projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| d23948b1 MW |
1 | /* |
| 2 | * QEMU model of the Milkymist VGA framebuffer. | |
| 3 | * | |
| 4 | * Copyright (c) 2010 Michael Walle <michael@walle.cc> | |
| 5 | * | |
| 6 | * This library is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * This library is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
| 18 | * | |
| 19 | */ | |
| 20 | ||
| 21 | #if BITS == 8 | |
| 22 | #define COPY_PIXEL(to, r, g, b) \ | |
| 23 | do { \ | |
| 24 | *to = rgb_to_pixel8(r, g, b); \ | |
| 25 | to += 1; \ | |
| 26 | } while (0) | |
| 27 | #elif BITS == 15 | |
| 28 | #define COPY_PIXEL(to, r, g, b) \ | |
| 29 | do { \ | |
| 30 | *(uint16_t *)to = rgb_to_pixel15(r, g, b); \ | |
| 31 | to += 2; \ | |
| 32 | } while (0) | |
| 33 | #elif BITS == 16 | |
| 34 | #define COPY_PIXEL(to, r, g, b) \ | |
| 35 | do { \ | |
| 36 | *(uint16_t *)to = rgb_to_pixel16(r, g, b); \ | |
| 37 | to += 2; \ | |
| 38 | } while (0) | |
| 39 | #elif BITS == 24 | |
| 40 | #define COPY_PIXEL(to, r, g, b) \ | |
| 41 | do { \ | |
| 42 | uint32 tmp = rgb_to_pixel24(r, g, b); \ | |
| 43 | *(to++) = tmp & 0xff; \ | |
| 44 | *(to++) = (tmp >> 8) & 0xff; \ | |
| 45 | *(to++) = (tmp >> 16) & 0xff; \ | |
| 46 | } while (0) | |
| 47 | #elif BITS == 32 | |
| 48 | #define COPY_PIXEL(to, r, g, b) \ | |
| 49 | do { \ | |
| 50 | *(uint32_t *)to = rgb_to_pixel32(r, g, b); \ | |
| 51 | to += 4; \ | |
| 52 | } while (0) | |
| 53 | #else | |
| 54 | #error unknown bit depth | |
| 55 | #endif | |
| 56 | ||
| 57 | static void glue(draw_line_, BITS)(void *opaque, uint8_t *d, const uint8_t *s, | |
| 58 | int width, int deststep) | |
| 59 | { | |
| 60 | uint16_t rgb565; | |
| 61 | uint8_t r, g, b; | |
| 62 | ||
| 63 | while (width--) { | |
| 64 | rgb565 = lduw_raw(s); | |
| 65 | r = ((rgb565 >> 11) & 0x1f) << 3; | |
| 66 | g = ((rgb565 >> 5) & 0x3f) << 2; | |
| 67 | b = ((rgb565 >> 0) & 0x1f) << 3; | |
| 68 | COPY_PIXEL(d, r, g, b); | |
| 69 | s += 2; | |
| 70 | } | |
| 71 | } | |
| 72 | ||
| 73 | #undef BITS | |
| 74 | #undef COPY_PIXEL |