?? gblblit.c
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#include "gblblit.h"/* blitting gray glyphs *//* generic macros */#define GRGB_PACK(r,g,b) ( ((GBlenderPixel)(r) << 16) | \ ((GBlenderPixel)(g) << 8) | \ (GBlenderPixel)(b) )#define GDST_STORE3(d,r,g,b) (d)[0] = (unsigned char)(r); \ (d)[1] = (unsigned char)(g); \ (d)[2] = (unsigned char)(b)/* */#define GRGB_TO_RGB565(r,g,b) ((unsigned short)( ((r << 8) & 0xF800) | \ ((g << 3) & 0x07E0) | \ ((b >> 3) & 0x001F) ) )#define GRGB565_TO_RGB24(p) ( ( ((p) << 8) & 0xF80000 ) | \ ( ((p) << 3) & 0x0700F8 ) | \ ( ((p) << 5) & 0x00FC00 ) | \ ( ((p) >> 1) & 0x000300 ) | \ ( ((p) >> 2) & 0x000007 ) )#define GRGB24_TO_RGB565(p) ( (unsigned short)( (((p) >> 8) & 0xF800 ) | \ (((p) >> 5) & 0x07E0 ) | \ (((p) >> 3) & 0x001F ) ) )/* */#define GRGB_TO_BGR565(r,g,b) GRGB_TO_RGB565(b,g,r)#define GBGR565_TO_RGB24(p) ( ( ((p) << 19) & 0xF80000 ) | \ ( ((p) << 12) & 0x070000 ) | \ ( ((p) << 5) & 0x00FC00 ) | \ ( ((p) >> 1) & 0x000300 ) | \ ( ((p) >> 8) & 0x0000F8 ) | \ ( ((p) >> 13) & 0x000007 ) )#define GRGB24_TO_BGR565(p) ( (unsigned short)( (((p) << 8) & 0xF800 ) | \ (((p) >> 5) & 0x07E0 ) | \ (((p) >> 19) & 0x001F ) ) )/* *//* Rgb32 blitting routines */#define GDST_TYPE rgb32#define GDST_INCR 4#define GDST_READ(d,p) (p) = *(GBlenderPixel*)(d) & 0xFFFFFF#define GDST_COPY(d) *(GBlenderPixel*)(d) = color#define GDST_STOREP(d,cells,a) *(GBlenderPixel*)(d) = (cells)[(a)]#define GDST_STOREB(d,cells,a) \ { \ GBlenderCell* _g = (cells) + (a)*3; \ \ GDST_STOREC(d,_g[0],_g[1],_g[2]); \ }#define GDST_STOREC(d,r,g,b) *(GBlenderPixel*)(d) = GRGB_PACK(r,g,b)#define GDST_COPY_VAR /* nothing */#include "gblany.h"/* Rgb24 blitting routines */#define GDST_TYPE rgb24#define GDST_INCR 3#define GDST_READ(d,p) (p) = GRGB_PACK((d)[0],(d)[1],(d)[2])#define GDST_COPY(d) GDST_STORE3(d,r,g,b)#define GDST_STOREC(d,r,g,b) GDST_STORE3(d,r,g,b)#define GDST_STOREB(d,cells,a) \ { \ GBlenderCell* _g = (cells) + (a)*3; \ \ (d)[0] = _g[0]; \ (d)[1] = _g[1]; \ (d)[2] = _g[2]; \ }#define GDST_STOREP(d,cells,a) \ { \ GBlenderPixel _pix = (cells)[(a)]; \ \ GDST_STORE3(d,_pix >> 16,_pix >> 8,_pix); \ }#define GDST_COPY_VAR /* nothing */#include "gblany.h"/* Rgb565 blitting routines */#define GDST_TYPE rgb565#define GDST_INCR 2#define GDST_READ(d,p) p = (GBlenderPixel)*(unsigned short*)(d); \ p = GRGB565_TO_RGB24(p)#define GDST_COPY_VAR unsigned short pix = GRGB_TO_RGB565(r,g,b);#define GDST_COPY(d) *(unsigned short*)(d) = pix#define GDST_STOREB(d,cells,a) \ { \ GBlenderCell* _g = (cells) + (a)*3; \ \ *(unsigned short*)(d) = GRGB_TO_RGB565(_g[0],_g[1],_g[2]); \ }#define GDST_STOREP(d,cells,a) \ { \ GBlenderPixel _pix = (cells)[(a)]; \ \ *(unsigned short*)(d) = GRGB24_TO_RGB565(_pix); \ }#define GDST_STOREC(d,r,g,b) *(unsigned short*)(d) = GRGB_TO_RGB565(r,g,b)#include "gblany.h"/* Bgr565 blitting routines */#define GDST_TYPE bgr565#define GDST_INCR 2#define GDST_READ(d,p) p = (GBlenderPixel)*(unsigned short*)(d); \ p = GBGR565_TO_RGB24(p)#define GDST_COPY_VAR unsigned short pix = GRGB_TO_BGR565(r,g,b);#define GDST_COPY(d) *(d) = pix#define GDST_STOREB(d,cells,a) \ { \ GBlenderCell* _g = (cells) + (a)*3; \ \ *(unsigned short*)(d) = GRGB_TO_BGR565(_g[0],_g[1],_g[2]); \ }#define GDST_STOREP(d,cells,a) \ { \ GBlenderPixel _pix = (cells)[(a)]; \ \ *(unsigned short*)(d) = GRGB24_TO_BGR565(_pix); \ }#define GDST_STOREC(d,r,g,b) *(unsigned short*)(d) = GRGB_TO_BGR565(r,g,b)#include "gblany.h"/* */static void_gblender_blit_dummy( GBlenderBlit blit, GBlenderPixel color ){ (blit)=(blit); (color)=(color);}GBLENDER_APIDEF( int )gblender_blit_init( GBlenderBlit blit, GBlender blender, int dst_x, int dst_y, GBlenderSourceFormat src_format, const unsigned char* src_buffer, int src_pitch, int src_width, int src_height, GBlenderTargetFormat dst_format, unsigned char* dst_buffer, int dst_pitch, int dst_width, int dst_height ){ int src_x = 0; int src_y = 0; int delta; GBlenderBlitFunc blit_func = 0; switch ( src_format ) { case GBLENDER_SOURCE_GRAY8: switch ( dst_format ) { case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_gray8_rgb32; break; case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_gray8_rgb24; break; case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_gray8_rgb565; break; case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_gray8_bgr565; break; default: ; } break; case GBLENDER_SOURCE_HRGB: switch ( dst_format ) { case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_hrgb_rgb32; break; case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_hrgb_rgb24; break; case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_hrgb_rgb565; break; case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_hrgb_bgr565; break; default: ; } break; case GBLENDER_SOURCE_HBGR: switch ( dst_format ) { case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_hbgr_rgb32; break; case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_hbgr_rgb24; break; case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_hbgr_rgb565; break; case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_hbgr_bgr565; break; default: ; } break; case GBLENDER_SOURCE_VRGB: switch ( dst_format ) { case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_vrgb_rgb32; break; case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_vrgb_rgb24; break; case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_vrgb_rgb565; break; case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_vrgb_bgr565; break; default: ; } break; case GBLENDER_SOURCE_VBGR: switch ( dst_format ) { case GBLENDER_TARGET_RGB32: blit_func = _gblender_blit_vbgr_rgb32; break; case GBLENDER_TARGET_RGB24: blit_func = _gblender_blit_vbgr_rgb24; break; case GBLENDER_TARGET_RGB565: blit_func = _gblender_blit_vbgr_rgb565; break; case GBLENDER_TARGET_BGR565: blit_func = _gblender_blit_vbgr_bgr565; break; default: ; } break; default: ; } blit->blender = blender; blit->blit_func = blit_func; if ( blit_func == 0 ) { /* unsupported blit mode */ blit->blit_func = _gblender_blit_dummy; return -2; } if ( dst_x < 0 ) { src_width += dst_x; src_x -= dst_x; dst_x = 0; } delta = dst_x + src_width - dst_width; if ( delta > 0 ) src_width -= delta; if ( dst_y < 0 ) { src_height += dst_y; src_y -= dst_y; dst_y = 0; } delta = dst_y + src_height - dst_height; if ( delta > 0 ) src_height -= delta; /* nothing to blit */ if ( src_width <= 0 || src_height <= 0 ) { blit->blit_func = _gblender_blit_dummy; return -1; } blit->width = src_width; blit->height = src_height; blit->src_format = src_format; blit->dst_format = dst_format; blit->src_x = src_x; blit->src_y = src_y; blit->src_line = src_buffer + src_pitch*src_y; blit->src_pitch = src_pitch; if ( src_pitch < 0 ) blit->src_line -= (src_height-1)*src_pitch; blit->dst_x = dst_x; blit->dst_y = dst_y; blit->dst_line = dst_buffer + dst_pitch*dst_y; blit->dst_pitch = dst_pitch; if ( dst_pitch < 0 ) blit->dst_line -= (dst_height-1)*dst_pitch; return 0;}?? 快捷鍵說明
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