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Voodoo Banshee: added basic screen-to-screen stretching support (using nearest

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source pixel).
This commit is contained in:
Volker Ruppert 2018-01-06 17:27:55 +00:00
parent 7f321d0c20
commit 23df53aae5
2 changed files with 87 additions and 1 deletions
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87
bochs/iodev/display/banshee.cc
View File

@ -1263,7 +1263,12 @@ void bx_banshee_c::blt_execute()
}
break;
case 2:
BX_INFO(("TODO: 2D Screen to screen stretch blt"));
if (BLT.rop_flags[BLT.rop0] & BX_ROP_PATTERN) {
BX_INFO(("TODO: 2D Screen to screen stretch pattern blt"));
} else {
BLT.busy = 1;
blt_screen_to_screen_stretch();
}
break;
case 3:
if (!BLT.immed) {
@ -1752,6 +1757,86 @@ void bx_banshee_c::blt_screen_to_screen_pattern()
BX_UNLOCK(render_mutex);
}
void bx_banshee_c::blt_screen_to_screen_stretch()
{
Bit8u *src_ptr = &v->fbi.ram[BLT.src_base];
Bit8u *dst_ptr = &v->fbi.ram[BLT.dst_base];
Bit8u *src_ptr1, *dst_ptr1;
Bit8u dpxsize = (BLT.dst_fmt > 1) ? (BLT.dst_fmt - 1) : 1;
int spitch;
int dpitch = BLT.dst_pitch;
int nrows, ncols, stepx, stepy;
int x0, x1, x2, x3, y0, y1, y2, y3, w0, h0, w1, h1;
double fx, fy;
BX_LOCK(render_mutex);
x1 = BLT.dst_x;
y1 = BLT.dst_y;
w0 = BLT.src_w;
h0 = BLT.src_h;
w1 = BLT.dst_w;
h1 = BLT.dst_h;
BX_DEBUG(("Screen to screen stretch blt: : %d x %d -> %d x %d ROP %02X",
w0, h0, w1, h1, BLT.rop0));
if (BLT.dst_fmt != BLT.src_fmt) {
BX_ERROR(("Pixel format conversion not supported yet"));
}
if (!blt_apply_clipwindow(NULL, NULL, &x1, &y1, &w1, &h1)) {
BLT.busy = 0;
BX_UNLOCK(render_mutex);
return;
}
if (BLT.src_tiled) {
spitch = BLT.src_pitch * 128;
} else {
spitch = BLT.src_pitch;
}
if (BLT.x_dir) {
stepx = -1;
x0 = BLT.src_x - BLT.src_w + 1;
} else {
stepx = 1;
x0 = BLT.src_x;
}
if (BLT.y_dir) {
spitch *= -1;
dpitch *= -1;
stepy = -1;
y0 = BLT.src_y - BLT.src_h + 1;
y2 = y1 - (BLT.dst_y - BLT.dst_h + 1);
} else {
stepy = 1;
y0 = BLT.src_y;
y2 = y1 - BLT.dst_y;
}
fx = (double)(w1 - 1) / (double)(w0 - 1);
fy = (double)(h1 - 1) / (double)(h0 - 1);
src_ptr += (y0 * abs(spitch) + x0 * dpxsize);
dst_ptr += (y1 * abs(dpitch) + x1 * dpxsize);
nrows = h1;
do {
dst_ptr1 = dst_ptr;
ncols = w1;
if (BLT.x_dir) {
x2 = x1 - (BLT.dst_x - BLT.dst_w + 1);
} else {
x2 = x1 - BLT.dst_x;
}
do {
x3 = (int)((double)x2 / fx + 0.5f);
y3 = (int)((double)y2 / fy + 0.5f);
src_ptr1 = src_ptr + (y3 * abs(spitch) + x3 * dpxsize);
BLT.rop_fn(dst_ptr1, src_ptr1, dpitch, dpxsize, dpxsize, 1);
dst_ptr1 += dpxsize;
x2 += stepx;
} while (--ncols);
dst_ptr += dpitch;
y2 += stepy;
} while (--nrows);
blt_complete();
BX_UNLOCK(render_mutex);
}
void bx_banshee_c::blt_host_to_screen()
{
Bit32u dpitch = BLT.dst_pitch;

1
bochs/iodev/display/voodoo.h
View File

@ -162,6 +162,7 @@ private:
void blt_pattern_fill_color(void);
void blt_screen_to_screen(void);
void blt_screen_to_screen_pattern(void);
void blt_screen_to_screen_stretch(void);
void blt_host_to_screen(void);
void blt_host_to_screen_pattern(void);
void blt_line(bx_bool pline);