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netsurf/amiga/plotters.c

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/*
* Copyright 2008-09, 2012-13 Chris Young <chris@unsatisfactorysoftware.co.uk>
*
* 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 "amiga/os3support.h"
#include <proto/exec.h>
#include <proto/intuition.h>
#include <intuition/intuition.h>
#include <graphics/rpattr.h>
#include <graphics/gfxmacros.h>
#include <graphics/gfxbase.h>
#ifdef __amigaos4__
#include <graphics/blitattr.h>
#include <graphics/composite.h>
#endif
#include <math.h>
#include <assert.h>
#include "utils/nsoption.h"
#include "utils/utils.h"
#include "utils/log.h"
#include "css/utils.h"
#include "desktop/mouse.h"
#include "desktop/gui_window.h"
#include "amiga/plotters.h"
#include "amiga/bitmap.h"
#include "amiga/font.h"
#include "amiga/gui.h"
#include "amiga/misc.h"
#include "amiga/rtg.h"
#include "amiga/utf8.h"
HOOKF(void, ami_bitmap_tile_hook, struct RastPort *, rp, struct BackFillMessage *);
struct bfbitmap {
struct BitMap *bm;
ULONG width;
ULONG height;
int offsetx;
int offsety;
APTR mask;
};
struct ami_plot_pen {
struct MinNode node;
ULONG pen;
};
struct bez_point {
float x;
float y;
};
static int init_layers_count = 0;
static APTR pool_pens = NULL;
#ifndef M_PI /* For some reason we don't always get this from math.h */
#define M_PI 3.14159265358979323846
#endif
#define PATT_DOT 0xAAAA
#define PATT_DASH 0xCCCC
#define PATT_LINE 0xFFFF
/* This defines the size of the list for Area* functions.
25000 = 5000 vectors
*/
#define AREA_SIZE 25000
/* Define the below to get additional debug */
#undef AMI_PLOTTER_DEBUG
void ami_init_layers(struct gui_globals *gg, ULONG width, ULONG height, bool force32bit)
{
/* init shared bitmaps *
* Height is set to screen width to give enough space for thumbnails *
* Also applies to the further gfx/layers functions and memory below */
int depth = 32;
struct BitMap *friend = NULL;
if(force32bit == false) depth = GetBitMapAttr(scrn->RastPort.BitMap, BMA_DEPTH);
LOG("Screen depth = %d", depth);
if(depth < 16) {
gg->palette_mapped = true;
} else {
gg->palette_mapped = false;
}
#ifndef __amigaos4__
#warning OS3 locked to palette-mapped modes
gg->palette_mapped = true;
if(depth > 8) depth = 8;
#endif
/* Probably need to fix this next line */
if(gg->palette_mapped == true) nsoption_set_bool(font_antialiasing, false);
if(!width) width = nsoption_int(redraw_tile_size_x);
if(!height) height = nsoption_int(redraw_tile_size_y);
gg->width = width;
gg->height = height;
gg->layerinfo = NewLayerInfo();
gg->areabuf = AllocVecTagList(AREA_SIZE, NULL);
#ifdef __amigaos4__
gg->tmprasbuf = AllocVecTagList(width * height, NULL);
#else
/* OS3/AGA requires this to be in chip mem. RTG would probably rather it wasn't. */
gg->tmprasbuf = AllocVec(width * height, MEMF_CHIP);
#endif
/* Friend BitMaps are weird.
* For OS4, we shouldn't use a friend BitMap here (see below).
* For OS3 AGA, we get no display blitted if we use a friend BitMap,
* however on RTG it seems to be a benefit.
*/
#ifndef __amigaos4__
if(nsoption_bool(friend_bitmap) == true) {
friend = scrn->RastPort.BitMap;
} else {
/* Force friend BitMaps on for obvious RTG screens under OS3.
* If we get a bit smarter about this we can lose the user option. */
if((depth >= 16) && (force32bit == false)) friend = scrn->RastPort.BitMap;
}
#endif
if(gg->palette_mapped == true) {
gg->bm = AllocBitMap(width, height, depth, 0, friend);
} else {
#ifdef __amigaos4__
/* Screen depth is reported as 24 even when it's actually 32-bit.
* We get freezes and other problems on OS4 if we befriend at any
* other depths, hence this check.
*/
if((depth >= 24) && (force32bit == false)) friend = scrn->RastPort.BitMap;
#endif
gg->bm = ami_rtg_allocbitmap(width, height, 32, 0, friend, RGBFB_A8R8G8B8);
}
if(!gg->bm) warn_user("NoMemory","");
gg->rp = AllocVecTagList(sizeof(struct RastPort), NULL);
if(!gg->rp) warn_user("NoMemory","");
InitRastPort(gg->rp);
gg->rp->BitMap = gg->bm;
SetDrMd(gg->rp,BGBACKFILL);
gg->rp->Layer = CreateUpfrontLayer(gg->layerinfo,gg->rp->BitMap,0,0,
width-1, height-1, LAYERSIMPLE, NULL);
InstallLayerHook(gg->rp->Layer,LAYERS_NOBACKFILL);
gg->rp->AreaInfo = AllocVecTagList(sizeof(struct AreaInfo), NULL);
if((!gg->areabuf) || (!gg->rp->AreaInfo)) warn_user("NoMemory","");
InitArea(gg->rp->AreaInfo,gg->areabuf, AREA_SIZE/5);
gg->rp->TmpRas = AllocVecTagList(sizeof(struct TmpRas), NULL);
if((!gg->tmprasbuf) || (!gg->rp->TmpRas)) warn_user("NoMemory","");
InitTmpRas(gg->rp->TmpRas, gg->tmprasbuf, width*height);
if((gg->palette_mapped == true) && (pool_pens == NULL)) {
pool_pens = ami_misc_itempool_create(sizeof(struct ami_plot_pen));
}
gg->apen = 0x00000000;
gg->open = 0x00000000;
gg->apen_num = -1;
gg->open_num = -1;
init_layers_count++;
LOG("Layer initialised (total: %d)", init_layers_count);
}
void ami_free_layers(struct gui_globals *gg)
{
init_layers_count--;
if((init_layers_count == 0) && (pool_pens != NULL)) {
ami_misc_itempool_delete(pool_pens);
pool_pens = NULL;
}
if(gg->rp) {
DeleteLayer(0,gg->rp->Layer);
FreeVec(gg->rp->TmpRas);
FreeVec(gg->rp->AreaInfo);
FreeVec(gg->rp);
}
FreeVec(gg->tmprasbuf);
FreeVec(gg->areabuf);
DisposeLayerInfo(gg->layerinfo);
if(gg->palette_mapped == false) {
if(gg->bm) ami_rtg_freebitmap(gg->bm);
} else {
if(gg->bm) FreeBitMap(gg->bm);
}
}
void ami_clearclipreg(struct gui_globals *gg)
{
struct Region *reg = NULL;
reg = InstallClipRegion(gg->rp->Layer,NULL);
if(reg) DisposeRegion(reg);
gg->rect.MinX = 0;
gg->rect.MinY = 0;
gg->rect.MaxX = scrn->Width-1;
gg->rect.MaxY = scrn->Height-1;
}
static ULONG ami_plot_obtain_pen(struct MinList *shared_pens, ULONG colr)
{
struct ami_plot_pen *node;
LONG pen = ObtainBestPenA(scrn->ViewPort.ColorMap,
(colr & 0x000000ff) << 24,
(colr & 0x0000ff00) << 16,
(colr & 0x00ff0000) << 8,
NULL);
if(pen == -1) LOG("WARNING: Cannot allocate pen for ABGR:%lx", colr);
if((shared_pens != NULL) && (pool_pens != NULL)) {
if((node = (struct ami_plot_pen *)ami_misc_itempool_alloc(pool_pens, sizeof(struct ami_plot_pen)))) {
node->pen = pen;
AddTail((struct List *)shared_pens, (struct Node *)node);
}
} else {
/* Immediately release the pen if we can't keep track of it. */
ReleasePen(scrn->ViewPort.ColorMap, pen);
}
return pen;
}
void ami_plot_release_pens(struct MinList *shared_pens)
{
struct ami_plot_pen *node;
struct ami_plot_pen *nnode;
if(shared_pens == NULL) return;
if(IsMinListEmpty(shared_pens)) return;
node = (struct ami_plot_pen *)GetHead((struct List *)shared_pens);
do {
nnode = (struct ami_plot_pen *)GetSucc((struct Node *)node);
ReleasePen(scrn->ViewPort.ColorMap, node->pen);
Remove((struct Node *)node);
ami_misc_itempool_free(pool_pens, node, sizeof(struct ami_plot_pen));
} while((node = nnode));
glob->apen = 0x00000000;
glob->open = 0x00000000;
glob->apen_num = -1;
glob->open_num = -1;
}
static void ami_plot_setapen(struct RastPort *rp, ULONG colr)
{
if(glob->apen == colr) return;
#ifdef __amigaos4__
if(glob->palette_mapped == false) {
SetRPAttrs(rp, RPTAG_APenColor,
ns_color_to_nscss(colr),
TAG_DONE);
} else
#endif
{
LONG pen = ami_plot_obtain_pen(glob->shared_pens, colr);
if((pen != -1) && (pen != glob->apen_num)) SetAPen(rp, pen);
}
glob->apen = colr;
}
static void ami_plot_setopen(struct RastPort *rp, ULONG colr)
{
if(glob->open == colr) return;
#ifdef __amigaos4__
if(glob->palette_mapped == false) {
SetRPAttrs(rp, RPTAG_OPenColor,
ns_color_to_nscss(colr),
TAG_DONE);
} else
#endif
{
LONG pen = ami_plot_obtain_pen(glob->shared_pens, colr);
if((pen != -1) && (pen != glob->open_num)) SetOPen(rp, pen);
}
glob->open = colr;
}
void ami_plot_clear_bbox(struct RastPort *rp, struct IBox *bbox)
{
if((bbox == NULL) || (rp == NULL)) return;
EraseRect(rp, bbox->Left, bbox->Top,
bbox->Width + bbox->Left, bbox->Height + bbox->Top);
}
static bool ami_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
{
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_rectangle()");
#endif
if (style->fill_type != PLOT_OP_TYPE_NONE) {
ami_plot_setapen(glob->rp, style->fill_colour);
RectFill(glob->rp, x0, y0, x1-1, y1-1);
}
if (style->stroke_type != PLOT_OP_TYPE_NONE) {
glob->rp->PenWidth = style->stroke_width;
glob->rp->PenHeight = style->stroke_width;
switch (style->stroke_type) {
case PLOT_OP_TYPE_SOLID: /**< Solid colour */
default:
glob->rp->LinePtrn = PATT_LINE;
break;
case PLOT_OP_TYPE_DOT: /**< Dotted plot */
glob->rp->LinePtrn = PATT_DOT;
break;
case PLOT_OP_TYPE_DASH: /**< dashed plot */
glob->rp->LinePtrn = PATT_DASH;
break;
}
ami_plot_setapen(glob->rp, style->stroke_colour);
Move(glob->rp, x0,y0);
Draw(glob->rp, x1, y0);
Draw(glob->rp, x1, y1);
Draw(glob->rp, x0, y1);
Draw(glob->rp, x0, y0);
glob->rp->PenWidth = 1;
glob->rp->PenHeight = 1;
glob->rp->LinePtrn = PATT_LINE;
}
return true;
}
static bool ami_line(int x0, int y0, int x1, int y1, const plot_style_t *style)
{
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_line()");
#endif
glob->rp->PenWidth = style->stroke_width;
glob->rp->PenHeight = style->stroke_width;
switch (style->stroke_type) {
case PLOT_OP_TYPE_SOLID: /**< Solid colour */
default:
glob->rp->LinePtrn = PATT_LINE;
break;
case PLOT_OP_TYPE_DOT: /**< Doted plot */
glob->rp->LinePtrn = PATT_DOT;
break;
case PLOT_OP_TYPE_DASH: /**< dashed plot */
glob->rp->LinePtrn = PATT_DASH;
break;
}
ami_plot_setapen(glob->rp, style->stroke_colour);
Move(glob->rp,x0,y0);
Draw(glob->rp,x1,y1);
glob->rp->PenWidth = 1;
glob->rp->PenHeight = 1;
glob->rp->LinePtrn = PATT_LINE;
return true;
}
static bool ami_polygon(const int *p, unsigned int n, const plot_style_t *style)
{
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_polygon()");
#endif
ami_plot_setapen(glob->rp, style->fill_colour);
if(AreaMove(glob->rp,p[0],p[1]) == -1)
LOG("AreaMove: vector list full");
for(uint32 k = 1; k < n; k++) {
if(AreaDraw(glob->rp,p[k*2],p[(k*2)+1]) == -1)
LOG("AreaDraw: vector list full");
}
if(AreaEnd(glob->rp) == -1)
LOG("AreaEnd: error");
return true;
}
static bool ami_clip(const struct rect *clip)
{
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_clip()");
#endif
struct Region *reg = NULL;
if(glob->rp->Layer)
{
reg = NewRegion();
glob->rect.MinX = clip->x0;
glob->rect.MinY = clip->y0;
glob->rect.MaxX = clip->x1-1;
glob->rect.MaxY = clip->y1-1;
OrRectRegion(reg,&glob->rect);
reg = InstallClipRegion(glob->rp->Layer,reg);
if(reg) DisposeRegion(reg);
}
return true;
}
static bool ami_text(int x, int y, const char *text, size_t length,
const plot_font_style_t *fstyle)
{
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_text()");
#endif
if(__builtin_expect(ami_nsfont == NULL, 0)) return false;
ami_plot_setapen(glob->rp, fstyle->foreground);
ami_nsfont->text(glob->rp, text, length, fstyle, x, y, nsoption_bool(font_antialiasing));
return true;
}
static bool ami_disc(int x, int y, int radius, const plot_style_t *style)
{
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_disc()");
#endif
if (style->fill_type != PLOT_OP_TYPE_NONE) {
ami_plot_setapen(glob->rp, style->fill_colour);
AreaCircle(glob->rp,x,y,radius);
AreaEnd(glob->rp);
}
if (style->stroke_type != PLOT_OP_TYPE_NONE) {
ami_plot_setapen(glob->rp, style->stroke_colour);
DrawEllipse(glob->rp,x,y,radius,radius);
}
return true;
}
static void ami_arc_gfxlib(int x, int y, int radius, int angle1, int angle2)
{
double angle1_r = (double)(angle1) * (M_PI / 180.0);
double angle2_r = (double)(angle2) * (M_PI / 180.0);
double angle, b, c;
double step = 0.1; //(angle2_r - angle1_r) / ((angle2_r - angle1_r) * (double)radius);
int x0, y0, x1, y1;
x0 = x;
y0 = y;
b = angle1_r;
c = angle2_r;
x1 = (int)(cos(b) * (double)radius);
y1 = (int)(sin(b) * (double)radius);
Move(glob->rp, x0 + x1, y0 - y1);
for(angle = (b + step); angle <= c; angle += step) {
x1 = (int)(cos(angle) * (double)radius);
y1 = (int)(sin(angle) * (double)radius);
Draw(glob->rp, x0 + x1, y0 - y1);
}
}
static bool ami_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *style)
{
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_arc()");
#endif
if (angle2 < angle1) angle2 += 360;
ami_plot_setapen(glob->rp, style->fill_colour);
ami_arc_gfxlib(x, y, radius, angle1, angle2);
return true;
}
static bool ami_bitmap(int x, int y, int width, int height, struct bitmap *bitmap)
{
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_bitmap()");
#endif
struct BitMap *tbm;
if(!width || !height) return true;
if(((x + width) < glob->rect.MinX) ||
((y + height) < glob->rect.MinY) ||
(x > glob->rect.MaxX) ||
(y > glob->rect.MaxY))
return true;
tbm = ami_bitmap_get_native(bitmap, width, height, glob->rp->BitMap);
if(!tbm) return true;
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] ami_bitmap() got native bitmap");
#endif
#ifdef __amigaos4__
if(__builtin_expect((GfxBase->LibNode.lib_Version >= 53) && (glob->palette_mapped == false) &&
(nsoption_bool(direct_render) == false), 1)) {
uint32 comptype = COMPOSITE_Src_Over_Dest;
uint32 compflags = COMPFLAG_IgnoreDestAlpha;
if(amiga_bitmap_get_opaque(bitmap)) {
compflags |= COMPFLAG_SrcAlphaOverride;
comptype = COMPOSITE_Src;
}
CompositeTags(comptype,tbm,glob->rp->BitMap,
COMPTAG_Flags, compflags,
COMPTAG_DestX,glob->rect.MinX,
COMPTAG_DestY,glob->rect.MinY,
COMPTAG_DestWidth,glob->rect.MaxX - glob->rect.MinX + 1,
COMPTAG_DestHeight,glob->rect.MaxY - glob->rect.MinY + 1,
COMPTAG_SrcWidth,width,
COMPTAG_SrcHeight,height,
COMPTAG_OffsetX,x,
COMPTAG_OffsetY,y,
COMPTAG_FriendBitMap, scrn->RastPort.BitMap,
TAG_DONE);
}
else
#endif
{
ULONG tag, tag_data, minterm = 0xc0;
if(glob->palette_mapped == false) {
tag = BLITA_UseSrcAlpha;
tag_data = !amiga_bitmap_get_opaque(bitmap);
minterm = 0xc0;
} else {
tag = BLITA_MaskPlane;
if((tag_data = (ULONG)ami_bitmap_get_mask(bitmap, width, height, tbm)))
minterm = MINTERM_SRCMASK;
}
#ifdef __amigaos4__
BltBitMapTags(BLITA_Width,width,
BLITA_Height,height,
BLITA_Source,tbm,
BLITA_Dest,glob->rp,
BLITA_DestX,x,
BLITA_DestY,y,
BLITA_SrcType,BLITT_BITMAP,
BLITA_DestType,BLITT_RASTPORT,
BLITA_Minterm, minterm,
tag, tag_data,
TAG_DONE);
#else
if(tag_data) {
BltMaskBitMapRastPort(tbm, 0, 0, glob->rp, x, y, width, height, minterm, tag_data);
} else {
BltBitMapRastPort(tbm, 0, 0, glob->rp, x, y, width, height, 0xc0);
}
#endif
}
if((ami_bitmap_has_dto(bitmap) == false) && (ami_bitmap_is_nativebm(bitmap, tbm) == false)) {
/**\todo is this logic logical? */
ami_rtg_freebitmap(tbm);
}
return true;
}
static bool ami_bitmap_tile(int x, int y, int width, int height,
struct bitmap *bitmap, colour bg,
bitmap_flags_t flags)
{
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_bitmap_tile()");
#endif
int xf,yf,xm,ym,oy,ox;
struct BitMap *tbm = NULL;
struct Hook *bfh = NULL;
struct bfbitmap bfbm;
bool repeat_x = (flags & BITMAPF_REPEAT_X);
bool repeat_y = (flags & BITMAPF_REPEAT_Y);
if((width == 0) || (height == 0)) return true;
if(!(repeat_x || repeat_y))
return ami_bitmap(x, y, width, height, bitmap);
/* If it is a one pixel transparent image, we are wasting our time */
if((amiga_bitmap_get_opaque(bitmap) == false) &&
(bitmap_get_width(bitmap) == 1) && (bitmap_get_height(bitmap) == 1))
return true;
tbm = ami_bitmap_get_native(bitmap,width,height,glob->rp->BitMap);
if(!tbm) return true;
ox = x;
oy = y;
/* get left most tile position */
for (; ox > 0; ox -= width)
;
/* get top most tile position */
for (; oy > 0; oy -= height)
;
if(ox<0) ox = -ox;
if(oy<0) oy = -oy;
if(repeat_x)
{
xf = glob->rect.MaxX;
xm = glob->rect.MinX;
}
else
{
xf = x + width;
xm = x;
}
if(repeat_y)
{
yf = glob->rect.MaxY;
ym = glob->rect.MinY;
}
else
{
yf = y + height;
ym = y;
}
#ifdef __amigaos4__
if(amiga_bitmap_get_opaque(bitmap))
{
bfh = CreateBackFillHook(BFHA_BitMap,tbm,
BFHA_Width,width,
BFHA_Height,height,
BFHA_OffsetX,ox,
BFHA_OffsetY,oy,
TAG_DONE);
}
else
#endif
{
bfbm.bm = tbm;
bfbm.width = width;
bfbm.height = height;
bfbm.offsetx = ox;
bfbm.offsety = oy;
bfbm.mask = ami_bitmap_get_mask(bitmap, width, height, tbm);
bfh = ami_misc_allocvec_clear(sizeof(struct Hook), 0); /* NB: Was not MEMF_PRIVATE */
bfh->h_Entry = (HOOKFUNC)ami_bitmap_tile_hook;
bfh->h_SubEntry = 0;
bfh->h_Data = &bfbm;
}
InstallLayerHook(glob->rp->Layer,bfh);
EraseRect(glob->rp,xm,ym,xf,yf);
InstallLayerHook(glob->rp->Layer,LAYERS_NOBACKFILL);
#ifdef __amigaos4__
if(amiga_bitmap_get_opaque(bitmap)) DeleteBackFillHook(bfh);
else
#endif
FreeVec(bfh);
if((ami_bitmap_has_dto(bitmap) == false) && (ami_bitmap_is_nativebm(bitmap, tbm) == false)) {
/**\todo is this logic logical? */
ami_rtg_freebitmap(tbm);
}
return true;
}
HOOKF(void, ami_bitmap_tile_hook, struct RastPort *, rp, struct BackFillMessage *)
{
int xf,yf;
struct bfbitmap *bfbm = (struct bfbitmap *)hook->h_Data;
/* tile down and across to extents (msg->Bounds.MinX)*/
for (xf = -bfbm->offsetx; xf < msg->Bounds.MaxX; xf += bfbm->width) {
for (yf = -bfbm->offsety; yf < msg->Bounds.MaxY; yf += bfbm->height) {
#ifdef __amigaos4__
if(__builtin_expect((GfxBase->LibNode.lib_Version >= 53) &&
(glob->palette_mapped == false), 1)) {
CompositeTags(COMPOSITE_Src_Over_Dest, bfbm->bm, rp->BitMap,
COMPTAG_Flags, COMPFLAG_IgnoreDestAlpha,
COMPTAG_DestX, msg->Bounds.MinX,
COMPTAG_DestY, msg->Bounds.MinY,
COMPTAG_DestWidth, msg->Bounds.MaxX - msg->Bounds.MinX + 1,
COMPTAG_DestHeight, msg->Bounds.MaxY - msg->Bounds.MinY + 1,
COMPTAG_SrcWidth, bfbm->width,
COMPTAG_SrcHeight, bfbm->height,
COMPTAG_OffsetX, xf,
COMPTAG_OffsetY, yf,
COMPTAG_FriendBitMap, scrn->RastPort.BitMap,
TAG_DONE);
}
else
#endif
{
ULONG tag, tag_data, minterm = 0xc0;
if(glob->palette_mapped == false) {
tag = BLITA_UseSrcAlpha;
tag_data = TRUE;
minterm = 0xc0;
} else {
tag = BLITA_MaskPlane;
if((tag_data = (ULONG)bfbm->mask))
minterm = MINTERM_SRCMASK;
}
#ifdef __amigaos4__
BltBitMapTags(BLITA_Width, bfbm->width,
BLITA_Height, bfbm->height,
BLITA_Source, bfbm->bm,
BLITA_Dest, rp,
BLITA_DestX, xf,
BLITA_DestY, yf,
BLITA_SrcType, BLITT_BITMAP,
BLITA_DestType, BLITT_RASTPORT,
BLITA_Minterm, minterm,
tag, tag_data,
TAG_DONE);
#else
if(tag_data) {
BltMaskBitMapRastPort(bfbm->bm, 0, 0, rp, xf, yf,
bfbm->width, bfbm->height, minterm, tag_data);
} else {
BltBitMapRastPort(bfbm->bm, 0, 0, rp, xf, yf,
bfbm->width, bfbm->height, minterm);
}
#endif
}
}
}
}
static void ami_bezier(struct bez_point *a, struct bez_point *b, struct bez_point *c,
struct bez_point *d, double t, struct bez_point *p) {
p->x = pow((1 - t), 3) * a->x + 3 * t * pow((1 -t), 2) * b->x + 3 * (1-t) * pow(t, 2)* c->x + pow (t, 3)* d->x;
p->y = pow((1 - t), 3) * a->y + 3 * t * pow((1 -t), 2) * b->y + 3 * (1-t) * pow(t, 2)* c->y + pow (t, 3)* d->y;
}
static bool ami_path(const float *p, unsigned int n, colour fill, float width,
colour c, const float transform[6])
{
unsigned int i;
struct bez_point start_p = {0, 0}, cur_p = {0, 0}, p_a, p_b, p_c, p_r;
#ifdef AMI_PLOTTER_DEBUG
LOG("[ami_plotter] Entered ami_path()");
#endif
if (n == 0)
return true;
if (p[0] != PLOTTER_PATH_MOVE) {
LOG("Path does not start with move");
return false;
}
if (fill != NS_TRANSPARENT) {
ami_plot_setapen(glob->rp, fill);
if (c != NS_TRANSPARENT)
ami_plot_setopen(glob->rp, c);
} else {
if (c != NS_TRANSPARENT) {
ami_plot_setapen(glob->rp, c);
} else {
return true; /* wholly transparent */
}
}
/* Construct path */
for (i = 0; i < n; ) {
if (p[i] == PLOTTER_PATH_MOVE) {
if (fill != NS_TRANSPARENT) {
if(AreaMove(glob->rp, p[i+1], p[i+2]) == -1)
LOG("AreaMove: vector list full");
} else {
Move(glob->rp, p[i+1], p[i+2]);
}
/* Keep track for future Bezier curves/closes etc */
start_p.x = p[i+1];
start_p.y = p[i+2];
cur_p.x = start_p.x;
cur_p.y = start_p.y;
i += 3;
} else if (p[i] == PLOTTER_PATH_CLOSE) {
if (fill != NS_TRANSPARENT) {
if(AreaEnd(glob->rp) == -1)
LOG("AreaEnd: error");
} else {
Draw(glob->rp, start_p.x, start_p.y);
}
i++;
} else if (p[i] == PLOTTER_PATH_LINE) {
if (fill != NS_TRANSPARENT) {
if(AreaDraw(glob->rp, p[i+1], p[i+2]) == -1)
LOG("AreaDraw: vector list full");
} else {
Draw(glob->rp, p[i+1], p[i+2]);
}
cur_p.x = p[i+1];
cur_p.y = p[i+2];
i += 3;
} else if (p[i] == PLOTTER_PATH_BEZIER) {
p_a.x = p[i+1];
p_a.y = p[i+2];
p_b.x = p[i+3];
p_b.y = p[i+4];
p_c.x = p[i+5];
p_c.y = p[i+6];
for(double t = 0.0; t <= 1.0; t += 0.1) {
ami_bezier(&cur_p, &p_a, &p_b, &p_c, t, &p_r);
if (fill != NS_TRANSPARENT) {
if(AreaDraw(glob->rp, p_r.x, p_r.y) == -1)
LOG("AreaDraw: vector list full");
} else {
Draw(glob->rp, p_r.x, p_r.y);
}
}
cur_p.x = p_c.x;
cur_p.y = p_c.y;
i += 7;
} else {
LOG("bad path command %f", p[i]);
/* End path for safety if using Area commands */
if (fill != NS_TRANSPARENT) {
AreaEnd(glob->rp);
BNDRYOFF(glob->rp);
}
return false;
}
}
if (fill != NS_TRANSPARENT)
BNDRYOFF(glob->rp);
return true;
}
bool ami_plot_screen_is_palettemapped(void)
{
return glob->palette_mapped;
}
struct plotter_table plot;
const struct plotter_table amiplot = {
.rectangle = ami_rectangle,
.line = ami_line,
.polygon = ami_polygon,
.clip = ami_clip,
.text = ami_text,
.disc = ami_disc,
.arc = ami_arc,
.bitmap = ami_bitmap_tile,
.path = ami_path,
.option_knockout = true,
};
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