http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/libart-2.0/libart_lgpl/art_render.h

/* * art_render.h: Modular rendering architecture. * * Libart_LGPL - library of basic graphic primitives * Copyright (C) 2000 Raph Levien * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifndef __ART_RENDER_H__ #define __ART_RENDER_H__ #ifdef LIBART_COMPILATION #include "art_alphagamma.h" #else #include <libart_lgpl/art_alphagamma.h> #endif #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /* Render object */ #ifndef ART_MAX_DEPTH #define ART_MAX_DEPTH 16 #endif #if ART_MAX_DEPTH == 16 typedef art_u16 ArtPixMaxDepth; #define ART_PIX_MAX_FROM_8(x) ((x) | ((x) << 8)) #define ART_PIX_8_FROM_MAX(x) (((x) + 0x80 - (((x) + 0x80) >> 8)) >> 8) #else #if ART_MAX_DEPTH == 8 typedef art_u8 ArtPixMaxDepth; #define ART_PIX_MAX_FROM_8(x) (x) #define ART_PIX_8_FROM_MAX(x) (x) #else #error ART_MAX_DEPTH must be either 8 or 16 #endif #endif #define ART_MAX_CHAN 16 typedef struct _ArtRender ArtRender; typedef struct _ArtRenderCallback ArtRenderCallback; typedef struct _ArtRenderMaskRun ArtRenderMaskRun; typedef struct _ArtImageSource ArtImageSource; typedef struct _ArtMaskSource ArtMaskSource; typedef enum { ART_ALPHA_NONE = 0, ART_ALPHA_SEPARATE = 1, ART_ALPHA_PREMUL = 2 } ArtAlphaType; typedef enum { ART_COMPOSITE_NORMAL, ART_COMPOSITE_MULTIPLY, /* todo: more */ ART_COMPOSITE_CUSTOM } ArtCompositingMode; typedef enum { ART_IMAGE_SOURCE_CAN_CLEAR = 1, ART_IMAGE_SOURCE_CAN_COMPOSITE = 2 } ArtImageSourceFlags; struct _ArtRenderMaskRun { int x; int alpha; }; struct _ArtRenderCallback { void (*render) (ArtRenderCallback *self, ArtRender *render, art_u8 *dest, int y); void (*done) (ArtRenderCallback *self, ArtRender *render); }; struct _ArtImageSource { ArtRenderCallback super; void (*negotiate) (ArtImageSource *self, ArtRender *render, ArtImageSourceFlags *p_flags, int *p_buf_depth, ArtAlphaType *p_alpha_type); }; struct _ArtMaskSource { ArtRenderCallback super; int (*can_drive) (ArtMaskSource *self, ArtRender *render); /* For each mask source, ::prepare() is invoked if it is not a driver, or ::invoke_driver() if it is. */ void (*invoke_driver) (ArtMaskSource *self, ArtRender *render); void (*prepare) (ArtMaskSource *self, ArtRender *render, art_boolean first); }; struct _ArtRender { /* parameters of destination image */ int x0, y0; int x1, y1; art_u8 *pixels; int rowstride; int n_chan; int depth; ArtAlphaType alpha_type; art_boolean clear; ArtPixMaxDepth clear_color[ART_MAX_CHAN + 1]; art_u32 opacity; /* [0..0x10000] */ ArtCompositingMode compositing_mode; ArtAlphaGamma *alphagamma; art_u8 *alpha_buf; /* parameters of intermediate buffer */ int buf_depth; ArtAlphaType buf_alpha; art_u8 *image_buf; /* driving alpha scanline data */ /* A "run" is a contiguous sequence of x values with the same alpha value. */ int n_run; ArtRenderMaskRun *run; /* A "span" is a contiguous sequence of x values with non-zero alpha. */ int n_span; int *span_x; art_boolean need_span; }; ArtRender * art_render_new (int x0, int y0, int x1, int y1, art_u8 *pixels, int rowstride, int n_chan, int depth, ArtAlphaType alpha_type, ArtAlphaGamma *alphagamma); void art_render_invoke (ArtRender *render); void art_render_clear (ArtRender *render, const ArtPixMaxDepth *clear_color); void art_render_clear_rgb (ArtRender *render, art_u32 clear_rgb); void art_render_mask_solid (ArtRender *render, int opacity); void art_render_image_solid (ArtRender *render, ArtPixMaxDepth *color); /* The next two functions are for custom mask sources only. */ void art_render_add_mask_source (ArtRender *render, ArtMaskSource *mask_source); void art_render_invoke_callbacks (ArtRender *render, art_u8 *dest, int y); /* The following function is for custom image sources only. */ void art_render_add_image_source (ArtRender *render, ArtImageSource *image_source); #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* __ART_RENDER_H__ */