forked from enlightenment/efl
236 lines
14 KiB
C
236 lines
14 KiB
C
#ifndef _EVAS_FILTER_H
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#define _EVAS_FILTER_H
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#include "evas_common_private.h"
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typedef struct _Evas_Filter_Context Evas_Filter_Context;
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typedef struct _Evas_Filter_Command Evas_Filter_Command;
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typedef struct _Evas_Filter_Program Evas_Filter_Program;
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typedef struct _Evas_Filter_Instruction Evas_Filter_Instruction;
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typedef struct _Evas_Filter_Buffer Evas_Filter_Buffer;
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typedef enum _Evas_Filter_Mode Evas_Filter_Mode;
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typedef enum _Evas_Filter_Blur_Type Evas_Filter_Blur_Type;
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typedef enum _Evas_Filter_Channel Evas_Filter_Channel;
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typedef enum _Evas_Filter_Displacement_Flags Evas_Filter_Displacement_Flags;
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typedef enum _Evas_Filter_Bump_Flags Evas_Filter_Bump_Flags;
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typedef enum _Evas_Filter_Fill_Mode Evas_Filter_Fill_Mode;
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typedef enum _Evas_Filter_Transform_Flags Evas_Filter_Transform_Flags;
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typedef Eina_Bool (* Evas_Filter_Apply_Func) (Evas_Filter_Command *cmd);
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typedef void (* Evas_Filter_Cb) (Evas_Filter_Context *ctx, void *data);
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#define EVAS_FILTER_BUFFER_RGBA EINA_FALSE
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#define EVAS_FILTER_BUFFER_ALPHA EINA_TRUE
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enum _Evas_Filter_Mode
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{
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EVAS_FILTER_MODE_BLEND, /**< Blend with current context render_op */
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EVAS_FILTER_MODE_BLUR, /**< @see Evas_Filter_Blur_Type */
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EVAS_FILTER_MODE_CURVE, /**< Apply color curve */
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EVAS_FILTER_MODE_DISPLACE, /**< Apply XY displacement based on RG mask */
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EVAS_FILTER_MODE_FILL, /**< Fill a buffer with a solid color */
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EVAS_FILTER_MODE_MASK, /**< Apply Alpha or RGBA texture on image */
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EVAS_FILTER_MODE_BUMP, /**< Apply bump mapping (light effect) */
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EVAS_FILTER_MODE_TRANSFORM, /**< Apply a simple geometrical transformation */
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EVAS_FILTER_MODE_LAST
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};
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enum _Evas_Filter_Blur_Type
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{
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EVAS_FILTER_BLUR_GAUSSIAN = 0x0, // Gaussian or sine curve. O(nm)
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EVAS_FILTER_BLUR_BOX = 0x1, // Optimizable. But, UGLY. O(n)
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EVAS_FILTER_BLUR_MOTION = 0x2, // Not implemented
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EVAS_FILTER_BLUR_LAST,
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EVAS_FILTER_BLUR_DEFAULT = EVAS_FILTER_BLUR_GAUSSIAN
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};
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enum _Evas_Filter_Channel
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{
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EVAS_FILTER_CHANNEL_ALPHA = 0,
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EVAS_FILTER_CHANNEL_RED = 1,
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EVAS_FILTER_CHANNEL_GREEN = 2,
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EVAS_FILTER_CHANNEL_BLUE = 3,
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EVAS_FILTER_CHANNEL_RGB = 4
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};
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enum _Evas_Filter_Displacement_Flags
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{
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EVAS_FILTER_DISPLACE_NEAREST = 0x0, /**< Interpolate between pixels (linear interpolation) */
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EVAS_FILTER_DISPLACE_LINEAR = 0x1, /**< Interpolate between pixels (linear interpolation) */
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EVAS_FILTER_DISPLACE_BLACK = 0x0, /**< Use black (or transparent) when going out of bounds) */
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EVAS_FILTER_DISPLACE_STRETCH = 0x2, /**< Stretch border pixels when going out of bounds */
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EVAS_FILTER_DISPLACE_BITMASK = 0x3
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};
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enum _Evas_Filter_Bump_Flags
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{
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EVAS_FILTER_BUMP_NORMAL = 0x0,
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EVAS_FILTER_BUMP_COMPENSATE = 0x1 /**< Compensate for darkening (diffuse light) or brightening (specular light) of zero gradient surfaces */
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};
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enum _Evas_Filter_Fill_Mode
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{
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EVAS_FILTER_FILL_MODE_NONE = 0x0,
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EVAS_FILTER_FILL_MODE_STRETCH_X = 0x1,
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EVAS_FILTER_FILL_MODE_STRETCH_Y = 0x2,
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EVAS_FILTER_FILL_MODE_REPEAT_X = 0x4,
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EVAS_FILTER_FILL_MODE_REPEAT_Y = 0x8,
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EVAS_FILTER_FILL_MODE_REPEAT_X_STRETCH_Y = EVAS_FILTER_FILL_MODE_REPEAT_X | EVAS_FILTER_FILL_MODE_STRETCH_Y,
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EVAS_FILTER_FILL_MODE_REPEAT_Y_STRETCH_X = EVAS_FILTER_FILL_MODE_REPEAT_Y | EVAS_FILTER_FILL_MODE_STRETCH_X,
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EVAS_FILTER_FILL_MODE_REPEAT_XY = EVAS_FILTER_FILL_MODE_REPEAT_X | EVAS_FILTER_FILL_MODE_REPEAT_Y,
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EVAS_FILTER_FILL_MODE_STRETCH_XY = EVAS_FILTER_FILL_MODE_STRETCH_X | EVAS_FILTER_FILL_MODE_STRETCH_Y
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};
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enum _Evas_Filter_Transform_Flags
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{
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EVAS_FILTER_TRANSFORM_VFLIP = 1
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};
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/* Parser stuff (high level API) */
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Evas_Filter_Program *evas_filter_program_new(const char *name);
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Eina_Bool evas_filter_program_parse(Evas_Filter_Program *pgm, const char *str);
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void evas_filter_program_del(Evas_Filter_Program *pgm);
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Eina_Bool evas_filter_context_program_use(Evas_Filter_Context *ctx, Evas_Object *eo_obj, Evas_Filter_Program *pgm);
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Eina_Bool evas_filter_program_padding_get(Evas_Filter_Program *pgm, int *l, int *r, int *t, int *b);
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void evas_filter_program_proxy_source_bind(Evas_Filter_Program *pgm, const char *name, Evas_Object *object);
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Evas_Object *evas_filter_program_proxy_source_get(Evas_Filter_Program *pgm, const char *name);
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void evas_filter_context_proxy_render_all(Evas_Filter_Context *ctx, Eo *eo_obj, Eina_Bool do_async);
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/* Filter context (low level) */
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Evas_Filter_Context *evas_filter_context_new(Evas_Public_Data *evas);
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void evas_filter_context_destroy(Evas_Filter_Context *ctx);
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void evas_filter_context_post_run_callback_set(Evas_Filter_Context *ctx, Evas_Filter_Cb cb, void *data);
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#define evas_filter_context_autodestroy(ctx) evas_filter_context_post_run_callback_set(ctx, ((Evas_Filter_Cb) evas_filter_context_destroy), ctx)
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int evas_filter_buffer_empty_new(Evas_Filter_Context *ctx, Eina_Bool alpha_only);
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int evas_filter_buffer_image_new(Evas_Filter_Context *ctx, RGBA_Image *image);
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int evas_filter_buffer_data_new(Evas_Filter_Context *ctx, void *data, int w, int h, Eina_Bool alpha_only);
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#define evas_filter_buffer_alloc_new(ctx, w, h, a) evas_filter_buffer_data_new(ctx, NULL, w, h, a)
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void *evas_filter_buffer_backing_get(Evas_Filter_Context *ctx, int bufid);
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Eina_Bool evas_filter_buffer_data_set(Evas_Filter_Context *ctx, int bufid, void *data, int w, int h, Eina_Bool alpha_only);
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Eina_Bool evas_filter_run(Evas_Filter_Context *ctx, Eina_Bool do_async);
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/**
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* @brief Blend a source buffer into a destination buffer, allowing X,Y offsets, Alpha to RGBA conversion with color
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* @param ctx Current filter chain
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* @param draw_context Current Evas draw context. Current color is used when inbuf is ALPHA and outbuf is RGBA.
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* @param inbuf Source buffer: ALPHA or RGBA
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* @param outbuf Destination buffer: ALPHA or RGBA (note: must be RGBA if inbuf is RGBA)
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* @param ox X offset in the destination buffer
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* @param oy Y offset in the destination buffer
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* @param fillmode Specifies whether to repeat or stretch the input onto its destination, and on which axes
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* @return Filter command ID or -1 in case of error
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*/
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int evas_filter_command_blend_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int outbuf, int ox, int oy, Evas_Filter_Fill_Mode fillmode);
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/**
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* @brief Apply a blur effect on a buffer
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* @param ctx Current filter chain
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* @param draw_context Current Evas draw context. Current color is used when inbuf is ALPHA and outbuf is RGBA.
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* @param inbuf Source buffer: ALPHA or RGBA
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* @param outbuf Destination buffer: ALPHA or RGBA (note: must be RGBA if inbuf is RGBA)
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* @param type Type of blur: BOX, GAUSSIAN or MOTION
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* @param dx X radius of blur. Can be negative ONLY for MOTION blur
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* @param dy Y radius of blur. Can be negative ONLY for MOTION blur
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* @param ox X offset in the destination buffer
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* @param oy Y offset in the destination buffer
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* @return Filter command ID or -1 in case of error
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*/
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int evas_filter_command_blur_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int outbuf, Evas_Filter_Blur_Type type, int dx, int dy, int ox, int oy);
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/**
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* @brief Fill a buffer with the current color
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* @param ctx Current filter chain
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* @param draw_context Current Evas draw context. Current color is used when buf is RGBA, and clip is used to specify the fill area.
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* @param buf Buffer: ALPHA or RGBA
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* @return Filter command ID or -1 in case of error
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* @note The current draw context's render operation is ignored (always uses COPY mode).
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*/
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int evas_filter_command_fill_add(Evas_Filter_Context *ctx, void *draw_context, int buf);
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/**
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* @brief evas_filter_command_curve_add
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* @param ctx Current filter chain
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* @param draw_context Current Evas draw context. Current color is used when buf is RGBA, and clip is used to specify the fill area.
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* @param inbuf Input buffer, ALPHA or RGBA.
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* @param outbuf Output buffer, must have same colorspace as inbuf.
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* @param curve The data points to use, must contain 256 values.
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* @param channel Which channel to apply the curve (red, green, blue, alpha or RGB)
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* @return Filter command ID or -1 in case of error
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*/
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int evas_filter_command_curve_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int outbuf, DATA8 *curve /* 256 elements */, Evas_Filter_Channel channel);
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/**
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* @brief Grow/Shrink an image, as defined in image processing (this is not a scale algorithm!)
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* @param ctx Current filter chain
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* @param draw_context Current Evas draw context. Current color is used when inbuf is ALPHA and outbuf is RGBA.
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* @param inbuf Source buffer: ALPHA or RGBA
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* @param outbuf Destination buffer: ALPHA or RGBA (note: must be RGBA if inbuf is RGBA)
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* @param radius Number of pixels to grow by. If negative, shrink instead of grow
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* @param smooth Use smooth blur and curve for grow (default: true)
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* @return Filter command ID or -1 in case of error
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*/
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int evas_filter_command_grow_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int outbuf, int radius, Eina_Bool smooth);
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/**
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* @brief Apply a displacement map to a buffer. This will move pixels from the source to the destination based on pixel per pixel offset, as defined in the displacement map
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* @param ctx Current filter chain
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* @param draw_context Current Evas draw context (ignored)
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* @param inbuf Input buffer (Alpha or RGBA)
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* @param outbuf Output buffer (Alpha or RGBA), same size as inbuf
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* @param dispbuf Displacement map. Should be an RGBA buffer, where the Red and Green channels are the displacement maps for X and Y. Can be also ALPHA buffer, in which case only one dimension can be specified (X or Y).
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* @param flags Alters how the map is interpreted, @see Evas_Filter_Displacement_Flags
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* @param intensity Maximum offset possible, if the map's value is maximal at this point (ie. 0 or 255)
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* @param fillmode Specifies how to repeat and stretch the map to fit the target size
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* @return Filter command ID or -1 in case of error
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*/
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int evas_filter_command_displacement_map_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int outbuf, int dispbuf, Evas_Filter_Displacement_Flags flags, int intensity, Evas_Filter_Fill_Mode fillmode);
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/**
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* @brief Apply a texture to a buffer
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* @param ctx Current filter chain
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* @param draw_context Current Evas draw context (ignored)
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* @param inbuf Input buffer (Alpha or RGBA)
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* @param maskbuf Texture buffer (Alpha or RGBA)
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* @param outbuf Output buffer (Alpha or RGBA)
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* @param fillmode Specifies how to repeat and stretch the mask to fit the target size
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* @return Filter command ID or -1 in case of error
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* @note For the moment, inbuf can only be ALPHA, and output must be RGBA if mask is RGBA as well
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*/
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int evas_filter_command_mask_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int maskbuf, int outbuf, Evas_Filter_Fill_Mode fillmode);
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/**
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* @brief Apply a relief effect based on a bump map (Z map)
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* @param ctx Current filter chain
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* @param draw_context Current Evas draw context (ignored)
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* @param inbuf Input buffer (Alpha or RGBA)
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* @param bumpbuf Bump map (Alpha only), same size as inbuf. By definition, lows are black (alpha 0) and highs are white (alpha 255).
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* @param outbuf Output buffer (Alpha or RGBA), same size as inbuf
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* @param azimuth CCW angle in degrees from the X axis of the light direction. 0 is light from the right, 90 from the top, 180 from the left, 270 from the bottom. All values are valid.
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* @param elevation Angle in degrees between the XY plane and the light. Only values from 0 (light is perfectly horizontal) to 90 (light comes from the viewer herself) are acceptable.
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* @param depth Max depth in the bump map. Default value is 10.
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* @param specular_factor Factor for the specular light effect (shininess). Ranges from 1.0 to 1000+ with logarithmic effects
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* @param black Darkest color, defines the ambiant light
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* @param color Light's normal color
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* @param white Brightest color, used in the shininess effect
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* @param flags Optional flags: compensation for darkening
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* @param fillmode Specifies how to repeat and stretch the map to fit the target size
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* @return Filter command ID or -1 in case of error
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*/
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int evas_filter_command_bump_map_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int bumpbuf, int outbuf, float azimuth, float elevation, float depth, float specular_factor, DATA32 black, DATA32 color, DATA32 white, Evas_Filter_Bump_Flags flags, Evas_Filter_Fill_Mode fillmode);
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/**
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* @brief Apply a geometrical transformation to the buffer
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* @param ctx Current filter chain
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* @param draw_context Current Evas draw context (ignored)
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* @param inbuf Input buffer (Alpha or RGBA)
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* @param outbuf Output buffer (Alpha or RGBA), same size as inbuf
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* @param flags Specifies the operation to apply (eg. vflip)
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* @return Filter command ID or -1 in case of error
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*/
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int evas_filter_command_transform_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int outbuf, Evas_Filter_Transform_Flags flags);
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#endif
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