diff options
Diffstat (limited to 'examples/declarative/openglunderqml/squirclerenderer.py')
-rw-r--r-- | examples/declarative/openglunderqml/squirclerenderer.py | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/examples/declarative/openglunderqml/squirclerenderer.py b/examples/declarative/openglunderqml/squirclerenderer.py deleted file mode 100644 index 5d1759251..000000000 --- a/examples/declarative/openglunderqml/squirclerenderer.py +++ /dev/null @@ -1,99 +0,0 @@ -# Copyright (C) 2022 The Qt Company Ltd. -# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause - -from textwrap import dedent - -import numpy as np -from OpenGL.GL import (GL_ARRAY_BUFFER, GL_BLEND, GL_DEPTH_TEST, GL_FLOAT, - GL_ONE, GL_SRC_ALPHA, GL_TRIANGLE_STRIP) -from PySide6.QtCore import QSize, Slot -from PySide6.QtGui import QOpenGLFunctions -from PySide6.QtOpenGL import (QOpenGLShader, QOpenGLShaderProgram, - QOpenGLVersionProfile) -from PySide6.QtQuick import QQuickWindow, QSGRendererInterface - -VERTEX_SHADER = dedent( - """\ - attribute highp vec4 vertices; - varying highp vec2 coords; - void main() { - gl_Position = vertices; - coords = vertices.xy; - } - """ -) -FRAGMENT_SHADER = dedent( - """\ - uniform lowp float t; - varying highp vec2 coords; - void main() { - lowp float i = 1. - (pow(abs(coords.x), 4.) + pow(abs(coords.y), 4.)); - i = smoothstep(t - 0.8, t + 0.8, i); - i = floor(i * 20.) / 20.; - gl_FragColor = vec4(coords * .5 + .5, i, i); - } - """ -) - - -class SquircleRenderer(QOpenGLFunctions): - def __init__(self): - QOpenGLFunctions.__init__(self) - self._viewport_size = QSize() - self._t = 0.0 - self._program = None - self._window = QQuickWindow() - - def setT(self, t): - self._t = t - - def setViewportSize(self, size): - self._viewport_size = size - - def setWindow(self, window): - self._window = window - - @Slot() - def init(self): - if not self._program: - rif = self._window.rendererInterface() - assert (rif.graphicsApi() == QSGRendererInterface.OpenGL) - self.initializeOpenGLFunctions() - self._program = QOpenGLShaderProgram() - self._program.addCacheableShaderFromSourceCode(QOpenGLShader.Vertex, VERTEX_SHADER) - self._program.addCacheableShaderFromSourceCode(QOpenGLShader.Fragment, FRAGMENT_SHADER) - self._program.bindAttributeLocation("vertices", 0) - self._program.link() - - @Slot() - def paint(self): - # Play nice with the RHI. Not strictly needed when the scenegraph uses - # OpenGL directly. - self._window.beginExternalCommands() - - self._program.bind() - - self._program.enableAttributeArray(0) - - values = np.array([-1, -1, 1, -1, -1, 1, 1, 1], dtype="single") - - # This example relies on (deprecated) client-side pointers for the vertex - # input. Therefore, we have to make sure no vertex buffer is bound. - self.glBindBuffer(GL_ARRAY_BUFFER, 0) - - self._program.setAttributeArray(0, GL_FLOAT, values, 2) - self._program.setUniformValue1f("t", self._t) - - self.glViewport(0, 0, self._viewport_size.width(), self._viewport_size.height()) - - self.glDisable(GL_DEPTH_TEST) - - self.glEnable(GL_BLEND) - self.glBlendFunc(GL_SRC_ALPHA, GL_ONE) - - self.glDrawArrays(GL_TRIANGLE_STRIP, 0, 4) - - self._program.disableAttributeArray(0) - self._program.release() - - self._window.endExternalCommands() |