index_buffer.c

#include <kiba/renderer/vulkan/index_buffer.h>
 
#include <kiba/core/memory.h>
#include <kiba/renderer/vulkan/buffer.h>
 
#include <kiba/platform/filesystem.h>
 
b8 vulkan_index_buffer_create(vulkan_context *context) {
    // const u32     indicies[] = {0, 1, 2, 2, 3, 0, 4, 5, 6, 6, 7, 4};
    context->index_count = 0;
 
    file_handle file;
    // if (!filesystem_open(&file, "./assets/models/sphere_indices", true, FILE_MODE_READ)) {
    if (!filesystem_open(&file, "./assets/models/viking_room_indices", true, FILE_MODE_READ)) {
        KB_ERROR("could not open indices file");
        return false;
    }
    b8    ret = false;
    usize file_size;
    KB_ASSERT(filesystem_size(&file, &file_size), "must work");
 
    VkDeviceSize size    = file_size;
    vulkan_buffer staging;
    if (vulkan_buffer_create(context,
                             size,
                             VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
                             VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
                             &staging)) {
        usize bytes_read;
        void *data;
        VK_CALL_B8(vkMapMemory(context->device.logical, staging.memory, 0, size, 0, &data));
        if (filesystem_read_all(&file, file_size, data, &bytes_read)) {
            if (vulkan_buffer_create(context,
                                     size,
                                     VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_INDEX_BUFFER_BIT,
                                     VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
                                     &context->index_data)) {
                ret                  = vulkan_buffer_copy(context, &staging, &context->index_data, size);
                context->index_count = (u32) (bytes_read / sizeof(u32));
            }
        }
        vkUnmapMemory(context->device.logical, staging.memory);
        vulkan_buffer_destroy(context, &staging);
    }
    filesystem_close(&file);
    return ret;
}
 
void vulkan_index_buffer_destroy(vulkan_context *context) { vulkan_buffer_destroy(context, &context->index_data); }