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26_depth_buffering.diff
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26_depth_buffering.diff
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diff --git a/../steps/25_texture_mapping/main.go b/../steps/26_depth_buffering/main.go
index ef55839..54a71f4 100644
--- a/../steps/25_texture_mapping/main.go
+++ b/../steps/26_depth_buffering/main.go
@@ -49,7 +49,7 @@ type SwapChainSupportDetails struct {
}
type Vertex struct {
- Position vkngmath.Vec2[float32]
+ Position vkngmath.Vec3[float32]
Color vkngmath.Vec3[float32]
TexCoord vkngmath.Vec2[float32]
}
@@ -96,13 +96,21 @@ func getVertexAttributeDescriptions() []core1_0.VertexInputAttributeDescription
}
var vertices = []Vertex{
- {Position: vkngmath.Vec2[float32]{X: -0.5, Y: -0.5}, Color: vkngmath.Vec3[float32]{X: 1, Y: 0, Z: 0}, TexCoord: vkngmath.Vec2[float32]{X: 1, Y: 0}},
- {Position: vkngmath.Vec2[float32]{X: 0.5, Y: -0.5}, Color: vkngmath.Vec3[float32]{X: 0, Y: 1, Z: 0}, TexCoord: vkngmath.Vec2[float32]{X: 0, Y: 0}},
- {Position: vkngmath.Vec2[float32]{X: 0.5, Y: 0.5}, Color: vkngmath.Vec3[float32]{X: 0, Y: 0, Z: 1}, TexCoord: vkngmath.Vec2[float32]{X: 0, Y: 1}},
- {Position: vkngmath.Vec2[float32]{X: -0.5, Y: 0.5}, Color: vkngmath.Vec3[float32]{X: 1, Y: 1, Z: 1}, TexCoord: vkngmath.Vec2[float32]{X: 1, Y: 1}},
+ {Position: vkngmath.Vec3[float32]{X: -0.5, Y: -0.5, Z: 0}, Color: vkngmath.Vec3[float32]{X: 1, Y: 0, Z: 0}, TexCoord: vkngmath.Vec2[float32]{X: 1, Y: 0}},
+ {Position: vkngmath.Vec3[float32]{X: 0.5, Y: -0.5, Z: 0}, Color: vkngmath.Vec3[float32]{X: 0, Y: 1, Z: 0}, TexCoord: vkngmath.Vec2[float32]{X: 0, Y: 0}},
+ {Position: vkngmath.Vec3[float32]{X: 0.5, Y: 0.5, Z: 0}, Color: vkngmath.Vec3[float32]{X: 0, Y: 0, Z: 1}, TexCoord: vkngmath.Vec2[float32]{X: 0, Y: 1}},
+ {Position: vkngmath.Vec3[float32]{X: -0.5, Y: 0.5, Z: 0}, Color: vkngmath.Vec3[float32]{X: 1, Y: 1, Z: 1}, TexCoord: vkngmath.Vec2[float32]{X: 1, Y: 1}},
+
+ {Position: vkngmath.Vec3[float32]{X: -0.5, Y: -0.5, Z: -0.5}, Color: vkngmath.Vec3[float32]{X: 1, Y: 0, Z: 0}, TexCoord: vkngmath.Vec2[float32]{X: 0, Y: 0}},
+ {Position: vkngmath.Vec3[float32]{X: 0.5, Y: -0.5, Z: -0.5}, Color: vkngmath.Vec3[float32]{X: 0, Y: 1, Z: 0}, TexCoord: vkngmath.Vec2[float32]{X: 1, Y: 0}},
+ {Position: vkngmath.Vec3[float32]{X: 0.5, Y: 0.5, Z: -0.5}, Color: vkngmath.Vec3[float32]{X: 0, Y: 0, Z: 1}, TexCoord: vkngmath.Vec2[float32]{X: 1, Y: 1}},
+ {Position: vkngmath.Vec3[float32]{X: -0.5, Y: 0.5, Z: -0.5}, Color: vkngmath.Vec3[float32]{X: 1, Y: 1, Z: 1}, TexCoord: vkngmath.Vec2[float32]{X: 0, Y: 1}},
}
-var indices = []uint16{0, 1, 2, 2, 3, 0}
+var indices = []uint16{
+ 0, 1, 2, 2, 3, 0,
+ 4, 5, 6, 6, 7, 4,
+}
type HelloTriangleApplication struct {
window *sdl.Window
@@ -155,6 +163,10 @@ type HelloTriangleApplication struct {
textureImageMemory core1_0.DeviceMemory
textureImageView core1_0.ImageView
textureSampler core1_0.Sampler
+
+ depthImage core1_0.Image
+ depthImageMemory core1_0.DeviceMemory
+ depthImageView core1_0.ImageView
}
func (app *HelloTriangleApplication) Run() error {
@@ -242,12 +254,17 @@ func (app *HelloTriangleApplication) initVulkan() error {
return err
}
- err = app.createFramebuffers()
+ err = app.createCommandPool()
if err != nil {
return err
}
- err = app.createCommandPool()
+ err = app.createDepthResources()
+ if err != nil {
+ return err
+ }
+
+ err = app.createFramebuffers()
if err != nil {
return err
}
@@ -339,6 +356,21 @@ appLoop:
}
func (app *HelloTriangleApplication) cleanupSwapChain() {
+ if app.depthImageView != nil {
+ app.depthImageView.Destroy(nil)
+ app.depthImageView = nil
+ }
+
+ if app.depthImage != nil {
+ app.depthImage.Destroy(nil)
+ app.depthImage = nil
+ }
+
+ if app.depthImageMemory != nil {
+ app.depthImageMemory.Free(nil)
+ app.depthImageMemory = nil
+ }
+
for _, framebuffer := range app.swapchainFramebuffers {
framebuffer.Destroy(nil)
}
@@ -500,6 +532,11 @@ func (app *HelloTriangleApplication) recreateSwapChain() error {
return err
}
+ err = app.createDepthResources()
+ if err != nil {
+ return err
+ }
+
err = app.createFramebuffers()
if err != nil {
return err
@@ -766,7 +803,7 @@ func (app *HelloTriangleApplication) createImageViews() error {
var imageViews []core1_0.ImageView
for _, image := range images {
- view, err := app.createImageView(image, app.swapchainImageFormat)
+ view, err := app.createImageView(image, app.swapchainImageFormat, core1_0.ImageAspectColor)
if err != nil {
return err
}
@@ -779,6 +816,11 @@ func (app *HelloTriangleApplication) createImageViews() error {
}
func (app *HelloTriangleApplication) createRenderPass() error {
+ depthFormat, err := app.findDepthFormat()
+ if err != nil {
+ return err
+ }
+
renderPass, _, err := app.device.CreateRenderPass(nil, core1_0.RenderPassCreateInfo{
Attachments: []core1_0.AttachmentDescription{
{
@@ -791,6 +833,16 @@ func (app *HelloTriangleApplication) createRenderPass() error {
InitialLayout: core1_0.ImageLayoutUndefined,
FinalLayout: khr_swapchain.ImageLayoutPresentSrc,
},
+ {
+ Format: depthFormat,
+ Samples: core1_0.Samples1,
+ LoadOp: core1_0.AttachmentLoadOpClear,
+ StoreOp: core1_0.AttachmentStoreOpDontCare,
+ StencilLoadOp: core1_0.AttachmentLoadOpDontCare,
+ StencilStoreOp: core1_0.AttachmentStoreOpDontCare,
+ InitialLayout: core1_0.ImageLayoutUndefined,
+ FinalLayout: core1_0.ImageLayoutDepthStencilAttachmentOptimal,
+ },
},
Subpasses: []core1_0.SubpassDescription{
{
@@ -801,6 +853,10 @@ func (app *HelloTriangleApplication) createRenderPass() error {
Layout: core1_0.ImageLayoutColorAttachmentOptimal,
},
},
+ DepthStencilAttachment: &core1_0.AttachmentReference{
+ Attachment: 1,
+ Layout: core1_0.ImageLayoutDepthStencilAttachmentOptimal,
+ },
},
},
SubpassDependencies: []core1_0.SubpassDependency{
@@ -808,11 +864,11 @@ func (app *HelloTriangleApplication) createRenderPass() error {
SrcSubpass: core1_0.SubpassExternal,
DstSubpass: 0,
- SrcStageMask: core1_0.PipelineStageColorAttachmentOutput,
+ SrcStageMask: core1_0.PipelineStageColorAttachmentOutput | core1_0.PipelineStageEarlyFragmentTests,
SrcAccessMask: 0,
- DstStageMask: core1_0.PipelineStageColorAttachmentOutput,
- DstAccessMask: core1_0.AccessColorAttachmentWrite,
+ DstStageMask: core1_0.PipelineStageColorAttachmentOutput | core1_0.PipelineStageEarlyFragmentTests,
+ DstAccessMask: core1_0.AccessColorAttachmentWrite | core1_0.AccessDepthStencilAttachmentWrite,
},
},
})
@@ -955,6 +1011,12 @@ func (app *HelloTriangleApplication) createGraphicsPipeline() error {
MinSampleShading: 1.0,
}
+ depthStencil := &core1_0.PipelineDepthStencilStateCreateInfo{
+ DepthTestEnable: true,
+ DepthWriteEnable: true,
+ DepthCompareOp: core1_0.CompareOpLess,
+ }
+
colorBlend := &core1_0.PipelineColorBlendStateCreateInfo{
LogicOpEnabled: false,
LogicOp: core1_0.LogicOpCopy,
@@ -985,6 +1047,7 @@ func (app *HelloTriangleApplication) createGraphicsPipeline() error {
ViewportState: viewport,
RasterizationState: rasterization,
MultisampleState: multisample,
+ DepthStencilState: depthStencil,
ColorBlendState: colorBlend,
Layout: app.pipelineLayout,
RenderPass: app.renderPass,
@@ -1007,6 +1070,7 @@ func (app *HelloTriangleApplication) createFramebuffers() error {
Layers: 1,
Attachments: []core1_0.ImageView{
imageView,
+ app.depthImageView,
},
Width: app.swapchainExtent.Width,
Height: app.swapchainExtent.Height,
@@ -1039,6 +1103,49 @@ func (app *HelloTriangleApplication) createCommandPool() error {
return nil
}
+func (app *HelloTriangleApplication) createDepthResources() error {
+ depthFormat, err := app.findDepthFormat()
+ if err != nil {
+ return err
+ }
+
+ app.depthImage, app.depthImageMemory, err = app.createImage(app.swapchainExtent.Width,
+ app.swapchainExtent.Height,
+ depthFormat,
+ core1_0.ImageTilingOptimal,
+ core1_0.ImageUsageDepthStencilAttachment,
+ core1_0.MemoryPropertyDeviceLocal)
+ if err != nil {
+ return err
+ }
+ app.depthImageView, err = app.createImageView(app.depthImage, depthFormat, core1_0.ImageAspectDepth)
+ return err
+}
+
+func (app *HelloTriangleApplication) findSupportedFormat(formats []core1_0.Format, tiling core1_0.ImageTiling, features core1_0.FormatFeatureFlags) (core1_0.Format, error) {
+ for _, format := range formats {
+ props := app.physicalDevice.FormatProperties(format)
+
+ if tiling == core1_0.ImageTilingLinear && (props.LinearTilingFeatures&features) == features {
+ return format, nil
+ } else if tiling == core1_0.ImageTilingOptimal && (props.OptimalTilingFeatures&features) == features {
+ return format, nil
+ }
+ }
+
+ return 0, errors.Errorf("failed to find supported format for tiling %s, featureset %s", tiling, features)
+}
+
+func (app *HelloTriangleApplication) findDepthFormat() (core1_0.Format, error) {
+ return app.findSupportedFormat([]core1_0.Format{core1_0.FormatD32SignedFloat, core1_0.FormatD32SignedFloatS8UnsignedInt, core1_0.FormatD24UnsignedNormalizedS8UnsignedInt},
+ core1_0.ImageTilingOptimal,
+ core1_0.FormatFeatureDepthStencilAttachment)
+}
+
+func hasStencilComponent(format core1_0.Format) bool {
+ return format == core1_0.FormatD32SignedFloatS8UnsignedInt || format == core1_0.FormatD24UnsignedNormalizedS8UnsignedInt
+}
+
func (app *HelloTriangleApplication) createTextureImage() error {
//Put image data into staging buffer
imageBytes, err := fileSystem.ReadFile("images/texture.png")
@@ -1101,7 +1208,7 @@ func (app *HelloTriangleApplication) createTextureImage() error {
func (app *HelloTriangleApplication) createTextureImageView() error {
var err error
- app.textureImageView, err = app.createImageView(app.textureImage, core1_0.FormatR8G8B8A8SRGB)
+ app.textureImageView, err = app.createImageView(app.textureImage, core1_0.FormatR8G8B8A8SRGB, core1_0.ImageAspectColor)
return err
}
@@ -1129,13 +1236,13 @@ func (app *HelloTriangleApplication) createSampler() error {
return err
}
-func (app *HelloTriangleApplication) createImageView(image core1_0.Image, format core1_0.Format) (core1_0.ImageView, error) {
+func (app *HelloTriangleApplication) createImageView(image core1_0.Image, format core1_0.Format, aspect core1_0.ImageAspectFlags) (core1_0.ImageView, error) {
imageView, _, err := app.device.CreateImageView(nil, core1_0.ImageViewCreateInfo{
Image: image,
ViewType: core1_0.ImageViewType2D,
Format: format,
SubresourceRange: core1_0.ImageSubresourceRange{
- AspectMask: core1_0.ImageAspectColor,
+ AspectMask: aspect,
BaseMipLevel: 0,
LevelCount: 1,
BaseArrayLayer: 0,
@@ -1561,6 +1668,7 @@ func (app *HelloTriangleApplication) createCommandBuffers() error {
},
ClearValues: []core1_0.ClearValue{
core1_0.ClearValueFloat{0, 0, 0, 1},
+ core1_0.ClearValueDepthStencil{Depth: 1.0, Stencil: 0},
},
})
if err != nil {
@@ -1691,7 +1799,12 @@ func (app *HelloTriangleApplication) updateUniformBuffer(currentImage int) error
&vkngmath.Vec3[float32]{X: 0, Y: 0, Z: 1},
)
aspectRatio := float32(app.swapchainExtent.Width) / float32(app.swapchainExtent.Height)
- ubo.Proj.SetPerspective(math.Pi/4.0, aspectRatio, 0.1, 10)
+
+ near := float32(0.1)
+ far := float32(10.0)
+ fovy := math.Pi / 4.0
+
+ ubo.Proj.SetPerspective(fovy, aspectRatio, near, far)
err := writeData(app.uniformBuffersMemory[currentImage], 0, &ubo)
return err