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Commit e89f66ec authored by bellard's avatar bellard
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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
parent b6d78bfa
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hw/vga.c 0 → 100644
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hw/vga_template.h 0 → 100644
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/*
* QEMU VGA Emulator templates
*
* Copyright (c) 2003 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#if DEPTH == 8
#define BPP 1
#define PIXEL_TYPE uint8_t
#elif DEPTH == 15 || DEPTH == 16
#define BPP 2
#define PIXEL_TYPE uint16_t
#elif DEPTH == 32
#define BPP 4
#define PIXEL_TYPE uint32_t
#else
#error unsupport depth
#endif
#if DEPTH != 15
static void glue(vga_draw_glyph8_, DEPTH)(uint8_t *d, int linesize,
const uint8_t *font_ptr, int h,
uint32_t fgcol, uint32_t bgcol)
{
uint32_t font_data, xorcol;
xorcol = bgcol ^ fgcol;
do {
font_data = font_ptr[0];
#if BPP == 1
((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;
((uint32_t *)d)[3] = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
#elif BPP == 2
((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;
((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;
((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;
((uint32_t *)d)[3] = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;
#else
((uint32_t *)d)[0] = ((-(font_data >> 7)) & xorcol) ^ bgcol;
((uint32_t *)d)[1] = ((-(font_data >> 6) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[2] = ((-(font_data >> 5) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[3] = ((-(font_data >> 4) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[4] = ((-(font_data >> 3) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[5] = ((-(font_data >> 2) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[6] = ((-(font_data >> 1) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[7] = ((-(font_data >> 0) & 1) & xorcol) ^ bgcol;
#endif
font_ptr += 4;
d += linesize;
} while (--h);
}
static void glue(vga_draw_glyph9_, DEPTH)(uint8_t *d, int linesize,
const uint8_t *font_ptr, int h,
uint32_t fgcol, uint32_t bgcol, int dup9)
{
uint32_t font_data, xorcol, v;
xorcol = bgcol ^ fgcol;
do {
font_data = font_ptr[0];
/* XXX: unaligned accesses are done */
#if BPP == 1
((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;
v = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
((uint32_t *)d)[3] = v;
if (dup9)
*(uint8_t *)(d + 8) = v >> (24 * (1 - BIG));
else
*(uint8_t *)(d + 8) = bgcol;
#elif BPP == 2
((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;
((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;
((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;
v = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;
((uint32_t *)d)[3] = v;
if (dup9)
*(uint16_t *)(d + 8) = v >> (16 * (1 - BIG));
else
*(uint16_t *)(d + 8) = bgcol;
#else
((uint32_t *)d)[0] = ((-(font_data >> 7)) & xorcol) ^ bgcol;
((uint32_t *)d)[1] = ((-(font_data >> 6) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[2] = ((-(font_data >> 5) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[3] = ((-(font_data >> 4) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[4] = ((-(font_data >> 3) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[5] = ((-(font_data >> 2) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[6] = ((-(font_data >> 1) & 1) & xorcol) ^ bgcol;
v = ((-(font_data >> 0) & 1) & xorcol) ^ bgcol;
((uint32_t *)d)[7] = v;
if (dup9)
*(uint32_t *)(d + 8) = v;
else
*(uint32_t *)(d + 8) = bgcol;
#endif
font_ptr += 4;
d += linesize;
} while (--h);
}
/*
* 4 color mode
*/
static void glue(vga_draw_line2_, DEPTH)(VGAState *s1, uint8_t *d,
const uint8_t *s, int width)
{
uint32_t plane_mask, *palette, data, v;
int x;
palette = s1->last_palette;
plane_mask = mask16[s1->ar[0x12] & 0xf];
width >>= 3;
for(x = 0; x < width; x++) {
data = ((uint32_t *)s)[0];
data &= plane_mask;
v = expand2[GET_PLANE(data, 0)];
v |= expand2[GET_PLANE(data, 2)] << 2;
((PIXEL_TYPE *)d)[0] = palette[v >> 12];
((PIXEL_TYPE *)d)[1] = palette[(v >> 8) & 0xf];
((PIXEL_TYPE *)d)[2] = palette[(v >> 4) & 0xf];
((PIXEL_TYPE *)d)[3] = palette[(v >> 0) & 0xf];
v = expand2[GET_PLANE(data, 1)];
v |= expand2[GET_PLANE(data, 3)] << 2;
((PIXEL_TYPE *)d)[4] = palette[v >> 12];
((PIXEL_TYPE *)d)[5] = palette[(v >> 8) & 0xf];
((PIXEL_TYPE *)d)[6] = palette[(v >> 4) & 0xf];
((PIXEL_TYPE *)d)[7] = palette[(v >> 0) & 0xf];
d += BPP * 8;
s += 4;
}
}
/*
* 16 color mode
*/
static void glue(vga_draw_line4_, DEPTH)(VGAState *s1, uint8_t *d,
const uint8_t *s, int width)
{
uint32_t plane_mask, data, v, *palette;
int x;
palette = s1->last_palette;
plane_mask = mask16[s1->ar[0x12] & 0xf];
width >>= 3;
for(x = 0; x < width; x++) {
data = ((uint32_t *)s)[0];
data &= plane_mask;
v = expand4[GET_PLANE(data, 0)];
v |= expand4[GET_PLANE(data, 1)] << 1;
v |= expand4[GET_PLANE(data, 2)] << 2;
v |= expand4[GET_PLANE(data, 3)] << 3;
((PIXEL_TYPE *)d)[0] = palette[v >> 28];
((PIXEL_TYPE *)d)[1] = palette[(v >> 24) & 0xf];
((PIXEL_TYPE *)d)[2] = palette[(v >> 20) & 0xf];
((PIXEL_TYPE *)d)[3] = palette[(v >> 16) & 0xf];
((PIXEL_TYPE *)d)[4] = palette[(v >> 12) & 0xf];
((PIXEL_TYPE *)d)[5] = palette[(v >> 8) & 0xf];
((PIXEL_TYPE *)d)[6] = palette[(v >> 4) & 0xf];
((PIXEL_TYPE *)d)[7] = palette[(v >> 0) & 0xf];
d += BPP * 8;
s += 4;
}
}
/*
* 256 color mode
*
* XXX: add plane_mask support (never used in standard VGA modes)
*/
static void glue(vga_draw_line8_, DEPTH)(VGAState *s1, uint8_t *d,
const uint8_t *s, int width)
{
uint32_t *palette;
int x;
palette = s1->last_palette;
width >>= 3;
for(x = 0; x < width; x++) {
((PIXEL_TYPE *)d)[0] = palette[s[0]];
((PIXEL_TYPE *)d)[1] = palette[s[1]];
((PIXEL_TYPE *)d)[2] = palette[s[2]];
((PIXEL_TYPE *)d)[3] = palette[s[3]];
((PIXEL_TYPE *)d)[4] = palette[s[4]];
((PIXEL_TYPE *)d)[5] = palette[s[5]];
((PIXEL_TYPE *)d)[6] = palette[s[6]];
((PIXEL_TYPE *)d)[7] = palette[s[7]];
d += BPP * 8;
s += 8;
}
}
#endif /* DEPTH != 15 */
/* XXX: optimize */
/*
* 15 bit color
*/
static void glue(vga_draw_line15_, DEPTH)(VGAState *s1, uint8_t *d,
const uint8_t *s, int width)
{
#if DEPTH == 15 && !defined(WORDS_BIGENDIAN)
memcpy(d, s, width * 2);
#else
int w;
uint32_t v, r, g, b;
w = width;
do {
v = lduw((void *)s);
r = (v >> 7) & 0xf8;
g = (v >> 2) & 0xf8;
b = (v << 3) & 0xf8;
((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
s += 2;
d += BPP;
} while (--w != 0);
#endif
}
/*
* 16 bit color
*/
static void glue(vga_draw_line16_, DEPTH)(VGAState *s1, uint8_t *d,
const uint8_t *s, int width)
{
#if DEPTH == 16 && !defined(WORDS_BIGENDIAN)
memcpy(d, s, width * 2);
#else
int w;
uint32_t v, r, g, b;
w = width;
do {
v = lduw((void *)s);
r = (v >> 8) & 0xf8;
g = (v >> 3) & 0xfc;
b = (v << 3) & 0xf8;
((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
s += 2;
d += BPP;
} while (--w != 0);
#endif
}
/*
* 32 bit color
*/
static void glue(vga_draw_line32_, DEPTH)(VGAState *s1, uint8_t *d,
const uint8_t *s, int width)
{
#if DEPTH == 32 && !defined(WORDS_BIGENDIAN)
memcpy(d, s, width * 4);
#else
int w;
uint32_t r, g, b;
w = width;
do {
b = s[0];
g = s[1];
r = s[2];
((PIXEL_TYPE *)d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
s += 4;
d += BPP;
} while (--w != 0);
#endif
}
#undef DEPTH
#undef BPP
#undef PIXEL_TYPE
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