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netsurf/frontends/beos/plotters.cpp

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/*
* Copyright 2008 François Revol <mmu_man@users.sourceforge.net>
* Copyright 2006 Rob Kendrick <rjek@rjek.com>
* Copyright 2005 James Bursa <bursa@users.sourceforge.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/>.
*/
/**
* \file
* BeOS/Haiku implementation target independent plotting.
*/
#define __STDBOOL_H__ 1
#include <math.h>
#include <BeBuild.h>
#include <Bitmap.h>
#include <GraphicsDefs.h>
#include <Region.h>
#include <View.h>
#include <Shape.h>
extern "C" {
#include "utils/log.h"
#include "utils/utils.h"
#include "utils/nsoption.h"
#include "utils/nsurl.h"
#include "netsurf/plotters.h"
}
#include "beos/font.h"
#include "beos/gui.h"
#include "beos/plotters.h"
#include "beos/bitmap.h"
#warning MAKE ME static
/*static*/ BView *current_view;
/*
* NOTE: BeOS rects differ from NetSurf ones:
* the right-bottom pixel is actually part of the BRect!
*/
#warning make patterns nicer
static const pattern kDottedPattern = {
0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa, 0x55, 0xaa
};
static const pattern kDashedPattern = {
0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0x33, 0x33
};
static const rgb_color kBlackColor = {
0, 0, 0, 255
};
//struct plotter_table plot;
// #pragma mark - implementation
BView *nsbeos_current_gc(void)
{
return current_view;
}
BView *nsbeos_current_gc_lock(void)
{
BView *view = current_view;
if (view && view->LockLooper())
return view;
return NULL;
}
void nsbeos_current_gc_unlock(void)
{
if (current_view) {
current_view->UnlockLooper();
}
}
void nsbeos_current_gc_set(BView *view)
{
// XXX: (un)lock previous ?
current_view = view;
}
static nserror
nsbeos_plot_bbitmap(int x, int y, int width, int height, BBitmap *b, colour bg)
{
/* XXX: This currently ignores the background colour supplied.
* Does this matter?
*/
if (width == 0 || height == 0) {
return NSERROR_OK;
}
BView *view;
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
beos_warn_user("No GC", 0);
return NSERROR_INVALID;
}
drawing_mode oldmode = view->DrawingMode();
source_alpha alpha;
alpha_function func;
view->GetBlendingMode(&alpha, &func);
//view->SetDrawingMode(B_OP_OVER);
view->SetDrawingMode(B_OP_ALPHA);
view->SetBlendingMode(B_PIXEL_ALPHA, B_ALPHA_OVERLAY);
// XXX DrawBitmap() resamples if rect doesn't match,
// but doesn't do any filtering
// XXX: use Zeta API if available ?
BRect rect(x, y, x + width - 1, y + height - 1);
/*
rgb_color old = view->LowColor();
if (bg != NS_TRANSPARENT) {
view->SetLowColor(nsbeos_rgb_colour(bg));
view->FillRect(rect, B_SOLID_LOW);
}
*/
view->DrawBitmap(b, rect);
// maybe not needed?
//view->SetLowColor(old);
view->SetBlendingMode(alpha, func);
view->SetDrawingMode(oldmode);
//nsbeos_current_gc_unlock();
return NSERROR_OK;
}
static BPoint transform_pt(float x, float y, const float transform[6])
{
#warning XXX: verify
//return BPoint(x, y);
BPoint pt;
pt.x = x * transform[0] + y * transform[1] + transform[4];
pt.y = x * transform[2] + y * transform[3] + transform[5];
/*
printf("TR: {%f, %f} { %f, %f, %f, %f, %f, %f} = { %f, %f }\n",
x, y,
transform[0], transform[1], transform[2],
transform[3], transform[4], transform[5],
pt.x, pt.y);
*/
return pt;
}
rgb_color nsbeos_rgb_colour(colour c)
{
rgb_color color;
if (c == NS_TRANSPARENT)
return B_TRANSPARENT_32_BIT;
color.red = c & 0x0000ff;
color.green = (c & 0x00ff00) >> 8;
color.blue = (c & 0xff0000) >> 16;
return color;
}
void nsbeos_set_colour(colour c)
{
rgb_color color = nsbeos_rgb_colour(c);
BView *view = nsbeos_current_gc();
view->SetHighColor(color);
}
/**
* Plot a caret.
*
* It is assumed that the plotters have been set up.
*/
void nsbeos_plot_caret(int x, int y, int h)
{
BView *view;
view = nsbeos_current_gc/*_lock*/();
if (view == NULL)
/* TODO: report an error here */
return;
BPoint start(x, y);
BPoint end(x, y + h - 1);
#if defined(__HAIKU__) || defined(B_BEOS_VERSION_DANO)
view->SetHighColor(ui_color(B_DOCUMENT_TEXT_COLOR));
#else
view->SetHighColor(kBlackColor);
#endif
view->StrokeLine(start, end);
//nsbeos_current_gc_unlock();
}
/**
* \brief Sets a clip rectangle for subsequent plot operations.
*
* \param ctx The current redraw context.
* \param ns_clip The rectangle to limit all subsequent plot
* operations within.
* \return NSERROR_OK on success else error code.
*/
static nserror
nsbeos_plot_clip(const struct redraw_context *ctx, const struct rect *ns_clip)
{
BView *view;
//fprintf(stderr, "%s(%d, %d, %d, %d)\n", __FUNCTION__, clip_x0, clip_y0, clip_x1, clip_y1);
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
beos_warn_user("No GC", 0);
return NSERROR_INVALID;
}
BRect rect(ns_clip->x0, ns_clip->y0, ns_clip->x1 - 1, ns_clip->y1 - 1);
BRegion clip(rect);
view->ConstrainClippingRegion(NULL);
if (view->Bounds() != rect) {
view->ConstrainClippingRegion(&clip);
}
//nsbeos_current_gc_unlock();
return NSERROR_OK;
}
/**
* Plots an arc
*
* plot an arc segment around (x,y), anticlockwise from angle1
* to angle2. Angles are measured anticlockwise from
* horizontal, in degrees.
*
* \param ctx The current redraw context.
* \param style Style controlling the arc plot.
* \param x The x coordinate of the arc.
* \param y The y coordinate of the arc.
* \param radius The radius of the arc.
* \param angle1 The start angle of the arc.
* \param angle2 The finish angle of the arc.
* \return NSERROR_OK on success else error code.
*/
static nserror
nsbeos_plot_arc(const struct redraw_context *ctx,
const plot_style_t *style,
int x, int y, int radius, int angle1, int angle2)
{
BView *view;
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
beos_warn_user("No GC", 0);
return NSERROR_INVALID;
}
nsbeos_set_colour(style->fill_colour);
BPoint center(x, y);
float angle = angle1; // in degree
float span = angle2 - angle1; // in degree
view->StrokeArc(center, radius, radius, angle, span);
//nsbeos_current_gc_unlock();
return NSERROR_OK;
}
/**
* Plots a circle
*
* Plot a circle centered on (x,y), which is optionally filled.
*
* \param ctx The current redraw context.
* \param style Style controlling the circle plot.
* \param x x coordinate of circle centre.
* \param y y coordinate of circle centre.
* \param radius circle radius.
* \return NSERROR_OK on success else error code.
*/
static nserror
nsbeos_plot_disc(const struct redraw_context *ctx,
const plot_style_t *style,
int x, int y, int radius)
{
BView *view;
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
beos_warn_user("No GC", 0);
return NSERROR_INVALID;
}
nsbeos_set_colour(style->fill_colour);
BPoint center(x, y);
if (style->fill_type != PLOT_OP_TYPE_NONE)
view->FillEllipse(center, radius, radius);
else
view->StrokeEllipse(center, radius, radius);
//nsbeos_current_gc_unlock();
return NSERROR_OK;
}
/**
* Plots a line
*
* plot a line from (x0,y0) to (x1,y1). Coordinates are at
* centre of line width/thickness.
*
* \param ctx The current redraw context.
* \param style Style controlling the line plot.
* \param line A rectangle defining the line to be drawn
* \return NSERROR_OK on success else error code.
*/
static nserror
nsbeos_plot_line(const struct redraw_context *ctx,
const plot_style_t *style,
const struct rect *line)
{
pattern pat;
BView *view;
switch (style->stroke_type) {
case PLOT_OP_TYPE_SOLID: /**< Solid colour */
default:
pat = B_SOLID_HIGH;
break;
case PLOT_OP_TYPE_DOT: /**< Doted plot */
pat = kDottedPattern;
break;
case PLOT_OP_TYPE_DASH: /**< dashed plot */
pat = kDashedPattern;
break;
}
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
beos_warn_user("No GC", 0);
return NSERROR_OK;
}
nsbeos_set_colour(style->stroke_colour);
float pensize = view->PenSize();
view->SetPenSize(plot_style_fixed_to_float(style->stroke_width));
BPoint start(line->x0, line->y0);
BPoint end(line->x1, line->y1);
view->StrokeLine(start, end, pat);
view->SetPenSize(pensize);
//nsbeos_current_gc_unlock();
return NSERROR_OK;
}
/**
* Plots a rectangle.
*
* The rectangle can be filled an outline or both controlled
* by the plot style The line can be solid, dotted or
* dashed. Top left corner at (x0,y0) and rectangle has given
* width and height.
*
* \param ctx The current redraw context.
* \param style Style controlling the rectangle plot.
* \param nsrect A rectangle defining the line to be drawn
* \return NSERROR_OK on success else error code.
*/
static nserror
nsbeos_plot_rectangle(const struct redraw_context *ctx,
const plot_style_t *style,
const struct rect *nsrect)
{
if (style->fill_type != PLOT_OP_TYPE_NONE) {
BView *view;
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
beos_warn_user("No GC", 0);
return NSERROR_INVALID;
}
nsbeos_set_colour(style->fill_colour);
BRect rect(nsrect->x0, nsrect->y0, nsrect->x1 - 1, nsrect->y1 - 1);
view->FillRect(rect);
//nsbeos_current_gc_unlock();
}
if (style->stroke_type != PLOT_OP_TYPE_NONE) {
pattern pat;
BView *view;
switch (style->stroke_type) {
case PLOT_OP_TYPE_SOLID: /**< Solid colour */
default:
pat = B_SOLID_HIGH;
break;
case PLOT_OP_TYPE_DOT: /**< Doted plot */
pat = kDottedPattern;
break;
case PLOT_OP_TYPE_DASH: /**< dashed plot */
pat = kDashedPattern;
break;
}
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
beos_warn_user("No GC", 0);
return NSERROR_INVALID;
}
nsbeos_set_colour(style->stroke_colour);
float pensize = view->PenSize();
view->SetPenSize(plot_style_fixed_to_float(style->stroke_width));
BRect rect(nsrect->x0, nsrect->y0, nsrect->x1, nsrect->y1);
view->StrokeRect(rect, pat);
view->SetPenSize(pensize);
//nsbeos_current_gc_unlock();
}
return NSERROR_OK;
}
/**
* Plot a polygon
*
* Plots a filled polygon with straight lines between
* points. The lines around the edge of the ploygon are not
* plotted. The polygon is filled with the non-zero winding
* rule.
*
* \param ctx The current redraw context.
* \param style Style controlling the polygon plot.
* \param p verticies of polygon
* \param n number of verticies.
* \return NSERROR_OK on success else error code.
*/
static nserror
nsbeos_plot_polygon(const struct redraw_context *ctx,
const plot_style_t *style,
const int *p,
unsigned int n)
{
unsigned int i;
BView *view;
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
beos_warn_user("No GC", 0);
return NSERROR_INVALID;
}
nsbeos_set_colour(style->fill_colour);
BPoint points[n];
for (i = 0; i < n; i++) {
points[i] = BPoint(p[2 * i] - 0.5, p[2 * i + 1] - 0.5);
}
if (style->fill_colour == NS_TRANSPARENT) {
view->StrokePolygon(points, (int32)n);
} else {
view->FillPolygon(points, (int32)n);
}
return NSERROR_OK;
}
/**
* Plots a path.
*
* Path plot consisting of cubic Bezier curves. Line and fill colour is
* controlled by the plot style.
*
* \param ctx The current redraw context.
* \param pstyle Style controlling the path plot.
* \param p elements of path
* \param n nunber of elements on path
* \param transform A transform to apply to the path.
* \return NSERROR_OK on success else error code.
*/
static nserror
nsbeos_plot_path(const struct redraw_context *ctx,
const plot_style_t *pstyle,
const float *p,
unsigned int n,
const float transform[6])
{
unsigned int i;
BShape shape;
if (n == 0) {
return NSERROR_OK;
}
if (p[0] != PLOTTER_PATH_MOVE) {
NSLOG(netsurf, INFO, "path doesn't start with a move");
return NSERROR_INVALID;
}
for (i = 0; i < n; ) {
if (p[i] == PLOTTER_PATH_MOVE) {
BPoint pt(transform_pt(p[i + 1], p[i + 2], transform));
shape.MoveTo(pt);
i += 3;
} else if (p[i] == PLOTTER_PATH_CLOSE) {
shape.Close();
i++;
} else if (p[i] == PLOTTER_PATH_LINE) {
BPoint pt(transform_pt(p[i + 1], p[i + 2], transform));
shape.LineTo(pt);
i += 3;
} else if (p[i] == PLOTTER_PATH_BEZIER) {
BPoint pt[3] = {
transform_pt(p[i + 1], p[i + 2], transform),
transform_pt(p[i + 3], p[i + 4], transform),
transform_pt(p[i + 5], p[i + 6], transform)
};
shape.BezierTo(pt);
i += 7;
} else {
NSLOG(netsurf, INFO, "bad path command %f", p[i]);
return NSERROR_INVALID;
}
}
shape.Close();
BView *view;
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
return NSERROR_INVALID;
}
rgb_color old_high = view->HighColor();
float old_pen = view->PenSize();
view->SetPenSize(plot_style_fixed_to_float(pstyle->stroke_width));
view->MovePenTo(0, 0);
if (pstyle->fill_colour != NS_TRANSPARENT) {
view->SetHighColor(nsbeos_rgb_colour(pstyle->fill_colour));
view->FillShape(&shape);
}
if (pstyle->stroke_colour != NS_TRANSPARENT) {
view->SetHighColor(nsbeos_rgb_colour(pstyle->stroke_colour));
view->StrokeShape(&shape);
}
// restore
view->SetPenSize(old_pen);
view->SetHighColor(old_high);
//nsbeos_current_gc_unlock();
return NSERROR_OK;
}
/**
* Plot a bitmap
*
* Tiled plot of a bitmap image. (x,y) gives the top left
* coordinate of an explicitly placed tile. From this tile the
* image can repeat in all four directions -- up, down, left
* and right -- to the extents given by the current clip
* rectangle.
*
* The bitmap_flags say whether to tile in the x and y
* directions. If not tiling in x or y directions, the single
* image is plotted. The width and height give the dimensions
* the image is to be scaled to.
*
* \param ctx The current redraw context.
* \param bitmap The bitmap to plot
* \param x The x coordinate to plot the bitmap
* \param y The y coordiante to plot the bitmap
* \param width The width of area to plot the bitmap into
* \param height The height of area to plot the bitmap into
* \param bg the background colour to alpha blend into
* \param flags the flags controlling the type of plot operation
* \return NSERROR_OK on success else error code.
*/
static nserror
nsbeos_plot_bitmap(const struct redraw_context *ctx,
struct bitmap *bitmap,
int x, int y,
int width,
int height,
colour bg,
bitmap_flags_t flags)
{
int doneheight = 0, donewidth = 0;
BBitmap *primary;
BBitmap *pretiled;
bool repeat_x = (flags & BITMAPF_REPEAT_X);
bool repeat_y = (flags & BITMAPF_REPEAT_Y);
if (!(repeat_x || repeat_y)) {
/* Not repeating at all, so just plot it */
primary = nsbeos_bitmap_get_primary(bitmap);
return nsbeos_plot_bbitmap(x, y, width, height, primary, bg);
}
if (repeat_x && !repeat_y)
pretiled = nsbeos_bitmap_get_pretile_x(bitmap);
if (repeat_x && repeat_y)
pretiled = nsbeos_bitmap_get_pretile_xy(bitmap);
if (!repeat_x && repeat_y)
pretiled = nsbeos_bitmap_get_pretile_y(bitmap);
primary = nsbeos_bitmap_get_primary(bitmap);
/* use the primary and pretiled widths to scale the w/h provided */
width *= pretiled->Bounds().Width() + 1;
width /= primary->Bounds().Width() + 1;
height *= pretiled->Bounds().Height() + 1;
height /= primary->Bounds().Height() + 1;
BView *view;
view = nsbeos_current_gc/*_lock*/();
if (view == NULL) {
beos_warn_user("No GC", 0);
return NSERROR_INVALID;
}
// XXX: do we really need to use clipping reg ?
// I guess it's faster to not draw clipped out stuff...
BRect cliprect;
BRegion clipreg;
view->GetClippingRegion(&clipreg);
cliprect = clipreg.Frame();
//XXX: FIXME
if (y > cliprect.top) {
doneheight = ((int)cliprect.top - height) + ((y - (int)cliprect.top) % height);
} else {
doneheight = y;
}
while (doneheight < ((int)cliprect.bottom)) {
if (x > cliprect.left) {
donewidth = ((int)cliprect.left - width) + ((x - (int)cliprect.left) % width);
} else {
donewidth = x;
}
while (donewidth < (cliprect.right)) {
nsbeos_plot_bbitmap(donewidth, doneheight,
width, height, pretiled, bg);
donewidth += width;
if (!repeat_x) {
break;
}
}
doneheight += height;
if (!repeat_y) {
break;
}
}
#warning WRITEME
return NSERROR_OK;
}
/**
* Text plotting.
*
* \param ctx The current redraw context.
* \param fstyle plot style for this text
* \param x x coordinate
* \param y y coordinate
* \param text UTF-8 string to plot
* \param length length of string, in bytes
* \return NSERROR_OK on success else error code.
*/
static nserror
nsbeos_plot_text(const struct redraw_context *ctx,
const struct plot_font_style *fstyle,
int x,
int y,
const char *text,
size_t length)
{
if (!nsfont_paint(fstyle, text, length, x, y)) {
return NSERROR_INVALID;
}
return NSERROR_OK;
}
/**
* beos plotter operation table
*/
const struct plotter_table nsbeos_plotters = {
nsbeos_plot_clip,
nsbeos_plot_arc,
nsbeos_plot_disc,
nsbeos_plot_line,
nsbeos_plot_rectangle,
nsbeos_plot_polygon,
nsbeos_plot_path,
nsbeos_plot_bitmap,
nsbeos_plot_text,
NULL, // Group Start
NULL, // Group End
NULL, // Flush
true // option_knockout
};
#ifdef TEST_PLOTTERS
//
static void test_plotters(void)
{
int x0, y0;
int x1, y1;
struct rect r;
x0 = 5;
y0 = 5;
x1 = 35;
y1 = 6;
plot.line(x0, y0, x1, y1, 1, 0x0000ff00, false, false);
y0+=2; y1+=2;
plot.line(x0, y0, x1, y1, 1, 0x0000ff00, true, false);
y0+=2; y1+=2;
plot.line(x0, y0, x1, y1, 1, 0x0000ff00, false, true);
y0+=2; y1+=2;
plot.line(x0, y0, x1, y1, 1, 0x0000ff00, true, true);
y0+=10; y1+=20;
plot.fill(x0, y0, x1, y1, 0x00ff0000);
plot.rectangle(x0+10, y0+10, x1-x0+1, y1-y0+1, 2, 0x00ffff00, true, false);
y0+=30; y1+=30;
r.x0 = x0 + 2;
r.y0 = y0 + 2;
r.x1 = x1 - 2;
r.y1 = y1 - 2;
plot.clip(&r);
plot.fill(x0, y0, x1, y1, 0x00000000);
plot.disc(x1, y1, 8, 0x000000ff, false);
r.x0 = 0;
r.y0 = 0;
r.x1 = 300;
r.y1 = 300;
plot.clip(&r);
y0+=30; y1+=30;
}
#include <Application.h>
#include <View.h>
#include <Window.h>
class PTView : public BView {
public:
PTView(BRect frame) : BView(frame, "view", B_FOLLOW_NONE, B_WILL_DRAW) {};
virtual ~PTView() {};
virtual void Draw(BRect update)
{
test_plotters();
};
};
extern "C" void test_plotters_main(void);
void test_plotters_main(void)
{
BApplication app("application/x-vnd.NetSurf");
memcpy(&plot, &nsbeos_plotters, sizeof(plot));
BRect frame(0,0,300,300);
PTView *view = new PTView(frame);
frame.OffsetBySelf(100,100);
BWindow *win = new BWindow(frame, "NetSurfPlotterTest", B_TITLED_WINDOW, B_QUIT_ON_WINDOW_CLOSE);
win->AddChild(view);
nsbeos_current_gc_set(view);
win->Show();
app.Run();
}
#endif /* TEST_PLOTTERS */
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