Hardware level VGA emulation (only text mode is tested)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@344 c046a42c-6fe2-441c-8c8c-71466251a162
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bellard
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294
hw/vga_template.h
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294
hw/vga_template.h
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/*
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* QEMU 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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#define PIXEL_TYPE uint8_t
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#elif DEPTH == 15 || DEPTH == 16
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#define BPP 2
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#define PIXEL_TYPE uint16_t
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#elif DEPTH == 32
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#define BPP 4
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#define PIXEL_TYPE uint32_t
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#else
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#error unsupport depth
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#endif
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#if DEPTH != 15
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static void glue(vga_draw_glyph8_, DEPTH)(uint8_t *d, int linesize,
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const uint8_t *font_ptr, int h,
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uint32_t fgcol, uint32_t bgcol)
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{
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uint32_t font_data, xorcol;
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xorcol = bgcol ^ fgcol;
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do {
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font_data = font_ptr[0];
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#if BPP == 1
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((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;
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((uint32_t *)d)[3] = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
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#elif BPP == 2
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((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;
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((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;
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((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;
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((uint32_t *)d)[3] = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;
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#else
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((uint32_t *)d)[0] = ((-(font_data >> 7)) & xorcol) ^ bgcol;
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((uint32_t *)d)[1] = ((-(font_data >> 6) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[2] = ((-(font_data >> 5) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[3] = ((-(font_data >> 4) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[4] = ((-(font_data >> 3) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[5] = ((-(font_data >> 2) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[6] = ((-(font_data >> 1) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[7] = ((-(font_data >> 0) & 1) & xorcol) ^ bgcol;
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#endif
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font_ptr += 4;
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d += linesize;
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} while (--h);
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}
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static void glue(vga_draw_glyph9_, DEPTH)(uint8_t *d, int linesize,
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const uint8_t *font_ptr, int h,
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uint32_t fgcol, uint32_t bgcol, int dup9)
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{
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uint32_t font_data, xorcol, v;
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xorcol = bgcol ^ fgcol;
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do {
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font_data = font_ptr[0];
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/* XXX: unaligned accesses are done */
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#if BPP == 1
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((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;
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v = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
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((uint32_t *)d)[3] = v;
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if (dup9)
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*(uint8_t *)(d + 8) = v >> (24 * (1 - BIG));
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else
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*(uint8_t *)(d + 8) = bgcol;
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#elif BPP == 2
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((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;
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((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;
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((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;
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v = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;
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((uint32_t *)d)[3] = v;
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if (dup9)
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*(uint16_t *)(d + 8) = v >> (16 * (1 - BIG));
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else
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*(uint16_t *)(d + 8) = bgcol;
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#else
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((uint32_t *)d)[0] = ((-(font_data >> 7)) & xorcol) ^ bgcol;
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((uint32_t *)d)[1] = ((-(font_data >> 6) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[2] = ((-(font_data >> 5) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[3] = ((-(font_data >> 4) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[4] = ((-(font_data >> 3) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[5] = ((-(font_data >> 2) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[6] = ((-(font_data >> 1) & 1) & xorcol) ^ bgcol;
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v = ((-(font_data >> 0) & 1) & xorcol) ^ bgcol;
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((uint32_t *)d)[7] = v;
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if (dup9)
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*(uint32_t *)(d + 8) = v;
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else
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*(uint32_t *)(d + 8) = bgcol;
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#endif
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font_ptr += 4;
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d += linesize;
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} while (--h);
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}
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/*
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* 4 color mode
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*/
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static void glue(vga_draw_line2_, DEPTH)(VGAState *s1, uint8_t *d,
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const uint8_t *s, int width)
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{
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uint32_t plane_mask, *palette, data, v;
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int x;
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palette = s1->last_palette;
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plane_mask = mask16[s1->ar[0x12] & 0xf];
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width >>= 3;
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for(x = 0; x < width; x++) {
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data = ((uint32_t *)s)[0];
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data &= plane_mask;
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v = expand2[GET_PLANE(data, 0)];
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v |= expand2[GET_PLANE(data, 2)] << 2;
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((PIXEL_TYPE *)d)[0] = palette[v >> 12];
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((PIXEL_TYPE *)d)[1] = palette[(v >> 8) & 0xf];
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((PIXEL_TYPE *)d)[2] = palette[(v >> 4) & 0xf];
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((PIXEL_TYPE *)d)[3] = palette[(v >> 0) & 0xf];
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v = expand2[GET_PLANE(data, 1)];
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v |= expand2[GET_PLANE(data, 3)] << 2;
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((PIXEL_TYPE *)d)[4] = palette[v >> 12];
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((PIXEL_TYPE *)d)[5] = palette[(v >> 8) & 0xf];
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((PIXEL_TYPE *)d)[6] = palette[(v >> 4) & 0xf];
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((PIXEL_TYPE *)d)[7] = palette[(v >> 0) & 0xf];
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d += BPP * 8;
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s += 4;
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}
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}
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/*
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* 16 color mode
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*/
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static void glue(vga_draw_line4_, DEPTH)(VGAState *s1, uint8_t *d,
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const uint8_t *s, int width)
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{
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uint32_t plane_mask, data, v, *palette;
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int x;
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palette = s1->last_palette;
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plane_mask = mask16[s1->ar[0x12] & 0xf];
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width >>= 3;
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for(x = 0; x < width; x++) {
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data = ((uint32_t *)s)[0];
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data &= plane_mask;
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v = expand4[GET_PLANE(data, 0)];
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v |= expand4[GET_PLANE(data, 1)] << 1;
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v |= expand4[GET_PLANE(data, 2)] << 2;
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v |= expand4[GET_PLANE(data, 3)] << 3;
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((PIXEL_TYPE *)d)[0] = palette[v >> 28];
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((PIXEL_TYPE *)d)[1] = palette[(v >> 24) & 0xf];
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((PIXEL_TYPE *)d)[2] = palette[(v >> 20) & 0xf];
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((PIXEL_TYPE *)d)[3] = palette[(v >> 16) & 0xf];
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((PIXEL_TYPE *)d)[4] = palette[(v >> 12) & 0xf];
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((PIXEL_TYPE *)d)[5] = palette[(v >> 8) & 0xf];
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((PIXEL_TYPE *)d)[6] = palette[(v >> 4) & 0xf];
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((PIXEL_TYPE *)d)[7] = palette[(v >> 0) & 0xf];
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d += BPP * 8;
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s += 4;
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}
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}
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/*
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* 256 color mode
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*
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* XXX: add plane_mask support (never used in standard VGA modes)
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*/
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static void glue(vga_draw_line8_, DEPTH)(VGAState *s1, uint8_t *d,
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const uint8_t *s, int width)
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{
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uint32_t *palette;
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int x;
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palette = s1->last_palette;
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width >>= 3;
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for(x = 0; x < width; x++) {
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((PIXEL_TYPE *)d)[0] = palette[s[0]];
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((PIXEL_TYPE *)d)[1] = palette[s[1]];
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((PIXEL_TYPE *)d)[2] = palette[s[2]];
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((PIXEL_TYPE *)d)[3] = palette[s[3]];
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((PIXEL_TYPE *)d)[4] = palette[s[4]];
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((PIXEL_TYPE *)d)[5] = palette[s[5]];
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((PIXEL_TYPE *)d)[6] = palette[s[6]];
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((PIXEL_TYPE *)d)[7] = palette[s[7]];
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d += BPP * 8;
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s += 8;
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}
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}
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#endif /* DEPTH != 15 */
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/* XXX: optimize */
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/*
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* 15 bit color
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*/
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static void glue(vga_draw_line15_, DEPTH)(VGAState *s1, uint8_t *d,
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const uint8_t *s, int width)
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{
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#if DEPTH == 15 && !defined(WORDS_BIGENDIAN)
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memcpy(d, s, width * 2);
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#else
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int w;
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uint32_t v, r, g, b;
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w = width;
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do {
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v = lduw((void *)s);
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r = (v >> 7) & 0xf8;
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g = (v >> 2) & 0xf8;
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b = (v << 3) & 0xf8;
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((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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s += 2;
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d += BPP;
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} while (--w != 0);
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#endif
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}
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/*
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* 16 bit color
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*/
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static void glue(vga_draw_line16_, DEPTH)(VGAState *s1, uint8_t *d,
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const uint8_t *s, int width)
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{
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#if DEPTH == 16 && !defined(WORDS_BIGENDIAN)
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memcpy(d, s, width * 2);
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#else
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int w;
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uint32_t v, r, g, b;
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w = width;
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do {
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v = lduw((void *)s);
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r = (v >> 8) & 0xf8;
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g = (v >> 3) & 0xfc;
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b = (v << 3) & 0xf8;
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((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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s += 2;
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d += BPP;
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} while (--w != 0);
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#endif
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}
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/*
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* 32 bit color
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*/
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static void glue(vga_draw_line32_, DEPTH)(VGAState *s1, uint8_t *d,
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const uint8_t *s, int width)
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{
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#if DEPTH == 32 && !defined(WORDS_BIGENDIAN)
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memcpy(d, s, width * 4);
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#else
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int w;
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uint32_t r, g, b;
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w = width;
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do {
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b = s[0];
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g = s[1];
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r = s[2];
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((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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s += 4;
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d += BPP;
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} while (--w != 0);
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#endif
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}
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#undef DEPTH
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#undef BPP
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#undef PIXEL_TYPE
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