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[Fix] (MG_Backend/DirectGLES): support Voxy rendering

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Implemented:

- Advertise Voxy-required DirectGLES extensions without raising the reported OpenGL version.

- Add DirectGLES multi draw indirect count emulation and preserve GL draw indirect baseInstance semantics on GLES.

- Add DirectGLES DSA framebuffer clear/blit paths used by Minecraft and Voxy presentation.

Fixed:

- Rewrite gl_BaseInstance in DirectGLES vertex shaders and provide a backend uniform for indirect draw emulation.

- Materialize framebuffer attachment textures during DirectGLES FBO sync so named framebuffer operations do not desync backend attachment state.

- Avoid redundant texture buffer rebinding and handle texture buffers without bound storage during backend sync.

Tests:

- Add MG_Test coverage for DirectGLES Voxy extension advertising, baseInstance shader rewriting, and DSA named framebuffer clear/blit backend wiring.
This commit is contained in:
swung0x48
2026-06-09 17:20:23 +08:00
parent dd52f0381a
commit 85bd0613ca
6 changed files with 418 additions and 13 deletions
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MobileGL/MG_Backend/DirectGLES/DirectGLES.h
+12
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@@ -8,6 +8,7 @@
#pragma once
#include <Includes.h>
#include <MG_State/GLState/FramebufferState/FramebufferObject.h>
#include <MG_State/GLState/TextureState/TextureState.h>
#include <MG_State/GLState/SamplerState/SamplerObject.h>
#include <MG_Util/BackendLoaders/OpenGL/Loader.h>
@@ -30,6 +31,8 @@ namespace MobileGL::MG_Backend::DirectGLES {
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);
void MultiDrawElementsIndirectCount(GLenum mode, GLenum type, const void* indirect, GLintptr drawcount,
GLsizei maxdrawcount, 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);
@@ -46,8 +49,17 @@ namespace MobileGL::MG_Backend::DirectGLES {
GLuint baseinstance);
void DrawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei instancecount);
void DrawArraysIndirect(GLenum mode, const void* indirect);
void ClearNamedFramebufferfv(const SharedPtr<MG_State::GLState::FramebufferObject>& framebuffer,
GLenum buffer, GLint drawbuffer, const GLfloat* value);
void ClearNamedFramebufferfi(const SharedPtr<MG_State::GLState::FramebufferObject>& framebuffer,
GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil);
void BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1,
GLint dstY1, GLbitfield mask, GLenum filter);
void BlitNamedFramebuffer(const SharedPtr<MG_State::GLState::FramebufferObject>& readFramebuffer,
const SharedPtr<MG_State::GLState::FramebufferObject>& drawFramebuffer,
GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter);
void CopyTexImage2D(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width,
GLsizei height, GLint border);
void CopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width,