Class: Rixmap::Deformer::AffineDeformer
- Inherits:
-
BaseDeformer
- Object
- BaseDeformer
- Rixmap::Deformer::AffineDeformer
- Defined in:
- src/rixmapdeformation.cxx,
src/rixmapdeformation.cxx
Overview
アフィン変換による変形処理実装.
Instance Attribute Summary collapse
Instance Method Summary collapse
-
#deform(image, fit = false) ⇒ Rixmap::Image
アフィン変換による変形処理を実行します.
-
#initialize(matrix = nil, ipo = nil)
constructor
private
アフィン変換による変形処理実装オブジェクトを初期化します.
Methods inherited from BaseDeformer
#inspect, #interpolator, #interpolator=
Constructor Details
#initialize(matrix = nil, ipo = nil) (private)
136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 |
# File 'src/rixmapdeformation.cxx', line 136
static VALUE AffineDeformer_initialize(int argc, VALUE* argv, VALUE self) {
VALUE argMatrix = Qnil, argIPO = Qnil;
rb_scan_args(argc, argv, "02", &argMatrix, &argIPO);
// 自分を初期化
if (NIL_P(argMatrix)) {
rb_iv_set(self, "@matrix", rb_class_new_instance(0, NULL, cRixmapAffineMatrix));
} else {
rb_iv_set(self, "@matrix", argMatrix);
}
// 親を初期化
{
VALUE sargs[1] = {argIPO};
rb_call_super(1, sargs);
}
return self;
}
|
Instance Attribute Details
#matrix ⇒ Object
Instance Method Details
#deform(image, fit = false) ⇒ Rixmap::Image
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 |
# File 'src/rixmapdeformation.cxx', line 164
static VALUE AffineDeformer_deform(int argc, VALUE* argv, VALUE self) {
// パラメータ処理
VALUE argImage = Qnil, argFit = Qnil;
rb_scan_args(argc, argv, "11", &argImage, &argFit);
// 自分ポインタ
Rixmap::AffineDeformerData* _this = rixmap_unwrap<Rixmap::AffineDeformerData>(self);
// 対象画像
Rixmap::ImageData* srcImage = rixmap_unwrap<Rixmap::ImageData>(argImage);
// 補間処理方法
Rixmap::Interpolator* ipo = NULL;
switch (_this->getInterpolation()) {
case Rixmap::Interpolation::BICUBIC:
ipo = new Rixmap::BicubicInterpolator(srcImage);
break;
default:
ipo = new Rixmap::NOPInterpolator(srcImage);
break;
}
// 画像サイズ調整フラグをC++型に展開
bool fit = false;
if (RTEST(argFit)) {
fit = true;
}
try {
// アフィン変換パラメータ
VALUE matrixObject = rb_iv_get(self, "@matrix");
Rixmap::AffineMatrix* matrix = rixmap_unwrap<Rixmap::AffineMatrix>(matrixObject);
// 画像サイズ調整
int32_t newWidth = srcImage->getWidth();
int32_t newHeight = srcImage->getHeight();
int32_t newXOffset = 0;
int32_t newYOffset = 0;
if (fit) { // サイズ調整有
matrix->matrixize();
// 座標点を取得
Rixmap::Point srcPoints[4] = {
{0.0, 0.0},
{0.0, static_cast<double>(srcImage->getHeight())},
{static_cast<double>(srcImage->getWidth()), 0.0},
{static_cast<double>(srcImage->getWidth()), static_cast<double>(srcImage->getHeight())}
};
Rixmap::Point dstPoint;
int32_t left = INT32_MAX;
int32_t right = INT32_MIN;
int32_t top = INT32_MAX;
int32_t bottom = INT32_MIN;
for (int i = 0; i < 4; i++) {
matrix->deform(srcPoints[i], dstPoint);
if (dstPoint.x < left) {
left = lround(std::floor(dstPoint.x));
}
if (dstPoint.x > right) {
right = lround(std::ceil(dstPoint.x));
}
if (dstPoint.y < top) {
top = lround(std::floor(dstPoint.y));
}
if (dstPoint.y > bottom) {
bottom = lround(std::ceil(dstPoint.y));
}
}
// サイズへ
newWidth = (right - left);
newHeight = (bottom - top);
newXOffset = left;
newYOffset = top;
} else { // サイズ調整なし
// DO NOTHING
}
// 保存先画像を作成
VALUE srcMetadata = Rixmap::Helper::GetImageMetadata(*srcImage);
VALUE dstImageObject = RixmapImage_NewInstance(ipo->getPreferredMode(), newWidth, newHeight, srcMetadata);
Rixmap::ImageData* dstImage = rixmap_unwrap<Rixmap::ImageData>(dstImageObject);
// 移動先チャンネルリスト
const Rixmap::ChannelArray& channels = dstImage->getModeInfo().getChannels();
// 変換処理
matrix->matrixize();
Rixmap::Point src; // 変形前 (元画像) 座標格納先
Rixmap::Point dst; // 変形後 (返却用画像) 座標格納先
for (int32_t dstY = 0; dstY < dstImage->getHeight(); dstY++) {
for (int32_t dstX = 0; dstX < dstImage->getWidth(); dstX++) {
// 変換前座標を取得
dst.x = static_cast<double>(dstX + newXOffset);
dst.y = static_cast<double>(dstY + newYOffset);
matrix->inverse(dst, src);
// 補間処理
ipo->calculate(src.x, src.y);
// ピクセルデータを取り込む
for (auto it = channels.begin(); it != channels.end(); it++) {
uint8_t byte = ipo->get(*it);
dstImage->set(*it, dstX, dstY, byte);
}
}
}
return dstImageObject;
} catch (const std::exception& e) {
if (ipo != NULL) {
delete ipo;
}
rb_raise(rb_eRuntimeError, e.what());
}
}
|