Repository navigation
Expand file tree
/
Copy path_backend_agg_wrapper.cpp
More file actions
298 lines (265 loc) · 10.9 KB
/
Copy path_backend_agg_wrapper.cpp
File metadata and controls
298 lines (265 loc) · 10.9 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
#include <pybind11/pybind11.h>
#include <pybind11/numpy.h>
#include <pybind11/stl.h>
#ifdef PYBIND11_HAS_SUBINTERPRETER_SUPPORT
#include <pybind11/subinterpreter.h>
#endif
#include "mplutils.h"
#include "py_converters.h"
#include "_backend_agg.h"
namespace py = pybind11;
using namespace pybind11::literals;
/**********************************************************************
* BufferRegion
* */
/* TODO: This doesn't seem to be used internally. Remove? */
static void
PyBufferRegion_set_x(BufferRegion *self, int x)
{
self->get_rect().x1 = x;
}
static void
PyBufferRegion_set_y(BufferRegion *self, int y)
{
self->get_rect().y1 = y;
}
static py::object
PyBufferRegion_get_extents(BufferRegion *self)
{
agg::rect_i rect = self->get_rect();
return py::make_tuple(rect.x1, rect.y1, rect.x2, rect.y2);
}
/**********************************************************************
* RendererAgg
* */
static void
PyRendererAgg_draw_path(RendererAgg *self,
GCAgg &gc,
mpl::PathIterator path,
agg::trans_affine trans,
py::object rgbFace)
{
agg::rgba face = rgbFace.cast<agg::rgba>();
if (!rgbFace.is_none()) {
if (gc.forced_alpha || rgbFace.cast<py::sequence>().size() == 3) {
face.a = gc.alpha;
}
}
self->draw_path(gc, path, trans, face);
}
static void
PyRendererAgg_draw_text_image(RendererAgg *self,
py::array_t<agg::int8u, py::array::c_style | py::array::forcecast> image_obj,
int x, int y, double angle, GCAgg &gc)
{
// TODO: This really shouldn't be mutable, but Agg's renderer buffers aren't const.
auto image = image_obj.mutable_unchecked<2>();
self->draw_text_image(gc, image, x, y, angle);
}
static void
PyRendererAgg_draw_text_images(
RendererAgg *self,
py::array_t<agg::int8u, py::array::c_style | py::array::forcecast> buffer_obj,
py::array_t<py::ssize_t, py::array::c_style | py::array::forcecast> positions_obj,
GCAgg &gc)
{
if (positions_obj.ndim() != 2 || positions_obj.shape(1) != 5) {
throw py::value_error("positions must be of shape (N, 5)");
}
auto buffer = buffer_obj.unchecked<1>();
auto positions = positions_obj.unchecked<2>();
// The renderer indexes into the buffer with these.
auto const& size = buffer.shape(0);
for (auto i = 0; i < positions.shape(0); i++) {
auto const& offset = positions(i, 0);
auto const& rows = positions(i, 1);
auto const& cols = positions(i, 2);
if (offset < 0 || rows < 0 || cols < 0 || offset > size ||
(rows > 0 && cols > (size - offset) / rows)) {
throw py::value_error(
"positions describes a bitmap outside of buffer at row " +
std::to_string(i));
}
}
self->draw_text_images(gc, buffer, positions);
}
static void
PyRendererAgg_draw_markers(RendererAgg *self,
GCAgg &gc,
mpl::PathIterator marker_path,
agg::trans_affine marker_path_trans,
mpl::PathIterator path,
agg::trans_affine trans,
py::object rgbFace)
{
agg::rgba face = rgbFace.cast<agg::rgba>();
if (!rgbFace.is_none()) {
if (gc.forced_alpha || rgbFace.cast<py::sequence>().size() == 3) {
face.a = gc.alpha;
}
}
self->draw_markers(gc, marker_path, marker_path_trans, path, trans, face);
}
static void
PyRendererAgg_draw_image(RendererAgg *self,
GCAgg &gc,
double x,
double y,
py::array_t<agg::int8u, py::array::c_style | py::array::forcecast> image_obj)
{
// TODO: This really shouldn't be mutable, but Agg's renderer buffers aren't const.
auto image = image_obj.mutable_unchecked<3>();
x = mpl::round(x);
y = mpl::round(y);
self->draw_image(gc, x, y, image);
}
static void
PyRendererAgg_draw_path_collection(RendererAgg *self,
GCAgg &gc,
agg::trans_affine master_transform,
mpl::PathGenerator paths,
py::array_t<double> transforms_obj,
py::array_t<double> offsets_obj,
agg::trans_affine offset_trans,
py::array_t<double> facecolors_obj,
py::array_t<double> edgecolors_obj,
py::array_t<double> linewidths_obj,
DashesVector dashes,
py::array_t<uint8_t> antialiaseds_obj,
py::object Py_UNUSED(ignored_obj),
// offset position is no longer used
py::object Py_UNUSED(offset_position_obj),
py::array_t<double> hatchcolors_obj)
{
auto transforms = convert_transforms(transforms_obj);
auto offsets = convert_points(offsets_obj);
auto facecolors = convert_colors(facecolors_obj);
auto edgecolors = convert_colors(edgecolors_obj);
auto hatchcolors = convert_colors(hatchcolors_obj);
auto linewidths = linewidths_obj.unchecked<1>();
auto antialiaseds = antialiaseds_obj.unchecked<1>();
self->draw_path_collection(gc,
master_transform,
paths,
transforms,
offsets,
offset_trans,
facecolors,
edgecolors,
linewidths,
dashes,
antialiaseds,
hatchcolors);
}
static void
PyRendererAgg_draw_quad_mesh(RendererAgg *self,
GCAgg &gc,
agg::trans_affine master_transform,
unsigned int mesh_width,
unsigned int mesh_height,
py::array_t<double, py::array::c_style | py::array::forcecast> coordinates_obj,
py::array_t<double> offsets_obj,
agg::trans_affine offset_trans,
py::array_t<double> facecolors_obj,
bool antialiased,
py::array_t<double> edgecolors_obj)
{
auto coordinates = coordinates_obj.mutable_unchecked<3>();
auto offsets = convert_points(offsets_obj);
auto facecolors = convert_colors(facecolors_obj);
auto edgecolors = convert_colors(edgecolors_obj);
self->draw_quad_mesh(gc,
master_transform,
mesh_width,
mesh_height,
coordinates,
offsets,
offset_trans,
facecolors,
antialiased,
edgecolors);
}
static void
PyRendererAgg_draw_gouraud_triangles(RendererAgg *self,
GCAgg &gc,
py::array_t<double> points_obj,
py::array_t<double> colors_obj,
agg::trans_affine trans)
{
auto points = points_obj.unchecked<3>();
auto colors = colors_obj.unchecked<3>();
self->draw_gouraud_triangles(gc, points, colors, trans);
}
#ifdef PYBIND11_HAS_SUBINTERPRETER_SUPPORT
PYBIND11_MODULE(_backend_agg, m,
py::mod_gil_not_used(), py::multiple_interpreters::per_interpreter_gil())
#else
PYBIND11_MODULE(_backend_agg, m, py::mod_gil_not_used())
#endif
{
py::classh<RendererAgg>(m, "RendererAgg", py::buffer_protocol())
.def(py::init<unsigned int, unsigned int, double>(),
"width"_a, "height"_a, "dpi"_a)
.def("draw_path", &PyRendererAgg_draw_path,
"gc"_a, "path"_a, "trans"_a, "face"_a = nullptr)
.def("draw_markers", &PyRendererAgg_draw_markers,
"gc"_a, "marker_path"_a, "marker_path_trans"_a, "path"_a, "trans"_a,
"face"_a = nullptr)
.def("draw_text_image", &PyRendererAgg_draw_text_image,
"image"_a, "x"_a, "y"_a, "angle"_a, "gc"_a)
.def("draw_text_images", &PyRendererAgg_draw_text_images,
"buffer"_a, "positions"_a, "gc"_a)
.def("draw_image", &PyRendererAgg_draw_image,
"gc"_a, "x"_a, "y"_a, "image"_a)
.def("draw_path_collection", &PyRendererAgg_draw_path_collection,
"gc"_a, "master_transform"_a, "paths"_a, "transforms"_a, "offsets"_a,
"offset_trans"_a, "facecolors"_a, "edgecolors"_a, "linewidths"_a,
"dashes"_a, "antialiaseds"_a, "ignored"_a, "offset_position"_a,
py::kw_only(), "hatchcolors"_a = py::array_t<double>().reshape({0, 4}))
.def("draw_quad_mesh", &PyRendererAgg_draw_quad_mesh,
"gc"_a, "master_transform"_a, "mesh_width"_a, "mesh_height"_a,
"coordinates"_a, "offsets"_a, "offset_trans"_a, "facecolors"_a,
"antialiased"_a, "edgecolors"_a)
.def("_draw_gouraud_triangles", &PyRendererAgg_draw_gouraud_triangles,
"gc"_a, "points"_a, "colors"_a, "trans"_a = nullptr)
.def("clear", &RendererAgg::clear)
.def("copy_from_bbox", &RendererAgg::copy_from_bbox,
"bbox"_a)
.def("restore_region",
py::overload_cast<BufferRegion&>(&RendererAgg::restore_region),
"region"_a)
.def("restore_region",
py::overload_cast<BufferRegion&, int, int, int, int, int, int>(&RendererAgg::restore_region),
"region"_a, "xx1"_a, "yy1"_a, "xx2"_a, "yy2"_a, "x"_a, "y"_a)
.def_buffer([](RendererAgg *renderer) -> py::buffer_info {
std::vector<py::ssize_t> shape {
static_cast<py::ssize_t>(renderer->get_height()),
static_cast<py::ssize_t>(renderer->get_width()),
4
};
std::vector<py::ssize_t> strides {
static_cast<py::ssize_t>(renderer->get_width() * 4),
4,
1
};
return py::buffer_info(renderer->pixBuffer, shape, strides);
});
py::classh<BufferRegion>(m, "BufferRegion", py::buffer_protocol())
// BufferRegion is not constructible from Python, thus no py::init is added.
.def("set_x", &PyBufferRegion_set_x)
.def("set_y", &PyBufferRegion_set_y)
.def("get_extents", &PyBufferRegion_get_extents)
.def_buffer([](BufferRegion *buffer) -> py::buffer_info {
std::vector<py::ssize_t> shape {
buffer->get_height(),
buffer->get_width(),
4
};
std::vector<py::ssize_t> strides {
buffer->get_width() * 4,
4,
1
};
return py::buffer_info(buffer->get_data(), shape, strides);
});
}