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#include "fitz.h"
#define QUANT(x,a) (((int)((x) * (a))) / (a))
#define HSUBPIX 5.0
#define VSUBPIX 5.0
#define STACKSIZE 96
#define SMOOTHSCALE
typedef struct fz_drawdevice_s fz_drawdevice;
struct fz_drawdevice_s
{
fz_glyphcache *cache;
fz_gel *gel;
fz_ael *ael;
fz_pixmap *dest;
fz_bbox scissor;
int top;
struct {
fz_bbox scissor;
fz_pixmap *dest;
fz_pixmap *mask;
fz_blendmode blendmode;
int luminosity;
float alpha;
} stack[STACKSIZE];
};
static void
fz_drawfillpath(void *user, fz_path *path, int evenodd, fz_matrix ctm,
fz_colorspace *colorspace, float *color, float alpha)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
float expansion = fz_matrixexpansion(ctm);
float flatness = 0.3f / expansion;
unsigned char colorbv[FZ_MAXCOLORS + 1];
float colorfv[FZ_MAXCOLORS];
fz_bbox bbox;
int i;
fz_resetgel(dev->gel, dev->scissor);
fz_fillpath(dev->gel, path, ctm, flatness);
fz_sortgel(dev->gel);
bbox = fz_boundgel(dev->gel);
bbox = fz_intersectbbox(bbox, dev->scissor);
if (fz_isemptyrect(bbox))
return;
fz_convertcolor(colorspace, color, model, colorfv);
for (i = 0; i < model->n; i++)
colorbv[i] = colorfv[i] * 255;
colorbv[i] = alpha * 255;
fz_scanconvert(dev->gel, dev->ael, evenodd, bbox, dev->dest, colorbv);
}
static void
fz_drawstrokepath(void *user, fz_path *path, fz_strokestate *stroke, fz_matrix ctm,
fz_colorspace *colorspace, float *color, float alpha)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
float expansion = fz_matrixexpansion(ctm);
float flatness = 0.3f / expansion;
float linewidth = stroke->linewidth;
unsigned char colorbv[FZ_MAXCOLORS + 1];
float colorfv[FZ_MAXCOLORS];
fz_bbox bbox;
int i;
if (linewidth * expansion < 0.1f)
linewidth = 1 / expansion;
fz_resetgel(dev->gel, dev->scissor);
if (stroke->dashlen > 0)
fz_dashpath(dev->gel, path, stroke, ctm, flatness, linewidth);
else
fz_strokepath(dev->gel, path, stroke, ctm, flatness, linewidth);
fz_sortgel(dev->gel);
bbox = fz_boundgel(dev->gel);
bbox = fz_intersectbbox(bbox, dev->scissor);
if (fz_isemptyrect(bbox))
return;
fz_convertcolor(colorspace, color, model, colorfv);
for (i = 0; i < model->n; i++)
colorbv[i] = colorfv[i] * 255;
colorbv[i] = alpha * 255;
fz_scanconvert(dev->gel, dev->ael, 0, bbox, dev->dest, colorbv);
}
static void
fz_drawclippath(void *user, fz_path *path, int evenodd, fz_matrix ctm)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
float expansion = fz_matrixexpansion(ctm);
float flatness = 0.3f / expansion;
fz_pixmap *mask, *dest;
fz_bbox bbox;
if (dev->top == STACKSIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
fz_resetgel(dev->gel, dev->scissor);
fz_fillpath(dev->gel, path, ctm, flatness);
fz_sortgel(dev->gel);
bbox = fz_boundgel(dev->gel);
bbox = fz_intersectbbox(bbox, dev->scissor);
if (fz_isemptyrect(bbox) || fz_isrectgel(dev->gel))
{
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = nil;
dev->stack[dev->top].dest = nil;
dev->scissor = bbox;
dev->top++;
return;
}
mask = fz_newpixmapwithrect(nil, bbox);
dest = fz_newpixmapwithrect(model, bbox);
fz_clearpixmap(mask);
fz_clearpixmap(dest);
fz_scanconvert(dev->gel, dev->ael, evenodd, bbox, mask, nil);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->scissor = bbox;
dev->dest = dest;
dev->top++;
}
static void
fz_drawclipstrokepath(void *user, fz_path *path, fz_strokestate *stroke, fz_matrix ctm)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
float expansion = fz_matrixexpansion(ctm);
float flatness = 0.3f / expansion;
float linewidth = stroke->linewidth;
fz_pixmap *mask, *dest;
fz_bbox bbox;
if (dev->top == STACKSIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
if (linewidth * expansion < 0.1f)
linewidth = 1 / expansion;
fz_resetgel(dev->gel, dev->scissor);
if (stroke->dashlen > 0)
fz_dashpath(dev->gel, path, stroke, ctm, flatness, linewidth);
else
fz_strokepath(dev->gel, path, stroke, ctm, flatness, linewidth);
fz_sortgel(dev->gel);
bbox = fz_boundgel(dev->gel);
bbox = fz_intersectbbox(bbox, dev->scissor);
mask = fz_newpixmapwithrect(nil, bbox);
dest = fz_newpixmapwithrect(model, bbox);
fz_clearpixmap(mask);
fz_clearpixmap(dest);
if (!fz_isemptyrect(bbox))
fz_scanconvert(dev->gel, dev->ael, 0, bbox, mask, nil);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->scissor = bbox;
dev->dest = dest;
dev->top++;
}
static void
drawglyph(unsigned char *colorbv, fz_pixmap *dst, fz_pixmap *msk,
int xorig, int yorig, fz_bbox scissor)
{
unsigned char *dp, *mp;
fz_bbox bbox;
int x, y, w, h;
bbox = fz_boundpixmap(msk);
bbox.x0 += xorig;
bbox.y0 += yorig;
bbox.x1 += xorig;
bbox.y1 += yorig;
bbox = fz_intersectbbox(bbox, scissor); /* scissor < dst */
x = bbox.x0;
y = bbox.y0;
w = bbox.x1 - bbox.x0;
h = bbox.y1 - bbox.y0;
mp = msk->samples + ((y - msk->y - yorig) * msk->w + (x - msk->x - xorig));
dp = dst->samples + ((y - dst->y) * dst->w + (x - dst->x)) * dst->n;
assert(msk->n == 1);
while (h--)
{
if (dst->colorspace)
fz_paintspancolor(dp, mp, dst->n, w, colorbv);
else
fz_paintspan(dp, mp, 1, w, 255);
dp += dst->w * dst->n;
mp += msk->w;
}
}
static void
fz_drawfilltext(void *user, fz_text *text, fz_matrix ctm,
fz_colorspace *colorspace, float *color, float alpha)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
unsigned char colorbv[FZ_MAXCOLORS + 1];
float colorfv[FZ_MAXCOLORS];
fz_matrix tm, trm;
fz_pixmap *glyph;
int i, x, y, gid;
fz_convertcolor(colorspace, color, model, colorfv);
for (i = 0; i < model->n; i++)
colorbv[i] = colorfv[i] * 255;
colorbv[i] = alpha * 255;
tm = text->trm;
for (i = 0; i < text->len; i++)
{
gid = text->els[i].gid;
if (gid < 0)
continue;
tm.e = text->els[i].x;
tm.f = text->els[i].y;
trm = fz_concat(tm, ctm);
x = floorf(trm.e);
y = floorf(trm.f);
trm.e = QUANT(trm.e - floorf(trm.e), HSUBPIX);
trm.f = QUANT(trm.f - floorf(trm.f), VSUBPIX);
glyph = fz_renderglyph(dev->cache, text->font, gid, trm);
if (glyph)
{
drawglyph(colorbv, dev->dest, glyph, x, y, dev->scissor);
fz_droppixmap(glyph);
}
}
}
static void
fz_drawstroketext(void *user, fz_text *text, fz_strokestate *stroke, fz_matrix ctm,
fz_colorspace *colorspace, float *color, float alpha)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
unsigned char colorbv[FZ_MAXCOLORS + 1];
float colorfv[FZ_MAXCOLORS];
fz_matrix tm, trm;
fz_pixmap *glyph;
int i, x, y, gid;
fz_convertcolor(colorspace, color, model, colorfv);
for (i = 0; i < model->n; i++)
colorbv[i] = colorfv[i] * 255;
colorbv[i] = alpha * 255;
tm = text->trm;
for (i = 0; i < text->len; i++)
{
gid = text->els[i].gid;
if (gid < 0)
continue;
tm.e = text->els[i].x;
tm.f = text->els[i].y;
trm = fz_concat(tm, ctm);
x = floorf(trm.e);
y = floorf(trm.f);
trm.e = QUANT(trm.e - floorf(trm.e), HSUBPIX);
trm.f = QUANT(trm.f - floorf(trm.f), VSUBPIX);
glyph = fz_renderstrokedglyph(dev->cache, text->font, gid, trm, ctm, stroke);
if (glyph)
{
drawglyph(colorbv, dev->dest, glyph, x, y, dev->scissor);
fz_droppixmap(glyph);
}
}
}
static void
fz_drawcliptext(void *user, fz_text *text, fz_matrix ctm, int accumulate)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_bbox bbox;
fz_pixmap *mask, *dest;
fz_matrix tm, trm;
fz_pixmap *glyph;
int i, x, y, gid;
/* If accumulate == 0 then this text object is guaranteed complete */
/* If accumulate == 1 then this text object is the first (or only) in a sequence */
/* If accumulate == 2 then this text object is a continuation */
if (dev->top == STACKSIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
if (accumulate == 0)
{
/* make the mask the exact size needed */
bbox = fz_roundrect(fz_boundtext(text, ctm));
bbox = fz_intersectbbox(bbox, dev->scissor);
}
else
{
/* be conservative about the size of the mask needed */
bbox = dev->scissor;
}
if (accumulate == 0 || accumulate == 1)
{
mask = fz_newpixmapwithrect(nil, bbox);
dest = fz_newpixmapwithrect(model, bbox);
fz_clearpixmap(mask);
fz_clearpixmap(dest);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->scissor = bbox;
dev->dest = dest;
dev->top++;
}
else
{
mask = dev->stack[dev->top-1].mask;
}
if (!fz_isemptyrect(bbox))
{
tm = text->trm;
for (i = 0; i < text->len; i++)
{
gid = text->els[i].gid;
if (gid < 0)
continue;
tm.e = text->els[i].x;
tm.f = text->els[i].y;
trm = fz_concat(tm, ctm);
x = floorf(trm.e);
y = floorf(trm.f);
trm.e = QUANT(trm.e - floorf(trm.e), HSUBPIX);
trm.f = QUANT(trm.f - floorf(trm.f), VSUBPIX);
glyph = fz_renderglyph(dev->cache, text->font, gid, trm);
if (glyph)
{
drawglyph(nil, mask, glyph, x, y, bbox);
fz_droppixmap(glyph);
}
}
}
}
static void
fz_drawclipstroketext(void *user, fz_text *text, fz_strokestate *stroke, fz_matrix ctm)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_bbox bbox;
fz_pixmap *mask, *dest;
fz_matrix tm, trm;
fz_pixmap *glyph;
int i, x, y, gid;
if (dev->top == STACKSIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
/* make the mask the exact size needed */
bbox = fz_roundrect(fz_boundtext(text, ctm));
bbox = fz_intersectbbox(bbox, dev->scissor);
mask = fz_newpixmapwithrect(nil, bbox);
dest = fz_newpixmapwithrect(model, bbox);
fz_clearpixmap(mask);
fz_clearpixmap(dest);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->scissor = bbox;
dev->dest = dest;
dev->top++;
if (!fz_isemptyrect(bbox))
{
tm = text->trm;
for (i = 0; i < text->len; i++)
{
gid = text->els[i].gid;
if (gid < 0)
continue;
tm.e = text->els[i].x;
tm.f = text->els[i].y;
trm = fz_concat(tm, ctm);
x = floorf(trm.e);
y = floorf(trm.f);
trm.e = QUANT(trm.e - floorf(trm.e), HSUBPIX);
trm.f = QUANT(trm.f - floorf(trm.f), VSUBPIX);
glyph = fz_renderstrokedglyph(dev->cache, text->font, gid, trm, ctm, stroke);
if (glyph)
{
drawglyph(nil, mask, glyph, x, y, bbox);
fz_droppixmap(glyph);
}
}
}
}
static void
fz_drawignoretext(void *user, fz_text *text, fz_matrix ctm)
{
}
static void
fz_drawfillshade(void *user, fz_shade *shade, fz_matrix ctm, float alpha)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_pixmap *dest = dev->dest;
fz_rect bounds;
fz_bbox bbox, scissor;
float colorfv[FZ_MAXCOLORS];
unsigned char colorbv[FZ_MAXCOLORS + 1];
bounds = fz_boundshade(shade, ctm);
bbox = fz_intersectbbox(fz_roundrect(bounds), dev->scissor);
scissor = dev->scissor;
// TODO: proper clip by shade->bbox
if (fz_isemptyrect(bbox))
return;
if (!model)
{
fz_warn("cannot render shading directly to an alpha mask");
return;
}
if (alpha < 1)
{
dest = fz_newpixmapwithrect(dev->dest->colorspace, bbox);
fz_clearpixmap(dest);
}
if (shade->usebackground)
{
unsigned char *s;
int x, y, n, i;
fz_convertcolor(shade->colorspace, shade->background, model, colorfv);
for (i = 0; i < model->n; i++)
colorbv[i] = colorfv[i] * 255;
colorbv[i] = 255;
n = dest->n;
for (y = scissor.y0; y < scissor.y1; y++)
{
s = dest->samples + ((scissor.x0 - dest->x) + (y - dest->y) * dest->w) * dest->n;
for (x = scissor.x0; x < scissor.x1; x++)
{
for (i = 0; i < n; i++)
*s++ = colorbv[i];
}
}
}
fz_paintshade(shade, ctm, dest, bbox);
if (alpha < 1)
{
fz_paintpixmap(dev->dest, dest, alpha * 255);
fz_droppixmap(dest);
}
}
static int
fz_calcimagescale(fz_pixmap *image, fz_matrix ctm, int *dx, int *dy)
{
float sx = image->w / sqrtf(ctm.a * ctm.a + ctm.b * ctm.b) * 0.66f;
float sy = image->h / sqrtf(ctm.c * ctm.c + ctm.d * ctm.d) * 0.66f;
*dx = sx > 1 ? sx : 1;
*dy = sy > 1 ? sy : 1;
return *dx > 1 || *dy > 1;
}
static fz_pixmap *
fz_smoothtransformpixmap(fz_pixmap *image, fz_matrix *ctm, int x, int y, int dx, int dy)
{
fz_pixmap *scaled;
if ((ctm->a != 0) && (ctm->b == 0) && (ctm->c == 0) && (ctm->d != 0))
{
/* Unrotated or X flip or Yflip or XYflip */
scaled = fz_smoothscalepixmap(image, ctm->e, ctm->f, ctm->a, ctm->d);
if (scaled == nil)
return nil;
ctm->a = scaled->w;
ctm->d = scaled->h;
ctm->e = scaled->x;
ctm->f = scaled->y;
return scaled;
}
if ((ctm->a == 0) && (ctm->b != 0) && (ctm->c != 0) && (ctm->d == 0))
{
/* Other orthogonal flip/rotation cases */
scaled = fz_smoothscalepixmap(image, ctm->f, ctm->e, ctm->b, ctm->c);
if (scaled == nil)
return nil;
ctm->b = scaled->w;
ctm->c = scaled->h;
ctm->f = scaled->x;
ctm->e = scaled->y;
return scaled;
}
/* Downscale, non rectilinear case */
if ((dx > 0) && (dy > 0))
{
scaled = fz_smoothscalepixmap(image, 0, 0, (float)dx, (float)dy);
return scaled;
}
return nil;
}
static void
fz_drawfillimage(void *user, fz_pixmap *image, fz_matrix ctm, float alpha)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_pixmap *converted = nil;
fz_pixmap *scaled = nil;
int dx, dy;
if (!model)
{
fz_warn("cannot render image directly to an alpha mask");
return;
}
if (image->w == 0 || image->h == 0)
return;
if (image->colorspace != model)
{
converted = fz_newpixmap(model, image->x, image->y, image->w, image->h);
fz_convertpixmap(image, converted);
image = converted;
}
#ifdef SMOOTHSCALE
dx = sqrtf(ctm.a * ctm.a + ctm.b * ctm.b);
dy = sqrtf(ctm.c * ctm.c + ctm.d * ctm.d);
if (dx < image->w || dy < image->h)
{
scaled = fz_smoothtransformpixmap(image, &ctm, dev->dest->x, dev->dest->y, dx, dy);
if (scaled == nil)
{
if (dx < 1)
dx = 1;
if (dy < 1)
dy = 1;
scaled = fz_smoothscalepixmap(image, image->x, image->y, dx, dy);
}
if (scaled != nil)
image = scaled;
}
#else
if (fz_calcimagescale(image, ctm, &dx, &dy))
{
scaled = fz_scalepixmap(image, dx, dy);
image = scaled;
}
#endif
fz_paintimage(dev->dest, dev->scissor, image, ctm, alpha * 255);
if (scaled)
fz_droppixmap(scaled);
if (converted)
fz_droppixmap(converted);
}
static void
fz_drawfillimagemask(void *user, fz_pixmap *image, fz_matrix ctm,
fz_colorspace *colorspace, float *color, float alpha)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
unsigned char colorbv[FZ_MAXCOLORS + 1];
float colorfv[FZ_MAXCOLORS];
fz_pixmap *scaled = nil;
int dx, dy;
int i;
if (image->w == 0 || image->h == 0)
return;
#ifdef SMOOTHSCALE
dx = sqrtf(ctm.a * ctm.a + ctm.b * ctm.b);
dy = sqrtf(ctm.c * ctm.c + ctm.d * ctm.d);
if (dx < image->w || dy < image->h)
{
scaled = fz_smoothtransformpixmap(image, &ctm, dev->dest->x, dev->dest->y, dx, dy);
if (scaled == nil)
{
if (dx < 1)
dx = 1;
if (dy < 1)
dy = 1;
scaled = fz_smoothscalepixmap(image, image->x, image->y, dx, dy);
}
if (scaled != nil)
image = scaled;
}
#else
if (fz_calcimagescale(image, ctm, &dx, &dy))
{
scaled = fz_scalepixmap(image, dx, dy);
image = scaled;
}
#endif
fz_convertcolor(colorspace, color, model, colorfv);
for (i = 0; i < model->n; i++)
colorbv[i] = colorfv[i] * 255;
colorbv[i] = alpha * 255;
fz_paintimagecolor(dev->dest, dev->scissor, image, ctm, colorbv);
if (scaled)
fz_droppixmap(scaled);
}
static void
fz_drawclipimagemask(void *user, fz_pixmap *image, fz_matrix ctm)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_bbox bbox;
fz_pixmap *mask, *dest;
fz_pixmap *scaled = nil;
int dx, dy;
if (dev->top == STACKSIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
if (image->w == 0 || image->h == 0)
{
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = nil;
dev->stack[dev->top].dest = nil;
dev->scissor = fz_emptybbox;
dev->top++;
return;
}
bbox = fz_roundrect(fz_transformrect(ctm, fz_unitrect));
bbox = fz_intersectbbox(bbox, dev->scissor);
mask = fz_newpixmapwithrect(nil, bbox);
dest = fz_newpixmapwithrect(model, bbox);
fz_clearpixmap(mask);
fz_clearpixmap(dest);
#ifdef SMOOTHSCALE
dx = sqrtf(ctm.a * ctm.a + ctm.b * ctm.b);
dy = sqrtf(ctm.c * ctm.c + ctm.d * ctm.d);
if (dx < image->w || dy < image->h)
{
scaled = fz_smoothtransformpixmap(image, &ctm, dev->dest->x, dev->dest->y, dx, dy);
if (scaled == nil)
{
if (dx < 1)
dx = 1;
if (dy < 1)
dy = 1;
scaled = fz_smoothscalepixmap(image, image->x, image->y, dx, dy);
}
if (scaled != nil)
image = scaled;
}
#else
if (fz_calcimagescale(image, ctm, &dx, &dy))
{
scaled = fz_scalepixmap(image, dx, dy);
image = scaled;
}
#endif
fz_paintimage(mask, bbox, image, ctm, 255);
if (scaled)
fz_droppixmap(scaled);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->scissor = bbox;
dev->dest = dest;
dev->top++;
}
static void
fz_drawpopclip(void *user)
{
fz_drawdevice *dev = user;
fz_pixmap *mask, *dest;
if (dev->top > 0)
{
dev->top--;
dev->scissor = dev->stack[dev->top].scissor;
mask = dev->stack[dev->top].mask;
dest = dev->stack[dev->top].dest;
if (mask && dest)
{
fz_pixmap *scratch = dev->dest;
fz_paintpixmapmask(dest, scratch, mask);
fz_droppixmap(mask);
fz_droppixmap(scratch);
dev->dest = dest;
}
}
}
static void
fz_drawbeginmask(void *user, fz_rect rect, int luminosity, fz_colorspace *colorspace, float *colorfv)
{
fz_drawdevice *dev = user;
fz_pixmap *dest;
fz_bbox bbox;
if (dev->top == STACKSIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
bbox = fz_roundrect(rect);
bbox = fz_intersectbbox(bbox, dev->scissor);
dest = fz_newpixmapwithrect(fz_devicegray, bbox);
if (luminosity)
{
float bc;
if (!colorspace)
colorspace = fz_devicegray;
fz_convertcolor(colorspace, colorfv, fz_devicegray, &bc);
fz_clearpixmapwithcolor(dest, bc * 255);
}
else
fz_clearpixmap(dest);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].luminosity = luminosity;
dev->top++;
dev->scissor = bbox;
dev->dest = dest;
}
static void
fz_drawendmask(void *user)
{
fz_drawdevice *dev = user;
fz_pixmap *mask = dev->dest;
fz_pixmap *temp, *dest;
fz_bbox bbox;
int luminosity;
if (dev->top == STACKSIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
if (dev->top > 0)
{
/* pop soft mask buffer */
dev->top--;
luminosity = dev->stack[dev->top].luminosity;
dev->scissor = dev->stack[dev->top].scissor;
dev->dest = dev->stack[dev->top].dest;
/* convert to alpha mask */
temp = fz_alphafromgray(mask, luminosity);
fz_droppixmap(mask);
/* create new dest scratch buffer */
bbox = fz_boundpixmap(temp);
dest = fz_newpixmapwithrect(dev->dest->colorspace, bbox);
fz_clearpixmap(dest);
/* push soft mask as clip mask */
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = temp;
dev->stack[dev->top].dest = dev->dest;
dev->scissor = bbox;
dev->dest = dest;
dev->top++;
}
}
static void
fz_drawbegingroup(void *user, fz_rect rect, int isolated, int knockout, fz_blendmode blendmode, float alpha)
{
fz_drawdevice *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_bbox bbox;
fz_pixmap *dest;
if (dev->top == STACKSIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
bbox = fz_roundrect(rect);
bbox = fz_intersectbbox(bbox, dev->scissor);
dest = fz_newpixmapwithrect(model, bbox);
fz_clearpixmap(dest);
dev->stack[dev->top].alpha = alpha;
dev->stack[dev->top].blendmode = blendmode;
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].dest = dev->dest;
dev->top++;
dev->scissor = bbox;
dev->dest = dest;
}
static void
fz_drawendgroup(void *user)
{
fz_drawdevice *dev = user;
fz_pixmap *group = dev->dest;
fz_blendmode blendmode;
float alpha;
if (dev->top > 0)
{
dev->top--;
alpha = dev->stack[dev->top].alpha;
blendmode = dev->stack[dev->top].blendmode;
dev->dest = dev->stack[dev->top].dest;
dev->scissor = dev->stack[dev->top].scissor;
if (blendmode == FZ_BNORMAL)
fz_paintpixmap(dev->dest, group, alpha * 255);
else
fz_blendpixmap(dev->dest, group, alpha * 255, blendmode);
fz_droppixmap(group);
}
}
static void
fz_drawfreeuser(void *user)
{
fz_drawdevice *dev = user;
/* TODO: pop and free the stacks */
fz_freegel(dev->gel);
fz_freeael(dev->ael);
fz_free(dev);
}
fz_device *
fz_newdrawdevice(fz_glyphcache *cache, fz_pixmap *dest)
{
fz_device *dev;
fz_drawdevice *ddev = fz_malloc(sizeof(fz_drawdevice));
ddev->cache = cache;
ddev->gel = fz_newgel();
ddev->ael = fz_newael();
ddev->dest = dest;
ddev->top = 0;
ddev->scissor.x0 = dest->x;
ddev->scissor.y0 = dest->y;
ddev->scissor.x1 = dest->x + dest->w;
ddev->scissor.y1 = dest->y + dest->h;
dev = fz_newdevice(ddev);
dev->freeuser = fz_drawfreeuser;
dev->fillpath = fz_drawfillpath;
dev->strokepath = fz_drawstrokepath;
dev->clippath = fz_drawclippath;
dev->clipstrokepath = fz_drawclipstrokepath;
dev->filltext = fz_drawfilltext;
dev->stroketext = fz_drawstroketext;
dev->cliptext = fz_drawcliptext;
dev->clipstroketext = fz_drawclipstroketext;
dev->ignoretext = fz_drawignoretext;
dev->fillimagemask = fz_drawfillimagemask;
dev->clipimagemask = fz_drawclipimagemask;
dev->fillimage = fz_drawfillimage;
dev->fillshade = fz_drawfillshade;
dev->popclip = fz_drawpopclip;
dev->beginmask = fz_drawbeginmask;
dev->endmask = fz_drawendmask;
dev->begingroup = fz_drawbegingroup;
dev->endgroup = fz_drawendgroup;
return dev;
}
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