texture arrays

engine/xe_descriptors.cpp

@@ -10,9 +10,9 @@ DescriptorSetLayout::Builder &DescriptorSetLayout::Builder::addBinding(
     uint32_t binding,
     VkDescriptorType descriptorType,
     VkShaderStageFlags stageFlags,
-    VkSampler *sampler) {
+    VkSampler *sampler,
+    uint32_t count) {
   assert(bindings.count(binding) == 0 && "Binding already in use");
-  uint32_t count = 1;
   VkDescriptorSetLayoutBinding layoutBinding{};
   layoutBinding.binding = binding;
   layoutBinding.descriptorType = descriptorType;
@@ -167,6 +167,24 @@ DescriptorWriter &DescriptorWriter::writeImage(
   return *this;
 }
 
+DescriptorWriter &DescriptorWriter::writeImageArray(
+  uint32_t binding, std::vector<VkDescriptorImageInfo> *imageInfos) {
+  assert(setLayout.bindings.count(binding) == 1 && "Layout does not contain specified binding");
+
+  auto &bindingDescription = setLayout.bindings[binding];
+  
+  VkWriteDescriptorSet write{};
+  write.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
+  write.descriptorType = bindingDescription.descriptorType;
+  write.dstBinding = binding;
+  write.dstArrayElement = 0;
+  write.pImageInfo = imageInfos->data();
+  write.descriptorCount = imageInfos->size();
+
+  writes.push_back(write);
+  return *this;
+}
+
 bool DescriptorWriter::build(VkDescriptorSet &set) {
   bool success = pool.allocateDescriptor(setLayout.getDescriptorSetLayout(), set);
   if (!success) {

engine/xe_descriptors.hpp

@@ -19,7 +19,8 @@ class DescriptorSetLayout {
         uint32_t binding,
         VkDescriptorType descriptorType,
         VkShaderStageFlags stageFlags,
-        VkSampler *sampler);
+        VkSampler *sampler,
+        uint32_t count);
     std::unique_ptr<DescriptorSetLayout> build() const;
 
    private:
@@ -90,6 +91,7 @@ class DescriptorWriter {
 
   DescriptorWriter &writeBuffer(uint32_t binding, VkDescriptorBufferInfo *bufferInfo);
   DescriptorWriter &writeImage(uint32_t binding, VkDescriptorImageInfo *imageInfo);
+  DescriptorWriter &writeImageArray(uint32_t binding, std::vector<VkDescriptorImageInfo> *imageInfos);
 
   bool build(VkDescriptorSet &set);
   void overwrite(VkDescriptorSet &set);

engine/xe_render_system.cpp

@@ -8,6 +8,7 @@ RenderSystem::RenderSystem(
   std::string frag,
   std::map<uint32_t, uint32_t> uniformBindings,
   std::map<uint32_t, Image*> imageBindings,
+  std::map<uint32_t, std::vector<Image*>> imageArrayBindings,
   uint32_t pushCunstantDataSize,
   bool cullingEnabled,
   std::vector<VkVertexInputAttributeDescription> attributeDescptions,
@@ -17,7 +18,8 @@ RenderSystem::RenderSystem(
     xeDescriptorPool{xeEngine.xeDescriptorPool},
     pushCunstantDataSize{pushCunstantDataSize},
     uniformBindings{uniformBindings},
-    imageBindings{imageBindings} {
+    imageBindings{imageBindings},
+    imageArrayBindings{imageArrayBindings} {
   createDescriptorSetLayout();
   createUniformBuffers();
   createDescriptorSets();
@@ -33,11 +35,15 @@ void RenderSystem::createDescriptorSetLayout() {
   DescriptorSetLayout::Builder builder{xeDevice};
   
   for ( const auto &[binding, size]: uniformBindings) {
-    builder.addBinding(binding, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, nullptr);
+    builder.addBinding(binding, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, nullptr, 1);
   }
 
   for ( const auto &[binding, image]: imageBindings) {
-    builder.addBinding(binding, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, &(image->textureSampler));
+    builder.addBinding(binding, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, &(image->textureSampler), 1);
+  }
+
+  for ( const auto &[binding, images]: imageArrayBindings) {
+    builder.addBinding(binding, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 0, images.size());
   }
 
   xeDescriptorSetLayout = builder.build();
@@ -88,6 +94,18 @@ void RenderSystem::updateDescriptorSet(int frameIndex, bool allocate) {
     writer.writeImage(binding, &imageInfo);
   }
 
+  std::vector<VkDescriptorImageInfo> imageInfos{};
+  for ( const auto &[binding, images]: imageArrayBindings) {
+    for( const auto &image: images) {
+      VkDescriptorImageInfo imageInfo{};
+      imageInfo.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
+      imageInfo.imageView = image->textureImageView;
+      imageInfo.sampler = image->textureSampler;
+      imageInfos.push_back(imageInfo);
+    }
+    writer.writeImageArray(binding, &imageInfos);
+  }
+
   if (allocate) {
     writer.build(descriptorSets[frameIndex]);
   } else {
@@ -183,6 +201,11 @@ void RenderSystem::loadTexture(uint32_t binding, Image *image) {
   updateDescriptorSet(xeRenderer.getFrameIndex(), false);
 }
 
+void RenderSystem::loadTextureArray(uint32_t binding, std::vector<Image*>& images) {
+  imageArrayBindings[binding] = images;
+  updateDescriptorSet(xeRenderer.getFrameIndex(), false);
+}
+
 void RenderSystem::render(GameObject &gameObject) {
 
   gameObject.model->bind(xeRenderer.getCurrentCommandBuffer());

engine/xe_render_system.hpp

@@ -54,19 +54,25 @@ class RenderSystem {
           return *this;
         }
 
+        Builder& addTextureArrayBinding(uint32_t binding, std::vector<Image*>& image) {
+          imageArrayBindings[binding] = image;
+          return *this;
+        }
+
         Builder& setCulling(bool enabled) {
           cullingEnabled = enabled;
           return *this;
         }
 
         std::unique_ptr<RenderSystem> build() {
-          return std::make_unique<RenderSystem>(xeEngine, std::move(vert), std::move(frag), std::move(uniformBindings), std::move(imageBindings), std::move(pushCunstantDataSize), std::move(cullingEnabled), std::move(attributeDescptions), std::move(vertexSize));
+          return std::make_unique<RenderSystem>(xeEngine, std::move(vert), std::move(frag), std::move(uniformBindings), std::move(imageBindings), std::move(imageArrayBindings), std::move(pushCunstantDataSize), std::move(cullingEnabled), std::move(attributeDescptions), std::move(vertexSize));
         }
 
       private:
 
         std::map<uint32_t, uint32_t> uniformBindings{};
         std::map<uint32_t, Image*> imageBindings{};
+        std::map<uint32_t, std::vector<Image*>> imageArrayBindings{};
         uint32_t pushCunstantDataSize{0};
 
         std::vector<VkVertexInputAttributeDescription> attributeDescptions{};
@@ -86,6 +92,7 @@ class RenderSystem {
       std::string frag,
       std::map<uint32_t, uint32_t> uniformBindings,
       std::map<uint32_t, Image*> imageBindings,
+      std::map<uint32_t, std::vector<Image*>> imageArrayBindings,
       uint32_t pushCunstantDataSize,
       bool cullingEnabled,
       std::vector<VkVertexInputAttributeDescription> attributeDescptions,
@@ -101,6 +108,7 @@ class RenderSystem {
     void loadPushConstant(void *pushConstantData);
     void loadUniformObject(uint32_t binding, void *uniformBufferData);
     void loadTexture(uint32_t binding, Image *image);
+    void loadTextureArray(uint32_t binding, std::vector<Image*> &images);
     void render(GameObject &gameObject);
     void stop();
 
@@ -123,6 +131,7 @@ class RenderSystem {
     std::map<uint32_t, std::vector<std::unique_ptr<Buffer>>> uboBuffers{};
     std::map<uint32_t, uint32_t> uniformBindings;
     std::map<uint32_t, Image*> imageBindings;
+    std::map<uint32_t, std::vector<Image*>> imageArrayBindings{};
     std::vector<VkDescriptorSet> descriptorSets;
 
     uint32_t pushCunstantDataSize;

res/shaders/simple_shader.frag

@@ -2,6 +2,7 @@
 
 layout (location = 0) in vec3 fragColor;
 layout (location = 1) in vec2 fragUv;
+layout (location = 2) in float fragTex;
 
 layout (location = 0) out vec4 outColor;
 
@@ -10,12 +11,7 @@ layout (binding = 0) uniform GlobalUbo {
   vec3 directionToLight;
 } ubo;
 
-layout (binding = 2) uniform Deez {
-  mat4 projectionViewMatrix;
-  vec3 directionToLight;
-} deez;
-
-layout (binding = 1) uniform sampler2D texSampler;
+layout (binding = 1) uniform sampler2D texSampler[2];
 
 layout(push_constant) uniform Push {
   mat4 transform;
@@ -23,5 +19,5 @@ layout(push_constant) uniform Push {
 } push;
 
 void main() {
-  outColor = mix(texture(texSampler, fragUv), vec4(fragColor, 1.0), .1);
+  outColor = mix(texture(texSampler[int(fragTex)], fragUv), vec4(fragColor, 1.0), .1);
 }

res/shaders/simple_shader.vert

@@ -3,20 +3,17 @@
 layout (location = 0) in vec3 position;
 layout (location = 1) in vec3 normal;
 layout (location = 2) in vec2 uv;
+layout (location = 3) in float tex;
 
 layout (location = 0) out vec3 fragColor;
 layout (location = 1) out vec2 fragUv;
+layout (location = 2) out float fragTex;
 
 layout (binding = 0) uniform GlobalUbo {
   mat4 projectionViewMatrix;
   vec3 directionToLight;
 } ubo;
 
-layout (binding = 2) uniform Deez {
-  mat4 projectionViewMatrix;
-  vec3 directionToLight;
-} deez;
-
 layout (push_constant) uniform Push {
   mat4 modelMatrix;
   mat4 normalMatrix;
@@ -33,4 +30,5 @@ void main() {
 
   fragColor = lightIntensity * vec3(1);
   fragUv = uv;
+  fragTex = tex;
 }

src/chunk.cpp

@@ -75,7 +75,7 @@ std::shared_ptr<xe::Model> Chunk::getMesh() {
     delete chunkMesh.get();
     xe::Model::Builder builder{};
     builder.vertexData = vertexData;
-    builder.vertexSize = 32;
+    builder.vertexSize = 36;
     chunkMesh = std::make_shared<xe::Model>(xe::Engine::getInstance()->getDevice(), builder);
   }
   return chunkMesh;
@@ -129,6 +129,7 @@ void Chunk::addVerticies(uint8_t side, int32_t x, int32_t y, int32_t z) {
     vertexData.push_back(nm[side][2]);
     vertexData.push_back(uv[i][0]);
     vertexData.push_back(uv[i][1]);
+    vertexData.push_back(0.f);
   }
 }
 

src/first_app.cpp

@@ -11,9 +11,12 @@ FirstApp::~FirstApp() {}
 
 void FirstApp::run() {
 
-  std::shared_ptr<xe::Image> image = xeEngine.loadImageFromFile("res/image/dirt.jpg"); 
+  std::shared_ptr<xe::Image> dirt = xeEngine.loadImageFromFile("res/image/dirt.jpg"); 
+  std::shared_ptr<xe::Image> grass = xeEngine.loadImageFromFile("res/image/grass.png"); 
 
-  SimpleRenderer renderer{xeEngine, image.get()};
+  std::vector<xe::Image*> images = {dirt.get(), grass.get()};
+
+  SimpleRenderer renderer{xeEngine, images};
 
   xe::Sound sound{"res/sound/when_the_world_ends.wav"};
   sound.setLooping(true);
@@ -32,7 +35,7 @@ void FirstApp::run() {
     xeEngine.getCamera().setViewYXZ(viewerObject.transform.translation, viewerObject.transform.rotation);
 
     if(xeEngine.beginFrame()) {
-      renderer.render(gameObjects, xeEngine.getCamera(), image.get());
+      renderer.render(gameObjects, xeEngine.getCamera());
       xeEngine.endFrame();
     }
 

src/simple_renderer.cpp

@@ -2,22 +2,23 @@
 
 namespace app {
 
-SimpleRenderer::SimpleRenderer(xe::Engine &xeEngine, xe::Image *xeImage) {
+SimpleRenderer::SimpleRenderer(xe::Engine &xeEngine, std::vector<xe::Image*> &images) {
   xeRenderSystem = xe::RenderSystem::Builder(xeEngine, "res/shaders/simple_shader.vert.spv", "res/shaders/simple_shader.frag.spv")
     .addVertexBinding(0, 3, 0) // position
     .addVertexBinding(1, 3, 12) // normal
     .addVertexBinding(2, 2, 24) // uvs
-    .setVertexSize(32)
+    .addVertexBinding(3, 1, 32) // texture
+    .setVertexSize(36)
     .addPushConstant(sizeof(PushConstant))
     .addUniformBinding(0, sizeof(UniformBuffer))
-    .addTextureBinding(1, xeImage)
+    .addTextureArrayBinding(1, images)
     .setCulling(true)
     .build();
 }
 
-void SimpleRenderer::render(std::vector<xe::GameObject> &gameObjects, xe::Camera &xeCamera, xe::Image *xeImage) {
+void SimpleRenderer::render(std::vector<xe::GameObject> &gameObjects, xe::Camera &xeCamera) {
 
-  xeRenderSystem->loadTexture(1, xeImage);
+  // xeRenderSystem->loadTexture(1, xeImage);
 
   xeRenderSystem->start();
 

src/simple_renderer.hpp

@@ -20,14 +20,14 @@ class SimpleRenderer {
 
   public:
 
-    SimpleRenderer(xe::Engine &xeEngine, xe::Image *xeImage);
+    SimpleRenderer(xe::Engine &xeEngine, std::vector<xe::Image*> &images);
 
     ~SimpleRenderer() {};
 
     SimpleRenderer(const SimpleRenderer&) = delete;
     SimpleRenderer operator=(const SimpleRenderer&) = delete;
 
-    void render(std::vector<xe::GameObject> &gameObjects, xe::Camera &xeCamera, xe::Image *xeImage);
+    void render(std::vector<xe::GameObject> &gameObjects, xe::Camera &xeCamera);
 
   private:
     std::unique_ptr<xe::RenderSystem> xeRenderSystem;