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Diffstat (limited to 'silx/gui/plot/backends/glutils/GLSupport.py')
| -rw-r--r-- | silx/gui/plot/backends/glutils/GLSupport.py | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/silx/gui/plot/backends/glutils/GLSupport.py b/silx/gui/plot/backends/glutils/GLSupport.py deleted file mode 100644 index da6dffa..0000000 --- a/silx/gui/plot/backends/glutils/GLSupport.py +++ /dev/null @@ -1,158 +0,0 @@ -# coding: utf-8 -# /*########################################################################## -# -# Copyright (c) 2014-2018 European Synchrotron Radiation Facility -# -# Permission is hereby granted, free of charge, to any person obtaining a copy -# of this software and associated documentation files (the "Software"), to deal -# in the Software without restriction, including without limitation the rights -# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -# copies of the Software, and to permit persons to whom the Software is -# furnished to do so, subject to the following conditions: -# -# The above copyright notice and this permission notice shall be included in -# all copies or substantial portions of the Software. -# -# 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. -# -# ############################################################################*/ -""" -This module provides convenient classes and functions for OpenGL rendering. -""" - -__authors__ = ["T. Vincent"] -__license__ = "MIT" -__date__ = "03/04/2017" - - -import numpy - -from ...._glutils import gl - - -def buildFillMaskIndices(nIndices, dtype=None): - """Returns triangle strip indices for rendering a filled polygon mask - - :param int nIndices: Number of points - :param Union[numpy.dtype,None] dtype: - If specified the dtype of the returned indices array - :return: 1D array of indices constructing a triangle strip - :rtype: numpy.ndarray - """ - if dtype is None: - if nIndices <= numpy.iinfo(numpy.uint16).max + 1: - dtype = numpy.uint16 - else: - dtype = numpy.uint32 - - lastIndex = nIndices - 1 - splitIndex = lastIndex // 2 + 1 - indices = numpy.empty(nIndices, dtype=dtype) - indices[::2] = numpy.arange(0, splitIndex, step=1, dtype=dtype) - indices[1::2] = numpy.arange(lastIndex, splitIndex - 1, step=-1, - dtype=dtype) - return indices - - -class FilledShape2D(object): - _NO_HATCH = 0 - _HATCH_STEP = 20 - - def __init__(self, points, style='solid', color=(0., 0., 0., 1.)): - self.vertices = numpy.array(points, dtype=numpy.float32, copy=False) - self._indices = buildFillMaskIndices(len(self.vertices)) - - tVertex = numpy.transpose(self.vertices) - xMin, xMax = min(tVertex[0]), max(tVertex[0]) - yMin, yMax = min(tVertex[1]), max(tVertex[1]) - self.bboxVertices = numpy.array(((xMin, yMin), (xMin, yMax), - (xMax, yMin), (xMax, yMax)), - dtype=numpy.float32) - self._xMin, self._xMax = xMin, xMax - self._yMin, self._yMax = yMin, yMax - - self.style = style - self.color = color - - def render(self, posAttrib, colorUnif, hatchStepUnif): - assert self.style in ('hatch', 'solid') - gl.glUniform4f(colorUnif, *self.color) - step = self._HATCH_STEP if self.style == 'hatch' else self._NO_HATCH - gl.glUniform1i(hatchStepUnif, step) - - # Prepare fill mask - gl.glEnableVertexAttribArray(posAttrib) - gl.glVertexAttribPointer(posAttrib, - 2, - gl.GL_FLOAT, - gl.GL_FALSE, - 0, self.vertices) - - gl.glEnable(gl.GL_STENCIL_TEST) - gl.glStencilMask(1) - gl.glStencilFunc(gl.GL_ALWAYS, 1, 1) - gl.glStencilOp(gl.GL_INVERT, gl.GL_INVERT, gl.GL_INVERT) - gl.glColorMask(gl.GL_FALSE, gl.GL_FALSE, gl.GL_FALSE, gl.GL_FALSE) - gl.glDepthMask(gl.GL_FALSE) - - gl.glDrawElements(gl.GL_TRIANGLE_STRIP, len(self._indices), - gl.GL_UNSIGNED_SHORT, self._indices) - - gl.glStencilFunc(gl.GL_EQUAL, 1, 1) - # Reset stencil while drawing - gl.glStencilOp(gl.GL_ZERO, gl.GL_ZERO, gl.GL_ZERO) - gl.glColorMask(gl.GL_TRUE, gl.GL_TRUE, gl.GL_TRUE, gl.GL_TRUE) - gl.glDepthMask(gl.GL_TRUE) - - gl.glVertexAttribPointer(posAttrib, - 2, - gl.GL_FLOAT, - gl.GL_FALSE, - 0, self.bboxVertices) - gl.glDrawArrays(gl.GL_TRIANGLE_STRIP, 0, len(self.bboxVertices)) - - gl.glDisable(gl.GL_STENCIL_TEST) - - -# matrix ###################################################################### - -def mat4Ortho(left, right, bottom, top, near, far): - """Orthographic projection matrix (row-major)""" - return numpy.array(( - (2./(right - left), 0., 0., -(right+left)/float(right-left)), - (0., 2./(top - bottom), 0., -(top+bottom)/float(top-bottom)), - (0., 0., -2./(far-near), -(far+near)/float(far-near)), - (0., 0., 0., 1.)), dtype=numpy.float64) - - -def mat4Translate(x=0., y=0., z=0.): - """Translation matrix (row-major)""" - return numpy.array(( - (1., 0., 0., x), - (0., 1., 0., y), - (0., 0., 1., z), - (0., 0., 0., 1.)), dtype=numpy.float64) - - -def mat4Scale(sx=1., sy=1., sz=1.): - """Scale matrix (row-major)""" - return numpy.array(( - (sx, 0., 0., 0.), - (0., sy, 0., 0.), - (0., 0., sz, 0.), - (0., 0., 0., 1.)), dtype=numpy.float64) - - -def mat4Identity(): - """Identity matrix""" - return numpy.array(( - (1., 0., 0., 0.), - (0., 1., 0., 0.), - (0., 0., 1., 0.), - (0., 0., 0., 1.)), dtype=numpy.float64) |