Changeset 2777 for libpipi/trunk/pipi/paint/line.c
- Timestamp:
- 08/27/08 13:17:26 (5 years ago)
- File:
-
- 1 edited
-
libpipi/trunk/pipi/paint/line.c (modified) (4 diffs)
Legend:
- Unmodified
- Added
- Removed
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libpipi/trunk/pipi/paint/line.c
r2776 r2777 49 49 static void draw_aliased_line_gray(pipi_image_t *img, struct line* s); 50 50 static void draw_aliased_line_float(pipi_image_t *img, struct line* s); 51 52 53 54 int pipi_draw_line(pipi_image_t *img , int x1, int y1, int x2, int y2, uint32_t c) 51 static void draw_antialiased_line_float(pipi_image_t *img, struct line* s); 52 static void draw_antialiased_line_gray(pipi_image_t *img, struct line* s); 53 54 55 56 int pipi_draw_line(pipi_image_t *img , int x1, int y1, int x2, int y2, uint32_t c, int aa) 55 57 { 56 58 struct line s; … … 60 62 s.y2 = y2; 61 63 62 if(img->last_modified == PIPI_PIXELS_RGBA_C) { 64 /* No Transparency routine for u32 yet, fallback to float version */ 65 if(img->last_modified == PIPI_PIXELS_RGBA_C) 66 { 67 if(!aa) 68 { 69 uint32_t *dstdata; 70 dstdata = (uint32_t *)pipi_getpixels(img, PIPI_PIXELS_RGBA_C)->pixels; 71 s.color32 = c; 72 s.buf_u32 = dstdata; 73 s.draw = draw_aliased_line_u32; 74 } 75 else 76 { 77 float *dstdata; 78 dstdata = (float *)pipi_getpixels(img, PIPI_PIXELS_RGBA_F)->pixels; 79 s.colorf[2] = ((c&0x00FF0000)>>16)/255.0f; /* XXX FIXME */ 80 s.colorf[1] = ((c&0x0000FF00)>>8)/255.0f; /* XXX FIXME */ 81 s.colorf[0] = (c&0x000000FF)/255.0f; /* XXX FIXME */ 82 s.buf_f = dstdata; 83 s.draw = draw_antialiased_line_float; 84 } 85 } 86 else if(img->last_modified == PIPI_PIXELS_Y_F) 87 { 88 float *dstdata; 89 dstdata = (float *)pipi_getpixels(img, PIPI_PIXELS_Y_F)->pixels; 90 s.colorf[0] = c/255.0f; /* XXX FIXME */ 91 s.buf_f = dstdata; 92 s.draw = aa==0?draw_aliased_line_gray:draw_antialiased_line_gray; 93 } 94 else 95 { 96 float *dstdata; 97 dstdata = (float *)pipi_getpixels(img, PIPI_PIXELS_RGBA_F)->pixels; 98 s.colorf[2] = ((c&0x00FF0000)>>16)/255.0f; /* XXX FIXME */ 99 s.colorf[1] = ((c&0x0000FF00)>>8)/255.0f; /* XXX FIXME */ 100 s.colorf[0] = (c&0x000000FF)/255.0f; /* XXX FIXME */ 101 s.buf_f = dstdata; 102 s.draw = aa==0?draw_aliased_line_float:draw_antialiased_line_float; 103 } 104 105 clip_line(img, &s); 106 return 0; 107 } 108 109 110 int pipi_draw_polyline(pipi_image_t *img, int const x[], int const y[], 111 int n, uint32_t c) 112 { 113 int i; 114 struct line s; 115 116 if(img->last_modified == PIPI_PIXELS_RGBA_C) 117 { 63 118 uint32_t *dstdata; 64 119 dstdata = (uint32_t *)pipi_getpixels(img, PIPI_PIXELS_RGBA_C)->pixels; … … 66 121 s.buf_u32 = dstdata; 67 122 s.draw = draw_aliased_line_u32; 68 } else if(img->last_modified == PIPI_PIXELS_Y_F) { 69 float *dstdata; 70 dstdata = (float *)pipi_getpixels(img, PIPI_PIXELS_Y_F)->pixels; 71 s.colorf[0] = c/255.0f; /* XXX FIXME */ 72 s.buf_f = dstdata; 73 s.draw = draw_aliased_line_gray; 74 75 76 } else { 77 float *dstdata; 78 dstdata = (float *)pipi_getpixels(img, PIPI_PIXELS_RGBA_F)->pixels; 79 s.colorf[0] = (c&0x00FF0000)/255.0f; /* XXX FIXME */ 80 s.colorf[1] = (c&0x0000FF00)/255.0f; /* XXX FIXME */ 81 s.colorf[2] = (c&0x000000FF)/255.0f; /* XXX FIXME */ 82 s.buf_f = dstdata; 83 s.draw = draw_aliased_line_float; 84 } 85 86 clip_line(img, &s); 87 return 0; 88 } 89 90 91 int pipi_draw_polyline(pipi_image_t *img, int const x[], int const y[], 92 int n, uint32_t c) 93 { 94 int i; 95 struct line s; 96 97 if(img->last_modified == PIPI_PIXELS_RGBA_C) { 98 uint32_t *dstdata; 99 dstdata = (uint32_t *)pipi_getpixels(img, PIPI_PIXELS_RGBA_C)->pixels; 100 s.color32 = c; 101 s.buf_u32 = dstdata; 102 s.draw = draw_aliased_line_u32; 103 } else { 123 } 124 else 125 { 104 126 float *dstdata; 105 127 dstdata = (float *)pipi_getpixels(img, PIPI_PIXELS_RGBA_F)->pixels; … … 205 227 static void draw_aliased_line_u32(pipi_image_t *img, struct line* s) 206 228 { 207 208 209 229 #undef ASSIGN 230 #define ASSIGN(x, y, w) s->buf_u32[x+y*w] = s->color32; 231 #include "line_template.c" 210 232 } 211 233 static void draw_aliased_line_float(pipi_image_t *img, struct line* s) 212 234 { 213 214 235 #undef ASSIGN 236 #define ASSIGN(x, y, w) s->buf_f[(x*4)+y*(w*4)] = s->colorf[0]; \ 215 237 s->buf_f[1 + (x*4)+y*(w*4)] = s->colorf[1]; \ 216 238 s->buf_f[2 + (x*4)+y*(w*4)] = s->colorf[2]; 217 239 #include "line_template.c" 218 240 } 219 241 static void draw_aliased_line_gray(pipi_image_t *img, struct line* s) 220 242 { 221 #undef ASSIGN 222 #define ASSIGN(x, y, w) s->buf_f[x+y*w] = s->colorf[0]; 223 #include "line_template.c" 224 } 243 #undef ASSIGN 244 #define ASSIGN(x, y, w) s->buf_f[x+y*w] = s->colorf[0]; 245 #include "line_template.c" 246 } 247 248 /* Xiaolin Wu's line algorithm, as seen at http://portal.acm.org/citation.cfm?id=122734 */ 249 250 /* math.h doesn't like y0 (sucker) */ 251 float floorf(float x); 252 float truncf(float x); 253 float fabsf(float x); 254 static float fractf(float d) { return (d - floorf(d)); } 255 static float fractinvf(float d) { return (1 - (d - floorf(d))); } 256 257 static void draw_antialiased_line_float(pipi_image_t *img, struct line* s) 258 { 259 /* Is that an horrible mess ? Yes, it is. */ 260 #undef PLOT 261 #define PLOT(x, y, c) \ 262 s->buf_f[(((int)(x)*4))+((int)(y))*(img->w*4)] = \ 263 (c*s->colorf[0]) + (1-c) * s->buf_f[(((int)(x)*4))+((int)(y))*(img->w*4)]; \ 264 s->buf_f[(1+((int)(x)*4))+((int)(y))*(img->w*4)] = \ 265 (c*s->colorf[1]) + (1-c) * s->buf_f[(1+((int)(x)*4))+((int)(y))*(img->w*4)]; \ 266 s->buf_f[(2+((int)(x)*4))+((int)(y))*(img->w*4)] = \ 267 (c*s->colorf[2]) + (1-c) * s->buf_f[(2+((int)(x)*4))+((int)(y))*(img->w*4)]; 268 #include "aline_template.c" 269 } 270 271 272 static void draw_antialiased_line_gray(pipi_image_t *img, struct line* s) 273 { 274 #undef PLOT 275 #define PLOT(x, y, c) s->buf_f[((int)(x))+((int)(y))*img->w] = \ 276 (c*s->colorf[0]) + (1-c) * s->buf_f[((int)(x))+((int)(y))*img->w]; 277 #include "aline_template.c" 278 }
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