Function PrepareScatchBuffer

engine/graphics/src/vulkan/graphics_vulkan.cpp:3081–3103

    }

    static void PrepareScatchBuffer(VulkanContext* context, ScratchBuffer* scratchBuffer, VulkanProgram* program_ptr)
    {
        const uint32_t num_uniform_buffers = program_ptr->m_UniformBufferCount;
        const bool resize_scratch_buffer   = program_ptr->m_UniformDataSizeAligned > (scratchBuffer->m_DeviceBuffer.m_MemorySize - scratchBuffer->m_MappedDataCursor);

        if (resize_scratch_buffer)
        {
            // Double the buffer size, or grow to fit the current program's needs,
            // whichever is larger. This avoids repeated small resizes when many
            // materials with large uniform blocks are drawn in the same frame.
            const uint32_t current_size = scratchBuffer->m_DeviceBuffer.m_MemorySize;
            const uint32_t needed_size  = scratchBuffer->m_MappedDataCursor + program_ptr->m_UniformDataSizeAligned;
            const uint32_t new_size     = dmMath::Max(current_size * 2, needed_size);
            VkResult res = ResizeScratchBuffer(context, new_size, scratchBuffer);
            CHECK_VK_ERROR(res);
        }

        // The dynamic offset buffer is pre-allocated at context init to
        // MAX_SET_COUNT * MAX_BINDINGS_PER_SET_COUNT, which is the upper bound
        // for any program. Assert rather than silently reallocating.
        assert(context->m_DynamicOffsetBuffer != 0x0);
        assert(context->m_DynamicOffsetBufferSize >= num_uniform_buffers);
    }

    static void DrawSetupCompute(VulkanContext* context, VkCommandBuffer vk_command_buffer, ScratchBuffer* scratchBuffer)
    {