109 lines
2.2 KiB
D
109 lines
2.2 KiB
D
/// License: MIT
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module sj.TextProgram;
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import gl4d;
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///
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class TextProgram {
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public:
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///
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static struct Vertex {
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public:
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///
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align(1) vec3 pos;
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///
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align(1) vec2 uv;
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}
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///
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enum ShaderHeader = "#version 330 core
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#extension GL_ARB_explicit_uniform_location : enable";
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///
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enum VertexShaderSrc = ShaderHeader ~ q{
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layout(location = 0) uniform mat4 P;
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layout(location = 1) uniform mat4 V;
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layout(location = 2) uniform mat4 M;
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layout(location = 0) in vec3 vert;
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layout(location = 1) in vec2 uv;
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out vec2 uv_;
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void main() {
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uv_ = uv;
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gl_Position = P * V * M * vec4(vert, 1);
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}
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};
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///
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enum FragmentShaderSrc = ShaderHeader ~ q{
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layout(location = 3) uniform sampler2D tex;
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layout(location = 4) uniform vec4 color;
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in vec2 uv_;
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out vec4 pixel_;
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void main() {
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pixel_ = color;
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pixel_.a *= texture(tex, uv_).r;
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}
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};
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///
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this() {
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ProgramLinker linker;
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linker.vertex = VertexShader.Compile(VertexShaderSrc);
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linker.fragment = FragmentShader.Compile(FragmentShaderSrc);
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program_ = linker.Link();
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program_.Validate();
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sampler_ = Sampler.Create();
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SamplerConfigurer configurer;
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with (configurer) {
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filterMin = GL_LINEAR;
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filterMag = GL_LINEAR;
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Configure(sampler_);
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}
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}
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///
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void SetupVertexArray(ref VertexArrayRef vao, ref ArrayBufferRef vertices) {
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vao.Bind();
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VertexArrayAttacher attacher;
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with (attacher) {
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index = 0;
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type = GL_FLOAT;
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offset = 0;
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stride = Vertex.sizeof;
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dimension = 3;
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Attach(vao, vertices);
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index = 1;
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type = GL_FLOAT;
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offset = vec3.sizeof;
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stride = Vertex.sizeof;
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dimension = 2;
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Attach(vao, vertices);
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}
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}
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///
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void Use(mat4 proj, mat4 view, mat4 model, ref Texture2DRef tex, vec4 color) {
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tex.BindToUnit(GL_TEXTURE0);
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sampler_.Bind(0);
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program_.Use();
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program_.uniform!0 = proj;
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program_.uniform!1 = view;
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program_.uniform!2 = model;
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program_.uniform!3 = 0;
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program_.uniform!4 = color;
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}
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private:
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ProgramRef program_;
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SamplerRef sampler_;
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}
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