cursor.c (6934B)
1 #include "qemu/osdep.h" 2 #include "ui/console.h" 3 4 #include "cursor_hidden.xpm" 5 #include "cursor_left_ptr.xpm" 6 7 /* for creating built-in cursors */ 8 static QEMUCursor *cursor_parse_xpm(const char *xpm[]) 9 { 10 QEMUCursor *c; 11 uint32_t ctab[128]; 12 unsigned int width, height, colors, chars; 13 unsigned int line = 0, i, r, g, b, x, y, pixel; 14 char name[16]; 15 uint8_t idx; 16 17 /* parse header line: width, height, #colors, #chars */ 18 if (sscanf(xpm[line], "%u %u %u %u", 19 &width, &height, &colors, &chars) != 4) { 20 fprintf(stderr, "%s: header parse error: \"%s\"\n", 21 __func__, xpm[line]); 22 return NULL; 23 } 24 if (chars != 1) { 25 fprintf(stderr, "%s: chars != 1 not supported\n", __func__); 26 return NULL; 27 } 28 line++; 29 30 /* parse color table */ 31 for (i = 0; i < colors; i++, line++) { 32 if (sscanf(xpm[line], "%c c %15s", &idx, name) == 2) { 33 if (sscanf(name, "#%02x%02x%02x", &r, &g, &b) == 3) { 34 ctab[idx] = (0xff << 24) | (b << 16) | (g << 8) | r; 35 continue; 36 } 37 if (strcmp(name, "None") == 0) { 38 ctab[idx] = 0x00000000; 39 continue; 40 } 41 } 42 fprintf(stderr, "%s: color parse error: \"%s\"\n", 43 __func__, xpm[line]); 44 return NULL; 45 } 46 47 /* parse pixel data */ 48 c = cursor_alloc(width, height); 49 assert(c != NULL); 50 51 for (pixel = 0, y = 0; y < height; y++, line++) { 52 for (x = 0; x < height; x++, pixel++) { 53 idx = xpm[line][x]; 54 c->data[pixel] = ctab[idx]; 55 } 56 } 57 return c; 58 } 59 60 /* nice for debugging */ 61 void cursor_print_ascii_art(QEMUCursor *c, const char *prefix) 62 { 63 uint32_t *data = c->data; 64 int x,y; 65 66 for (y = 0; y < c->height; y++) { 67 fprintf(stderr, "%s: %2d: |", prefix, y); 68 for (x = 0; x < c->width; x++, data++) { 69 if ((*data & 0xff000000) != 0xff000000) { 70 fprintf(stderr, " "); /* transparent */ 71 } else if ((*data & 0x00ffffff) == 0x00ffffff) { 72 fprintf(stderr, "."); /* white */ 73 } else if ((*data & 0x00ffffff) == 0x00000000) { 74 fprintf(stderr, "X"); /* black */ 75 } else { 76 fprintf(stderr, "o"); /* other */ 77 } 78 } 79 fprintf(stderr, "|\n"); 80 } 81 } 82 83 QEMUCursor *cursor_builtin_hidden(void) 84 { 85 return cursor_parse_xpm(cursor_hidden_xpm); 86 } 87 88 QEMUCursor *cursor_builtin_left_ptr(void) 89 { 90 return cursor_parse_xpm(cursor_left_ptr_xpm); 91 } 92 93 QEMUCursor *cursor_alloc(int width, int height) 94 { 95 QEMUCursor *c; 96 size_t datasize = width * height * sizeof(uint32_t); 97 98 if (width > 512 || height > 512) { 99 return NULL; 100 } 101 102 c = g_malloc0(sizeof(QEMUCursor) + datasize); 103 c->width = width; 104 c->height = height; 105 c->refcount = 1; 106 return c; 107 } 108 109 void cursor_get(QEMUCursor *c) 110 { 111 c->refcount++; 112 } 113 114 void cursor_put(QEMUCursor *c) 115 { 116 if (c == NULL) 117 return; 118 c->refcount--; 119 if (c->refcount) 120 return; 121 g_free(c); 122 } 123 124 int cursor_get_mono_bpl(QEMUCursor *c) 125 { 126 return DIV_ROUND_UP(c->width, 8); 127 } 128 129 void cursor_set_mono(QEMUCursor *c, 130 uint32_t foreground, uint32_t background, uint8_t *image, 131 int transparent, uint8_t *mask) 132 { 133 uint32_t *data = c->data; 134 uint8_t bit; 135 int x,y,bpl; 136 bool expand_bitmap_only = image == mask; 137 bool has_inverted_colors = false; 138 const uint32_t inverted = 0x80000000; 139 140 /* 141 * Converts a monochrome bitmap with XOR mask 'image' and AND mask 'mask': 142 * https://docs.microsoft.com/en-us/windows-hardware/drivers/display/drawing-monochrome-pointers 143 */ 144 bpl = cursor_get_mono_bpl(c); 145 for (y = 0; y < c->height; y++) { 146 bit = 0x80; 147 for (x = 0; x < c->width; x++, data++) { 148 if (transparent && mask[x/8] & bit) { 149 if (!expand_bitmap_only && image[x / 8] & bit) { 150 *data = inverted; 151 has_inverted_colors = true; 152 } else { 153 *data = 0x00000000; 154 } 155 } else if (!transparent && !(mask[x/8] & bit)) { 156 *data = 0x00000000; 157 } else if (image[x/8] & bit) { 158 *data = 0xff000000 | foreground; 159 } else { 160 *data = 0xff000000 | background; 161 } 162 bit >>= 1; 163 if (bit == 0) { 164 bit = 0x80; 165 } 166 } 167 mask += bpl; 168 image += bpl; 169 } 170 171 /* 172 * If there are any pixels with inverted colors, create an outline (fill 173 * transparent neighbors with the background color) and use the foreground 174 * color as "inverted" color. 175 */ 176 if (has_inverted_colors) { 177 data = c->data; 178 for (y = 0; y < c->height; y++) { 179 for (x = 0; x < c->width; x++, data++) { 180 if (*data == 0 /* transparent */ && 181 ((x > 0 && data[-1] == inverted) || 182 (x + 1 < c->width && data[1] == inverted) || 183 (y > 0 && data[-c->width] == inverted) || 184 (y + 1 < c->height && data[c->width] == inverted))) { 185 *data = 0xff000000 | background; 186 } 187 } 188 } 189 data = c->data; 190 for (x = 0; x < c->width * c->height; x++, data++) { 191 if (*data == inverted) { 192 *data = 0xff000000 | foreground; 193 } 194 } 195 } 196 } 197 198 void cursor_get_mono_image(QEMUCursor *c, int foreground, uint8_t *image) 199 { 200 uint32_t *data = c->data; 201 uint8_t bit; 202 int x,y,bpl; 203 204 bpl = cursor_get_mono_bpl(c); 205 memset(image, 0, bpl * c->height); 206 for (y = 0; y < c->height; y++) { 207 bit = 0x80; 208 for (x = 0; x < c->width; x++, data++) { 209 if (((*data & 0xff000000) == 0xff000000) && 210 ((*data & 0x00ffffff) == foreground)) { 211 image[x/8] |= bit; 212 } 213 bit >>= 1; 214 if (bit == 0) { 215 bit = 0x80; 216 } 217 } 218 image += bpl; 219 } 220 } 221 222 void cursor_get_mono_mask(QEMUCursor *c, int transparent, uint8_t *mask) 223 { 224 uint32_t *data = c->data; 225 uint8_t bit; 226 int x,y,bpl; 227 228 bpl = cursor_get_mono_bpl(c); 229 memset(mask, 0, bpl * c->height); 230 for (y = 0; y < c->height; y++) { 231 bit = 0x80; 232 for (x = 0; x < c->width; x++, data++) { 233 if ((*data & 0xff000000) != 0xff000000) { 234 if (transparent != 0) { 235 mask[x/8] |= bit; 236 } 237 } else { 238 if (transparent == 0) { 239 mask[x/8] |= bit; 240 } 241 } 242 bit >>= 1; 243 if (bit == 0) { 244 bit = 0x80; 245 } 246 } 247 mask += bpl; 248 } 249 }