void ImGui_Wrapper::initGui()
{
createFontsTexture();
const GLchar *vertex_shader =
"#version 330\n"
"uniform mat4 ProjMtx;\n"
"layout (location = 0) in vec2 Position;\n"
"layout (location = 1) in vec2 UV;\n"
"layout (location = 2) in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader =
"#version 330\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture( Texture, Frag_UV.st);\n"
"}\n";
m_shader.addShaderFromMemory(graphics::ShaderType::Vertex, vertex_shader);
m_shader.addShaderFromMemory(graphics::ShaderType::Fragment, fragment_shader);
m_shader.link();
m_locationTex = m_shader.uniformLocation("Texture");
m_locationProjMtx = m_shader.uniformLocation("ProjMtx");
m_VAO.create();
m_VAO.bind();
m_VBO.create(graphics::BufferType::ArrayBuffer, graphics::BufferUsage::StreamDraw);
m_VBO.bind();
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)offsetof(ImDrawVert, pos));
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)offsetof(ImDrawVert, uv));
glEnableVertexAttribArray(1);
glVertexAttribPointer(2, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)offsetof(ImDrawVert, col));
glEnableVertexAttribArray(2);
m_EBO.create(graphics::BufferType::ElementArrayBuffer, graphics::BufferUsage::StreamDraw);
m_EBO.bind();
m_VAO.release();
m_lastTime = high_resolution_clock::now();
}
bool ImGuiRenderer::createDeviceObjects()
{
// Backup GL state
GLint last_texture, last_array_buffer, last_vertex_array;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
ngl::ShaderLib *shader=ngl::ShaderLib::instance();
shader->loadShader(ImGUIShader,"shaders/imguiVertex.glsl","shaders/imguiFragment.glsl");
createFontsTexture();
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
glBindVertexArray(last_vertex_array);
return true;
}
bool ImGuiRenderer::createDeviceObjects()
{
// Backup GL state
GLint last_texture, last_array_buffer, last_vertex_array;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
const GLchar *vertex_shader =
"#version 330\n"
"uniform mat4 ProjMtx;\n"
"in vec2 Position;\n"
"in vec2 UV;\n"
"in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader =
"#version 330\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture( Texture, Frag_UV.st);\n"
"}\n";
g_ShaderHandle = glCreateProgram();
g_VertHandle = glCreateShader(GL_VERTEX_SHADER);
g_FragHandle = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(g_VertHandle, 1, &vertex_shader, 0);
glShaderSource(g_FragHandle, 1, &fragment_shader, 0);
glCompileShader(g_VertHandle);
glCompileShader(g_FragHandle);
glAttachShader(g_ShaderHandle, g_VertHandle);
glAttachShader(g_ShaderHandle, g_FragHandle);
glLinkProgram(g_ShaderHandle);
g_AttribLocationTex = glGetUniformLocation(g_ShaderHandle, "Texture");
g_AttribLocationProjMtx = glGetUniformLocation(g_ShaderHandle, "ProjMtx");
g_AttribLocationPosition = glGetAttribLocation(g_ShaderHandle, "Position");
g_AttribLocationUV = glGetAttribLocation(g_ShaderHandle, "UV");
g_AttribLocationColor = glGetAttribLocation(g_ShaderHandle, "Color");
glGenBuffers(1, &g_VboHandle);
glGenBuffers(1, &g_ElementsHandle);
glGenVertexArrays(1, &g_VaoHandle);
glBindVertexArray(g_VaoHandle);
glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
glEnableVertexAttribArray(g_AttribLocationPosition);
glEnableVertexAttribArray(g_AttribLocationUV);
glEnableVertexAttribArray(g_AttribLocationColor);
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
glVertexAttribPointer(g_AttribLocationPosition, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, pos));
glVertexAttribPointer(g_AttribLocationUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, uv));
glVertexAttribPointer(g_AttribLocationColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, col));
#undef OFFSETOF
createFontsTexture();
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
glBindVertexArray(last_vertex_array);
return true;
}
bool HUD::createDevices()
{
// Build texture atlas
ImGuiIO& io = ImGui::GetIO();
// Backup GL state
GLint last_texture, last_array_buffer, last_vertex_array;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
CheckOpenGLError("Get state", 313);
g_shaderHandle = glCreateProgram();
g_vertHandle = glCreateShader(GL_VERTEX_SHADER);
g_fragHandle = glCreateShader(GL_FRAGMENT_SHADER);
//glShaderSource(g_vertHandle, 1, &vertex_shader, 0);
//lShaderSource(g_fragHandle, 1, &fragment_shader, 0);
glCompileShader(g_vertHandle);
glCompileShader(g_fragHandle);
CheckOpenGLError("Shader compile", 348);
glAttachShader(g_shaderHandle, g_vertHandle);
glAttachShader(g_shaderHandle, g_fragHandle);
glLinkProgram(g_shaderHandle);
GLint status;
glGetProgramiv(g_shaderHandle, GL_LINK_STATUS, &status);
if( status == GL_FALSE) printf("Program did not link\n");
CheckOpenGLError("Program link", 352);
g_attribLocationTex = glGetUniformLocation(g_shaderHandle, "Texture");
g_attribLocationProjMtx = glGetUniformLocation(g_shaderHandle, "ProjMtx");
g_attribLocationPosition = glGetAttribLocation(g_shaderHandle, "Position");
g_attribLocationUV = glGetAttribLocation(g_shaderHandle, "UV");
g_attribLocationColor = glGetAttribLocation(g_shaderHandle, "Color");
CheckOpenGLError("Unis and attribs", 359);
glGenBuffers(1, &g_vboHandle);
glGenBuffers(1, &g_elementsHandle);
glGenVertexArraysAPPLE(1, &g_vaoHandle);
glBindVertexArrayAPPLE(g_vaoHandle);
CheckOpenGLError("Bind VAO", 343);
glBindBuffer(GL_ARRAY_BUFFER, g_vboHandle);
glEnableVertexAttribArray(g_attribLocationPosition);
glEnableVertexAttribArray(g_attribLocationUV);
glEnableVertexAttribArray(g_attribLocationColor);
CheckOpenGLError("Enable Attrib Arrays", 343);
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
glVertexAttribPointer(g_attribLocationPosition, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, pos));
glVertexAttribPointer(g_attribLocationUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, uv));
glVertexAttribPointer(g_attribLocationColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)OFFSETOF(ImDrawVert, col));
CheckOpenGLError("Attrib pointer", 377);
#undef OFFSETOF
createFontsTexture();
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
glBindVertexArrayAPPLE(last_vertex_array);
return true;
}