def useShaders(self, shaderProgram: QOpenGLShaderProgram,
shaders: {"shaderName": ["shaderType"]}, attrLocs: dict):
""
print("program shaders: ", shaderProgram.shaders())
for shaderName, shaderTypes in shaders.items():
#
if len(shaderTypes) == 2:
self.useShaderSingleName(shaderProgram=shaderProgram,
shaderName=shaderName,
attrLocs=attrLocs)
elif len(shaderTypes) == 1:
shaderType = shaderTypes[0]
if shaderType == "vertex":
shader = self.loadVertexShader(shaderName)
else:
shader = self.loadFragmentShader(shaderName)
shaderProgram.addShader(shader)
# adding shader
self.bindLinkProgram(shaderProgram, attrLocs)
class TGLViewport(QOpenGLWidget, QOpenGLFunctions):
def __init__(self, parent=None):
QOpenGLWidget.__init__(self, parent)
QOpenGLFunctions.__init__(self)
self.setMinimumSize(32, 32)
self.info = ""
self._supported_images = [
"TGA", "PNG", "JPG", "JPEG", "TIF", "TIFF", "BMP", "DDS"
]
# indices
indices = [0, 1, 3, 1, 2, 3]
self._indices = array('I', indices)
# vertices
# 3 position | 2 texture coord
vertex = [
1.0,
1.0,
0.0,
1.0,
1.0, # top right
1.0,
-1.0,
0.0,
1.0,
0.0, # bottom right
-1.0,
-1.0,
0.0,
0.0,
0.0, # bottom left
-1.0,
1.0,
0.0,
0.0,
1.0 # top left
]
self._vertex = array('f', vertex)
# opengl data related
self._program = QOpenGLShaderProgram()
self._program_bg = QOpenGLShaderProgram()
self._vao = QOpenGLVertexArrayObject()
self._vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self._texture = None
self._texture_size = (1, 1)
self._location = ()
self._colors_default = (QColor.fromRgbF(0.65, 0.65, 0.65, 1.0),
QColor.fromRgbF(0.90, 0.90, 0.90, 1.0))
self._u_colors = self._colors_default
self._height = QVector4D(0, self.height(), 0, 0)
self._u_channels = QMatrix4x4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0,
0, 0)
def initializeGL(self):
# Set up the rendering context, define display lists etc.
self.initializeOpenGLFunctions()
self.glClearColor(0.2, 0.0, 0.2, 0.0)
self.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA)
# shader code (OpenGL ES)
# texture
vs_source_es = """
attribute highp vec3 Pos;
attribute highp vec2 UV;
uniform highp vec2 Scale;
varying highp vec2 oUV;
void main() {
gl_Position = vec4(Pos * vec3(Scale, 1.0), 1.0);
oUV = UV;
}
"""
ps_source_es = """
varying highp vec2 oUV;
uniform sampler2D Texture;
uniform highp mat4 Channels;
uniform highp vec4 Add;
void main() {
gl_FragColor = texture2D(Texture, oUV * vec2(1.0, -1.0)) * Channels;
gl_FragColor.a += (1.0 - Channels[3][3]);
}
"""
# background
vs_grid_es = """
attribute highp vec3 Pos;
void main() {
gl_Position = vec4(Pos, 1.0);
}
"""
ps_grid_es = """
uniform highp vec4 Color1;
uniform highp vec4 Color2;
uniform highp vec4 Height;
void main() {
highp vec2 a = floor((Height.xy - gl_FragCoord.xy) / 64.0);
highp float even = mod(a.x + a.y, 2.0);
highp vec3 c = mix(Color1.rgb, Color2.rgb, even);
gl_FragColor = vec4(c, 1);
}
"""
# program - texture
# shader
vs = self.__create_shader(QOpenGLShader.Vertex, vs_source_es)
fs = self.__create_shader(QOpenGLShader.Fragment, ps_source_es)
# program
self._program = QOpenGLShaderProgram(self.context())
self._program.addShader(vs)
self._program.addShader(fs)
# attribute location
self._program.bindAttributeLocation("Pos", 0)
self._program.bindAttributeLocation("UV", 1)
# link program
r = self._program.link()
# program - background
# shader
vs = self.__create_shader(QOpenGLShader.Vertex, vs_grid_es)
fs = self.__create_shader(QOpenGLShader.Fragment, ps_grid_es)
# program
self._program_bg = QOpenGLShaderProgram(self.context())
self._program_bg.addShader(vs)
self._program_bg.addShader(fs)
# attribute location
self._program_bg.bindAttributeLocation("Pos", 0)
# link program
r = self._program_bg.link()
# uniform locations
self._location = (
self._program.uniformLocation("Scale"),
self._program.uniformLocation("Channels"),
self._program_bg.uniformLocation("Color1"),
self._program_bg.uniformLocation("Color2"),
self._program_bg.uniformLocation("Height"),
)
# vao
r = self._vao.create()
r = self._vao.bind()
# vbo
r = self._vbo.create()
self._vbo.setUsagePattern(QOpenGLBuffer.StaticDraw)
r = self._vbo.bind()
sz_float = ctypes.sizeof(ctypes.c_float)
self._vbo.allocate(self._vertex.tobytes(),
sz_float * len(self._vertex))
self._vao.release()
# texture
self.set_texture(r"C:")
def resizeGL(self, width, height):
self.__update_scale(width, height)
self._height = QVector4D(0, self.height(), 0, 0)
self.glViewport(0, 0, width, height)
def paintGL(self):
SZ_FLOAT = ctypes.sizeof(ctypes.c_float)
# draw the scene
self.glClear(GL.GL_COLOR_BUFFER_BIT)
self._vao.bind()
# background
self._program_bg.bind()
self._program.setAttributeBuffer(0, GL.GL_FLOAT, 0, 3, 5 * SZ_FLOAT)
self._program.enableAttributeArray(0)
self._program.setUniformValue(self._location[2], self._u_colors[0])
self._program.setUniformValue(self._location[3], self._u_colors[1])
self._program.setUniformValue(self._location[4], self._height)
self.glDrawElements(GL.GL_TRIANGLES, len(self._indices),
GL.GL_UNSIGNED_INT, self._indices.tobytes())
# texture
if self._texture is None:
return
self.glEnable(GL.GL_BLEND)
self._program.bind()
self._program.setAttributeBuffer(1, GL.GL_FLOAT, 3 * SZ_FLOAT, 2,
5 * SZ_FLOAT)
self._program.enableAttributeArray(1)
self._program.setUniformValue(self._location[0], *self._scale)
self._program.setUniformValue(self._location[1], self._u_channels)
self._texture.bind()
self.glDrawElements(GL.GL_TRIANGLES, len(self._indices),
GL.GL_UNSIGNED_INT, self._indices.tobytes())
self.glDisable(GL.GL_BLEND)
@staticmethod
def __create_shader(type_: QOpenGLShader.ShaderType, source):
shader = QOpenGLShader(type_)
r = shader.compileSourceCode(source)
if not r:
print(shader.log())
return shader
def __update_scale(self, width, height):
# calc texture scale
if self._texture_size[0] < width and self._texture_size[1] < height:
self._scale = (self._texture_size[0] / width,
self._texture_size[1] / height)
else:
tw = width
th = self._texture_size[1] / self._texture_size[0] * tw
if th > height:
th = height
tw = th * self._texture_size[0] / self._texture_size[1]
self._scale = (tw / width, th / height)
def get_gl_info(self):
self.makeCurrent()
info = """
Vendor: {0}
Renderer: {1}
OpenGL Version: {2}
Shader Version: {3}
""".format(self.glGetString(GL.GL_VENDOR), self.glGetString(GL.GL_RENDERER),
self.glGetString(GL.GL_VERSION),
self.glGetString(GL.GL_SHADING_LANGUAGE_VERSION))
return info
def set_channels(self, r, g, b, a):
r, g, b, a = float(r), float(g), float(b), float(a)
s = r + g + b
if s > 1.1:
self._u_channels = QMatrix4x4(r, 0, 0, 0, 0, g, 0, 0, 0, 0, b, 0,
0, 0, 0, a)
elif s < 0.1:
self._u_channels = QMatrix4x4(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
a, a, a, 0)
elif a:
self._u_channels = QMatrix4x4(r, 0, 0, 0, 0, g, 0, 0, 0, 0, b, 0,
0, 0, 0, a)
else:
self._u_channels = QMatrix4x4(r, r, r, 0, g, g, g, 0, b, b, b, 0,
0, 0, 0, a)
# redraw
self.update()
def set_texture(self, filename):
# load image
p = Path(filename)
suffix = p.suffix[1:].upper()
try:
if p.is_file() and suffix in self._supported_images:
pim = Image.open(filename)
img = ImageQt(pim)
self.info = f"{pim.format} - {pim.size} - {pim.mode} "
else:
ico = QFileIconProvider().icon(QFileInfo(filename))
pix = ico.pixmap(256, 256)
img = pix.toImage()
self.info = "not an image "
except UnidentifiedImageError as e:
print("UnidentifiedImageError:\n", e, flush=True)
return
self._texture_size = img.width(), img.height()
self.__update_scale(self.width(), self.height())
# create texture
self.makeCurrent()
self._texture = QOpenGLTexture(QOpenGLTexture.Target2D)
self._texture.create()
self._texture.bind()
self._texture.setMinMagFilters(QOpenGLTexture.LinearMipMapLinear,
QOpenGLTexture.Linear)
self._texture.setWrapMode(QOpenGLTexture.DirectionS,
QOpenGLTexture.Repeat)
self._texture.setWrapMode(QOpenGLTexture.DirectionT,
QOpenGLTexture.Repeat)
self._texture.setData(img)
self._texture.release()
# redraw
self.update()
def set_colors(self, checkerboard, color1, color2):
if checkerboard:
self._u_colors = self._colors_default
else:
self._u_colors = (color1, color2)
self.update()
class EventsGL(QOpenGLWidget):
"Cube gl widget"
def __init__(self, parent=None):
QOpenGLWidget.__init__(self, parent)
# camera
self.camera = QtCamera()
self.camera.position = QVector3D(0.0, 0.0, 3.0)
self.camera.front = QVector3D(0.0, 0.0, -1.0)
self.camera.up = QVector3D(0.0, 1.0, 0.0)
self.camera.movementSensitivity = 0.05
# shaders etc
tutoTutoDir = os.path.dirname(__file__)
tutoPardir = os.path.join(tutoTutoDir, os.pardir)
tutoPardir = os.path.realpath(tutoPardir)
mediaDir = os.path.join(tutoPardir, "media")
shaderDir = os.path.join(mediaDir, "shaders")
availableShaders = ["cube"]
self.shaders = {
name: {
"fragment": os.path.join(shaderDir, name + ".frag"),
"vertex": os.path.join(shaderDir, name + ".vert")
}
for name in availableShaders
}
self.core = "--coreprofile" in QCoreApplication.arguments()
imdir = os.path.join(mediaDir, "images")
imFName = "im"
imageFile1 = os.path.join(imdir, imFName + "0.png")
self.image1 = QImage(imageFile1).mirrored()
imageFile2 = os.path.join(imdir, imFName + "1.png")
self.image2 = QImage(imageFile2).mirrored()
# opengl data related
self.context = QOpenGLContext()
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.program = QOpenGLShaderProgram()
self.texture1 = None
self.texture2 = None
self.texUnit1 = 0
self.texUnit2 = 1
# vertex data
self.cubeVertices = np.array(
[
# pos vec3 || texcoord vec2
-0.5,
-0.5,
-0.5,
0.0,
0.0,
0.5,
-0.5,
-0.5,
1.0,
0.0,
0.5,
0.5,
-0.5,
1.0,
1.0,
0.5,
0.5,
-0.5,
1.0,
1.0,
-0.5,
0.5,
-0.5,
0.0,
1.0,
-0.5,
-0.5,
-0.5,
0.0,
0.0,
-0.5,
-0.5,
0.5,
0.0,
0.0,
0.5,
-0.5,
0.5,
1.0,
0.0,
0.5,
0.5,
0.5,
1.0,
1.0,
0.5,
0.5,
0.5,
1.0,
1.0,
-0.5,
0.5,
0.5,
0.0,
1.0,
-0.5,
-0.5,
0.5,
0.0,
0.0,
-0.5,
0.5,
0.5,
1.0,
0.0,
-0.5,
0.5,
-0.5,
1.0,
1.0,
-0.5,
-0.5,
-0.5,
0.0,
1.0,
-0.5,
-0.5,
-0.5,
0.0,
1.0,
-0.5,
-0.5,
0.5,
0.0,
0.0,
-0.5,
0.5,
0.5,
1.0,
0.0,
0.5,
0.5,
0.5,
1.0,
0.0,
0.5,
0.5,
-0.5,
1.0,
1.0,
0.5,
-0.5,
-0.5,
0.0,
1.0,
0.5,
-0.5,
-0.5,
0.0,
1.0,
0.5,
-0.5,
0.5,
0.0,
0.0,
0.5,
0.5,
0.5,
1.0,
0.0,
-0.5,
-0.5,
-0.5,
0.0,
1.0,
0.5,
-0.5,
-0.5,
1.0,
1.0,
0.5,
-0.5,
0.5,
1.0,
0.0,
0.5,
-0.5,
0.5,
1.0,
0.0,
-0.5,
-0.5,
0.5,
0.0,
0.0,
-0.5,
-0.5,
-0.5,
0.0,
1.0,
-0.5,
0.5,
-0.5,
0.0,
1.0,
0.5,
0.5,
-0.5,
1.0,
1.0,
0.5,
0.5,
0.5,
1.0,
0.0,
0.5,
0.5,
0.5,
1.0,
0.0,
-0.5,
0.5,
0.5,
0.0,
0.0,
-0.5,
0.5,
-0.5,
0.0,
1.0
],
dtype=ctypes.c_float)
# cube worldSpace coordinates
self.cubeCoords = [
QVector3D(0.2, 1.1, -1.0),
QVector3D(2.0, 5.0, -15.0),
QVector3D(-1.5, -2.2, -2.5),
QVector3D(-3.8, -2.0, -12.3),
QVector3D(2.4, -0.4, -3.5),
QVector3D(-1.7, 3.0, -7.5),
QVector3D(1.3, -2.0, -2.5),
QVector3D(1.5, 2.0, -2.5),
QVector3D(1.5, 0.2, -1.5),
QVector3D(-1.3, 1.0, -1.5)
]
self.rotateVector = QVector3D(0.7, 0.2, 0.5)
def loadShader(self, shaderName: str, shaderType: str):
"Load shader"
shader = self.shaders[shaderName]
shaderSourcePath = shader[shaderType]
if shaderType == "vertex":
shader = QOpenGLShader(QOpenGLShader.Vertex)
else:
shader = QOpenGLShader(QOpenGLShader.Fragment)
#
isCompiled = shader.compileSourceFile(shaderSourcePath)
if isCompiled is False:
print(shader.log())
raise ValueError(
"{0} shader {2} known as {1} is not compiled".format(
shaderType, shaderName, shaderSourcePath))
return shader
def useShaders(self, shaderProgram: QOpenGLShaderProgram,
shaders: {"shaderName": ["shaderType"]}, attrLocs: dict):
""
print("program shaders: ", shaderProgram.shaders())
for shaderName, shaderTypes in shaders.items():
#
if len(shaderTypes) == 2:
self.useShaderSingleName(shaderProgram=shaderProgram,
shaderName=shaderName,
attrLocs=attrLocs)
elif len(shaderTypes) == 1:
shaderType = shaderTypes[0]
if shaderType == "vertex":
shader = self.loadVertexShader(shaderName)
else:
shader = self.loadFragmentShader(shaderName)
shaderProgram.addShader(shader)
# adding shader
self.bindLinkProgram(shaderProgram, attrLocs)
def loadVertexShader(self, shaderName: str):
"load vertex shader"
return self.loadShader(shaderName, "vertex")
def loadFragmentShader(self, shaderName: str):
"load fragment shader"
return self.loadShader(shaderName, "fragment")
def getGlInfo(self):
"Get opengl info"
info = """
Vendor: {0}
Renderer: {1}
OpenGL Version: {2}
Shader Version: {3}
""".format(pygl.glGetString(pygl.GL_VENDOR),
pygl.glGetString(pygl.GL_RENDERER),
pygl.glGetString(pygl.GL_VERSION),
pygl.glGetString(pygl.GL_SHADING_LANGUAGE_VERSION))
return info
def moveCamera(self, direction: str):
"Move camera to certain direction and update gl widget"
self.camera.move(direction, deltaTime=0.05)
self.update()
def turnAround(self, x: float, y: float):
""
self.camera.lookAround(xoffset=x, yoffset=y, pitchBound=True)
self.update()
def rotateCubes(self, xval: float, yval: float, zval: float):
""
self.rotateVector.setZ(zval)
self.rotateVector.setY(yval)
self.rotateVector.setX(xval)
self.update()
def cleanUpGl(self):
"Clean up everything"
self.context.makeCurrent()
self.vbo.destroy()
self.texture1.destroy()
self.texture2.destroy()
self.vao.destroy()
del self.program
self.program = None
self.doneCurrent()
def resizeGL(self, width: int, height: int):
"Resize the viewport"
funcs = self.context.functions()
funcs.glViewport(0, 0, width, height)
def initializeGL(self):
print('gl initial')
print(self.getGlInfo())
# create context and make it current
self.context.create()
self.context.aboutToBeDestroyed.connect(self.cleanUpGl)
# initialize functions
funcs = self.context.functions()
funcs.initializeOpenGLFunctions()
funcs.glClearColor(0.0, 0.4, 0.4, 0)
funcs.glEnable(pygl.GL_DEPTH_TEST)
funcs.glEnable(pygl.GL_TEXTURE_2D)
# create uniform values for shaders
# deal with shaders
# cube shader
self.program = QOpenGLShaderProgram(self.context)
vshader = self.loadVertexShader("cube")
fshader = self.loadFragmentShader("cube")
self.program.addShader(vshader) # adding vertex shader
self.program.addShader(fshader) # adding fragment shader
self.program.bindAttributeLocation("aPos", 0)
self.program.bindAttributeLocation("aTexCoord", 1)
isLinked = self.program.link()
print("cube shader program is linked: ", isLinked)
# bind the program
self.program.bind()
self.program.setUniformValue('myTexture1', self.texUnit1)
self.program.setUniformValue('myTexture2', self.texUnit2)
#
# deal with vaos and vbo
# vbo
isVbo = self.vbo.create()
isVboBound = self.vbo.bind()
floatSize = ctypes.sizeof(ctypes.c_float)
# allocate space on vbo buffer
self.vbo.allocate(self.cubeVertices.tobytes(),
floatSize * self.cubeVertices.size)
self.vao.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
funcs.glEnableVertexAttribArray(0) # viewport
funcs.glVertexAttribPointer(0, 3, int(pygl.GL_FLOAT),
int(pygl.GL_FALSE), 5 * floatSize,
VoidPtr(0))
funcs.glEnableVertexAttribArray(1)
funcs.glVertexAttribPointer(1, 2, int(pygl.GL_FLOAT),
int(pygl.GL_FALSE), 5 * floatSize,
VoidPtr(3 * floatSize))
# deal with textures
# first texture
self.texture1 = QOpenGLTexture(QOpenGLTexture.Target2D)
self.texture1.create()
self.texture1.bind(self.texUnit1)
self.texture1.setData(self.image1)
self.texture1.setMinMagFilters(QOpenGLTexture.Nearest,
QOpenGLTexture.Nearest)
self.texture1.setWrapMode(QOpenGLTexture.DirectionS,
QOpenGLTexture.Repeat)
self.texture1.setWrapMode(QOpenGLTexture.DirectionT,
QOpenGLTexture.Repeat)
# second texture
self.texture2 = QOpenGLTexture(QOpenGLTexture.Target2D)
self.texture2.create()
self.texture2.bind(self.texUnit2)
self.texture2.setData(self.image2)
self.texture2.setMinMagFilters(QOpenGLTexture.Linear,
QOpenGLTexture.Linear)
self.texture2.setWrapMode(QOpenGLTexture.DirectionS,
QOpenGLTexture.Repeat)
self.texture2.setWrapMode(QOpenGLTexture.DirectionT,
QOpenGLTexture.Repeat)
self.vbo.release()
vaoBinder = None
print("gl initialized")
def paintGL(self):
"drawing loop"
funcs = self.context.functions()
# clean up what was drawn
funcs.glClear(pygl.GL_COLOR_BUFFER_BIT | pygl.GL_DEPTH_BUFFER_BIT)
self.vao.bind()
self.vbo.bind()
# actual drawing
self.program.bind()
# set projection matrix
projectionMatrix = QMatrix4x4()
projectionMatrix.perspective(self.camera.zoom,
self.width() / self.height(), 0.2, 100.0)
self.program.setUniformValue('projection', projectionMatrix)
# set view/camera matrix
viewMatrix = self.camera.getViewMatrix()
self.program.setUniformValue('view', viewMatrix)
# bind textures
for i, pos in enumerate(self.cubeCoords):
#
cubeModel = QMatrix4x4()
cubeModel.translate(pos)
angle = 30 * i
cubeModel.rotate(angle, self.rotateVector)
self.program.setUniformValue("model", cubeModel)
self.texture1.bind(self.texUnit1)
self.texture2.bind(self.texUnit2)
funcs.glDrawArrays(pygl.GL_TRIANGLES, 0, 36)
self.vbo.release()
self.program.release()
self.texture1.release()
self.texture2.release()
class TriangleGL(QOpenGLWidget):
def __init__(self, parent=None):
QOpenGLWidget.__init__(self, parent)
# shaders etc
triangleTutoDir = os.path.dirname(__file__)
trianglePardir = os.path.join(triangleTutoDir, os.pardir)
mediaDir = os.path.join(trianglePardir, "media")
shaderDir = os.path.join(mediaDir, "shaders")
availableShaders = ["triangle", "triangle2"]
self.shaders = {
name: {
"fragment": os.path.join(shaderDir, name + ".frag"),
"vertex": os.path.join(shaderDir, name + ".vert")
} for name in availableShaders
}
self.core = "--coreprofile" in QCoreApplication.arguments()
# opengl data related
self.context = QOpenGLContext()
self.vao1 = QOpenGLVertexArrayObject()
self.vbo1 = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.vao2 = QOpenGLVertexArrayObject()
self.vbo2 = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.program1 = QOpenGLShaderProgram()
self.program2 = QOpenGLShaderProgram()
# some vertex data for corners of triangle
self.vertexData1 = np.array(
[0.9, 0.9, 0.0, # x, y, z
0.9, 0.7, 0.0, # x, y, z
0.7, 0.9, 0.0], # x, y, z
dtype=ctypes.c_float
)
self.vertexData2 = np.array(
[-0.9, -0.9, 0.0, # x, y, z
-0.9, -0.7, 0.0, # x, y, z
-0.7, -0.9, 0.0], # x, y, z
dtype=ctypes.c_float
)
# triangle color
self.triangleColor1 = QVector4D(1.0, 0.0, 0.0, 0.0) # yellow triangle
self.triangleColor2 = QVector4D(
0.0, 0.0, 0.5, 0.0) # not yellow triangle
def loadShader(self,
shaderName: str,
shaderType: str):
"Load shader"
shader = self.shaders[shaderName]
shaderSourcePath = shader[shaderType]
if shaderType == "vertex":
shader = QOpenGLShader(QOpenGLShader.Vertex)
else:
shader = QOpenGLShader(QOpenGLShader.Fragment)
#
isCompiled = shader.compileSourceFile(shaderSourcePath)
if isCompiled is False:
print(shader.log())
raise ValueError(
"{0} shader {2} known as {1} is not compiled".format(
shaderType, shaderName, shaderSourcePath
)
)
return shader
def loadVertexShader(self, shaderName: str):
"load vertex shader"
return self.loadShader(shaderName, "vertex")
def loadFragmentShader(self, shaderName: str):
"load fragment shader"
return self.loadShader(shaderName, "fragment")
def getGlInfo(self):
"Get opengl info"
info = """
Vendor: {0}
Renderer: {1}
OpenGL Version: {2}
Shader Version: {3}
""".format(
pygl.glGetString(pygl.GL_VENDOR),
pygl.glGetString(pygl.GL_RENDERER),
pygl.glGetString(pygl.GL_VERSION),
pygl.glGetString(pygl.GL_SHADING_LANGUAGE_VERSION)
)
return info
def initializeGL(self):
print('gl initial')
print(self.getGlInfo())
# create context and make it current
self.context.create()
self.context.aboutToBeDestroyed.connect(self.cleanUpGl)
# initialize functions
funcs = self.context.functions()
funcs.initializeOpenGLFunctions()
funcs.glClearColor(1, 1, 1, 1)
# deal with shaders
# first shader
shaderName = "triangle"
vshader = self.loadVertexShader(shaderName)
fshader = self.loadFragmentShader(shaderName)
# creating shader program
self.program1 = QOpenGLShaderProgram(self.context)
self.program1.addShader(vshader) # adding vertex shader
self.program1.addShader(fshader) # adding fragment shader
# bind attribute to a location
self.program1.bindAttributeLocation("aPos", 0)
# link shader program1
isLinked = self.program1.link()
print("shader program1 is linked: ", isLinked)
# bind the program1
self.program1.bind()
# specify uniform value
colorLoc = self.program1.uniformLocation("color")
self.program1.setUniformValue(colorLoc,
self.triangleColor1)
# second shader
shaderName = "triangle2"
vshader = self.loadVertexShader(shaderName)
fshader = self.loadFragmentShader(shaderName)
#
self.program2 = QOpenGLShaderProgram(self.context)
self.program2.addShader(vshader) # adding vertex shader
self.program2.addShader(fshader) # adding fragment shader
# bind attribute to a location
self.program2.bindAttributeLocation("aPos", 0)
# link shader program2
isLinked = self.program2.link()
print("shader program2 is linked: ", isLinked)
# bind the program2
self.program2.bind()
# specify uniform value
colorLoc = self.program2.uniformLocation("color")
self.program2.setUniformValue(colorLoc,
self.triangleColor2)
# self.useShader("triangle")
# deal with vao and vbo
# create vao and vbo
# vao
isVao = self.vao1.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao1)
# vbo
isVbo = self.vbo1.create()
isBound = self.vbo1.bind()
# check if vao and vbo are created
print('vao created: ', isVao)
print('vbo created: ', isVbo)
floatSize = ctypes.sizeof(ctypes.c_float)
# allocate space on buffer
self.vbo1.allocate(self.vertexData1.tobytes(),
floatSize * self.vertexData1.size)
funcs.glEnableVertexAttribArray(0)
nullptr = VoidPtr(0)
funcs.glVertexAttribPointer(0,
3,
int(pygl.GL_FLOAT),
int(pygl.GL_FALSE),
3 * floatSize,
nullptr)
self.vbo1.release()
vaoBinder = None
# second triangle vao vbo
# vao
isVao = self.vao2.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao2)
# vbo
isVbo = self.vbo2.create()
isBound = self.vbo2.bind()
# check if vao and vbo are created
print('vao created: ', isVao)
print('vbo created: ', isVbo)
floatSize = ctypes.sizeof(ctypes.c_float)
# allocate space on buffer
self.vbo2.allocate(self.vertexData2.tobytes(),
floatSize * self.vertexData2.size)
funcs.glEnableVertexAttribArray(0)
nullptr = VoidPtr(0)
funcs.glVertexAttribPointer(0,
3,
int(pygl.GL_FLOAT),
int(pygl.GL_FALSE),
3 * floatSize,
nullptr)
self.vbo2.release()
self.program2.release()
def cleanUpGl(self):
"Clean up everything"
self.context.makeCurrent()
self.vbo.destroy()
del self.program
self.program = None
self.doneCurrent()
def resizeGL(self, width: int, height: int):
"Resize the viewport"
funcs = self.context.functions()
funcs.glViewport(0, 0, width, height)
def paintGL(self):
"drawing loop"
funcs = self.context.functions()
# clean up what was drawn
funcs.glClear(pygl.GL_COLOR_BUFFER_BIT)
# actual drawing
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao1)
self.program1.bind()
funcs.glDrawArrays(pygl.GL_TRIANGLES, # mode
0, # first
3) # count
vaoBinder = None
self.program1.release()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao2)
self.program2.bind()
funcs.glDrawArrays(pygl.GL_TRIANGLES, # mode
0, # first
3) # count
vaoBinder = None
self.program2.release()
class TextureGL(QOpenGLWidget):
"Texture loading opengl widget"
def __init__(self, parent=None):
"Constructor"
QOpenGLWidget.__init__(self, parent)
tutoTutoDir = os.path.dirname(__file__)
tutoPardir = os.path.join(tutoTutoDir, os.pardir)
tutoPardir = os.path.realpath(tutoPardir)
mediaDir = os.path.join(tutoPardir, "media")
shaderDir = os.path.join(mediaDir, "shaders")
#
availableShaders = ["texture"]
self.shaders = {
name: {
"fragment": os.path.join(shaderDir, name + ".frag"),
"vertex": os.path.join(shaderDir, name + ".vert")
}
for name in availableShaders
}
imdir = os.path.join(mediaDir, "images")
imFName = "im"
imageFile = os.path.join(imdir, imFName + "0.png")
self.image = QImage(imageFile).mirrored()
self.core = "--coreprofile" in QCoreApplication.arguments()
# opengl data related
self.context = QOpenGLContext()
self.program = QOpenGLShaderProgram()
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.texture = None
self.indices = np.array(
[
0,
1,
3, # first triangle
1,
2,
3 # second triangle
],
dtype=ctypes.c_uint)
# vertex data of the panel that would hold the image
self.vertexData = np.array(
[
# viewport position || texture coords
0.5,
0.5,
0.0,
1.0,
1.0, # top right
0.5,
-0.5,
0.0,
1.0,
0.0, # bottom right
-0.5,
-0.5,
0.0,
0.0,
0.0, # bottom left
-0.5,
0.5,
0.0,
0.0,
1.0 # top left
],
dtype=ctypes.c_float)
def loadShader(self, shaderName: str, shaderType: str):
"Load shader"
shader = self.shaders[shaderName]
shaderSourcePath = shader[shaderType]
if shaderType == "vertex":
shader = QOpenGLShader(QOpenGLShader.Vertex)
else:
shader = QOpenGLShader(QOpenGLShader.Fragment)
#
isCompiled = shader.compileSourceFile(shaderSourcePath)
if isCompiled is False:
print(shader.log())
raise ValueError(
"{0} shader {2} known as {1} is not compiled".format(
shaderType, shaderName, shaderSourcePath))
return shader
def loadVertexShader(self, shaderName: str):
"load vertex shader"
return self.loadShader(shaderName, "vertex")
def loadFragmentShader(self, shaderName: str):
"load fragment shader"
return self.loadShader(shaderName, "fragment")
def getGlInfo(self):
"Get opengl info"
info = """
Vendor: {0}
Renderer: {1}
OpenGL Version: {2}
Shader Version: {3}
""".format(pygl.glGetString(pygl.GL_VENDOR),
pygl.glGetString(pygl.GL_RENDERER),
pygl.glGetString(pygl.GL_VERSION),
pygl.glGetString(pygl.GL_SHADING_LANGUAGE_VERSION))
return info
def cleanUpGl(self):
"Clean up everything"
self.context.makeCurrent()
del self.program
self.program = None
self.texture.release()
self.doneCurrent()
def resizeGL(self, width: int, height: int):
"Resize the viewport"
funcs = self.context.functions()
funcs.glViewport(0, 0, width, height)
def initializeGL(self):
"Initialize opengl "
print('gl initial')
print(self.getGlInfo())
# create context and make it current
self.context.create()
self.context.aboutToBeDestroyed.connect(self.cleanUpGl)
# initialize functions
funcs = self.context.functions()
funcs.initializeOpenGLFunctions()
funcs.glClearColor(1, 0, 1, 1)
# shader
shaderName = "texture"
vshader = self.loadVertexShader(shaderName)
fshader = self.loadFragmentShader(shaderName)
# create shader program
self.program = QOpenGLShaderProgram(self.context)
self.program.addShader(vshader)
self.program.addShader(fshader)
# bind attribute location
self.program.bindAttributeLocation("aPos", 0)
self.program.bindAttributeLocation("aTexCoord", 1)
# link shader program
isLinked = self.program.link()
print("shader program is linked: ", isLinked)
# activate shader program to set uniform an attribute values
self.program.bind()
self.program.setUniformValue('myTexture', 0)
# vbo
isVbo = self.vbo.create()
isVboBound = self.vbo.bind()
floatSize = ctypes.sizeof(ctypes.c_float)
# allocate vbo
self.vbo.allocate(self.vertexData.tobytes(),
floatSize * self.vertexData.size)
# texture new school
self.texture = QOpenGLTexture(QOpenGLTexture.Target2D)
self.texture.create()
# new school
self.texture.bind()
self.texture.setData(self.image)
self.texture.setMinMagFilters(QOpenGLTexture.Linear,
QOpenGLTexture.Linear)
self.texture.setWrapMode(QOpenGLTexture.DirectionS,
QOpenGLTexture.Repeat)
self.texture.setWrapMode(QOpenGLTexture.DirectionT,
QOpenGLTexture.Repeat)
def paintGL(self):
"paint gl"
funcs = self.context.functions()
# clean up what was drawn
funcs.glClear(pygl.GL_COLOR_BUFFER_BIT)
self.program.bind()
self.program.enableAttributeArray(0)
self.program.enableAttributeArray(1)
floatSize = ctypes.sizeof(ctypes.c_float)
# set attribute values
self.program.setAttributeBuffer(
0, # viewport position
pygl.GL_FLOAT, # coord type
0, # offset
3,
5 * floatSize)
self.program.setAttributeBuffer(
1, # viewport position
pygl.GL_FLOAT, # coord type
3 * floatSize, # offset
2,
5 * floatSize)
# bind texture
self.texture.bind()
funcs.glDrawElements(pygl.GL_TRIANGLES, self.indices.size,
pygl.GL_UNSIGNED_INT, self.indices.tobytes())
class RectangleGL(QOpenGLWidget):
"Texture loading opengl widget"
def __init__(self, parent=None):
"Constructor"
QOpenGLWidget.__init__(self, parent)
tutoTutoDir = os.path.dirname(__file__)
tutoPardir = os.path.join(tutoTutoDir, os.pardir)
tutoPardir = os.path.realpath(tutoPardir)
mediaDir = os.path.join(tutoPardir, "media")
shaderDir = os.path.join(mediaDir, "shaders")
#
availableShaders = ["rectangle", "triangle"]
self.shaders = {
name: {
"fragment": os.path.join(shaderDir, name + ".frag"),
"vertex": os.path.join(shaderDir, name + ".vert")
}
for name in availableShaders
}
self.core = "--coreprofile" in QCoreApplication.arguments()
# opengl data related
self.context = QOpenGLContext()
self.program = QOpenGLShaderProgram()
self.vao = QOpenGLVertexArrayObject()
self.vbo = QOpenGLBuffer(QOpenGLBuffer.VertexBuffer)
self.indices = np.array(
[
0,
1,
3, # first triangle
1,
2,
3 # second triangle
],
dtype=ctypes.c_uint)
# vertex data of the panel that would hold the image
self.vertexData = np.array(
[
# viewport position || colors || texture coords
0.5,
0.5,
0.0, # top right
0.5,
-0.5,
0.0, # bottom right
-0.5,
-0.5,
0.0, # bottom left
-0.5,
0.5,
0.0, # top left
],
dtype=ctypes.c_float)
self.rectColor = QVector4D(0.0, 1.0, 1.0, 0.0)
def loadShader(self, shaderName: str, shaderType: str):
"Load shader"
shader = self.shaders[shaderName]
shaderSourcePath = shader[shaderType]
if shaderType == "vertex":
shader = QOpenGLShader(QOpenGLShader.Vertex)
else:
shader = QOpenGLShader(QOpenGLShader.Fragment)
#
isCompiled = shader.compileSourceFile(shaderSourcePath)
if isCompiled is False:
print(shader.log())
raise ValueError(
"{0} shader {2} known as {1} is not compiled".format(
shaderType, shaderName, shaderSourcePath))
return shader
def loadVertexShader(self, shaderName: str):
"load vertex shader"
return self.loadShader(shaderName, "vertex")
def loadFragmentShader(self, shaderName: str):
"load fragment shader"
return self.loadShader(shaderName, "fragment")
def getGlInfo(self):
"Get opengl info"
info = """
Vendor: {0}
Renderer: {1}
OpenGL Version: {2}
Shader Version: {3}
""".format(pygl.glGetString(pygl.GL_VENDOR),
pygl.glGetString(pygl.GL_RENDERER),
pygl.glGetString(pygl.GL_VERSION),
pygl.glGetString(pygl.GL_SHADING_LANGUAGE_VERSION))
return info
def cleanUpGl(self):
"Clean up everything"
self.context.makeCurrent()
del self.program
self.program = None
self.vbo.release()
self.doneCurrent()
def resizeGL(self, width: int, height: int):
"Resize the viewport"
funcs = self.context.functions()
funcs.glViewport(0, 0, width, height)
def initializeGL(self):
"Initialize opengl "
print('gl initial')
print(self.getGlInfo())
# create context and make it current
self.context.create()
self.context.aboutToBeDestroyed.connect(self.cleanUpGl)
# initialize functions
funcs = self.context.functions()
funcs.initializeOpenGLFunctions()
funcs.glClearColor(1, 1, 1, 1)
# shader
shaderName = "triangle"
vshader = self.loadVertexShader(shaderName)
fshader = self.loadFragmentShader(shaderName)
# create shader program
self.program = QOpenGLShaderProgram(self.context)
self.program.addShader(vshader)
self.program.addShader(fshader)
# bind attribute location
self.program.bindAttributeLocation("aPos", 0)
# link shader program
isLinked = self.program.link()
print("shader program is linked: ", isLinked)
# activate shader program to set uniform an attribute values
self.program.bind()
# specify uniform value
colorLoc = self.program.uniformLocation("color")
self.program.setUniformValue(colorLoc, self.rectColor)
# vao, vbo, texture
# vao
isVao = self.vao.create()
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
# vbo
isVbo = self.vbo.create()
isVboBound = self.vbo.bind()
floatSize = ctypes.sizeof(ctypes.c_float)
# allocate vbo
self.vbo.allocate(self.vertexData.tobytes(),
floatSize * self.vertexData.size)
print("vao created: ", isVao)
print("vbo created: ", isVbo)
print("vbo bound: ", isVboBound)
# dealing with attributes
# vertex array position
funcs.glVertexAttribPointer(0, 3, int(pygl.GL_FLOAT),
int(pygl.GL_FALSE), 3 * floatSize,
VoidPtr(0))
funcs.glEnableVertexAttribArray(0)
self.vbo.release()
vaoBinder = None
def paintGL(self):
"paint gl"
funcs = self.context.functions()
# clean up what was drawn
funcs.glClear(pygl.GL_COLOR_BUFFER_BIT)
# bind texture
vaoBinder = QOpenGLVertexArrayObject.Binder(self.vao)
self.program.bind()
# draw stuff
funcs.glDrawElements(pygl.GL_TRIANGLES, self.indices.size,
pygl.GL_UNSIGNED_INT, self.indices.tobytes())
# VoidPtr(self.indices.tobytes() * ctypes.sizeof(ctypes.c_uint)))
vaoBinder = None
self.program.release()
