mirror of https://gitee.com/openkylin/qemu.git
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/*
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* QEMU Cirrus VGA Emulator templates
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#if DEPTH == 8
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#define BPP 1
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#elif DEPTH == 15 || DEPTH == 16
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#define BPP 2
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#elif DEPTH == 32
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#define BPP 4
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#else
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#error unsupported depth
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#endif
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static void glue(vga_draw_cursor_line_, DEPTH)(uint8_t *d1,
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const uint8_t *src1,
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int poffset, int w,
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unsigned int color0,
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unsigned int color1,
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unsigned int color_xor)
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{
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const uint8_t *plane0, *plane1;
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int x, b0, b1;
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uint8_t *d;
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d = d1;
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plane0 = src1;
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plane1 = src1 + poffset;
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for (x = 0; x < w; x++) {
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b0 = (plane0[x >> 3] >> (7 - (x & 7))) & 1;
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b1 = (plane1[x >> 3] >> (7 - (x & 7))) & 1;
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#if DEPTH == 8
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switch (b0 | (b1 << 1)) {
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case 0:
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break;
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case 1:
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d[0] ^= color_xor;
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break;
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case 2:
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d[0] = color0;
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break;
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case 3:
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d[0] = color1;
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break;
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}
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#elif DEPTH == 16
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switch (b0 | (b1 << 1)) {
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case 0:
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break;
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case 1:
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((uint16_t *)d)[0] ^= color_xor;
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break;
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case 2:
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((uint16_t *)d)[0] = color0;
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break;
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case 3:
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((uint16_t *)d)[0] = color1;
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break;
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}
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#elif DEPTH == 32
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switch (b0 | (b1 << 1)) {
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case 0:
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break;
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case 1:
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((uint32_t *)d)[0] ^= color_xor;
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break;
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case 2:
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((uint32_t *)d)[0] = color0;
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break;
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case 3:
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((uint32_t *)d)[0] = color1;
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break;
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}
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#else
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#error unsupported depth
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#endif
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d += BPP;
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}
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}
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#undef DEPTH
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#undef BPP
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