static void fz_knockout_end(fz_context *ctx, void *user)
{
fz_draw_device *dev = user;
fz_pixmap *group = dev->dest;
fz_pixmap *shape = dev->shape;
int blendmode;
int isolated;
if ((dev->blendmode & FZ_BLEND_KNOCKOUT) == 0)
return;
if (dev->top == dev->stack_max)
fz_grow_stack(dev);
if (dev->top > 0)
{
dev->top--;
blendmode = dev->blendmode & FZ_BLEND_MODEMASK;
isolated = dev->blendmode & FZ_BLEND_ISOLATED;
dev->blendmode = dev->stack[dev->top].blendmode;
dev->shape = dev->stack[dev->top].shape;
dev->dest = dev->stack[dev->top].dest;
dev->scissor = dev->stack[dev->top].scissor;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "");
fz_dump_blend(group, "Blending ");
if (shape)
fz_dump_blend(shape, "/");
fz_dump_blend(dev->dest, " onto ");
if (dev->shape)
fz_dump_blend(dev->shape, "/");
if (blendmode != 0)
printf(" (blend %d)", blendmode);
if (isolated != 0)
printf(" (isolated)");
printf(" (knockout)");
#endif
if ((blendmode == 0) && (shape == NULL))
fz_paint_pixmap(dev->dest, group, 255);
else
fz_blend_pixmap(dev->dest, group, 255, blendmode, isolated, shape);
fz_drop_pixmap(ctx, group);
if (shape != dev->shape)
{
if (dev->shape)
{
fz_paint_pixmap(dev->shape, shape, 255);
}
fz_drop_pixmap(ctx, shape);
}
#ifdef DUMP_GROUP_BLENDS
fz_dump_blend(dev->dest, " to get ");
if (dev->shape)
fz_dump_blend(dev->shape, "/");
printf("\n");
#endif
}
}
static void
fz_draw_end_group(fz_device *devp)
{
fz_draw_device *dev = devp->user;
int blendmode;
int isolated;
float alpha;
fz_context *ctx = dev->ctx;
fz_draw_state *state;
if (dev->top == 0)
{
fz_warn(ctx, "Unexpected end_group");
return;
}
state = &dev->stack[--dev->top];
alpha = state[1].alpha;
blendmode = state[1].blendmode & FZ_BLEND_MODEMASK;
isolated = state[1].blendmode & FZ_BLEND_ISOLATED;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "");
fz_dump_blend(dev->ctx, state[1].dest, "Group end: blending ");
if (state[1].shape)
fz_dump_blend(dev->ctx, state[1].shape, "/");
fz_dump_blend(dev->ctx, state[0].dest, " onto ");
if (state[0].shape)
fz_dump_blend(dev->ctx, state[0].shape, "/");
if (alpha != 1.0f)
printf(" (alpha %g)", alpha);
if (blendmode != 0)
printf(" (blend %d)", blendmode);
if (isolated != 0)
printf(" (isolated)");
if (state[1].blendmode & FZ_BLEND_KNOCKOUT)
printf(" (knockout)");
#endif
if ((blendmode == 0) && (state[0].shape == state[1].shape))
fz_paint_pixmap(state[0].dest, state[1].dest, alpha * 255);
else
fz_blend_pixmap(state[0].dest, state[1].dest, alpha * 255, blendmode, isolated, state[1].shape);
fz_drop_pixmap(dev->ctx, state[1].dest);
if (state[0].shape != state[1].shape)
{
if (state[0].shape)
fz_paint_pixmap(state[0].shape, state[1].shape, alpha * 255);
fz_drop_pixmap(dev->ctx, state[1].shape);
}
#ifdef DUMP_GROUP_BLENDS
fz_dump_blend(dev->ctx, state[0].dest, " to get ");
if (state[0].shape)
fz_dump_blend(dev->ctx, state[0].shape, "/");
printf("\n");
#endif
if (state[0].blendmode & FZ_BLEND_KNOCKOUT)
fz_knockout_end(dev);
}
static void fz_knockout_end(fz_draw_device *dev)
{
fz_draw_state *state;
int blendmode;
int isolated;
fz_context *ctx = dev->ctx;
if (dev->top == 0)
{
fz_warn(ctx, "unexpected knockout end");
return;
}
state = &dev->stack[--dev->top];
if ((state[0].blendmode & FZ_BLEND_KNOCKOUT) == 0)
return;
blendmode = state->blendmode & FZ_BLEND_MODEMASK;
isolated = state->blendmode & FZ_BLEND_ISOLATED;
#ifdef DUMP_GROUP_BLENDS
dump_spaces(dev->top, "");
fz_dump_blend(dev->ctx, state[1].dest, "Knockout end: blending ");
if (state[1].shape)
fz_dump_blend(dev->ctx, state[1].shape, "/");
fz_dump_blend(dev->ctx, state[0].dest, " onto ");
if (state[0].shape)
fz_dump_blend(dev->ctx, state[0].shape, "/");
if (blendmode != 0)
printf(" (blend %d)", blendmode);
if (isolated != 0)
printf(" (isolated)");
printf(" (knockout)");
#endif
if ((blendmode == 0) && (state[0].shape == state[1].shape))
fz_paint_pixmap(state[0].dest, state[1].dest, 255);
else
fz_blend_pixmap(state[0].dest, state[1].dest, 255, blendmode, isolated, state[1].shape);
fz_drop_pixmap(dev->ctx, state[1].dest);
if (state[0].shape != state[1].shape)
{
if (state[0].shape)
fz_paint_pixmap(state[0].shape, state[1].shape, 255);
fz_drop_pixmap(dev->ctx, state[1].shape);
}
#ifdef DUMP_GROUP_BLENDS
fz_dump_blend(dev->ctx, state[0].dest, " to get ");
if (state[0].shape)
fz_dump_blend(dev->ctx, state[0].shape, "/");
printf("\n");
#endif
}
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);
}
}
static void
fz_draw_end_group(void *user)
{
fz_draw_device *dev = user;
fz_pixmap *group = dev->dest;
int 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 == 0)
fz_paint_pixmap(dev->dest, group, alpha * 255);
else
fz_blend_pixmap(dev->dest, group, alpha * 255, blendmode);
fz_drop_pixmap(group);
}
}
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);
}
void
fz_paint_shade(fz_context *ctx, fz_shade *shade, const fz_matrix *ctm, fz_pixmap *dest, const fz_irect *bbox)
{
unsigned char clut[256][FZ_MAX_COLORS];
fz_pixmap *temp = NULL;
fz_pixmap *conv = NULL;
float color[FZ_MAX_COLORS];
struct paint_tri_data ptd;
int i, k;
fz_matrix local_ctm;
fz_var(temp);
fz_var(conv);
fz_try(ctx)
{
fz_concat(&local_ctm, &shade->matrix, ctm);
if (shade->use_function)
{
fz_color_converter cc;
fz_find_color_converter(&cc, ctx, dest->colorspace, shade->colorspace);
for (i = 0; i < 256; i++)
{
cc.convert(&cc, color, shade->function[i]);
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_bbox(ctx, dest->colorspace, bbox);
temp = fz_new_pixmap_with_bbox(ctx, fz_device_gray, bbox);
fz_clear_pixmap(ctx, temp);
}
else
{
temp = dest;
}
ptd.ctx = ctx;
ptd.dest = temp;
ptd.shade = shade;
ptd.bbox = bbox;
fz_process_mesh(ctx, shade, &local_ctm, &do_paint_tri, &ptd);
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(ctx, conv);
fz_drop_pixmap(ctx, temp);
}
}
fz_catch(ctx)
{
fz_drop_pixmap(ctx, conv);
fz_drop_pixmap(ctx, temp);
fz_rethrow(ctx);
}
}
static void
fz_draw_fill_shade(fz_device *devp, fz_shade *shade, fz_matrix ctm, float alpha)
{
fz_draw_device *dev = devp->user;
fz_rect bounds;
fz_bbox bbox, scissor;
fz_pixmap *dest, *shape;
float colorfv[FZ_MAX_COLORS];
unsigned char colorbv[FZ_MAX_COLORS + 1];
fz_draw_state *state = &dev->stack[dev->top];
fz_colorspace *model = state->dest->colorspace;
bounds = fz_bound_shade(dev->ctx, shade, ctm);
scissor = state->scissor;
bbox = fz_intersect_bbox(fz_bbox_covering_rect(bounds), scissor);
if (fz_is_empty_rect(bbox))
return;
if (!model)
{
fz_warn(dev->ctx, "cannot render shading directly to an alpha mask");
return;
}
if (state->blendmode & FZ_BLEND_KNOCKOUT)
state = fz_knockout_begin(dev);
dest = state->dest;
shape = state->shape;
if (alpha < 1)
{
dest = fz_new_pixmap_with_bbox(dev->ctx, state->dest->colorspace, bbox);
fz_clear_pixmap(dev->ctx, dest);
if (shape)
{
shape = fz_new_pixmap_with_bbox(dev->ctx, NULL, bbox);
fz_clear_pixmap(dev->ctx, shape);
}
}
if (shade->use_background)
{
unsigned char *s;
int x, y, n, i;
fz_convert_color(dev->ctx, model, colorfv, shade->colorspace, shade->background);
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 + (unsigned int)(((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 (shape)
{
for (y = scissor.y0; y < scissor.y1; y++)
{
s = shape->samples + (unsigned int)((scissor.x0 - shape->x) + (y - shape->y) * shape->w);
for (x = scissor.x0; x < scissor.x1; x++)
{
*s++ = 255;
}
}
}
}
fz_paint_shade(dev->ctx, shade, ctm, dest, bbox);
if (shape)
fz_clear_pixmap_rect_with_value(dev->ctx, shape, 255, bbox);
if (alpha < 1)
{
fz_paint_pixmap(state->dest, dest, alpha * 255);
fz_drop_pixmap(dev->ctx, dest);
if (shape)
{
fz_paint_pixmap(state->shape, shape, alpha * 255);
fz_drop_pixmap(dev->ctx, shape);
}
}
if (state->blendmode & FZ_BLEND_KNOCKOUT)
fz_knockout_end(dev);
}