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MobileGL/MobileGL/MG_Backend/DirectVulkan/DirectVulkan.cpp
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// MobileGL - MobileGL/MG_Backend/DirectVulkan/DirectVulkan.cpp
// Copyright (c) 2025-2026 MobileGL-Dev
// Licensed under the GNU Lesser General Public License v3.0:
// https://www.gnu.org/licenses/gpl-3.0.txt
// https://www.gnu.org/licenses/lgpl-3.0.txt
// SPDX-License-Identifier: LGPL-3.0-only
// End of Source File Header
#include "DirectVulkan.h"
#include "MG_State/GLState/Core.h"
#include "MG_Impl/GLImpl/Framebuffer/GL_Framebuffer.h"
namespace MobileGL::MG_Backend::DirectVulkan {
UniquePtr<VulkanRenderer> pVulkanRenderer = nullptr;
void ClearBufferfi(GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::ClearBufferfi called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::ClearBufferfi called with null GL context");
pVulkanRenderer->ClearBufferfi(buffer, drawbuffer, depth, stencil);
}
void ClearBufferfv(GLenum buffer, GLint drawbuffer, const GLfloat* value) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::ClearBufferfv called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::ClearBufferfv called with null GL context");
pVulkanRenderer->ClearBufferfv(buffer, drawbuffer, value);
}
void ClearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint* value) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::ClearBufferuiv called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::ClearBufferuiv called with null GL context");
pVulkanRenderer->ClearBufferuiv(buffer, drawbuffer, value);
}
void ClearBufferiv(GLenum buffer, GLint drawbuffer, const GLint* value) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::ClearBufferiv called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::ClearBufferiv called with null GL context");
pVulkanRenderer->ClearBufferiv(buffer, drawbuffer, value);
}
void MultiDrawElementsIndirect(GLenum mode, GLenum type, const void* indirect, GLsizei drawcount, GLsizei stride) {}
void MultiDrawArraysIndirect(GLenum mode, const void* indirect, GLsizei drawcount, GLsizei stride) {}
void DrawRangeElementsBaseVertex(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type,
const void* indices, GLint basevertex) {}
void DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const void* indices) {}
void DrawElementsInstancedBaseVertexBaseInstance(GLenum mode, GLsizei count, GLenum type, const void* indices,
GLsizei instancecount, GLint basevertex, GLuint baseinstance) {}
void DrawElementsInstancedBaseVertex(GLenum mode, GLsizei count, GLenum type, const void* indices,
GLsizei instancecount, GLint basevertex) {}
void DrawElementsInstancedBaseInstance(GLenum mode, GLsizei count, GLenum type, const void* indices,
GLsizei instancecount, GLuint baseinstance) {}
void DrawElementsInstanced(GLenum mode, GLsizei count, GLenum type, const void* indices, GLsizei instancecount) {}
void DrawElementsIndirect(GLenum mode, GLenum type, const void* indirect) {}
void DrawArraysInstancedBaseInstance(GLenum mode, GLint first, GLsizei count, GLsizei instancecount,
GLuint baseinstance) {}
void DrawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei instancecount) {}
void DrawArraysIndirect(GLenum mode, const void* indirect) {}
void CopyTexImage2D(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width,
GLsizei height, GLint border) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::CopyTexImage2D called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::CopyTexImage2D called with null GL context");
pVulkanRenderer->CopyTexSubImage2D(target, level, 0, 0, x, y, width, height);
}
void CopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width,
GLsizei height) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::CopyTexSubImage2D called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::CopyTexSubImage2D called with null GL context");
pVulkanRenderer->CopyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);
}
void GenerateMipmap(GLenum target) {}
void ReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void* pixels) {}
void GetTexImage(GLenum target, GLint level, GLenum format, GLenum type, GLvoid* pixels) {}
void Clear(GLbitfield mask) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::Clear called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::Clear called with null GL context");
pVulkanRenderer->Clear(mask);
}
void DrawArrays(GLenum mode, GLint first, GLsizei count) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::DrawArrays called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::DrawArrays called with null GL context");
DrawCmd payload{};
payload.mode = mode;
payload.params.firstVertex = first;
payload.params.vertexCount = count;
pVulkanRenderer->DrawArrays(payload);
}
void DrawElements(GLenum mode, GLsizei count, GLenum type, const void* indices) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::DrawElements called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::DrawElements called with null GL context");
DrawIndexedCmd payload{};
payload.mode = mode;
payload.indexBufferView.indexType = type;
payload.indexBufferView.indexByteOffset = reinterpret_cast<SizeT>(indices);
payload.indexBufferView.indexByteSize = count * MG_Util::GetGLTypeSize(type);
payload.params.indexCount = count;
payload.params.instanceCount = 1;
pVulkanRenderer->DrawElements(payload);
}
void MultiDrawElements(GLenum mode, const GLsizei* count, GLenum type, const GLvoid* const* indices,
GLsizei drawcount) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::MultiDrawElements called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::MultiDrawElements called with null GL context");
// Vector<DrawElementCmd> cmds;
// cmds.reserve(static_cast<SizeT>(drawcount));
// for (GLsizei i = 0; i < drawcount; ++i) {
// if (count[i] == 0) {
// continue;
// }
//
// DrawElementCmd payload{};
// payload.mode = mode;
// payload.firstVertex = 0;
// payload.indexCount = count[i];
// payload.indexType = type;
// payload.indexByteOffset = reinterpret_cast<SizeT>(indices[i]);
// cmds.push_back(payload);
// }
//
// if (cmds.empty()) {
// return;
// }
// pVulkanRenderer->MultiDrawElements(cmds);
}
void DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type, const GLvoid* indices, GLint basevertex) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::DrawElementsBaseVertex called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::DrawElementsBaseVertex called with null GL context");
DrawIndexedCmd payload{};
payload.mode = mode;
payload.indexBufferView.indexType = type;
payload.indexBufferView.indexByteOffset = reinterpret_cast<SizeT>(indices);
payload.indexBufferView.indexByteSize = count * MG_Util::GetGLTypeSize(type);
payload.params.indexCount = count;
payload.params.instanceCount = 1;
payload.params.firstIndex = 0;
payload.params.vertexOffset = basevertex;
payload.params.firstInstance = 0;
pVulkanRenderer->DrawElements(payload);
}
void MultiDrawElementsBaseVertex(GLenum mode, const GLsizei* count, GLenum type, const GLvoid* const* indices,
GLsizei drawcount, const GLint* basevertex) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::MultiDrawElements called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::MultiDrawElements called with null GL context");
MultiDrawIndexedCmd payload{};
payload.mode = mode;
payload.indexBufferView.indexType = type;
// TODO: allocate draw cmd buf elsewhere
static Vector<DrawIndexedCmdParam> params;
params.clear();
params.resize(drawcount);
for (GLsizei i = 0; i < drawcount; ++i) {
if (count[i] == 0) {
continue;
}
// TODO: this index view needs a redesign, now there's a lotta redundant uploads
payload.indexBufferView.indexByteOffset = 0;
payload.indexBufferView.indexByteSize =
std::max(reinterpret_cast<SizeT>(indices[i]) + count[i] * MG_Util::GetGLTypeSize(type),
payload.indexBufferView.indexByteSize);
auto& param = params[i];
param.indexCount = count[i];
param.instanceCount = 1;
param.firstIndex = reinterpret_cast<SizeT>(indices[i]) / MG_Util::GetGLTypeSize(type);
param.vertexOffset = basevertex[i];
param.firstInstance = 0;
}
payload.drawCount = drawcount;
payload.pParams = params.data();
pVulkanRenderer->MultiDrawElements(payload);
}
void BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1,
GLint dstY1, GLbitfield mask, GLenum filter) {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::BlitFramebuffer called with null VulkanRenderer");
MOBILEGL_ASSERT(MG_State::pGLContext, "DirectVulkan::BlitFramebuffer called with null GL context");
pVulkanRenderer->BlitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
}
void Present() {
MOBILEGL_ASSERT(pVulkanRenderer, "DirectVulkan::Present called with null VulkanRenderer");
pVulkanRenderer->Present();
}
} // namespace MobileGL::MG_Backend::DirectVulkan