Create shadow map sampler

gpu.c

@@ -828,8 +828,25 @@ void gpu_init(gpu_ctx_t *ctx, GLFWwindow *window, const char *name)
 	    &ctx->model_pipeline);
 	assert(result == VK_SUCCESS);
 
+	// Create shadow sampler
+	const VkSamplerCreateInfo shadow_sampler_config = {
+		.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO,
+		.magFilter = VK_FILTER_LINEAR,
+		.minFilter = VK_FILTER_LINEAR,
+		.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,
+		.addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,
+		.addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,
+		.compareEnable = VK_TRUE,
+		.compareOp = VK_COMPARE_OP_LESS_OR_EQUAL,
+		.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE,
+		.unnormalizedCoordinates = VK_FALSE,
+	};
+	result = vkCreateSampler(
+	    ctx->dev, &shadow_sampler_config, nullptr, &ctx->shadow_sampler);
+	assert(result == VK_SUCCESS);
+
 	// Create framebuffers
-	const VkFramebufferCreateInfo shadow_framebuffer_config = {
+	const VkFramebufferCreateInfo shadow_framebuf_config = {
 		.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO,
 		.renderPass = ctx->shadow_pass,
 		.attachmentCount = 1,
@@ -839,8 +856,7 @@ 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_framebuf_config, nullptr, &ctx->shadow_framebuf);
 	assert(result == VK_SUCCESS);
 	for (unsigned i = 0; i < ctx->swapchain_img_count; ++i) {
 		VkImageView attachments[] = {
@@ -960,6 +976,8 @@ void gpu_cleanup(const gpu_ctx_t *ctx)
 	vkDestroyImage(ctx->dev, ctx->depth_img, nullptr);
 	vkFreeMemory(ctx->dev, ctx->depth_mem, nullptr);
 
+	vkDestroySampler(ctx->dev, ctx->shadow_sampler, nullptr);
+
 	vkDestroyFramebuffer(ctx->dev, ctx->shadow_framebuf, nullptr);
 	for (unsigned i = 0; i < ctx->swapchain_img_count; ++i) {
 		vkDestroyFramebuffer(ctx->dev, ctx->framebuffers[i], nullptr);

gpu.h

@@ -25,6 +25,7 @@ typedef struct {
 	VkImage depth_img;
 	VkDeviceMemory depth_mem;
 	VkImageView depth_view;
+	VkSampler shadow_sampler;
 	VkFramebuffer shadow_framebuf;
 	VkFramebuffer framebuffers[MAX_FRAMES_IN_FLIGHT];
 	VkShaderModule floor_vert_shader;