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drawing.cpp
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drawing.cpp
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//#define XLINECHECK
/*
* UAE - The Un*x Amiga Emulator
*
* Screen drawing functions
*
* Copyright 1995-2000 Bernd Schmidt
* Copyright 1995 Alessandro Bissacco
* Copyright 2000-2008 Toni Wilen
*/
/* There are a couple of concepts of "coordinates" in this file.
- DIW coordinates
- DDF coordinates (essentially cycles, resolution lower than lores by a factor of 2)
- Pixel coordinates
* in the Amiga's resolution as determined by BPLCON0 ("Amiga coordinates")
* in the window resolution as determined by the preferences ("window coordinates").
* in the window resolution, and with the origin being the topmost left corner of
the window ("native coordinates")
One note about window coordinates. The visible area depends on the width of the
window, and the centering code. The first visible horizontal window coordinate is
often _not_ 0, but the value of VISIBLE_LEFT_BORDER instead.
One important thing to remember: DIW coordinates are in the lowest possible
resolution.
To prevent extremely bad things (think pixels cut in half by window borders) from
happening, all ports should restrict window widths to be multiples of 16 pixels. */
#include "sysconfig.h"
#include "sysdeps.h"
#include <ctype.h>
#include <assert.h>
#include "options.h"
#include "threaddep/thread.h"
#include "uae.h"
#include "memory.h"
#include "custom.h"
#include "newcpu.h"
#include "xwin.h"
#include "autoconf.h"
#include "gui.h"
#include "picasso96.h"
#include "drawing.h"
#include "savestate.h"
#include "statusline.h"
#include "inputdevice.h"
#include "debug.h"
#include "cd32_fmv.h"
extern bool emulate_specialmonitors (struct vidbuffer*, struct vidbuffer*);
extern int sprite_buffer_res;
int lores_factor, lores_shift;
int debug_bpl_mask = 0xff, debug_bpl_mask_one;
static void lores_reset (void)
{
lores_factor = currprefs.gfx_resolution ? 2 : 1;
lores_shift = currprefs.gfx_resolution;
if (doublescan > 0) {
if (lores_shift < 2)
lores_shift++;
lores_factor = 2;
}
sprite_buffer_res = currprefs.gfx_resolution;
if (doublescan > 0 && sprite_buffer_res < RES_SUPERHIRES)
sprite_buffer_res++;
}
bool aga_mode; /* mirror of chipset_mask & CSMASK_AGA */
bool direct_rgb;
/* The shift factor to apply when converting between Amiga coordinates and window
coordinates. Zero if the resolution is the same, positive if window coordinates
have a higher resolution (i.e. we're stretching the image), negative if window
coordinates have a lower resolution (i.e. we're shrinking the image). */
static int res_shift;
static int linedbl, linedbld;
int interlace_seen = 0;
#define AUTO_LORES_FRAMES 10
static int can_use_lores = 0, frame_res, frame_res_lace;
static int resolution_count[RES_MAX + 1], lines_count;
static bool center_reset;
/* Lookup tables for dual playfields. The dblpf_*1 versions are for the case
that playfield 1 has the priority, dbplpf_*2 are used if playfield 2 has
priority. If we need an array for non-dual playfield mode, it has no number. */
/* The dbplpf_ms? arrays contain a shift value. plf_spritemask is initialized
to contain two 16 bit words, with the appropriate mask if pf1 is in the
foreground being at bit offset 0, the one used if pf2 is in front being at
offset 16. */
static int dblpf_ms1[256], dblpf_ms2[256], dblpf_ms[256];
static int dblpf_ind1[256], dblpf_ind2[256];
static int dblpf_2nd1[256], dblpf_2nd2[256];
static const int dblpfofs[] = { 0, 2, 4, 8, 16, 32, 64, 128 };
static int sprite_offs[256];
static uae_u32 clxtab[256];
/* Video buffer description structure. Filled in by the graphics system
* dependent code. */
struct vidbuf_description gfxvidinfo;
/* OCS/ECS color lookup table. */
xcolnr xcolors[4096];
struct spritepixelsbuf {
uae_u8 attach;
uae_u8 stdata;
uae_u16 data;
};
static struct spritepixelsbuf spritepixels[MAX_PIXELS_PER_LINE];
static int sprite_first_x, sprite_last_x;
#ifdef AGA
/* AGA mode color lookup tables */
unsigned int xredcolors[256], xgreencolors[256], xbluecolors[256];
static int dblpf_ind1_aga[256], dblpf_ind2_aga[256];
#else
static uae_u8 spriteagadpfpixels[1];
static int dblpf_ind1_aga[1], dblpf_ind2_aga[1];
#endif
int xredcolor_s, xredcolor_b, xredcolor_m;
int xgreencolor_s, xgreencolor_b, xgreencolor_m;
int xbluecolor_s, xbluecolor_b, xbluecolor_m;
struct color_entry colors_for_drawing;
/* The size of these arrays is pretty arbitrary; it was chosen to be "more
than enough". The coordinates used for indexing into these arrays are
almost, but not quite, Amiga coordinates (there's a constant offset). */
static union {
/* Let's try to align this thing. */
double uupzuq;
long int cruxmedo;
uae_u8 apixels[MAX_PIXELS_PER_LINE * 2];
uae_u16 apixels_w[MAX_PIXELS_PER_LINE * 2 / sizeof (uae_u16)];
uae_u32 apixels_l[MAX_PIXELS_PER_LINE * 2 / sizeof (uae_u32)];
} pixdata;
#ifdef OS_WITHOUT_MEMORY_MANAGEMENT
uae_u16 *spixels;
#else
uae_u16 spixels[2 * MAX_SPR_PIXELS];
#endif
/* Eight bits for every pixel. */
union sps_union spixstate;
static uae_u32 ham_linebuf[MAX_PIXELS_PER_LINE * 2];
static uae_u8 *real_bplpt[8];
static uae_u8 all_ones[MAX_PIXELS_PER_LINE];
static uae_u8 all_zeros[MAX_PIXELS_PER_LINE];
uae_u8 *xlinebuffer;
static int *amiga2aspect_line_map, *native2amiga_line_map;
static uae_u8 **row_map;
static uae_u8 row_tmp[MAX_PIXELS_PER_LINE * 32 / 8];
static int max_drawn_amiga_line;
/* line_draw_funcs: pfield_do_linetoscr, pfield_do_fill_line, decode_ham */
typedef void (*line_draw_func)(int, int, bool);
#define LINE_UNDECIDED 1
#define LINE_DECIDED 2
#define LINE_DECIDED_DOUBLE 3
#define LINE_AS_PREVIOUS 4
#define LINE_BLACK 5
#define LINE_REMEMBERED_AS_BLACK 6
#define LINE_DONE 7
#define LINE_DONE_AS_PREVIOUS 8
#define LINE_REMEMBERED_AS_PREVIOUS 9
#define LINESTATE_SIZE ((MAXVPOS + 2) * 2 + 1)
static uae_u8 linestate[LINESTATE_SIZE];
uae_u8 line_data[(MAXVPOS + 2) * 2][MAX_PLANES * MAX_WORDS_PER_LINE * 2];
/* Centering variables. */
static int min_diwstart, max_diwstop;
/* The visible window: VISIBLE_LEFT_BORDER contains the left border of the visible
area, VISIBLE_RIGHT_BORDER the right border. These are in window coordinates. */
int visible_left_border, visible_right_border;
/* Pixels outside of visible_start and visible_stop are always black */
static int visible_left_start, visible_right_stop;
static int visible_top_start, visible_bottom_stop;
/* same for hblank */
static int hblank_left_start, hblank_right_stop;
static int linetoscr_x_adjust_bytes;
static int thisframe_y_adjust;
static int thisframe_y_adjust_real, max_ypos_thisframe, min_ypos_for_screen;
int thisframe_first_drawn_line, thisframe_last_drawn_line;
/* A frame counter that forces a redraw after at least one skipped frame in
interlace mode. */
static int last_redraw_point;
#define MAX_STOP 30000
static int first_drawn_line, last_drawn_line;
static int first_block_line, last_block_line;
#define NO_BLOCK -3
/* These are generated by the drawing code from the line_decisions array for
each line that needs to be drawn. These are basically extracted out of
bit fields in the hardware registers. */
static int bplehb, bplham, bpldualpf, bpldualpfpri, bpldualpf2of, bplplanecnt, ecsshres;
static bool issprites;
static int bplres;
static int plf1pri, plf2pri, bplxor;
static uae_u32 plf_sprite_mask;
static int sbasecol[2] = { 16, 16 };
static int hposblank;
static bool specialmonitoron;
bool picasso_requested_on;
bool picasso_on;
uae_sem_t gui_sem;
int inhibit_frame;
int framecnt = 0;
static int frame_redraw_necessary;
static int picasso_redraw_necessary;
#ifdef XLINECHECK
static void xlinecheck (unsigned int start, unsigned int end)
{
unsigned int xstart = (unsigned int)xlinebuffer + start * gfxvidinfo.drawbuffer.pixbytes;
unsigned int xend = (unsigned int)xlinebuffer + end * gfxvidinfo.drawbuffer.pixbytes;
unsigned int end1 = (unsigned int)gfxvidinfo.drawbuffer.bufmem + gfxvidinfo.drawbuffer.rowbytes * gfxvidinfo.drawbuffer.height;
int min = linetoscr_x_adjust_bytes / gfxvidinfo.drawbuffer.pixbytes;
int ok = 1;
if (xstart >= gfxvidinfo.drawbuffer.emergmem && xstart < gfxvidinfo.drawbuffer.emergmem + 4096 * gfxvidinfo.drawbuffer.pixbytes &&
xend >= gfxvidinfo.drawbuffer.emergmem && xend < gfxvidinfo.drawbuffer.emergmem + 4096 * gfxvidinfo.drawbuffer.pixbytes)
return;
if (xstart < (unsigned int)gfxvidinfo.drawbuffer.bufmem || xend < (unsigned int)gfxvidinfo.drawbuffer.bufmem)
ok = 0;
if (xend > end1 || xstart >= end1)
ok = 0;
xstart -= (unsigned int)gfxvidinfo.drawbuffer.bufmem;
xend -= (unsigned int)gfxvidinfo.drawbuffer.bufmem;
if ((xstart % gfxvidinfo.drawbuffer.rowbytes) >= gfxvidinfo.drawbuffer.width * gfxvidinfo.drawbuffer.pixbytes)
ok = 0;
if ((xend % gfxvidinfo.drawbuffer.rowbytes) >= gfxvidinfo.drawbuffer.width * gfxvidinfo.drawbuffer.pixbytes)
ok = 0;
if (xstart >= xend)
ok = 0;
if (xend - xstart > gfxvidinfo.drawbuffer.width * gfxvidinfo.drawbuffer.pixbytes)
ok = 0;
if (!ok) {
write_log (_T("*** %d-%d (%dx%dx%d %d) %p\n"),
start - min, end - min, gfxvidinfo.drawbuffer.width, gfxvidinfo.drawbuffer.height,
gfxvidinfo.drawbuffer.pixbytes, gfxvidinfo.drawbuffer.rowbytes,
xlinebuffer);
}
}
#else
#define xlinecheck(start, end)
#endif
static void clearbuffer (struct vidbuffer *dst)
{
if (!dst->bufmem_allocated)
return;
uae_u8 *p = dst->bufmem_allocated;
for (int y = 0; y < dst->height_allocated; y++) {
memset (p, 0, dst->width_allocated * dst->pixbytes);
p += dst->rowbytes;
}
}
void reset_decision_table (void)
{
for (int i = 0; i < sizeof linestate / sizeof *linestate; i++) {
linestate[i] = LINE_UNDECIDED;
}
}
STATIC_INLINE void count_frame (void)
{
framecnt++;
if (framecnt >= currprefs.gfx_framerate)
framecnt = 0;
if (inhibit_frame)
framecnt = 1;
}
STATIC_INLINE int xshift (int x, int shift)
{
if (shift < 0)
return x >> (-shift);
else
return x << shift;
}
int coord_native_to_amiga_x (int x)
{
x += visible_left_border;
x = xshift (x, 1 - lores_shift);
return x + 2 * DISPLAY_LEFT_SHIFT - 2 * DIW_DDF_OFFSET;
}
int coord_native_to_amiga_y (int y)
{
return native2amiga_line_map[y] + thisframe_y_adjust - minfirstline;
}
STATIC_INLINE int res_shift_from_window (int x)
{
if (res_shift >= 0)
return x >> res_shift;
return x << -res_shift;
}
STATIC_INLINE int res_shift_from_amiga (int x)
{
if (res_shift >= 0)
return x >> res_shift;
return x << -res_shift;
}
void notice_screen_contents_lost (void)
{
picasso_redraw_necessary = 1;
frame_redraw_necessary = 2;
}
bool isnativevidbuf (void)
{
if (gfxvidinfo.outbuffer == NULL)
return false;
if (gfxvidinfo.outbuffer == &gfxvidinfo.drawbuffer)
return true;
return gfxvidinfo.outbuffer->nativepositioning;
}
extern int plffirstline_total, plflastline_total;
extern int first_planes_vpos, last_planes_vpos;
extern int diwfirstword_total, diwlastword_total;
extern int ddffirstword_total, ddflastword_total;
extern bool vertical_changed, horizontal_changed;
extern int firstword_bplcon1;
extern int lof_store;
#define MIN_DISPLAY_W 256
#define MIN_DISPLAY_H 192
#define MAX_DISPLAY_W 362
#define MAX_DISPLAY_H 283
static int gclow, gcloh, gclox, gcloy, gclorealh;
static int stored_left_start, stored_top_start, stored_width, stored_height;
void get_custom_topedge (int *xp, int *yp, bool max)
{
if (isnativevidbuf () && !max) {
int x, y;
x = visible_left_border + (DISPLAY_LEFT_SHIFT << currprefs.gfx_resolution);
y = minfirstline << currprefs.gfx_vresolution;
#if 0
int dbl1, dbl2;
dbl2 = dbl1 = currprefs.gfx_vresolution;
if (doublescan > 0 && interlace_seen <= 0) {
dbl1--;
dbl2--;
}
x = -(visible_left_border + (DISPLAY_LEFT_SHIFT << currprefs.gfx_resolution));
y = -minfirstline << currprefs.gfx_vresolution;
y = xshift (y, dbl2);
#endif
*xp = x;
*yp = y;
} else {
*xp = 0;
*yp = 0;
}
}
static void reset_custom_limits (void)
{
gclow = gcloh = gclox = gcloy = 0;
gclorealh = -1;
center_reset = true;
}
static void set_blanking_limits (void)
{
hblank_left_start = visible_left_start;
hblank_right_stop = visible_right_stop;
if (programmedmode) {
if (hblank_left_start < coord_hw_to_window_x (hsyncendpos * 2))
hblank_left_start = coord_hw_to_window_x (hsyncendpos * 2);
if (hblank_right_stop > coord_hw_to_window_x (hsyncstartpos * 2))
hblank_right_stop = coord_hw_to_window_x (hsyncstartpos * 2);
}
}
void get_custom_raw_limits (int *pw, int *ph, int *pdx, int *pdy)
{
if (stored_width > 0) {
*pw = stored_width;
*ph = stored_height;
*pdx = stored_left_start;
*pdy = stored_top_start;
} else {
int x = visible_left_border;
if (x < visible_left_start)
x = visible_left_start;
*pdx = x;
int x2 = visible_right_border;
if (x2 > visible_right_stop)
x2 = visible_right_stop;
*pw = x2 - x;
int y = min_ypos_for_screen;
if (y < visible_top_start)
y = visible_top_start;
*pdy = y;
int y2 = max_ypos_thisframe;
if (y2 > visible_bottom_stop)
y2 = visible_bottom_stop;
*ph = y2 - y;
}
}
void set_custom_limits (int w, int h, int dx, int dy)
{
int vls = visible_left_start;
int vrs = visible_right_stop;
int vts = visible_top_start;
int vbs = visible_bottom_stop;
if (w <= 0 || dx < 0) {
visible_left_start = 0;
visible_right_stop = MAX_STOP;
} else {
visible_left_start = visible_left_border + dx;
visible_right_stop = visible_left_start + w;
}
if (h <= 0 || dy < 0) {
visible_top_start = 0;
visible_bottom_stop = MAX_STOP;
} else {
visible_top_start = min_ypos_for_screen + dy;
visible_bottom_stop = visible_top_start + h;
}
if (vls != visible_left_start || vrs != visible_right_stop ||
vts != visible_top_start || vbs != visible_bottom_stop)
notice_screen_contents_lost ();
set_blanking_limits ();
}
void store_custom_limits (int w, int h, int x, int y)
{
stored_left_start = x;
stored_top_start = y;
stored_width = w;
stored_height = h;
#if 0
write_log (_T("%dx%d %dx%d %dx%d %dx%d %d\n"), x, y, w, h,
currprefs.gfx_xcenter_pos,
currprefs.gfx_ycenter_pos,
currprefs.gfx_xcenter_size,
currprefs.gfx_ycenter_size,
currprefs.gfx_filter_autoscale);
#endif
}
int get_custom_limits (int *pw, int *ph, int *pdx, int *pdy, int *prealh)
{
int w, h, dx, dy, y1, y2, dbl1, dbl2;
int ret = 0;
if (!pw || !ph || !pdx || !pdy) {
reset_custom_limits ();
return 0;
}
if (!isnativevidbuf ()) {
*pw = gfxvidinfo.outbuffer->outwidth;
*ph = gfxvidinfo.outbuffer->outheight;
*pdx = 0;
*pdy = 0;
*prealh = -1;
return 1;
}
*pw = gclow;
*ph = gcloh;
*pdx = gclox;
*pdy = gcloy;
*prealh = gclorealh;
if (gclow > 0 && gcloh > 0)
ret = -1;
if (interlace_seen) {
static int interlace_count;
// interlace = only use long frames
if (lof_store && (interlace_count & 1) == 0)
interlace_count++;
if (!lof_store && (interlace_count & 1) != 0)
interlace_count++;
if (interlace_count < 3)
return ret;
if (!lof_store)
return ret;
interlace_count = 0;
/* program may have set last visible line as last possible line (CD32 boot screen) */
if (last_planes_vpos < maxvpos)
last_planes_vpos++;
if (plflastline_total < maxvpos)
plflastline_total++;
}
if (plflastline_total < 4)
plflastline_total = last_planes_vpos;
ddffirstword_total = coord_hw_to_window_x (ddffirstword_total * 2 + DIW_DDF_OFFSET);
ddflastword_total = coord_hw_to_window_x (ddflastword_total * 2 + DIW_DDF_OFFSET);
if (doublescan <= 0 && !programmedmode) {
int min = coord_diw_to_window_x (92);
int max = coord_diw_to_window_x (460);
if (diwfirstword_total < min)
diwfirstword_total = min;
if (diwlastword_total > max)
diwlastword_total = max;
if (ddffirstword_total < min)
ddffirstword_total = min;
if (ddflastword_total > max)
ddflastword_total = max;
if (0 && !(currprefs.chipset_mask & CSMASK_AGA)) {
if (ddffirstword_total > diwfirstword_total)
diwfirstword_total = ddffirstword_total;
if (ddflastword_total < diwlastword_total)
diwlastword_total = ddflastword_total;
}
}
w = diwlastword_total - diwfirstword_total;
dx = diwfirstword_total - visible_left_border;
y2 = plflastline_total;
if (y2 > last_planes_vpos)
y2 = last_planes_vpos;
y1 = plffirstline_total;
if (first_planes_vpos > y1)
y1 = first_planes_vpos;
if (minfirstline > y1)
y1 = minfirstline;
dbl2 = dbl1 = currprefs.gfx_vresolution;
if (doublescan > 0 && interlace_seen <= 0) {
dbl1--;
dbl2--;
}
h = y2 - y1;
dy = y1 - minfirstline;
if (first_planes_vpos == 0) {
// no planes enabled during frame
if (ret < 0)
return 1;
h = currprefs.ntscmode ? 200 : 240;
w = 320 << currprefs.gfx_resolution;
dy = 36 / 2;
dx = 58;
}
if (dx < 0)
dx = 0;
*prealh = -1;
if (!programmedmode && first_planes_vpos) {
int th = (maxvpos - minfirstline) * 95 / 100;
if (th > h) {
th = xshift (th, dbl1);
*prealh = th;
}
}
dy = xshift (dy, dbl2);
h = xshift (h, dbl1);
if (w == 0 || h == 0)
return 0;
if (doublescan <= 0 && !programmedmode) {
if ((w >> currprefs.gfx_resolution) < MIN_DISPLAY_W) {
dx += (w - (MIN_DISPLAY_W << currprefs.gfx_resolution)) / 2;
w = MIN_DISPLAY_W << currprefs.gfx_resolution;
}
if ((h >> dbl1) < MIN_DISPLAY_H) {
dy += (h - (MIN_DISPLAY_H << dbl1)) / 2;
h = MIN_DISPLAY_H << dbl1;
}
if ((w >> currprefs.gfx_resolution) > MAX_DISPLAY_W) {
dx += (w - (MAX_DISPLAY_W << currprefs.gfx_resolution)) / 2;
w = MAX_DISPLAY_W << currprefs.gfx_resolution;
}
if ((h >> dbl1) > MAX_DISPLAY_H) {
dy += (h - (MAX_DISPLAY_H << dbl1)) / 2;
h = MAX_DISPLAY_H << dbl1;
}
}
if (gclow == w && gcloh == h && gclox == dx && gcloy == dy)
return ret;
if (w <= 0 || h <= 0 || dx < 0 || dy < 0)
return ret;
if (doublescan <= 0 && !programmedmode) {
if (dx > gfxvidinfo.outbuffer->inwidth / 3)
return ret;
if (dy > gfxvidinfo.outbuffer->inheight / 3)
return ret;
}
gclow = w;
gcloh = h;
gclox = dx;
gcloy = dy;
gclorealh = *prealh;
*pw = w;
*ph = h;
*pdx = dx;
*pdy = dy;
#if 1
write_log (_T("Display Size: %dx%d Offset: %dx%d\n"), w, h, dx, dy);
write_log (_T("First: %d Last: %d MinV: %d MaxV: %d Min: %d\n"),
plffirstline_total, plflastline_total,
first_planes_vpos, last_planes_vpos, minfirstline);
#endif
center_reset = true;
return 1;
}
void get_custom_mouse_limits (int *pw, int *ph, int *pdx, int *pdy, int dbl)
{
int delay1, delay2;
int w, h, dx, dy, dbl1, dbl2, y1, y2;
w = diwlastword_total - diwfirstword_total;
dx = diwfirstword_total - visible_left_border;
y2 = plflastline_total;
if (y2 > last_planes_vpos)
y2 = last_planes_vpos;
y1 = plffirstline_total;
if (first_planes_vpos > y1)
y1 = first_planes_vpos;
if (minfirstline > y1)
y1 = minfirstline;
h = y2 - y1;
dy = y1 - minfirstline;
if (*pw > 0)
w = *pw;
w = xshift (w, res_shift);
if (*ph > 0)
h = *ph;
delay1 = (firstword_bplcon1 & 0x0f) | ((firstword_bplcon1 & 0x0c00) >> 6);
delay2 = ((firstword_bplcon1 >> 4) & 0x0f) | (((firstword_bplcon1 >> 4) & 0x0c00) >> 6);
// if (delay1 == delay2)
// dx += delay1;
dx = xshift (dx, res_shift);
dbl2 = dbl1 = currprefs.gfx_vresolution;
if ((doublescan > 0 || interlace_seen > 0) && !dbl) {
dbl1--;
dbl2--;
}
if (interlace_seen > 0)
dbl2++;
if (interlace_seen <= 0 && dbl)
dbl2--;
h = xshift (h, dbl1);
dy = xshift (dy, dbl2);
if (w < 1)
w = 1;
if (h < 1)
h = 1;
if (dx < 0)
dx = 0;
if (dy < 0)
dy = 0;
*pw = w; *ph = h;
*pdx = dx; *pdy = dy;
}
static struct decision *dp_for_drawing;
static struct draw_info *dip_for_drawing;
/* Record DIW of the current line for use by centering code. */
void record_diw_line (int plfstrt, int first, int last)
{
if (last > max_diwstop)
max_diwstop = last;
if (first < min_diwstart) {
min_diwstart = first;
/*
if (plfstrt * 2 > min_diwstart)
min_diwstart = plfstrt * 2;
*/
}
}
/*
* Screen update macros/functions
*/
/* The important positions in the line: where do we start drawing the left border,
where do we start drawing the playfield, where do we start drawing the right border.
All of these are forced into the visible window (VISIBLE_LEFT_BORDER .. VISIBLE_RIGHT_BORDER).
PLAYFIELD_START and PLAYFIELD_END are in window coordinates. */
static int playfield_start, playfield_end;
static int real_playfield_start, real_playfield_end;
static int sprite_playfield_start;
static bool may_require_hard_way;
static int linetoscr_diw_start, linetoscr_diw_end;
static int native_ddf_left, native_ddf_right;
static int pixels_offset;
static int src_pixel;
/* How many pixels in window coordinates which are to the left of the left border. */
static int unpainted;
STATIC_INLINE xcolnr getbgc (bool blank)
{
#if 0
if (blank)
return xcolors[0x088];
else if (hposblank == 1)
return xcolors[0xf00];
else if (hposblank == 2)
return xcolors[0x0f0];
else if (hposblank == 3)
return xcolors[0x00f];
else if (colors_for_drawing.borderblank)
return xcolors[0x880];
//return colors_for_drawing.acolors[0];
return xcolors[0xf0f];
#endif
return (blank || hposblank || colors_for_drawing.borderblank) ? 0 : colors_for_drawing.acolors[0];
}
/* Initialize the variables necessary for drawing a line.
* This involves setting up start/stop positions and display window
* borders. */
static void pfield_init_linetoscr (bool border)
{
/* First, get data fetch start/stop in DIW coordinates. */
int ddf_left = dp_for_drawing->plfleft * 2 + DIW_DDF_OFFSET;
int ddf_right = dp_for_drawing->plfright * 2 + DIW_DDF_OFFSET;
int leftborderhidden;
int native_ddf_left2;
if (border)
ddf_left = DISPLAY_LEFT_SHIFT;
/* Compute datafetch start/stop in pixels; native display coordinates. */
native_ddf_left = coord_hw_to_window_x (ddf_left);
native_ddf_right = coord_hw_to_window_x (ddf_right);
// Blerkenwiegel/Scoopex workaround
native_ddf_left2 = native_ddf_left;
if (native_ddf_left < 0)
native_ddf_left = 0;
if (native_ddf_right < native_ddf_left)
native_ddf_right = native_ddf_left;
linetoscr_diw_start = dp_for_drawing->diwfirstword;
linetoscr_diw_end = dp_for_drawing->diwlastword;
/* Perverse cases happen. */
if (linetoscr_diw_end < linetoscr_diw_start)
linetoscr_diw_end = linetoscr_diw_start;
res_shift = lores_shift - bplres;
playfield_start = linetoscr_diw_start;
playfield_end = linetoscr_diw_end;
if (playfield_start < native_ddf_left)
playfield_start = native_ddf_left;
if (playfield_end > native_ddf_right)
playfield_end = native_ddf_right;
if (playfield_start < visible_left_border)
playfield_start = visible_left_border;
if (playfield_start > visible_right_border)
playfield_start = visible_right_border;
if (playfield_end < visible_left_border)
playfield_end = visible_left_border;
if (playfield_end > visible_right_border)
playfield_end = visible_right_border;
real_playfield_start = playfield_start;
sprite_playfield_start = playfield_start;
real_playfield_end = playfield_end;
// Sprite hpos don't include DIW_DDF_OFFSET and can appear 1 lores pixel
// before first bitplane pixel appears.
// This means "bordersprite" condition is possible under OCS/ECS too. Argh!
if (dip_for_drawing->nr_sprites) {
if (!colors_for_drawing.borderblank) {
/* bordersprite off or not supported: sprites are visible until diw_end */
if (playfield_end < linetoscr_diw_end && hblank_right_stop > playfield_end) {
playfield_end = linetoscr_diw_end;
}
int left = coord_hw_to_window_x (dp_for_drawing->plfleft * 2);
if (left < visible_left_border)
left = visible_left_border;
if (left < playfield_start && left >= linetoscr_diw_start) {
playfield_start = left;
}
} else {
sprite_playfield_start = 0;
if (playfield_end < linetoscr_diw_end && hblank_right_stop > playfield_end) {
playfield_end = linetoscr_diw_end;
}
}
}
#ifdef AGA
may_require_hard_way = false;
if (dp_for_drawing->bordersprite_seen && !colors_for_drawing.borderblank && dip_for_drawing->nr_sprites) {
int min = visible_right_border, max = visible_left_border, i;
for (i = 0; i < dip_for_drawing->nr_sprites; i++) {
int x;
x = curr_sprite_entries[dip_for_drawing->first_sprite_entry + i].pos;
if (x < min)
min = x;
// include max extra pixels, sprite may be 2x or 4x size: 4x - 1.
x = curr_sprite_entries[dip_for_drawing->first_sprite_entry + i].max + (4 - 1);
if (x > max)
max = x;
}
min = coord_hw_to_window_x (min >> sprite_buffer_res) + (DIW_DDF_OFFSET << lores_shift);
max = coord_hw_to_window_x (max >> sprite_buffer_res) + (DIW_DDF_OFFSET << lores_shift);
if (min < playfield_start)
playfield_start = min;
if (playfield_start < visible_left_border)
playfield_start = visible_left_border;
if (max > playfield_end)
playfield_end = max;
if (playfield_end > visible_right_border)
playfield_end = visible_right_border;
sprite_playfield_start = 0;
may_require_hard_way = true;
}
#endif
unpainted = visible_left_border < playfield_start ? 0 : visible_left_border - playfield_start;
unpainted = res_shift_from_window (unpainted);
int first_x = sprite_first_x;
int last_x = sprite_last_x;
if (first_x < last_x) {
if (dp_for_drawing->bordersprite_seen && !colors_for_drawing.borderblank) {
if (first_x > visible_left_border)
first_x = visible_left_border;
if (last_x < visible_right_border)
last_x = visible_right_border;
}
if (first_x < 0)
first_x = 0;
if (last_x > MAX_PIXELS_PER_LINE - 2)
last_x = MAX_PIXELS_PER_LINE - 2;
if (first_x < last_x)
memset (spritepixels + first_x, 0, sizeof (struct spritepixelsbuf) * (last_x - first_x + 1));
}
sprite_last_x = 0;
sprite_first_x = MAX_PIXELS_PER_LINE - 1;
/* Now, compute some offsets. */
ddf_left -= DISPLAY_LEFT_SHIFT;
pixels_offset = MAX_PIXELS_PER_LINE - (ddf_left << bplres);
ddf_left <<= bplres;
leftborderhidden = playfield_start - native_ddf_left2;
if (hblank_left_start > playfield_start)
leftborderhidden += hblank_left_start - playfield_start;
src_pixel = MAX_PIXELS_PER_LINE + res_shift_from_window (leftborderhidden);
if (dip_for_drawing->nr_sprites == 0)
return;
/* We need to clear parts of apixels. */
if (linetoscr_diw_start < native_ddf_left) {
int size = res_shift_from_window (native_ddf_left - linetoscr_diw_start);
linetoscr_diw_start = native_ddf_left;
memset (pixdata.apixels + MAX_PIXELS_PER_LINE - size, 0, size);
}
if (linetoscr_diw_end > native_ddf_right) {
int pos = res_shift_from_window (native_ddf_right - native_ddf_left);
int size = res_shift_from_window (linetoscr_diw_end - native_ddf_right);
linetoscr_diw_start = native_ddf_left;
memset (pixdata.apixels + MAX_PIXELS_PER_LINE + pos, 0, size);
}
}
// erase sprite graphics in pixdata if they were outside of ddf
static void pfield_erase_hborder_sprites (void)
{
if (sprite_first_x < native_ddf_left) {
int size = res_shift_from_window (native_ddf_left - sprite_first_x);
memset (pixdata.apixels + MAX_PIXELS_PER_LINE - size, 0, size);
}
if (sprite_last_x > native_ddf_right) {
int pos = res_shift_from_window (native_ddf_right - native_ddf_left);
int size = res_shift_from_window (sprite_last_x - native_ddf_right);
memset (pixdata.apixels + MAX_PIXELS_PER_LINE + pos, 0, size);
}
}
// erase whole viewable area if sprite in upper or lower border
static void pfield_erase_vborder_sprites (void)
{
if (visible_right_border <= visible_left_border)
return;
int pos = 0;
int size = 0;
if (visible_left_border < native_ddf_left) {
size = res_shift_from_window (native_ddf_left - visible_left_border);
pos = -size;
}
if (visible_right_border > native_ddf_left)
size += res_shift_from_window (visible_right_border - native_ddf_left);
memset (pixdata.apixels + MAX_PIXELS_PER_LINE - pos, 0, size);
}
STATIC_INLINE uae_u16 merge_2pixel16 (uae_u16 p1, uae_u16 p2)
{
uae_u16 v = ((((p1 >> xredcolor_s) & xredcolor_m) + ((p2 >> xredcolor_s) & xredcolor_m)) / 2) << xredcolor_s;
v |= ((((p1 >> xbluecolor_s) & xbluecolor_m) + ((p2 >> xbluecolor_s) & xbluecolor_m)) / 2) << xbluecolor_s;
v |= ((((p1 >> xgreencolor_s) & xgreencolor_m) + ((p2 >> xgreencolor_s) & xgreencolor_m)) / 2) << xgreencolor_s;
return v;
}
STATIC_INLINE uae_u32 merge_2pixel32 (uae_u32 p1, uae_u32 p2)
{
uae_u32 v = ((((p1 >> 16) & 0xff) + ((p2 >> 16) & 0xff)) / 2) << 16;
v |= ((((p1 >> 8) & 0xff) + ((p2 >> 8) & 0xff)) / 2) << 8;
v |= ((((p1 >> 0) & 0xff) + ((p2 >> 0) & 0xff)) / 2) << 0;
return v;
}
STATIC_INLINE void fill_line_16 (uae_u8 *buf, int start, int stop, bool blank)
{
uae_u16 *b = (uae_u16 *)buf;
unsigned int i;
unsigned int rem = 0;
xcolnr col = getbgc (blank);
if (((long)&b[start]) & 1)
b[start++] = (uae_u16) col;
if (start >= stop)
return;
if (((long)&b[stop]) & 1) {
rem++;
stop--;
}
for (i = start; i < stop; i += 2) {
uae_u32 *b2 = (uae_u32 *)&b[i];
*b2 = col;
}
if (rem)
b[stop] = (uae_u16)col;
}