diff --git a/pixelgl/doc.go b/pixelgl/doc.go
index e9695529ebdf54e6e3aa8bb9116de451ed251f87..87bccc4930263d9af1c8c337b92374629e386b08 100644
--- a/pixelgl/doc.go
+++ b/pixelgl/doc.go
@@ -1,2 +1,4 @@
// Package pixelgl provides higher-level abstractions around the basic OpenGL primitives and operations.
+//
+// This package deliberately does not handle nor report OpenGL errors, it's up to you to cause none.
package pixelgl
diff --git a/pixelgl/shader.go b/pixelgl/shader.go
index ddc5f979809f6a18c3f1c98eb365ca27f0ba382a..533c56417d8470ea9b6a2a61b9af211b34a05f5a 100644
--- a/pixelgl/shader.go
+++ b/pixelgl/shader.go
@@ -5,7 +5,6 @@ import (
"github.com/go-gl/gl/v3.3-core/gl"
"github.com/go-gl/mathgl/mgl32"
- "github.com/pkg/errors"
)
// UniformFormat defines names, purposes and types of uniform variables inside a shader.
@@ -36,9 +35,9 @@ func NewShader(parent Doer, vertexFormat VertexFormat, uniformFormat UniformForm
uniforms: make(map[Attr]int32),
}
- var err, glerr error
+ var err error
parent.Do(func(ctx Context) {
- err, glerr = DoErrGLErr(func() error {
+ err = DoErr(func() error {
var vshader, fshader uint32
// vertex shader
@@ -120,15 +119,9 @@ func NewShader(parent Doer, vertexFormat VertexFormat, uniformFormat UniformForm
return nil
})
})
- if err != nil && glerr != nil {
- return nil, errors.Wrap(glerr, err.Error())
- }
if err != nil {
return nil, err
}
- if glerr != nil {
- return nil, glerr
- }
return shader, nil
}
diff --git a/pixelgl/texture.go b/pixelgl/texture.go
index 1c5c4be9aeb064c23078eb56a4280c59bddddfbf..708bc4eb5f239262f161c8c9657520e4824881d8 100644
--- a/pixelgl/texture.go
+++ b/pixelgl/texture.go
@@ -1,9 +1,6 @@
package pixelgl
-import (
- "github.com/go-gl/gl/v3.3-core/gl"
- "github.com/pkg/errors"
-)
+import "github.com/go-gl/gl/v3.3-core/gl"
// Texture is an OpenGL texture.
type Texture struct {
@@ -17,9 +14,8 @@ type Texture struct {
func NewTexture(parent Doer, width, height int, pixels []uint8) (*Texture, error) {
texture := &Texture{parent: parent}
- var err error
parent.Do(func(ctx Context) {
- err = DoGLErr(func() {
+ Do(func() {
gl.GenTextures(1, &texture.tex)
gl.BindTexture(gl.TEXTURE_2D, texture.tex)
@@ -40,9 +36,6 @@ func NewTexture(parent Doer, width, height int, pixels []uint8) (*Texture, error
gl.BindTexture(gl.TEXTURE_2D, 0)
})
})
- if err != nil {
- return nil, errors.Wrap(err, "failed to create a texture")
- }
return texture, nil
}
diff --git a/pixelgl/thread.go b/pixelgl/thread.go
index 330309a8391d52f2ef41889e2d823f159e4c3e05..818e95b9adfe18fa7473b2fe6a7b7dd33ddd24fd 100644
--- a/pixelgl/thread.go
+++ b/pixelgl/thread.go
@@ -1,7 +1,6 @@
package pixelgl
import (
- "fmt"
"runtime"
"github.com/go-gl/gl/v3.3-core/gl"
@@ -97,73 +96,3 @@ func DoVal(f func() interface{}) interface{} {
}
return <-val
}
-
-// DoGLErr is same as Do, but also return an error generated by OpenGL.
-func DoGLErr(f func()) (gl error) {
- glerr := make(chan error)
- callQueue <- func() {
- getLastGLErr() // swallow
- f()
- glerr <- getLastGLErr()
- }
- return <-glerr
-}
-
-// DoErrGLErr is same as DoErr, but also returns an error generated by OpenGL.
-func DoErrGLErr(f func() error) (_, gl error) {
- err := make(chan error)
- glerr := make(chan error)
- callQueue <- func() {
- getLastGLErr() // swallow
- err <- f()
- glerr <- getLastGLErr()
- }
- return <-err, <-glerr
-}
-
-// DoValGLErr is same as DoVal, but also returns an error generated by OpenGL.
-func DoValGLErr(f func() interface{}) (_ interface{}, gl error) {
- val := make(chan interface{})
- glerr := make(chan error)
- callQueue <- func() {
- getLastGLErr() // swallow
- val <- f()
- glerr <- getLastGLErr()
- }
- return <-val, <-glerr
-}
-
-// GLError represents an error code generated by OpenGL.
-type GLError uint32
-
-// Error returns a human-readable textual representation of an OpenGL error.
-func (err GLError) Error() string {
- if desc, ok := glErrors[uint32(err)]; ok {
- return fmt.Sprintf("OpenGL error: %s", desc)
- }
- return fmt.Sprintf("OpenGL error: unknown error")
-}
-
-var glErrors = map[uint32]string{
- gl.INVALID_ENUM: "invalid enum",
- gl.INVALID_VALUE: "invalid value",
- gl.INVALID_OPERATION: "invalid operation",
- gl.STACK_OVERFLOW: "stack overflow",
- gl.STACK_UNDERFLOW: "stack underflow",
- gl.OUT_OF_MEMORY: "out of memory",
- gl.INVALID_FRAMEBUFFER_OPERATION: "invalid framebuffer operation",
- gl.CONTEXT_LOST: "context lost",
-}
-
-// getLastGLErr returns (and consumes) the last error generated by OpenGL.
-// Don't use outside DoGLErr, DoErrGLErr and DoValGLErr.
-func getLastGLErr() error {
- err := uint32(gl.NO_ERROR)
- for e := gl.GetError(); e != gl.NO_ERROR; e = gl.GetError() {
- err = e
- }
- if err != gl.NO_ERROR {
- return GLError(err)
- }
- return nil
-}
diff --git a/pixelgl/vertex.go b/pixelgl/vertex.go
index e007d235d766a9466ce2051ed9ff43e5d0570b60..8a8f4ae9e63f2390df5501f3431472a5d4190310 100644
--- a/pixelgl/vertex.go
+++ b/pixelgl/vertex.go
@@ -105,9 +105,9 @@ func NewVertexArray(parent Doer, format VertexFormat, mode VertexDrawMode, usage
offset += attr.Type.Size()
}
- var err, glerr error
+ var err error
parent.Do(func(ctx Context) {
- err, glerr = DoErrGLErr(func() error {
+ err = DoErr(func() error {
gl.GenVertexArrays(1, &va.vao)
gl.BindVertexArray(va.vao)
@@ -149,15 +149,9 @@ func NewVertexArray(parent Doer, format VertexFormat, mode VertexDrawMode, usage
return nil
})
})
- if err != nil && glerr != nil {
- return nil, errors.Wrap(errors.Wrap(glerr, err.Error()), "failed to create vertex array")
- }
if err != nil {
return nil, errors.Wrap(err, "failed to create vertex array")
}
- if glerr != nil {
- return nil, errors.Wrap(glerr, "failed to create vertex array")
- }
return va, nil
}
@@ -222,10 +216,6 @@ func (va *VertexArray) SetVertex(vertex int, data interface{}) {
gl.BufferSubData(gl.ARRAY_BUFFER, offset, va.format.Size(), gl.Ptr(data))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
-
- if err := getLastGLErr(); err != nil {
- panic(errors.Wrap(err, "set vertex error"))
- }
})
}
@@ -253,10 +243,6 @@ func (va *VertexArray) SetVertexAttributeFloat(vertex int, purpose AttrPurpose,
gl.BufferSubData(gl.ARRAY_BUFFER, offset, attr.Type.Size(), unsafe.Pointer(&value))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
-
- if err := getLastGLErr(); err != nil {
- panic(errors.Wrap(err, "set attribute vertex"))
- }
})
return true
}
@@ -279,10 +265,6 @@ func (va *VertexArray) SetVertexAttributeVec2(vertex int, purpose AttrPurpose, v
gl.BufferSubData(gl.ARRAY_BUFFER, offset, attr.Type.Size(), unsafe.Pointer(&value))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
-
- if err := getLastGLErr(); err != nil {
- panic(errors.Wrap(err, "set attribute vertex"))
- }
})
return true
}
@@ -305,10 +287,6 @@ func (va *VertexArray) SetVertexAttributeVec3(vertex int, purpose AttrPurpose, v
gl.BufferSubData(gl.ARRAY_BUFFER, offset, attr.Type.Size(), unsafe.Pointer(&value))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
-
- if err := getLastGLErr(); err != nil {
- panic(errors.Wrap(err, "set attribute vertex"))
- }
})
return true
}
@@ -331,10 +309,6 @@ func (va *VertexArray) SetVertexAttributeVec4(vertex int, purpose AttrPurpose, v
gl.BufferSubData(gl.ARRAY_BUFFER, offset, attr.Type.Size(), unsafe.Pointer(&value))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
-
- if err := getLastGLErr(); err != nil {
- panic(errors.Wrap(err, "set attribute vertex"))
- }
})
return true
}