all: switch to external shaders in the gioui.org/shaders module

Signed-off-by: Elias Naur <mail@eliasnaur.com>

gpu/internal/driver/driver.go

@@ -6,6 +6,8 @@ import (
 	"errors"
 	"image"
 	"time"
+
+	"gioui.org/shader"
 )
 
 // Device represents the abstraction of underlying GPU
@@ -23,9 +25,9 @@ type Device interface {
 	NewFramebuffer(tex Texture) (Framebuffer, error)
 	NewImmutableBuffer(typ BufferBinding, data []byte) (Buffer, error)
 	NewBuffer(typ BufferBinding, size int) (Buffer, error)
-	NewComputeProgram(shader ShaderSources) (Program, error)
-	NewProgram(vertexShader, fragmentShader ShaderSources) (Program, error)
-	NewInputLayout(vertexShader ShaderSources, layout []InputDesc) (InputLayout, error)
+	NewComputeProgram(shader shader.Sources) (Program, error)
+	NewProgram(vertexShader, fragmentShader shader.Sources) (Program, error)
+	NewInputLayout(vertexShader shader.Sources, layout []shader.InputDesc) (InputLayout, error)
 
 	Clear(r, g, b, a float32)
 	Viewport(x, y, width, height int)
@@ -49,63 +51,6 @@ type Device interface {
 	Release()
 }
 
-type ShaderSources struct {
-	Name      string
-	GLSL100ES string
-	GLSL300ES string
-	GLSL310ES string
-	GLSL130   string
-	GLSL150   string
-	HLSL      string
-	Uniforms  UniformsReflection
-	Inputs    []InputLocation
-	Textures  []TextureBinding
-	Hash      string
-}
-
-type UniformsReflection struct {
-	Blocks    []UniformBlock
-	Locations []UniformLocation
-	Size      int
-}
-
-type TextureBinding struct {
-	Name    string
-	Binding int
-}
-
-type UniformBlock struct {
-	Name    string
-	Binding int
-}
-
-type UniformLocation struct {
-	Name   string
-	Type   DataType
-	Size   int
-	Offset int
-}
-
-type InputLocation struct {
-	// For GLSL.
-	Name     string
-	Location int
-	// For HLSL.
-	Semantic      string
-	SemanticIndex int
-
-	Type DataType
-	Size int
-}
-
-// InputDesc describes a vertex attribute as laid out in a Buffer.
-type InputDesc struct {
-	Type DataType
-	Size int
-
-	Offset int
-}
-
 // InputLayout is the driver specific representation of the mapping
 // between Buffers and shader attributes.
 type InputLayout interface {
@@ -123,8 +68,6 @@ type TextureFormat uint8
 
 type BufferBinding uint8
 
-type DataType uint8
-
 type Features uint
 
 type Caps struct {
@@ -167,12 +110,6 @@ type Texture interface {
 	Release()
 }
 
-const (
-	DataTypeFloat DataType = iota
-	DataTypeInt
-	DataTypeShort
-)
-
 const (
 	BufferBindingIndices BufferBinding = 1 << iota
 	BufferBindingVertices