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graphicsdriver/metal: Add a generalized 'draw' function
This is a preparation for rendering shaders. Updates #1165
This commit is contained in:
Hajime Hoshi
parent
28c638cb5b
commit
fe1cea533a
@ -641,103 +641,124 @@ func (g *Graphics) Reset() error {
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return nil
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}
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func (g *Graphics) Draw(dstID, srcID driver.ImageID, indexLen int, indexOffset int, mode driver.CompositeMode, colorM *affine.ColorM, filter driver.Filter, address driver.Address, sourceRegion driver.Region) error {
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// TODO: Use sourceRegion.
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func (g *Graphics) draw(rps mtl.RenderPipelineState, dst *Image, srcs [graphics.ShaderImageNum]*Image, indexLen int, indexOffset int, uniforms []interface{}) error {
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g.view.update()
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rpd := mtl.RenderPassDescriptor{}
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// Even though the destination pixels are not used, mtl.LoadActionDontCare might cause glitches
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// (#1019). Always using mtl.LoadActionLoad is safe.
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rpd.ColorAttachments[0].LoadAction = mtl.LoadActionLoad
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rpd.ColorAttachments[0].StoreAction = mtl.StoreActionStore
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var t mtl.Texture
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if dst.screen {
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if g.screenDrawable == (ca.MetalDrawable{}) {
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drawable := g.view.drawable()
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if drawable == (ca.MetalDrawable{}) {
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return nil
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}
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g.screenDrawable = drawable
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}
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t = g.screenDrawable.Texture()
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} else {
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t = dst.texture
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}
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rpd.ColorAttachments[0].Texture = t
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rpd.ColorAttachments[0].ClearColor = mtl.ClearColor{}
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if g.cb == (mtl.CommandBuffer{}) {
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g.cb = g.cq.MakeCommandBuffer()
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}
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rce := g.cb.MakeRenderCommandEncoder(rpd)
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rce.SetRenderPipelineState(rps)
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// In Metal, the NDC's Y direction (upward) and the framebuffer's Y direction (downward) don't
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// match. Then, the Y direction must be inverted.
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w, h := dst.viewportSize()
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rce.SetViewport(mtl.Viewport{
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OriginX: 0,
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OriginY: float64(h),
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Width: float64(w),
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Height: -float64(h),
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ZNear: -1,
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ZFar: 1,
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})
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rce.SetVertexBuffer(g.vb, 0, 0)
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for i, u := range uniforms {
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switch u := u.(type) {
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case float32:
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rce.SetVertexBytes(unsafe.Pointer(&u), unsafe.Sizeof(u), i+1)
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rce.SetFragmentBytes(unsafe.Pointer(&u), unsafe.Sizeof(u), i+1)
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case []float32:
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rce.SetVertexBytes(unsafe.Pointer(&u[0]), unsafe.Sizeof(u[0])*uintptr(len(u)), i+1)
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rce.SetFragmentBytes(unsafe.Pointer(&u[0]), unsafe.Sizeof(u[0])*uintptr(len(u)), i+1)
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default:
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return fmt.Errorf("metal: unexpected uniform value: %[1]v (type: %[1]T)", u)
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}
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}
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for i, src := range srcs {
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if src != nil {
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rce.SetFragmentTexture(src.texture, i)
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} else {
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rce.SetFragmentTexture(mtl.Texture{}, i)
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}
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}
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rce.DrawIndexedPrimitives(mtl.PrimitiveTypeTriangle, indexLen, mtl.IndexTypeUInt16, g.ib, indexOffset*2)
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rce.EndEncoding()
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return nil
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}
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func (g *Graphics) Draw(dstID, srcID driver.ImageID, indexLen int, indexOffset int, mode driver.CompositeMode, colorM *affine.ColorM, filter driver.Filter, address driver.Address, sourceRegion driver.Region) error {
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dst := g.images[dstID]
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src := g.images[srcID]
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srcs := [graphics.ShaderImageNum]*Image{g.images[srcID]}
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var rps mtl.RenderPipelineState
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if dst.screen && filter == driver.FilterScreen {
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rps = g.screenRPS
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} else {
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rps = g.rpss[rpsKey{
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screen: dst.screen,
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useColorM: colorM != nil,
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filter: filter,
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address: address,
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compositeMode: mode,
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}]
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}
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if err := g.t.Call(func() error {
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g.view.update()
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rpd := mtl.RenderPassDescriptor{}
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// Even though the destination pixels are not used, mtl.LoadActionDontCare might cause glitches
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// (#1019). Always using mtl.LoadActionLoad is safe.
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rpd.ColorAttachments[0].LoadAction = mtl.LoadActionLoad
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rpd.ColorAttachments[0].StoreAction = mtl.StoreActionStore
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var t mtl.Texture
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if dst.screen {
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if g.screenDrawable == (ca.MetalDrawable{}) {
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drawable := g.view.drawable()
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if drawable == (ca.MetalDrawable{}) {
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return nil
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}
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g.screenDrawable = drawable
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}
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t = g.screenDrawable.Texture()
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} else {
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t = dst.texture
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}
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rpd.ColorAttachments[0].Texture = t
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rpd.ColorAttachments[0].ClearColor = mtl.ClearColor{}
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if g.cb == (mtl.CommandBuffer{}) {
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g.cb = g.cq.MakeCommandBuffer()
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}
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rce := g.cb.MakeRenderCommandEncoder(rpd)
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if dst.screen && filter == driver.FilterScreen {
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rce.SetRenderPipelineState(g.screenRPS)
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} else {
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rce.SetRenderPipelineState(g.rpss[rpsKey{
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screen: dst.screen,
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useColorM: colorM != nil,
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filter: filter,
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address: address,
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compositeMode: mode,
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}])
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}
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// In Metal, the NDC's Y direction (upward) and the framebuffer's Y direction (downward) don't
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// match. Then, the Y direction must be inverted.
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w, h := dst.viewportSize()
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rce.SetViewport(mtl.Viewport{
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OriginX: 0,
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OriginY: float64(h),
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Width: float64(w),
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Height: -float64(h),
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ZNear: -1,
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ZFar: 1,
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})
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rce.SetVertexBuffer(g.vb, 0, 0)
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viewportSize := [...]float32{float32(w), float32(h)}
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rce.SetVertexBytes(unsafe.Pointer(&viewportSize[0]), unsafe.Sizeof(viewportSize), 1)
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sourceSize := [...]float32{
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float32(graphics.InternalImageSize(src.width)),
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float32(graphics.InternalImageSize(src.height)),
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sourceSize := []float32{0, 0}
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if filter != driver.FilterNearest {
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sourceSize[0] = float32(graphics.InternalImageSize(srcs[0].width))
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sourceSize[1] = float32(graphics.InternalImageSize(srcs[0].height))
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}
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rce.SetFragmentBytes(unsafe.Pointer(&sourceSize[0]), unsafe.Sizeof(sourceSize), 2)
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esBody, esTranslate := colorM.UnsafeElements()
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rce.SetFragmentBytes(unsafe.Pointer(&esBody[0]), unsafe.Sizeof(esBody[0])*uintptr(len(esBody)), 3)
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rce.SetFragmentBytes(unsafe.Pointer(&esTranslate[0]), unsafe.Sizeof(esTranslate[0])*uintptr(len(esTranslate)), 4)
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scale := float32(dst.width) / float32(src.width)
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rce.SetFragmentBytes(unsafe.Pointer(&scale), unsafe.Sizeof(scale), 5)
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sr := [...]float32{
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sourceRegion.X,
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sourceRegion.Y,
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sourceRegion.X + sourceRegion.Width,
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sourceRegion.Y + sourceRegion.Height,
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scale := float32(0)
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if filter == driver.FilterScreen {
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scale = float32(dst.width) / float32(srcs[0].width)
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}
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rce.SetFragmentBytes(unsafe.Pointer(&sr[0]), unsafe.Sizeof(sr), 6)
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if src != nil {
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rce.SetFragmentTexture(src.texture, 0)
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} else {
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rce.SetFragmentTexture(mtl.Texture{}, 0)
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uniforms := []interface{}{
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[]float32{float32(w), float32(h)},
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sourceSize,
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esBody,
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esTranslate,
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scale,
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[]float32{
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sourceRegion.X,
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sourceRegion.Y,
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sourceRegion.X + sourceRegion.Width,
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sourceRegion.Y + sourceRegion.Height,
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},
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}
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if err := g.draw(rps, dst, srcs, indexLen, indexOffset, uniforms); err != nil {
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return err
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}
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rce.DrawIndexedPrimitives(mtl.PrimitiveTypeTriangle, indexLen, mtl.IndexTypeUInt16, g.ib, indexOffset*2)
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rce.EndEncoding()
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return nil
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}); err != nil {
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return err
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}
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return nil
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}
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