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add 'add_stroke_effect' script function

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GenevensiS
2026-01-14 11:48:17 +01:00
parent d10a71e925
commit 8afd412021
10 changed files with 128 additions and 111 deletions
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src/data/symbol_font.cpp
+5 -81
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@@ -301,96 +301,20 @@ void SymbolFont::draw(RotatedDC& dc, RealRect rect, double scale, const SymbolFo
RealPoint bmp_pos = align_in_rect(font.alignment(), bmp_size, sym_rect);
// 2. draw potential stroke or shadow
if (font.hasStroke()) {
// add margin
Image img = bmp.ConvertToImage();
if (!img.HasAlpha()) set_alpha(img, 0);
int blur_radius = lround(font.stroke_blur() * s_scale);
int stroke_radius = lround(font.stroke_radius() * s_scale);
int margin = blur_radius + stroke_radius;
int s_width = img.GetWidth() + 2 * margin, s_height = img.GetHeight() + 2 * margin;
int x_end = s_width - margin;
int y_end = s_height - margin;
wxImage s_img(s_width, s_height, false);
s_img.InitAlpha();
// convert to stroke color
Byte* s_data = s_img.GetData();
Byte* s_alpha = s_img.GetAlpha(), *alpha = img.GetAlpha();
Color color = font.stroke_color();
unsigned char r = color.Red();
unsigned char g = color.Green();
unsigned char b = color.Blue();
unsigned char a = color.Alpha();
for (int y = 0 ; y < s_height ; ++y) {
for (int x = 0 ; x < s_width ; ++x) {
s_data[0] = r;
s_data[1] = g;
s_data[2] = b;
s_data += 3;
if (margin <= x && x < x_end && margin <= y && y < y_end) {
s_alpha[0] = alpha[0] * a / 255;
alpha += 1;
}
else {
s_alpha[0] = 0;
}
s_alpha += 1;
}
}
// add stroke effect
for (int i = 0 ; i < stroke_radius ; ++i) {
thicken_image_alpha(s_img, 1);
}
// add blur
for (int i = 0 ; i < blur_radius ; ++i) {
blur_image_alpha(s_img, 3);
}
// draw
Image s_img = make_stroke_image(bmp.ConvertToImage(), font.stroke_color(), stroke_radius, blur_radius);
RealSize s_size = dc.trInvS(RealSize(s_img));
RealPoint s_pos(bmp_pos.x - (s_size.width - bmp_size.width)/2, bmp_pos.y - (s_size.height - bmp_size.height)/2);
dc.DrawImage(s_img, s_pos);
}
else if (font.hasShadow()) {
// add margin
Image img = bmp.ConvertToImage();
if (!img.HasAlpha()) set_alpha(img, 0);
int margin = lround(font.shadow_blur() * s_scale);
int s_width = img.GetWidth() + 2 * margin, s_height = img.GetHeight() + 2 * margin;
int x_end = s_width - margin;
int y_end = s_height - margin;
wxImage s_img(s_width, s_height, false);
s_img.InitAlpha();
// convert to shadow color
Byte* s_data = s_img.GetData();
Byte* s_alpha = s_img.GetAlpha(), *alpha = img.GetAlpha();
Color color = font.shadow_color();
unsigned char r = color.Red();
unsigned char g = color.Green();
unsigned char b = color.Blue();
unsigned char a = color.Alpha();
for (int y = 0 ; y < s_height ; ++y) {
for (int x = 0 ; x < s_width ; ++x) {
s_data[0] = r;
s_data[1] = g;
s_data[2] = b;
s_data += 3;
if (margin <= x && x < x_end && margin <= y && y < y_end) {
s_alpha[0] = alpha[0] * a / 255;
alpha += 1;
}
else {
s_alpha[0] = 0;
}
s_alpha += 1;
}
}
// add blur
for (int i = 0 ; i < margin ; ++i) {
blur_image_alpha(s_img, 3);
}
// draw
int blur_radius = lround(font.shadow_blur() * s_scale);
Image s_img = make_stroke_image(bmp.ConvertToImage(), font.shadow_color(), 0, blur_radius);
RealSize s_size = dc.trInvS(RealSize(s_img));
RealPoint s_pos(bmp_pos.x - (s_size.width - bmp_size.width)/2, bmp_pos.y - (s_size.height - bmp_size.height)/2);
dc.DrawImage(s_img, s_pos + RealPoint(font.shadow_displacement_x(), font.shadow_displacement_y()) * scale);
RealSize s_displacement = dc.trInvS(RealSize(font.shadow_displacement_x, font.shadow_displacement_y) * s_scale);
dc.DrawImage(s_img, s_pos + s_displacement);
}
bmps.push_back(std::move(bmp));
bmp_sizes.push_back(bmp_size);