// MakeTextShader creates a new shader program
// for text rendering purposes.
func MakeTextShader() gl.Program {
vertSource := loadTextVertexShader()
fragSource := loadTextFragmentShader()
return glh.NewProgram(
glh.Shader{Type: gl.VERTEX_SHADER, Program: string(vertSource)},
glh.Shader{Type: gl.FRAGMENT_SHADER, Program: string(fragSource)},
)
}
func MakeProgram(vertFname, fragFname string) gl.Program {
vertSource, err := ioutil.ReadFile(vertFname)
if err != nil {
panic(err)
}
fragSource, err := ioutil.ReadFile(fragFname)
if err != nil {
panic(err)
}
return glh.NewProgram(glh.Shader{gl.VERTEX_SHADER, string(vertSource)}, glh.Shader{gl.FRAGMENT_SHADER, string(fragSource)})
}
func shaderLoad() {
shaderUnload()
vssource, _ := ioutil.ReadFile("data/shaders/vs_zdistance.glsl")
fssource, _ := ioutil.ReadFile("data/shaders/fs_zdistance.glsl")
fsShader := glh.Shader{gl.FRAGMENT_SHADER, string(fssource)}
vsShader := glh.Shader{gl.VERTEX_SHADER, string(vssource)}
raytraceProgram = glh.NewProgram(vsShader, fsShader)
raytraceProgram.Use()
mInput = raytraceProgram.GetUniformLocation("M")
vInput = raytraceProgram.GetUniformLocation("V")
pInput = raytraceProgram.GetUniformLocation("P")
vssource, _ = ioutil.ReadFile("data/shaders/vs.glsl")
fssource, _ = ioutil.ReadFile("data/shaders/fs_compose.glsl")
fsShader = glh.Shader{gl.FRAGMENT_SHADER, string(fssource)}
vsShader = glh.Shader{gl.VERTEX_SHADER, string(vssource)}
composeProgram = glh.NewProgram(vsShader, fsShader)
composeProgram.Use()
mInputC = composeProgram.GetUniformLocation("M")
vInputC = composeProgram.GetUniformLocation("V")
pInputC = composeProgram.GetUniformLocation("P")
frontTextureInput = composeProgram.GetUniformLocation("frontTexture")
backTextureInput = composeProgram.GetUniformLocation("backTexture")
volumeTextureInput = composeProgram.GetUniformLocation("volumeData")
palleteTextureInput = composeProgram.GetUniformLocation("palleteData")
composeProgram.Use()
frontTextureInput.Uniform1i(1)
backTextureInput.Uniform1i(0)
volumeTextureInput.Uniform1i(2)
palleteTextureInput.Uniform1i(3)
programLoaded = true
}
func NewGlDrawer(vshader, fshader string) *GlDrawer {
vao := gl.GenVertexArray()
vao.Bind()
vbo := gl.GenBuffer()
vbo.Bind(gl.ARRAY_BUFFER)
ebo := gl.GenBuffer()
ebo.Bind(gl.ELEMENT_ARRAY_BUFFER)
vsh := ShaderFromFile(gl.VERTEX_SHADER, vshader)
fsh := ShaderFromFile(gl.FRAGMENT_SHADER, fshader)
program := glh.NewProgram(vsh, fsh)
program.BindFragDataLocation(0, "outColor")
program.Use()
return &GlDrawer{
program: program,
vao: vao,
vbo: vbo,
ebo: ebo,
}
}