pixman/pixman.h

   1 /***********************************************************
   2
   3 Copyright 1987, 1998  The Open Group
   4
   5 Permission to use, copy, modify, distribute, and sell this software and its
   6 documentation for any purpose is hereby granted without fee, provided that
   7 the above copyright notice appear in all copies and that both that
   8 copyright notice and this permission notice appear in supporting
   9 documentation.
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20
  21 Except as contained in this notice, the name of The Open Group shall not be
  22 used in advertising or otherwise to promote the sale, use or other dealings
  23 in this Software without prior written authorization from The Open Group.
  24
  25 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
  26
  27                         All Rights Reserved
  28
  29 Permission to use, copy, modify, and distribute this software and its
  30 documentation for any purpose and without fee is hereby granted,
  31 provided that the above copyright notice appear in all copies and that
  32 both that copyright notice and this permission notice appear in
  33 supporting documentation, and that the name of Digital not be
  34 used in advertising or publicity pertaining to distribution of the
  35 software without specific, written prior permission.
  36
  37 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  39 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  43 SOFTWARE.
  44
  45 ******************************************************************/
  46 /*
  47  * Copyright © 1998, 2004 Keith Packard
  48  * Copyright   2007 Red Hat, Inc.
  49  *
  50  * Permission to use, copy, modify, distribute, and sell this software and its
  51  * documentation for any purpose is hereby granted without fee, provided that
  52  * the above copyright notice appear in all copies and that both that
  53  * copyright notice and this permission notice appear in supporting
  54  * documentation, and that the name of Keith Packard not be used in
  55  * advertising or publicity pertaining to distribution of the software without
  56  * specific, written prior permission.  Keith Packard makes no
  57  * representations about the suitability of this software for any purpose.  It
  58  * is provided "as is" without express or implied warranty.
  59  *
  60  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  61  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  62  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  63  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  64  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  65  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  66  * PERFORMANCE OF THIS SOFTWARE.
  67  */
  68
  69 #ifndef PIXMAN_H__
  70 #define PIXMAN_H__
  71
  72 /*
  73  * Standard integers
  74  */
  75 #if defined (__SVR4) && defined (__sun)
  76 #  include <sys/int_types.h>
  77 #  include <stdint.h>
  78 #elif defined (__OpenBSD__)
  79 #  include <inttypes.h>
  80 #elif defined (_MSC_VER)
  81 typedef __int8 int8_t;
  82 typedef unsigned __int8 uint8_t;
  83 typedef __int16 int16_t;
  84 typedef unsigned __int16 uint16_t;
  85 typedef __int32 int32_t;
  86 typedef unsigned __int32 uint32_t;
  87 typedef __int64 int64_t;
  88 typedef unsigned __int64 uint64_t;
  89 #else
  90 #  include <stdint.h>
  91 #endif
  92
  93 /*
  94  * Boolean
  95  */
  96 typedef int pixman_bool_t;
  97
  98 /*
  99  * Fixpoint numbers
 100  */
 101 typedef int64_t                 pixman_fixed_32_32_t;
 102 typedef pixman_fixed_32_32_t    pixman_fixed_48_16_t;
 103 typedef uint32_t                pixman_fixed_1_31_t;
 104 typedef uint32_t                pixman_fixed_1_16_t;
 105 typedef int32_t                 pixman_fixed_16_16_t;
 106 typedef pixman_fixed_16_16_t    pixman_fixed_t;
 107
 108 #define pixman_fixed_e                  ((pixman_fixed_t) 1)
 109 #define pixman_fixed_1                  (pixman_int_to_fixed(1))
 110 #define pixman_fixed_1_minus_e          (pixman_fixed_1 - pixman_fixed_e)
 111 #define pixman_fixed_to_int(f)          ((int) ((f) >> 16))
 112 #define pixman_int_to_fixed(i)          ((pixman_fixed_t) ((i) << 16))
 113 #define pixman_fixed_to_double(f)       (double) ((f) / (double) pixman_fixed_1)
 114 #define pixman_double_to_fixed(d)       ((pixman_fixed_t) ((d) * 65536.0))
 115 #define pixman_fixed_frac(f)            ((f) & pixman_fixed_1_minus_e)
 116 #define pixman_fixed_floor(f)           ((f) & ~pixman_fixed_1_minus_e)
 117 #define pixman_fixed_ceil(f)            pixman_fixed_floor ((f) + pixman_fixed_1_minus_e)
 118 #define pixman_fixed_fraction(f)        ((f) & pixman_fixed_1_minus_e)
 119 #define pixman_fixed_mod_2(f)           ((f) & (pixman_fixed1 | pixman_fixed_1_minus_e))
 120 #define pixman_max_fixed_48_16          ((pixman_fixed_48_16_t) 0x7fffffff)
 121 #define pixman_min_fixed_48_16          (-((pixman_fixed_48_16_t) 1 << 31))
 122
 123 /*
 124  * Misc structs
 125  */
 126 typedef struct pixman_color pixman_color_t;
 127 typedef struct pixman_point_fixed pixman_point_fixed_t;
 128 typedef struct pixman_line_fixed pixman_line_fixed_t;
 129 typedef struct pixman_vector pixman_vector_t;
 130 typedef struct pixman_transform pixman_transform_t;
 131
 132 struct pixman_color
 133 {
 134     uint16_t    red;
 135     uint16_t    green;
 136     uint16_t    blue;
 137     uint16_t    alpha;
 138 };
 139
 140 struct pixman_point_fixed
 141 {
 142     pixman_fixed_t      x;
 143     pixman_fixed_t      y;
 144 };
 145
 146 struct pixman_line_fixed
 147 {
 148     pixman_point_fixed_t        p1, p2;
 149 };
 150
 151 struct pixman_vector
 152 {
 153     pixman_fixed_t      vector[3];
 154 };
 155
 156 struct pixman_transform
 157 {
 158     pixman_fixed_t      matrix[3][3];
 159 };
 160
 161 pixman_bool_t pixman_transform_point_3d (pixman_transform_t *transform,
 162                                          pixman_vector_t    *vector);
 163
 164 /* Don't blame me, blame XRender */
 165 typedef enum
 166 {
 167     PIXMAN_REPEAT_NONE,
 168     PIXMAN_REPEAT_NORMAL,
 169     PIXMAN_REPEAT_PAD,
 170     PIXMAN_REPEAT_REFLECT
 171 } pixman_repeat_t;
 172
 173 typedef enum
 174 {
 175     PIXMAN_FILTER_FAST,
 176     PIXMAN_FILTER_GOOD,
 177     PIXMAN_FILTER_BEST,
 178     PIXMAN_FILTER_NEAREST,
 179     PIXMAN_FILTER_BILINEAR,
 180     PIXMAN_FILTER_CONVOLUTION
 181 } pixman_filter_t;
 182
 183 typedef enum
 184 {
 185     PIXMAN_OP_CLEAR                     = 0x00
 186     PIXMAN_OP_SRC                       = 0x01,
 187     PIXMAN_OP_DST                       = 0x02,
 188     PIXMAN_OP_OVER                      = 0x03,
 189     PIXMAN_OP_OVER_REVERSE              = 0x04,
 190     PIXMAN_OP_IN                        = 0x05,
 191     PIXMAN_OP_IN_REVERSE                = 0x06,
 192     PIXMAN_OP_OUT                       = 0x07,
 193     PIXMAN_OP_OUT_REVERSE               = 0x08,
 194     PIXMAN_OP_ATOP                      = 0x09,
 195     PIXMAN_OP_ATOP_REVERSE              = 0x0a,
 196     PIXMAN_OP_XOR                       = 0x0b,
 197     PIXMAN_OP_ADD                       = 0x0c,
 198     PIXMAN_OP_SATURATE                  = 0x0d,
 199
 200     PIXMAN_OP_DISJOINT_CLEAR            = 0x10,
 201     PIXMAN_OP_DISJOINT_SRC              = 0x11,
 202     PIXMAN_OP_DISJOINT_DST              = 0x12,
 203     PIXMAN_OP_DISJOINT_OVER             = 0x13,
 204     PIXMAN_OP_DISJOINT_OVER_REVERSE     = 0x14,
 205     PIXMAN_OP_DISJOINT_IN               = 0x15,
 206     PIXMAN_OP_DISJOINT_IN_REVERSE       = 0x16,
 207     PIXMAN_OP_DISJOINT_OUT              = 0x17,
 208     PIXMAN_OP_DISJOINT_OUT_REVERSE      = 0x18,
 209     PIXMAN_OP_DISJOINT_ATOP             = 0x19,
 210     PIXMAN_OP_DISJOINT_ATOP_REVERSE     = 0x1a,
 211     PIXMAN_OP_DISJOINT_XOR              = 0x1b,
 212
 213     PIXMAN_OP_CONJOINT_CLEAR            = 0x20,
 214     PIXMAN_OP_CONJOINT_SRC              = 0x21,
 215     PIXMAN_OP_CONJOINT_DST              = 0x22,
 216     PIXMAN_OP_CONJOINT_OVER             = 0x23,
 217     PIXMAN_OP_CONJOINT_OVER_REVERSE     = 0x24,
 218     PIXMAN_OP_CONJOINT_IN               = 0x25,
 219     PIXMAN_OP_CONJOINT_IN_REVERSE       = 0x26,
 220     PIXMAN_OP_CONJOINT_OUT              = 0x27,
 221     PIXMAN_OP_CONJOINT_OUT_REVERSE      = 0x28,
 222     PIXMAN_OP_CONJOINT_ATOP             = 0x29,
 223     PIXMAN_OP_CONJOINT_ATOP_REVERSE     = 0x2a,
 224     PIXMAN_OP_CONJOINT_XOR              = 0x2b,
 225 } pixman_op_t;
 226
 227 /*
 228  * Regions
 229  */
 230 typedef struct pixman_region16_data     pixman_region16_data_t;
 231 typedef struct pixman_box16             pixman_box16_t;
 232 typedef struct pixman_rectangle16       pixman_rectangle16_t;
 233 typedef struct pixman_region16          pixman_region16_t;
 234
 235 struct pixman_region16_data {
 236     long                size;
 237     long                numRects;
 238 /*  pixman_box16_t      rects[size];   in memory but not explicitly declared */
 239 };
 240
 241 struct pixman_rectangle16
 242 {
 243     int16_t x, y;
 244     uint16_t width, height;
 245 };
 246
 247 struct pixman_box16
 248 {
 249     int16_t x1, y1, x2, y2;
 250 };
 251
 252 struct pixman_region16
 253 {
 254     pixman_box16_t          extents;
 255     pixman_region16_data_t  *data;
 256 };
 257
 258 typedef enum
 259 {
 260     PIXMAN_REGION_OUT,
 261     PIXMAN_REGION_IN,
 262     PIXMAN_REGION_PART
 263 } pixman_region_overlap_t;
 264
 265 /* This function exists only to make it possible to preserve the X ABI - it should
 266  * go away at first opportunity.
 267  */
 268 void                    pixman_region_set_static_pointers (pixman_box16_t *empty_box,
 269                                                            pixman_region16_data_t *empty_data,
 270                                                            pixman_region16_data_t *broken_data);
 271
 272 /* creation/destruction */
 273 void                    pixman_region_init              (pixman_region16_t *region);
 274 void                    pixman_region_init_rect         (pixman_region16_t *region,
 275                                                          int                x,
 276                                                          int                y,
 277                                                          unsigned int       width,
 278                                                          unsigned int       height);
 279 void                    pixman_region_init_with_extents (pixman_region16_t *region,
 280                                                          pixman_box16_t    *extents);
 281 void                    pixman_region_fini              (pixman_region16_t *region);
 282
 283 /* manipulation */
 284 void                    pixman_region_translate  (pixman_region16_t *region,
 285                                                   int                x,
 286                                                   int                y);
 287 pixman_bool_t           pixman_region_copy       (pixman_region16_t *dest,
 288                                                   pixman_region16_t *source);
 289 pixman_bool_t           pixman_region_intersect  (pixman_region16_t *newReg,
 290                                                   pixman_region16_t *reg1,
 291                                                   pixman_region16_t *reg2);
 292 pixman_bool_t           pixman_region_union      (pixman_region16_t *newReg,
 293                                                   pixman_region16_t *reg1,
 294                                                   pixman_region16_t *reg2);
 295 pixman_bool_t           pixman_region_union_rect (pixman_region16_t *dest,
 296                                                   pixman_region16_t *source,
 297                                                   int                x,
 298                                                   int                y,
 299                                                   unsigned int       width,
 300                                                   unsigned int       height);
 301 pixman_bool_t           pixman_region_subtract   (pixman_region16_t *regD,
 302                                                   pixman_region16_t *regM,
 303                                                   pixman_region16_t *regS);
 304 pixman_bool_t           pixman_region_inverse    (pixman_region16_t *newReg,
 305                                                   pixman_region16_t *reg1,
 306                                                   pixman_box16_t    *invRect);
 307 pixman_bool_t           pixman_region_contains_point (pixman_region16_t *region,
 308                                                       int x, int y, pixman_box16_t *box);
 309 pixman_region_overlap_t pixman_region_contains_rectangle (pixman_region16_t *pixman_region16_t,
 310                                                           pixman_box16_t *prect);
 311 pixman_bool_t           pixman_region_not_empty (pixman_region16_t *region);
 312 pixman_box16_t *        pixman_region_extents (pixman_region16_t *region);
 313 int                     pixman_region_n_rects (pixman_region16_t *region);
 314 pixman_box16_t *        pixman_region_rectangles (pixman_region16_t *region,
 315                                                   int               *n_rects);
 316 pixman_bool_t           pixman_region_equal (pixman_region16_t *region1,
 317                                              pixman_region16_t *region2);
 318 pixman_bool_t           pixman_region_selfcheck (pixman_region16_t *region);
 319 void                    pixman_region_reset (pixman_region16_t *region, pixman_box16_t *box);
 320 pixman_bool_t           pixman_region_init_rects (pixman_region16_t *region,
 321                                                   pixman_box16_t *boxes, int count);
 322
 323 /* Copy / Fill */
 324 pixman_bool_t pixman_blt (uint32_t *src_bits,
 325                           uint32_t *dst_bits,
 326                           int src_stride,
 327                           int dst_stride,
 328                           int src_bpp,
 329                           int dst_bpp,
 330                           int src_x, int src_y,
 331                           int dst_x, int dst_y,
 332                           int width, int height);
 333 pixman_bool_t pixman_fill (uint32_t *bits,
 334                            int stride,
 335                            int bpp,
 336                            int x,
 337                            int y,
 338                            int width,
 339                            int height,
 340                            uint32_t xor);
 341 /*
 342  * Images
 343  */
 344 typedef  union pixman_image             pixman_image_t;
 345 typedef struct pixman_indexed           pixman_indexed_t;
 346 typedef struct pixman_gradient_stop     pixman_gradient_stop_t;
 347
 348 typedef uint32_t (* pixman_read_memory_func_t) (const void *src, int size);
 349 typedef void     (* pixman_write_memory_func_t) (void *dst, uint32_t value, int size);
 350
 351 struct pixman_gradient_stop {
 352     pixman_fixed_t x;
 353     pixman_color_t color;
 354 };
 355
 356 #define PIXMAN_MAX_INDEXED  256 /* XXX depth must be <= 8 */
 357
 358 #if PIXMAN_MAX_INDEXED <= 256
 359 typedef uint8_t pixman_index_type;
 360 #endif
 361
 362 struct pixman_indexed
 363 {
 364     pixman_bool_t       color;
 365     uint32_t            rgba[PIXMAN_MAX_INDEXED];
 366     pixman_index_type   ent[32768];
 367 };
 368
 369 /*
 370  * While the protocol is generous in format support, the
 371  * sample implementation allows only packed RGB and GBR
 372  * representations for data to simplify software rendering,
 373  */
 374 #define PIXMAN_FORMAT(bpp,type,a,r,g,b) (((bpp) << 24) |  \
 375                                          ((type) << 16) | \
 376                                          ((a) << 12) |    \
 377                                          ((r) << 8) |     \
 378                                          ((g) << 4) |     \
 379                                          ((b)))
 380
 381 #define PIXMAN_FORMAT_BPP(f)    (((f) >> 24)       )
 382 #define PIXMAN_FORMAT_TYPE(f)   (((f) >> 16) & 0xff)
 383 #define PIXMAN_FORMAT_A(f)      (((f) >> 12) & 0x0f)
 384 #define PIXMAN_FORMAT_R(f)      (((f) >>  8) & 0x0f)
 385 #define PIXMAN_FORMAT_G(f)      (((f) >>  4) & 0x0f)
 386 #define PIXMAN_FORMAT_B(f)      (((f)      ) & 0x0f)
 387 #define PIXMAN_FORMAT_RGB(f)    (((f)      ) & 0xfff)
 388 #define PIXMAN_FORMAT_VIS(f)    (((f)      ) & 0xffff)
 389 #define PIXMAN_FORMAT_DEPTH(f)  (PIXMAN_FORMAT_A(f) +   \
 390                                  PIXMAN_FORMAT_R(f) +   \
 391                                  PIXMAN_FORMAT_G(f) +   \
 392                                  PIXMAN_FORMAT_B(f))
 393
 394 #define PIXMAN_TYPE_OTHER       0
 395 #define PIXMAN_TYPE_A           1
 396 #define PIXMAN_TYPE_ARGB        2
 397 #define PIXMAN_TYPE_ABGR        3
 398 #define PIXMAN_TYPE_COLOR       4
 399 #define PIXMAN_TYPE_GRAY        5
 400
 401 #define PIXMAN_FORMAT_COLOR(f)  (PIXMAN_FORMAT_TYPE(f) & 2)
 402
 403 /* 32bpp formats */
 404 typedef enum {
 405     PIXMAN_a8r8g8b8 =   PIXMAN_FORMAT(32,PIXMAN_TYPE_ARGB,8,8,8,8),
 406     PIXMAN_x8r8g8b8 =   PIXMAN_FORMAT(32,PIXMAN_TYPE_ARGB,0,8,8,8),
 407     PIXMAN_a8b8g8r8 =   PIXMAN_FORMAT(32,PIXMAN_TYPE_ABGR,8,8,8,8),
 408     PIXMAN_x8b8g8r8 =   PIXMAN_FORMAT(32,PIXMAN_TYPE_ABGR,0,8,8,8),
 409
 410 /* 24bpp formats */
 411     PIXMAN_r8g8b8 =     PIXMAN_FORMAT(24,PIXMAN_TYPE_ARGB,0,8,8,8),
 412     PIXMAN_b8g8r8 =     PIXMAN_FORMAT(24,PIXMAN_TYPE_ABGR,0,8,8,8),
 413
 414 /* 16bpp formats */
 415     PIXMAN_r5g6b5 =     PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,0,5,6,5),
 416     PIXMAN_b5g6r5 =     PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,0,5,6,5),
 417
 418     PIXMAN_a1r5g5b5 =   PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,1,5,5,5),
 419     PIXMAN_x1r5g5b5 =   PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,0,5,5,5),
 420     PIXMAN_a1b5g5r5 =   PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,1,5,5,5),
 421     PIXMAN_x1b5g5r5 =   PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,0,5,5,5),
 422     PIXMAN_a4r4g4b4 =   PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,4,4,4,4),
 423     PIXMAN_x4r4g4b4 =   PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,0,4,4,4),
 424     PIXMAN_a4b4g4r4 =   PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,4,4,4,4),
 425     PIXMAN_x4b4g4r4 =   PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,0,4,4,4),
 426
 427 /* 8bpp formats */
 428     PIXMAN_a8 =         PIXMAN_FORMAT(8,PIXMAN_TYPE_A,8,0,0,0),
 429     PIXMAN_r3g3b2 =     PIXMAN_FORMAT(8,PIXMAN_TYPE_ARGB,0,3,3,2),
 430     PIXMAN_b2g3r3 =     PIXMAN_FORMAT(8,PIXMAN_TYPE_ABGR,0,3,3,2),
 431     PIXMAN_a2r2g2b2 =   PIXMAN_FORMAT(8,PIXMAN_TYPE_ARGB,2,2,2,2),
 432     PIXMAN_a2b2g2r2 =   PIXMAN_FORMAT(8,PIXMAN_TYPE_ABGR,2,2,2,2),
 433
 434     PIXMAN_c8 =         PIXMAN_FORMAT(8,PIXMAN_TYPE_COLOR,0,0,0,0),
 435     PIXMAN_g8 =         PIXMAN_FORMAT(8,PIXMAN_TYPE_GRAY,0,0,0,0),
 436
 437     PIXMAN_x4a4 =       PIXMAN_FORMAT(8,PIXMAN_TYPE_A,4,0,0,0),
 438
 439     PIXMAN_x4c4 =       PIXMAN_FORMAT(8,PIXMAN_TYPE_COLOR,0,0,0,0),
 440     PIXMAN_x4g4 =       PIXMAN_FORMAT(8,PIXMAN_TYPE_GRAY,0,0,0,0),
 441
 442 /* 4bpp formats */
 443     PIXMAN_a4 =         PIXMAN_FORMAT(4,PIXMAN_TYPE_A,4,0,0,0),
 444     PIXMAN_r1g2b1 =     PIXMAN_FORMAT(4,PIXMAN_TYPE_ARGB,0,1,2,1),
 445     PIXMAN_b1g2r1 =     PIXMAN_FORMAT(4,PIXMAN_TYPE_ABGR,0,1,2,1),
 446     PIXMAN_a1r1g1b1 =   PIXMAN_FORMAT(4,PIXMAN_TYPE_ARGB,1,1,1,1),
 447     PIXMAN_a1b1g1r1 =   PIXMAN_FORMAT(4,PIXMAN_TYPE_ABGR,1,1,1,1),
 448
 449     PIXMAN_c4 =         PIXMAN_FORMAT(4,PIXMAN_TYPE_COLOR,0,0,0,0),
 450     PIXMAN_g4 =         PIXMAN_FORMAT(4,PIXMAN_TYPE_GRAY,0,0,0,0),
 451
 452 /* 1bpp formats */
 453     PIXMAN_a1 =         PIXMAN_FORMAT(1,PIXMAN_TYPE_A,1,0,0,0),
 454
 455     PIXMAN_g1 =         PIXMAN_FORMAT(1,PIXMAN_TYPE_GRAY,0,0,0,0),
 456 } pixman_format_code_t;
 457
 458 /* Constructors */
 459 pixman_image_t *pixman_image_create_solid_fill       (pixman_color_t               *color);
 460 pixman_image_t *pixman_image_create_linear_gradient  (pixman_point_fixed_t         *p1,
 461                                                       pixman_point_fixed_t         *p2,
 462                                                       const pixman_gradient_stop_t *stops,
 463                                                       int                           n_stops);
 464 pixman_image_t *pixman_image_create_radial_gradient  (pixman_point_fixed_t         *inner,
 465                                                       pixman_point_fixed_t         *outer,
 466                                                       pixman_fixed_t                inner_radius,
 467                                                       pixman_fixed_t                outer_radius,
 468                                                       const pixman_gradient_stop_t *stops,
 469                                                       int                           n_stops);
 470 pixman_image_t *pixman_image_create_conical_gradient (pixman_point_fixed_t         *center,
 471                                                       pixman_fixed_t                angle,
 472                                                       const pixman_gradient_stop_t *stops,
 473                                                       int                           n_stops);
 474 pixman_image_t *pixman_image_create_bits             (pixman_format_code_t          format,
 475                                                       int                           width,
 476                                                       int                           height,
 477                                                       uint32_t                     *bits,
 478                                                       int                           rowstride_bytes);
 479
 480 /* Destructor */
 481 pixman_image_t *pixman_image_ref                     (pixman_image_t               *image);
 482 pixman_bool_t   pixman_image_unref                   (pixman_image_t               *image);
 483
 484
 485 /* Set properties */
 486 pixman_bool_t   pixman_image_set_clip_region         (pixman_image_t               *image,
 487                                                       pixman_region16_t            *region);
 488 void            pixman_image_set_has_client_clip     (pixman_image_t               *image,
 489                                                       pixman_bool_t                 clien_clip);
 490 pixman_bool_t   pixman_image_set_transform           (pixman_image_t               *image,
 491                                                       const pixman_transform_t     *transform);
 492 void            pixman_image_set_repeat              (pixman_image_t               *image,
 493                                                       pixman_repeat_t               repeat);
 494 pixman_bool_t   pixman_image_set_filter              (pixman_image_t               *image,
 495                                                       pixman_filter_t               filter,
 496                                                       const pixman_fixed_t         *filter_params,
 497                                                       int                           n_filter_params);
 498 void            pixman_image_set_filter_params       (pixman_image_t               *image,
 499                                                       pixman_fixed_t               *params,
 500                                                       int                           n_params);
 501 void            pixman_image_set_source_cliping      (pixman_image_t               *image,
 502                                                       pixman_bool_t                 source_clipping);
 503 void            pixman_image_set_alpha_map           (pixman_image_t               *image,
 504                                                       pixman_image_t               *alpha_map,
 505                                                       int16_t                       x,
 506                                                       int16_t                       y);
 507 void            pixman_image_set_component_alpha     (pixman_image_t               *image,
 508                                                       pixman_bool_t                 component_alpha);
 509 void            pixman_image_set_accessors           (pixman_image_t               *image,
 510                                                       pixman_read_memory_func_t     read_func,
 511                                                       pixman_write_memory_func_t    write_func);
 512 void            pixman_image_set_indexed             (pixman_image_t               *image,
 513                                                       const pixman_indexed_t       *indexed);
 514 uint32_t       *pixman_image_get_data                (pixman_image_t               *image);
 515 int             pixman_image_get_width               (pixman_image_t               *image);
 516 int             pixman_image_get_height              (pixman_image_t               *image);
 517 int             pixman_image_get_stride              (pixman_image_t               *image);
 518 int             pixman_image_get_depth               (pixman_image_t               *image);
 519 pixman_bool_t   pixman_image_fill_rectangles         (pixman_op_t                   op,
 520                                                       pixman_image_t               *image,
 521                                                       pixman_color_t               *color,
 522                                                       int                           n_rects,
 523                                                       const pixman_rectangle16_t           *rects);
 524
 525 /* Composite */
 526 pixman_bool_t   pixman_compute_composite_region (pixman_region16_t *    pRegion,
 527                                                  pixman_image_t *       pSrc,
 528                                                  pixman_image_t *       pMask,
 529                                                  pixman_image_t *       pDst,
 530                                                  int16_t                xSrc,
 531                                                  int16_t                ySrc,
 532                                                  int16_t                xMask,
 533                                                  int16_t                yMask,
 534                                                  int16_t                xDst,
 535                                                  int16_t                yDst,
 536                                                  uint16_t               width,
 537                                                  uint16_t               height);
 538 void            pixman_image_composite          (pixman_op_t                op,
 539                                                  pixman_image_t            *src,
 540                                                  pixman_image_t               *mask,
 541                                                  pixman_image_t               *dest,
 542                                                  int16_t                       src_x,
 543                                                  int16_t                       src_y,
 544                                                  int16_t                       mask_x,
 545                                                  int16_t                       mask_y,
 546                                                  int16_t                       dest_x,
 547                                                  int16_t                       dest_y,
 548                                                  uint16_t                      width,
 549                                                  uint16_t                      height);
 550
 551 /*
 552  * Trapezoids
 553  */
 554 typedef struct pixman_edge pixman_edge_t;
 555 typedef struct pixman_trapezoid pixman_trapezoid_t;
 556 typedef struct pixman_trap pixman_trap_t;
 557 typedef struct pixman_span_fix pixman_span_fix_t;
 558
 559 /*
 560  * An edge structure.  This represents a single polygon edge
 561  * and can be quickly stepped across small or large gaps in the
 562  * sample grid
 563  */
 564 struct pixman_edge
 565 {
 566     pixman_fixed_t      x;
 567     pixman_fixed_t      e;
 568     pixman_fixed_t   stepx;
 569     pixman_fixed_t   signdx;
 570     pixman_fixed_t   dy;
 571     pixman_fixed_t   dx;
 572
 573     pixman_fixed_t   stepx_small;
 574     pixman_fixed_t   stepx_big;
 575     pixman_fixed_t   dx_small;
 576     pixman_fixed_t   dx_big;
 577 };
 578
 579 struct pixman_trapezoid
 580 {
 581     pixman_fixed_t  top, bottom;
 582     pixman_line_fixed_t left, right;
 583 };
 584
 585
 586 /* whether 't' is a well defined not obviously empty trapezoid */
 587 #define pixman_trapezoid_valid(t)                               \
 588     ((t)->left.p1.y != (t)->left.p2.y &&                           \
 589      (t)->right.p1.y != (t)->right.p2.y &&                         \
 590      (int) ((t)->bottom - (t)->top) > 0)
 591
 592 struct pixman_span_fix
 593 {
 594     pixman_fixed_t      l, r, y;
 595 };
 596
 597 struct pixman_trap
 598 {
 599     pixman_span_fix_t   top, bot;
 600 };
 601
 602 pixman_fixed_t pixman_sample_ceil_y        (pixman_fixed_t       y,
 603                                             int                  bpp);
 604 pixman_fixed_t pixman_sample_floor_y       (pixman_fixed_t       y,
 605                                             int                  bpp);
 606 void           pixman_edge_step            (pixman_edge_t       *e,
 607                                             int                  n);
 608 void           pixman_edge_init            (pixman_edge_t       *e,
 609                                             int                  bpp,
 610                                             pixman_fixed_t       y_start,
 611                                             pixman_fixed_t       x_top,
 612                                             pixman_fixed_t       y_top,
 613                                             pixman_fixed_t       x_bot,
 614                                             pixman_fixed_t       y_bot);
 615 void           pixman_line_fixed_edge_init (pixman_edge_t       *e,
 616                                             int                  bpp,
 617                                             pixman_fixed_t       y,
 618                                             const pixman_line_fixed_t *line,
 619                                             int                  x_off,
 620                                             int                  y_off);
 621 void           pixman_rasterize_edges      (pixman_image_t      *image,
 622                                             pixman_edge_t       *l,
 623                                             pixman_edge_t       *r,
 624                                             pixman_fixed_t       t,
 625                                             pixman_fixed_t       b);
 626 void           pixman_add_traps            (pixman_image_t      *image,
 627                                             int16_t              x_off,
 628                                             int16_t              y_off,
 629                                             int                  ntrap,
 630                                             pixman_trap_t       *traps);
 631 void           pixman_add_trapezoids       (pixman_image_t      *image,
 632                                             int16_t              x_off,
 633                                             int                  y_off,
 634                                             int                  ntraps,
 635                                             const pixman_trapezoid_t  *traps);
 636 void           pixman_rasterize_trapezoid  (pixman_image_t      *image,
 637                                             const pixman_trapezoid_t  *trap,
 638                                             int                  x_off,
 639                                             int                  y_off);
 640
 641
 642 #endif /* PIXMAN_H__ */