Add GL Stream Buffer from Duckstation

include/align.hpp

@@ -0,0 +1,99 @@
+// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
+
+#pragma once
+
+#include <cstdlib>
+
+#include "helpers.hpp"
+
+#ifdef _MSC_VER
+#include <malloc.h>
+#endif
+
+namespace Common {
+	template <typename T>
+	constexpr bool isAligned(T value, unsigned int alignment) {
+		return (value % static_cast<T>(alignment)) == 0;
+	}
+
+	template <typename T>
+	constexpr T alignUp(T value, unsigned int alignment) {
+		return (value + static_cast<T>(alignment - 1)) / static_cast<T>(alignment) * static_cast<T>(alignment);
+	}
+
+	template <typename T>
+	constexpr T alignDown(T value, unsigned int alignment) {
+		return value / static_cast<T>(alignment) * static_cast<T>(alignment);
+	}
+    
+	template <typename T>
+	constexpr bool isAlignedPow2(T value, unsigned int alignment) {
+		return (value & static_cast<T>(alignment - 1)) == 0;
+	}
+
+	template <typename T>
+	constexpr T alignUpPow2(T value, unsigned int alignment) {
+		return (value + static_cast<T>(alignment - 1)) & static_cast<T>(~static_cast<T>(alignment - 1));
+	}
+
+	template <typename T>
+	constexpr T alignDownPow2(T value, unsigned int alignment) {
+		return value & static_cast<T>(~static_cast<T>(alignment - 1));
+	}
+
+	template <typename T>
+	constexpr bool isPow2(T value) {
+		return (value & (value - 1)) == 0;
+	}
+
+	template <typename T>
+	constexpr T previousPow2(T value) {
+		if (value == static_cast<T>(0)) return 0;
+
+		value |= (value >> 1);
+		value |= (value >> 2);
+		value |= (value >> 4);
+		if constexpr (sizeof(T) >= 16) value |= (value >> 8);
+		if constexpr (sizeof(T) >= 32) value |= (value >> 16);
+		if constexpr (sizeof(T) >= 64) value |= (value >> 32);
+		return value - (value >> 1);
+	}
+    
+	template <typename T>
+	constexpr T nextPow2(T value) {
+		// https://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
+		if (value == static_cast<T>(0)) return 0;
+
+		value--;
+		value |= (value >> 1);
+		value |= (value >> 2);
+		value |= (value >> 4);
+		if constexpr (sizeof(T) >= 16) value |= (value >> 8);
+		if constexpr (sizeof(T) >= 32) value |= (value >> 16);
+		if constexpr (sizeof(T) >= 64) value |= (value >> 32);
+		value++;
+		return value;
+	}
+
+	ALWAYS_INLINE static void* alignedMalloc(size_t size, size_t alignment) {
+#ifdef _MSC_VER
+		return _aligned_malloc(size, alignment);
+#else
+		// Unaligned sizes are slow on macOS.
+#ifdef __APPLE__
+		if (isPow2(alignment)) size = (size + alignment - 1) & ~(alignment - 1);
+#endif
+		void* ret = nullptr;
+		return (posix_memalign(&ret, alignment, size) == 0) ? ret : nullptr;
+#endif
+	}
+
+	ALWAYS_INLINE static void alignedFree(void* ptr) {
+#ifdef _MSC_VER
+		_aligned_free(ptr);
+#else
+		free(ptr);
+#endif
+	}
+}  // namespace Common

include/renderer_gl/renderer_gl.hpp

@@ -3,6 +3,7 @@
 #include <array>
 #include <cstring>
 #include <functional>
+#include <memory>
 #include <optional>
 #include <span>
 #include <unordered_map>
@@ -10,11 +11,12 @@
 
 #include "PICA/float_types.hpp"
 #include "PICA/pica_frag_config.hpp"
-#include "PICA/pica_vert_config.hpp"
 #include "PICA/pica_hash.hpp"
+#include "PICA/pica_vert_config.hpp"
 #include "PICA/pica_vertex.hpp"
 #include "PICA/regs.hpp"
 #include "PICA/shader_gen.hpp"
+#include "gl/stream_buffer.h"
 #include "gl_state.hpp"
 #include "helpers.hpp"
 #include "logger.hpp"
@@ -83,6 +85,10 @@ class RendererGL final : public Renderer {
 	// UBO for uploading the PICA uniforms when using hw shaders
 	GLuint hwShaderUniformUBO;
 
+	using StreamBuffer = OpenGLStreamBuffer;
+	std::unique_ptr<StreamBuffer> hwVertexBuffer;
+	std::unique_ptr<StreamBuffer> hwIndexBuffer;
+
 	// Cached recompiled fragment shader
 	struct CachedProgram {
 		OpenGL::Program program;