diff options
| -rw-r--r-- | dmagick/Image.d | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/dmagick/Image.d b/dmagick/Image.d index aa60aab..b0a751c 100644 --- a/dmagick/Image.d +++ b/dmagick/Image.d @@ -9,6 +9,7 @@ module dmagick.Image; import std.conv; import std.math; import std.string; +import core.memory; import core.stdc.string; import core.sys.posix.sys.types; @@ -46,6 +47,7 @@ import dmagick.c.resample; import dmagick.c.resize; import dmagick.c.resource; import dmagick.c.transform; +import dmagick.c.threshold; /** * The image @@ -270,6 +272,68 @@ class Image } /** + * Extracts the pixel data from the specified rectangle. + * + * Params: + * width = Width in pixels of the region to extract. + * height = Height in pixels of the region to extract. + * xOffset = Horizontal ordinate of left-most coordinate + * of region to extract. + * yOffset = Vertical ordinate of top-most coordinate of + * region to extract. + * map = This character string can be any combination + * or order of R = red, G = green, B = blue, A = alpha, + * C = cyan, Y = yellow, M = magenta, and K = black. + * The ordering reflects the order of the pixels in + * the supplied pixel array. + * + * Returns: An array of values contain the pixel components as + * defined by the map parameter and the Type. + */ + T[] exportPixels(T)(size_t width, size_t height, ssize_t xOffset = 0, ssize_t yOffset = 0, string map = "RGBA") const + { + StorageType storage; + void[] pixels = new T[width*height]; + ExceptionInfo* exception = AcquireExceptionInfo(); + + static if ( is( T == byte) ) + { + storage = CharPixel; + } + else static if ( is( T == short) ) + { + storage = ShortPixel; + } + else static if ( is( T == int) ) + { + storage = IntegerPixel; + } + else static if ( is( T == long) ) + { + storage = LongPixel; + } + else static if ( is( T == float) ) + { + storage = FloatPixel; + } + else static if ( is( T == double) ) + { + storage = DoublePixel; + } + else + { + assert(false, "Unsupported type"); + } + + ExportImagePixels(imageRef, xOffset, yOffset, width, height, map, storage, pixels.ptr); + + DMagickException.throwException(exception); + DestroyExceptionInfo(exception); + + return pixels; + } + + /** * Returns the TypeMetric class witch provides the information * regarding font metrics such as ascent, descent, text width, * text height, and maximum horizontal advance. The units of @@ -422,6 +486,43 @@ class Image imageRef = ImageRef(image); } + ///ditto + void readPixels(T)(size_t width, size_t height, string map, T[] pixels) + { + StorageType storage; + + static if ( is( T == byte) ) + { + storage = CharPixel; + } + else static if ( is( T == short) ) + { + storage = ShortPixel; + } + else static if ( is( T == int) ) + { + storage = IntegerPixel; + } + else static if ( is( T == long) ) + { + storage = LongPixel; + } + else static if ( is( T == float) ) + { + storage = FloatPixel; + } + else static if ( is( T == double) ) + { + storage = DoublePixel; + } + else + { + assert(false, "Unsupported type"); + } + + read(width, height, map, storage, pixels); + } + //TODO: set process monitor. /** @@ -442,6 +543,65 @@ class Image } /** + * Creates a Binary Large OBject, a direct-to-memory + * version of the image. + * + * if an image format is selected which is capable of supporting + * fewer colors than the original image or quantization has been + * requested, the original image will be quantized to fewer colors. + * Use a copy of the original if this is a problem. + * + * Params: + * magick = specifies the image format to write. + * depth = specifies the image depth. + */ + void[] toBlob(string magick = null, size_t depth = 0) + { + size_t length; + ExceptionInfo* exception = AcquireExceptionInfo(); + + AcquireMemoryHandler oldMalloc; + ResizeMemoryHandler oldRealloc; + DestroyMemoryHandler oldFree; + + if ( magick !is null ) + this.magick = magick; + if ( depth != 0 ) + this.depth = depth; + + //Use the D GC to accolate the blob. + GetMagickMemoryMethods(&oldMalloc, &oldRealloc, &oldFree); + SetMagickMemoryMethods(&GC.malloc, &GC.realloc, &GC.free); + + void* blob = ImageToBlob(options.imageInfo, imageRef, &length, exception); + + //Set the memory methods back to the originals. + SetMagickMemoryMethods(oldMalloc, oldRealloc, oldFree); + + DMagickException.throwException(exception); + DestroyExceptionInfo(exception); + + return blob[0 .. length]; + } + + /** + * Writes the image to the specified file. ImageMagick + * determines image format from the prefix or extension. + * + * if an image format is selected which is capable of supporting + * fewer colors than the original image or quantization has been + * requested, the original image will be quantized to fewer colors. + * Use a copy of the original if this is a problem. + */ + void write(string filename) + { + options.filename = filename; + WriteImage(options.imageInfo, imageRef); + + DMagickException.throwException(&(imageRef.exception)); + } + + /** * Set a flag to indicate whether or not to use alpha channel data. */ void alpha(AlphaChannelType type) |