static void
fz_draw_clip_path(fz_device *devp, fz_path *path, fz_rect rect, int even_odd, fz_matrix ctm)
{
fz_draw_device *dev = devp->user;
float expansion = fz_matrix_expansion(ctm);
float flatness = 0.3f / expansion;
fz_bbox bbox;
fz_draw_state *state = &dev->stack[dev->top];
fz_colorspace *model;
fz_context *ctx = dev->ctx;
fz_reset_gel(dev->gel, state->scissor);
fz_flatten_fill_path(dev->gel, path, ctm, flatness);
fz_sort_gel(dev->gel);
state = push_stack(dev);
model = state->dest->colorspace;
bbox = fz_bound_gel(dev->gel);
bbox = fz_intersect_bbox(bbox, state->scissor);
bbox = fz_intersect_bbox(bbox, fz_bbox_from_rect(rect));
/* SumatraPDF: try to match rendering with and without display list */
if (fz_is_infinite_rect(rect))
bbox = fz_intersect_bbox(bbox, fz_bbox_from_rect(fz_bound_path(ctx, path, NULL, ctm)));
if (fz_is_empty_rect(bbox) || fz_is_rect_gel(dev->gel))
{
state[1].scissor = bbox;
state[1].mask = NULL;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top-1, "Clip (rectangular) begin\n");
#endif
return;
}
fz_try(ctx)
{
state[1].mask = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(dev->ctx, state[1].mask);
state[1].dest = fz_new_pixmap_with_bbox(dev->ctx, model, bbox);
fz_clear_pixmap(dev->ctx, state[1].dest);
if (state[1].shape)
{
state[1].shape = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(dev->ctx, state[1].shape);
}
fz_scan_convert(dev->gel, even_odd, bbox, state[1].mask, NULL);
state[1].blendmode |= FZ_BLEND_ISOLATED;
state[1].scissor = bbox;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top-1, "Clip (non-rectangular) begin\n");
#endif
}
fz_catch(ctx)
{
emergency_pop_stack(dev, state);
}
}
static fz_draw_state *
fz_knockout_begin(fz_draw_device *dev)
{
fz_context *ctx = dev->ctx;
fz_bbox bbox;
fz_pixmap *dest, *shape;
fz_draw_state *state = &dev->stack[dev->top];
int isolated = state->blendmode & FZ_BLEND_ISOLATED;
if ((state->blendmode & FZ_BLEND_KNOCKOUT) == 0)
return state;
state = push_stack(dev);
bbox = fz_pixmap_bbox(dev->ctx, state->dest);
bbox = fz_intersect_bbox(bbox, state->scissor);
dest = fz_new_pixmap_with_bbox(dev->ctx, state->dest->colorspace, bbox);
if (isolated)
{
fz_clear_pixmap(ctx, dest);
}
else
{
/* Find the last but one destination to copy */
int i = dev->top-1; /* i = the one on entry (i.e. the last one) */
fz_pixmap *prev = state->dest;
while (i > 0)
{
prev = dev->stack[--i].dest;
if (prev != state->dest)
break;
}
if (prev)
fz_copy_pixmap_rect(ctx, dest, prev, bbox);
else
fz_clear_pixmap(ctx, dest);
}
if (state->blendmode == 0 && isolated)
{
/* We can render direct to any existing shape plane. If there
* isn't one, we don't need to make one. */
shape = state->shape;
}
else
{
shape = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(dev->ctx, shape);
}
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top-1, "Knockout begin\n");
#endif
state[1].scissor = bbox;
state[1].dest = dest;
state[1].shape = shape;
state[1].blendmode &= ~FZ_BLEND_MODEMASK;
return &state[1];
}
static void
fz_draw_clip_stroke_path(fz_context *ctx, void *user, fz_path *path, fz_rect *rect, fz_stroke_state *stroke, fz_matrix ctm)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
float expansion = fz_matrix_expansion(ctm);
float flatness = 0.3f / expansion;
float linewidth = stroke->linewidth;
fz_pixmap *mask, *dest, *shape;
fz_bbox bbox;
if (dev->top == dev->stack_max)
fz_grow_stack(dev);
if (linewidth * expansion < 0.1f)
linewidth = 1 / expansion;
fz_reset_gel(dev->gel, dev->scissor);
if (stroke->dash_len > 0)
fz_flatten_dash_path(ctx, dev->gel, path, stroke, ctm, flatness, linewidth);
else
fz_flatten_stroke_path(ctx, dev->gel, path, stroke, ctm, flatness, linewidth);
fz_sort_gel(dev->gel);
bbox = fz_bound_gel(dev->gel);
bbox = fz_intersect_bbox(bbox, dev->scissor);
if (rect)
bbox = fz_intersect_bbox(bbox, fz_round_rect(*rect));
mask = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(mask);
dest = fz_new_pixmap_with_rect(ctx, model, bbox);
/* FIXME: See note #1 */
fz_clear_pixmap(dest);
if (dev->shape)
{
shape = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(shape);
}
else
shape = NULL;
if (!fz_is_empty_rect(bbox))
fz_scan_convert(dev->gel, 0, bbox, mask, NULL);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].shape = dev->shape;
/* FIXME: See note #1 */
dev->stack[dev->top].blendmode = dev->blendmode | FZ_BLEND_ISOLATED;
dev->scissor = bbox;
dev->dest = dest;
dev->shape = shape;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Clip (stroke) begin\n");
#endif
dev->top++;
}
static void
fz_draw_clip_stroke_path(fz_device *devp, fz_path *path, fz_rect *rect, fz_stroke_state *stroke, fz_matrix ctm)
{
fz_draw_device *dev = devp->user;
float expansion = fz_matrix_expansion(ctm);
float flatness = 0.3f / expansion;
float linewidth = stroke->linewidth;
fz_bbox bbox;
fz_draw_state *state = &dev->stack[dev->top];
fz_colorspace *model;
fz_context *ctx = dev->ctx;
if (linewidth * expansion < 0.1f)
linewidth = 1 / expansion;
fz_reset_gel(dev->gel, state->scissor);
if (stroke->dash_len > 0)
fz_flatten_dash_path(dev->gel, path, stroke, ctm, flatness, linewidth);
else
fz_flatten_stroke_path(dev->gel, path, stroke, ctm, flatness, linewidth);
fz_sort_gel(dev->gel);
state = push_stack(dev);
model = state->dest->colorspace;
bbox = fz_bound_gel(dev->gel);
bbox = fz_intersect_bbox(bbox, state->scissor);
if (rect)
bbox = fz_intersect_bbox(bbox, fz_bbox_covering_rect(*rect));
/* SumatraPDF: try to match rendering with and without display list */
else
bbox = fz_intersect_bbox(bbox, fz_bbox_covering_rect(fz_bound_path(ctx, path, stroke, ctm)));
fz_try(ctx)
{
state[1].mask = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(dev->ctx, state[1].mask);
state[1].dest = fz_new_pixmap_with_bbox(dev->ctx, model, bbox);
fz_clear_pixmap(dev->ctx, state[1].dest);
if (state->shape)
{
state[1].shape = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(dev->ctx, state[1].shape);
}
if (!fz_is_empty_rect(bbox))
fz_scan_convert(dev->gel, 0, bbox, state[1].mask, NULL);
state[1].blendmode |= FZ_BLEND_ISOLATED;
state[1].scissor = bbox;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top-1, "Clip (stroke) begin\n");
#endif
}
fz_catch(ctx)
{
emergency_pop_stack(dev, state);
}
}
static void fz_knockout_begin(fz_context *ctx, void *user)
{
fz_draw_device *dev = user;
fz_bbox bbox;
fz_pixmap *dest, *shape;
int isolated = dev->blendmode & FZ_BLEND_ISOLATED;
if ((dev->blendmode & FZ_BLEND_KNOCKOUT) == 0)
return;
if (dev->top == dev->stack_max)
fz_grow_stack(dev);
bbox = fz_bound_pixmap(dev->dest);
bbox = fz_intersect_bbox(bbox, dev->scissor);
dest = fz_new_pixmap_with_rect(ctx, dev->dest->colorspace, bbox);
if (isolated)
{
fz_clear_pixmap(dest);
}
else
{
fz_pixmap *prev;
int i = dev->top;
do
prev = dev->stack[--i].dest;
while (prev == NULL);
fz_copy_pixmap_rect(dest, prev, bbox);
}
if (dev->blendmode == 0 && isolated || 1 /* SumatraPDF: disable crashy shape code */)
{
/* We can render direct to any existing shape plane. If there
* isn't one, we don't need to make one. */
shape = dev->shape;
}
else
{
shape = fz_new_pixmap_with_rect(dev->ctx, NULL, bbox);
fz_clear_pixmap(shape);
}
dev->stack[dev->top].blendmode = dev->blendmode;
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].shape = dev->shape;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Knockout begin\n");
#endif
dev->top++;
dev->scissor = bbox;
dev->dest = dest;
dev->shape = shape;
dev->blendmode &= ~FZ_BLEND_MODEMASK;
}
static void
fz_draw_begin_mask(fz_context *ctx, void *user, fz_rect rect, int luminosity, fz_colorspace *colorspace, float *colorfv)
{
fz_draw_device *dev = user;
fz_pixmap *dest;
fz_pixmap *shape = dev->shape;
fz_bbox bbox;
if (dev->top == dev->stack_max)
fz_grow_stack(dev);
bbox = fz_round_rect(rect);
bbox = fz_intersect_bbox(bbox, dev->scissor);
dest = fz_new_pixmap_with_rect(ctx, fz_device_gray, bbox);
if (dev->shape)
{
/* FIXME: If we ever want to support AIS true, then we
* probably want to create a shape pixmap here, using:
* shape = fz_new_pixmap_with_rect(NULL, bbox);
* then, in the end_mask code, we create the mask from this
* rather than dest.
*/
shape = NULL;
}
if (luminosity)
{
float bc;
if (!colorspace)
colorspace = fz_device_gray;
fz_convert_color(ctx, colorspace, colorfv, fz_device_gray, &bc);
fz_clear_pixmap_with_color(dest, bc * 255);
if (shape)
fz_clear_pixmap_with_color(shape, 255);
}
else
{
fz_clear_pixmap(dest);
if (shape)
fz_clear_pixmap(shape);
}
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].luminosity = luminosity;
dev->stack[dev->top].shape = dev->shape;
dev->stack[dev->top].blendmode = dev->blendmode;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Mask begin\n");
#endif
dev->top++;
dev->scissor = bbox;
dev->dest = dest;
dev->shape = shape;
}
static void
fz_draw_begin_tile(fz_device *devp, fz_rect area, fz_rect view, float xstep, float ystep, fz_matrix ctm)
{
fz_draw_device *dev = devp->user;
fz_pixmap *dest = NULL;
fz_pixmap *shape;
fz_bbox bbox;
fz_context *ctx = dev->ctx;
fz_draw_state *state = &dev->stack[dev->top];
fz_colorspace *model = state->dest->colorspace;
/* area, view, xstep, ystep are in pattern space */
/* ctm maps from pattern space to device space */
if (state->blendmode & FZ_BLEND_KNOCKOUT)
fz_knockout_begin(dev);
state = push_stack(dev);
bbox = fz_bbox_covering_rect(fz_transform_rect(ctm, view));
/* We should never have a bbox that entirely covers our destination.
* If we do, then the check for only 1 tile being visible above has
* failed. Actually, this *can* fail due to the round_rect, at extreme
* resolutions, so disable this assert.
* assert(bbox.x0 > state->dest->x || bbox.x1 < state->dest->x + state->dest->w ||
* bbox.y0 > state->dest->y || bbox.y1 < state->dest->y + state->dest->h);
*/
dest = fz_new_pixmap_with_bbox(dev->ctx, model, bbox);
fz_clear_pixmap(ctx, dest);
shape = state[0].shape;
if (shape)
{
fz_var(shape);
fz_try(ctx)
{
shape = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(ctx, shape);
}
fz_catch(ctx)
{
fz_drop_pixmap(ctx, dest);
fz_rethrow(ctx);
}
}
state[1].blendmode |= FZ_BLEND_ISOLATED;
state[1].xstep = xstep;
state[1].ystep = ystep;
state[1].area = area;
state[1].ctm = ctm;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top-1, "Tile begin\n");
#endif
state[1].scissor = bbox;
state[1].dest = dest;
state[1].shape = shape;
}
static void
fz_draw_end_mask(fz_context *ctx, void *user)
{
fz_draw_device *dev = user;
fz_pixmap *mask = dev->dest;
fz_pixmap *maskshape = dev->shape;
fz_pixmap *temp, *dest;
fz_bbox bbox;
int luminosity;
if (dev->top == dev->stack_max)
fz_grow_stack(dev);
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;
dev->shape = dev->stack[dev->top].shape;
/* convert to alpha mask */
temp = fz_alpha_from_gray(ctx, mask, luminosity);
fz_drop_pixmap(ctx, mask);
fz_drop_pixmap(ctx, maskshape);
/* create new dest scratch buffer */
bbox = fz_bound_pixmap(temp);
dest = fz_new_pixmap_with_rect(ctx, dev->dest->colorspace, bbox);
/* FIXME: See note #1 */
fz_clear_pixmap(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;
/* FIXME: See note #1 */
dev->stack[dev->top].blendmode = dev->blendmode | FZ_BLEND_ISOLATED;
/* If we have a shape, then it'll need to be masked with the
* clip mask when we pop. So create a new shape now. */
if (dev->shape)
{
dev->stack[dev->top].shape = dev->shape;
dev->shape = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(dev->shape);
}
dev->scissor = bbox;
dev->dest = dest;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Mask -> Clip\n");
#endif
dev->top++;
}
}
static void
fz_draw_end_mask(fz_device *devp)
{
fz_draw_device *dev = devp->user;
fz_pixmap *temp, *dest;
fz_bbox bbox;
int luminosity;
fz_context *ctx = dev->ctx;
fz_draw_state *state;
if (dev->top == 0)
{
fz_warn(ctx, "Unexpected draw_end_mask");
return;
}
state = &dev->stack[dev->top-1];
/* pop soft mask buffer */
luminosity = state[1].luminosity;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top-1, "Mask -> Clip\n");
#endif
/* convert to alpha mask */
temp = fz_alpha_from_gray(dev->ctx, state[1].dest, luminosity);
if (state[1].dest != state[0].dest)
fz_drop_pixmap(dev->ctx, state[1].dest);
state[1].dest = NULL;
if (state[1].shape != state[0].shape)
fz_drop_pixmap(dev->ctx, state[1].shape);
state[1].shape = NULL;
if (state[1].mask != state[0].mask)
fz_drop_pixmap(dev->ctx, state[1].mask);
state[1].mask = NULL;
/* create new dest scratch buffer */
bbox = fz_pixmap_bbox(ctx, temp);
dest = fz_new_pixmap_with_bbox(dev->ctx, state->dest->colorspace, bbox);
fz_clear_pixmap(dev->ctx, dest);
/* push soft mask as clip mask */
state[1].mask = temp;
state[1].dest = dest;
state[1].blendmode |= FZ_BLEND_ISOLATED;
/* If we have a shape, then it'll need to be masked with the
* clip mask when we pop. So create a new shape now. */
if (state[0].shape)
{
state[1].shape = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(dev->ctx, state[1].shape);
}
state[1].scissor = bbox;
}
static void
fz_draw_clip_path(void *user, fz_path *path, fz_rect *rect, int even_odd, fz_matrix ctm)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
float expansion = fz_matrix_expansion(ctm);
float flatness = 0.3f / expansion;
fz_pixmap *mask, *dest;
fz_bbox bbox;
if (dev->top == STACK_SIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
fz_reset_gel(dev->gel, dev->scissor);
fz_flatten_fill_path(dev->gel, path, ctm, flatness);
fz_sort_gel(dev->gel);
bbox = fz_bound_gel(dev->gel);
bbox = fz_intersect_bbox(bbox, dev->scissor);
if (rect) {
bbox = fz_intersect_bbox(bbox, fz_round_rect(*rect));
}
if (fz_is_empty_rect(bbox) || fz_is_rect_gel(dev->gel))
{
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = NULL;
dev->stack[dev->top].dest = NULL;
dev->scissor = bbox;
dev->top++;
return;
}
mask = fz_new_pixmap_with_rect(NULL, bbox);
dest = fz_new_pixmap_with_rect(model, bbox);
fz_clear_pixmap(mask);
fz_clear_pixmap(dest);
fz_scan_convert(dev->gel, even_odd, bbox, mask, NULL);
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_draw_begin_mask(fz_device *devp, fz_rect rect, int luminosity, fz_colorspace *colorspace, float *colorfv)
{
fz_draw_device *dev = devp->user;
fz_pixmap *dest;
fz_bbox bbox;
fz_draw_state *state = push_stack(dev);
fz_pixmap *shape = state->shape;
bbox = fz_bbox_covering_rect(rect);
bbox = fz_intersect_bbox(bbox, state->scissor);
dest = fz_new_pixmap_with_bbox(dev->ctx, fz_device_gray, bbox);
if (state->shape)
{
/* FIXME: If we ever want to support AIS true, then we
* probably want to create a shape pixmap here, using:
* shape = fz_new_pixmap_with_bbox(NULL, bbox);
* then, in the end_mask code, we create the mask from this
* rather than dest.
*/
shape = NULL;
}
if (luminosity)
{
float bc;
if (!colorspace)
colorspace = fz_device_gray;
fz_convert_color(dev->ctx, fz_device_gray, &bc, colorspace, colorfv);
fz_clear_pixmap_with_value(dev->ctx, dest, bc * 255);
if (shape)
fz_clear_pixmap_with_value(dev->ctx, shape, 255);
}
else
{
fz_clear_pixmap(dev->ctx, dest);
if (shape)
fz_clear_pixmap(dev->ctx, shape);
}
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top-1, "Mask begin\n");
#endif
state[1].scissor = bbox;
state[1].dest = dest;
state[1].shape = shape;
state[1].luminosity = luminosity;
}
static void
fz_draw_clip_stroke_path(void *user, fz_path *path, fz_rect *rect, fz_stroke_state *stroke, fz_matrix ctm)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
float expansion = fz_matrix_expansion(ctm);
float flatness = 0.3f / expansion;
float linewidth = stroke->linewidth;
fz_pixmap *mask, *dest;
fz_bbox bbox;
if (dev->top == STACK_SIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
if (linewidth * expansion < 0.1f)
linewidth = 1 / expansion;
fz_reset_gel(dev->gel, dev->scissor);
if (stroke->dash_len > 0)
fz_flatten_dash_path(dev->gel, path, stroke, ctm, flatness, linewidth);
else
fz_flatten_stroke_path(dev->gel, path, stroke, ctm, flatness, linewidth);
fz_sort_gel(dev->gel);
bbox = fz_bound_gel(dev->gel);
bbox = fz_intersect_bbox(bbox, dev->scissor);
if (rect)
bbox = fz_intersect_bbox(bbox, fz_round_rect(*rect));
mask = fz_new_pixmap_with_rect(NULL, bbox);
dest = fz_new_pixmap_with_rect(model, bbox);
fz_clear_pixmap(mask);
fz_clear_pixmap(dest);
if (!fz_is_empty_rect(bbox))
fz_scan_convert(dev->gel, 0, bbox, mask, NULL);
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_draw_begin_tile(void *user, fz_rect area, fz_rect view, float xstep, float ystep, fz_matrix ctm)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_pixmap *dest;
fz_bbox bbox;
/* area, view, xstep, ystep are in pattern space */
/* ctm maps from pattern space to device space */
if (dev->top == STACK_SIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
bbox = fz_round_rect(fz_transform_rect(ctm, view));
dest = fz_new_pixmap_with_rect(model, bbox);
fz_clear_pixmap(dest);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].xstep = xstep;
dev->stack[dev->top].ystep = ystep;
dev->stack[dev->top].area = area;
dev->stack[dev->top].ctm = ctm;
dev->top++;
dev->scissor = bbox;
dev->dest = dest;
}
static void
fz_draw_begin_group(void *user, fz_rect rect, int isolated, int knockout, int blendmode, float alpha)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_bbox bbox;
fz_pixmap *dest;
if (dev->top == STACK_SIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
bbox = fz_round_rect(rect);
bbox = fz_intersect_bbox(bbox, dev->scissor);
dest = fz_new_pixmap_with_rect(model, bbox);
fz_clear_pixmap(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;
}
fz_pixmap *
fz_new_pixmap_from_display_list(fz_context *ctx, fz_display_list *list, const fz_matrix *ctm, fz_colorspace *cs, int background)
{
fz_rect rect;
fz_irect irect;
fz_pixmap *pix;
fz_device *dev;
fz_bound_display_list(ctx, list, &rect);
fz_transform_rect(&rect, ctm);
fz_round_rect(&irect, &rect);
pix = fz_new_pixmap_with_bbox(ctx, cs, &irect);
if (background)
fz_clear_pixmap_with_value(ctx, pix, 0xFF);
else
fz_clear_pixmap(ctx, pix);
fz_try(ctx)
{
dev = fz_new_draw_device(ctx, pix);
fz_run_display_list(ctx, list, dev, ctm, NULL, NULL);
}
fz_always(ctx)
{
fz_drop_device(ctx, dev);
}
fz_catch(ctx)
{
fz_drop_pixmap(ctx, pix);
fz_rethrow(ctx);
}
return pix;
}
fz_pixmap *
fz_new_pixmap_from_annot(fz_context *ctx, fz_page *page, fz_annot *annot, const fz_matrix *ctm, fz_colorspace *cs)
{
fz_rect rect;
fz_irect irect;
fz_pixmap *pix;
fz_device *dev;
fz_bound_annot(ctx, page, annot, &rect);
fz_transform_rect(&rect, ctm);
fz_round_rect(&irect, &rect);
pix = fz_new_pixmap_with_bbox(ctx, cs, &irect);
fz_clear_pixmap(ctx, pix);
fz_try(ctx)
{
dev = fz_new_draw_device(ctx, pix);
fz_run_annot(ctx, page, annot, dev, ctm, NULL);
}
fz_always(ctx)
{
fz_drop_device(ctx, dev);
}
fz_catch(ctx)
{
fz_drop_pixmap(ctx, pix);
fz_rethrow(ctx);
}
return pix;
}
fz_pixmap *
fz_new_pixmap_from_page_contents(fz_context *ctx, fz_page *page, const fz_matrix *ctm, fz_colorspace *cs, int alpha)
{
fz_rect rect;
fz_irect irect;
fz_pixmap *pix;
fz_device *dev;
fz_bound_page(ctx, page, &rect);
fz_transform_rect(&rect, ctm);
fz_round_rect(&irect, &rect);
pix = fz_new_pixmap_with_bbox(ctx, cs, &irect, alpha);
if (alpha)
fz_clear_pixmap(ctx, pix);
else
fz_clear_pixmap_with_value(ctx, pix, 0xFF);
fz_try(ctx)
{
dev = fz_new_draw_device(ctx, ctm, pix);
fz_run_page_contents(ctx, page, dev, &fz_identity, NULL);
}
fz_always(ctx)
{
fz_drop_device(ctx, dev);
}
fz_catch(ctx)
{
fz_drop_pixmap(ctx, pix);
fz_rethrow(ctx);
}
return pix;
}
static void
fz_draw_clip_path(fz_device *devp, fz_path *path, fz_rect *rect, int even_odd, fz_matrix ctm)
{
fz_draw_device *dev = devp->user;
float expansion = fz_matrix_expansion(ctm);
float flatness = 0.3f / expansion;
fz_bbox bbox;
fz_draw_state *state = push_stack(dev);
fz_colorspace *model = state->dest->colorspace;
fz_reset_gel(dev->gel, state->scissor);
fz_flatten_fill_path(dev->gel, path, ctm, flatness);
fz_sort_gel(dev->gel);
bbox = fz_bound_gel(dev->gel);
bbox = fz_intersect_bbox(bbox, state->scissor);
if (rect)
bbox = fz_intersect_bbox(bbox, fz_bbox_covering_rect(*rect));
if (fz_is_empty_rect(bbox) || fz_is_rect_gel(dev->gel))
{
state[1].scissor = bbox;
state[1].mask = NULL;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top-1, "Clip (rectangular) begin\n");
#endif
return;
}
state[1].mask = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(dev->ctx, state[1].mask);
state[1].dest = fz_new_pixmap_with_bbox(dev->ctx, model, bbox);
fz_clear_pixmap(dev->ctx, state[1].dest);
if (state[1].shape)
{
state[1].shape = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(dev->ctx, state[1].shape);
}
fz_scan_convert(dev->gel, even_odd, bbox, state[1].mask, NULL);
state[1].blendmode |= FZ_BLEND_ISOLATED;
state[1].scissor = bbox;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top-1, "Clip (non-rectangular) begin\n");
#endif
}
static void
fz_draw_begin_tile(fz_context *ctx, void *user, fz_rect area, fz_rect view, float xstep, float ystep, fz_matrix ctm)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_pixmap *dest;
fz_bbox bbox;
/* area, view, xstep, ystep are in pattern space */
/* ctm maps from pattern space to device space */
if (dev->top == dev->stack_max)
fz_grow_stack(dev);
if (dev->blendmode & FZ_BLEND_KNOCKOUT)
fz_knockout_begin(ctx, dev);
bbox = fz_round_rect(fz_transform_rect(ctm, view));
/* We should never have a bbox that entirely covers our destination.
* If we do, then the check for only 1 tile being visible above has
* failed. */
/* SumatraPDF: assertion intentionally disabled
assert(bbox.x0 > dev->dest->x || bbox.x1 < dev->dest->x + dev->dest->w ||
bbox.y0 > dev->dest->y || bbox.y1 < dev->dest->y + dev->dest->h);
/* cf. http://bugs.ghostscript.com/show_bug.cgi?id=692418 */
dest = fz_new_pixmap_with_limit(ctx, model, bbox.x1 - bbox.x0, bbox.y1 - bbox.y0);
if (dest)
{
dest->x = bbox.x0;
dest->y = bbox.y0;
}
else
{
bbox.x1 = bbox.x0;
bbox.y1 = bbox.y0;
dest = fz_new_pixmap_with_rect(ctx, model, bbox);
}
/* FIXME: See note #1 */
fz_clear_pixmap(dest);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].shape = dev->shape;
/* FIXME: See note #1 */
dev->stack[dev->top].blendmode = dev->blendmode | FZ_BLEND_ISOLATED;
dev->stack[dev->top].xstep = xstep;
dev->stack[dev->top].ystep = ystep;
dev->stack[dev->top].area = area;
dev->stack[dev->top].ctm = ctm;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Tile begin\n");
#endif
dev->top++;
dev->scissor = bbox;
dev->dest = dest;
}
void
fz_paint_shade(fz_shade *shade, fz_matrix ctm, fz_pixmap *dest, fz_bbox bbox)
{
unsigned char clut[256][FZ_MAX_COLORS];
fz_pixmap *temp, *conv;
float color[FZ_MAX_COLORS];
int i, k;
ctm = fz_concat(shade->matrix, ctm);
if (shade->use_function)
{
for (i = 0; i < 256; i++)
{
fz_convert_color(shade->colorspace, shade->function[i], dest->colorspace, color);
for (k = 0; k < dest->colorspace->n; k++)
clut[i][k] = color[k] * 255;
clut[i][k] = shade->function[i][shade->colorspace->n] * 255;
}
conv = fz_new_pixmap_with_rect(dest->colorspace, bbox);
temp = fz_new_pixmap_with_rect(fz_device_gray, bbox);
fz_clear_pixmap(temp);
}
else
{
temp = dest;
}
switch (shade->type)
{
case FZ_LINEAR: fz_paint_linear(shade, ctm, temp, bbox); break;
case FZ_RADIAL: fz_paint_radial(shade, ctm, temp, bbox); break;
case FZ_MESH: fz_paint_mesh(shade, ctm, temp, bbox); break;
}
if (shade->use_function)
{
unsigned char *s = temp->samples;
unsigned char *d = conv->samples;
int len = temp->w * temp->h;
while (len--)
{
int v = *s++;
int a = fz_mul255(*s++, clut[v][conv->n - 1]);
for (k = 0; k < conv->n - 1; k++)
*d++ = fz_mul255(clut[v][k], a);
*d++ = a;
}
fz_paint_pixmap(dest, conv, 255);
fz_drop_pixmap(conv);
fz_drop_pixmap(temp);
}
}
QImage Document::RenderPage (int num, double xRes, double yRes)
{
auto page = WrapPage (pdf_load_page (MuDoc_, num), MuDoc_);
if (!page)
return QImage ();
#if MUPDF_VERSION < 0x0102
const auto& rect = pdf_bound_page (MuDoc_, page.get ());
#else
fz_rect rect;
pdf_bound_page (MuDoc_, page.get (), &rect);
#endif
auto px = fz_new_pixmap (MuCtx_, fz_device_bgr, xRes * (rect.x1 - rect.x0), yRes * (rect.y1 - rect.y0));
fz_clear_pixmap (MuCtx_, px);
auto dev = fz_new_draw_device (MuCtx_, px);
#if MUPDF_VERSION < 0x0102
pdf_run_page (MuDoc_, page.get (), dev, fz_scale (xRes, yRes), NULL);
#else
fz_matrix matrix;
pdf_run_page (MuDoc_, page.get (), dev, fz_scale (&matrix, xRes, yRes), NULL);
#endif
fz_free_device (dev);
const int pxWidth = fz_pixmap_width (MuCtx_, px);
const int pxHeight = fz_pixmap_height (MuCtx_, px);
auto samples = fz_pixmap_samples (MuCtx_, px);
QImage temp (samples, pxWidth, pxHeight, QImage::Format_ARGB32);
QImage img (QSize (pxWidth, pxHeight), QImage::Format_ARGB32);
for (int y = 0; y < pxHeight; ++y)
{
auto target = reinterpret_cast<QRgb*> (img.scanLine (y));
const auto source = reinterpret_cast<QRgb*> (temp.scanLine (y));
std::memcpy (target, source, sizeof (source [0]) * pxWidth);
}
fz_drop_pixmap (MuCtx_, px);
temp = QImage (QSize (pxWidth, pxHeight), QImage::Format_ARGB32);
QPainter p;
p.begin (&temp);
p.fillRect (QRect (QPoint (0, 0), temp.size ()), Qt::white);
p.drawImage (0, 0, img);
p.end ();
return temp;
}
static void
svg_dev_fill_shade(fz_context *ctx, fz_device *dev, fz_shade *shade, const fz_matrix *ctm, float alpha)
{
svg_device *sdev = (svg_device*)dev;
fz_output *out = sdev->out;
fz_rect rect;
fz_irect bbox;
fz_pixmap *pix;
fz_buffer *buf = NULL;
fz_var(buf);
if (dev->container_len == 0)
return;
fz_round_rect(&bbox, fz_intersect_rect(fz_bound_shade(ctx, shade, ctm, &rect), &dev->container[dev->container_len-1].scissor));
if (fz_is_empty_irect(&bbox))
return;
pix = fz_new_pixmap_with_bbox(ctx, fz_device_rgb(ctx), &bbox);
fz_clear_pixmap(ctx, pix);
fz_try(ctx)
{
fz_paint_shade(ctx, shade, ctm, pix, &bbox);
buf = fz_new_buffer_from_pixmap_as_png(ctx, pix);
if (alpha != 1.0f)
fz_printf(ctx, out, "<g opacity=\"%g\">", alpha);
fz_printf(ctx, out, "<image x=\"%dpx\" y=\"%dpx\" width=\"%dpx\" height=\"%dpx\" xlink:href=\"data:image/png;base64,", pix->x, pix->y, pix->w, pix->h);
send_data_base64(ctx, out, buf);
fz_printf(ctx, out, "\"/>\n");
if (alpha != 1.0f)
fz_printf(ctx, out, "</g>");
}
fz_always(ctx)
{
fz_drop_buffer(ctx, buf);
fz_drop_pixmap(ctx, pix);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
static void
fz_draw_end_mask(void *user)
{
fz_draw_device *dev = user;
fz_pixmap *mask = dev->dest;
fz_pixmap *temp, *dest;
fz_bbox bbox;
int luminosity;
if (dev->top == STACK_SIZE)
{
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_alpha_from_gray(mask, luminosity);
fz_drop_pixmap(mask);
/* create new dest scratch buffer */
bbox = fz_bound_pixmap(temp);
dest = fz_new_pixmap_with_rect(dev->dest->colorspace, bbox);
fz_clear_pixmap(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_draw_begin_mask(void *user, fz_rect rect, int luminosity, fz_colorspace *colorspace, float *colorfv)
{
fz_draw_device *dev = user;
fz_pixmap *dest;
fz_bbox bbox;
if (dev->top == STACK_SIZE)
{
fz_warn("assert: too many buffers on stack");
return;
}
bbox = fz_round_rect(rect);
bbox = fz_intersect_bbox(bbox, dev->scissor);
dest = fz_new_pixmap_with_rect(fz_device_gray, bbox);
if (luminosity)
{
float bc;
if (!colorspace)
colorspace = fz_device_gray;
fz_convert_color(colorspace, colorfv, fz_device_gray, &bc);
fz_clear_pixmap_with_color(dest, bc * 255);
}
else
fz_clear_pixmap(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_draw_fill_shade(fz_context *ctx, void *user, fz_shade *shade, fz_matrix ctm, float alpha)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_pixmap *dest = dev->dest;
fz_rect bounds;
fz_bbox bbox, scissor;
float colorfv[FZ_MAX_COLORS];
unsigned char colorbv[FZ_MAX_COLORS + 1];
bounds = fz_bound_shade(shade, ctm);
bbox = fz_intersect_bbox(fz_round_rect(bounds), dev->scissor);
scissor = dev->scissor;
// TODO: proper clip by shade->bbox
if (fz_is_empty_rect(bbox))
return;
if (!model)
{
fz_warn(ctx, "cannot render shading directly to an alpha mask");
return;
}
if (alpha < 1)
{
dest = fz_new_pixmap_with_rect(ctx, dev->dest->colorspace, bbox);
fz_clear_pixmap(dest);
}
if (dev->blendmode & FZ_BLEND_KNOCKOUT)
fz_knockout_begin(ctx, dev);
if (shade->use_background)
{
unsigned char *s;
int x, y, n, i;
fz_convert_color(ctx, 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];
}
}
if (dev->shape)
{
for (y = scissor.y0; y < scissor.y1; y++)
{
s = dev->shape->samples + (scissor.x0 - dev->shape->x) + (y - dev->shape->y) * dev->shape->w;
for (x = scissor.x0; x < scissor.x1; x++)
{
*s++ = 255;
}
}
}
}
fz_paint_shade(ctx, shade, ctm, dest, bbox);
if (dev->shape)
fz_clear_pixmap_rect_with_color(dev->shape, 255, bbox);
if (alpha < 1)
{
fz_paint_pixmap(dev->dest, dest, alpha * 255);
fz_drop_pixmap(ctx, dest);
}
if (dev->blendmode & FZ_BLEND_KNOCKOUT)
fz_knockout_end(ctx, dev);
}
static void
fz_draw_clip_stroke_text(fz_context *ctx, void *user, fz_text *text, fz_stroke_state *stroke, fz_matrix ctm)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_bbox bbox;
fz_pixmap *mask, *dest, *shape;
fz_matrix tm, trm;
fz_pixmap *glyph;
int i, x, y, gid;
if (dev->top == dev->stack_max)
fz_grow_stack(dev);
/* make the mask the exact size needed */
bbox = fz_round_rect(fz_bound_text(text, ctm));
bbox = fz_intersect_bbox(bbox, dev->scissor);
mask = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(mask);
dest = fz_new_pixmap_with_rect(ctx, model, bbox);
/* FIXME: See note #1 */
fz_clear_pixmap(dest);
if (dev->shape)
{
shape = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(shape);
}
else
shape = dev->shape;
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].shape = dev->shape;
/* FIXME: See note #1 */
dev->stack[dev->top].blendmode = dev->blendmode | FZ_BLEND_ISOLATED;
dev->scissor = bbox;
dev->dest = dest;
dev->shape = shape;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Clip (stroke text) begin\n");
#endif
dev->top++;
if (!fz_is_empty_rect(bbox))
{
tm = text->trm;
for (i = 0; i < text->len; i++)
{
gid = text->items[i].gid;
if (gid < 0)
continue;
tm.e = text->items[i].x;
tm.f = text->items[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_render_stroked_glyph(ctx, dev->cache, text->font, gid, trm, ctm, stroke);
if (glyph)
{
draw_glyph(NULL, mask, glyph, x, y, bbox);
if (dev->shape)
draw_glyph(NULL, dev->shape, glyph, x, y, bbox);
fz_drop_pixmap(ctx, glyph);
}
}
}
}
static void
fz_draw_clip_text(fz_context *ctx, void *user, fz_text *text, fz_matrix ctm, int accumulate)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_bbox bbox;
fz_pixmap *mask, *dest, *shape;
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 == dev->stack_max)
fz_grow_stack(dev);
if (accumulate == 0)
{
/* make the mask the exact size needed */
bbox = fz_round_rect(fz_bound_text(text, ctm));
bbox = fz_intersect_bbox(bbox, dev->scissor);
}
else
{
/* be conservative about the size of the mask needed */
bbox = dev->scissor;
}
if (accumulate == 0 || accumulate == 1)
{
mask = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(mask);
dest = fz_new_pixmap_with_rect(ctx, model, bbox);
/* FIXME: See note #1 */
fz_clear_pixmap(dest);
if (dev->shape)
{
shape = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(shape);
}
else
shape = NULL;
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].shape = dev->shape;
/* FIXME: See note #1 */
dev->stack[dev->top].blendmode = dev->blendmode | FZ_BLEND_ISOLATED;
dev->scissor = bbox;
dev->dest = dest;
dev->shape = shape;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Clip (text) begin\n");
#endif
dev->top++;
}
else
{
mask = dev->stack[dev->top-1].mask;
}
if (!fz_is_empty_rect(bbox))
{
tm = text->trm;
for (i = 0; i < text->len; i++)
{
gid = text->items[i].gid;
if (gid < 0)
continue;
tm.e = text->items[i].x;
tm.f = text->items[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_render_glyph(ctx, dev->cache, text->font, gid, trm, model);
if (glyph)
{
draw_glyph(NULL, mask, glyph, x, y, bbox);
if (dev->shape)
draw_glyph(NULL, dev->shape, glyph, x, y, bbox);
fz_drop_pixmap(ctx, glyph);
}
}
}
}
static void
fz_draw_clip_path(fz_context *ctx, void *user, fz_path *path, fz_rect *rect, int even_odd, fz_matrix ctm)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
float expansion = fz_matrix_expansion(ctm);
float flatness = 0.3f / expansion;
fz_pixmap *mask, *dest, *shape;
fz_bbox bbox;
if (dev->top == dev->stack_max)
fz_grow_stack(dev);
fz_reset_gel(dev->gel, dev->scissor);
fz_flatten_fill_path(ctx, dev->gel, path, ctm, flatness);
fz_sort_gel(dev->gel);
bbox = fz_bound_gel(dev->gel);
bbox = fz_intersect_bbox(bbox, dev->scissor);
if (rect)
bbox = fz_intersect_bbox(bbox, fz_round_rect(*rect));
if (fz_is_empty_rect(bbox) || fz_is_rect_gel(dev->gel))
{
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = NULL;
dev->stack[dev->top].dest = NULL;
dev->stack[dev->top].shape = dev->shape;
dev->stack[dev->top].blendmode = dev->blendmode;
dev->scissor = bbox;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Clip (rectangular) begin\n");
#endif
dev->top++;
return;
}
mask = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(mask);
dest = fz_new_pixmap_with_rect(ctx, model, bbox);
/* FIXME: See note #1 */
fz_clear_pixmap(dest);
if (dev->shape)
{
shape = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(shape);
}
else
shape = NULL;
fz_scan_convert(dev->gel, even_odd, bbox, mask, NULL);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].shape = dev->shape;
/* FIXME: See note #1 */
dev->stack[dev->top].blendmode = dev->blendmode | FZ_BLEND_ISOLATED;
dev->scissor = bbox;
dev->dest = dest;
dev->shape = shape;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Clip (non-rectangular) begin\n");
#endif
dev->top++;
}
static void
fz_draw_begin_group(fz_context *ctx, void *user, fz_rect rect, int isolated, int knockout, int blendmode, float alpha)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_bbox bbox;
fz_pixmap *dest, *shape;
if (dev->top == dev->stack_max)
{
fz_warn(ctx, "assert: too many buffers on stack");
return;
}
if (dev->blendmode & FZ_BLEND_KNOCKOUT)
fz_knockout_begin(ctx, dev);
bbox = fz_round_rect(rect);
bbox = fz_intersect_bbox(bbox, dev->scissor);
dest = fz_new_pixmap_with_rect(ctx, model, bbox);
#ifndef ATTEMPT_KNOCKOUT_AND_ISOLATED
knockout = 0;
isolated = 1;
#endif
if (isolated)
{
fz_clear_pixmap(dest);
}
else
{
fz_copy_pixmap_rect(dest, dev->dest, bbox);
}
if (blendmode == 0 && alpha == 1.0 && isolated || 1 /* SumatraPDF: disable crashy shape code */)
{
/* We can render direct to any existing shape plane. If there
* isn't one, we don't need to make one. */
shape = dev->shape;
}
else
{
shape = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(shape);
}
dev->stack[dev->top].alpha = alpha;
dev->stack[dev->top].blendmode = dev->blendmode;
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].shape = dev->shape;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Group Begin\n");
#endif
dev->top++;
dev->scissor = bbox;
dev->dest = dest;
dev->shape = shape;
dev->blendmode = blendmode | (isolated ? FZ_BLEND_ISOLATED : 0) | (knockout ? FZ_BLEND_KNOCKOUT : 0);
}
static void
fz_draw_clip_image_mask(fz_context *ctx, void *user, fz_pixmap *image, fz_rect *rect, fz_matrix ctm)
{
fz_draw_device *dev = user;
fz_colorspace *model = dev->dest->colorspace;
fz_bbox bbox;
fz_pixmap *mask, *dest, *shape;
fz_pixmap *scaled = NULL;
int dx, dy;
if (dev->top == dev->stack_max)
fz_grow_stack(dev);
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "Clip (image mask) begin\n");
#endif
if (image->w == 0 || image->h == 0)
{
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = NULL;
dev->stack[dev->top].dest = NULL;
dev->stack[dev->top].blendmode = dev->blendmode;
dev->scissor = fz_empty_bbox;
dev->top++;
return;
}
bbox = fz_round_rect(fz_transform_rect(ctm, fz_unit_rect));
bbox = fz_intersect_bbox(bbox, dev->scissor);
if (rect)
bbox = fz_intersect_bbox(bbox, fz_round_rect(*rect));
mask = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(mask);
dest = fz_new_pixmap_with_rect(ctx, model, bbox);
/* FIXME: See note #1 */
fz_clear_pixmap(dest);
if (dev->shape)
{
shape = fz_new_pixmap_with_rect(ctx, NULL, bbox);
fz_clear_pixmap(shape);
}
else
shape = NULL;
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)
{
int gridfit = !(dev->flags & FZ_DRAWDEV_FLAGS_TYPE3);
scaled = fz_transform_pixmap(ctx, image, &ctm, dev->dest->x, dev->dest->y, dx, dy, gridfit);
if (scaled == NULL)
{
if (dx < 1)
dx = 1;
if (dy < 1)
dy = 1;
scaled = fz_scale_pixmap(ctx, image, image->x, image->y, dx, dy);
}
if (scaled != NULL)
image = scaled;
}
fz_paint_image(mask, bbox, dev->shape, image, ctm, 255);
if (scaled)
fz_drop_pixmap(ctx, scaled);
dev->stack[dev->top].scissor = dev->scissor;
dev->stack[dev->top].mask = mask;
dev->stack[dev->top].dest = dev->dest;
dev->stack[dev->top].shape = dev->shape;
/* FIXME: See note #1 */
dev->stack[dev->top].blendmode = dev->blendmode | FZ_BLEND_ISOLATED;
dev->scissor = bbox;
dev->dest = dest;
dev->shape = shape;
dev->top++;
}
