Ejemplos de ImGui_ImplGlfwGL3_CreateFontsTexture en C++ (Cpp)

Ejemplo n.º 1

Archivo: imgui_impl_glfw_gl3.cpp Proyecto: Narthe/3D-engine

bool ImGui_ImplGlfwGL3_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

    ImGui_ImplGlfwGL3_CreateFontsTexture();

    // Restore modified GL state
    glBindTexture(GL_TEXTURE_2D, last_texture);
    glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
    glBindVertexArray(last_vertex_array);

    return true;
}

Ejemplo n.º 2

Archivo: imgui_impl_opengl3.cpp Proyecto: altseed/Altseed

bool ImGui_ImplGlfwGL3_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 =
		"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 =
		"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";

	const GLchar* vertex_shader_with_version[2] = { g_GlslVersion, vertex_shader };
	const GLchar* fragment_shader_with_version[2] = { g_GlslVersion, fragment_shader };

	g_ShaderHandle = glCreateProgram();
	g_VertHandle = glCreateShader(GL_VERTEX_SHADER);
	g_FragHandle = glCreateShader(GL_FRAGMENT_SHADER);
	glShaderSource(g_VertHandle, 2, vertex_shader_with_version, NULL);
	glShaderSource(g_FragHandle, 2, fragment_shader_with_version, NULL);
	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);

	ImGui_ImplGlfwGL3_CreateFontsTexture();

	// Restore modified GL state
	glBindTexture(GL_TEXTURE_2D, last_texture);
	glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
	glBindVertexArray(last_vertex_array);

	return true;
}