#
# Copyright (C) 2007 Jan Dvorak <jan.dvorak@kraxnet.cz>
#
# This program is distributed under the terms of the MIT license.
# See the included MIT-LICENSE file for the terms of this license.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#

require 'test/unit'

class Test_10_11 < Test::Unit::TestCase
	def setup
		common_setup()
	end

	def teardown
		common_teardown()
	end

	def test_glhint
		glHint(GL_FOG_HINT,GL_NICEST)
		assert_equal(glGetIntegerv(GL_FOG_HINT), GL_NICEST)
		glHint(GL_FOG_HINT,GL_FASTEST)
		assert_equal(glGetIntegerv(GL_FOG_HINT), GL_FASTEST)
	end

	def test_glindex
		glIndexd(2.0)
		assert_in_delta(glGetDoublev(GL_CURRENT_INDEX),2.0,0.001)
		glIndexdv([3.0])
		assert_in_delta(glGetDoublev(GL_CURRENT_INDEX),3.0,0.001)

		glIndexf(4.0)
		assert_in_delta(glGetFloatv(GL_CURRENT_INDEX),4.0,0.001)
		glIndexfv([5.0])
		assert_in_delta(glGetFloatv(GL_CURRENT_INDEX),5.0,0.001)

		glIndexi(6)
		assert_in_delta(glGetIntegerv(GL_CURRENT_INDEX),6,0.001)
		glIndexiv([7])
		assert_in_delta(glGetIntegerv(GL_CURRENT_INDEX),7,0.001)

		glIndexs(8)
		assert_in_delta(glGetIntegerv(GL_CURRENT_INDEX),8,0.001)
		glIndexsv([9])
		assert_in_delta(glGetIntegerv(GL_CURRENT_INDEX),9,0.001)

		glIndexub(10)
		assert_in_delta(glGetIntegerv(GL_CURRENT_INDEX),10,0.001)
		glIndexubv([11])
		assert_in_delta(glGetIntegerv(GL_CURRENT_INDEX),11,0.001)

		# index pointer
		glIndexPointer(GL_INT,2,"")
		assert_equal(glGetIntegerv(GL_INDEX_ARRAY_STRIDE),2)
		assert_equal(glGetIntegerv(GL_INDEX_ARRAY_TYPE),GL_INT)
	end

	def test_glclear
		glClearColor(1,0,1,0)
		assert_equal(glGetDoublev(GL_COLOR_CLEAR_VALUE),[1,0,1,0])

		glClearIndex(2)
		assert_equal(glGetDoublev(GL_INDEX_CLEAR_VALUE),2)

		glClearAccum(0.5,0.5,0.5,0.5)
		assert_equal(glGetDoublev(GL_ACCUM_CLEAR_VALUE),[0.5,0.5,0.5,0.5])

		glClearStencil(1)
		assert_equal(glGetIntegerv(GL_STENCIL_CLEAR_VALUE),1)

		glClearDepth(0.5)
		assert_equal(glGetDoublev(GL_DEPTH_CLEAR_VALUE),0.5)
	end
	
	def test_glclientattrib
		glPixelStorei(GL_PACK_ALIGNMENT,2)
		glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT)
		glPixelStorei(GL_PACK_ALIGNMENT,4)
		assert_equal(glGetIntegerv(GL_PACK_ALIGNMENT),4)
		glPopClientAttrib()
		assert_equal(glGetIntegerv(GL_PACK_ALIGNMENT),2)
	end

	def test_matrix
		m_a = [[2.0,0.0,0.0,0.0],
					 [0.0,2.0,0.0,0.0],
					 [0.0,0.0,2.0,0.0],
					 [0.0,0.0,0.0,2.0]]

		m_b = [[3.0,0.0,0.0,0.0],
					 [0.0,3.0,0.0,0.0],
					 [0.0,0.0,3.0,0.0],
					 [0.0,0.0,0.0,3.0]]

		m_ident = [[1.0,0.0,0.0,0.0],
							 [0.0,1.0,0.0,0.0],
							 [0.0,0.0,1.0,0.0],
							 [0.0,0.0,0.0,1.0]]
				
		# 1	 
		glMatrixMode(GL_MODELVIEW)
		glLoadMatrixf(m_a)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m_a)
		glLoadMatrixd(m_b)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m_b)

		glLoadIdentity()
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m_ident)

		glMultMatrixf(m_a)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m_a)
		glLoadIdentity()
		glMultMatrixd(m_b)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m_b)

		# 2
		glMatrixMode(GL_MODELVIEW)
		glLoadMatrixf(m_a)
		glMatrixMode(GL_PROJECTION)
		glLoadMatrixf(m_b)

		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m_a)
		assert_equal(glGetDoublev(GL_PROJECTION_MATRIX), m_b)
		
		glMatrixMode(GL_MODELVIEW)
		glLoadMatrixf(m_a)
		glPushMatrix()
		glLoadMatrixf(m_b)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m_b)
		glPopMatrix()
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m_a)
	
		# 3
		m = Matrix.rows([[1,2,3,4],[5,6,7,8],[9,10,11,12],[13,14,15,16]])
		glMatrixMode(GL_MODELVIEW)
		glLoadMatrixf(m)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m.to_a)
		glLoadIdentity()
		glLoadMatrixd(m)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m.to_a)
		glLoadIdentity()
		glMultMatrixf(m)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m.to_a)
		glLoadIdentity()
		glMultMatrixd(m)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX), m.to_a)

		assert_raise ArgumentError do glLoadMatrixf([1,2,3,4]) end
		assert_raise ArgumentError do glLoadMatrixd([1,2,3,4]) end
		assert_raise ArgumentError do glMultMatrixf([1,2,3,4]) end
		assert_raise ArgumentError do glMultMatrixd([1,2,3,4]) end
	end

	def test_gledge
		glEdgeFlag(GL_FALSE)
		assert_equal(glGetBooleanv(GL_EDGE_FLAG),false)
		glEdgeFlag(GL_TRUE)
		assert_equal(glGetBooleanv(GL_EDGE_FLAG),true)
		glEdgeFlagv([GL_FALSE])
		assert_equal(glGetBooleanv(GL_EDGE_FLAG),false)
	end

	def test_clientstate
		glEnableClientState(GL_COLOR_ARRAY)
		assert_equal(glIsEnabled(GL_COLOR_ARRAY),true)
		glDisableClientState(GL_COLOR_ARRAY)
		assert_equal(glIsEnabled(GL_COLOR_ARRAY),false)
	end

	def test_glshademodel
		glShadeModel(GL_FLAT)
		assert_equal(glGetIntegerv(GL_SHADE_MODEL),GL_FLAT)
		glShadeModel(GL_SMOOTH)
		assert_equal(glGetIntegerv(GL_SHADE_MODEL),GL_SMOOTH)
	end

	def test_glclipplane
		glClipPlane(GL_CLIP_PLANE0,[1,2,3,4])
		assert_equal(glGetClipPlane(GL_CLIP_PLANE0),[1,2,3,4])
	end

	def test_polygonoffset
		glPolygonOffset(2.0,3.0)
		assert_equal(glGetDoublev(GL_POLYGON_OFFSET_FACTOR),2.0)
		assert_equal(glGetDoublev(GL_POLYGON_OFFSET_UNITS),3.0)
	end

	def test_glviewport
		glViewport(1,2,3,4)
		assert_equal(glGetIntegerv(GL_VIEWPORT), [1,2,3,4])
	end

	def test_mask
		glStencilMask(2)
		assert_equal(glGetIntegerv(GL_STENCIL_WRITEMASK), 2)
		glStencilMask(1)
		assert_equal(glGetIntegerv(GL_STENCIL_BACK_WRITEMASK), 1)

		glColorMask(GL_TRUE,GL_FALSE,GL_TRUE,GL_FALSE)
		assert_equal(glGetBooleanv(GL_COLOR_WRITEMASK),[true,false,true,false])

		glDepthMask(GL_TRUE)
		assert_equal(glGetBooleanv(GL_DEPTH_WRITEMASK),true)
		glDepthMask(GL_FALSE)
		assert_equal(glGetBooleanv(GL_DEPTH_WRITEMASK),false)

		glIndexMask(2)
		assert_equal(glGetIntegerv(GL_INDEX_WRITEMASK), 2)
		glIndexMask(1)
		assert_equal(glGetIntegerv(GL_INDEX_WRITEMASK), 1)
	end

	def test_glflush
		begin
			glBegin(GL_POINTS)
			glFlush()
			glEnd
		rescue Gl::Error => err
			assert(err.id == GL_INVALID_OPERATION)
		end	
	end

	def test_glfinish
		begin
			glBegin(GL_POINTS)
			glFinish()
			glEnd
		rescue Gl::Error => err
			assert(err.id == GL_INVALID_OPERATION)
		end	
	end

	def test_glgetstring
		assert(glGetString(GL_VERSION).size > 0)
	end

	def test_glscissor
		glScissor(1,2,3,4)
		assert_equal(glGetIntegerv(GL_SCISSOR_BOX),[1,2,3,4])
	end

	def test_glstencilfunc
		glStencilFunc(GL_LEQUAL,2,3)
		assert_equal(glGetIntegerv(GL_STENCIL_FUNC),GL_LEQUAL)
		assert_equal(glGetIntegerv(GL_STENCIL_REF),2)
		assert_equal(glGetIntegerv(GL_STENCIL_VALUE_MASK),3)
	end

	def test_glstencilop
		glStencilOp(GL_ZERO,GL_REPLACE,GL_INCR)
		assert_equal(glGetIntegerv(GL_STENCIL_FAIL),GL_ZERO)
		assert_equal(glGetIntegerv(GL_STENCIL_PASS_DEPTH_FAIL),GL_REPLACE)
		assert_equal(glGetIntegerv(GL_STENCIL_PASS_DEPTH_PASS),GL_INCR)
	end

	def test_gllogicop
		glLogicOp(GL_NAND)
		assert_equal(glGetIntegerv(GL_LOGIC_OP_MODE),GL_NAND)
	end

	def test_glfrustum
		glMatrixMode(GL_PROJECTION)
		glLoadIdentity()
		
		glFrustum(1,2,3,4,5,6)
		assert_equal(glGetDoublev(GL_PROJECTION_MATRIX),[[10.0, 0.0, 0.0, 0.0], [0.0, 10.0, 0.0, 0.0], [3.0, 7.0, -11.0, -1.0], [0.0, 0.0, -60.0, 0.0]])
	end

	def test_gldepthrange
		glDepthRange(0.5,0.5)
		assert_equal(glGetDoublev(GL_DEPTH_RANGE),[0.5,0.5])
	end

	def test_func
		glAlphaFunc(GL_GREATER,0.5)
		assert_equal(glGetIntegerv(GL_ALPHA_TEST_FUNC),GL_GREATER)
		assert_equal(glGetDoublev(GL_ALPHA_TEST_REF),0.5)

		glBlendFunc(GL_CONSTANT_ALPHA, GL_ONE_MINUS_DST_COLOR)
		assert_equal(glGetIntegerv(GL_BLEND_SRC),GL_CONSTANT_ALPHA)
		assert_equal(glGetIntegerv(GL_BLEND_DST),GL_ONE_MINUS_DST_COLOR)

		glDepthFunc(GL_LEQUAL)
		assert_equal(glGetIntegerv(GL_DEPTH_FUNC),GL_LEQUAL)
	end

	def test_glpixelzoom
		glPixelZoom(0.5,0.5)
		assert_equal(glGetDoublev(GL_ZOOM_X),0.5)
		assert_equal(glGetDoublev(GL_ZOOM_Y),0.5)
	end

	def test_glpixelstore
		glPixelStoref(GL_PACK_IMAGE_HEIGHT,5)
		assert_equal(glGetIntegerv(GL_PACK_IMAGE_HEIGHT),5)
		glPixelStorei(GL_PACK_IMAGE_HEIGHT,6)
		assert_equal(glGetIntegerv(GL_PACK_IMAGE_HEIGHT),6)
	end

	def test_glpixeltransfer
		glPixelTransferf(GL_RED_SCALE,2)
		assert_equal(glGetIntegerv(GL_RED_SCALE),2)
		glPixelTransferi(GL_RED_SCALE,3)
		assert_equal(glGetIntegerv(GL_RED_SCALE),3)
	end

	def test_pixelmap
		glPixelMapfv(GL_PIXEL_MAP_I_TO_I,[1,2,3,4])
		assert_equal(glGetPixelMapfv(GL_PIXEL_MAP_I_TO_I), [1,2,3,4])

		glPixelMapuiv(GL_PIXEL_MAP_I_TO_I,[5,6,7,8])
		assert_equal(glGetPixelMapuiv(GL_PIXEL_MAP_I_TO_I),[5,6,7,8])

		glPixelMapusv(GL_PIXEL_MAP_I_TO_I,[9,10,11,12])
		assert_equal(glGetPixelMapusv(GL_PIXEL_MAP_I_TO_I),[9,10,11,12])
	end

	def test_buffers
		glDrawBuffer(GL_FRONT)
		assert_equal(glGetIntegerv(GL_DRAW_BUFFER),GL_FRONT)
		glDrawBuffer(GL_BACK)
		assert_equal(glGetIntegerv(GL_DRAW_BUFFER),GL_BACK)

		glReadBuffer(GL_FRONT)
		assert_equal(glGetIntegerv(GL_READ_BUFFER),GL_FRONT)
		glReadBuffer(GL_BACK)
		assert_equal(glGetIntegerv(GL_READ_BUFFER),GL_BACK)
	end

	def test__selection_buffer
		buf = glSelectBuffer(32)

		glRenderMode(GL_SELECT)
		glInitNames()
		glPushName(6)
		glPushName(3)
		glLoadName(5)
		glPopName()

		glBegin(GL_QUADS)
		glVertex2i(-1,-1)
		glVertex2i( 1,-1)
		glVertex2i( 1, 1)
		glVertex2i(-1, 1)
		glEnd()
		
		count = glRenderMode(GL_RENDER)
		data = buf.unpack("i*")
		assert(count==1) # number of records
		assert(data[0]==1) # number of hits in this record
#		assert(data[1]>0) # zbuffer near
#		assert(data[2]>0) # zbuffer far
		assert(data[3]==6) # name of hit
	end

	def test__feedback_buffer
		buf = glFeedbackBuffer(32,GL_2D)
		
		glRenderMode(GL_FEEDBACK)

		glBegin(GL_TRIANGLES)
		glVertex2i(-1,-1)
		glVertex2i( 1,-1)
		glVertex2i( 1, 1)
		glEnd()
	
		glPassThrough(2.0)
		
		count = glRenderMode(GL_RENDER)
		data = buf.unpack("f*")
		assert_equal(count,10) # (1 + 1 + 3x2) + (1 + 1)
		assert_equal(data[0],GL_POLYGON_TOKEN)
		assert_equal(data[1],3) # 3 vertices
		# skip rasterized vertex data
		assert_equal(data[8],GL_PASS_THROUGH_TOKEN)
		assert_equal(data[9],2.0)
	end

	def test_glrasterpos
		glOrtho(0,$window_size,0,$window_size,0,-1)

		# 2		
		glRasterPos2d(1.0,2.0)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,0.0,1.0])
		glRasterPos2dv([3.0,4.0])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		glRasterPos2f(1.0,2.0)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,0.0,1.0])
		glRasterPos2fv([3.0,4.0])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		glRasterPos2i(1,2)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,0.0,1.0])
		glRasterPos2iv([3,4])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		glRasterPos2s(1,2)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,0.0,1.0])
		glRasterPos2sv([3,4])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		# 3
		glRasterPos3d(1.0,2.0,1.0)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,1.0,1.0])
		glRasterPos3dv([3.0,4.0,0.0])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		glRasterPos3f(1.0,2.0,1.0)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,1.0,1.0])
		glRasterPos3fv([3.0,4.0,0.0])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		glRasterPos3i(1,2,1)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,1.0,1.0])
		glRasterPos3iv([3,4,0])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		glRasterPos3s(1,2,1)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,1.0,1.0])
		glRasterPos3sv([3,4,0])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		# 4
		glRasterPos4d(1.0,2.0,1.0,1.0)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,1.0,1.0])
		glRasterPos4dv([3.0,4.0,0.0,1.0])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		glRasterPos4f(1.0,2.0,1.0,1.0)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,1.0,1.0])
		glRasterPos4fv([3.0,4.0,0.0,1.0])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		glRasterPos4i(1,2,1,1)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,1.0,1.0])
		glRasterPos4iv([3,4,0,1])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])

		glRasterPos4s(1,2,1,1)
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[1.0,2.0,1.0,1.0])
		glRasterPos4sv([3,4,0,1])
		assert_equal(glGetDoublev(GL_CURRENT_RASTER_POSITION),[3.0,4.0,0.0,1.0])
	end

	def test_glbitmap
		glOrtho(0,$window_size,0,$window_size,0,-1)

		bitmap = [ 0x55 ] * 8 # 64 bits (8x8 bitmap), stipple pattern

		glPixelStorei(GL_PACK_ALIGNMENT,1)
		glPixelStorei(GL_UNPACK_ALIGNMENT,1)

		glBitmap(8,8,0,0,0,0,bitmap.pack("c*"))
		data = glReadPixels(0,0,8,8,GL_RED,GL_UNSIGNED_BYTE)
		assert_equal(data.unpack("C*"),[0,255] * 32)
	end

	def test_glfog
		glFogfv(GL_FOG_COLOR,[0.0,1.0,0.0,1.0])
		assert_equal(glGetDoublev(GL_FOG_COLOR),[0.0,1.0,0.0,1.0])
		glFogf(GL_FOG_DENSITY,0.5)
		assert_equal(glGetDoublev(GL_FOG_DENSITY),0.5)
		glFogi(GL_FOG_MODE,GL_LINEAR)
		assert_equal(glGetIntegerv(GL_FOG_MODE),GL_LINEAR)
		glFogi(GL_FOG_MODE,GL_EXP)
		assert_equal(glGetIntegerv(GL_FOG_MODE),GL_EXP)
		glFogiv(GL_FOG_MODE,[GL_EXP2])
		assert_equal(glGetIntegerv(GL_FOG_MODE),GL_EXP2)
	end

	def test_glcolor
		# 3
		glColor3b(2**7-1,0,2**7-1)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,1.0]))
		glColor3bv([0,2**7-1,0])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor3d(1.0,0.0,1.0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,1.0]))
		glColor3dv([0.0,1.0,0.0])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor3f(1.0,0.0,1.0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,1.0]))
		glColor3fv([0.0,1.0,0.0])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor3i(2**31-1,0,2**31-1)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,1.0]))
		glColor3iv([0,2**31-1,0])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor3s(2**15-1,0,2**15-1)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,1.0]))
		glColor3sv([0,2**15-1,0])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor3ub(2**8-1,0,2**8-1)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,1.0]))
		glColor3ubv([0,2**8-1,0])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor3ui(2**32-1,0,2**32-1)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,1.0]))
		glColor3uiv([0,2**32-1,0])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor3us(2**16-1,0,2**16-1)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,1.0]))
		glColor3usv([0,2**16-1,0])
		# 4
		glColor4b(2**7-1,0,2**7-1,0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,0.0]))
		glColor4bv([0,2**7-1,0,2**7-1])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor4d(1.0,0.0,1.0,0.0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,0.0]))
		glColor4dv([0.0,1.0,0.0,1.0])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor4f(1.0,0.0,1.0,0.0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,0.0]))
		glColor4fv([0.0,1.0,0.0,1.0])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor4i(2**31-1,0,2**31-1,0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,0.0]))
		glColor4iv([0,2**31-1,0,2**31-1])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor4s(2**15-1,0,2**15-1,0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,0.0]))
		glColor4sv([0,2**15-1,0,2**15-1])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor4ub(2**8-1,0,2**8-1,0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,0.0]))
		glColor4ubv([0,2**8-1,0,2**8-1])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor4ui(2**32-1,0,2**32-1,0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,0.0]))
		glColor4uiv([0,2**32-1,0,2**32-1])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
		glColor4us(2**16-1,0,2**16-1,0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[1.0,0.0,1.0,0.0]))
		glColor4usv([0,2**16-1,0,2**16-1])
		assert(approx_equal(glGetDoublev(GL_CURRENT_COLOR),[0.0,1.0,0.0,1.0]))
	end

	def test_glortho
		res = [ [2.0/$window_size, 0, 0, 0],
					  [0, 2.0/$window_size, 0, 0],
					  [0, 0, 2, 0],
						[-1,-1,-1,1] ]

		glMatrixMode(GL_PROJECTION)
		glLoadIdentity()
		glOrtho(0,$window_size,0,$window_size,0,-1)
		assert_equal(glGetDoublev(GL_PROJECTION_MATRIX),res)
	end

	def test_glnormal
		glNormal3d(1.0,2.0,3.0)
		assert_equal(glGetDoublev(GL_CURRENT_NORMAL),[1.0,2.0,3.0])
		glNormal3dv([4.0,5.0,6.0])
		assert_equal(glGetDoublev(GL_CURRENT_NORMAL),[4.0,5.0,6.0])

		glNormal3f(1.0,2.0,3.0)
		assert_equal(glGetDoublev(GL_CURRENT_NORMAL),[1.0,2.0,3.0])
		glNormal3fv([4.0,5.0,6.0])
		assert_equal(glGetDoublev(GL_CURRENT_NORMAL),[4.0,5.0,6.0])

		glNormal3i(1,2,3)
		assert_equal(glGetIntegerv(GL_CURRENT_NORMAL),[1,2,3])
		glNormal3iv([4,5,6])
		assert_equal(glGetIntegerv(GL_CURRENT_NORMAL),[4,5,6])

		glNormal3b(2**7-1,0,2**7-1)
		assert(approx_equal(glGetDoublev(GL_CURRENT_NORMAL),[1.0,0.0,1.0]))
		glNormal3bv(0,2**7-1,0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_NORMAL),[0.0,1.0,0.0]))

		glNormal3s(2**15-1,0,2**15-1)
		assert(approx_equal(glGetDoublev(GL_CURRENT_NORMAL),[1.0,0.0,1.0]))
		glNormal3sv(0,2**15-1,0)
		assert(approx_equal(glGetDoublev(GL_CURRENT_NORMAL),[0.0,1.0,0.0]))
	end


	def test_gllight
		glLightf(GL_LIGHT0,GL_SPOT_CUTOFF,80.0)
		assert_equal(glGetLightfv(GL_LIGHT0,GL_SPOT_CUTOFF),80.0)
		glLighti(GL_LIGHT0,GL_SPOT_CUTOFF,75)
		assert_equal(glGetLightiv(GL_LIGHT0,GL_SPOT_CUTOFF),75)
		glLightfv(GL_LIGHT0,GL_AMBIENT,[0.5,0.5,0.5,1.0])
		assert_equal(glGetLightfv(GL_LIGHT0,GL_AMBIENT), [0.5,0.5,0.5,1.0])
		glLightiv(GL_LIGHT0,GL_CONSTANT_ATTENUATION,[32])
		assert_equal(glGetLightiv(GL_LIGHT0,GL_CONSTANT_ATTENUATION),32)
	end

	def test_glmaterial
		glMaterialfv(GL_FRONT,GL_AMBIENT,[0.0,1.0,0.0,1.0])
		assert_equal(glGetMaterialfv(GL_FRONT,GL_AMBIENT),[0.0,1.0,0.0,1.0])

		glMaterialiv(GL_FRONT,GL_SHININESS,[50])
		assert_equal(glGetMaterialiv(GL_FRONT,GL_SHININESS),50)

		glMaterialf(GL_FRONT,GL_SHININESS,49.0)
		assert_equal(glGetMaterialfv(GL_FRONT,GL_SHININESS),49.0)

		glMateriali(GL_FRONT,GL_SHININESS,48)
		assert_equal(glGetMaterialiv(GL_FRONT,GL_SHININESS),48)
	
	end

	def test_glcolormaterial
		glColorMaterial(GL_FRONT,GL_EMISSION)
		assert_equal(glGetIntegerv(GL_COLOR_MATERIAL_FACE),GL_FRONT)
		assert_equal(glGetIntegerv(GL_COLOR_MATERIAL_PARAMETER),GL_EMISSION)

		glColorMaterial(GL_BACK,GL_SPECULAR)
		assert_equal(glGetIntegerv(GL_COLOR_MATERIAL_FACE),GL_BACK)
		assert_equal(glGetIntegerv(GL_COLOR_MATERIAL_PARAMETER),GL_SPECULAR)
	end

	def test_gllightmodel
		glLightModeli(GL_LIGHT_MODEL_TWO_SIDE,GL_TRUE)
		assert_equal(glGetBooleanv(GL_LIGHT_MODEL_TWO_SIDE),GL_TRUE)
		glLightModelf(GL_LIGHT_MODEL_TWO_SIDE,GL_FALSE)
		assert_equal(glGetBooleanv(GL_LIGHT_MODEL_TWO_SIDE),GL_FALSE)

		glLightModelfv(GL_LIGHT_MODEL_AMBIENT,[0.5,0.5,0.5,1.0])
		assert_equal(glGetDoublev(GL_LIGHT_MODEL_AMBIENT),[0.5,0.5,0.5,1.0])
		glLightModeliv(GL_LIGHT_MODEL_AMBIENT,[1,0,1,0])
		assert_equal(glGetIntegerv(GL_LIGHT_MODEL_AMBIENT),[1,0,1,0])
	end

	def test_gltexcoord
		# 1
		glTexCoord1d(1.5)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1.5,0,0,1])
		glTexCoord1dv([0.5])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0.5,0,0,1])
		glTexCoord1f(1.5)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1.5,0,0,1])
		glTexCoord1fv([0.5])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0.5,0,0,1])
		glTexCoord1i(1)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1,0,0,1])
		glTexCoord1iv([0])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0,0,0,1])
		glTexCoord1s(1)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1,0,0,1])
		glTexCoord1sv([0])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0,0,0,1])
		# 2
		glTexCoord2d(1.5,1.5)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1.5,1.5,0,1])
		glTexCoord2dv([0.5,0.5])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0.5,0.5,0,1])
		glTexCoord2f(1.5,1.5)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1.5,1.5,0,1])
		glTexCoord2fv([0.5,0.5])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0.5,0.5,0,1])
		glTexCoord2i(1,1)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1,1,0,1])
		glTexCoord2iv([0,0])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0,0,0,1])
		glTexCoord2s(1,1)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1,1,0,1])
		glTexCoord2sv([0,0])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0,0,0,1])
		# 3
		glTexCoord3d(1.5,1.5,1.5)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1.5,1.5,1.5,1])
		glTexCoord3dv([0.5,0.5,0.5])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0.5,0.5,0.5,1])
		glTexCoord3f(1.5,1.5,1.5)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1.5,1.5,1.5,1])
		glTexCoord3fv([0.5,0.5,0.5])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0.5,0.5,0.5,1])
		glTexCoord3i(1,1,1)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1,1,1,1])
		glTexCoord3iv([0,0,0])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0,0,0,1])
		glTexCoord3s(1,1,1)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1,1,1,1])
		glTexCoord3sv([0,0,0])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0,0,0,1])
		# 4
		glTexCoord4d(1.5,1.5,1.5,1.5)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1.5,1.5,1.5,1.5])
		glTexCoord4dv([0.5,0.5,0.5,0.5])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0.5,0.5,0.5,0.5])
		glTexCoord4f(1.5,1.5,1.5,1.5)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1.5,1.5,1.5,1.5])
		glTexCoord4fv([0.5,0.5,0.5,0.5])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0.5,0.5,0.5,0.5])
		glTexCoord4i(1,1,1,1)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1,1,1,1])
		glTexCoord4iv([0,0,0,0])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0,0,0,0])
		glTexCoord4s(1,1,1,1)
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1,1,1,1])
		glTexCoord4sv([0,0,0,0])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[0,0,0,0])
	end

	def test_glenable_disable
		glEnable(GL_FOG)
		assert_equal(glIsEnabled(GL_FOG),true)
		glDisable(GL_FOG)
		assert_equal(glIsEnabled(GL_FOG),false)
	end

	def test_gltexparameter
		glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP)
		assert_equal(glGetTexParameteriv(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S),GL_CLAMP)
		glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_MIRRORED_REPEAT)
		assert_equal(glGetTexParameterfv(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S),GL_MIRRORED_REPEAT)
		glTexParameteriv(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,[GL_CLAMP])
		assert_equal(glGetTexParameteriv(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S),GL_CLAMP)
		glTexParameterfv(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,[GL_MIRRORED_REPEAT])
		assert_equal(glGetTexParameterfv(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S),GL_MIRRORED_REPEAT)

		assert_equal(glGetTexLevelParameterfv(GL_TEXTURE_2D,0,GL_TEXTURE_WIDTH),0.0)
		assert_equal(glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_WIDTH),0)
	end

	def test_glcullface
		glCullFace(GL_FRONT)
		assert_equal(glGetIntegerv(GL_CULL_FACE_MODE),GL_FRONT)
		glCullFace(GL_BACK)
		assert_equal(glGetIntegerv(GL_CULL_FACE_MODE),GL_BACK)
	end
	
	def test_glfrontface
		glFrontFace(GL_CW)
		assert_equal(glGetIntegerv(GL_FRONT_FACE),GL_CW)
		glFrontFace(GL_CCW)
		assert_equal(glGetIntegerv(GL_FRONT_FACE),GL_CCW)
	end

	def test_glpointsize
		glPointSize(2.0)
		assert_equal(glGetDoublev(GL_POINT_SIZE),2.0)
		glPointSize(3.0)
		assert_equal(glGetDoublev(GL_POINT_SIZE),3.0)
	end

	def test_glpolygonmode
		glPolygonMode(GL_FRONT_AND_BACK,GL_LINE)
		assert_equal(glGetIntegerv(GL_POLYGON_MODE),[GL_LINE,GL_LINE])
		glPolygonMode(GL_FRONT_AND_BACK,GL_FILL)
		assert_equal(glGetIntegerv(GL_POLYGON_MODE),[GL_FILL,GL_FILL])
	end

	def test_gllinewidth
		glLineWidth(2.0)
		assert_equal(glGetDoublev(GL_LINE_WIDTH),2.0)
		glLineWidth(3.0)
		assert_equal(glGetDoublev(GL_LINE_WIDTH),3.0)
	end
	
	def test_gllinestipple
		glLineStipple(3,0x1234)
		assert_equal(glGetIntegerv(GL_LINE_STIPPLE_REPEAT),3)
		assert_equal(glGetIntegerv(GL_LINE_STIPPLE_PATTERN),0x1234)
	end

	def test_glpolygonstipple
		stipple = [0x12] * 128
		glPolygonStipple(stipple.pack("c*"))
		assert_equal(glGetPolygonStipple(),stipple.pack("c*"))
	end

	def parse_feedback_data(data,count)
		c = count / 11
		ret = []
		(0...c).each do |x|
			i = x *11
			type = data[0+i]
		
			v1 = [data[2+i], data[3+i], data[4+i]]
			v2 = [data[5+i], data[6+i], data[7+i]]
			v3 = [data[8+i], data[9+i], data[10+i]]
			vertex = [v1,v2,v3].sort
			ret << [type,vertex]
		end
		ret
	end

	def test_glvertex
		glMatrixMode(GL_PROJECTION)
		glOrtho(0,$window_size,0,$window_size,0,-1)

		buf = glFeedbackBuffer(256,GL_3D)

		glRenderMode(GL_FEEDBACK)

		glBegin(GL_TRIANGLES)
		glVertex2d( 1, 0)
		glVertex2dv([0,0])
		glVertex2f( 1,1)

		glVertex2fv([ 1, 0])
		glVertex2i(  0,0)
		glVertex2iv([1,1])

		glVertex2s( 1, 0)
		glVertex2sv([0,0])
		glVertex3d( 1,1,0)

		glVertex3dv([ 1, 0,0])
		glVertex3f(  0,0,0)
		glVertex3fv([1,1,0])

		glVertex3i( 1, 0,0)
		glVertex3iv([0,0,0])
		glVertex3s( 1,1,0)

		glVertex3sv([ 1, 0,0])
		glVertex4d(  0,0,0,1)
		glVertex4dv([1,1,0,1])

		glVertex4f( 1, 0,0,1)
		glVertex4fv([0,0,0,1])
		glVertex4i( 1,1,0,1)

		glVertex4iv([ 1, 0,0,1])
		glVertex4s(  0,0,0,1)
		glVertex4sv([1,1,0,1])

		glEnd()

		count = glRenderMode(GL_RENDER)
		data = buf.unpack("f*")
		
		ref = [[GL_POLYGON_TOKEN,[[0,0,0],[1,0,0],[1,1,0]]]] * 8
		
		assert_equal(parse_feedback_data(data,count),ref)
	end
	
	def test_glrect
		glMatrixMode(GL_PROJECTION)
		glOrtho(0,$window_size,0,$window_size,0,-1)
		
		buf = glFeedbackBuffer(256,GL_3D)
		
		glRenderMode(GL_FEEDBACK)

		glRectd(0,0,1,1)
		glRectdv([0,0],[1,1])
		glRectf(0,0,1,1)
		glRectfv([0,0],[1,1])
		glRecti(0,0,1,1)
		glRectiv([0,0],[1,1])
		glRects(0,0,1,1)
		glRectsv([0,0],[1,1])
		
		count = glRenderMode(GL_RENDER)
		data = buf.unpack("f*")

		assert_equal(count, (3*3+2)*2*8)
	end

	def test_glclear
		glClearColor(1.0,1.0,1.0,1.0)
		glClear(GL_COLOR_BUFFER_BIT)

		data = glReadPixels(0,0,1,1,GL_RGB,GL_FLOAT)
		assert_equal(data.unpack("f*"),[1.0,1.0,1.0])

		glClearColor(0.0,0.0,0.0,0.0)
		glClear(GL_COLOR_BUFFER_BIT)

		data = glReadPixels(0,0,1,1,GL_RGB,GL_FLOAT)
		assert_equal(data.unpack("f*"),[0.0,0.0,0.0])
	end

	def test_gltexenv
		glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_ADD)
		assert_equal(glGetTexEnvfv(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE),GL_ADD)
		glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE)
		assert_equal(glGetTexEnviv(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE),GL_MODULATE)

		glTexEnvfv(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,[GL_ADD])
		assert_equal(glGetTexEnvfv(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE),GL_ADD)
		glTexEnviv(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,[GL_MODULATE])
		assert_equal(glGetTexEnviv(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE),GL_MODULATE)
	end

	def test_gltexgen
		glTexGend(GL_S,GL_TEXTURE_GEN_MODE,GL_REFLECTION_MAP)
		assert_equal(glGetTexGendv(GL_S,GL_TEXTURE_GEN_MODE),GL_REFLECTION_MAP)
		glTexGenf(GL_S,GL_TEXTURE_GEN_MODE,GL_EYE_LINEAR)
		assert_equal(glGetTexGenfv(GL_S,GL_TEXTURE_GEN_MODE),GL_EYE_LINEAR)
		glTexGeni(GL_S,GL_TEXTURE_GEN_MODE,GL_SPHERE_MAP)
		assert_equal(glGetTexGeniv(GL_S,GL_TEXTURE_GEN_MODE),GL_SPHERE_MAP)

		glTexGendv(GL_S,GL_TEXTURE_GEN_MODE,[GL_REFLECTION_MAP])
		assert_equal(glGetTexGendv(GL_S,GL_TEXTURE_GEN_MODE),GL_REFLECTION_MAP)
		glTexGenfv(GL_S,GL_TEXTURE_GEN_MODE,[GL_EYE_LINEAR])
		assert_equal(glGetTexGenfv(GL_S,GL_TEXTURE_GEN_MODE),GL_EYE_LINEAR)
		glTexGeniv(GL_S,GL_TEXTURE_GEN_MODE,[GL_SPHERE_MAP])
		assert_equal(glGetTexGeniv(GL_S,GL_TEXTURE_GEN_MODE),GL_SPHERE_MAP)
	end

	def test_textures
		textures = glGenTextures(2)
		assert_equal(textures.size, 2)
		assert_equal(glIsTexture(textures[0]),false)
		glBindTexture(GL_TEXTURE_2D,textures[0])
		assert_equal(glIsTexture(textures[0]),true)

		image = ([0,0,0,1,1,1] * 8).pack("f*") # 16 RGB pixels

		glTexImage2D(GL_TEXTURE_2D,0,GL_RGB8, 4, 4, 0, GL_RGB, GL_FLOAT, image)
		assert_equal(glGetTexImage(GL_TEXTURE_2D,0,GL_RGB,GL_FLOAT), image)

		glBindTexture(GL_TEXTURE_1D,textures[1])

		glTexImage1D(GL_TEXTURE_1D,0,GL_RGB8, 16, 0, GL_RGB, GL_FLOAT, image)
		assert_equal(glGetTexImage(GL_TEXTURE_1D,0,GL_RGB,GL_FLOAT), image)

		glDeleteTextures(textures)
		assert_equal(glIsTexture(textures[0]),false)
	end

	def test_pixels
		glClearColor(0,0,0,0)
		glClear(GL_COLOR_BUFFER_BIT)

		data = glReadPixels(0,0,4,4,GL_RGB,GL_FLOAT)
		assert_equal(data.unpack("f*"), [0] * 3 * 16)

		image = ([1.0] * 3 * 16).pack("f*")
		glDrawPixels(4,4,GL_RGB,GL_FLOAT,image)

		data = glReadPixels(0,0,4,4,GL_RGB,GL_FLOAT)
		assert_equal(data,image)

		#
		glClearColor(0,0,0,0)
		glClear(GL_COLOR_BUFFER_BIT)

		image = (([0.0] * 3 * 8) + ([1.0] * 3 * 8)).pack("f*")
		glDrawPixels(4,4,GL_RGB,GL_FLOAT,image)

		data = glReadPixels(0,0,4,4,GL_RGB,GL_FLOAT)
		assert_equal(data,image)
	
		glCopyPixels(0,2,4,2,GL_COLOR)
	
		data = glReadPixels(0,0,4,4,GL_RGB,GL_FLOAT)
		assert_equal(data,([1.0] * 3 * 16).pack("f*"))
	end

	def test_gltranslate
		m = [[1,0,0,0],[0,1,0,0],[0,0,1,0],[1,2,3,1]]
		glMatrixMode(GL_MODELVIEW)
		glLoadIdentity()
		glTranslated(1.0,2.0,3.0)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX),m)
		glLoadIdentity()
		glTranslatef(1.0,2.0,3.0)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX),m)
	end

	def test_glscale
		m = [[1,0,0,0],[0,2,0,0],[0,0,3,0],[0,0,0,1]]
		glMatrixMode(GL_MODELVIEW)
		glLoadIdentity()
		glScaled(1.0,2.0,3.0)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX),m)
		glLoadIdentity()
		glScalef(1.0,2.0,3.0)
		assert_equal(glGetDoublev(GL_MODELVIEW_MATRIX),m)
	end

	def test_glrotate
		m1 = [[0,0,-1,0],[0,1,0,0],[1,0,0,0],[0,0,0,1]]
		m2 = [[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]]
		glMatrixMode(GL_MODELVIEW)
		glLoadIdentity()
		glRotated(90,0,1,0)
		assert(approx_equal(glGetDoublev(GL_MODELVIEW_MATRIX).flatten,m1.flatten))
		glRotated(-90,0,1,0)
		assert(approx_equal(glGetDoublev(GL_MODELVIEW_MATRIX).flatten,m2.flatten))
	end

	def test_textures_2
		textures = glGenTextures(2)
		glBindTexture(GL_TEXTURE_1D,textures[0])
		glBindTexture(GL_TEXTURE_2D,textures[1])
		assert_equal(glAreTexturesResident(textures).size,2)
		glPrioritizeTextures(textures,[0.5,1.0])
		assert_equal(glGetTexParameterfv(GL_TEXTURE_1D,GL_TEXTURE_PRIORITY),0.5)
		assert_equal(glGetTexParameterfv(GL_TEXTURE_2D,GL_TEXTURE_PRIORITY),1.0)

		tex = ([0,0,0,1,1,1] * 2).pack("f*")
		tex2 = ([1] * 3 * 4).pack("f*")

		# 1d
		glDrawPixels(4,1,GL_RGB,GL_FLOAT,tex)
		glCopyTexImage1D(GL_TEXTURE_1D,0,GL_RGB8,0,0,4,0)
		assert_equal(glGetTexImage(GL_TEXTURE_1D,0,GL_RGB,GL_FLOAT),tex)
		
		glDrawPixels(4,1,GL_RGB,GL_FLOAT,tex2)
		glCopyTexSubImage1D(GL_TEXTURE_1D,0,0,0,0,4)
		assert_equal(glGetTexImage(GL_TEXTURE_1D,0,GL_RGB,GL_FLOAT),tex2)

		glTexSubImage1D(GL_TEXTURE_1D,0,0,4,GL_RGB,GL_FLOAT,tex)
		assert_equal(glGetTexImage(GL_TEXTURE_1D,0,GL_RGB,GL_FLOAT),tex)

		# 2d
		glDrawPixels(2,2,GL_RGB,GL_FLOAT,tex)
		glCopyTexImage2D(GL_TEXTURE_2D,0,GL_RGB8,0,0,2,2,0)
		assert_equal(glGetTexImage(GL_TEXTURE_2D,0,GL_RGB,GL_FLOAT),tex)

		glDrawPixels(2,2,GL_RGB,GL_FLOAT,tex2)
		glCopyTexSubImage2D(GL_TEXTURE_2D,0,0,0,0,0,2,2)
		assert_equal(glGetTexImage(GL_TEXTURE_2D,0,GL_RGB,GL_FLOAT),tex2)

		glTexSubImage2D(GL_TEXTURE_2D,0,0,0,2,2,GL_RGB,GL_FLOAT,tex)
		assert_equal(glGetTexImage(GL_TEXTURE_2D,0,GL_RGB,GL_FLOAT),tex)

		glDeleteTextures(textures)
	end

	def test_glmap
		control_points = [
			0.25, 0.5, 0.0,
			1.0, 1.0, 0.0
		]

		control_points_2 = [
			1.25, 1.5, 1.0,
			0.0, 0.0, 1.0
		]

		glMap1f(GL_MAP1_VERTEX_3,0,100,3,2,control_points)
		assert_equal(glGetMapfv(GL_MAP1_VERTEX_3,GL_COEFF),control_points)

		glMap1d(GL_MAP1_VERTEX_3,0,100,3,2,control_points_2)
		assert_equal(glGetMapdv(GL_MAP1_VERTEX_3,GL_COEFF),control_points_2)

		assert_equal(glGetMapiv(GL_MAP1_VERTEX_3,GL_ORDER),2)

		glMap2f(GL_MAP2_VERTEX_3,0,100,3,1,0,100,3,2,control_points)
		assert_equal(glGetMapfv(GL_MAP2_VERTEX_3,GL_COEFF),control_points)

		glMap2d(GL_MAP2_VERTEX_3,0,100,3,1,0,100,3,2,control_points_2)
		assert_equal(glGetMapdv(GL_MAP2_VERTEX_3,GL_COEFF),control_points_2)
	end

	def test_glmapgrid
		glMapGrid1d(2,1,100)
		assert_equal(glGetIntegerv(GL_MAP1_GRID_SEGMENTS),2)
		assert_equal(glGetIntegerv(GL_MAP1_GRID_DOMAIN),[1,100])
		glMapGrid1f(3,2,99)
		assert_equal(glGetIntegerv(GL_MAP1_GRID_SEGMENTS),3)
		assert_equal(glGetIntegerv(GL_MAP1_GRID_DOMAIN),[2,99])
		#
		glMapGrid2d(2,1,100,3,2,99)
		assert_equal(glGetIntegerv(GL_MAP2_GRID_SEGMENTS),[2,3])
		assert_equal(glGetIntegerv(GL_MAP2_GRID_DOMAIN),[1,100,2,99])

		glMapGrid2f(3,2,99,4,3,98)
		assert_equal(glGetIntegerv(GL_MAP2_GRID_SEGMENTS),[3,4])
		assert_equal(glGetIntegerv(GL_MAP2_GRID_DOMAIN),[2,99,3,98])
	end

	def test_gleval
		control_points = [0,0,0,1,1,1]
		glMap1f(GL_MAP1_VERTEX_3,0,1,3,2,control_points)
		glMap2f(GL_MAP2_VERTEX_3,0,1,3,1,0,1,3,2,control_points)
		glEnable(GL_MAP1_VERTEX_3)
		glEnable(GL_MAP2_VERTEX_3)

		buf = glFeedbackBuffer(256,GL_3D)
		glRenderMode(GL_FEEDBACK)

		glBegin(GL_TRIANGLES)
		glEvalCoord1d(1.0)
		glEvalCoord1dv([1.0])
		glEvalCoord1f(1.0)
		
		glEvalCoord1fv([1.0])
		glEvalCoord1fv([1.0])
		glEvalCoord1fv([1.0])

		glEvalCoord2d(1.0,1.0)
		glEvalCoord2dv([1.0,1.0])
		glEvalCoord2f(1.0,1.0)

		glEvalCoord2fv([1.0,1.0])
		glEvalCoord2fv([1.0,1.0])
		glEvalCoord2fv([1.0,1.0])

		glEvalPoint1(0.0)
		glEvalPoint1(0.0)
		glEvalPoint1(0.0)

		glEvalPoint2(0.0,1.0)
		glEvalPoint2(0.0,1.0)
		glEvalPoint2(0.0,1.0)

		glEnd

		count = glRenderMode(GL_RENDER)
		assert_equal(count,(3*3+2)*6)

		glDisable(GL_MAP2_VERTEX_3)
		glDisable(GL_MAP1_VERTEX_3)
	end

	def test_glevalmesh
		control_points = [0,0,0,1,1,1]
		glMap1f(GL_MAP1_VERTEX_3,0,1,3,2,control_points)
		glMap2f(GL_MAP2_VERTEX_3,0,1,3,1,0,1,3,2,control_points)
		glEnable(GL_MAP1_VERTEX_3)
		glEnable(GL_MAP2_VERTEX_3)
		
		buf = glFeedbackBuffer(256,GL_3D)
		glRenderMode(GL_FEEDBACK)
		
		glEvalMesh1(GL_POINT,0,1)
		glEvalMesh2(GL_POINT,0,1,0,1)
		
		count = glRenderMode(GL_RENDER)
		assert_equal(count,((3+1)*(2+2*2)))
		
		glDisable(GL_MAP2_VERTEX_3)
		glDisable(GL_MAP1_VERTEX_3)
	end

	def test_glaccum
		return if glGetIntegerv(GL_ACCUM_RED_BITS) <= 0 # no accumulation buffer ?

		i1 = ([0.0] * 3 + [1.0] * 3 ).pack("f*")
		i2 = ([1.0] * 3 + [0.0] * 3 ).pack("f*")

		# init
		glClearColor(0,0,0,0)	
		glClear(GL_ACCUM_BUFFER_BIT | GL_COLOR_BUFFER_BIT)
		# left
		glDrawPixels(2,1,GL_RGB,GL_FLOAT,i1)
		glAccum(GL_ACCUM,1.0)
		# right
		glClear(GL_COLOR_BUFFER_BIT)
		glDrawPixels(2,1,GL_RGB,GL_FLOAT,i2)
		glAccum(GL_ACCUM,1.0)
		# combine
		glAccum(GL_RETURN,1.0)

		data = glReadPixels(0,0,2,1,GL_RGB,GL_FLOAT)
		assert_equal(data.unpack("f*"),[1.0] * 2 * 3)
	end

	def test_displaylists
		base = glGenLists(2)
		assert(base>0)
		glListBase(1)
		assert_equal(glGetIntegerv(GL_LIST_BASE),1)
		glListBase(0)
		assert_equal(glGetIntegerv(GL_LIST_BASE),0)

		glNewList(base+0, GL_COMPILE)
		glBegin(GL_TRIANGLES)
		glVertex2f(0,0)
		glVertex2f(1,0)
		glVertex2f(1,1)
		glEnd()
		glEndList()

		glNewList(base+1, GL_COMPILE)
		glBegin(GL_TRIANGLES)
		glVertex2f(0,0)
		glVertex2f(1,0)
		glVertex2f(1,1)
		glEnd()
		glEndList()

		assert_equal(glIsList(base+0),true)
		assert_equal(glIsList(base+1),true)
		assert_equal(glIsList(base+2),false)

		#		
		buf = glFeedbackBuffer(256,GL_3D)
		glRenderMode(GL_FEEDBACK)

		glCallList(base+0)
		glCallLists(GL_INT,[base+0,base+1])

		count = glRenderMode(GL_RENDER)
		assert_equal(count,(3*3+2) * 3) # 3 triangles
		#

		glDeleteLists(base,2)

		assert_equal(glIsList(base+0),false)
		assert_equal(glIsList(base+1),false)
	end

	def test_arrays
		glEnableClientState(GL_VERTEX_ARRAY)
		
		va = [0,0, 0,1, 1,1].pack("f*")
		glVertexPointer(2,GL_FLOAT,0,va)
		assert_equal(glGetPointerv(GL_VERTEX_ARRAY_POINTER),va)
		assert_equal(glGetIntegerv(GL_VERTEX_ARRAY_SIZE),2)
		assert_equal(glGetIntegerv(GL_VERTEX_ARRAY_TYPE),GL_FLOAT)
		assert_equal(glGetIntegerv(GL_VERTEX_ARRAY_STRIDE),0)
		#
		buf = glFeedbackBuffer(256,GL_3D)
		glRenderMode(GL_FEEDBACK)

		glDrawArrays(GL_TRIANGLES,0,3)

		glBegin(GL_TRIANGLES)
		glArrayElement(0)
		glArrayElement(1)
		glArrayElement(2)
		glEnd()

		glDrawElements(GL_TRIANGLES,3,GL_UNSIGNED_BYTE,[0,1,2].pack("C*"))

		glInterleavedArrays(GL_V2F,0, va)

		glDrawElements(GL_TRIANGLES,3,GL_UNSIGNED_BYTE,[0,1,2].pack("C*"))

		#		
		count = glRenderMode(GL_RENDER)
		assert_equal(count,44)

		glDisableClientState(GL_VERTEX_ARRAY)
	end

	def test_arrays_2
		na = [0,1,0].pack("f*")
		ta = [1,0,1,0].pack("f*")
		ea = [0].pack("C*")
		ca = [1,0,1,0].pack("f*")
		
		glNormalPointer(GL_FLOAT,0,na)
		assert_equal(glGetIntegerv(GL_NORMAL_ARRAY_TYPE),GL_FLOAT)
		assert_equal(glGetIntegerv(GL_NORMAL_ARRAY_STRIDE),0)
		assert_equal(glGetPointerv(GL_NORMAL_ARRAY_POINTER),na)
		glTexCoordPointer(4,GL_FLOAT,0,ta)
		assert_equal(glGetIntegerv(GL_TEXTURE_COORD_ARRAY_SIZE),4)
		assert_equal(glGetIntegerv(GL_TEXTURE_COORD_ARRAY_TYPE),GL_FLOAT)
		assert_equal(glGetIntegerv(GL_TEXTURE_COORD_ARRAY_STRIDE),0)
		assert_equal(glGetPointerv(GL_TEXTURE_COORD_ARRAY_POINTER),ta)
		glEdgeFlagPointer(0,ea)
		assert_equal(glGetIntegerv(GL_EDGE_FLAG_ARRAY_STRIDE),0)
		assert_equal(glGetPointerv(GL_EDGE_FLAG_ARRAY_POINTER),ea)
		glColorPointer(4,GL_FLOAT,0,ca)
		assert_equal(glGetIntegerv(GL_COLOR_ARRAY_SIZE),4)
		assert_equal(glGetIntegerv(GL_COLOR_ARRAY_TYPE),GL_FLOAT)
		assert_equal(glGetIntegerv(GL_COLOR_ARRAY_STRIDE),0)
		assert_equal(glGetPointerv(GL_COLOR_ARRAY_POINTER),ca)
		#
		glEnable(GL_COLOR_ARRAY)
		glEnable(GL_NORMAL_ARRAY)
		glEnable(GL_TEXTURE_COORD_ARRAY)
		glEnable(GL_EDGE_FLAG_ARRAY)

		glBegin(GL_TRIANGLES)
		glArrayElement(0)
		glEnd()

		assert_equal(glGetDoublev(GL_CURRENT_COLOR),[1,0,1,0])
		assert_equal(glGetDoublev(GL_CURRENT_NORMAL),[0,1,0])
		assert_equal(glGetDoublev(GL_CURRENT_TEXTURE_COORDS),[1,0,1,0])
		assert_equal(glGetBooleanv(GL_EDGE_FLAG),false)

		glDisable(GL_EDGE_FLAG_ARRAY)
		glDisable(GL_TEXTURE_COORD_ARRAY)
		glDisable(GL_NORMAL_ARRAY)
		glDisable(GL_COLOR_ARRAY)
	end
end