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[Feat] (MG_Backend/DirectVulkan): Add optional device extension. Impl MultiDrawElements.

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This commit is contained in:
BZLZHH
2026-02-21 16:16:07 +08:00
parent 7f9953fdee
commit 07b7f7eba5
3 changed files with 414 additions and 33 deletions
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MobileGL/MG_Backend/DirectVulkan/DirectVulkan.cpp
+91 -2
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@@ -18,8 +18,7 @@ namespace MobileGL::MG_Backend::DirectVulkan {
void ClearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint* value) {}
void ClearBufferiv(GLenum buffer, GLint drawbuffer, const GLint* value) {}
void DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type, const GLvoid* indices, GLint basevertex) {}
void MultiDrawElements(GLenum mode, const GLsizei* count, GLenum type, const GLvoid* const* indices,
GLsizei drawcount) {}
void MultiDrawElementsBaseVertex(GLenum mode, const GLsizei* count, GLenum type, const GLvoid* const* indices,
GLsizei drawcount, const GLint* basevertex) {}
void MultiDrawElementsIndirect(GLenum mode, GLenum type, const void* indirect, GLsizei drawcount, GLsizei stride) {}
@@ -47,6 +46,96 @@ namespace MobileGL::MG_Backend::DirectVulkan {
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 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");
if (drawcount < 0) {
MGLOG_W("MultiDrawElements skipped: drawcount (%d) must be non-negative", drawcount);
return;
}
if (drawcount == 0) {
return;
}
if (!count || !indices) {
MGLOG_W("MultiDrawElements skipped: count/indices pointer is null");
return;
}
if (mode != GL_TRIANGLES) {
MGLOG_W("MultiDrawElements skipped: primitive mode %u is not supported yet", mode);
return;
}
SizeT indexSize = 0;
switch (type) {
case GL_UNSIGNED_SHORT:
indexSize = sizeof(Uint16);
break;
case GL_UNSIGNED_INT:
indexSize = sizeof(Uint32);
break;
default:
MGLOG_W("MultiDrawElements skipped: index type %u is not supported yet", type);
return;
}
const auto vao = MG_State::pGLContext->GetBoundVertexArray();
if (!vao) {
MGLOG_W("MultiDrawElements skipped: no bound VAO");
return;
}
const auto indexBuffer = vao->GetIndexBufferBindingSlot().GetBoundObject();
if (!indexBuffer) {
MGLOG_W("MultiDrawElements skipped: no bound ELEMENT_ARRAY_BUFFER");
return;
}
const auto indexData = indexBuffer->GetDataReadOnly();
if (!indexData || indexData->empty()) {
MGLOG_W("MultiDrawElements skipped: ELEMENT_ARRAY_BUFFER has no data");
return;
}
const auto currentProgram = MG_State::pGLContext->GetCurrentProgram();
Vector<DrawElementPayload> payloads;
payloads.reserve(static_cast<SizeT>(drawcount));
for (GLsizei i = 0; i < drawcount; ++i) {
if (count[i] < 0) {
MGLOG_W("MultiDrawElements skipped: count[%d] (%d) must be non-negative", i, count[i]);
return;
}
if (count[i] == 0) {
continue;
}
const auto byteOffset = reinterpret_cast<SizeT>(indices[i]);
const SizeT requiredBytes = static_cast<SizeT>(count[i]) * indexSize;
if (byteOffset + requiredBytes > indexBuffer->GetSize()) {
MGLOG_W("MultiDrawElements skipped: draw[%d] index range out of bounds (offset=%zu, size=%zu, "
"buffer=%zu)",
i, byteOffset, requiredBytes, indexBuffer->GetSize());
return;
}
DrawElementPayload payload{};
payload.drawArray.mode = mode;
payload.drawArray.first = 0;
payload.drawArray.count = count[i];
payload.drawArray.program = currentProgram ? currentProgram.get() : nullptr;
payload.drawArray.vertexArray = vao.get();
payload.indexType = type;
payload.indexByteOffset = byteOffset;
payloads.push_back(payload);
}
if (payloads.empty()) {
return;
}
pVulkanRenderer->MultiDrawElements(payloads);
}
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");