81 lines
2.3 KiB
Factor
81 lines
2.3 KiB
Factor
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! Copyright (C) 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors assocs cache colors.constants destructors fry
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kernel opengl opengl.gl combinators images endian
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specialized-arrays.float locals sequences ;
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IN: opengl.textures
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: init-texture ( -- )
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GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER GL_LINEAR glTexParameteri
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GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER GL_LINEAR glTexParameteri
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GL_TEXTURE_2D GL_TEXTURE_WRAP_S GL_REPEAT glTexParameterf
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GL_TEXTURE_2D GL_TEXTURE_WRAP_T GL_REPEAT glTexParameterf ;
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: rect-texture-coords ( -- )
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float-array{ 0 0 1 0 1 1 0 1 } gl-texture-coord-pointer ;
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: gen-texture ( -- id )
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[ glGenTextures ] (gen-gl-object) ;
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:: make-texture ( dim pixmap format type -- id )
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gen-texture [
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GL_TEXTURE_BIT [
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GL_TEXTURE_2D swap glBindTexture
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GL_TEXTURE_2D
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0
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GL_RGBA
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dim first2
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0
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format
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type
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pixmap
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glTexImage2D
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] do-attribs
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] keep ;
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: draw-textured-rect ( dim texture -- )
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GL_TEXTURE_2D [
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GL_TEXTURE_BIT [
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GL_TEXTURE_COORD_ARRAY [
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COLOR: white gl-color
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GL_TEXTURE_2D swap glBindTexture
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init-texture rect-texture-coords
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fill-rect-vertices (gl-fill-rect)
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GL_TEXTURE_2D 0 glBindTexture
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] do-enabled-client-state
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] do-attribs
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] do-enabled ;
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: delete-texture ( id -- )
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[ glDeleteTextures ] (delete-gl-object) ;
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TUPLE: texture texture display-list disposed ;
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: make-texture-display-list ( dim texture -- dlist )
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GL_COMPILE [ draw-textured-rect ] make-dlist ;
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GENERIC: component-order>format ( component-order -- format )
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M: RGBA component-order>format drop GL_RGBA ;
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M: BGRA component-order>format drop GL_BGRA_EXT ;
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: byte-order>type ( byte-order -- format )
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native-endianness eq?
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GL_UNSIGNED_INT_8_8_8_8_REV
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GL_UNSIGNED_BYTE
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? ;
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: <texture> ( image -- texture )
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[
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{
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[ dim>> ]
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[ bitmap>> ]
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[ component-order>> component-order>format ]
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[ byte-order>> byte-order>type ]
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} cleave make-texture
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] [ dim>> ] bi
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over make-texture-display-list f texture boa ;
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M: texture dispose*
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[ texture>> delete-texture ]
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[ display-list>> delete-dlist ] bi ;
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