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#include "drape/debug_rect_renderer.hpp"
#include "drape/gpu_program_manager.hpp"
#include "drape/glfunctions.hpp"
#include "drape/shader_def.hpp"
namespace dp
{
namespace
{
m2::PointF PixelPointToScreenSpace(ScreenBase const & screen, m2::PointF const & pt)
{
float const szX = static_cast<float>(screen.isPerspective() ? screen.PixelRectIn3d().SizeX() :
screen.PixelRect().SizeX());
float const szY = static_cast<float>(screen.isPerspective() ? screen.PixelRectIn3d().SizeY() :
screen.PixelRect().SizeY());
return m2::PointF(pt.x / szX - 0.5f, -pt.y / szY + 0.5f) * 2.0f;
}
}
DebugRectRenderer & DebugRectRenderer::Instance()
{
static DebugRectRenderer renderer;
return renderer;
}
DebugRectRenderer::DebugRectRenderer()
: m_VAO(0)
, m_vertexBuffer(0)
, m_isEnabled(true)
{
}
DebugRectRenderer::~DebugRectRenderer()
{
ASSERT_EQUAL(m_VAO, 0, ());
ASSERT_EQUAL(m_vertexBuffer, 0, ());
}
void DebugRectRenderer::Init(ref_ptr<dp::GpuProgramManager> mng)
{
m_vertexBuffer = GLFunctions::glGenBuffer();
GLFunctions::glBindBuffer(m_vertexBuffer, gl_const::GLArrayBuffer);
m_VAO = GLFunctions::glGenVertexArray();
GLFunctions::glBindVertexArray(m_VAO);
m_program = mng->GetProgram(gpu::DEBUG_RECT_PROGRAM);
int8_t attributeLocation = m_program->GetAttributeLocation("a_position");
ASSERT_NOT_EQUAL(attributeLocation, -1, ());
GLFunctions::glEnableVertexAttribute(attributeLocation);
GLFunctions::glVertexAttributePointer(attributeLocation, 2, gl_const::GLFloatType, false, sizeof(float) * 2, 0);
GLFunctions::glBindBuffer(0, gl_const::GLArrayBuffer);
GLFunctions::glBindVertexArray(0);
}
void DebugRectRenderer::Destroy()
{
if (m_vertexBuffer != 0)
{
GLFunctions::glDeleteBuffer(m_vertexBuffer);
m_vertexBuffer = 0;
}
if (m_VAO != 0)
{
GLFunctions::glDeleteVertexArray(m_VAO);
m_VAO = 0;
}
m_program = nullptr;
}
bool DebugRectRenderer::IsEnabled() const
{
return m_isEnabled;
}
void DebugRectRenderer::SetEnabled(bool enabled)
{
m_isEnabled = enabled;
}
void DebugRectRenderer::DrawRect(ScreenBase const & screen, m2::RectF const & rect, dp::Color const & color) const
{
if (!m_isEnabled)
return;
ASSERT(m_program != nullptr, ());
m_program->Bind();
GLFunctions::glBindBuffer(m_vertexBuffer, gl_const::GLArrayBuffer);
GLFunctions::glBindVertexArray(m_VAO);
GLFunctions::glDisable(gl_const::GLDepthTest);
array<m2::PointF, 5> vertices;
vertices[0] = PixelPointToScreenSpace(screen, rect.LeftBottom());
vertices[1] = PixelPointToScreenSpace(screen, rect.LeftTop());
vertices[2] = PixelPointToScreenSpace(screen, rect.RightTop());
vertices[3] = PixelPointToScreenSpace(screen, rect.RightBottom());
vertices[4] = vertices[0];
GLFunctions::glBufferData(gl_const::GLArrayBuffer, vertices.size() * sizeof(vertices[0]),
vertices.data(), gl_const::GLStaticDraw);
int8_t const location = m_program->GetUniformLocation("u_color");
if (location >= 0)
GLFunctions::glUniformValuef(location, color.GetRedF(), color.GetGreenF(), color.GetBlueF(), color.GetAlfaF());
GLFunctions::glDrawArrays(gl_const::GLLineStrip, 0, vertices.size());
GLFunctions::glEnable(gl_const::GLDepthTest);
GLFunctions::glBindBuffer(0, gl_const::GLArrayBuffer);
GLFunctions::glBindVertexArray(0);
m_program->Unbind();
}
#ifdef COLLECT_DISPLACEMENT_INFO
void DebugRectRenderer::DrawArrow(ScreenBase const & screen, OverlayTree::DisplacementData const & data) const
{
if (!m_isEnabled)
return;
if (data.m_arrowStart.EqualDxDy(data.m_arrowEnd, 1e-5))
return;
ASSERT(m_program != nullptr, ());
m_program->Bind();
GLFunctions::glBindBuffer(m_vertexBuffer, gl_const::GLArrayBuffer);
GLFunctions::glBindVertexArray(m_VAO);
GLFunctions::glDisable(gl_const::GLDepthTest);
array<m2::PointF, 5> vertices;
m2::PointF const dir = (data.m_arrowEnd - data.m_arrowStart).Normalize();
m2::PointF const side = m2::PointF(-dir.y, dir.x);
vertices[0] = PixelPointToScreenSpace(screen, data.m_arrowStart);
vertices[1] = PixelPointToScreenSpace(screen, data.m_arrowEnd);
vertices[2] = PixelPointToScreenSpace(screen, data.m_arrowEnd - dir * 20 + side * 10);
vertices[3] = vertices[1];
vertices[4] = PixelPointToScreenSpace(screen, data.m_arrowEnd - dir * 20 - side * 10);
GLFunctions::glBufferData(gl_const::GLArrayBuffer, vertices.size() * sizeof(vertices[0]),
vertices.data(), gl_const::GLStaticDraw);
int8_t const location = m_program->GetUniformLocation("u_color");
if (location >= 0)
GLFunctions::glUniformValuef(location, data.m_arrowColor.GetRedF(), data.m_arrowColor.GetGreenF(),
data.m_arrowColor.GetBlueF(), data.m_arrowColor.GetAlfaF());
GLFunctions::glDrawArrays(gl_const::GLLineStrip, 0, vertices.size());
GLFunctions::glEnable(gl_const::GLDepthTest);
GLFunctions::glBindBuffer(0, gl_const::GLArrayBuffer);
GLFunctions::glBindVertexArray(0);
m_program->Unbind();
}
#endif
} // namespace dp
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