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minor update

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This commit is contained in:
blueloveTH 2025-12-10 00:29:40 +08:00
parent 5fd00512bf
commit e3bd4cfa95
2 changed files with 58 additions and 1 deletions
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55
3rd/cute_png/src/cute_png.c
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@ -258,6 +258,59 @@ static bool cute_png_Image__to_rgb565_file(int argc, py_Ref argv) {
#undef CONVERT_TO_RGB565
}
static bool cute_png_Image__paste(int argc, py_Ref argv) {
PY_CHECK_ARGC(8);
PY_CHECK_ARG_TYPE(1, py_gettype("cute_png", py_name("Image"))); // src_img
PY_CHECK_ARG_TYPE(2, tp_vec2i); // src_pos
PY_CHECK_ARG_TYPE(3, tp_vec2i); // dst_pos
PY_CHECK_ARG_TYPE(4, tp_int); // width
PY_CHECK_ARG_TYPE(5, tp_int); // height
PY_CHECK_ARG_TYPE(6, tp_color32); // fg
PY_CHECK_ARG_TYPE(7, tp_color32); // bg
cp_image_t* dst_image = py_touserdata(argv);
cp_image_t* src_image = py_touserdata(py_arg(1));
c11_vec2i src_pos = py_tovec2i(py_arg(2));
c11_vec2i dst_pos = py_tovec2i(py_arg(3));
int width = py_toint(py_arg(4));
int height = py_toint(py_arg(5));
c11_color32 fg = py_tocolor32(py_arg(6));
c11_color32 bg = py_tocolor32(py_arg(7));
for(int y = 0; y < height; y++) {
for(int x = 0; x < width; x++) {
int src_x = src_pos.x + x;
int src_y = src_pos.y + y;
int dst_x = dst_pos.x + x;
int dst_y = dst_pos.y + y;
if(src_x >= src_image->w || src_y >= src_image->h) continue;
if(dst_x >= dst_image->w || dst_y >= dst_image->h) continue;
// fill with bg color first
cp_pixel_t dst_pixel = cp_make_pixel_a(bg.r, bg.g, bg.b, 255);
// override with fg * src_pixel
cp_pixel_t src_pixel = src_image->pix[src_y * src_image->w + src_x];
src_pixel.r = (src_pixel.r * (int)fg.r) / 255;
src_pixel.g = (src_pixel.g * (int)fg.g) / 255;
src_pixel.b = (src_pixel.b * (int)fg.b) / 255;
// alpha blend
if(src_pixel.a > 0) {
float alpha = src_pixel.a / 255.0f;
dst_pixel.r = (uint8_t)(src_pixel.r * alpha + dst_pixel.r * (1.0f - alpha));
dst_pixel.g = (uint8_t)(src_pixel.g * alpha + dst_pixel.g * (1.0f - alpha));
dst_pixel.b = (uint8_t)(src_pixel.b * alpha + dst_pixel.b * (1.0f - alpha));
}
dst_image->pix[dst_y * dst_image->w + dst_x] = dst_pixel;
}
}
py_newnone(py_retval());
return true;
}
void pk__add_module_cute_png() {
py_GlobalRef mod = py_newmodule("cute_png");
py_Type tp_image = py_newtype("Image", tp_object, mod, cute_png_Image__dtor);
@ -277,6 +330,8 @@ void pk__add_module_cute_png() {
py_bindmethod(tp_image, "getpixel", cute_png_Image__getpixel);
py_bindmethod(tp_image, "clear", cute_png_Image__clear);
py_bindmethod(tp_image, "paste", cute_png_Image__paste);
py_bindmethod(tp_image, "to_png_bytes", cute_png_Image__to_png_bytes);
py_bindmethod(tp_image, "to_png_file", cute_png_Image__to_png_file);
py_bindmethod(tp_image, "to_rgb565_file", cute_png_Image__to_rgb565_file);

4
include/typings/cute_png.pyi
View File

@ -1,5 +1,5 @@
from array2d import array2d
from vmath import color32
from vmath import color32, vec2i
class Image:
@property
@ -18,6 +18,8 @@ class Image:
def getpixel(self, x: int, y: int) -> color32: ...
def clear(self, color: color32) -> None: ...
def paste(self, src_img: "Image", src_pos: vec2i, dst_pos: vec2i, width: int, height: int, fg: color32, bg: color32) -> None: ...
def to_png_bytes(self) -> bytes: ...
def to_png_file(self, path: str) -> int: ...
def to_rgb565_file(self, path: str) -> int: ...