func glSetupShaderProg(shader *shaderProg, unif bool) {
var glStatus gl.Int
shader.glFragShader = gl.CreateShader(gl.FRAGMENT_SHADER)
glSetShaderSource(shader.glFragShader, shader.srcFrag)
gl.CompileShader(shader.glFragShader)
if gl.GetShaderiv(shader.glFragShader, gl.COMPILE_STATUS, &glStatus); glStatus == 0 {
panic("Frag shader compile error: " + glGetInfoLog(shader.glFragShader, true))
}
shader.glVertShader = gl.CreateShader(gl.VERTEX_SHADER)
glSetShaderSource(shader.glVertShader, shader.srcVert)
gl.CompileShader(shader.glVertShader)
if gl.GetShaderiv(shader.glVertShader, gl.COMPILE_STATUS, &glStatus); glStatus == 0 {
panic("Vert shader compile error: " + glGetInfoLog(shader.glFragShader, true))
}
shader.glProg = gl.CreateProgram()
gl.AttachShader(shader.glProg, shader.glFragShader)
gl.AttachShader(shader.glProg, shader.glVertShader)
gl.LinkProgram(shader.glProg)
if gl.GetProgramiv(shader.glProg, gl.LINK_STATUS, &glStatus); glStatus == 0 {
panic("Shader program link error: " + glGetInfoLog(shader.glProg, false))
}
shader.attrPos = glGetLocation(shader.glProg, "aPos", true)
if unif {
shader.unifTex = gl.Int(glGetLocation(shader.glProg, "uTex", false))
}
}
// Loads a shader from a string
func LoadShader(typ g.Enum, s string) g.Uint {
shader := g.CreateShader(typ)
cst := g.GLString(s)
defer g.GLStringFree(cst)
g.ShaderSource(shader, 1, &cst, nil)
g.CompileShader(shader)
var status g.Int
g.GetShaderiv(shader, g.COMPILE_STATUS, &status)
if status == g.FALSE {
var length g.Int
g.GetShaderiv(shader, g.INFO_LOG_LENGTH, &length)
log.Println(int(length))
logStr := g.GLStringAlloc(g.Sizei(length + 1))
// TODO: defer
g.GetShaderInfoLog(shader, g.Sizei(length), nil, logStr)
log.Println(g.GoString(logStr))
}
return shader
}
func RecompileShaders(shaderNames ...string) {
var vs string
var glProg gl.Uint
var glStatus gl.Int
var glFShader, glVShader gl.Uint
var shaderProg *gltypes.ShaderProgram
var defines = map[string]interface{}{}
defines["CANV_W"] = Screen.W
defines["CANV_H"] = Screen.H
for fsName, fsSrc := range glsl.FShaders {
if (len(shaderNames) == 0) || stringutil.IsInSlice(shaderNames, fsName) {
glFShader = gl.CreateShader(gl.FRAGMENT_SHADER)
glutil.ShaderSource(fsName, glFShader, fsSrc, defines, false)
gl.CompileShader(glFShader)
if gl.GetShaderiv(glFShader, gl.COMPILE_STATUS, &glStatus); glStatus == 0 {
log.Panicf("fshader %s: %s\n", fsName, glutil.ShaderInfoLog(glFShader, true))
}
if vs = glsl.VShaders[fsName]; len(vs) <= 0 {
vs = glsl.VShaders["ppquad"]
}
glVShader = gl.CreateShader(gl.VERTEX_SHADER)
glutil.ShaderSource(fsName, glVShader, vs, defines, false)
gl.CompileShader(glVShader)
if gl.GetShaderiv(glVShader, gl.COMPILE_STATUS, &glStatus); glStatus == 0 {
log.Panicf("vshader %s: %s\n", fsName, glutil.ShaderInfoLog(glVShader, true))
}
glProg = gl.CreateProgram()
gl.AttachShader(glProg, glFShader)
if glVShader != 0 {
gl.AttachShader(glProg, glVShader)
}
gl.LinkProgram(glProg)
if gl.GetProgramiv(glProg, gl.LINK_STATUS, &glStatus); glStatus == 0 {
log.Panicf("sprog %s: %s", fsName, glutil.ShaderInfoLog(glProg, false))
}
shaderProg = gltypes.NewShaderProgram(fsName, glProg, glFShader, glVShader)
shaderProg.UnifCamLook = glutil.ShaderLocationU(glProg, "uCamLook")
shaderProg.UnifCamPos = glutil.ShaderLocationU(glProg, "uCamPos")
shaderProg.UnifScreen = glutil.ShaderLocationU(glProg, "uScreen")
shaderProg.UnifTex0 = glutil.ShaderLocationU(glProg, "uTex0")
shaderProg.UnifTex1 = glutil.ShaderLocationU(glProg, "uTex1")
shaderProg.UnifTex2 = glutil.ShaderLocationU(glProg, "uTex2")
shaderProg.UnifTime = glutil.ShaderLocationU(glProg, "uTime")
if fsName == "canvas" {
if Shaders.Canvas != nil {
Shaders.Canvas.CleanUp()
}
Shaders.Canvas = shaderProg
} else if fsName == "postfx" {
if Shaders.PostFx != nil {
Shaders.PostFx.CleanUp()
}
Shaders.PostFx = shaderProg
} else if fsName == "ppblur" {
if Shaders.PostBlur != nil {
Shaders.PostBlur.CleanUp()
}
Shaders.PostBlur = shaderProg
} else if fsName == "ppbright" {
if Shaders.PostBright != nil {
Shaders.PostBright.CleanUp()
}
Shaders.PostBright = shaderProg
} else if fsName == "pplum2" {
if Shaders.PostLum2 != nil {
Shaders.PostLum2.CleanUp()
}
Shaders.PostLum2 = shaderProg
} else if fsName == "pplum3" {
if Shaders.PostLum3 != nil {
Shaders.PostLum3.CleanUp()
}
Shaders.PostLum3 = shaderProg
} else if fsName == "texture" {
if Shaders.Texture != nil {
Shaders.Texture.CleanUp()
}
Shaders.Texture = shaderProg
} else if fsName == "cast" {
if Shaders.Cast != nil {
Shaders.Cast.CleanUp()
}
Shaders.Cast = shaderProg
}
}
}
}