creating and destroying buffers

rendering_api/vulkan/src/buffers/vulkan_buffer.c

@@ -0,0 +1,56 @@
+#include "vulkan_buffer.h"
+#include "core/buffers/gryphn_buffer.h"
+#include "core/output_device/gryphn_output_device.h"
+#include "output_device/vulkan_output_devices.h"
+#include "output_device/vulkan_physical_device.h"
+
+VkBufferUsageFlags vkGryphnBufferType(gnBufferType type) {
+switch (type) {
+case GN_VERTEX_BUFFER: return VK_BUFFER_USAGE_VERTEX_BUFFER_BIT;
+}
+}
+
+gnReturnCode gnCreateBufferFn(gnBufferHandle buffer, gnOutputDeviceHandle device, gnBufferInfo info) {
+    buffer->buffer = malloc(sizeof(struct gnPlatformBuffer_t));
+    VkBufferCreateInfo bufferInfo = {
+        .sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
+        .size = info.size,
+        .usage = vkGryphnBufferType(info.type),
+        .sharingMode = VK_SHARING_MODE_EXCLUSIVE
+    };
+
+    if (vkCreateBuffer(device->outputDevice->device, &bufferInfo, NULL, &buffer->buffer->buffer) != VK_SUCCESS)
+        return GN_FAILED_TO_CREATE_BUFFER;
+
+    VkMemoryRequirements bufferRequirements;
+    vkGetBufferMemoryRequirements(device->outputDevice->device, buffer->buffer->buffer, &bufferRequirements);
+
+    VkPhysicalDeviceMemoryProperties memoryProperties;
+    vkGetPhysicalDeviceMemoryProperties(device->physicalDevice.physicalDevice->device, &memoryProperties);
+
+    VkMemoryAllocateInfo memoryAllocateInfo = {
+        .sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
+        .allocationSize = bufferRequirements.size,
+    };
+
+    gnBool foundMemory = gnFalse;
+    VkMemoryPropertyFlagBits flags = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
+    for (uint32_t i = 0; i < memoryProperties.memoryTypeCount; i++) {
+        if ((bufferRequirements.memoryTypeBits & (1 << i)) && (memoryProperties.memoryTypes[i].propertyFlags & flags) == flags) {
+            memoryAllocateInfo.memoryTypeIndex = i;
+            foundMemory = gnTrue;
+        }
+    } // this whole thing was adapted from vulkan-tutorial.com
+    if (!foundMemory) return GN_FAILED_TO_ALLOCATE_MEMORY;
+
+    if (vkAllocateMemory(device->outputDevice->device, &memoryAllocateInfo, NULL, &buffer->buffer->bufferMemory) != VK_SUCCESS) {
+        return GN_FAILED_TO_ALLOCATE_MEMORY;
+    }
+    vkBindBufferMemory(device->outputDevice->device, buffer->buffer->buffer, buffer->buffer->bufferMemory, 0);
+    return GN_SUCCESS;
+}
+void gnDestroyBufferFn(gnBufferHandle buffer) {
+    vkDestroyBuffer(buffer->device->outputDevice->device, buffer->buffer->buffer, NULL);
+    vkFreeMemory(buffer->device->outputDevice->device, buffer->buffer->bufferMemory, NULL);
+    free(buffer->buffer);
+}