+++ /dev/null
-! Copyright (C) 2007 Doug Coleman.
-! See http://factorcode.org/license.txt for BSD license.
-
-USING: alien arrays byte-arrays combinators summary
-io.backend graphics.viewer io io.binary io.files kernel libc
-math math.functions namespaces opengl opengl.gl prettyprint
-sequences strings ui ui.gadgets.panes io.encodings.binary ;
-IN: graphics.bitmap
-
-! Currently can only handle 24bit bitmaps.
-! Handles row-reversed bitmaps (their height is negative)
-
-TUPLE: bitmap magic size reserved offset header-length width
- height planes bit-count compression size-image
- x-pels y-pels color-used color-important rgb-quads color-index array ;
-
-: raw-bitmap>string ( str n -- str )
- {
- { 32 [ "32bit" throw ] }
- { 24 [ ] }
- { 16 [ "16bit" throw ] }
- { 8 [ "8bit" throw ] }
- { 4 [ "4bit" throw ] }
- { 2 [ "2bit" throw ] }
- { 1 [ "1bit" throw ] }
- } case ;
-
-ERROR: bitmap-magic ;
-
-M: bitmap-magic summary
- drop "First two bytes of bitmap stream must be 'BM'" ;
-
-: parse-file-header ( bitmap -- )
- 2 read >string dup "BM" = [ bitmap-magic ] unless
- over set-bitmap-magic
- 4 read le> over set-bitmap-size
- 4 read le> over set-bitmap-reserved
- 4 read le> swap set-bitmap-offset ;
-
-: parse-bitmap-header ( bitmap -- )
- 4 read le> over set-bitmap-header-length
- 4 read le> over set-bitmap-width
- 4 read le> over set-bitmap-height
- 2 read le> over set-bitmap-planes
- 2 read le> over set-bitmap-bit-count
- 4 read le> over set-bitmap-compression
- 4 read le> over set-bitmap-size-image
- 4 read le> over set-bitmap-x-pels
- 4 read le> over set-bitmap-y-pels
- 4 read le> over set-bitmap-color-used
- 4 read le> swap set-bitmap-color-important ;
-
-: rgb-quads-length ( bitmap -- n )
- [ bitmap-offset 14 - ] keep bitmap-header-length - ;
-
-: color-index-length ( bitmap -- n )
- [ bitmap-width ] keep [ bitmap-planes * ] keep
- [ bitmap-bit-count * 31 + 32 /i 4 * ] keep
- bitmap-height abs * ;
-
-: parse-bitmap ( bitmap -- )
- dup rgb-quads-length read over set-bitmap-rgb-quads
- dup color-index-length read swap set-bitmap-color-index ;
-
-: load-bitmap ( path -- bitmap )
- normalize-path binary [
- T{ bitmap } clone
- dup parse-file-header
- dup parse-bitmap-header
- dup parse-bitmap
- ] with-file-reader
- dup bitmap-color-index over bitmap-bit-count
- raw-bitmap>string >byte-array over set-bitmap-array ;
-
-: save-bitmap ( bitmap path -- )
- binary [
- "BM" write
- dup bitmap-array length 14 + 40 + 4 >le write
- 0 4 >le write
- 54 4 >le write
-
- 40 4 >le write
- dup bitmap-width 4 >le write
- dup bitmap-height 4 >le write
- dup bitmap-planes 1 or 2 >le write
- dup bitmap-bit-count 24 or 2 >le write
- dup bitmap-compression 0 or 4 >le write
- dup bitmap-size-image 4 >le write
- dup bitmap-x-pels 4 >le write
- dup bitmap-y-pels 4 >le write
- dup bitmap-color-used 4 >le write
- dup bitmap-color-important 4 >le write
- dup bitmap-rgb-quads write
- bitmap-color-index write
- ] with-file-writer ;
-
-M: bitmap draw-image ( bitmap -- )
- dup bitmap-height 0 < [
- 0 0 glRasterPos2i
- 1.0 -1.0 glPixelZoom
- ] [
- 0 over bitmap-height abs glRasterPos2i
- 1.0 1.0 glPixelZoom
- ] if
- [ bitmap-width ] keep
- [
- [ bitmap-height abs ] keep
- bitmap-bit-count {
- ! { 32 [ GL_BGRA GL_UNSIGNED_INT_8_8_8_8 ] } ! broken
- { 24 [ GL_BGR GL_UNSIGNED_BYTE ] }
- } case
- ] keep bitmap-array glDrawPixels ;
-
-M: bitmap width ( bitmap -- ) bitmap-width ;
-M: bitmap height ( bitmap -- ) bitmap-height ;
-
-: bitmap. ( path -- )
- load-bitmap <graphics-gadget> gadget. ;
-
-: bitmap-window ( path -- gadget )
- load-bitmap <graphics-gadget> [ "bitmap" open-window ] keep ;
-
-: test-bitmap24 ( -- )
- "resource:extra/graphics/bitmap/test-images/thiswayup24.bmp" bitmap. ;
-
-: test-bitmap8 ( -- )
- "resource:extra/graphics/bitmap/test-images/rgb8bit.bmp" bitmap. ;
-
-: test-bitmap4 ( -- )
- "resource:extra/graphics/bitmap/test-images/rgb4bit.bmp" bitmap. ;
-
-: test-bitmap1 ( -- )
- "resource:extra/graphics/bitmap/test-images/1bit.bmp" bitmap. ;
-