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/*
* Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
* Copyright 2009 Mark Benjamin <netsurf-browser.org.MarkBenjamin@dfgh.net>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#include <limits.h>
#include <math.h>
#include <windows.h>
#include "utils/log.h"
#include "utils/utf8.h"
#include "utils/utils.h"
#include "desktop/gui.h"
#include "desktop/plotters.h"
#include "windows/bitmap.h"
#include "windows/font.h"
#include "windows/gui.h"
#include "windows/plot.h"
/* set NSWS_PLOT_DEBUG to 0 for no debugging, 1 for debugging */
/* #define NSWS_PLOT_DEBUG */
#ifdef NSWS_PLOT_DEBUG
#define PLOT_LOG(x) LOG(x)
#else
#define PLOT_LOG(x)
#endif
HDC plot_hdc;
static RECT plot_clip; /* currently set clipping rectangle */
static bool clip(const struct rect *clip)
{
PLOT_LOG(("clip %d,%d to %d,%d", clip->x0, clip->y0, clip->x1, clip->y1));
plot_clip.left = clip->x0;
plot_clip.top = clip->y0;
plot_clip.right = clip->x1 + 1; /* co-ordinates are exclusive */
plot_clip.bottom = clip->y1 + 1; /* co-ordinates are exclusive */
return true;
}
static bool line(int x0, int y0, int x1, int y1, const plot_style_t *style)
{
PLOT_LOG(("from %d,%d to %d,%d", x0, y0, x1, y1));
/* ensure the plot HDC is set */
if (plot_hdc == NULL) {
LOG(("HDC not set on call to plotters"));
return false;
}
HRGN clipregion = CreateRectRgnIndirect(&plot_clip);
if (clipregion == NULL) {
return false;
}
COLORREF col = (DWORD)(style->stroke_colour & 0x00FFFFFF);
/* windows 0x00bbggrr */
DWORD penstyle = PS_GEOMETRIC | ((style->stroke_type ==
PLOT_OP_TYPE_DOT) ? PS_DOT :
(style->stroke_type == PLOT_OP_TYPE_DASH) ? PS_DASH:
0);
LOGBRUSH lb = {BS_SOLID, col, 0};
HPEN pen = ExtCreatePen(penstyle, style->stroke_width, &lb, 0, NULL);
if (pen == NULL) {
DeleteObject(clipregion);
return false;
}
HGDIOBJ bak = SelectObject(plot_hdc, (HGDIOBJ) pen);
if (bak == NULL) {
DeleteObject(pen);
DeleteObject(clipregion);
return false;
}
RECT r;
r.left = x0;
r.top = y0;
r.right = x1;
r.bottom = y1;
SelectClipRgn(plot_hdc, clipregion);
MoveToEx(plot_hdc, x0, y0, (LPPOINT) NULL);
LineTo(plot_hdc, x1, y1);
SelectClipRgn(plot_hdc, NULL);
pen = SelectObject(plot_hdc, bak);
DeleteObject(pen);
DeleteObject(clipregion);
return true;
}
static bool rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
{
PLOT_LOG(("rectangle from %d,%d to %d,%d", x0, y0, x1, y1));
/* ensure the plot HDC is set */
if (plot_hdc == NULL) {
LOG(("HDC not set on call to plotters"));
return false;
}
HRGN clipregion = CreateRectRgnIndirect(&plot_clip);
if (clipregion == NULL) {
return false;
}
x1++;
y1++;
COLORREF pencol = (DWORD)(style->stroke_colour & 0x00FFFFFF);
DWORD penstyle = PS_GEOMETRIC |
(style->stroke_type == PLOT_OP_TYPE_DOT ? PS_DOT :
(style->stroke_type == PLOT_OP_TYPE_DASH ? PS_DASH :
(style->stroke_type == PLOT_OP_TYPE_NONE ? PS_NULL :
0)));
LOGBRUSH lb = {BS_SOLID, pencol, 0};
LOGBRUSH lb1 = {BS_SOLID, style->fill_colour, 0};
if (style->fill_type == PLOT_OP_TYPE_NONE)
lb1.lbStyle = BS_HOLLOW;
HPEN pen = ExtCreatePen(penstyle, style->stroke_width, &lb, 0, NULL);
if (pen == NULL) {
return false;
}
HGDIOBJ penbak = SelectObject(plot_hdc, (HGDIOBJ) pen);
if (penbak == NULL) {
DeleteObject(pen);
return false;
}
HBRUSH brush = CreateBrushIndirect(&lb1);
if (brush == NULL) {
SelectObject(plot_hdc, penbak);
DeleteObject(pen);
return false;
}
HGDIOBJ brushbak = SelectObject(plot_hdc, (HGDIOBJ) brush);
if (brushbak == NULL) {
SelectObject(plot_hdc, penbak);
DeleteObject(pen);
DeleteObject(brush);
return false;
}
SelectClipRgn(plot_hdc, clipregion);
Rectangle(plot_hdc, x0, y0, x1, y1);
pen = SelectObject(plot_hdc, penbak);
brush = SelectObject(plot_hdc, brushbak);
SelectClipRgn(plot_hdc, NULL);
DeleteObject(pen);
DeleteObject(brush);
DeleteObject(clipregion);
return true;
}
static bool polygon(const int *p, unsigned int n, const plot_style_t *style)
{
PLOT_LOG(("polygon %d points", n));
/* ensure the plot HDC is set */
if (plot_hdc == NULL) {
LOG(("HDC not set on call to plotters"));
return false;
}
POINT points[n];
unsigned int i;
HRGN clipregion = CreateRectRgnIndirect(&plot_clip);
if (clipregion == NULL) {
return false;
}
COLORREF pencol = (DWORD)(style->fill_colour & 0x00FFFFFF);
COLORREF brushcol = (DWORD)(style->fill_colour & 0x00FFFFFF);
HPEN pen = CreatePen(PS_GEOMETRIC | PS_NULL, 1, pencol);
if (pen == NULL) {
DeleteObject(clipregion);
return false;
}
HPEN penbak = SelectObject(plot_hdc, pen);
if (penbak == NULL) {
DeleteObject(clipregion);
DeleteObject(pen);
return false;
}
HBRUSH brush = CreateSolidBrush(brushcol);
if (brush == NULL) {
DeleteObject(clipregion);
SelectObject(plot_hdc, penbak);
DeleteObject(pen);
return false;
}
HBRUSH brushbak = SelectObject(plot_hdc, brush);
if (brushbak == NULL) {
DeleteObject(clipregion);
SelectObject(plot_hdc, penbak);
DeleteObject(pen);
DeleteObject(brush);
return false;
}
SetPolyFillMode(plot_hdc, WINDING);
for (i = 0; i < n; i++) {
points[i].x = (long) p[2 * i];
points[i].y = (long) p[2 * i + 1];
PLOT_LOG(("%ld,%ld ", points[i].x, points[i].y));
}
SelectClipRgn(plot_hdc, clipregion);
if (n >= 2)
Polygon(plot_hdc, points, n);
SelectClipRgn(plot_hdc, NULL);
pen = SelectObject(plot_hdc, penbak);
brush = SelectObject(plot_hdc, brushbak);
DeleteObject(clipregion);
DeleteObject(pen);
DeleteObject(brush);
return true;
}
static bool text(int x, int y, const char *text, size_t length,
const plot_font_style_t *style)
{
PLOT_LOG(("words %s at %d,%d", text, x, y));
/* ensure the plot HDC is set */
if (plot_hdc == NULL) {
LOG(("HDC not set on call to plotters"));
return false;
}
HRGN clipregion = CreateRectRgnIndirect(&plot_clip);
if (clipregion == NULL) {
return false;
}
HFONT fontbak, font = get_font(style);
if (font == NULL) {
DeleteObject(clipregion);
return false;
}
int wlen;
SIZE s;
LPWSTR wstring;
RECT r;
fontbak = (HFONT) SelectObject(plot_hdc, font);
GetTextExtentPoint(plot_hdc, text, length, &s);
r.left = x;
r.top = y - (3 * s.cy) / 4;
r.right = x + s.cx;
r.bottom = y + s.cy / 4;
SelectClipRgn(plot_hdc, clipregion);
SetTextAlign(plot_hdc, TA_BASELINE | TA_LEFT);
if ((style->background & 0xFF000000) != 0x01000000)
/* 100% alpha */
SetBkColor(plot_hdc, (DWORD) (style->background & 0x00FFFFFF));
SetBkMode(plot_hdc, TRANSPARENT);
SetTextColor(plot_hdc, (DWORD) (style->foreground & 0x00FFFFFF));
wlen = MultiByteToWideChar(CP_UTF8, 0, text, length, NULL, 0);
wstring = malloc(2 * (wlen + 1));
if (wstring == NULL) {
return false;
}
MultiByteToWideChar(CP_UTF8, 0, text, length, wstring, wlen);
TextOutW(plot_hdc, x, y, wstring, wlen);
SelectClipRgn(plot_hdc, NULL);
free(wstring);
font = SelectObject(plot_hdc, fontbak);
DeleteObject(clipregion);
DeleteObject(font);
return true;
}
static bool disc(int x, int y, int radius, const plot_style_t *style)
{
PLOT_LOG(("disc at %d,%d radius %d", x, y, radius));
/* ensure the plot HDC is set */
if (plot_hdc == NULL) {
LOG(("HDC not set on call to plotters"));
return false;
}
HRGN clipregion = CreateRectRgnIndirect(&plot_clip);
if (clipregion == NULL) {
return false;
}
COLORREF col = (DWORD)((style->fill_colour | style->stroke_colour)
& 0x00FFFFFF);
HPEN pen = CreatePen(PS_GEOMETRIC | PS_SOLID, 1, col);
if (pen == NULL) {
DeleteObject(clipregion);
return false;
}
HGDIOBJ penbak = SelectObject(plot_hdc, (HGDIOBJ) pen);
if (penbak == NULL) {
DeleteObject(clipregion);
DeleteObject(pen);
return false;
}
HBRUSH brush = CreateSolidBrush(col);
if (brush == NULL) {
DeleteObject(clipregion);
SelectObject(plot_hdc, penbak);
DeleteObject(pen);
return false;
}
HGDIOBJ brushbak = SelectObject(plot_hdc, (HGDIOBJ) brush);
if (brushbak == NULL) {
DeleteObject(clipregion);
SelectObject(plot_hdc, penbak);
DeleteObject(pen);
DeleteObject(brush);
return false;
}
RECT r;
r.left = x - radius;
r.top = y - radius;
r.right = x + radius;
r.bottom = y + radius;
SelectClipRgn(plot_hdc, clipregion);
if (style->fill_type == PLOT_OP_TYPE_NONE)
Arc(plot_hdc, x - radius, y - radius, x + radius, y + radius,
x - radius, y - radius,
x - radius, y - radius);
else
Ellipse(plot_hdc, x - radius, y - radius, x + radius, y + radius);
SelectClipRgn(plot_hdc, NULL);
pen = SelectObject(plot_hdc, penbak);
brush = SelectObject(plot_hdc, brushbak);
DeleteObject(clipregion);
DeleteObject(pen);
DeleteObject(brush);
return true;
}
static bool arc(int x, int y, int radius, int angle1, int angle2,
const plot_style_t *style)
{
PLOT_LOG(("arc centre %d,%d radius %d from %d to %d", x, y, radius,
angle1, angle2));
/* ensure the plot HDC is set */
if (plot_hdc == NULL) {
LOG(("HDC not set on call to plotters"));
return false;
}
HRGN clipregion = CreateRectRgnIndirect(&plot_clip);
if (clipregion == NULL) {
return false;
}
COLORREF col = (DWORD)(style->stroke_colour & 0x00FFFFFF);
HPEN pen = CreatePen(PS_GEOMETRIC | PS_SOLID, 1, col);
if (pen == NULL) {
DeleteObject(clipregion);
return false;
}
HGDIOBJ penbak = SelectObject(plot_hdc, (HGDIOBJ) pen);
if (penbak == NULL) {
DeleteObject(clipregion);
DeleteObject(pen);
return false;
}
RECT r;
int q1, q2;
double a1=1.0, a2=1.0, b1=1.0, b2=1.0;
q1 = (int) ((angle1 + 45) / 90) - 45;
q2 = (int) ((angle2 + 45) / 90) - 45;
while (q1 > 4)
q1 -= 4;
while (q2 > 4)
q2 -= 4;
while (q1 <= 0)
q1 += 4;
while (q2 <= 0)
q2 += 4;
angle1 = ((angle1 + 45) % 90) - 45;
angle2 = ((angle2 + 45) % 90) - 45;
switch(q1) {
case 1:
a1 = 1.0;
b1 = -tan((M_PI / 180) * angle1);
break;
case 2:
b1 = -1.0;
a1 = -tan((M_PI / 180) * angle1);
break;
case 3:
a1 = -1.0;
b1 = tan((M_PI / 180) * angle1);
break;
case 4:
b1 = 1.0;
a1 = tan((M_PI / 180) * angle1);
break;
}
switch(q2) {
case 1:
a2 = 1.0;
b2 = -tan((M_PI / 180) * angle2);
break;
case 2:
b2 = -1.0;
a2 = -tan((M_PI / 180) * angle2);
break;
case 3:
a2 = -1.0;
b2 = tan((M_PI / 180) * angle2);
break;
case 4:
b2 = 1.0;
a2 = tan((M_PI / 180) * angle2);
break;
}
r.left = x - radius;
r.top = y - radius;
r.right = x + radius;
r.bottom = y + radius;
SelectClipRgn(plot_hdc, clipregion);
Arc(plot_hdc, x - radius, y - radius, x + radius, y + radius,
x + (int)(a1 * radius), y + (int)(b1 * radius),
x + (int)(a2 * radius), y + (int)(b2 * radius));
SelectClipRgn(plot_hdc, NULL);
pen = SelectObject(plot_hdc, penbak);
DeleteObject(clipregion);
DeleteObject(pen);
return true;
}
static bool
plot_block(COLORREF col, int x, int y, int width, int height)
{
HRGN clipregion;
HGDIOBJ original = NULL;
/* Bail early if we can */
if ((x >= plot_clip.right) ||
((x + width) < plot_clip.left) ||
(y >= plot_clip.bottom) ||
((y + height) < plot_clip.top)) {
/* Image completely outside clip region */
return true;
}
/* ensure the plot HDC is set */
if (plot_hdc == NULL) {
LOG(("HDC not set on call to plotters"));
return false;
}
clipregion = CreateRectRgnIndirect(&plot_clip);
if (clipregion == NULL) {
return false;
}
SelectClipRgn(plot_hdc, clipregion);
/* Saving the original pen object */
original = SelectObject(plot_hdc,GetStockObject(DC_PEN));
SelectObject(plot_hdc, GetStockObject(DC_PEN));
SelectObject(plot_hdc, GetStockObject(DC_BRUSH));
SetDCPenColor(plot_hdc, col);
SetDCBrushColor(plot_hdc, col);
Rectangle(plot_hdc, x, y, width, height);
SelectObject(plot_hdc,original); /* Restoring the original pen object */
DeleteObject(clipregion);
return true;
}
/* blunt force truma way of achiving alpha blended plotting */
static bool
plot_alpha_bitmap(HDC hdc,
struct bitmap *bitmap,
int x, int y,
int width, int height)
{
#ifdef WINDOWS_GDI_ALPHA_WORKED
BLENDFUNCTION blnd = { AC_SRC_OVER, 0, 0xff, AC_SRC_ALPHA };
HDC bmihdc;
bool bltres;
bmihdc = CreateCompatibleDC(hdc);
SelectObject(bmihdc, bitmap->windib);
bltres = AlphaBlend(hdc,
x, y,
width, height,
bmihdc,
0, 0,
bitmap->width, bitmap->height,
blnd);
DeleteDC(bmihdc);
return bltres;
#else
HDC Memhdc;
BITMAPINFOHEADER bmih;
int v, vv, vi, h, hh, width4, transparency;
unsigned char alpha;
bool isscaled = false; /* set if the scaled bitmap requires freeing */
BITMAP MemBM;
BITMAPINFO *bmi;
HBITMAP MemBMh;
PLOT_LOG(("%p bitmap %d,%d width %d height %d", bitmap, x, y, width, height));
PLOT_LOG(("clipped %ld,%ld to %ld,%ld",plot_clip.left, plot_clip.top, plot_clip.right, plot_clip.bottom));
Memhdc = CreateCompatibleDC(hdc);
if (Memhdc == NULL) {
return false;
}
if ((bitmap->width != width) ||
(bitmap->height != height)) {
PLOT_LOG(("scaling from %d,%d to %d,%d",
bitmap->width, bitmap->height, width, height));
bitmap = bitmap_scale(bitmap, width, height);
if (bitmap == NULL)
return false;
isscaled = true;
}
bmi = (BITMAPINFO *) malloc(sizeof(BITMAPINFOHEADER) +
(bitmap->width * bitmap->height * 4));
if (bmi == NULL) {
DeleteDC(Memhdc);
return false;
}
MemBMh = CreateCompatibleBitmap(hdc, bitmap->width, bitmap->height);
if (MemBMh == NULL){
free(bmi);
DeleteDC(Memhdc);
return false;
}
/* save 'background' data for alpha channel work */
SelectObject(Memhdc, MemBMh);
BitBlt(Memhdc, 0, 0, bitmap->width, bitmap->height, hdc, x, y, SRCCOPY);
GetObject(MemBMh, sizeof(BITMAP), &MemBM);
bmih.biSize = sizeof(bmih);
bmih.biWidth = bitmap->width;
bmih.biHeight = bitmap->height;
bmih.biPlanes = 1;
bmih.biBitCount = 32;
bmih.biCompression = BI_RGB;
bmih.biSizeImage = 4 * bitmap->height * bitmap->width;
bmih.biXPelsPerMeter = 3600; /* 100 dpi */
bmih.biYPelsPerMeter = 3600;
bmih.biClrUsed = 0;
bmih.biClrImportant = 0;
bmi->bmiHeader = bmih;
GetDIBits(hdc, MemBMh, 0, bitmap->height, bmi->bmiColors, bmi,
DIB_RGB_COLORS);
/* then load 'foreground' bits from bitmap->pixdata */
width4 = bitmap->width * 4;
for (v = 0, vv = 0, vi = (bitmap->height - 1) * width4;
v < bitmap->height;
v++, vv += bitmap->width, vi -= width4) {
for (h = 0, hh = 0; h < bitmap->width; h++, hh += 4) {
alpha = bitmap->pixdata[vi + hh + 3];
/* multiplication of alpha value; subject to profiling could be optional */
if (alpha == 0xFF) {
bmi->bmiColors[vv + h].rgbBlue =
bitmap->pixdata[vi + hh + 2];
bmi->bmiColors[vv + h].rgbGreen =
bitmap->pixdata[vi + hh + 1];
bmi->bmiColors[vv + h].rgbRed =
bitmap->pixdata[vi + hh];
} else if (alpha > 0) {
transparency = 0x100 - alpha;
bmi->bmiColors[vv + h].rgbBlue =
(bmi->bmiColors[vv + h].rgbBlue
* transparency +
(bitmap->pixdata[vi + hh + 2]) *
alpha) >> 8;
bmi->bmiColors[vv + h].rgbGreen =
(bmi->bmiColors[vv + h].
rgbGreen
* transparency +
(bitmap->pixdata[vi + hh + 1]) *
alpha) >> 8;
bmi->bmiColors[vv + h].rgbRed =
(bmi->bmiColors[vv + h].rgbRed
* transparency +
bitmap->pixdata[vi + hh]
* alpha) >> 8;
}
}
}
SetDIBitsToDevice(hdc, x, y, bitmap->width, bitmap->height,
0, 0, 0, bitmap->height,
(const void *) bmi->bmiColors,
bmi, DIB_RGB_COLORS);
if (isscaled && bitmap && bitmap->pixdata) {
free(bitmap->pixdata);
free(bitmap);
}
free(bmi);
DeleteObject(MemBMh);
DeleteDC(Memhdc);
return true;
#endif
}
static bool
plot_bitmap(struct bitmap *bitmap, int x, int y, int width, int height)
{
int bltres;
HRGN clipregion;
/* Bail early if we can */
if ((x >= plot_clip.right) ||
((x + width) < plot_clip.left) ||
(y >= plot_clip.bottom) ||
((y + height) < plot_clip.top)) {
/* Image completely outside clip region */
return true;
}
/* ensure the plot HDC is set */
if (plot_hdc == NULL) {
LOG(("HDC not set on call to plotters"));
return false;
}
clipregion = CreateRectRgnIndirect(&plot_clip);
if (clipregion == NULL) {
return false;
}
SelectClipRgn(plot_hdc, clipregion);
if (bitmap->opaque) {
/* opaque bitmap */
if ((bitmap->width == width) &&
(bitmap->height == height)) {
/* unscaled */
bltres = SetDIBitsToDevice(plot_hdc,
x, y,
width, height,
0, 0,
0,
height,
bitmap->pixdata,
(BITMAPINFO *)bitmap->pbmi,
DIB_RGB_COLORS);
} else {
/* scaled */
SetStretchBltMode(plot_hdc, COLORONCOLOR);
bltres = StretchDIBits(plot_hdc,
x, y,
width, height,
0, 0,
bitmap->width, bitmap->height,
bitmap->pixdata,
(BITMAPINFO *)bitmap->pbmi,
DIB_RGB_COLORS,
SRCCOPY);
}
} else {
/* Bitmap with alpha.*/
bltres = plot_alpha_bitmap(plot_hdc, bitmap, x, y, width, height);
}
PLOT_LOG(("bltres = %d", bltres));
DeleteObject(clipregion);
return true;
}
static bool
windows_plot_bitmap(int x, int y,
int width, int height,
struct bitmap *bitmap, colour bg,
bitmap_flags_t flags)
{
int xf,yf;
bool repeat_x = (flags & BITMAPF_REPEAT_X);
bool repeat_y = (flags & BITMAPF_REPEAT_Y);
/* Bail early if we can */
PLOT_LOG(("Plotting %p at %d,%d by %d,%d",bitmap, x,y,width,height));
if (bitmap == NULL) {
LOG(("Passed null bitmap!"));
return true;
}
/* check if nothing to plot */
if (width == 0 || height == 0)
return true;
/* x and y define coordinate of top left of of the initial explicitly
* placed tile. The width and height are the image scaling and the
* bounding box defines the extent of the repeat (which may go in all
* four directions from the initial tile).
*/
if (!(repeat_x || repeat_y)) {
/* Not repeating at all, so just plot it */
if ((bitmap->width == 1) && (bitmap->height == 1)) {
if ((*(bitmap->pixdata + 3) & 0xff) == 0) {
return true;
}
return plot_block((*(COLORREF *)bitmap->pixdata) & 0xffffff, x, y, x + width, y + height);
} else {
return plot_bitmap(bitmap, x, y, width, height);
}
}
/* Optimise tiled plots of 1x1 bitmaps by replacing with a flat fill
* of the area. Can only be done when image is fully opaque. */
if ((bitmap->width == 1) && (bitmap->height == 1)) {
if ((*(COLORREF *)bitmap->pixdata & 0xff000000) != 0) {
return plot_block((*(COLORREF *)bitmap->pixdata) & 0xffffff,
plot_clip.left,
plot_clip.top,
plot_clip.right,
plot_clip.bottom);
}
}
/* Optimise tiled plots of bitmaps scaled to 1x1 by replacing with
* a flat fill of the area. Can only be done when image is fully
* opaque. */
if ((width == 1) && (height == 1)) {
if (bitmap->opaque) {
/** TODO: Currently using top left pixel. Maybe centre
* pixel or average value would be better. */
return plot_block((*(COLORREF *)bitmap->pixdata) & 0xffffff,
plot_clip.left,
plot_clip.top,
plot_clip.right,
plot_clip.bottom);
}
}
PLOT_LOG(("Tiled plotting %d,%d by %d,%d",x,y,width,height));
PLOT_LOG(("clipped %ld,%ld to %ld,%ld",plot_clip.left, plot_clip.top, plot_clip.right, plot_clip.bottom));
/* get left most tile position */
if (repeat_x)
for (; x > plot_clip.left; x -= width);
/* get top most tile position */
if (repeat_y)
for (; y > plot_clip.top; y -= height);
PLOT_LOG(("repeat from %d,%d to %ld,%ld", x, y, plot_clip.right, plot_clip.bottom));
/* tile down and across to extents */
for (xf = x; xf < plot_clip.right; xf += width) {
for (yf = y; yf < plot_clip.bottom; yf += height) {
plot_bitmap(bitmap, xf, yf, width, height);
if (!repeat_y)
break;
}
if (!repeat_x)
break;
}
return true;
}
static bool flush(void)
{
PLOT_LOG(("flush unimplemented"));
return true;
}
static bool path(const float *p, unsigned int n, colour fill, float width,
colour c, const float transform[6])
{
PLOT_LOG(("path unimplemented"));
return true;
}
struct plotter_table plot = {
.rectangle = rectangle,
.line = line,
.polygon = polygon,
.clip = clip,
.text = text,
.disc = disc,
.arc = arc,
.bitmap = windows_plot_bitmap,
.flush = flush,
.path = path,
.option_knockout = true,
};
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