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internal/graphicsdriver/opengl: refactoring

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This commit is contained in:
Hajime Hoshi 2023-03-20 13:22:51 +09:00
parent 8b267265ed
commit 23e90b7e39
3 changed files with 20 additions and 25 deletions
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11
internal/graphicsdriver/opengl/context.go
View File

@ -18,7 +18,6 @@ import (
"errors"
"fmt"
"sync"
"unsafe"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/opengl/gl"
@ -503,13 +502,3 @@ func (c *context) newElementArrayBuffer(size int) buffer {
c.ctx.BufferInit(gl.ELEMENT_ARRAY_BUFFER, size, gl.DYNAMIC_DRAW)
return buffer(b)
}
func (c *context) arrayBufferSubData(data []float32) {
s := unsafe.Slice((*byte)(unsafe.Pointer(&data[0])), len(data)*4)
c.ctx.BufferSubData(gl.ARRAY_BUFFER, 0, s)
}
func (c *context) elementArrayBufferSubData(data []uint16) {
s := unsafe.Slice((*byte)(unsafe.Pointer(&data[0])), len(data)*2)
c.ctx.BufferSubData(gl.ELEMENT_ARRAY_BUFFER, 0, s)
}

4
internal/graphicsdriver/opengl/graphics.go
View File

@ -155,9 +155,7 @@ func (g *Graphics) Reset() error {
}
func (g *Graphics) SetVertices(vertices []float32, indices []uint16) error {
// Note that the vertices and the indices passed to BufferSubData is not under GC management in the gl package.
g.context.arrayBufferSubData(vertices)
g.context.elementArrayBufferSubData(indices)
g.state.setVertices(&g.context, vertices, indices)
return nil
}

30
internal/graphicsdriver/opengl/program.go
View File

@ -63,11 +63,6 @@ func (a *arrayBufferLayout) totalBytes() int {
return a.total
}
// newArrayBuffer creates OpenGL's buffer object for the array buffer.
func (a *arrayBufferLayout) newArrayBuffer(context *context) buffer {
return context.newArrayBuffer(a.totalBytes() * graphics.IndicesCount)
}
// enable starts using the array buffer.
func (a *arrayBufferLayout) enable(context *context) {
for i := range a.parts {
@ -115,7 +110,6 @@ func init() {
}
}
// openGLState is a state for
type openGLState struct {
// arrayBuffer is OpenGL's array buffer (vertices data).
arrayBuffer buffer
@ -150,13 +144,29 @@ func (s *openGLState) reset(context *context) error {
context.ctx.DeleteBuffer(uint32(s.elementArrayBuffer))
}
}
s.arrayBuffer = theArrayBufferLayout.newArrayBuffer(context)
s.elementArrayBuffer = context.newElementArrayBuffer(graphics.IndicesCount * 2)
s.arrayBuffer = 0
s.elementArrayBuffer = 0
return nil
}
func (s *openGLState) setVertices(context *context, vertices []float32, indices []uint16) {
if s.arrayBuffer == 0 {
s.arrayBuffer = context.newArrayBuffer(graphics.IndicesCount * graphics.VertexFloatCount * floatSizeInBytes)
context.ctx.BindBuffer(gl.ARRAY_BUFFER, uint32(s.arrayBuffer))
}
if s.elementArrayBuffer == 0 {
s.elementArrayBuffer = context.newElementArrayBuffer(graphics.IndicesCount * 2)
context.ctx.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, uint32(s.elementArrayBuffer))
}
// Note that the vertices and the indices passed to BufferSubData is not under GC management in the gl package.
vs := unsafe.Slice((*byte)(unsafe.Pointer(&vertices[0])), len(vertices)*4)
context.ctx.BufferSubData(gl.ARRAY_BUFFER, 0, vs)
is := unsafe.Slice((*byte)(unsafe.Pointer(&indices[0])), len(indices)*2)
context.ctx.BufferSubData(gl.ELEMENT_ARRAY_BUFFER, 0, is)
}
func (s *openGLState) resetLastUniforms() {
for k := range s.lastUniforms {
delete(s.lastUniforms, k)
@ -205,8 +215,6 @@ func (g *Graphics) useProgram(program program, uniforms []uniformVariable, textu
g.context.ctx.UseProgram(uint32(program))
if g.state.lastProgram == 0 {
theArrayBufferLayout.enable(&g.context)
g.context.ctx.BindBuffer(gl.ARRAY_BUFFER, uint32(g.state.arrayBuffer))
g.context.ctx.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, uint32(g.state.elementArrayBuffer))
}
g.state.lastProgram = program