From 12f295c4a5cf6aa3667d87d2a637f4499cab41db Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henrik=20Rydg=C3=A5rd?= <hrydgard@gmail.com>
Date: Thu, 3 Jan 2019 12:43:00 +0100
Subject: [PATCH] GLES: Detect Vivante GPU, disable vertex range culling

Should work-around #11703
---
 GPU/GLES/GPU_GLES.cpp               | 5 ++++-
 ext/native/gfx_es2/gpu_features.cpp | 2 ++
 ext/native/gfx_es2/gpu_features.h   | 2 ++
 ext/native/thin3d/thin3d.h          | 2 ++
 ext/native/thin3d/thin3d_gl.cpp     | 4 ++++
 5 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/GPU/GLES/GPU_GLES.cpp b/GPU/GLES/GPU_GLES.cpp
index 3a37ba24d8be..bb54322f7f7a 100644
--- a/GPU/GLES/GPU_GLES.cpp
+++ b/GPU/GLES/GPU_GLES.cpp
@@ -147,7 +147,10 @@ void GPU_GLES::CheckGPUFeatures() {
 	u32 features = 0;
 
 	features |= GPU_SUPPORTS_16BIT_FORMATS;
-	features |= GPU_SUPPORTS_VS_RANGE_CULLING;
+
+	if (!draw_->GetBugs().Has(Draw::Bugs::BROKEN_NAN_IN_CONDITIONAL)) {
+		features |= GPU_SUPPORTS_VS_RANGE_CULLING;
+	}
 
 	if (gl_extensions.ARB_blend_func_extended || gl_extensions.EXT_blend_func_extended) {
 		if (!g_Config.bVendorBugChecksEnabled || !draw_->GetBugs().Has(Draw::Bugs::DUAL_SOURCE_BLENDING_BROKEN)) {
diff --git a/ext/native/gfx_es2/gpu_features.cpp b/ext/native/gfx_es2/gpu_features.cpp
index 3c8fb4666314..3d81f592870a 100644
--- a/ext/native/gfx_es2/gpu_features.cpp
+++ b/ext/native/gfx_es2/gpu_features.cpp
@@ -159,6 +159,8 @@ void CheckGLExtensions() {
 		} else if (vendor == "Broadcom") {
 			gl_extensions.gpuVendor = GPU_VENDOR_BROADCOM;
 			// Just for reference: Galaxy Y has renderer == "VideoCore IV HW"
+		} else if (vendor == "Vivante Corporation") {
+			gl_extensions.gpuVendor = GPU_VENDOR_VIVANTE;
 		} else {
 			gl_extensions.gpuVendor = GPU_VENDOR_UNKNOWN;
 		}
diff --git a/ext/native/gfx_es2/gpu_features.h b/ext/native/gfx_es2/gpu_features.h
index 80cbc906bd06..94ba18912ae8 100644
--- a/ext/native/gfx_es2/gpu_features.h
+++ b/ext/native/gfx_es2/gpu_features.h
@@ -15,9 +15,11 @@ enum {
 	GPU_VENDOR_IMGTEC = 5,
 	GPU_VENDOR_QUALCOMM = 6,
 	GPU_VENDOR_BROADCOM = 7,
+	GPU_VENDOR_VIVANTE = 8,
 	GPU_VENDOR_UNKNOWN = 0,
 };
 
+// TODO: Move to Draw::Bugs
 enum {
 	BUG_FBO_UNUSABLE = 1,
 	BUG_PVR_SHADER_PRECISION_BAD = 2,
diff --git a/ext/native/thin3d/thin3d.h b/ext/native/thin3d/thin3d.h
index 1d0e28a98389..20b96d5f0b7f 100644
--- a/ext/native/thin3d/thin3d.h
+++ b/ext/native/thin3d/thin3d.h
@@ -234,6 +234,7 @@ enum class GPUVendor {
 	VENDOR_QUALCOMM,
 	VENDOR_IMGTEC,  // PowerVR
 	VENDOR_BROADCOM,  // Raspberry
+	VENDOR_VIVANTE,
 };
 
 enum class NativeObject {
@@ -329,6 +330,7 @@ class Bugs {
 		DUAL_SOURCE_BLENDING_BROKEN = 1,
 		ANY_MAP_BUFFER_RANGE_SLOW = 2,
 		PVR_GENMIPMAP_HEIGHT_GREATER = 3,
+		BROKEN_NAN_IN_CONDITIONAL = 4,
 	};
 
 protected:
diff --git a/ext/native/thin3d/thin3d_gl.cpp b/ext/native/thin3d/thin3d_gl.cpp
index 1d812ce4966d..872c169aff78 100644
--- a/ext/native/thin3d/thin3d_gl.cpp
+++ b/ext/native/thin3d/thin3d_gl.cpp
@@ -453,6 +453,7 @@ class OpenGLContext : public DrawContext {
 				case GPUVendor::VENDOR_QUALCOMM: return "VENDOR_ADRENO";
 				case GPUVendor::VENDOR_ARM: return "VENDOR_ARM";
 				case GPUVendor::VENDOR_BROADCOM: return "VENDOR_BROADCOM";
+				case GPUVendor::VENDOR_VIVANTE: return "VENDOR_VIVANTE";
 				case GPUVendor::VENDOR_UNKNOWN:
 				default:
 					return "VENDOR_UNKNOWN";
@@ -545,6 +546,7 @@ OpenGLContext::OpenGLContext() {
 	case GPU_VENDOR_BROADCOM: caps_.vendor = GPUVendor::VENDOR_BROADCOM; break;
 	case GPU_VENDOR_INTEL: caps_.vendor = GPUVendor::VENDOR_INTEL; break;
 	case GPU_VENDOR_IMGTEC: caps_.vendor = GPUVendor::VENDOR_IMGTEC; break;
+	case GPU_VENDOR_VIVANTE: caps_.vendor = GPUVendor::VENDOR_VIVANTE; break;
 	case GPU_VENDOR_UNKNOWN:
 	default:
 		caps_.vendor = GPUVendor::VENDOR_UNKNOWN;
@@ -567,6 +569,8 @@ OpenGLContext::OpenGLContext() {
 				bugs_.Infest(Bugs::DUAL_SOURCE_BLENDING_BROKEN);
 			}
 		}
+	} else if (caps_.vendor == GPUVendor::VENDOR_VIVANTE) {
+		bugs_.Infest(Bugs::BROKEN_NAN_IN_CONDITIONAL);
 	}
 
 	// TODO: Make this check more lenient. Disabled for all right now