1 2 3 4 5<!doctype html> 6<html lang="en"> 7<head> 8 <meta charset="utf-8" /> 9 <meta name="viewport" content="width=device-width, initial-scale=1" /> 10 <title>ImageMagick - MagickCore, C API: Draw on an Image</title> 11 <meta name="application-name" content="ImageMagick" /> 12 <meta name="description" content="Use ImageMagick® to create, edit, compose, and convert digital images. 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87 </script> 88 89 </div> 90 91 <main class="container"> 92 <div class="magick-template"> 93<div class="magick-header"> 94<p class="text-center"><a href="draw.html#AcquireDrawInfo">AcquireDrawInfo</a> • <a href="draw.html#CloneDrawInfo">CloneDrawInfo</a> • <a href="draw.html#DestroyDrawInfo">DestroyDrawInfo</a> • <a href="draw.html#DrawAffineImage">DrawAffineImage</a> • <a href="draw.html#DrawClipPath">DrawClipPath</a> • <a href="draw.html#DrawClippingMask">DrawClippingMask</a> • <a href="draw.html#DrawCompositeMask">DrawCompositeMask</a> • <a href="draw.html#DrawGradientImage">DrawGradientImage</a> • <a href="draw.html#DrawImage">DrawImage</a> • <a href="draw.html#DrawPatternPath">DrawPatternPath</a> • <a href="draw.html#DrawPrimitive">DrawPrimitive</a> • <a href="draw.html#GetAffineMatrix">GetAffineMatrix</a></p> 95 96<h2><a href="../../api/MagickCore/draw_8c.html" id="AcquireDrawInfo">AcquireDrawInfo</a></h2> 97 98<p>AcquireDrawInfo() returns a DrawInfo structure properly initialized.</p> 99 100<p>The format of the AcquireDrawInfo method is:</p> 101 102<pre class="text"> 103DrawInfo *AcquireDrawInfo(void) 104</pre> 105 106<h2><a href="../../api/MagickCore/draw_8c.html" id="CloneDrawInfo">CloneDrawInfo</a></h2> 107 108<p>CloneDrawInfo() makes a copy of the given draw_info structure. If NULL is specified, a new DrawInfo structure is created initialized to default values.</p> 109 110<p>The format of the CloneDrawInfo method is:</p> 111 112<pre class="text"> 113DrawInfo *CloneDrawInfo(const ImageInfo *image_info, 114 const DrawInfo *draw_info) 115</pre> 116 117<p>A description of each parameter follows:</p> 118 119<dd> 120</dd> 121 122<dd> </dd> 123<dl class="dl-horizontal"> 124<dt>image_info</dt> 125<dd>the image info. </dd> 126 127<dd> </dd> 128<dt>draw_info</dt> 129<dd>the draw info. </dd> 130 131<dd> </dd> 132</dl> 133<h2><a href="../../api/MagickCore/draw_8c.html" id="DestroyDrawInfo">DestroyDrawInfo</a></h2> 134 135<p>DestroyDrawInfo() deallocates memory associated with an DrawInfo structure.</p> 136 137<p>The format of the DestroyDrawInfo method is:</p> 138 139<pre class="text"> 140DrawInfo *DestroyDrawInfo(DrawInfo *draw_info) 141</pre> 142 143<p>A description of each parameter follows:</p> 144 145<dd> 146</dd> 147 148<dd> </dd> 149<dl class="dl-horizontal"> 150<dt>draw_info</dt> 151<dd>the draw info. </dd> 152 153<dd> </dd> 154</dl> 155<h2><a href="../../api/MagickCore/draw_8c.html" id="DrawAffineImage">DrawAffineImage</a></h2> 156 157<p>DrawAffineImage() composites the source over the destination image as dictated by the affine transform.</p> 158 159<p>The format of the DrawAffineImage method is:</p> 160 161<pre class="text"> 162MagickBooleanType DrawAffineImage(Image *image,const Image *source, 163 const AffineMatrix *affine,ExceptionInfo *exception) 164</pre> 165 166<p>A description of each parameter follows:</p> 167 168<dd> 169</dd> 170 171<dd> </dd> 172<dl class="dl-horizontal"> 173<dt>image</dt> 174<dd>the image. </dd> 175 176<dd> </dd> 177<dt>source</dt> 178<dd>the source image. </dd> 179 180<dd> </dd> 181<dt>affine</dt> 182<dd>the affine transform. </dd> 183 184<dd> </dd> 185<dt>exception</dt> 186<dd>return any errors or warnings in this structure. </dd> 187 188<dd> </dd> 189</dl> 190<h2><a href="../../api/MagickCore/draw_8c.html" id="DrawClipPath">DrawClipPath</a></h2> 191 192<p>DrawClipPath() draws the clip path on the image mask.</p> 193 194<p>The format of the DrawClipPath method is:</p> 195 196<pre class="text"> 197MagickBooleanType DrawClipPath(Image *image,const DrawInfo *draw_info, 198 const char *id,ExceptionInfo *exception) 199</pre> 200 201<p>A description of each parameter follows:</p> 202 203<dd> 204</dd> 205 206<dd> </dd> 207<dl class="dl-horizontal"> 208<dt>image</dt> 209<dd>the image. </dd> 210 211<dd> </dd> 212<dt>draw_info</dt> 213<dd>the draw info. </dd> 214 215<dd> </dd> 216<dt>id</dt> 217<dd>the clip path id. </dd> 218 219<dd> </dd> 220<dt>exception</dt> 221<dd>return any errors or warnings in this structure. </dd> 222 223<dd> </dd> 224</dl> 225<h2><a href="../../api/MagickCore/draw_8c.html" id="DrawClippingMask">DrawClippingMask</a></h2> 226 227<p>DrawClippingMask() draws the clip path and returns it as an image clipping mask.</p> 228 229<p>The format of the DrawClippingMask method is:</p> 230 231<pre class="text"> 232Image *DrawClippingMask(Image *image,const DrawInfo *draw_info, 233 const char *id,const char *clip_path,ExceptionInfo *exception) 234</pre> 235 236<p>A description of each parameter follows:</p> 237 238<dd> 239</dd> 240 241<dd> </dd> 242<dl class="dl-horizontal"> 243<dt>image</dt> 244<dd>the image. </dd> 245 246<dd> </dd> 247<dt>draw_info</dt> 248<dd>the draw info. </dd> 249 250<dd> </dd> 251<dt>id</dt> 252<dd>the clip path id. </dd> 253 254<dd> </dd> 255<dt>clip_path</dt> 256<dd>the clip path. </dd> 257 258<dd> </dd> 259<dt>exception</dt> 260<dd>return any errors or warnings in this structure. </dd> 261 262<dd> </dd> 263</dl> 264<h2><a href="../../api/MagickCore/draw_8c.html" id="DrawCompositeMask">DrawCompositeMask</a></h2> 265 266<p>DrawCompositeMask() draws the mask path and returns it as an image mask.</p> 267 268<p>The format of the DrawCompositeMask method is:</p> 269 270<pre class="text"> 271Image *DrawCompositeMask(Image *image,const DrawInfo *draw_info, 272 const char *id,const char *mask_path,ExceptionInfo *exception) 273</pre> 274 275<p>A description of each parameter follows:</p> 276 277<dd> 278</dd> 279 280<dd> </dd> 281<dl class="dl-horizontal"> 282<dt>image</dt> 283<dd>the image. </dd> 284 285<dd> </dd> 286<dt>draw_info</dt> 287<dd>the draw info. </dd> 288 289<dd> </dd> 290<dt>id</dt> 291<dd>the mask path id. </dd> 292 293<dd> </dd> 294<dt>mask_path</dt> 295<dd>the mask path. </dd> 296 297<dd> </dd> 298<dt>exception</dt> 299<dd>return any errors or warnings in this structure. </dd> 300 301<dd> </dd> 302</dl> 303<h2><a href="../../api/MagickCore/draw_8c.html" id="DrawGradientImage">DrawGradientImage</a></h2> 304 305<p>DrawGradientImage() draws a linear gradient on the image.</p> 306 307<p>The format of the DrawGradientImage method is:</p> 308 309<pre class="text"> 310MagickBooleanType DrawGradientImage(Image *image, 311 const DrawInfo *draw_info,ExceptionInfo *exception) 312</pre> 313 314<p>A description of each parameter follows:</p> 315 316<dd> 317</dd> 318 319<dd> </dd> 320<dl class="dl-horizontal"> 321<dt>image</dt> 322<dd>the image. </dd> 323 324<dd> </dd> 325<dt>draw_info</dt> 326<dd>the draw info. </dd> 327 328<dd> </dd> 329<dt>exception</dt> 330<dd>return any errors or warnings in this structure. </dd> 331 332<dd> </dd> 333</dl> 334<h2><a href="../../api/MagickCore/draw_8c.html" id="DrawImage">DrawImage</a></h2> 335 336<p>DrawImage() draws a graphic primitive on your image. The primitive may be represented as a string or filename. Precede the filename with an "at" sign (@) and the contents of the file are drawn on the image. You can affect how text is drawn by setting one or more members of the draw info structure.</p> 337 338<p>The format of the DrawImage method is:</p> 339 340<pre class="text"> 341MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info, 342 ExceptionInfo *exception) 343</pre> 344 345<p>A description of each parameter follows:</p> 346 347<dd> 348</dd> 349 350<dd> </dd> 351<dl class="dl-horizontal"> 352<dt>image</dt> 353<dd>the image. </dd> 354 355<dd> </dd> 356<dt>draw_info</dt> 357<dd>the draw info. </dd> 358 359<dd> </dd> 360<dt>exception</dt> 361<dd>return any errors or warnings in this structure. </dd> 362 363<dd> </dd> 364</dl> 365<h2><a href="../../api/MagickCore/draw_8c.html" id="DrawPatternPath">DrawPatternPath</a></h2> 366 367<p>DrawPatternPath() draws a pattern.</p> 368 369<p>The format of the DrawPatternPath method is:</p> 370 371<pre class="text"> 372MagickBooleanType DrawPatternPath(Image *image,const DrawInfo *draw_info, 373 const char *name,Image **pattern,ExceptionInfo *exception) 374</pre> 375 376<p>A description of each parameter follows:</p> 377 378<dd> 379</dd> 380 381<dd> </dd> 382<dl class="dl-horizontal"> 383<dt>image</dt> 384<dd>the image. </dd> 385 386<dd> </dd> 387<dt>draw_info</dt> 388<dd>the draw info. </dd> 389 390<dd> </dd> 391<dt>name</dt> 392<dd>the pattern name. </dd> 393 394<dd> </dd> 395<dt>image</dt> 396<dd>the image. </dd> 397 398<dd> </dd> 399<dt>exception</dt> 400<dd>return any errors or warnings in this structure. </dd> 401 402<dd> </dd> 403</dl> 404<h2><a href="../../api/MagickCore/draw_8c.html" id="DrawPrimitive">DrawPrimitive</a></h2> 405 406<p>DrawPrimitive() draws a primitive (line, rectangle, ellipse) on the image.</p> 407 408<p>The format of the DrawPrimitive method is:</p> 409 410<pre class="text"> 411MagickBooleanType DrawPrimitive(Image *image,const DrawInfo *draw_info, 412 PrimitiveInfo *primitive_info,ExceptionInfo *exception) 413</pre> 414 415<p>A description of each parameter follows:</p> 416 417<dd> 418</dd> 419 420<dd> </dd> 421<dl class="dl-horizontal"> 422<dt>image</dt> 423<dd>the image. </dd> 424 425<dd> </dd> 426<dt>draw_info</dt> 427<dd>the draw info. </dd> 428 429<dd> </dd> 430<dt>primitive_info</dt> 431<dd>Specifies a pointer to a PrimitiveInfo structure. </dd> 432 433<dd> </dd> 434<dt>exception</dt> 435<dd>return any errors or warnings in this structure. </dd> 436 437<dd> </dd> 438</dl> 439<h2><a href="../../api/MagickCore/draw_8c.html" id="GetAffineMatrix">GetAffineMatrix</a></h2> 440 441<p>GetAffineMatrix() returns an AffineMatrix initialized to the identity matrix.</p> 442 443<p>The format of the GetAffineMatrix method is:</p> 444 445<pre class="text"> 446void GetAffineMatrix(AffineMatrix *affine_matrix) 447</pre> 448 449<p>A description of each parameter follows:</p> 450 451<dd> 452</dd> 453 454<dd> </dd> 455<dl class="dl-horizontal"> 456<dt>affine_matrix</dt> 457<dd>the affine matrix. </dd> 458 459<dd> </dd> 460</dl> 461</div> 462 </div> 463 </main><!-- 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