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b1d7a5f595
With WebGL1, an extension is required for dFdx. On the other hand, with WebGL2, GLSL ES 300 is required and the extension is forbidden. This change fixes shaderir/glsl to switch the output depends on the WebGL version. This change also adds a new build tag 'ebitenwebgl1' forcing WebGL 1. Updates #1404
77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
// Copyright 2020 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 opengl
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import (
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"fmt"
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"github.com/hajimehoshi/ebiten/v2/internal/driver"
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir/glsl"
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)
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type Shader struct {
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id driver.ShaderID
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graphics *Graphics
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ir *shaderir.Program
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p program
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}
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func newShader(id driver.ShaderID, graphics *Graphics, program *shaderir.Program) (*Shader, error) {
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s := &Shader{
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id: id,
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graphics: graphics,
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ir: program,
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}
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if err := s.compile(); err != nil {
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return nil, err
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}
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return s, nil
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}
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func (s *Shader) ID() driver.ShaderID {
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return s.id
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}
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func (s *Shader) Dispose() {
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s.graphics.context.deleteProgram(s.p)
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s.graphics.removeShader(s)
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}
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func (s *Shader) compile() error {
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vssrc, fssrc := glsl.Compile(s.ir, glslVersion())
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vs, err := s.graphics.context.newShader(vertexShader, vssrc)
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if err != nil {
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return fmt.Errorf("opengl: vertex shader compile error: %v, source:\n%s", err, vssrc)
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}
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defer s.graphics.context.deleteShader(vs)
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fs, err := s.graphics.context.newShader(fragmentShader, fssrc)
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if err != nil {
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return fmt.Errorf("opengl: fragment shader compile error: %v, source:\n%s", err, fssrc)
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}
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defer s.graphics.context.deleteShader(fs)
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p, err := s.graphics.context.newProgram([]shader{vs, fs}, theArrayBufferLayout.names())
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if err != nil {
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return err
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}
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s.p = p
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return nil
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}
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