Commit 6c6a7514 authored by Ell's avatar Ell

app: some cleanup in gimppaintcore-loops

In gimp_paint_core_loops_process(), initialize the iterator with
sufficient room for the number of iterators used by the algorithm
hierarchy, instead of a fixed number.

Add an additional 'rect' parameter to the init_step() and
process_rows() algorithm member functions, which receives the area
of the currently-processed chunk, to be used instead of the
iterator's ROI member.  This allows us to pass a NULL iterator to
hierarchies that don't use an iterator, and avoid the stack-
allocated iterator hack we used in this case (and which became even
more problematic with the new iterator API).
parent 6fca9959
......@@ -278,7 +278,8 @@ struct AlgorithmBase
*
* 'params' is the same parameter struct passed to the constructor. 'state'
* is the state object. 'iter' is the iterator; each distinct state object
* uses a distinct iterator. 'roi' is the full region to be processed.
* uses a distinct iterator; if the algorithm hierarchy doesn't use any
* iterator, 'iter' may be NULL. 'roi' is the full region to be processed.
* 'area' is the subregion to be processed by the current state object.
*
* An algorithm that overrides this function should call the 'init()'
......@@ -298,7 +299,8 @@ struct AlgorithmBase
* 'gegl_buffer_iterator_next()' call, and should perform any necessary
* initialization required before processing the current chunk.
*
* The parameters are the same as for 'init()'.
* The parameters are the same as for 'init()', with the addition of 'rect',
* which is the area of the current chunk.
*
* An algorithm that overrides this function should call the 'init_step()'
* function of its base class first, using the same arguments.
......@@ -309,15 +311,16 @@ struct AlgorithmBase
State<Derived> *state,
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area) const
const GeglRectangle *area,
const GeglRectangle *rect) const
{
}
/* The 'process_row()' function is called for each row in the current chunk,
* and should perform the actual processing.
*
* The parameters are the same as for 'init()', with the addition of 'y',
* which is the current row.
* The parameters are the same as for 'init_step()', with the addition of
* 'y', which is the current row.
*
* An algorithm that overrides this function should call the 'process_row()'
* function of its base class first, using the same arguments.
......@@ -329,6 +332,7 @@ struct AlgorithmBase
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area,
const GeglRectangle *rect,
gint y) const
{
}
......@@ -636,9 +640,10 @@ struct CombinePaintMaskToCanvasMaskToPaintBufAlpha :
State<Derived> *state,
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area) const
const GeglRectangle *area,
const GeglRectangle *rect) const
{
base_type::init_step (params, state, iter, roi, area);
base_type::init_step (params, state, iter, roi, area, rect);
state->canvas_pixel =
(gfloat *) iter->items[base_type::canvas_buffer_iterator].data;
......@@ -651,19 +656,20 @@ struct CombinePaintMaskToCanvasMaskToPaintBufAlpha :
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area,
const GeglRectangle *rect,
gint y) const
{
base_type::process_row (params, state, iter, roi, area, y);
base_type::process_row (params, state, iter, roi, area, rect, y);
gint mask_offset = (y - roi->y) * this->mask_stride +
(iter->items[0].roi.x - roi->x);
gint mask_offset = (y - roi->y) * this->mask_stride +
(rect->x - roi->x);
const mask_type *mask_pixel = &this->mask_data[mask_offset];
gint paint_offset = (y - roi->y) * this->paint_stride +
(iter->items[0].roi.x - roi->x) * 4;
gint paint_offset = (y - roi->y) * this->paint_stride +
(rect->x - roi->x) * 4;
gfloat *paint_pixel = &this->paint_data[paint_offset];
gint x;
for (x = 0; x < iter->items[0].roi.width; x++)
for (x = 0; x < rect->width; x++)
{
if (base_type::stipple)
{
......@@ -733,9 +739,10 @@ struct CombinePaintMaskToCanvasMask :
State<Derived> *state,
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area) const
const GeglRectangle *area,
const GeglRectangle *rect) const
{
base_type::init_step (params, state, iter, roi, area);
base_type::init_step (params, state, iter, roi, area, rect);
state->canvas_pixel =
(gfloat *) iter->items[base_type::canvas_buffer_iterator].data;
......@@ -748,16 +755,17 @@ struct CombinePaintMaskToCanvasMask :
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area,
const GeglRectangle *rect,
gint y) const
{
base_type::process_row (params, state, iter, roi, area, y);
base_type::process_row (params, state, iter, roi, area, rect, y);
gint mask_offset = (y - roi->y) * this->mask_stride +
(iter->items[0].roi.x - roi->x);
gint mask_offset = (y - roi->y) * this->mask_stride +
(rect->x - roi->x);
const mask_type *mask_pixel = &this->mask_data[mask_offset];
gint x;
for (x = 0; x < iter->items[0].roi.width; x++)
for (x = 0; x < rect->width; x++)
{
if (base_type::stipple)
{
......@@ -821,9 +829,10 @@ struct CanvasBufferToPaintBufAlpha : CanvasBufferIterator<Base,
State<Derived> *state,
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area) const
const GeglRectangle *area,
const GeglRectangle *rect) const
{
base_type::init_step (params, state, iter, roi, area);
base_type::init_step (params, state, iter, roi, area, rect);
state->canvas_pixel =
(const gfloat *) iter->items[base_type::canvas_buffer_iterator].data;
......@@ -836,18 +845,19 @@ struct CanvasBufferToPaintBufAlpha : CanvasBufferIterator<Base,
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area,
const GeglRectangle *rect,
gint y) const
{
base_type::process_row (params, state, iter, roi, area, y);
base_type::process_row (params, state, iter, roi, area, rect, y);
/* Copy the canvas buffer in rect to the paint buffer's alpha channel */
gint paint_offset = (y - roi->y) * this->paint_stride +
(iter->items[0].roi.x - roi->x) * 4;
gint paint_offset = (y - roi->y) * this->paint_stride +
(rect->x - roi->x) * 4;
gfloat *paint_pixel = &this->paint_data[paint_offset];
gint x;
for (x = 0; x < iter->items[0].roi.width; x++)
for (x = 0; x < rect->width; x++)
{
paint_pixel[3] *= *state->canvas_pixel;
......@@ -902,19 +912,20 @@ struct PaintMaskToPaintBuffer : Base
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area,
const GeglRectangle *rect,
gint y) const
{
Base::process_row (params, state, iter, roi, area, y);
Base::process_row (params, state, iter, roi, area, rect, y);
gint paint_offset = (y - roi->y) * this->paint_stride +
(iter->items[0].roi.x - roi->x) * 4;
gint paint_offset = (y - roi->y) * this->paint_stride +
(rect->x - roi->x) * 4;
gfloat *paint_pixel = &this->paint_data[paint_offset];
gint mask_offset = (y - roi->y) * this->mask_stride +
(iter->items[0].roi.x - roi->x);
gint mask_offset = (y - roi->y) * this->mask_stride +
(rect->x - roi->x);
const mask_type *mask_pixel = &this->mask_data[mask_offset];
gint x;
for (x = 0; x < iter->items[0].roi.width; x++)
for (x = 0; x < rect->width; x++)
{
paint_pixel[3] *= value_to_float (*mask_pixel) * params->paint_opacity;
......@@ -1020,23 +1031,24 @@ struct DoLayerBlend : Base
State<Derived> *state,
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area) const
const GeglRectangle *area,
const GeglRectangle *rect) const
{
Base::init_step (params, state, iter, roi, area);
Base::init_step (params, state, iter, roi, area, rect);
state->out_pixel = (gfloat *) iter->items[iterator_base + 0].data;
state->in_pixel = (gfloat *) iter->items[iterator_base + 1].data;
state->mask_pixel = NULL;
state->paint_pixel = this->paint_data +
(iter->items[0].roi.y - roi->y) * this->paint_stride +
(iter->items[0].roi.x - roi->x) * 4;
state->paint_pixel = this->paint_data +
(rect->y - roi->y) * this->paint_stride +
(rect->x - roi->x) * 4;
if (params->mask_buffer)
state->mask_pixel = (gfloat *) iter->items[iterator_base + 2].data;
state->process_roi.x = iter->items[0].roi.x;
state->process_roi.width = iter->items[0].roi.width;
state->process_roi.x = rect->x;
state->process_roi.width = rect->width;
state->process_roi.height = 1;
}
......@@ -1047,9 +1059,10 @@ struct DoLayerBlend : Base
GeglBufferIterator *iter,
const GeglRectangle *roi,
const GeglRectangle *area,
const GeglRectangle *rect,
gint y) const
{
Base::process_row (params, state, iter, roi, area, y);
Base::process_row (params, state, iter, roi, area, rect, y);
state->process_roi.y = y;
......@@ -1058,14 +1071,14 @@ struct DoLayerBlend : Base
state->paint_pixel,
state->mask_pixel,
state->out_pixel,
iter->items[0].roi.width,
rect->width,
&state->process_roi,
0);
state->in_pixel += iter->items[0].roi.width * 4;
state->out_pixel += iter->items[0].roi.width * 4;
state->in_pixel += rect->width * 4;
state->out_pixel += rect->width * 4;
if (params->mask_buffer)
state->mask_pixel += iter->items[0].roi.width;
state->mask_pixel += rect->width;
state->paint_pixel += this->paint_stride;
}
};
......@@ -1130,36 +1143,34 @@ gimp_paint_core_loops_process (const GimpPaintCoreLoopsParams *params,
{
GeglBufferIterator *iter;
iter = gegl_buffer_iterator_empty_new (4);
iter = gegl_buffer_iterator_empty_new (Algorithm::n_iterators);
algorithm.init (params, &state, iter, &roi, area);
while (gegl_buffer_iterator_next (iter))
{
algorithm.init_step (params, &state, iter, &roi, area);
const GeglRectangle *rect = &iter->items[0].roi;
for (y = 0; y < iter->items[0].roi.height; y++)
algorithm.init_step (params, &state, iter, &roi, area, rect);
for (y = 0; y < rect->height; y++)
{
algorithm.process_row (params, &state,
iter, &roi, area,
iter->items[0].roi.y + y);
iter, &roi, area, rect,
rect->y + y);
}
}
}
else
{
GeglBufferIterator iter[2];
iter[0].items[0].roi = *area;
algorithm.init (params, &state, &iter[0], &roi, area);
algorithm.init_step (params, &state, &iter[0], &roi, area);
algorithm.init (params, &state, NULL, &roi, area);
algorithm.init_step (params, &state, NULL, &roi, area, area);
for (y = 0; y < iter[0].items[0].roi.height; y++)
for (y = 0; y < area->height; y++)
{
algorithm.process_row (params, &state,
&iter[0], &roi, area,
iter[0].items[0].roi.y + y);
NULL, &roi, area, area,
area->y + y);
}
}
});
......
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