mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 13:22:19 +02:00
114 lines
3.2 KiB
Go
114 lines
3.2 KiB
Go
// Copyright 2022 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ui
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import (
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"fmt"
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"math"
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"reflect"
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"strings"
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"github.com/hajimehoshi/ebiten/v2/internal/mipmap"
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
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)
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type Shader struct {
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shader *mipmap.Shader
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uniformNames []string
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uniformTypes []shaderir.Type
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uniformNameToIndex map[string]int
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uniformNameToType map[string]shaderir.Type
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}
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func NewShader(ir *shaderir.Program) *Shader {
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return &Shader{
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shader: mipmap.NewShader(ir),
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uniformNames: ir.UniformNames,
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uniformTypes: ir.Uniforms,
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}
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}
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func (s *Shader) MarkDisposed() {
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s.shader.MarkDisposed()
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s.shader = nil
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}
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func (s *Shader) ConvertUniforms(uniforms map[string]any) [][]uint32 {
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nameToU32s := map[string][]uint32{}
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for name, v := range uniforms {
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v := reflect.ValueOf(v)
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t := v.Type()
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switch t.Kind() {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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nameToU32s[name] = []uint32{uint32(v.Int())}
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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nameToU32s[name] = []uint32{uint32(v.Uint())}
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case reflect.Float32, reflect.Float64:
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nameToU32s[name] = []uint32{math.Float32bits(float32(v.Float()))}
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case reflect.Slice, reflect.Array:
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u32s := make([]uint32, v.Len())
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switch t.Elem().Kind() {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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for i := range u32s {
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u32s[i] = uint32(v.Index(i).Int())
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}
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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for i := range u32s {
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u32s[i] = uint32(v.Index(i).Uint())
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}
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case reflect.Float32, reflect.Float64:
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for i := range u32s {
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u32s[i] = math.Float32bits(float32(v.Index(i).Float()))
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}
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default:
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panic(fmt.Sprintf("ebiten: unexpected uniform value type: %s (%s)", name, v.Kind().String()))
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}
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nameToU32s[name] = u32s
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default:
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panic(fmt.Sprintf("ebiten: unexpected uniform value type: %s (%s)", name, v.Kind().String()))
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}
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}
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if s.uniformNameToIndex == nil {
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s.uniformNameToIndex = map[string]int{}
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s.uniformNameToType = map[string]shaderir.Type{}
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var idx int
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for i, n := range s.uniformNames {
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if strings.HasPrefix(n, "__") {
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continue
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}
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s.uniformNameToIndex[n] = idx
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s.uniformNameToType[n] = s.uniformTypes[i]
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idx++
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}
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}
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us := make([][]uint32, len(s.uniformNameToIndex))
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for name, idx := range s.uniformNameToIndex {
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if v, ok := nameToU32s[name]; ok {
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us[idx] = v
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continue
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}
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t := s.uniformNameToType[name]
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us[idx] = make([]uint32, t.Uint32Count())
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}
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// TODO: Panic if uniforms include an invalid name
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return us
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}
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