1 /* 2 * Copyright 2009 Red Hat, Inc. 3 * Copyright 2000 SuSE, Inc. 4 * Copyright 2007 Red Hat, Inc. 5 * Copyright 2000 Keith Packard, member of The XFree86 Project, Inc. 6 * 2005 Lars Knoll & Zack Rusin, Trolltech 7 * 2008 Aaron Plattner, NVIDIA Corporation 8 * 9 * Permission to use, copy, modify, distribute, and sell this software and its 10 * documentation for any purpose is hereby granted without fee, provided that 11 * the above copyright notice appear in all copies and that both that 12 * copyright notice and this permission notice appear in supporting 13 * documentation, and that the name of Red Hat not be used in advertising or 14 * publicity pertaining to distribution of the software without specific, 15 * written prior permission. Red Hat makes no representations about the 16 * suitability of this software for any purpose. It is provided "as is" 17 * without express or implied warranty. 18 * 19 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS 20 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND 21 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY 22 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 23 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 24 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 25 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 26 * SOFTWARE. 27 */ 28 #ifdef HAVE_CONFIG_H 29 #include <config.h> 30 #endif 31 #include <stdlib.h> 32 #include <string.h> 33 #include <math.h> 34 #include <limits.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include "pixman-private.h" 39 40 static pixman_bool_t 41 general_src_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter) 42 { 43 pixman_image_t *image = iter->image; 44 45 if (image->type == LINEAR) 46 _pixman_linear_gradient_iter_init (image, iter); 47 else if (image->type == RADIAL) 48 _pixman_radial_gradient_iter_init (image, iter); 49 else if (image->type == CONICAL) 50 _pixman_conical_gradient_iter_init (image, iter); 51 else if (image->type == BITS) 52 _pixman_bits_image_src_iter_init (image, iter); 53 else if (image->type == SOLID) 54 _pixman_log_error (FUNC, "Solid image not handled by noop"); 55 else 56 _pixman_log_error (FUNC, "Pixman bug: unknown image type\n"); 57 58 return TRUE; 59 } 60 61 static pixman_bool_t 62 general_dest_iter_init (pixman_implementation_t *imp, pixman_iter_t *iter) 63 { 64 if (iter->image->type == BITS) 65 { 66 _pixman_bits_image_dest_iter_init (iter->image, iter); 67 68 return TRUE; 69 } 70 else 71 { 72 _pixman_log_error (FUNC, "Trying to write to a non-writable image"); 73 74 return FALSE; 75 } 76 } 77 78 typedef struct op_info_t op_info_t; 79 struct op_info_t 80 { 81 uint8_t src, dst; 82 }; 83 84 #define ITER_IGNORE_BOTH \ 85 (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB | ITER_LOCALIZED_ALPHA) 86 87 static const op_info_t op_flags[PIXMAN_N_OPERATORS] = 88 { 89 /* Src Dst */ 90 { ITER_IGNORE_BOTH, ITER_IGNORE_BOTH }, /* CLEAR */ 91 { ITER_LOCALIZED_ALPHA, ITER_IGNORE_BOTH }, /* SRC */ 92 { ITER_IGNORE_BOTH, ITER_LOCALIZED_ALPHA }, /* DST */ 93 { 0, ITER_LOCALIZED_ALPHA }, /* OVER */ 94 { ITER_LOCALIZED_ALPHA, 0 }, /* OVER_REVERSE */ 95 { ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* IN */ 96 { ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* IN_REVERSE */ 97 { ITER_LOCALIZED_ALPHA, ITER_IGNORE_RGB }, /* OUT */ 98 { ITER_IGNORE_RGB, ITER_LOCALIZED_ALPHA }, /* OUT_REVERSE */ 99 { 0, 0 }, /* ATOP */ 100 { 0, 0 }, /* ATOP_REVERSE */ 101 { 0, 0 }, /* XOR */ 102 { ITER_LOCALIZED_ALPHA, ITER_LOCALIZED_ALPHA }, /* ADD */ 103 { 0, 0 }, /* SATURATE */ 104 }; 105 106 #define SCANLINE_BUFFER_LENGTH 8192 107 108 static void 109 general_composite_rect (pixman_implementation_t *imp, 110 pixman_composite_info_t *info) 111 { 112 PIXMAN_COMPOSITE_ARGS (info); 113 uint64_t stack_scanline_buffer[(SCANLINE_BUFFER_LENGTH * 3 + 7) / 8]; 114 uint8_t *scanline_buffer = (uint8_t *) stack_scanline_buffer; 115 uint8_t *src_buffer, *mask_buffer, *dest_buffer; 116 pixman_iter_t src_iter, mask_iter, dest_iter; 117 pixman_combine_32_func_t compose; 118 pixman_bool_t component_alpha; 119 iter_flags_t narrow, src_iter_flags; 120 int Bpp; 121 int i; 122 123 if ((src_image->common.flags & FAST_PATH_NARROW_FORMAT) && 124 (!mask_image || mask_image->common.flags & FAST_PATH_NARROW_FORMAT) && 125 (dest_image->common.flags & FAST_PATH_NARROW_FORMAT)) 126 { 127 narrow = ITER_NARROW; 128 Bpp = 4; 129 } 130 else 131 { 132 narrow = 0; 133 Bpp = 16; 134 } 135 136 if (width * Bpp > SCANLINE_BUFFER_LENGTH) 137 { 138 scanline_buffer = pixman_malloc_abc (width, 3, Bpp); 139 140 if (!scanline_buffer) 141 return; 142 } 143 144 src_buffer = scanline_buffer; 145 mask_buffer = src_buffer + width * Bpp; 146 dest_buffer = mask_buffer + width * Bpp; 147 148 if (!narrow) 149 { 150 /* To make sure there aren't any NANs in the buffers */ 151 memset (src_buffer, 0, width * Bpp); 152 memset (mask_buffer, 0, width * Bpp); 153 memset (dest_buffer, 0, width * Bpp); 154 } 155 156 /* src iter */ 157 src_iter_flags = narrow | op_flags[op].src; 158 159 _pixman_implementation_src_iter_init (imp->toplevel, &src_iter, src_image, 160 src_x, src_y, width, height, 161 src_buffer, src_iter_flags, info->src_flags); 162 163 /* mask iter */ 164 if ((src_iter_flags & (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) == 165 (ITER_IGNORE_ALPHA | ITER_IGNORE_RGB)) 166 { 167 /* If it doesn't matter what the source is, then it doesn't matter 168 * what the mask is 169 */ 170 mask_image = NULL; 171 } 172 173 component_alpha = 174 mask_image && 175 mask_image->common.type == BITS && 176 mask_image->common.component_alpha && 177 PIXMAN_FORMAT_RGB (mask_image->bits.format); 178 179 _pixman_implementation_src_iter_init ( 180 imp->toplevel, &mask_iter, mask_image, mask_x, mask_y, width, height, 181 mask_buffer, narrow | (component_alpha? 0 : ITER_IGNORE_RGB), info->mask_flags); 182 183 /* dest iter */ 184 _pixman_implementation_dest_iter_init ( 185 imp->toplevel, &dest_iter, dest_image, dest_x, dest_y, width, height, 186 dest_buffer, narrow | op_flags[op].dst, info->dest_flags); 187 188 compose = _pixman_implementation_lookup_combiner ( 189 imp->toplevel, op, component_alpha, narrow); 190 191 for (i = 0; i < height; ++i) 192 { 193 uint32_t *s, *m, *d; 194 195 m = mask_iter.get_scanline (&mask_iter, NULL); 196 s = src_iter.get_scanline (&src_iter, m); 197 d = dest_iter.get_scanline (&dest_iter, NULL); 198 199 compose (imp->toplevel, op, d, s, m, width); 200 201 dest_iter.write_back (&dest_iter); 202 } 203 204 if (scanline_buffer != (uint8_t *) stack_scanline_buffer) 205 free (scanline_buffer); 206 } 207 208 static const pixman_fast_path_t general_fast_path[] = 209 { 210 { PIXMAN_OP_any, PIXMAN_any, 0, PIXMAN_any, 0, PIXMAN_any, 0, general_composite_rect }, 211 { PIXMAN_OP_NONE } 212 }; 213 214 pixman_implementation_t * 215 _pixman_implementation_create_general (void) 216 { 217 pixman_implementation_t *imp = _pixman_implementation_create (NULL, general_fast_path); 218 219 _pixman_setup_combiner_functions_32 (imp); 220 _pixman_setup_combiner_functions_float (imp); 221 222 imp->src_iter_init = general_src_iter_init; 223 imp->dest_iter_init = general_dest_iter_init; 224 225 return imp; 226 } 227 228
