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goma / wine / 96d7fac2969b065a5aaaa4d7b35f0c2374d5057a / . / dlls / gdi32 / dibdrv / objects.c
blob: 4712dc180e69be95e489367d4716982ea9592346 [file] [log] [blame]
/*
* DIB driver GDI objects.
*
* Copyright 2011 Huw Davies
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include <stdlib.h>
#include "gdi_private.h"
#include "dibdrv.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(dib);
/*
*
* Decompose the 16 ROP2s into an expression of the form
*
* D = (D & A) ^ X
*
* Where A and X depend only on P (and so can be precomputed).
*
* A X
*
* R2_BLACK 0 0 0
* R2_NOTMERGEPEN ~(D | P) ~P ~P
* R2_MASKNOTPEN ~P & D ~P 0
* R2_NOTCOPYPEN ~P 0 ~P
* R2_MASKPENNOT P & ~D P P
* R2_NOT ~D 1 1
* R2_XORPEN P ^ D 1 P
* R2_NOTMASKPEN ~(P & D) P 1
* R2_MASKPEN P & D P 0
* R2_NOTXORPEN ~(P ^ D) 1 ~P
* R2_NOP D 1 0
* R2_MERGENOTPEN ~P | D P ~P
* R2_COPYPEN P 0 P
* R2_MERGEPENNOT P | ~D ~P 1
* R2_MERGEPEN P | D ~P P
* R2_WHITE 1 0 1
*
*/
/* A = (P & A1) ^ A2 */
#define ZERO { 0u, 0u}
#define ONE { 0u, ~0u}
#define P {~0u, 0u}
#define NOT_P {~0u, ~0u}
static const DWORD rop2_and_array[16][2] =
{
ZERO, NOT_P, NOT_P, ZERO,
P, ONE, ONE, P,
P, ONE, ONE, P,
ZERO, NOT_P, NOT_P, ZERO
};
/* X = (P & X1) ^ X2 */
static const DWORD rop2_xor_array[16][2] =
{
ZERO, NOT_P, ZERO, NOT_P,
P, ONE, P, ONE,
ZERO, NOT_P, ZERO, NOT_P,
P, ONE, P, ONE
};
#undef NOT_P
#undef P
#undef ONE
#undef ZERO
void get_rop_codes(INT rop, struct rop_codes *codes)
{
/* NB The ROP2 codes start at one and the arrays are zero-based */
codes->a1 = rop2_and_array[rop-1][0];
codes->a2 = rop2_and_array[rop-1][1];
codes->x1 = rop2_xor_array[rop-1][0];
codes->x2 = rop2_xor_array[rop-1][1];
}
static inline void calc_and_xor_masks(INT rop, DWORD color, DWORD *and, DWORD *xor)
{
struct rop_codes codes;
get_rop_codes( rop, &codes );
*and = (color & codes.a1) ^ codes.a2;
*xor = (color & codes.x1) ^ codes.x2;
}
static inline void calc_rop_masks(INT rop, DWORD color, rop_mask *masks)
{
calc_and_xor_masks( rop, color, &masks->and, &masks->xor );
}
static inline RGBQUAD rgbquad_from_colorref(COLORREF c)
{
RGBQUAD ret;
ret.rgbRed = GetRValue(c);
ret.rgbGreen = GetGValue(c);
ret.rgbBlue = GetBValue(c);
ret.rgbReserved = 0;
return ret;
}
static inline BOOL rgbquad_equal(const RGBQUAD *a, const RGBQUAD *b)
{
if(a->rgbRed == b->rgbRed &&
a->rgbGreen == b->rgbGreen &&
a->rgbBlue == b->rgbBlue)
return TRUE;
return FALSE;
}
COLORREF make_rgb_colorref( HDC hdc, dib_info *dib, COLORREF color, BOOL *got_pixel, DWORD *pixel )
{
*pixel = 0;
*got_pixel = FALSE;
if (color & (1 << 24)) /* PALETTEINDEX */
{
HPALETTE pal = GetCurrentObject( hdc, OBJ_PAL );
PALETTEENTRY pal_ent;
if (!GetPaletteEntries( pal, LOWORD(color), 1, &pal_ent ))
GetPaletteEntries( pal, 0, 1, &pal_ent );
return RGB( pal_ent.peRed, pal_ent.peGreen, pal_ent.peBlue );
}
if (color >> 16 == 0x10ff) /* DIBINDEX */
{
const RGBQUAD *color_table = get_dib_color_table( dib );
WORD index = LOWORD( color );
*got_pixel = TRUE;
if (!color_table || index >= (1 << dib->bit_count)) return 0;
*pixel = index;
return RGB( color_table[index].rgbRed, color_table[index].rgbGreen, color_table[index].rgbBlue );
}
return color & 0xffffff;
}
/******************************************************************
* get_pixel_color
*
* 1 bit bitmaps map the fg/bg colors as follows:
* If the fg colorref exactly matches one of the color table entries then
* that entry is the fg color and the other is the bg.
* Otherwise the bg color is mapped to the closest entry in the table and
* the fg takes the other one.
*/
DWORD get_pixel_color( dibdrv_physdev *pdev, COLORREF color, BOOL mono_fixup )
{
RGBQUAD fg_quad;
BOOL got_pixel;
DWORD pixel;
COLORREF rgb_ref;
const RGBQUAD *color_table;
rgb_ref = make_rgb_colorref( pdev->dev.hdc, &pdev->dib, color, &got_pixel, &pixel );
if (got_pixel) return pixel;
if (pdev->dib.bit_count != 1 || !mono_fixup)
return pdev->dib.funcs->colorref_to_pixel( &pdev->dib, rgb_ref );
color_table = get_dib_color_table( &pdev->dib );
fg_quad = rgbquad_from_colorref( rgb_ref );
if(rgbquad_equal(&fg_quad, color_table))
return 0;
if(rgbquad_equal(&fg_quad, color_table + 1))
return 1;
pixel = get_pixel_color( pdev, GetBkColor(pdev->dev.hdc), FALSE );
if (color == GetBkColor(pdev->dev.hdc)) return pixel;
else return !pixel;
}
/***************************************************************************
* get_color_masks
*
* Returns the color masks unless the dib is 1 bpp. In this case since
* there are several fg sources (pen, brush, text) we take as bg the inverse
* of the relevant fg color (which is always set up correctly).
*/
static inline void get_color_masks( dibdrv_physdev *pdev, UINT rop, COLORREF colorref,
INT bkgnd_mode, rop_mask *fg_mask, rop_mask *bg_mask )
{
DWORD color = get_pixel_color( pdev, colorref, TRUE );
calc_rop_masks( rop, color, fg_mask );
if (bkgnd_mode == TRANSPARENT)
{
bg_mask->and = ~0u;
bg_mask->xor = 0;
return;
}
if (pdev->dib.bit_count != 1) color = get_pixel_color( pdev, GetBkColor(pdev->dev.hdc), FALSE );
else if (colorref != GetBkColor(pdev->dev.hdc)) color = !color;
calc_rop_masks( rop, color, bg_mask );
}
static inline void order_end_points(int *s, int *e)
{
if(*s > *e)
{
int tmp;
tmp = *s + 1;
*s = *e + 1;
*e = tmp;
}
}
#define Y_INCREASING_MASK 0x0f
#define X_INCREASING_MASK 0xc3
#define X_MAJOR_MASK 0x99
#define POS_SLOPE_MASK 0x33
static inline BOOL is_xmajor(DWORD octant)
{
return octant & X_MAJOR_MASK;
}
static inline BOOL is_pos_slope(DWORD octant)
{
return octant & POS_SLOPE_MASK;
}
static inline BOOL is_x_increasing(DWORD octant)
{
return octant & X_INCREASING_MASK;
}
static inline BOOL is_y_increasing(DWORD octant)
{
return octant & Y_INCREASING_MASK;
}
/**********************************************************************
* get_octant_number
*
* Return the octant number starting clockwise from the +ve x-axis.
*/
static inline int get_octant_number(int dx, int dy)
{
if(dy > 0)
if(dx > 0)
return ( dx > dy) ? 1 : 2;
else
return (-dx > dy) ? 4 : 3;
else
if(dx < 0)
return (-dx > -dy) ? 5 : 6;
else
return ( dx > -dy) ? 8 : 7;
}
static inline DWORD get_octant_mask(int dx, int dy)
{
return 1 << (get_octant_number(dx, dy) - 1);
}
static inline int get_bias( DWORD mask )
{
/* Octants 3, 5, 6 and 8 take a bias */
return (mask & 0xb4) ? 1 : 0;
}
#define OUT_LEFT 1
#define OUT_RIGHT 2
#define OUT_TOP 4
#define OUT_BOTTOM 8
static inline DWORD calc_outcode(const POINT *pt, const RECT *clip)
{
DWORD out = 0;
if(pt->x < clip->left) out |= OUT_LEFT;
else if(pt->x >= clip->right) out |= OUT_RIGHT;
if(pt->y < clip->top) out |= OUT_TOP;
else if(pt->y >= clip->bottom) out |= OUT_BOTTOM;
return out;
}
/* crop coordinates to a reasonable range to avoid overflows in calculations */
static inline POINT crop_coords( POINT pt )
{
if (pt.x >= 0x10000000 || pt.x <= -0x10000000 || pt.y >= 0x10000000 || pt.y <= -0x10000000)
{
pt.x /= 8;
pt.y /= 8;
}
return pt;
}
static void init_bres_params( const POINT *start, const POINT *end, bres_params *clip_params,
struct line_params *line_params, RECT *rect )
{
INT dx = end->x - start->x, dy = end->y - start->y;
INT abs_dx = abs(dx), abs_dy = abs(dy);
clip_params->dx = abs_dx;
clip_params->dy = abs_dy;
clip_params->octant = get_octant_mask(dx, dy);
clip_params->bias = get_bias( clip_params->octant );
line_params->bias = clip_params->bias;
line_params->x_major = is_xmajor( clip_params->octant );
line_params->x_inc = is_x_increasing( clip_params->octant ) ? 1 : -1;
line_params->y_inc = is_y_increasing( clip_params->octant ) ? 1 : -1;
if (line_params->x_major)
{
line_params->err_add_1 = 2 * abs_dy - 2 * abs_dx;
line_params->err_add_2 = 2 * abs_dy;
}
else
{
line_params->err_add_1 = 2 * abs_dx - 2 * abs_dy;
line_params->err_add_2 = 2 * abs_dx;
}
rect->left = min( start->x, end->x );
rect->top = min( start->y, end->y );
rect->right = max( start->x, end->x ) + 1;
rect->bottom = max( start->y, end->y ) + 1;
}
/******************************************************************************
* clip_line
*
* Clips the start and end points to a rectangle.
*
* Note, this treats the end point like the start point. If the
* caller doesn't want it displayed, it should exclude it. If the end
* point is clipped out, then the likelihood is that the new end point
* should be displayed.
*
* Returns 0 if totally excluded, 1 if partially clipped and 2 if unclipped.
*
* This derivation is based on the comments in X.org's xserver/mi/mizerclip.c,
* however the Bresenham error term is defined differently so the equations
* will also differ.
*
* For x major lines we have 2dy >= err + bias > 2dy - 2dx
* 0 >= err + bias - 2dy > -2dx
*
* Note dx, dy, m and n are all +ve.
*
* Moving the start pt from x1 to x1 + m, we need to figure out y1 + n.
* err = 2dy - dx + 2mdy - 2ndx
* 0 >= 2dy - dx + 2mdy - 2ndx + bias - 2dy > -2dx
* 0 >= 2mdy - 2ndx + bias - dx > -2dx
* which of course will give exactly one solution for n,
* so looking at the >= inequality
* n >= (2mdy + bias - dx) / 2dx
* n = ceiling((2mdy + bias - dx) / 2dx)
* = (2mdy + bias + dx - 1) / 2dx (assuming division truncation)
*
* Moving start pt from y1 to y1 + n we need to figure out x1 + m - there may be several
* solutions we pick the one that minimizes m (ie that first unlipped pt). As above:
* 0 >= 2mdy - 2ndx + bias - dx > -2dx
* 2mdy > 2ndx - bias - dx
* m > (2ndx - bias - dx) / 2dy
* m = floor((2ndx - bias - dx) / 2dy) + 1
* m = (2ndx - bias - dx) / 2dy + 1
*
* Moving end pt from x2 to x2 - m, we need to figure out y2 - n
* err = 2dy - dx + 2(dx - m)dy - 2(dy - n)dx
* = 2dy - dx - 2mdy + 2ndx
* 0 >= 2dy - dx - 2mdy + 2ndx + bias - 2dy > -2dx
* 0 >= 2ndx - 2mdy + bias - dx > -2dx
* again exactly one solution.
* 2ndx <= 2mdy - bias + dx
* n = floor((2mdy - bias + dx) / 2dx)
* = (2mdy - bias + dx) / 2dx
*
* Moving end pt from y2 to y2 - n when need x2 - m this time maximizing x2 - m so
* mininizing m to include all of the points at y = y2 - n. As above:
* 0 >= 2ndx - 2mdy + bias - dx > -2dx
* 2mdy >= 2ndx + bias - dx
* m = ceiling((2ndx + bias - dx) / 2dy)
* = (2ndx + bias - dx - 1) / 2dy + 1
*
* For y major lines, symmetry (dx <-> dy and swap the cases over) gives:
*
* Moving start point from y1 to y1 + n find x1 + m
* m = (2ndx + bias + dy - 1) / 2dy
*
* Moving start point from x1 to x1 + m find y1 + n
* n = (2mdy - bias - dy) / 2ndx + 1
*
* Moving end point from y2 to y2 - n find x1 - m
* m = (2ndx - bias + dy) / 2dy
*
* Moving end point from x2 to x2 - m find y2 - n
* n = (2mdy + bias - dy - 1) / 2dx + 1
*/
int clip_line(const POINT *start, const POINT *end, const RECT *clip,
const bres_params *params, POINT *pt1, POINT *pt2)
{
INT64 m, n; /* 64-bit to avoid overflows (FIXME: find a more efficient way) */
BOOL clipped = FALSE;
DWORD start_oc, end_oc;
const int bias = params->bias;
const unsigned int dx = params->dx;
const unsigned int dy = params->dy;
const unsigned int two_dx = params->dx * 2;
const unsigned int two_dy = params->dy * 2;
const BOOL xmajor = is_xmajor(params->octant);
const BOOL neg_slope = !is_pos_slope(params->octant);
*pt1 = *start;
*pt2 = *end;
start_oc = calc_outcode(start, clip);
end_oc = calc_outcode(end, clip);
while(1)
{
if(start_oc == 0 && end_oc == 0) return clipped ? 1 : 2; /* trivial accept */
if(start_oc & end_oc) return 0; /* trivial reject */
clipped = TRUE;
if(start_oc & OUT_LEFT)
{
m = clip->left - start->x;
if(xmajor)
n = (m * two_dy + bias + dx - 1) / two_dx;
else
n = (m * two_dy - bias - dy) / two_dx + 1;
pt1->x = clip->left;
if(neg_slope) n = -n;
pt1->y = start->y + n;
start_oc = calc_outcode(pt1, clip);
}
else if(start_oc & OUT_RIGHT)
{
m = start->x - clip->right + 1;
if(xmajor)
n = (m * two_dy + bias + dx - 1) / two_dx;
else
n = (m * two_dy - bias - dy) / two_dx + 1;
pt1->x = clip->right - 1;
if(neg_slope) n = -n;
pt1->y = start->y - n;
start_oc = calc_outcode(pt1, clip);
}
else if(start_oc & OUT_TOP)
{
n = clip->top - start->y;
if(xmajor)
m = (n * two_dx - bias - dx) / two_dy + 1;
else
m = (n * two_dx + bias + dy - 1) / two_dy;
pt1->y = clip->top;
if(neg_slope) m = -m;
pt1->x = start->x + m;
start_oc = calc_outcode(pt1, clip);
}
else if(start_oc & OUT_BOTTOM)
{
n = start->y - clip->bottom + 1;
if(xmajor)
m = (n * two_dx - bias - dx) / two_dy + 1;
else
m = (n * two_dx + bias + dy - 1) / two_dy;
pt1->y = clip->bottom - 1;
if(neg_slope) m = -m;
pt1->x = start->x - m;
start_oc = calc_outcode(pt1, clip);
}
else if(end_oc & OUT_LEFT)
{
m = clip->left - end->x;
if(xmajor)
n = (m * two_dy - bias + dx) / two_dx;
else
n = (m * two_dy + bias - dy - 1) / two_dx + 1;
pt2->x = clip->left;
if(neg_slope) n = -n;
pt2->y = end->y + n;
end_oc = calc_outcode(pt2, clip);
}
else if(end_oc & OUT_RIGHT)
{
m = end->x - clip->right + 1;
if(xmajor)
n = (m * two_dy - bias + dx) / two_dx;
else
n = (m * two_dy + bias - dy - 1) / two_dx + 1;
pt2->x = clip->right - 1;
if(neg_slope) n = -n;
pt2->y = end->y - n;
end_oc = calc_outcode(pt2, clip);
}
else if(end_oc & OUT_TOP)
{
n = clip->top - end->y;
if(xmajor)
m = (n * two_dx + bias - dx - 1) / two_dy + 1;
else
m = (n * two_dx - bias + dy) / two_dy;
pt2->y = clip->top;
if(neg_slope) m = -m;
pt2->x = end->x + m;
end_oc = calc_outcode(pt2, clip);
}
else if(end_oc & OUT_BOTTOM)
{
n = end->y - clip->bottom + 1;
if(xmajor)
m = (n * two_dx + bias - dx - 1) / two_dy + 1;
else
m = (n * two_dx - bias + dy) / two_dy;
pt2->y = clip->bottom - 1;
if(neg_slope) m = -m;
pt2->x = end->x - m;
end_oc = calc_outcode(pt2, clip);
}
}
}
static void bres_line_with_bias(const POINT *start, const struct line_params *params,
void (* callback)(dibdrv_physdev*,INT,INT), dibdrv_physdev *pdev)
{
POINT pt = *start;
int len = params->length, err = params->err_start;
if (params->x_major)
{
while(len--)
{
callback(pdev, pt.x, pt.y);
if (err + params->bias > 0)
{
pt.y += params->y_inc;
err += params->err_add_1;
}
else err += params->err_add_2;
pt.x += params->x_inc;
}
}
else
{
while(len--)
{
callback(pdev, pt.x, pt.y);
if (err + params->bias > 0)
{
pt.x += params->x_inc;
err += params->err_add_1;
}
else err += params->err_add_2;
pt.y += params->y_inc;
}
}
}
static BOOL solid_pen_line(dibdrv_physdev *pdev, POINT *start, POINT *end, DWORD and, DWORD xor)
{
struct clipped_rects clipped_rects;
RECT rect;
int i;
if(start->y == end->y)
{
rect.left = start->x;
rect.top = start->y;
rect.right = end->x;
rect.bottom = end->y + 1;
order_end_points(&rect.left, &rect.right);
if (!get_clipped_rects( &pdev->dib, &rect, pdev->clip, &clipped_rects )) return TRUE;
pdev->dib.funcs->solid_rects(&pdev->dib, clipped_rects.count, clipped_rects.rects, and, xor);
}
else if(start->x == end->x)
{
rect.left = start->x;
rect.top = start->y;
rect.right = end->x + 1;
rect.bottom = end->y;
order_end_points(&rect.top, &rect.bottom);
if (!get_clipped_rects( &pdev->dib, &rect, pdev->clip, &clipped_rects )) return TRUE;
pdev->dib.funcs->solid_rects(&pdev->dib, clipped_rects.count, clipped_rects.rects, and, xor);
}
else
{
bres_params clip_params;
struct line_params line_params;
POINT p1 = crop_coords( *start ), p2 = crop_coords( *end );
init_bres_params( &p1, &p2, &clip_params, &line_params, &rect );
if (!get_clipped_rects( &pdev->dib, &rect, pdev->clip, &clipped_rects )) return TRUE;
for (i = 0; i < clipped_rects.count; i++)
{
POINT clipped_start, clipped_end;
int clip_status;
clip_status = clip_line( &p1, &p2, clipped_rects.rects + i, &clip_params, &clipped_start, &clipped_end);
if(clip_status)
{
int m = abs(clipped_start.x - p1.x);
int n = abs(clipped_start.y - p1.y);
if (line_params.x_major)
{
line_params.err_start = 2 * clip_params.dy - clip_params.dx
+ m * 2 * clip_params.dy - n * 2 * clip_params.dx;
line_params.length = abs( clipped_end.x - clipped_start.x ) + 1;
}
else
{
line_params.err_start = 2 * clip_params.dx - clip_params.dy
+ n * 2 * clip_params.dx - m * 2 * clip_params.dy;
line_params.length = abs( clipped_end.y - clipped_start.y ) + 1;
}
if (clipped_end.x == p2.x && clipped_end.y == p2.y) line_params.length--;
pdev->dib.funcs->solid_line( &pdev->dib, &clipped_start, &line_params, and, xor );
if(clip_status == 2) break; /* completely unclipped, so we can finish */
}
}
}
free_clipped_rects( &clipped_rects );
return TRUE;
}
static void solid_line_region( const dib_info *dib, const POINT *start, const struct line_params *params,
HRGN region )
{
int len, err = params->err_start;
RECT rect;
rect.left = start->x;
rect.top = start->y;
rect.right = start->x + 1;
rect.bottom = start->y + 1;
if (params->x_major)
{
if (params->x_inc > 0)
{
for (len = params->length; len; len--, rect.right++)
{
if (err + params->bias > 0)
{
add_rect_to_region( region, &rect );
rect.left = rect.right;
rect.top += params->y_inc;
rect.bottom += params->y_inc;
err += params->err_add_1;
}
else err += params->err_add_2;
}
}
else
{
for (len = params->length; len; len--, rect.left--)
{
if (err + params->bias > 0)
{
add_rect_to_region( region, &rect );
rect.right = rect.left;
rect.top += params->y_inc;
rect.bottom += params->y_inc;
err += params->err_add_1;
}
else err += params->err_add_2;
}
}
}
else
{
if (params->y_inc > 0)
{
for (len = params->length; len; len--, rect.bottom++)
{
if (err + params->bias > 0)
{
add_rect_to_region( region, &rect );
rect.top = rect.bottom;
rect.left += params->x_inc;
rect.right += params->x_inc;
err += params->err_add_1;
}
else err += params->err_add_2;
}
}
else
{
for (len = params->length; len; len--, rect.top--)
{
if (err + params->bias > 0)
{
add_rect_to_region( region, &rect );
rect.bottom = rect.top;
rect.left += params->x_inc;
rect.right += params->x_inc;
err += params->err_add_1;
}
else err += params->err_add_2;
}
}
}
/* add final rect */
add_rect_to_region( region, &rect );
}
static BOOL solid_pen_line_region( dibdrv_physdev *pdev, POINT *start, POINT *end, HRGN region )
{
RECT rect;
rect.left = start->x;
rect.top = start->y;
rect.right = start->x + 1;
rect.bottom = start->y + 1;
if (start->y == end->y)
{
rect.right = end->x;
order_end_points(&rect.left, &rect.right);
if (clip_rect_to_dib( &pdev->dib, &rect )) add_rect_to_region( region, &rect );
}
else if(start->x == end->x)
{
rect.bottom = end->y;
order_end_points(&rect.top, &rect.bottom);
if (clip_rect_to_dib( &pdev->dib, &rect )) add_rect_to_region( region, &rect );
}
else
{
bres_params clip_params;
struct line_params line_params;
POINT p1 = crop_coords( *start ), p2 = crop_coords( *end );
init_bres_params( &p1, &p2, &clip_params, &line_params, &rect );
if (clip_rect_to_dib( &pdev->dib, &rect ))
{
POINT clipped_start, clipped_end;
if (clip_line( &p1, &p2, &rect, &clip_params, &clipped_start, &clipped_end ))
{
int m = abs(clipped_start.x - p1.x);
int n = abs(clipped_start.y - p1.y);
if (line_params.x_major)
{
line_params.err_start = 2 * clip_params.dy - clip_params.dx
+ m * 2 * clip_params.dy - n * 2 * clip_params.dx;
line_params.length = abs( clipped_end.x - clipped_start.x ) + 1;
}
else
{
line_params.err_start = 2 * clip_params.dx - clip_params.dy
+ n * 2 * clip_params.dx - m * 2 * clip_params.dy;
line_params.length = abs( clipped_end.y - clipped_start.y ) + 1;
}
if (clipped_end.x == p2.x && clipped_end.y == p2.y) line_params.length--;
solid_line_region( &pdev->dib, &clipped_start, &line_params, region );
}
}
}
return TRUE;
}
static BOOL solid_pen_lines(dibdrv_physdev *pdev, int num, POINT *pts, BOOL close, HRGN region)
{
int i;
assert( num >= 2 );
if (region)
{
for (i = 0; i < num - 1; i++)
if (!solid_pen_line_region( pdev, pts + i, pts + i + 1, region ))
return FALSE;
if (close) return solid_pen_line_region( pdev, pts + num - 1, pts, region );
}
else
{
DWORD color, and, xor;
color = get_pixel_color( pdev, pdev->pen_brush.colorref, TRUE );
calc_and_xor_masks( GetROP2(pdev->dev.hdc), color, &and, &xor );
for (i = 0; i < num - 1; i++)
if (!solid_pen_line( pdev, pts + i, pts + i + 1, and, xor ))
return FALSE;
if (close) return solid_pen_line( pdev, pts + num - 1, pts, and, xor );
}
return TRUE;
}
void reset_dash_origin(dibdrv_physdev *pdev)
{
pdev->dash_pos.cur_dash = 0;
pdev->dash_pos.left_in_dash = pdev->pen_pattern.dashes[0];
pdev->dash_pos.mark = TRUE;
}
static inline void skip_dash(dibdrv_physdev *pdev, unsigned int skip)
{
skip %= pdev->pen_pattern.total_len;
do
{
if(pdev->dash_pos.left_in_dash > skip)
{
pdev->dash_pos.left_in_dash -= skip;
return;
}
skip -= pdev->dash_pos.left_in_dash;
pdev->dash_pos.cur_dash++;
if(pdev->dash_pos.cur_dash == pdev->pen_pattern.count) pdev->dash_pos.cur_dash = 0;
pdev->dash_pos.left_in_dash = pdev->pen_pattern.dashes[pdev->dash_pos.cur_dash];
pdev->dash_pos.mark = !pdev->dash_pos.mark;
}
while (skip);
}
static void dashed_pen_line_callback(dibdrv_physdev *pdev, INT x, INT y)
{
RECT rect;
rop_mask mask = pdev->dash_masks[pdev->dash_pos.mark];
skip_dash(pdev, 1);
rect.left = x;
rect.right = x + 1;
rect.top = y;
rect.bottom = y + 1;
pdev->dib.funcs->solid_rects(&pdev->dib, 1, &rect, mask.and, mask.xor);
return;
}
static BOOL dashed_pen_line(dibdrv_physdev *pdev, POINT *start, POINT *end)
{
struct clipped_rects clipped_rects;
int i, dash_len;
RECT rect;
const dash_pos start_pos = pdev->dash_pos;
if(start->y == end->y) /* hline */
{
BOOL l_to_r;
INT left, right, cur_x;
rect.top = start->y;
rect.bottom = start->y + 1;
if(start->x <= end->x)
{
left = start->x;
right = end->x - 1;
l_to_r = TRUE;
}
else
{
left = end->x + 1;
right = start->x;
l_to_r = FALSE;
}
rect.left = min( start->x, end->x );
rect.right = max( start->x, end->x ) + 1;
get_clipped_rects( &pdev->dib, &rect, pdev->clip, &clipped_rects );
for (i = 0; i < clipped_rects.count; i++)
{
if(clipped_rects.rects[i].right > left && clipped_rects.rects[i].left <= right)
{
int clipped_left = max(clipped_rects.rects[i].left, left);
int clipped_right = min(clipped_rects.rects[i].right - 1, right);
pdev->dash_pos = start_pos;
if(l_to_r)
{
cur_x = clipped_left;
if(cur_x != left)
skip_dash(pdev, clipped_left - left);
while(cur_x <= clipped_right)
{
rop_mask mask = pdev->dash_masks[pdev->dash_pos.mark];
dash_len = pdev->dash_pos.left_in_dash;
if(cur_x + dash_len > clipped_right + 1)
dash_len = clipped_right - cur_x + 1;
rect.left = cur_x;
rect.right = cur_x + dash_len;
pdev->dib.funcs->solid_rects(&pdev->dib, 1, &rect, mask.and, mask.xor);
cur_x += dash_len;
skip_dash(pdev, dash_len);
}
}
else
{
cur_x = clipped_right;
if(cur_x != right)
skip_dash(pdev, right - clipped_right);
while(cur_x >= clipped_left)
{
rop_mask mask = pdev->dash_masks[pdev->dash_pos.mark];
dash_len = pdev->dash_pos.left_in_dash;
if(cur_x - dash_len < clipped_left - 1)
dash_len = cur_x - clipped_left + 1;
rect.left = cur_x - dash_len + 1;
rect.right = cur_x + 1;
pdev->dib.funcs->solid_rects(&pdev->dib, 1, &rect, mask.and, mask.xor);
cur_x -= dash_len;
skip_dash(pdev, dash_len);
}
}
}
}
pdev->dash_pos = start_pos;
skip_dash(pdev, right - left + 1);
}
else if(start->x == end->x) /* vline */
{
BOOL t_to_b;
INT top, bottom, cur_y;
rect.left = start->x;
rect.right = start->x + 1;
if(start->y <= end->y)
{
top = start->y;
bottom = end->y - 1;
t_to_b = TRUE;
}
else
{
top = end->y + 1;
bottom = start->y;
t_to_b = FALSE;
}
rect.top = min( start->y, end->y );
rect.bottom = max( start->y, end->y ) + 1;
get_clipped_rects( &pdev->dib, &rect, pdev->clip, &clipped_rects );
for (i = 0; i < clipped_rects.count; i++)
{
if(clipped_rects.rects[i].right > start->x && clipped_rects.rects[i].left <= start->x)
{
int clipped_top = max(clipped_rects.rects[i].top, top);
int clipped_bottom = min(clipped_rects.rects[i].bottom - 1, bottom);
pdev->dash_pos = start_pos;
if(t_to_b)
{
cur_y = clipped_top;
if(cur_y != top)
skip_dash(pdev, clipped_top - top);
while(cur_y <= clipped_bottom)
{
rop_mask mask = pdev->dash_masks[pdev->dash_pos.mark];
dash_len = pdev->dash_pos.left_in_dash;
if(cur_y + dash_len > clipped_bottom + 1)
dash_len = clipped_bottom - cur_y + 1;
rect.top = cur_y;
rect.bottom = cur_y + dash_len;
pdev->dib.funcs->solid_rects(&pdev->dib, 1, &rect, mask.and, mask.xor);
cur_y += dash_len;
skip_dash(pdev, dash_len);
}
}
else
{
cur_y = clipped_bottom;
if(cur_y != bottom)
skip_dash(pdev, bottom - clipped_bottom);
while(cur_y >= clipped_top)
{
rop_mask mask = pdev->dash_masks[pdev->dash_pos.mark];
dash_len = pdev->dash_pos.left_in_dash;
if(cur_y - dash_len < clipped_top - 1)
dash_len = cur_y - clipped_top + 1;
rect.top = cur_y - dash_len + 1;
rect.bottom = cur_y + 1;
pdev->dib.funcs->solid_rects(&pdev->dib, 1, &rect, mask.and, mask.xor);
cur_y -= dash_len;
skip_dash(pdev, dash_len);
}
}
}
}
pdev->dash_pos = start_pos;
skip_dash(pdev, bottom - top + 1);
}
else
{
bres_params clip_params;
struct line_params line_params;
POINT p1 = crop_coords( *start ), p2 = crop_coords( *end );
init_bres_params( &p1, &p2, &clip_params, &line_params, &rect );
get_clipped_rects( &pdev->dib, &rect, pdev->clip, &clipped_rects );
for (i = 0; i < clipped_rects.count; i++)
{
POINT clipped_start, clipped_end;
int clip_status;
clip_status = clip_line(&p1, &p2, clipped_rects.rects + i, &clip_params, &clipped_start, &clipped_end);
if(clip_status)
{
int m = abs(clipped_start.x - p1.x);
int n = abs(clipped_start.y - p1.y);
pdev->dash_pos = start_pos;
if (line_params.x_major)
{
line_params.err_start = 2 * clip_params.dy - clip_params.dx
+ m * 2 * clip_params.dy - n * 2 * clip_params.dx;
line_params.length = abs( clipped_end.x - clipped_start.x ) + 1;
skip_dash(pdev, m);
}
else
{
line_params.err_start = 2 * clip_params.dx - clip_params.dy
+ n * 2 * clip_params.dx - m * 2 * clip_params.dy;
line_params.length = abs( clipped_end.y - clipped_start.y ) + 1;
skip_dash(pdev, n);
}
if (clipped_end.x == end->x && clipped_end.y == end->y) line_params.length--;
bres_line_with_bias( &clipped_start, &line_params, dashed_pen_line_callback, pdev );
if(clip_status == 2) break; /* completely unclipped, so we can finish */
}
}
pdev->dash_pos = start_pos;
if(line_params.x_major)
skip_dash(pdev, clip_params.dx);
else
skip_dash(pdev, clip_params.dy);
}
free_clipped_rects( &clipped_rects );
return TRUE;
}
static BOOL dashed_pen_line_region(dibdrv_physdev *pdev, POINT *start, POINT *end, HRGN region)
{
int i, dash_len;
RECT rect;
rect.left = start->x;
rect.top = start->y;
rect.right = start->x + 1;
rect.bottom = start->y + 1;
if (start->y == end->y) /* hline */
{
if (start->x <= end->x)
{
for (i = start->x; i < end->x; i += dash_len)
{
dash_len = min( pdev->dash_pos.left_in_dash, end->x - i );
if (pdev->dash_pos.mark)
{
rect.left = i;
rect.right = i + dash_len;
add_rect_to_region( region, &rect );
}
skip_dash(pdev, dash_len);
}
}
else
{
for (i = start->x; i > end->x; i -= dash_len)
{
dash_len = min( pdev->dash_pos.left_in_dash, i - end->x );
if (pdev->dash_pos.mark)
{
rect.left = i - dash_len + 1;
rect.right = i + 1;
add_rect_to_region( region, &rect );
}
skip_dash(pdev, dash_len);
}
}
}
else if (start->x == end->x) /* vline */
{
if (start->y <= end->y)
{
for (i = start->y; i < end->y; i += dash_len)
{
dash_len = min( pdev->dash_pos.left_in_dash, end->y - i );
if (pdev->dash_pos.mark)
{
rect.top = i;
rect.bottom = i + dash_len;
add_rect_to_region( region, &rect );
}
skip_dash(pdev, dash_len);
}
}
else
{
for (i = start->y; i > end->y; i -= dash_len)
{
dash_len = min( pdev->dash_pos.left_in_dash, i - end->y );
if (pdev->dash_pos.mark)
{
rect.top = i - dash_len + 1;
rect.bottom = i + 1;
add_rect_to_region( region, &rect );
}
skip_dash(pdev, dash_len);
}
}
}
else
{
INT dx = end->x - start->x, dy = end->y - start->y;
INT abs_dx = abs(dx), abs_dy = abs(dy);
DWORD octant = get_octant_mask(dx, dy);
INT bias = get_bias( octant );
int x_inc = is_x_increasing( octant ) ? 1 : -1;
int y_inc = is_y_increasing( octant ) ? 1 : -1;
if (is_xmajor( octant ))
{
int err_add_1 = 2 * abs_dy - 2 * abs_dx;
int err_add_2 = 2 * abs_dy;
int err = 2 * abs_dy - abs_dx;
while (abs_dx--)
{
if (pdev->dash_pos.mark) add_rect_to_region( region, &rect );
skip_dash(pdev, 1);
rect.left += x_inc;
rect.right += x_inc;
if (err + bias > 0)
{
rect.top += y_inc;
rect.bottom += y_inc;
err += err_add_1;
}
else err += err_add_2;
}
}
else
{
int err_add_1 = 2 * abs_dx - 2 * abs_dy;
int err_add_2 = 2 * abs_dx;
int err = 2 * abs_dx - abs_dy;
while (abs_dy--)
{
if (pdev->dash_pos.mark) add_rect_to_region( region, &rect );
skip_dash(pdev, 1);
rect.top += y_inc;
rect.bottom += y_inc;
if (err + bias > 0)
{
rect.left += x_inc;
rect.right += x_inc;
err += err_add_1;
}
else err += err_add_2;
}
}
}
return TRUE;
}
static BOOL dashed_pen_lines(dibdrv_physdev *pdev, int num, POINT *pts, BOOL close, HRGN region)
{
int i;
assert( num >= 2 );
if (region)
{
for (i = 0; i < num - 1; i++)
if (!dashed_pen_line_region( pdev, pts + i, pts + i + 1, region ))
return FALSE;
if (close) return dashed_pen_line_region( pdev, pts + num - 1, pts, region );
}
else
{
get_color_masks( pdev, GetROP2(pdev->dev.hdc), pdev->pen_brush.colorref,
pdev->pen_is_ext ? TRANSPARENT : GetBkMode(pdev->dev.hdc),
&pdev->dash_masks[1], &pdev->dash_masks[0] );
for (i = 0; i < num - 1; i++)
if (!dashed_pen_line( pdev, pts + i, pts + i + 1 ))
return FALSE;
if (close) return dashed_pen_line( pdev, pts + num - 1, pts );
}
return TRUE;
}
static BOOL null_pen_lines(dibdrv_physdev *pdev, int num, POINT *pts, BOOL close, HRGN region)
{
return TRUE;
}
struct face
{
POINT start, end;
int dx, dy;
};
static void add_cap( dibdrv_physdev *pdev, HRGN region, HRGN round_cap, const POINT *pt )
{
switch (pdev->pen_endcap)
{
default: FIXME( "Unknown end cap %x\n", pdev->pen_endcap );
/* fall through */
case PS_ENDCAP_ROUND:
OffsetRgn( round_cap, pt->x, pt->y );
CombineRgn( region, region, round_cap, RGN_OR );
OffsetRgn( round_cap, -pt->x, -pt->y );
return;
case PS_ENDCAP_SQUARE: /* already been handled */
case PS_ENDCAP_FLAT:
return;
}
}
#define round( f ) (((f) > 0) ? (f) + 0.5 : (f) - 0.5)
/*******************************************************************************
* create_miter_region
*
* We need to calculate the intersection of two lines. We know a point
* on each line (a face start and the other face end point) and
* the direction vector of each line eg. (dx_1, dy_1).
*
* (x, y) = (x_1, y_1) + u * (dx_1, dy_1) = (x_2, y_2) + v * (dx_2, dy_2)
* solving (eg using Cramer's rule) gives:
* u = ((x_2 - x_1) dy_2 - (y_2 - y_1) dx_2) / det
* with det = dx_1 dy_2 - dx_2 dy_1
* substituting back in and simplifying gives
* (x, y) = a (dx_1, dy_1) - b (dx_2, dy_2)
* with a = (x_2 dy_2 - y_2 dx_2) / det
* and b = (x_1 dy_1 - y_1 dx_1) / det
*/
static HRGN create_miter_region( dibdrv_physdev *pdev, const POINT *pt,
const struct face *face_1, const struct face *face_2 )
{
int det = face_1->dx * face_2->dy - face_1->dy * face_2->dx;
POINT pt_1, pt_2, pts[5];
double a, b, x, y;
FLOAT limit;
if (det == 0) return 0;
if (det < 0)
{
const struct face *tmp = face_1;
face_1 = face_2;
face_2 = tmp;
det = -det;
}
pt_1 = face_1->start;
pt_2 = face_2->end;
a = (double)((pt_2.x * face_2->dy - pt_2.y * face_2->dx)) / det;
b = (double)((pt_1.x * face_1->dy - pt_1.y * face_1->dx)) / det;
x = a * face_1->dx - b * face_2->dx;
y = a * face_1->dy - b * face_2->dy;
GetMiterLimit( pdev->dev.hdc, &limit );
if (((x - pt->x) * (x - pt->x) + (y - pt->y) * (y - pt->y)) * 4 > limit * limit * pdev->pen_width * pdev->pen_width)
return 0;
pts[0] = face_2->start;
pts[1] = face_1->start;
pts[2].x = round( x );
pts[2].y = round( y );
pts[3] = face_2->end;
pts[4] = face_1->end;
return CreatePolygonRgn( pts, 5, ALTERNATE );
}
static void add_join( dibdrv_physdev *pdev, HRGN region, HRGN round_cap, const POINT *pt,
const struct face *face_1, const struct face *face_2 )
{
HRGN join;
POINT pts[4];
switch (pdev->pen_join)
{
default: FIXME( "Unknown line join %x\n", pdev->pen_join );
/* fall through */
case PS_JOIN_ROUND:
OffsetRgn( round_cap, pt->x, pt->y );
CombineRgn( region, region, round_cap, RGN_OR );
OffsetRgn( round_cap, -pt->x, -pt->y );
return;
case PS_JOIN_MITER:
join = create_miter_region( pdev, pt, face_1, face_2 );
if (join) break;
/* fall through */
case PS_JOIN_BEVEL:
pts[0] = face_1->start;
pts[1] = face_2->end;
pts[2] = face_1->end;
pts[3] = face_2->start;
join = CreatePolygonRgn( pts, 4, ALTERNATE );
break;
}
CombineRgn( region, region, join, RGN_OR );
DeleteObject( join );
return;
}
static int wide_line_segment( dibdrv_physdev *pdev, HRGN total,
const POINT *pt_1, const POINT *pt_2, int dx, int dy,
BOOL need_cap_1, BOOL need_cap_2, struct face *face_1, struct face *face_2 )
{
RECT rect;
BOOL sq_cap_1 = need_cap_1 && (pdev->pen_endcap == PS_ENDCAP_SQUARE);
BOOL sq_cap_2 = need_cap_2 && (pdev->pen_endcap == PS_ENDCAP_SQUARE);
if (dx == 0 && dy == 0) return 0;
if (dy == 0)
{
rect.left = min( pt_1->x, pt_2->x );
rect.right = max( pt_1->x, pt_2->x );
rect.top = pt_1->y - pdev->pen_width / 2;
rect.bottom = rect.top + pdev->pen_width;
if ((sq_cap_1 && dx > 0) || (sq_cap_2 && dx < 0)) rect.left -= pdev->pen_width / 2;
if ((sq_cap_2 && dx > 0) || (sq_cap_1 && dx < 0)) rect.right += pdev->pen_width / 2;
add_rect_to_region( total, &rect );
if (dx > 0)
{
face_1->start.x = face_1->end.x = rect.left;
face_1->start.y = face_2->end.y = rect.bottom;
face_1->end.y = face_2->start.y = rect.top;
face_2->start.x = face_2->end.x = rect.right - 1;
}
else
{
face_1->start.x = face_1->end.x = rect.right;
face_1->start.y = face_2->end.y = rect.top;
face_1->end.y = face_2->start.y = rect.bottom;
face_2->start.x = face_2->end.x = rect.left + 1;
}
}
else if (dx == 0)
{
rect.top = min( pt_1->y, pt_2->y );
rect.bottom = max( pt_1->y, pt_2->y );
rect.left = pt_1->x - pdev->pen_width / 2;
rect.right = rect.left + pdev->pen_width;
if ((sq_cap_1 && dy > 0) || (sq_cap_2 && dy < 0)) rect.top -= pdev->pen_width / 2;
if ((sq_cap_2 && dy > 0) || (sq_cap_1 && dy < 0)) rect.bottom += pdev->pen_width / 2;
add_rect_to_region( total, &rect );
if (dy > 0)
{
face_1->start.x = face_2->end.x = rect.left;
face_1->start.y = face_1->end.y = rect.top;
face_1->end.x = face_2->start.x = rect.right;
face_2->start.y = face_2->end.y = rect.bottom - 1;
}
else
{
face_1->start.x = face_2->end.x = rect.right;
face_1->start.y = face_1->end.y = rect.bottom;
face_1->end.x = face_2->start.x = rect.left;
face_2->start.y = face_2->end.y = rect.top + 1;
}
}
else
{
double len = hypot( dx, dy );
double width_x, width_y;
POINT seg_pts[4];
POINT wide_half, narrow_half;
HRGN segment;
width_x = pdev->pen_width * abs( dy ) / len;
width_y = pdev->pen_width * abs( dx ) / len;
narrow_half.x = round( width_x / 2 );
narrow_half.y = round( width_y / 2 );
wide_half.x = round( (width_x + 1) / 2 );
wide_half.y = round( (width_y + 1) / 2 );
if (dx < 0)
{
wide_half.y = -wide_half.y;
narrow_half.y = -narrow_half.y;
}
if (dy < 0)
{
POINT tmp = narrow_half; narrow_half = wide_half; wide_half = tmp;
wide_half.x = -wide_half.x;
narrow_half.x = -narrow_half.x;
}
seg_pts[0].x = pt_1->x - narrow_half.x;
seg_pts[0].y = pt_1->y + narrow_half.y;
seg_pts[1].x = pt_1->x + wide_half.x;
seg_pts[1].y = pt_1->y - wide_half.y;
seg_pts[2].x = pt_2->x + wide_half.x;
seg_pts[2].y = pt_2->y - wide_half.y;
seg_pts[3].x = pt_2->x - narrow_half.x;
seg_pts[3].y = pt_2->y + narrow_half.y;
if (sq_cap_1)
{
seg_pts[0].x -= narrow_half.y;
seg_pts[1].x -= narrow_half.y;
seg_pts[0].y -= narrow_half.x;
seg_pts[1].y -= narrow_half.x;
}
if (sq_cap_2)
{
seg_pts[2].x += wide_half.y;
seg_pts[3].x += wide_half.y;
seg_pts[2].y += wide_half.x;
seg_pts[3].y += wide_half.x;
}
segment = CreatePolygonRgn( seg_pts, 4, ALTERNATE );
CombineRgn( total, total, segment, RGN_OR );
DeleteObject( segment );
face_1->start = seg_pts[0];
face_1->end = seg_pts[1];
face_2->start = seg_pts[2];
face_2->end = seg_pts[3];
}
face_1->dx = face_2->dx = dx;
face_1->dy = face_2->dy = dy;
return 1;
}
static void wide_line_segments( dibdrv_physdev *pdev, int num, const POINT *pts, BOOL close,
int start, int count, const POINT *first_pt, const POINT *last_pt,
HRGN round_cap, HRGN total )
{
int i;
struct face face_1, face_2, prev_face, first_face;
const POINT *pt_1, *pt_2;
if (!close)
{
add_cap( pdev, total, round_cap, first_pt );
add_cap( pdev, total, round_cap, last_pt );
}
if (count == 1)
{
pt_1 = &pts[start];
pt_2 = &pts[(start + 1) % num];
wide_line_segment( pdev, total, first_pt, last_pt, pt_2->x - pt_1->x, pt_2->y - pt_1->y,
TRUE, TRUE, &face_1, &face_2 );
return;
}
pt_1 = &pts[start];
pt_2 = &pts[(start + 1) % num];
wide_line_segment( pdev, total, first_pt, pt_2, pt_2->x - pt_1->x, pt_2->y - pt_1->y,
!close, FALSE, &first_face, &prev_face );
for (i = 1; i < count - 1; i++)
{
pt_1 = &pts[(start + i) % num];
pt_2 = &pts[(start + i + 1) % num];
if (wide_line_segment( pdev, total, pt_1, pt_2, pt_2->x - pt_1->x, pt_2->y - pt_1->y,
FALSE, FALSE, &face_1, &face_2 ))
{
add_join( pdev, total, round_cap, pt_1, &prev_face, &face_1 );
prev_face = face_2;
}
}
pt_1 = &pts[(start + count - 1) % num];
pt_2 = &pts[(start + count) % num];
wide_line_segment( pdev, total, pt_1, last_pt, pt_2->x - pt_1->x, pt_2->y - pt_1->y,
FALSE, !close, &face_1, &face_2 );
add_join( pdev, total, round_cap, pt_1, &prev_face, &face_1 );
if (close) add_join( pdev, total, round_cap, last_pt, &face_2, &first_face );
}
static BOOL wide_pen_lines(dibdrv_physdev *pdev, int num, POINT *pts, BOOL close, HRGN total)
{
HRGN round_cap = 0;
assert( total != 0 ); /* wide pens should always be drawn through a region */
assert( num >= 2 );
/* skip empty segments */
while (num > 2 && pts[0].x == pts[1].x && pts[0].y == pts[1].y) { pts++; num--; }
while (num > 2 && pts[num - 1].x == pts[num - 2].x && pts[num - 1].y == pts[num - 2].y) num--;
if (pdev->pen_join == PS_JOIN_ROUND || pdev->pen_endcap == PS_ENDCAP_ROUND)
round_cap = CreateEllipticRgn( -(pdev->pen_width / 2), -(pdev->pen_width / 2),
(pdev->pen_width + 1) / 2 + 1, (pdev->pen_width + 1) / 2 + 1 );
if (close)
wide_line_segments( pdev, num, pts, TRUE, 0, num, &pts[0], &pts[0], round_cap, total );
else
wide_line_segments( pdev, num, pts, FALSE, 0, num - 1, &pts[0], &pts[num - 1], round_cap, total );
if (round_cap) DeleteObject( round_cap );
return TRUE;
}
static BOOL dashed_wide_pen_lines(dibdrv_physdev *pdev, int num, POINT *pts, BOOL close, HRGN total)
{
int i, start, cur_len, initial_num = 0;
POINT initial_point, start_point, end_point;
HRGN round_cap = 0;
assert( total != 0 ); /* wide pens should always be drawn through a region */
assert( num >= 2 );
/* skip empty segments */
while (num > 2 && pts[0].x == pts[1].x && pts[0].y == pts[1].y) { pts++; num--; }
while (num > 2 && pts[num - 1].x == pts[num - 2].x && pts[num - 1].y == pts[num - 2].y) num--;
if (pdev->pen_join == PS_JOIN_ROUND || pdev->pen_endcap == PS_ENDCAP_ROUND)
round_cap = CreateEllipticRgn( -(pdev->pen_width / 2), -(pdev->pen_width / 2),
(pdev->pen_width + 1) / 2 + 1, (pdev->pen_width + 1) / 2 + 1);
start = 0;
cur_len = 0;
start_point = pts[0];
for (i = 0; i < (close ? num : num - 1); i++)
{
const POINT *pt_1 = pts + i;
const POINT *pt_2 = pts + ((close && i == num - 1) ? 0 : i + 1);
int dx = pt_2->x - pt_1->x;
int dy = pt_2->y - pt_1->y;
if (dx == 0 && dy == 0) continue;
if (dy == 0)
{
if (abs( dx ) - cur_len < pdev->dash_pos.left_in_dash)
{
skip_dash( pdev, abs( dx ) - cur_len );
cur_len = 0;
continue;
}
cur_len += pdev->dash_pos.left_in_dash;
dx = (dx > 0) ? cur_len : -cur_len;
}
else if (dx == 0)
{
if (abs( dy ) - cur_len < pdev->dash_pos.left_in_dash)
{
skip_dash( pdev, abs( dy ) - cur_len );
cur_len = 0;
continue;
}
cur_len += pdev->dash_pos.left_in_dash;
dy = (dy > 0) ? cur_len : -cur_len;
}
else
{
double len = hypot( dx, dy );
if (len - cur_len < pdev->dash_pos.left_in_dash)
{
skip_dash( pdev, len - cur_len );
cur_len = 0;
continue;
}
cur_len += pdev->dash_pos.left_in_dash;
dx = dx * cur_len / len;
dy = dy * cur_len / len;
}
end_point.x = pt_1->x + dx;
end_point.y = pt_1->y + dy;
if (pdev->dash_pos.mark)
{
if (!initial_num && close) /* this is the first dash, save it for later */
{
initial_num = i - start + 1;
initial_point = end_point;
}
else wide_line_segments( pdev, num, pts, FALSE, start, i - start + 1,
&start_point, &end_point, round_cap, total );
}
if (!initial_num) initial_num = -1; /* no need to close it */
skip_dash( pdev, pdev->dash_pos.left_in_dash );
start_point = end_point;
start = i;
i--; /* go on with the same segment */
}
if (pdev->dash_pos.mark) /* we have a final dash */
{
int count;
if (initial_num > 0)
{
count = num - start + initial_num;
end_point = initial_point;
}
else if (close)
{
count = num - start;
end_point = pts[0];
}
else
{
count = num - start - 1;
end_point = pts[num - 1];
}
wide_line_segments( pdev, num, pts, FALSE, start, count,
&start_point, &end_point, round_cap, total );
}
else if (initial_num > 0) /* initial dash only */
{
wide_line_segments( pdev, num, pts, FALSE, 0, initial_num,
&pts[0], &initial_point, round_cap, total );
}
if (round_cap) DeleteObject( round_cap );
return TRUE;
}
static const dash_pattern dash_patterns_cosmetic[4] =
{
{2, {18, 6}, 24}, /* PS_DASH */
{2, {3, 3}, 6}, /* PS_DOT */
{4, {9, 6, 3, 6}, 24}, /* PS_DASHDOT */
{6, {9, 3, 3, 3, 3, 3}, 24} /* PS_DASHDOTDOT */
};
static const dash_pattern dash_patterns_geometric[4] =
{
{2, {3, 1}, 4}, /* PS_DASH */
{2, {1, 1}, 2}, /* PS_DOT */
{4, {3, 1, 1, 1}, 6}, /* PS_DASHDOT */
{6, {3, 1, 1, 1, 1, 1}, 8} /* PS_DASHDOTDOT */
};
static inline void set_dash_pattern( dash_pattern *pattern, DWORD count, DWORD *dashes )
{
DWORD i;
pattern->count = count;
pattern->total_len = 0;
memcpy( pattern->dashes, dashes, count * sizeof(DWORD) );
for (i = 0; i < count; i++) pattern->total_len += dashes[i];
if (pattern->count % 2) pattern->total_len *= 2;
}
static inline void scale_dash_pattern( dash_pattern *pattern, DWORD scale, DWORD endcap )
{
DWORD i;
for (i = 0; i < pattern->count; i++) pattern->dashes[i] *= scale;
pattern->total_len *= scale;
if (endcap != PS_ENDCAP_FLAT) /* shrink the dashes to leave room for the caps */
{
for (i = 0; i < pattern->count; i += 2)
{
pattern->dashes[i] -= scale;
pattern->dashes[i + 1] += scale;
}
}
}
static inline int get_pen_device_width( dibdrv_physdev *pdev, int width )
{
POINT pts[2];
if (!width) return 1;
pts[0].x = pts[0].y = pts[1].y = 0;
pts[1].x = width;
LPtoDP( pdev->dev.hdc, pts, 2 );
width = abs( pts[1].x - pts[0].x );
return max( width, 1 );
}
/***********************************************************************
* dibdrv_SetDCPenColor
*/
COLORREF dibdrv_SetDCPenColor( PHYSDEV dev, COLORREF color )
{
dibdrv_physdev *pdev = get_dibdrv_pdev(dev);
if (GetCurrentObject(dev->hdc, OBJ_PEN) == GetStockObject( DC_PEN ))
pdev->pen_brush.colorref = color;
return color;
}
/**********************************************************************
* solid_brush
*
* Fill a number of rectangles with the solid brush
*/
static BOOL solid_brush(dibdrv_physdev *pdev, dib_brush *brush, dib_info *dib,
int num, const RECT *rects, INT rop)
{
rop_mask brush_color;
DWORD color = get_pixel_color( pdev, brush->colorref, TRUE );
calc_rop_masks( rop, color, &brush_color );
dib->funcs->solid_rects( dib, num, rects, brush_color.and, brush_color.xor );
return TRUE;
}
static BOOL alloc_brush_mask_bits( dib_brush *brush )
{
DWORD size = brush->dib.height * abs(brush->dib.stride);
assert(brush->masks.and == NULL);
assert(brush->masks.xor == NULL);
assert(brush->dib.stride > 0);
if (!(brush->masks.and = HeapAlloc(GetProcessHeap(), 0, 2 * size))) return FALSE;
brush->masks.xor = (char *)brush->masks.and + size;
return TRUE;
}
static void free_brush_mask_bits( dib_brush *brush )
{
HeapFree(GetProcessHeap(), 0, brush->masks.and);
brush->masks.and = brush->masks.xor = NULL;
}
void free_pattern_brush( dib_brush *brush )
{
free_brush_mask_bits( brush );
free_dib_info( &brush->dib );
}
static BOOL create_pattern_brush_bits( dib_brush *brush )
{
DWORD size = brush->dib.height * abs(brush->dib.stride);
DWORD *brush_bits = brush->dib.bits.ptr;
DWORD *and_bits, *xor_bits;
if (!alloc_brush_mask_bits( brush )) return FALSE;
and_bits = brush->masks.and;
xor_bits = brush->masks.xor;
while(size)
{
calc_and_xor_masks(brush->rop, *brush_bits++, and_bits++, xor_bits++);
size -= 4;
}
return TRUE;
}
static const BYTE hatches[6][8] =
{
{ 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00 }, /* HS_HORIZONTAL */
{ 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08 }, /* HS_VERTICAL */
{ 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }, /* HS_FDIAGONAL */
{ 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }, /* HS_BDIAGONAL */
{ 0x08, 0x08, 0x08, 0xff, 0x08, 0x08, 0x08, 0x08 }, /* HS_CROSS */
{ 0x81, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x81 } /* HS_DIAGCROSS */
};
static BOOL init_hatch_brush( dibdrv_physdev *pdev, dib_brush *brush )
{
/* Just initialise brush dib with the color / sizing info. We don't
need the bits as we'll calculate the rop masks straight from
the hatch patterns. */
copy_dib_color_info(&brush->dib, &pdev->dib);
brush->dib.width = 8;
brush->dib.height = 8;
brush->dib.stride = get_dib_stride( brush->dib.width, brush->dib.bit_count );
brush->dib.rect.left = 0;
brush->dib.rect.top = 0;
brush->dib.rect.right = 8;
brush->dib.rect.bottom = 8;
return alloc_brush_mask_bits( brush );
}
static BOOL create_hatch_brush_bits(dibdrv_physdev *pdev, dib_brush *brush, BOOL *needs_reselect)
{
rop_mask fg_mask, bg_mask;
if (!init_hatch_brush( pdev, brush )) return FALSE;
get_color_masks( pdev, brush->rop, brush->colorref, GetBkMode(pdev->dev.hdc),
&fg_mask, &bg_mask );
if (brush->colorref & (1 << 24)) /* PALETTEINDEX */
*needs_reselect = TRUE;
if (GetBkMode(pdev->dev.hdc) != TRANSPARENT && (GetBkColor(pdev->dev.hdc) & (1 << 24)))
*needs_reselect = TRUE;
brush->dib.funcs->create_rop_masks( &brush->dib, hatches[brush->hatch],
&fg_mask, &bg_mask, &brush->masks );
return TRUE;
}
static BOOL create_dither_brush_bits(dibdrv_physdev *pdev, dib_brush *brush, BOOL *needs_reselect)
{
COLORREF rgb;
DWORD pixel;
BOOL got_pixel;
if (!init_hatch_brush( pdev, brush )) return FALSE;
if (brush->colorref & (1 << 24)) /* PALETTEINDEX */
*needs_reselect = TRUE;
rgb = make_rgb_colorref( pdev->dev.hdc, &pdev->dib, brush->colorref, &got_pixel, &pixel );
brush->dib.funcs->create_dither_masks( &brush->dib, brush->rop, rgb, &brush->masks );
return TRUE;
}
static BOOL matching_pattern_format( dib_info *dib, dib_info *pattern )
{
if (dib->bit_count != pattern->bit_count) return FALSE;
if (dib->stride != pattern->stride) return FALSE;
switch (dib->bit_count)
{
case 1:
case 4:
case 8:
if (dib->color_table_size != pattern->color_table_size) return FALSE;
return !memcmp( dib->color_table, pattern->color_table, dib->color_table_size * sizeof(RGBQUAD) );
case 16:
case 32:
return (dib->red_mask == pattern->red_mask &&
dib->green_mask == pattern->green_mask &&
dib->blue_mask == pattern->blue_mask);
}
return TRUE;
}
static BOOL select_pattern_brush( dibdrv_physdev *pdev, dib_brush *brush, BOOL *needs_reselect )
{
char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *info = (BITMAPINFO *)buffer;
RGBQUAD color_table[2];
dib_info pattern;
BOOL dither = (brush->dib.bit_count == 1);
if (pattern.bit_count == 1 && !pattern.color_table)
dither = FALSE; /* monochrome DDB pattern brushes don't get dithered */
if (brush->pattern.info->bmiHeader.biClrUsed && brush->pattern.usage == DIB_PAL_COLORS)
{
copy_bitmapinfo( info, brush->pattern.info );
fill_color_table_from_pal_colors( info, pdev->dev.hdc );
init_dib_info_from_bitmapinfo( &pattern, info, brush->pattern.bits.ptr );
*needs_reselect = TRUE;
}
else
{
init_dib_info_from_bitmapinfo( &pattern, brush->pattern.info, brush->pattern.bits.ptr );
}
if (pattern.bit_count == 1 && !pattern.color_table &&
(pdev->dib.bit_count != 1 || pdev->dib.color_table))
{
/* monochrome DDB pattern uses DC colors */
DWORD pixel;
BOOL got_pixel;
COLORREF color;
color = make_rgb_colorref( pdev->dev.hdc, &pdev->dib, GetTextColor( pdev->dev.hdc ),
&got_pixel, &pixel );
color_table[0].rgbRed = GetRValue( color );
color_table[0].rgbGreen = GetGValue( color );
color_table[0].rgbBlue = GetBValue( color );
color_table[0].rgbReserved = 0;
color = make_rgb_colorref( pdev->dev.hdc, &pdev->dib, GetBkColor( pdev->dev.hdc ),
&got_pixel, &pixel );
color_table[1].rgbRed = GetRValue( color );
color_table[1].rgbGreen = GetGValue( color );
color_table[1].rgbBlue = GetBValue( color );
color_table[1].rgbReserved = 0;
pattern.color_table = color_table;
pattern.color_table_size = 2;
*needs_reselect = TRUE;
}
copy_dib_color_info(&brush->dib, &pdev->dib);
brush->dib.height = pattern.height;
brush->dib.width = pattern.width;
brush->dib.stride = get_dib_stride( brush->dib.width, brush->dib.bit_count );
brush->dib.rect = pattern.rect;
if (!dither && matching_pattern_format( &brush->dib, &pattern ))
{
brush->dib.bits.ptr = pattern.bits.ptr;
brush->dib.bits.is_copy = FALSE;
brush->dib.bits.free = NULL;
}
else
{
brush->dib.bits.ptr = HeapAlloc( GetProcessHeap(), 0, brush->dib.height * brush->dib.stride );
brush->dib.bits.is_copy = TRUE;
brush->dib.bits.free = free_heap_bits;
brush->dib.funcs->convert_to(&brush->dib, &pattern, &pattern.rect, dither);
}
return TRUE;
}
/**********************************************************************
* pattern_brush
*
* Fill a number of rectangles with the pattern brush
* FIXME: Should we insist l < r && t < b? Currently we assume this.
*/
static BOOL pattern_brush(dibdrv_physdev *pdev, dib_brush *brush, dib_info *dib,
int num, const RECT *rects, INT rop)
{
POINT origin;
BOOL needs_reselect = FALSE;
if (rop != brush->rop)
{
free_brush_mask_bits( brush );
brush->rop = rop;
}
if(brush->masks.and == NULL)
{
switch(brush->style)
{
case BS_DIBPATTERN:
if (!brush->dib.bits.ptr && !select_pattern_brush( pdev, brush, &needs_reselect ))
return FALSE;
if(!create_pattern_brush_bits( brush ))
return FALSE;
break;
case BS_SOLID:
if(!create_dither_brush_bits(pdev, brush, &needs_reselect))
return FALSE;
break;
case BS_HATCHED:
if(!create_hatch_brush_bits(pdev, brush, &needs_reselect))
return FALSE;
break;
default:
ERR("Unexpected brush style %d\n", brush->style);
return FALSE;
}
}
GetBrushOrgEx(pdev->dev.hdc, &origin);
dib->funcs->pattern_rects( dib, num, rects, &origin, &brush->dib, &brush->masks );
if (needs_reselect) free_pattern_brush( brush );
return TRUE;
}
static BOOL null_brush(dibdrv_physdev *pdev, dib_brush *brush, dib_info *dib,
int num, const RECT *rects, INT rop)
{
return TRUE;
}
static BOOL brush_needs_dithering( dibdrv_physdev *pdev, COLORREF color )
{
int i;
RGBQUAD rgb;
const RGBQUAD *color_table = get_default_color_table( pdev->dib.bit_count );
if (!color_table) return FALSE;
if (pdev->dib.color_table) return FALSE;
if (color & (1 << 24)) return TRUE; /* PALETTEINDEX */
if (color >> 16 == 0x10ff) return FALSE; /* DIBINDEX */
rgb = rgbquad_from_colorref( color );
for (i = 0; i < (1 << pdev->dib.bit_count); i++)
if (rgbquad_equal( &color_table[i], &rgb )) return FALSE;
return TRUE;
}
static void select_brush( dibdrv_physdev *pdev, dib_brush *brush,
const LOGBRUSH *logbrush, const struct brush_pattern *pattern )
{
free_pattern_brush( brush );
if (pattern)
{
brush->style = BS_DIBPATTERN;
brush->pattern = *pattern; /* brush is actually selected only when it's used */
brush->rects = pattern_brush;
}
else
{
brush->style = logbrush->lbStyle;
brush->colorref = logbrush->lbColor;
brush->hatch = logbrush->lbHatch;
switch (logbrush->lbStyle)
{
case BS_NULL: brush->rects = null_brush; break;
case BS_HATCHED: brush->rects = pattern_brush; break;
case BS_SOLID:
brush->rects = brush_needs_dithering( pdev, brush->colorref ) ? pattern_brush : solid_brush;
break;
}
}
}
/***********************************************************************
* dibdrv_SelectBrush
*/
HBRUSH dibdrv_SelectBrush( PHYSDEV dev, HBRUSH hbrush, const struct brush_pattern *pattern )
{
dibdrv_physdev *pdev = get_dibdrv_pdev(dev);
LOGBRUSH logbrush;
TRACE("(%p, %p)\n", dev, hbrush);
GetObjectW( hbrush, sizeof(logbrush), &logbrush );
if (hbrush == GetStockObject( DC_BRUSH ))
logbrush.lbColor = GetDCBrushColor( dev->hdc );
select_brush( pdev, &pdev->brush, &logbrush, pattern );
return hbrush;
}
/***********************************************************************
* dibdrv_SelectPen
*/
HPEN dibdrv_SelectPen( PHYSDEV dev, HPEN hpen, const struct brush_pattern *pattern )
{
dibdrv_physdev *pdev = get_dibdrv_pdev(dev);
LOGPEN logpen;
LOGBRUSH logbrush;
EXTLOGPEN *elp = NULL;
TRACE("(%p, %p)\n", dev, hpen);
if (!GetObjectW( hpen, sizeof(logpen), &logpen ))
{
/* must be an extended pen */
INT size = GetObjectW( hpen, 0, NULL );
if (!size) return 0;
elp = HeapAlloc( GetProcessHeap(), 0, size );
GetObjectW( hpen, size, elp );
logpen.lopnStyle = elp->elpPenStyle;
logpen.lopnWidth.x = elp->elpWidth;
/* cosmetic ext pens are always 1-pixel wide */
if (!(logpen.lopnStyle & PS_GEOMETRIC)) logpen.lopnWidth.x = 0;
logbrush.lbStyle = elp->elpBrushStyle;
logbrush.lbColor = elp->elpColor;
logbrush.lbHatch = elp->elpHatch;
}
else
{
logbrush.lbStyle = BS_SOLID;
logbrush.lbColor = logpen.lopnColor;
logbrush.lbHatch = 0;
}
pdev->pen_join = logpen.lopnStyle & PS_JOIN_MASK;
pdev->pen_endcap = logpen.lopnStyle & PS_ENDCAP_MASK;
pdev->pen_width = get_pen_device_width( pdev, logpen.lopnWidth.x );
if (hpen == GetStockObject( DC_PEN ))
logbrush.lbColor = GetDCPenColor( dev->hdc );
set_dash_pattern( &pdev->pen_pattern, 0, NULL );
select_brush( pdev, &pdev->pen_brush, &logbrush, pattern );
pdev->pen_style = logpen.lopnStyle & PS_STYLE_MASK;
switch (pdev->pen_style)
{
case PS_DASH:
case PS_DOT:
case PS_DASHDOT:
case PS_DASHDOTDOT:
if (logpen.lopnStyle & PS_GEOMETRIC)
{
pdev->pen_pattern = dash_patterns_geometric[pdev->pen_style - 1];
if (pdev->pen_width > 1)
{
scale_dash_pattern( &pdev->pen_pattern, pdev->pen_width, pdev->pen_endcap );
pdev->pen_lines = dashed_wide_pen_lines;
}
else pdev->pen_lines = dashed_pen_lines;
break;
}
if (pdev->pen_width == 1) /* wide cosmetic pens are not dashed */
{
pdev->pen_lines = dashed_pen_lines;
pdev->pen_pattern = dash_patterns_cosmetic[pdev->pen_style - 1];
break;
}
/* fall through */
case PS_SOLID:
case PS_INSIDEFRAME:
pdev->pen_lines = (pdev->pen_width == 1) ? solid_pen_lines : wide_pen_lines;
break;
case PS_NULL:
pdev->pen_width = 0;
pdev->pen_lines = null_pen_lines;
break;
case PS_ALTERNATE:
pdev->pen_lines = dashed_pen_lines;
pdev->pen_pattern = dash_patterns_geometric[PS_DOT - 1];
break;
case PS_USERSTYLE:
pdev->pen_lines = (pdev->pen_width == 1) ? dashed_pen_lines : dashed_wide_pen_lines;
set_dash_pattern( &pdev->pen_pattern, elp->elpNumEntries, elp->elpStyleEntry );
if (!(logpen.lopnStyle & PS_GEOMETRIC)) scale_dash_pattern( &pdev->pen_pattern, 3, PS_ENDCAP_FLAT );
break;
}
pdev->pen_uses_region = (logpen.lopnStyle & PS_GEOMETRIC || pdev->pen_width > 1);
pdev->pen_is_ext = (elp != NULL);
HeapFree( GetProcessHeap(), 0, elp );
return hpen;
}
/***********************************************************************
* dibdrv_SetDCBrushColor
*/
COLORREF dibdrv_SetDCBrushColor( PHYSDEV dev, COLORREF color )
{
dibdrv_physdev *pdev = get_dibdrv_pdev(dev);
if (GetCurrentObject(dev->hdc, OBJ_BRUSH) == GetStockObject( DC_BRUSH ))
{
LOGBRUSH logbrush = { BS_SOLID, color, 0 };
select_brush( pdev, &pdev->brush, &logbrush, NULL );
}
return color;
}