def init_gl(self, glcontext):
assert not self.shader
assert glcontext == self.glcontext
frag_stage = GstGL.GLSLStage.new_default_fragment(self.glcontext)
vert_stage = GstGL.GLSLStage.new_with_string(
self.glcontext, GL_VERTEX_SHADER, GstGL.GLSLVersion.NONE,
GstGL.GLSLProfile.COMPATIBILITY | GstGL.GLSLProfile.ES,
VERTEX_SHADER_SRC)
self.shader = GstGL.GLShader.new(self.glcontext)
self.shader.compile_attach_stage(vert_stage)
self.shader.compile_attach_stage(frag_stage)
self.shader.link()
self.u_transformation = glGetUniformLocation.wrappedOperation(
self.shader.get_program_handle(), 'u_transformation')
a_position = self.shader.get_attribute_location('a_position')
a_texcoord = self.shader.get_attribute_location('a_texcoord')
self.vao = glGenVertexArrays(1)
glBindVertexArray(self.vao)
self.positions_buffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.positions_buffer)
glBufferData(GL_ARRAY_BUFFER, ArrayDatatype.arrayByteCount(POSITIONS),
POSITIONS, GL_STATIC_DRAW)
self.texcoords_buffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.texcoords_buffer)
glBufferData(GL_ARRAY_BUFFER, ArrayDatatype.arrayByteCount(TEXCOORDS),
TEXCOORDS, GL_STATIC_DRAW)
self.vbo_indices = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.vbo_indices)
glBufferData(GL_ARRAY_BUFFER, ArrayDatatype.arrayByteCount(INDICES),
INDICES, GL_STATIC_DRAW)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self.vbo_indices)
glBindBuffer(GL_ARRAY_BUFFER, self.positions_buffer)
glVertexAttribPointer.wrappedOperation(a_position, 2, GL_FLOAT,
GL_FALSE, 0, None)
glBindBuffer(GL_ARRAY_BUFFER, self.texcoords_buffer)
glVertexAttribPointer.wrappedOperation(a_texcoord, 2, GL_FLOAT,
GL_FALSE, 0, None)
glEnableVertexAttribArray(a_position)
glEnableVertexAttribArray(a_texcoord)
glBindVertexArray(0)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
glBindBuffer(GL_ARRAY_BUFFER, 0)
def do_gl_start(self):
frag_stage = GstGL.GLSLStage.new_default_fragment(self.context)
vert_stage = GstGL.GLSLStage.new_with_string(self.context,
GL_VERTEX_SHADER,
GstGL.GLSLVersion.NONE,
GstGL.GLSLProfile.COMPATIBILITY | GstGL.GLSLProfile.ES,
VERTEX_SHADER)
self.shader = GstGL.GLShader.new(self.context)
self.shader.compile_attach_stage(vert_stage)
self.shader.compile_attach_stage(frag_stage)
self.shader.link()
a_position = self.shader.get_attribute_location('a_position')
a_texcoord = self.shader.get_attribute_location('a_texcoord')
self.vao_id = glGenVertexArrays(1)
glBindVertexArray(self.vao_id)
self.positions_buffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.positions_buffer)
glBufferData(GL_ARRAY_BUFFER, ArrayDatatype.arrayByteCount(POSITIONS), POSITIONS, GL_STATIC_DRAW)
self.texcoords_buffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.texcoords_buffer)
glBufferData(GL_ARRAY_BUFFER, ArrayDatatype.arrayByteCount(TEXCOORDS), TEXCOORDS, GL_STATIC_DRAW)
self.vbo_indices_buffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.vbo_indices_buffer)
glBufferData(GL_ARRAY_BUFFER, ArrayDatatype.arrayByteCount(INDICES), INDICES, GL_STATIC_DRAW)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self.vbo_indices_buffer);
glBindBuffer(GL_ARRAY_BUFFER, self.positions_buffer);
glVertexAttribPointer.wrappedOperation(a_position, 2, GL_FLOAT, GL_FALSE, 0, None)
glBindBuffer(GL_ARRAY_BUFFER, self.texcoords_buffer);
glVertexAttribPointer.wrappedOperation(a_texcoord, 2, GL_FLOAT, GL_FALSE, 0, None)
glEnableVertexAttribArray(a_position)
glEnableVertexAttribArray(a_texcoord)
glBindVertexArray(0)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
glBindBuffer(GL_ARRAY_BUFFER, 0)
return True
def init_gl(self, glcontext):
#TODO deinit at some point
assert not self.glcontext
vert_stage = GstGL.GLSLStage.new_default_vertex(glcontext)
frag_stage = GstGL.GLSLStage.new_with_string(
glcontext, GL_FRAGMENT_SHADER, GstGL.GLSLVersion.NONE,
GstGL.GLSLProfile.COMPATIBILITY | GstGL.GLSLProfile.ES,
FRAGMENT_SHADER_SRC)
self.hm_shader = GstGL.GLShader.new(glcontext)
self.hm_shader.compile_attach_stage(vert_stage)
self.hm_shader.compile_attach_stage(frag_stage)
self.hm_shader.link()
self.default_shader = GstGL.GLShader.new_default(glcontext)
a_position = self.default_shader.get_attribute_location('a_position')
a_texcoord = self.default_shader.get_attribute_location('a_texcoord')
self.vao_id = glGenVertexArrays(1)
glBindVertexArray(self.vao_id)
self.positions_buffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.positions_buffer)
glBufferData(GL_ARRAY_BUFFER, ArrayDatatype.arrayByteCount(POSITIONS),
POSITIONS, GL_STATIC_DRAW)
self.texcoords_buffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.texcoords_buffer)
glBufferData(GL_ARRAY_BUFFER, ArrayDatatype.arrayByteCount(TEXCOORDS),
TEXCOORDS, GL_STATIC_DRAW)
self.vbo_indices_buffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.vbo_indices_buffer)
glBufferData(GL_ARRAY_BUFFER, ArrayDatatype.arrayByteCount(INDICES),
INDICES, GL_STATIC_DRAW)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self.vbo_indices_buffer)
glBindBuffer(GL_ARRAY_BUFFER, self.positions_buffer)
glVertexAttribPointer.baseFunction(a_position, 2, GL_FLOAT, GL_FALSE,
0, None)
glBindBuffer(GL_ARRAY_BUFFER, self.texcoords_buffer)
glVertexAttribPointer.baseFunction(a_texcoord, 2, GL_FLOAT, GL_FALSE,
0, None)
glEnableVertexAttribArray(a_position)
glEnableVertexAttribArray(a_texcoord)
glBindVertexArray(0)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)
glBindBuffer(GL_ARRAY_BUFFER, 0)
hm_w, hm_h = self.get_heatmap_texture_size()
texture_ids = glGenTextures(1)
self.hm_tex_id = texture_ids
glActiveTexture(GL_TEXTURE0 + 1)
glBindTexture(GL_TEXTURE_2D, self.hm_tex_id)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)
glPixelStorei(GL_UNPACK_ALIGNMENT, 1)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, hm_w, hm_h, 0, GL_RGBA,
GL_FLOAT, None)
self.glcontext = glcontext