void Style::onBeginDrawFrame(RenderState& rs, const View& _view, Scene& _scene) {
// Reset the currently used texture unit to 0
rs.resetTextureUnit();
// Set time uniforms style's shader programs
m_shaderProgram->setUniformf(rs, m_uTime, _scene.time());
m_shaderProgram->setUniformf(rs, m_uDevicePixelRatio, m_pixelScale);
if (m_material.uniforms) {
m_material.material->setupProgram(rs, *m_material.uniforms);
}
// Set up lights
for (const auto& light : m_lights) {
light.light->setupProgram(rs, _view, *light.uniforms);
}
// Set Map Position
m_shaderProgram->setUniformf(rs, m_uResolution, _view.getWidth(), _view.getHeight());
const auto& mapPos = _view.getPosition();
m_shaderProgram->setUniformf(rs, m_uMapPosition, mapPos.x, mapPos.y, _view.getZoom());
m_shaderProgram->setUniformMatrix3f(rs, m_uNormalMatrix, _view.getNormalMatrix());
m_shaderProgram->setUniformMatrix3f(rs, m_uInverseNormalMatrix, _view.getInverseNormalMatrix());
m_shaderProgram->setUniformf(rs, m_uMetersPerPixel, 1.0 / _view.pixelsPerMeter());
m_shaderProgram->setUniformMatrix4f(rs, m_uView, _view.getViewMatrix());
m_shaderProgram->setUniformMatrix4f(rs, m_uProj, _view.getProjectionMatrix());
setupShaderUniforms(rs, _scene);
// Configure render state
switch (m_blend) {
case Blending::none:
rs.blending(GL_FALSE);
rs.blendingFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
rs.depthTest(GL_TRUE);
rs.depthMask(GL_TRUE);
break;
case Blending::add:
rs.blending(GL_TRUE);
rs.blendingFunc(GL_ONE, GL_ONE);
rs.depthTest(GL_FALSE);
rs.depthMask(GL_TRUE);
break;
case Blending::multiply:
rs.blending(GL_TRUE);
rs.blendingFunc(GL_ZERO, GL_SRC_COLOR);
rs.depthTest(GL_FALSE);
rs.depthMask(GL_TRUE);
break;
case Blending::overlay:
rs.blending(GL_TRUE);
rs.blendingFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
rs.depthTest(GL_FALSE);
rs.depthMask(GL_FALSE);
break;
case Blending::inlay:
// TODO: inlay does not behave correctly for labels because they don't have a z position
rs.blending(GL_TRUE);
rs.blendingFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
rs.depthTest(GL_TRUE);
rs.depthMask(GL_FALSE);
break;
default:
break;
}
}
void Style::onBeginDrawFrame(const View& _view, Scene& _scene, int _textureUnit) {
bool contextLost = glContextLost();
// Setup constant uniforms
if (contextLost) {
m_shaderProgram->setUniformf("u_device_pixel_ratio", m_pixelScale);
}
m_material->setupProgram(*m_shaderProgram);
// Set up lights
for (const auto& light : _scene.lights()) {
light->setupProgram(_view, *m_shaderProgram);
}
// Set Map Position
if (m_dirtyViewport) {
m_shaderProgram->setUniformf("u_resolution", _view.getWidth(), _view.getHeight());
}
const auto& mapPos = _view.getPosition();
m_shaderProgram->setUniformf("u_map_position", mapPos.x, mapPos.y, _view.getZoom());
m_shaderProgram->setUniformMatrix3f("u_normalMatrix", glm::value_ptr(_view.getNormalMatrix()));
m_shaderProgram->setUniformMatrix3f("u_inverseNormalMatrix", glm::value_ptr(glm::inverse(_view.getNormalMatrix())));
m_shaderProgram->setUniformf("u_meters_per_pixel", 1.0 / _view.pixelsPerMeter());
m_shaderProgram->setUniformMatrix4f("u_view", glm::value_ptr(_view.getViewMatrix()));
m_shaderProgram->setUniformMatrix4f("u_proj", glm::value_ptr(_view.getProjectionMatrix()));
setupShaderUniforms(_textureUnit, contextLost, _scene);
// Configure render state
switch (m_blend) {
case Blending::none:
RenderState::blending(GL_FALSE);
RenderState::blendingFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
RenderState::depthTest(GL_TRUE);
RenderState::depthWrite(GL_TRUE);
break;
case Blending::add:
RenderState::blending(GL_TRUE);
RenderState::blendingFunc(GL_ONE, GL_ONE);
RenderState::depthTest(GL_FALSE);
RenderState::depthWrite(GL_TRUE);
break;
case Blending::multiply:
RenderState::blending(GL_TRUE);
RenderState::blendingFunc(GL_ZERO, GL_SRC_COLOR);
RenderState::depthTest(GL_FALSE);
RenderState::depthWrite(GL_TRUE);
break;
case Blending::overlay:
RenderState::blending(GL_TRUE);
RenderState::blendingFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
RenderState::depthTest(GL_FALSE);
RenderState::depthWrite(GL_FALSE);
break;
case Blending::inlay:
// TODO: inlay does not behave correctly for labels because they don't have a z position
RenderState::blending(GL_TRUE);
RenderState::blendingFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
RenderState::depthTest(GL_TRUE);
RenderState::depthWrite(GL_FALSE);
break;
default:
break;
}
}
