Create shadow pipeline

gpu.c

@@ -418,7 +418,7 @@ void gpu_init(gpu_ctx_t *ctx, GLFWwindow *window, const char *name)
 		.maxDepth = 1.0,
 	};
 	const VkRect2D scissor = { .extent = ctx->swapchain_extent };
-	VkPipelineViewportStateCreateInfo viewport_config = {
+	const VkPipelineViewportStateCreateInfo viewport_config = {
 		.sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO,
 		.viewportCount = 1,
 		.pViewports = &viewport,
@@ -712,6 +712,73 @@ void gpu_init(gpu_ctx_t *ctx, GLFWwindow *window, const char *name)
 		.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
 	};
 
+	// Create model pipeline layout
+	const VkPipelineLayoutCreateInfo model_pipeline_layout_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
+		.setLayoutCount = 1,
+		.pSetLayouts = &ctx->desc_set_layout,
+		.pushConstantRangeCount = 1,
+		.pPushConstantRanges = &push_constant_range,
+	};
+	result = vkCreatePipelineLayout(
+	    ctx->dev, &model_pipeline_layout_config, nullptr,
+	    &ctx->model_pipeline_layout);
+	assert(result == VK_SUCCESS);
+
+	// Create shadow pipeline
+	const VkPipelineViewportStateCreateInfo shadow_viewport_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO,
+		.viewportCount = 1,
+		.pViewports = &(VkViewport) {
+			.width = SHADOW_IMG_SIZE,
+			.height = SHADOW_IMG_SIZE,
+			.minDepth = 0.0,
+			.maxDepth = 1.0,
+		},
+		.scissorCount = 1,
+		.pScissors = &(VkRect2D) {
+			.extent = {
+				.width = SHADOW_IMG_SIZE,
+				.height = SHADOW_IMG_SIZE,
+			},
+		},
+	};
+	const VkPipelineShaderStageCreateInfo shadow_shader_stages[] = {
+		{
+		    .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
+		    .stage = VK_SHADER_STAGE_VERTEX_BIT,
+		    .module = ctx->model_vert_shader,
+		    .pName = "main",
+		},
+	};
+	const VkPipelineRasterizationStateCreateInfo shadow_rasterizer_config = {
+		.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO,
+		.depthClampEnable = VK_FALSE,
+		.rasterizerDiscardEnable = VK_FALSE,
+		.polygonMode = VK_POLYGON_MODE_FILL,
+		.lineWidth = 1.0f,
+		.cullMode = VK_CULL_MODE_NONE,
+		.frontFace = VK_FRONT_FACE_CLOCKWISE,
+	};
+	const VkGraphicsPipelineCreateInfo shadow_pipeline_config = {
+		.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO,
+		.stageCount = NELEMS(shadow_shader_stages),
+		.pStages = shadow_shader_stages,
+		.pVertexInputState = &vertex_input_config,
+		.pInputAssemblyState = &input_assembly_config,
+		.pViewportState = &shadow_viewport_config,
+		.pRasterizationState = &shadow_rasterizer_config,
+		.pMultisampleState = &multisampling_config,
+		.layout = ctx->model_pipeline_layout,
+		.renderPass = ctx->shadow_pass,
+		.subpass = 0,
+		.pDepthStencilState = &depth_stencil_config,
+	};
+	result = vkCreateGraphicsPipelines(
+	    ctx->dev, VK_NULL_HANDLE, 1, &shadow_pipeline_config, nullptr,
+	    &ctx->shadow_pipeline);
+	assert(result == VK_SUCCESS);
+
 	// Create model pipeline
 	const VkPipelineShaderStageCreateInfo model_shader_stages[] = {
 		{
@@ -736,20 +803,9 @@ void gpu_init(gpu_ctx_t *ctx, GLFWwindow *window, const char *name)
 		.cullMode = VK_CULL_MODE_BACK_BIT,
 		.frontFace = VK_FRONT_FACE_CLOCKWISE,
 	};
-	const VkPipelineLayoutCreateInfo model_pipeline_layout_config = {
-		.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
-		.setLayoutCount = 1,
-		.pSetLayouts = &ctx->desc_set_layout,
-		.pushConstantRangeCount = 1,
-		.pPushConstantRanges = &push_constant_range,
-	};
-	result = vkCreatePipelineLayout(
-	    ctx->dev, &model_pipeline_layout_config, nullptr,
-	    &ctx->model_pipeline_layout);
-	assert(result == VK_SUCCESS);
 	const VkGraphicsPipelineCreateInfo model_pipeline_config = {
 		.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO,
-		.stageCount = 2,
+		.stageCount = NELEMS(model_shader_stages),
 		.pStages = model_shader_stages,
 		.pVertexInputState = &vertex_input_config,
 		.pInputAssemblyState = &input_assembly_config,
@@ -778,8 +834,8 @@ void gpu_init(gpu_ctx_t *ctx, GLFWwindow *window, const char *name)
 		.layers = 1,
 	};
 	result = vkCreateFramebuffer(
-		ctx->dev, &shadow_framebuffer_config, nullptr,
-		&ctx->shadow_framebuf);
+	    ctx->dev, &shadow_framebuffer_config, nullptr,
+	    &ctx->shadow_framebuf);
 	assert(result == VK_SUCCESS);
 	for (unsigned i = 0; i < ctx->swapchain_img_count; ++i) {
 		VkImageView attachments[] = {
@@ -878,6 +934,7 @@ void gpu_cleanup(const gpu_ctx_t *ctx)
 	vkDestroyPipeline(ctx->dev, ctx->floor_pipeline, nullptr);
 	vkDestroyPipelineLayout(ctx->dev, ctx->floor_pipeline_layout, nullptr);
 
+	vkDestroyPipeline(ctx->dev, ctx->shadow_pipeline, nullptr);
 	vkDestroyPipeline(ctx->dev, ctx->model_pipeline, nullptr);
 	vkDestroyPipelineLayout(ctx->dev, ctx->model_pipeline_layout, nullptr);
 	vkDestroyDescriptorPool(ctx->dev, ctx->desc_pool, nullptr);

gpu.h

@@ -37,6 +37,7 @@ typedef struct {
 	VkPipelineLayout floor_pipeline_layout;
 	VkPipeline floor_pipeline;
 	VkPipelineLayout model_pipeline_layout;
+	VkPipeline shadow_pipeline;
 	VkPipeline model_pipeline;
 	VkCommandPool cmd_pool;
 	VkCommandBuffer cmd_buf;