHT, COMPOSITE_HARDLIGHT, COMPOSITE_BURN, COMPOSITE_DODGE, COMPOSITE_CONTRAST, COMPOSITE_INVERT, COMPOSITE_INVERT_BLEND, COMPOSITE_HUE, COMPOSITE_SATURATION, COMPOSITE_COLOR, COMPOSITE_LUMINOSITY, COMPOSITE_ERROR }
	Compositing operations for graphics context. More...
enum	_ps_filter { FILTER_NEAREST, FILTER_BILINEAR, FILTER_GAUSSIAN, FILTER_UNKNOWN }
	Graphics quality for rendering an image. More...
enum	_ps_fill_rule { FILL_RULE_WINDING, FILL_RULE_EVEN_ODD, FILL_RULE_ERROR }
	Fill rules for graphics. More...
Functions
PEXPORT ps_composite PICAPI	ps_set_composite_operator (ps_context *ctx, ps_composite composite)
	Set composites opertaions for graphics context.
PEXPORT ps_filter PICAPI	ps_set_filter (ps_context *ctx, ps_filter filter)
	Set interpolation filter for graphic context.
PEXPORT ps_fill_rule PICAPI	ps_set_fill_rule (ps_context *ctx, ps_fill_rule rule)
	Set fill rule for graphic context.
PEXPORT float PICAPI	ps_set_alpha (ps_context *ctx, float alpha)
	Set the opacity level for objects drawn in graphic context.
PEXPORT float PICAPI	ps_set_gamma (ps_context *ctx, float gamma)
	Set the gamma value for the graphic context.
PEXPORT void PICAPI	ps_set_antialias (ps_context *ctx, ps_bool antialias)
	Set whether the Anti-aliasing should be turn on.
PEXPORT float PICAPI	ps_set_blur (ps_context *ctx, float blur)
	Set the blur level for the graphic context.

Enumeration Type Documentation

enum _ps_composite

Compositing operations for graphics context.

Enumerator:

COMPOSITE_CLEAR	Clear operation.
COMPOSITE_SRC	Source operation.
COMPOSITE_SRC_OVER	Source over operation. (Default)
COMPOSITE_SRC_IN	Source in operation.
COMPOSITE_SRC_OUT	Source out operation.
COMPOSITE_SRC_ATOP	Source atop operation.
COMPOSITE_DST	Destination operation.
COMPOSITE_DST_OVER	Destination over operation.
COMPOSITE_DST_IN	Destination in operation.
COMPOSITE_DST_OUT	Destination out operation.
COMPOSITE_DST_ATOP	Destination atop operation.
COMPOSITE_XOR	Xor operation.
COMPOSITE_DARKEN	Source darker operation.
COMPOSITE_LIGHTEN	Source lighter operation.
COMPOSITE_OVERLAY	Overlay operation.
COMPOSITE_SCREEN	Screen operation.
COMPOSITE_MULTIPLY	Multiply operation.
COMPOSITE_PLUS	Plus operation.
COMPOSITE_MINUS	Minus operation.
COMPOSITE_EXCLUSION	Exclusion operation.
COMPOSITE_DIFFERENCE	Difference operation.
COMPOSITE_SOFTLIGHT	Softlight operation.
COMPOSITE_HARDLIGHT	Hardlight operation.
COMPOSITE_BURN	Burn operation.
COMPOSITE_DODGE	Dodge operation.
COMPOSITE_CONTRAST	Contrast operation.
COMPOSITE_INVERT	Invert operation.
COMPOSITE_INVERT_BLEND	Invert blend operation.
COMPOSITE_HUE	Hue operation.
COMPOSITE_SATURATION	Saturation operation.
COMPOSITE_COLOR	Color operation.
COMPOSITE_LUMINOSITY	Luminosity operation.
COMPOSITE_ERROR	Error value.

Definition at line 1536 of file picasso.h.

enum _ps_fill_rule

Fill rules for graphics.

Enumerator:

FILL_RULE_WINDING	Nonzero winding fill rule. (Default)
FILL_RULE_EVEN_ODD	Even-odd fill rule.
FILL_RULE_ERROR	Error value.

Definition at line 1662 of file picasso.h.

enum _ps_filter

Graphics quality for rendering an image.

Enumerator:

FILTER_NEAREST	No interpolation filter.
FILTER_BILINEAR	Bilinear interpolation filter. (Default)
FILTER_GAUSSIAN	Gaussian interpolation filter.
FILTER_UNKNOWN	Error value.

Definition at line 1624 of file picasso.h.

Function Documentation

float ps_set_alpha	(	ps_context *	ctx,
		float	alpha
	)

Set the opacity level for objects drawn in graphic context.

Parameters:

ctx	Pointer to an existing context object.
alpha	A value that specifies the opacity level from transparent to opaque(0 ~ 1). Default level is opaque (1).

Returns:: If the function succeeds, the return value is the old level. If the function fails, the return value is 0.

Note:: To get extended error information, call ps_last_status.

See also:: ps_set_gamma, ps_set_blur, ps_set_antialias

void ps_set_antialias	(	ps_context *	ctx,
		ps_bool	antialias
	)

Set whether the Anti-aliasing should be turn on.

Parameters:

ctx	Pointer to an existing context object.
antialias	Boolean value whether the anti-aliasing is turn on. (True default)

See also:: ps_set_alpha, ps_set_blur, ps_set_gamma

float ps_set_blur	(	ps_context *	ctx,
		float	blur
	)

Set the blur level for the graphic context.

Parameters:

ctx	Pointer to an existing context object.
blur	A value that specifies the blur level (0 ~ 1). Default value is none blur (0).

Returns:: If the function succeeds, the return value is the old level. If the function fails, the return value is 0.

Note:: To get extended error information, call ps_last_status.

See also:: ps_set_alpha, ps_set_gamma, ps_set_antialias

ps_composite ps_set_composite_operator	(	ps_context *	ctx,
		ps_composite	composite
	)

Set composites opertaions for graphics context.

Parameters:

ctx	Pointer to an existing context object.
composite	The Composite operation to be set.

Returns:: If the function succeeds, the return value is the old operation. If the function fails, the return value is COMPOSITE_ERROR.

Note:: To get extended error information, call ps_last_status.

See also:: ps_set_filter, ps_set_fill_rule

ps_fill_rule ps_set_fill_rule	(	ps_context *	ctx,
		ps_fill_rule	rule
	)

Set fill rule for graphic context.

Parameters:

ctx	Pointer to an existing context object.
rule	The fill rule to be set.

Returns:: If the function succeeds, the return value is the old rule. If the function fails, the return value is FILL_RULE_ERROR.

Note:: To get extended error information, call ps_last_status.

See also:: ps_set_composite_operator, ps_set_filter

ps_filter ps_set_filter	(	ps_context *	ctx,
		ps_filter	filter
	)

Set interpolation filter for graphic context.

Parameters:

ctx	Pointer to an existing context object.
filter	The interpolation filter to be set.

Returns:: If the function succeeds, the return value is the old filter. If the function fails, the return value is FILTER_UNKNOWN.

Note:: To get extended error information, call ps_last_status.

See also:: ps_set_composite_operator, ps_set_fill_rule

float ps_set_gamma	(	ps_context *	ctx,
		float	gamma
	)

Set the gamma value for the graphic context.

Parameters:

ctx	Pointer to an existing context object.
gamma	A value that specifies the gamma (0 ~ 3). Default value is 1.

Returns:: If the function succeeds, the return value is the old one. If the function fails, the return value is 0.

Note:: To get extended error information, call ps_last_status.

See also:: ps_set_alpha, ps_set_blur, ps_set_antialias

Typedefs

Enumerations

Functions

Enumeration Type Documentation

Function Documentation