| Line | Revision | Contents |
| 1 | 1 | #! /usr/bin/env python |
| 2 | '''Test of the ARB window_pos extension... |
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| 3 | ||
| 4 | Requires: |
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| 5 | 308 | PIL |
| 6 | 1 | |
| 7 | ARB.window_pos provides for specifying on-screen |
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| 8 | raster location without needing to carefully specify |
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| 9 | the model-view and perspective matrices. |
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| 10 | ||
| 11 | This module uses the glWindowPos2dARB and glWindowPos2dvARB |
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| 12 | functions, as well as testing for proper operation under |
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| 13 | malformed parameters to the glWindowPos2dvARB function. |
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| 14 | ''' |
|
| 15 | from OpenGLContext import testingcontext |
|
| 16 | 296 | BaseContext = testingcontext.getInteractive() |
| 17 | 1 | from OpenGL.GL import * |
| 18 | 175 | from OpenGL.constants import * |
| 19 | from OpenGL import error |
|
| 20 | 1 | import math, random, traceback, sys |
| 21 | from OpenGLContext.events.timer import Timer |
|
| 22 | ||
| 23 | class TestContext( BaseContext ): |
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| 24 | 308 | def loadImage( self, imageName = 'gldrawpixels.png' ): |
| 25 | """Load an image from a file using PIL. |
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| 26 | This is closer to what you really want to do than the |
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| 27 | original port's crammed-together stuff that set global |
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| 28 | state in the loading method. Note the process of binding |
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| 29 | the texture to an ID then loading the texture into memory. |
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| 30 | This didn't seem clear to me somehow in the tutorial. |
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| 31 | """ |
|
| 32 | 310 | try: |
| 33 | from PIL.Image import open |
|
| 34 | except ImportError, err: |
|
| 35 | from Image import open |
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| 36 | 308 | im = open(imageName) |
| 37 | try: |
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| 38 | ix, iy, image = im.size[0], im.size[1], im.tostring("raw", "RGBA", 0, -1) |
|
| 39 | except SystemError: |
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| 40 | ix, iy, image = im.size[0], im.size[1], im.tostring("raw", "RGBX", 0, -1) |
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| 41 | return ix,iy, image |
|
| 42 | def OnInit( self, ): |
|
| 43 | """Initialisation""" |
|
| 44 | print """You should see two bitmap images traversing the screen |
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| 45 | diagonally. If the GL.ARB.window_pos extension is not available |
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| 46 | then you will exit immediately. |
|
| 47 | """ |
|
| 48 | self.width, self.height, self.data = self.loadImage() |
|
| 49 | global window_pos |
|
| 50 | window_pos = self.extensions.initExtension( "GL.ARB.window_pos") |
|
| 51 | if not window_pos: |
|
| 52 | print 'GL_ARB_window_pos not supported!' |
|
| 53 | sys.exit( testingcontext.REQUIRED_EXTENSION_MISSING ) |
|
| 54 | self.time = Timer( duration = 8.0, repeating = 1 ) |
|
| 55 | self.time.addEventHandler( "fraction", self.OnTimerFraction ) |
|
| 56 | self.time.register (self) |
|
| 57 | self.time.start () |
|
| 58 | self.x = 0 |
|
| 59 | self.y = 0 |
|
| 60 | |
|
| 61 | try: |
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| 62 | window_pos.glWindowPos2dvARB(()) |
|
| 63 | except (error.CopyError,GLerror,ValueError), err: |
|
| 64 | print 'Correct handling of incorrect parameters', err |
|
| 65 | except Exception, err: |
|
| 66 | traceback.print_exc() |
|
| 67 | print 'Incorrect handling of incorrect parameters' |
|
| 68 | try: |
|
| 69 | window_pos.glWindowPos3dvARB(()) |
|
| 70 | except (error.CopyError,GLerror, ValueError), err: |
|
| 71 | print 'Correct handling of incorrect parameters', err |
|
| 72 | except Exception, err: |
|
| 73 | traceback.print_exc() |
|
| 74 | print 'Incorrect handling of incorrect parameters' |
|
| 75 | |
|
| 76 | def OnTimerFraction( self, event ): |
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| 77 | """Set new position...""" |
|
| 78 | width, height = self.getViewPort() |
|
| 79 | self.x = width * event.fraction() |
|
| 80 | self.y = height * event.fraction() |
|
| 81 | ||
| 82 | def Render( self, mode = None): |
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| 83 | BaseContext.Render( self, mode ) |
|
| 84 | # we aren't affected by the matrices (which is the point) |
|
| 85 | glTranslate( 100,0,0 ) |
|
| 86 | if mode.visible and not mode.transparent: |
|
| 87 | format = GL_RGBA |
|
| 88 | type = GL_UNSIGNED_BYTE |
|
| 89 | glEnable(GL_ALPHA_TEST); |
|
| 90 | glAlphaFunc(GL_GREATER,0); |
|
| 91 | glPixelStorei(GL_PACK_ALIGNMENT, 1) |
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| 92 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1) |
|
| 93 | ||
| 94 | width, height = self.getViewPort() |
|
| 95 | window_pos.glWindowPos2dARB(self.x,self.y) |
|
| 96 | ||
| 97 | glDrawPixels( |
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| 98 | self.width, |
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| 99 | self.height, |
|
| 100 | format, |
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| 101 | type, |
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| 102 | self.data, |
|
| 103 | ) |
|
| 104 | window_pos.glWindowPos2fvARB( |
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| 105 | GLfloat_2(self.x,self.getViewPort()[1]-self.y) |
|
| 106 | ) |
|
| 107 | glDrawPixels( |
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| 108 | self.width, |
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| 109 | self.height, |
|
| 110 | format, |
|
| 111 | type, |
|
| 112 | self.data, |
|
| 113 | ) |
|
| 114 | |
|
| 115 | |
|
| 116 | 1 | if __name__ == "__main__": |
| 117 | 308 | TestContext.ContextMainLoop() |
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