RenderCore

Src/RenderCore/imp/cpp/Buffer.cpp

@@ -0,0 +1,124 @@
+// IAEngine: 2D Game Engine by IA
+// Copyright (C) 2025 IASoft (PVT) LTD (oss@iasoft.dev)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include <RenderCore/Buffer.hpp>
+
+namespace ia::iae
+{
+    RDC_Buffer::RDC_Buffer() : m_type(EType::NONE), m_size(0)
+    {
+    }
+
+    RDC_Buffer::RDC_Buffer(IN EType type, IN UINT32 size) : m_type(type), m_size(size)
+    {
+    }
+
+    RDC_StagingBuffer::RDC_StagingBuffer(IN UINT32 size) : RDC_Buffer(EType::NONE, size)
+    {
+        SDL_GPUTransferBufferCreateInfo stagingBufferCreateInfo{.usage = SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD,
+                                                                .size = size};
+        m_buffer = SDL_CreateGPUTransferBuffer(RDC_Device::GetHandle(), &stagingBufferCreateInfo);
+    }
+
+    RDC_StagingBuffer::~RDC_StagingBuffer()
+    {
+        SDL_ReleaseGPUTransferBuffer(RDC_Device::GetHandle(), m_buffer);
+    }
+
+    VOID RDC_StagingBuffer::CopyFrom(IN PCVOID data, IN UINT32 size)
+    {
+        IA_ASSERT(size <= m_size);
+        const auto mappedPtr = SDL_MapGPUTransferBuffer(RDC_Device::GetHandle(), m_buffer, false);
+        SDL_memcpy(mappedPtr, data, size);
+        SDL_UnmapGPUTransferBuffer(RDC_Device::GetHandle(), m_buffer);
+    }
+
+    RDC_DeviceLocalBuffer::RDC_DeviceLocalBuffer()
+    {
+    }
+
+    RDC_DeviceLocalBuffer::RDC_DeviceLocalBuffer(IN RDC_Buffer::EType type, IN UINT32 size) : RDC_Buffer(type, size)
+    {
+        SDL_GPUBufferCreateInfo createInfo{.size = size};
+        switch (type)
+        {
+        case RDC_Buffer::EType::NONE:
+            THROW_INVALID_DATA();
+            break;
+
+        case RDC_Buffer::EType::VERTEX:
+            createInfo.usage = SDL_GPU_BUFFERUSAGE_VERTEX;
+            break;
+
+        case RDC_Buffer::EType::INDEX:
+            createInfo.usage = SDL_GPU_BUFFERUSAGE_INDEX;
+            break;
+
+        case RDC_Buffer::EType::STORAGE:
+            createInfo.usage = SDL_GPU_BUFFERUSAGE_GRAPHICS_STORAGE_READ;
+            break;
+        }
+        m_buffer = SDL_CreateGPUBuffer(RDC_Device::GetHandle(), &createInfo);
+    }
+
+    RDC_DeviceLocalBuffer::~RDC_DeviceLocalBuffer()
+    {
+        if (m_buffer)
+            SDL_ReleaseGPUBuffer(RDC_Device::GetHandle(), m_buffer);
+    }
+
+    VOID RDC_DeviceLocalBuffer::CopyFrom(IN RDC_StagingBuffer *stagingBuffer, IN UINT32 size)
+    {
+        CopyFrom(stagingBuffer->m_buffer, size);
+    }
+
+    VOID RDC_DeviceLocalBuffer::CopyFrom(IN SDL_GPUTransferBuffer *stagingBuffer, IN UINT32 size)
+    {
+        const auto cmdBuffer = SDL_AcquireGPUCommandBuffer(RDC_Device::GetHandle());
+        const auto copyPass = SDL_BeginGPUCopyPass(cmdBuffer);
+
+        SDL_GPUTransferBufferLocation src{.transfer_buffer = stagingBuffer, .offset = 0};
+        SDL_GPUBufferRegion dst{.buffer = m_buffer, .offset = 0, .size = size};
+        SDL_UploadToGPUBuffer(copyPass, &src, &dst, false);
+
+        SDL_EndGPUCopyPass(copyPass);
+        SDL_SubmitGPUCommandBuffer(cmdBuffer);
+        SDL_WaitForGPUIdle(RDC_Device::GetHandle());
+    }
+
+    RDC_HostVisibleBuffer::RDC_HostVisibleBuffer(IN RDC_Buffer::EType type, IN UINT32 size)
+        : RDC_DeviceLocalBuffer(type, size)
+    {
+        SDL_GPUTransferBufferCreateInfo stagingBufferCreateInfo{.usage = SDL_GPU_TRANSFERBUFFERUSAGE_UPLOAD,
+                                                                .size = size};
+        m_stagingBuffer = SDL_CreateGPUTransferBuffer(RDC_Device::GetHandle(), &stagingBufferCreateInfo);
+    }
+
+    RDC_HostVisibleBuffer::~RDC_HostVisibleBuffer()
+    {
+        SDL_ReleaseGPUTransferBuffer(RDC_Device::GetHandle(), m_stagingBuffer);
+    }
+
+    VOID RDC_HostVisibleBuffer::CopyFrom(IN PCVOID data, IN UINT32 size)
+    {
+        IA_ASSERT(size <= m_size);
+        const auto mappedPtr = SDL_MapGPUTransferBuffer(RDC_Device::GetHandle(), m_stagingBuffer, false);
+        SDL_memcpy(mappedPtr, data, size);
+        SDL_UnmapGPUTransferBuffer(RDC_Device::GetHandle(), m_stagingBuffer);
+
+        RDC_DeviceLocalBuffer::CopyFrom(m_stagingBuffer, size);
+    }
+} // namespace ia::iae