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LibGL: Implement very basic version of glGetFloatv
This is a very basic implementation of glGetfloatv. It will only give a result when used with GL_MODELVIEW_MATRIX. In the future we can update and extend it's functionality.
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5 changed files with 43 additions and 0 deletions
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@ -1291,6 +1291,38 @@ void SoftwareGLContext::gl_active_texture(GLenum texture)
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m_active_texture_unit = &m_texture_units.at(texture - GL_TEXTURE0);
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}
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void SoftwareGLContext::gl_get_floatv(GLenum pname, GLfloat* params)
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{
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RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
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auto flatten_and_assign_matrix = [¶ms](const FloatMatrix4x4& matrix) {
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auto elements = matrix.elements();
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for (size_t i = 0; i < 4; ++i) {
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for (size_t j = 0; j < 4; ++j) {
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params[i * 4 + j] = elements[i][j];
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}
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}
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};
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switch (pname) {
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case GL_MODELVIEW_MATRIX:
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if (m_current_matrix_mode == GL_MODELVIEW)
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flatten_and_assign_matrix(m_model_view_matrix);
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else {
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if (m_model_view_matrix_stack.is_empty())
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flatten_and_assign_matrix(FloatMatrix4x4::identity());
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else
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flatten_and_assign_matrix(m_model_view_matrix_stack.last());
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}
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break;
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default:
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// FIXME: Because glQuake only requires GL_MODELVIEW_MATRIX, that is the only parameter
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// that we currently support. More parameters should be supported.
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TODO();
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}
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}
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void SoftwareGLContext::present()
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{
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m_rasterizer.blit_to(*m_frontbuffer);
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