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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_Test/SanityTest.cpp
+66
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@@ -14,6 +14,7 @@
#include <string>
#include <MG_Backend/DirectGLES/BackendObject_DirectGLES.h>
#include <MG_Backend/DirectGLES/Managers.h>
#include <MG_Backend/DirectVulkan/BackendObject_DirectVulkan.h>
#include <MG_Backend/BackendObjects.h>
#include <MG_Impl/GLImpl/Getter/GL_Getter.h>
@@ -90,6 +91,71 @@ TEST(DirectGLESSanity, AdvertisesDepthTextureForGlmarkShadowScenes) {
EXPECT_NE(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_ARB_depth_texture), extensions.end());
}
TEST(DirectGLESSanity, AdvertisesVoxyRequiredRenderingExtensionsWithoutRaisingGLVersion) {
MobileGL::MG_Backend::DirectGLES::BackendObject_DirectGLES backend;
const auto& rendererInfo = backend.GetRendererInfo().RendererGLInfo;
const auto& extensions = rendererInfo.Extensions;
EXPECT_EQ(rendererInfo.TargetGLVersion.Major, 3);
EXPECT_EQ(rendererInfo.TargetGLVersion.Minor, 3);
EXPECT_EQ(rendererInfo.TargetGLVersion.Patch, 0);
EXPECT_NE(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_ARB_compute_shader),
extensions.end());
EXPECT_NE(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_ARB_shader_storage_buffer_object),
extensions.end());
EXPECT_NE(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_ARB_texture_storage),
extensions.end());
EXPECT_NE(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_ARB_direct_state_access),
extensions.end());
EXPECT_NE(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_ARB_multi_draw_indirect),
extensions.end());
EXPECT_NE(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_ARB_indirect_parameters),
extensions.end());
EXPECT_NE(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_ARB_shader_draw_parameters),
extensions.end());
EXPECT_EQ(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_ARB_gpu_shader_int64),
extensions.end());
EXPECT_EQ(std::find(extensions.begin(), extensions.end(), MobileGL::E_GL_KHR_shader_subgroup),
extensions.end());
}
TEST(DirectGLESSanity, ProvidesNamedFramebufferBlitForDirectStateAccess) {
MobileGL::MG_Backend::DirectGLES::BackendObject_DirectGLES backend;
const auto& funcs = backend.GetBackendFunctions().GL;
EXPECT_NE(funcs.ClearNamedFramebufferfv, nullptr);
EXPECT_NE(funcs.ClearNamedFramebufferfi, nullptr);
EXPECT_NE(funcs.BlitFramebuffer, nullptr);
EXPECT_NE(funcs.BlitNamedFramebuffer, nullptr);
}
TEST(DirectGLESSanity, RewritesBaseInstanceBuiltinForEsslVertexShaders) {
const MobileGL::String source = R"(#version 320 es
void main() {
uint drawId = gl_BaseInstance;
uint untouched = my_gl_BaseInstance_value;
}
)";
const auto rewritten = MobileGL::MG_Backend::DirectGLES::EmulateBaseInstanceInVertexShader(
source, GL_VERTEX_SHADER);
EXPECT_NE(rewritten.find("uniform highp int mg_BaseInstance;"), MobileGL::String::npos);
EXPECT_NE(rewritten.find("uint drawId = mg_BaseInstance;"), MobileGL::String::npos);
EXPECT_NE(rewritten.find("my_gl_BaseInstance_value"), MobileGL::String::npos);
EXPECT_EQ(rewritten.find("uint drawId = gl_BaseInstance;"), MobileGL::String::npos);
}
TEST(DirectGLESSanity, LeavesBaseInstanceBuiltinAloneOutsideVertexShaders) {
const MobileGL::String source = "#version 320 es\nuint value = gl_BaseInstance;\n";
const auto rewritten = MobileGL::MG_Backend::DirectGLES::EmulateBaseInstanceInVertexShader(
source, GL_FRAGMENT_SHADER);
EXPECT_EQ(rewritten, source);
}
TEST(DirectVulkanSanity, AdvertisesTextureStorageForDirectStateAccess) {
MobileGL::MG_Backend::DirectVulkan::BackendObject_DirectVulkan backend;
const auto& extensions = backend.GetRendererInfo().RendererGLInfo.Extensions;