--- /dev/null
+#ifndef _EVAS_FILTER_H
+#define _EVAS_FILTER_H
+
+#include "evas_common_private.h"
+
+typedef struct _Evas_Filter_Context Evas_Filter_Context;
+typedef struct _Evas_Filter_Command Evas_Filter_Command;
+typedef struct _Evas_Filter_Program Evas_Filter_Program;
+typedef struct _Evas_Filter_Instruction Evas_Filter_Instruction;
+typedef struct _Evas_Filter_Buffer Evas_Filter_Buffer;
+typedef enum _Evas_Filter_Mode Evas_Filter_Mode;
+typedef enum _Evas_Filter_Blur_Type Evas_Filter_Blur_Type;
+typedef enum _Evas_Filter_Channel Evas_Filter_Channel;
+typedef enum _Evas_Filter_Displacement_Flags Evas_Filter_Displacement_Flags;
+typedef enum _Evas_Filter_Bump_Flags Evas_Filter_Bump_Flags;
+
+typedef Eina_Bool (* Evas_Filter_Apply_Func) (Evas_Filter_Command *cmd);
+typedef void (* Evas_Filter_Cb) (Evas_Filter_Context *ctx, void *data);
+
+#define EVAS_FILTER_BUFFER_RGBA EINA_FALSE
+#define EVAS_FILTER_BUFFER_ALPHA EINA_TRUE
+
+enum _Evas_Filter_Mode
+{
+ EVAS_FILTER_MODE_BLEND, /**< Blend with current context render_op */
+ EVAS_FILTER_MODE_BLUR, /**< @see Evas_Filter_Blur_Type */
+ EVAS_FILTER_MODE_CURVE, /**< Apply color curve */
+ EVAS_FILTER_MODE_DISPLACE, /**< Apply XY displacement based on RG mask */
+ EVAS_FILTER_MODE_MASK, /**< Apply Alpha or RGBA texture on image */
+ EVAS_FILTER_MODE_BUMP, /**< Apply bump mapping (light effect) */
+ EVAS_FILTER_MODE_LAST
+};
+
+enum _Evas_Filter_Blur_Type
+{
+ EVAS_FILTER_BLUR_GAUSSIAN = 0x0, // Gaussian or sine curve. O(nm)
+ EVAS_FILTER_BLUR_BOX = 0x1, // Optimizable. But, UGLY. O(n)
+ EVAS_FILTER_BLUR_MOTION = 0x2, // Not implemented
+ EVAS_FILTER_BLUR_LAST,
+ EVAS_FILTER_BLUR_DEFAULT = EVAS_FILTER_BLUR_GAUSSIAN
+};
+
+enum _Evas_Filter_Channel
+{
+ EVAS_FILTER_CHANNEL_ALPHA = 0,
+ EVAS_FILTER_CHANNEL_RED = 1,
+ EVAS_FILTER_CHANNEL_GREEN = 2,
+ EVAS_FILTER_CHANNEL_BLUE = 3,
+ EVAS_FILTER_CHANNEL_RGB = 4
+};
+
+enum _Evas_Filter_Displacement_Flags
+{
+ EVAS_FILTER_DISPLACE_ALPHA = 0x0, /**< Displace based on Alpha values */
+ EVAS_FILTER_DISPLACE_X = 0x1, /**< X displacement */
+ EVAS_FILTER_DISPLACE_X_ALPHA = 0x1, /**< X displacement */
+ EVAS_FILTER_DISPLACE_Y = 0x2, /**< Y displacement */
+ EVAS_FILTER_DISPLACE_Y_ALPHA = 0x2, /**< Y displacement */
+ EVAS_FILTER_DISPLACE_RG = 0x4, /**< Displace based on R(G) values */
+ EVAS_FILTER_DISPLACE_XY_ALPHA = 0x3, /**< XY displacement based on alpha */
+ EVAS_FILTER_DISPLACE_XY_RG = 0x7, /**< Full 2-D displacement based on RG values */
+ EVAS_FILTER_DISPLACE_NEAREST = 0x0, /**< Interpolate between pixels (linear interpolation) */
+ EVAS_FILTER_DISPLACE_LINEAR = 0x8, /**< Interpolate between pixels (linear interpolation) */
+ EVAS_FILTER_DISPLACE_BLACK = 0x0, /**< Use black (or transparent) when going out of bounds) */
+ EVAS_FILTER_DISPLACE_STRETCH = 0x8, /**< Stretch border pixels when going out of bounds */
+ //EVAS_FILTER_DISPLACE_WRAP = 0x10, /**< Wrap around input when displacement goes out of bounds */
+ EVAS_FILTER_DISPLACE_BITMASK = 0xf
+};
+
+enum _Evas_Filter_Bump_Flags
+{
+ EVAS_FILTER_BUMP_NORMAL = 0x0,
+ EVAS_FILTER_BUMP_COMPENSATE = 0x1 /**< Compensate for darkening (diffuse light) or brightening (specular light) of zero gradient surfaces */
+};
+
+/* Parser stuff (high level API) */
+Evas_Filter_Program *evas_filter_program_new(const char *name);
+Eina_Bool evas_filter_program_parse(Evas_Filter_Program *pgm, const char *str);
+void evas_filter_program_del(Evas_Filter_Program *pgm);
+Eina_Bool evas_filter_context_program_use(Evas_Filter_Context *ctx, Evas_Object *eo_obj, Evas_Filter_Program *pgm);
+Eina_Bool evas_filter_program_padding_get(Evas_Filter_Program *pgm, int *l, int *r, int *t, int *b);
+void evas_filter_program_proxy_source_bind(Evas_Filter_Program *pgm, const char *name, Evas_Object *object);
+Evas_Object *evas_filter_program_proxy_source_get(Evas_Filter_Program *pgm, const char *name);
+void evas_filter_context_proxy_render_all(Evas_Filter_Context *ctx, Eo *eo_obj, Eina_Bool do_async);
+
+/* Filter context (low level) */
+Evas_Filter_Context *evas_filter_context_new(Evas_Public_Data *evas);
+void evas_filter_context_destroy(Evas_Filter_Context *ctx);
+void evas_filter_context_post_run_callback_set(Evas_Filter_Context *ctx, Evas_Filter_Cb cb, void *data);
+#define evas_filter_context_autodestroy(ctx) evas_filter_context_post_run_callback_set(ctx, ((Evas_Filter_Cb) evas_filter_context_destroy), ctx)
+
+int evas_filter_buffer_empty_new(Evas_Filter_Context *ctx, Eina_Bool alpha_only);
+int evas_filter_buffer_image_new(Evas_Filter_Context *ctx, RGBA_Image *image);
+int evas_filter_buffer_data_new(Evas_Filter_Context *ctx, void *data, int w, int h, Eina_Bool alpha_only);
+#define evas_filter_buffer_alloc_new(ctx, w, h, a) evas_filter_buffer_data_new(ctx, NULL, w, h, a)
+void *evas_filter_buffer_backing_get(Evas_Filter_Context *ctx, int bufid);
+Eina_Bool evas_filter_buffer_data_set(Evas_Filter_Context *ctx, int bufid, void *data, int w, int h, Eina_Bool alpha_only);
+
+Eina_Bool evas_filter_run(Evas_Filter_Context *ctx, Eina_Bool do_async);
+
+/**
+ * @brief Blend a source buffer into a destination buffer, allowing X,Y offsets, Alpha to RGBA conversion with color
+ * @param ctx Current filter chain
+ * @param draw_context Current Evas draw context. Current color is used when inbuf is ALPHA and outbuf is RGBA.
+ * @param inbuf Source buffer: ALPHA or RGBA
+ * @param outbuf Destination buffer: ALPHA or RGBA (note: must be RGBA if inbuf is RGBA)
+ * @param ox X offset in the destination buffer
+ * @param oy Y offset in the destination buffer
+ * @return Filter command ID or -1 in case of error
+ */
+int evas_filter_command_blend_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int outbuf, int ox, int oy);
+
+/**
+ * @brief Apply a blur effect on a buffer
+ * @param ctx Current filter chain
+ * @param draw_context Current Evas draw context. Current color is used when inbuf is ALPHA and outbuf is RGBA.
+ * @param inbuf Source buffer: ALPHA or RGBA
+ * @param outbuf Destination buffer: ALPHA or RGBA (note: must be RGBA if inbuf is RGBA)
+ * @param type Type of blur: BOX, GAUSSIAN or MOTION
+ * @param dx X radius of blur. Can be negative ONLY for MOTION blur
+ * @param dy Y radius of blur. Can be negative ONLY for MOTION blur
+ * @param ox X offset in the destination buffer
+ * @param oy Y offset in the destination buffer
+ * @return Filter command ID or -1 in case of error
+ */
+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);
+
+/**
+ * @brief Grow/Shrink an image, as defined in image processing (this is not a scale algorithm!)
+ * @param ctx Current filter chain
+ * @param draw_context Current Evas draw context. Current color is used when inbuf is ALPHA and outbuf is RGBA.
+ * @param inbuf Source buffer: ALPHA or RGBA
+ * @param outbuf Destination buffer: ALPHA or RGBA (note: must be RGBA if inbuf is RGBA)
+ * @param radius Number of pixels to grow by. If negative, shrink instead of grow
+ * @param smooth Use smooth blur and curve for grow (default: true)
+ * @return Filter command ID or -1 in case of error
+ */
+int evas_filter_command_grow_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int outbuf, int radius, Eina_Bool smooth);
+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);
+
+/**
+ * @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
+ * @param ctx Current filter chain
+ * @param draw_context Current Evas draw context (ignored)
+ * @param inbuf Input buffer (Alpha or RGBA)
+ * @param outbuf Output buffer (Alpha or RGBA), same size as inbuf
+ * @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).
+ * @param flags Alters how the map is interpreted, @see Evas_Filter_Displacement_Flags
+ * @param intensity Maximum offset possible, if the map's value is maximal at this point (ie. 0 or 255)
+ * @return Filter command ID or -1 in case of error
+ */
+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);
+
+/**
+ * @brief Apply a texture to a buffer
+ * @param ctx Current filter chain
+ * @param draw_context Current Evas draw context (ignored)
+ * @param inbuf Input buffer (Alpha or RGBA)
+ * @param maskbuf Texture buffer (Alpha or RGBA)
+ * @param outbuf Output buffer (Alpha or RGBA)
+ * @return Filter command ID or -1 in case of error
+ * @note For the moment, inbuf can only be ALPHA, and output must be RGBA if mask is RGBA as well
+ */
+int evas_filter_command_mask_add(Evas_Filter_Context *ctx, void *draw_context, int inbuf, int maskbuf, int outbuf);
+
+/**
+ * @brief Apply a relief effect based on a bump map (Z map)
+ * @param ctx Current filter chain
+ * @param draw_context Current Evas draw context (ignored)
+ * @param inbuf Input buffer (Alpha or RGBA)
+ * @param bumpbuf Bump map (Alpha only), same size as inbuf. By definition, lows are black (alpha 0) and highs are white (alpha 255).
+ * @param outbuf Output buffer (Alpha or RGBA), same size as inbuf
+ * @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.
+ * @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.
+ * @param depth Max depth in the bump map. Default value is 10.
+ * @param specular_factor Factor for the specular light effect (shininess). Ranges from 1.0 to 1000+ with logarithmic effects
+ * @param black Darkest color, defines the ambiant light
+ * @param color Light's normal color
+ * @param white Brightest color, used in the shininess effect
+ * @param flags Optional flags: compensation for darkening
+ * @return Filter command ID or -1 in case of error
+ */
+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);
+
+#endif
+
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