Exemplo n.º 1
0
        // Record a buffer copy operation into the command buffer
        public void RecordBufferCopy(VkCommandBuffer cmd, ResourceType?dstBufferType, ulong dataSize,
                                     VkBuffer srcBuffer, ulong srcOffset,
                                     VkBuffer dstBuffer, ulong dstOffset)
        {
            // Get pipeline barrier values
            VkPipelineStageFlags srcStage = 0, dstStage = 0;
            VkAccessFlags        srcAccess = 0, dstAccess = 0;

            if (dstBufferType.HasValue)
            {
                GetBarrierStages(dstBufferType.Value, out srcStage, out dstStage);
                GetAccessFlags(dstBufferType.Value, out srcAccess, out dstAccess);
            }

            // Start command
            VkCommandBufferBeginInfo cbbi = new(VkCommandBufferUsageFlags.OneTimeSubmit, null);

            cmd.BeginCommandBuffer(&cbbi);

            // Src barrier
            if (dstBufferType.HasValue)
            {
                VkBufferMemoryBarrier srcBarrier = new(
                    srcAccessMask : srcAccess,
                    dstAccessMask : VkAccessFlags.TransferWrite,
                    srcQueueFamilyIndex : VkConstants.QUEUE_FAMILY_IGNORED,
                    dstQueueFamilyIndex : VkConstants.QUEUE_FAMILY_IGNORED,
                    buffer : dstBuffer,
                    offset : dstOffset,
                    size : dataSize
                    );
                cmd.CmdPipelineBarrier(
                    srcStage,
                    VkPipelineStageFlags.Transfer,
                    VkDependencyFlags.ByRegion,
                    0, null,
                    1, &srcBarrier,
                    0, null
                    );
            }

            // Create copy command
            VkBufferCopy bc = new(srcOffset, dstOffset, dataSize);

            cmd.CmdCopyBuffer(srcBuffer, dstBuffer, 1, &bc);

            // Last barrier
            if (dstBufferType.HasValue)
            {
                VkBufferMemoryBarrier dstBarrier = new(
                    srcAccessMask : VkAccessFlags.TransferWrite,
                    dstAccessMask : dstAccess,
                    srcQueueFamilyIndex : VkConstants.QUEUE_FAMILY_IGNORED,
                    dstQueueFamilyIndex : VkConstants.QUEUE_FAMILY_IGNORED,
                    buffer : dstBuffer,
                    offset : dstOffset,
                    size : dataSize
                    );
                cmd.CmdPipelineBarrier(
                    VkPipelineStageFlags.Transfer,
                    dstStage,
                    VkDependencyFlags.ByRegion,
                    0, null,
                    1, &dstBarrier,
                    0, null
                    );
            }

            // End
            cmd.EndCommandBuffer().Throw("Failed to record buffer upload commands");
        }