File size: 5,716 Bytes
714e7c4 | 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 | /* -*- mode: c++; c-basic-offset: 4 -*- */
#define NO_IMPORT_ARRAY
#include "_backend_agg.h"
#include "mplutils.h"
void BufferRegion::to_string_argb(uint8_t *buf)
{
unsigned char *pix;
unsigned char tmp;
size_t i, j;
memcpy(buf, data, (size_t) height * stride);
for (i = 0; i < (size_t)height; ++i) {
pix = buf + i * stride;
for (j = 0; j < (size_t)width; ++j) {
// Convert rgba to argb
tmp = pix[2];
pix[2] = pix[0];
pix[0] = tmp;
pix += 4;
}
}
}
RendererAgg::RendererAgg(unsigned int width, unsigned int height, double dpi)
: width(width),
height(height),
dpi(dpi),
NUMBYTES((size_t)width * (size_t)height * 4),
pixBuffer(NULL),
renderingBuffer(),
alphaBuffer(NULL),
alphaMaskRenderingBuffer(),
alphaMask(alphaMaskRenderingBuffer),
pixfmtAlphaMask(alphaMaskRenderingBuffer),
rendererBaseAlphaMask(),
rendererAlphaMask(),
scanlineAlphaMask(),
slineP8(),
slineBin(),
pixFmt(),
rendererBase(),
rendererAA(),
rendererBin(),
theRasterizer(32768),
lastclippath(NULL),
_fill_color(agg::rgba(1, 1, 1, 0))
{
unsigned stride(width * 4);
pixBuffer = new agg::int8u[NUMBYTES];
renderingBuffer.attach(pixBuffer, width, height, stride);
pixFmt.attach(renderingBuffer);
rendererBase.attach(pixFmt);
rendererBase.clear(_fill_color);
rendererAA.attach(rendererBase);
rendererBin.attach(rendererBase);
hatch_size = int(dpi);
hatchBuffer = new agg::int8u[hatch_size * hatch_size * 4];
hatchRenderingBuffer.attach(hatchBuffer, hatch_size, hatch_size, hatch_size * 4);
}
RendererAgg::~RendererAgg()
{
delete[] hatchBuffer;
delete[] alphaBuffer;
delete[] pixBuffer;
}
void RendererAgg::create_alpha_buffers()
{
if (!alphaBuffer) {
alphaBuffer = new agg::int8u[width * height];
alphaMaskRenderingBuffer.attach(alphaBuffer, width, height, width);
rendererBaseAlphaMask.attach(pixfmtAlphaMask);
rendererAlphaMask.attach(rendererBaseAlphaMask);
}
}
BufferRegion *RendererAgg::copy_from_bbox(agg::rect_d in_rect)
{
agg::rect_i rect(
(int)in_rect.x1, height - (int)in_rect.y2, (int)in_rect.x2, height - (int)in_rect.y1);
BufferRegion *reg = NULL;
reg = new BufferRegion(rect);
agg::rendering_buffer rbuf;
rbuf.attach(reg->get_data(), reg->get_width(), reg->get_height(), reg->get_stride());
pixfmt pf(rbuf);
renderer_base rb(pf);
rb.copy_from(renderingBuffer, &rect, -rect.x1, -rect.y1);
return reg;
}
void RendererAgg::restore_region(BufferRegion ®ion)
{
if (region.get_data() == NULL) {
throw std::runtime_error("Cannot restore_region from NULL data");
}
agg::rendering_buffer rbuf;
rbuf.attach(region.get_data(), region.get_width(), region.get_height(), region.get_stride());
rendererBase.copy_from(rbuf, 0, region.get_rect().x1, region.get_rect().y1);
}
// Restore the part of the saved region with offsets
void
RendererAgg::restore_region(BufferRegion ®ion, int xx1, int yy1, int xx2, int yy2, int x, int y )
{
if (region.get_data() == NULL) {
throw std::runtime_error("Cannot restore_region from NULL data");
}
agg::rect_i &rrect = region.get_rect();
agg::rect_i rect(xx1 - rrect.x1, (yy1 - rrect.y1), xx2 - rrect.x1, (yy2 - rrect.y1));
agg::rendering_buffer rbuf;
rbuf.attach(region.get_data(), region.get_width(), region.get_height(), region.get_stride());
rendererBase.copy_from(rbuf, &rect, x, y);
}
bool RendererAgg::render_clippath(py::PathIterator &clippath,
const agg::trans_affine &clippath_trans,
e_snap_mode snap_mode)
{
typedef agg::conv_transform<py::PathIterator> transformed_path_t;
typedef PathNanRemover<transformed_path_t> nan_removed_t;
/* Unlike normal Paths, the clip path cannot be clipped to the Figure bbox,
* because it needs to remain a complete closed path, so there is no
* PathClipper<nan_removed_t> step. */
typedef PathSnapper<nan_removed_t> snapped_t;
typedef PathSimplifier<snapped_t> simplify_t;
typedef agg::conv_curve<simplify_t> curve_t;
bool has_clippath = (clippath.total_vertices() != 0);
if (has_clippath &&
(clippath.get_id() != lastclippath || clippath_trans != lastclippath_transform)) {
create_alpha_buffers();
agg::trans_affine trans(clippath_trans);
trans *= agg::trans_affine_scaling(1.0, -1.0);
trans *= agg::trans_affine_translation(0.0, (double)height);
rendererBaseAlphaMask.clear(agg::gray8(0, 0));
transformed_path_t transformed_clippath(clippath, trans);
nan_removed_t nan_removed_clippath(transformed_clippath, true, clippath.has_codes());
snapped_t snapped_clippath(nan_removed_clippath, snap_mode, clippath.total_vertices(), 0.0);
simplify_t simplified_clippath(snapped_clippath,
clippath.should_simplify() && !clippath.has_codes(),
clippath.simplify_threshold());
curve_t curved_clippath(simplified_clippath);
theRasterizer.add_path(curved_clippath);
rendererAlphaMask.color(agg::gray8(255, 255));
agg::render_scanlines(theRasterizer, scanlineAlphaMask, rendererAlphaMask);
lastclippath = clippath.get_id();
lastclippath_transform = clippath_trans;
}
return has_clippath;
}
void RendererAgg::clear()
{
//"clear the rendered buffer";
rendererBase.clear(_fill_color);
}
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