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| /pliant/graphic/image/rotate.pli |
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module "/pliant/language/compiler.pli" | |
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submodule "prototype.pli" | |
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module "/pliant/language/compiler/type/inherit.pli" | |
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module "pixmap.pli" | |
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type ImageRotate | |
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inherit ImagePrototype | |
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field Link:ImagePixmap image | |
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field CBool left right r180 | |
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method r bind image options -> status | |
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arg_rw ImageRotate r ; oarg ImagePrototype image ; arg Str options ; arg ExtendedStatus status | |
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var Float x0 := image x0 | |
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var Float y0 := image y0 | |
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var Float x1 := image x1 | |
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var Float y1 := image y1 | |
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var Int sx := image size_x | |
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var Int sy := image size_y | |
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r left := false ; r right := false ; r r180 := false | |
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if (options option "rotate_left") | |
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r left := true ; swap x0 y0 ; swap x1 y1 ; swap y0 y1 ; swap sx sy | |
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eif (options option "rotate_right") | |
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r right := true ; swap x0 y0 ; swap x1 y1 ; swap x0 x1 ; swap sx sy | |
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eif (options option "rotate_180") | |
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r r180 := true ; swap x0 x1 ; swap y0 y1 | |
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else | |
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return failure:"Unsupported rotation" | |
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addressof:r map ImagePrototype := image_prototype x0 y0 x1 y1 sx sy image:gamut | |
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r image :> addressof:image map ImagePixmap | |
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if (entry_type addressof:image)<>ImagePixmap | |
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return failure:"Only pixmap images can be rotated" | |
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status=success | |
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method r read x0 y0 count adr | |
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arg_rw ImageRotate r ; arg Int x0 y0 count ; arg Address adr | |
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var Int psize := r pixel_size | |
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var Address dest := adr | |
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var Address stop := adr translate Byte count*psize | |
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if r:left | |
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var Int x := r:size_y-1-y0 ; var Int y := x0 | |
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while dest<>stop | |
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memory_copy (r:image pixel x y) dest psize | |
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dest := dest translate Byte psize | |
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y += 1 | |
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eif r:right | |
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var Int x := y0 ; var Int y := r:size_x-1-x0 | |
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while dest<>stop | |
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memory_copy (r:image pixel x y) dest psize | |
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dest := dest translate Byte psize | |
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y -= 1 | |
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eif r:r180 | |
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var Address src := r:image pixel r:size_x-1-x0 r:size_y-1-y0 | |
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while dest<>stop | |
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memory_copy src dest psize | |
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src := src translate Byte -psize | |
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dest := dest translate Byte psize | |
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else | |
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r:image read x0 y0 count adr | |
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export ImageRotate '. bind' | |
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