Move all low level texture operations to DSA helpers in glTexture

10 files changed, 264 insertions, 80 deletions

diff --git a/gfx/gl/billboardPainter.cpp b/gfx/gl/billboardPainter.cpp
index 3b03c87..91d9168 100644
--- a/gfx/gl/billboardPainter.cpp
+++ b/gfx/gl/billboardPainter.cpp
@@ -38,27 +38,26 @@ BillboardPainter::getAngle() const
 }
 
 void
-BillboardPainter::configureBillBoardTextures(glTextures<3> & textures, GLsizei width, GLsizei height)
+BillboardPainter::configureBillBoardTextures(glTextures<GL_TEXTURE_2D_ARRAY, 3> & textures, ImageDimensions size)
 {
 	glDebugScope _ {0};
 	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 
-	const auto configuregdata = [width, height](Impl::glTexture & texture, const GLint iformat, const GLenum format) {
-		texture.bind(GL_TEXTURE_2D_ARRAY);
+	const auto configuregdata = [size](Impl::glTexture<GL_TEXTURE_2D_ARRAY> & texture, const GLenum iformat) {
+		texture.storage(1, iformat, size || VIEW_ANGLES<GLsizei>);
 		texture.parameter(GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 		texture.parameter(GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 		texture.parameter(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 		texture.parameter(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-		glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, iformat, width, height, VIEW_ANGLES<GLint>, 0, format, GL_BYTE, nullptr);
 	};
-	configuregdata(textures[0], GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT);
-	configuregdata(textures[1], GL_RGB8_SNORM, GL_RGB);
-	configuregdata(textures[2], GL_RGB5_A1, GL_RGBA);
+	configuregdata(textures[0], GL_DEPTH_COMPONENT16);
+	configuregdata(textures[1], GL_RGB8_SNORM);
+	configuregdata(textures[2], GL_RGB5_A1);
 }
 
 void
-BillboardPainter::renderBillBoard(
-		const glTextures<3> & billboard, const MeshBase & mesh, const Texture::AnyPtr texture) const
+BillboardPainter::renderBillBoard(const glTextures<GL_TEXTURE_2D_ARRAY, 3> & billboard, const MeshBase & mesh,
+		const Texture::AnyPtr texture) const
 {
 	glDebugScope _ {fbo};
 	glEnable(GL_BLEND);
@@ -75,7 +74,7 @@ BillboardPainter::renderBillBoard(
 		throw std::runtime_error("Billboard framebuffer not complete!");
 	}
 	if (texture) {
-		texture->bind();
+		texture->bind(0);
 	}
 	glUseProgram(program);
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
diff --git a/gfx/gl/billboardPainter.h b/gfx/gl/billboardPainter.h
index 0f6334a..9f3a39a 100644
--- a/gfx/gl/billboardPainter.h
+++ b/gfx/gl/billboardPainter.h
@@ -13,10 +13,10 @@ public:
 
 	BillboardPainter();
 
-	static void configureBillBoardTextures(glTextures<3> &, GLsizei width, GLsizei height);
+	static void configureBillBoardTextures(glTextures<GL_TEXTURE_2D_ARRAY, 3> &, ImageDimensions);
 	void setView(Angle angle, const glm::mat4 &);
 	[[nodiscard]] Angle getAngle() const;
-	void renderBillBoard(const glTextures<3> &, const MeshBase &, Texture::AnyPtr texture) const;
+	void renderBillBoard(const glTextures<GL_TEXTURE_2D_ARRAY, 3> &, const MeshBase &, Texture::AnyPtr texture) const;
 
 private:
 	glFrameBuffer fbo;
diff --git a/gfx/gl/glTexture.cpp b/gfx/gl/glTexture.cpp
index 8dcf16f..e334d5e 100644
--- a/gfx/gl/glTexture.cpp
+++ b/gfx/gl/glTexture.cpp
@@ -1,18 +1,161 @@
 #include "glTexture.h"
+#include "filesystem.h"
+#include "gfx/models/tga.h"
+#include <fcntl.h>
+#include <ranges>
+#include <sys/mman.h>
 
-TextureDimensions
-Impl::glTexture::getSize() const
+void
+Impl::glTextureBase::bind(const GLuint unit) const
+{
+	glBindTextureUnit(unit, name);
+}
+
+void
+Impl::glTextureBase::generateMipmap()
+{
+	glGenerateTextureMipmap(name);
+}
+
+template<glm::length_t Dims>
+	requires(Dims >= 1 && Dims <= 3)
+glm::vec<Dims, GLsizei>
+Impl::glTextureDims<Dims>::getSize() const
 {
-	TextureDimensions size {};
-	glGetTextureLevelParameteriv(name, 0, GL_TEXTURE_WIDTH, &size.x);
-	glGetTextureLevelParameteriv(name, 0, GL_TEXTURE_HEIGHT, &size.y);
-	glGetTextureLevelParameteriv(name, 0, GL_TEXTURE_DEPTH, &size.z);
+	static constexpr std::array<GLenum, 3> PARAMS {GL_TEXTURE_WIDTH, GL_TEXTURE_HEIGHT, GL_TEXTURE_DEPTH};
+	glm::vec<Dims, GLsizei> size {};
+	for (auto [dim, param] : std::views::enumerate(PARAMS) | std::views::take(Dims)) {
+		glGetTextureLevelParameteriv(name, 0, param, &size[static_cast<glm::length_t>(dim)]);
+	}
 	return size;
 }
 
+template<>
+void
+Impl::glTextureDims<1>::storage(const GLsizei levels, const GLenum internalformat, glm::vec<1, GLsizei> dims)
+{
+	glTextureStorage1D(name, levels, internalformat, dims.x);
+}
+
+template<>
+void
+Impl::glTextureDims<2>::storage(const GLsizei levels, const GLenum internalformat, glm::vec<2, GLsizei> dims)
+{
+	glTextureStorage2D(name, levels, internalformat, dims.x, dims.y);
+}
+
+template<>
+void
+Impl::glTextureDims<3>::storage(const GLsizei levels, const GLenum internalformat, glm::vec<3, GLsizei> dims)
+{
+	glTextureStorage3D(name, levels, internalformat, dims.x, dims.y, dims.z);
+}
+
+template<>
+void
+Impl::glTextureDims<1>::subImage(
+		glm::vec<1, GLint> offset, glm::vec<1, GLint> size, const GLenum format, const GLenum type, const void * pixels)
+{
+	glTextureSubImage1D(name, 0, offset.x, size.x, format, type, pixels);
+}
+
+template<>
+void
+Impl::glTextureDims<2>::subImage(
+		glm::vec<2, GLint> offset, glm::vec<2, GLint> size, const GLenum format, const GLenum type, const void * pixels)
+{
+	glTextureSubImage2D(name, 0, offset.x, offset.y, size.x, size.y, format, type, pixels);
+}
+
+template<>
 void
-Impl::glTexture::bind(GLenum type, GLenum unit) const
+Impl::glTextureDims<3>::subImage(
+		glm::vec<3, GLint> offset, glm::vec<3, GLint> size, const GLenum format, const GLenum type, const void * pixels)
 {
-	glActiveTexture(unit);
-	glBindTexture(type, name);
+	glTextureSubImage3D(name, 0, offset.x, offset.y, offset.z, size.x, size.y, size.z, format, type, pixels);
 }
+
+template<glm::length_t Dims>
+	requires(Dims >= 1 && Dims <= 3)
+void
+Impl::glTextureDims<Dims>::image(
+		glm::vec<Dims, GLint> size, const GLenum format, const GLenum type, const void * pixels)
+{
+	subImage({}, size, format, type, pixels);
+}
+
+template<glm::length_t Dims>
+	requires(Dims >= 1 && Dims <= 3)
+void
+Impl::glTextureDims<Dims>::image(const GLenum format, const GLenum type, const void * pixels)
+{
+	image(getSize(), format, type, pixels);
+}
+
+namespace {
+	template<glm::length_t Dims>
+		requires(Dims >= 1 && Dims <= 3)
+	void
+	save(const Impl::glTextureDims<Dims> & texture, const GLenum format, const GLenum type, uint8_t channels,
+			const char * path, uint8_t tgaFormat)
+	{
+		const auto size = texture.getSize();
+		const auto area = [size]() {
+			size_t area = 1;
+			for (auto dim = 0; dim < Dims; ++dim) {
+				area *= static_cast<size_t>(size[dim]);
+			}
+			return area;
+		}();
+		size_t dataSize = area * channels;
+		const size_t fileSize = dataSize + sizeof(TGAHead);
+
+		filesystem::fh out {path, O_RDWR | O_CREAT, 0660};
+		out.truncate(fileSize);
+		auto tga = out.mmap(fileSize, 0, PROT_WRITE, MAP_SHARED);
+		*tga.get<TGAHead>() = {
+				.format = tgaFormat,
+				.size = {size.x, 1 * (area / static_cast<size_t>(size.x))},
+				.pixelDepth = static_cast<uint8_t>(8 * channels),
+		};
+		glPixelStorei(GL_PACK_ALIGNMENT, 1);
+		glGetTextureImage(texture, 0, format, type, static_cast<GLsizei>(dataSize), tga.get<TGAHead>() + 1);
+		tga.msync(MS_ASYNC);
+	}
+}
+
+template<glm::length_t Dims>
+	requires(Dims >= 1 && Dims <= 3)
+void
+Impl::glTextureDims<Dims>::saveColour(const char * path) const
+{
+	save(*this, GL_BGR, GL_UNSIGNED_BYTE, 3, path, 2);
+}
+
+template<glm::length_t Dims>
+	requires(Dims >= 1 && Dims <= 3)
+void
+Impl::glTextureDims<Dims>::savePosition(const char * path) const
+{
+	save(*this, GL_BGR_INTEGER, GL_UNSIGNED_BYTE, 3, path, 2);
+}
+
+template<glm::length_t Dims>
+	requires(Dims >= 1 && Dims <= 3)
+void
+Impl::glTextureDims<Dims>::saveDepth(const char * path) const
+{
+	save(*this, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 1, path, 3);
+}
+
+template<glm::length_t Dims>
+	requires(Dims >= 1 && Dims <= 3)
+void
+Impl::glTextureDims<Dims>::saveNormal(const char * path) const
+{
+	save(*this, GL_BGR, GL_BYTE, 3, path, 2);
+}
+
+template struct Impl::glTextureDims<1>;
+template struct Impl::glTextureDims<2>;
+template struct Impl::glTextureDims<3>;
diff --git a/gfx/gl/glTexture.h b/gfx/gl/glTexture.h
index 5e5c838..3472c4a 100644
--- a/gfx/gl/glTexture.h
+++ b/gfx/gl/glTexture.h
@@ -1,14 +1,34 @@
 #pragma once
 
-#include "config/types.h"
 #include "glArrays.h"
 #include "gl_traits.h"
 
 namespace Impl {
-	// NOLINTNEXTLINE(readability-identifier-naming)
-	struct glTexture : Detail::glNamed {
-		[[nodiscard]] TextureDimensions getSize() const;
-		void bind(GLenum type = GL_TEXTURE_2D, GLenum unit = GL_TEXTURE0) const;
+	template<GLenum> struct TextureTargetTraits;
+
+	template<GLenum Target> struct TextureTargetTraitsCommon {
+		static void
+		create(GLsizei count, GLuint * textures)
+		{
+			glCreateTextures(Target, count, textures);
+		}
+	};
+
+	template<> struct TextureTargetTraits<GL_TEXTURE_2D> : TextureTargetTraitsCommon<GL_TEXTURE_2D> {
+		constexpr static glm::length_t dims = 2;
+	};
+
+	template<> struct TextureTargetTraits<GL_TEXTURE_2D_ARRAY> : TextureTargetTraitsCommon<GL_TEXTURE_2D_ARRAY> {
+		constexpr static glm::length_t dims = 3;
+	};
+
+	template<> struct TextureTargetTraits<GL_TEXTURE_RECTANGLE> : TextureTargetTraitsCommon<GL_TEXTURE_RECTANGLE> {
+		constexpr static glm::length_t dims = 2;
+	};
+
+	struct glTextureBase : Detail::glNamed {
+		void bind(GLuint unit) const;
+		void generateMipmap();
 
 		template<has_glTextureParameter T>
 		void
@@ -24,9 +44,29 @@ namespace Impl {
 			(*gl_traits<T>::glTextureParametervFunc)(name, pname, glm::value_ptr(param));
 		}
 	};
+
+	template<glm::length_t Dims>
+		requires(Dims >= 1 && Dims <= 3)
+	struct glTextureDims : glTextureBase {
+		[[nodiscard]] glm::vec<Dims, GLsizei> getSize() const;
+		void storage(GLsizei levels, GLenum internalformat, glm::vec<Dims, GLsizei> dims);
+		void image(GLenum format, GLenum type, const void * pixels);
+		void image(glm::vec<Dims, GLint> size, GLenum format, GLenum type, const void * pixels);
+		void subImage(glm::vec<Dims, GLint> offset, glm::vec<Dims, GLint> size, GLenum format, GLenum type,
+				const void * pixels);
+
+		void saveColour(const char * path) const;
+		void saveDepth(const char * path) const;
+		void saveNormal(const char * path) const;
+		void savePosition(const char * path) const;
+	};
+
+	template<GLenum Target> struct glTexture : glTextureDims<TextureTargetTraits<Target>::dims> { };
 }
 
-// NOLINTBEGIN(readability-identifier-naming)
-template<size_t N> using glTextures = glManagedArray<Impl::glTexture, N, &glGenTextures, &glDeleteTextures>;
-using glTexture = glManagedSingle<Impl::glTexture, &glGenTextures, &glDeleteTextures>;
-// NOLINTEND(readability-identifier-naming)
+template<GLenum Target, size_t N>
+using glTextures
+		= glManagedArray<Impl::glTexture<Target>, N, &Impl::TextureTargetTraits<Target>::create, &glDeleteTextures>;
+template<GLenum Target>
+using glTexture
+		= glManagedSingle<Impl::glTexture<Target>, &Impl::TextureTargetTraits<Target>::create, &glDeleteTextures>;
diff --git a/gfx/gl/sceneRenderer.cpp b/gfx/gl/sceneRenderer.cpp
index d4812df..343321f 100644
--- a/gfx/gl/sceneRenderer.cpp
+++ b/gfx/gl/sceneRenderer.cpp
@@ -23,28 +23,21 @@ SceneRenderer::SceneRenderer(ScreenAbsCoord s, GLuint o, glDebugScope) :
 	shader.setViewPort({0, 0, size.x, size.y});
 	displayVAO.configure().addAttribs<glm::i8vec4>(0, displayVBO, displayVAOdata);
 
-	const auto configuregdata = [this](glTexture & data, const std::initializer_list<GLint> iformats,
-										const GLenum format, const GLenum attachment) {
-		data.bind();
+	const auto configuregdata = [this](glTexture<GL_TEXTURE_2D> & data, const GLenum iformat, const GLenum attachment) {
+		data.storage(1, iformat, size);
 		data.parameter(GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 		data.parameter(GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-		for (const auto iformat : iformats) {
-			glTexImage2D(GL_TEXTURE_2D, 0, iformat, size.x, size.y, 0, format, GL_BYTE, nullptr);
-
-			glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_2D, data, 0);
-			if (glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE) {
-				return iformat;
-			}
-		}
-		throw std::runtime_error("Framebuffer could not be completed!");
+		glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_2D, data, 0);
 	};
 
 	glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
-	configuregdata(gPosition, {GL_RGB32I}, GL_RGB_INTEGER, GL_COLOR_ATTACHMENT0);
-	normaliFormat = configuregdata(gNormal, {GL_RGB8_SNORM, GL_RGB16F}, GL_RGB, GL_COLOR_ATTACHMENT1);
-	configuregdata(gAlbedoSpec, {GL_RGB8}, GL_RGB, GL_COLOR_ATTACHMENT2);
-	constexpr std::array<unsigned int, 3> attachments {
-			GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2};
+	configuregdata(gPosition, GL_RGB32I, GL_COLOR_ATTACHMENT0);
+	configuregdata(gNormal, GL_RGB8_SNORM, GL_COLOR_ATTACHMENT1);
+	configuregdata(gAlbedoSpec, GL_RGB8, GL_COLOR_ATTACHMENT2);
+	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+		throw std::runtime_error("Framebuffer could not be completed! (setup gBuffer)");
+	}
+	constexpr std::array<GLenum, 3> attachments {GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1, GL_COLOR_ATTACHMENT2};
 	glDrawBuffers(attachments.size(), attachments.data());
 
 	glBindRenderbuffer(GL_RENDERBUFFER, depth);
@@ -52,7 +45,10 @@ SceneRenderer::SceneRenderer(ScreenAbsCoord s, GLuint o, glDebugScope) :
 	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth);
 
 	glBindFramebuffer(GL_FRAMEBUFFER, gBufferIll);
-	configuregdata(gIllumination, {GL_RGB8}, GL_RGB, GL_COLOR_ATTACHMENT0);
+	configuregdata(gIllumination, GL_RGB8, GL_COLOR_ATTACHMENT0);
+	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+		throw std::runtime_error("Framebuffer could not be completed! (setup gBufferIll)");
+	}
 	glDrawBuffer(GL_COLOR_ATTACHMENT0);
 
 	glBindFramebuffer(GL_FRAMEBUFFER, output);
@@ -64,16 +60,27 @@ SceneRenderer::resize(ScreenAbsCoord newSize)
 	glDebugScope _ {output};
 	size = newSize;
 	camera.setAspect(ratio(size));
-	const auto configuregdata = [this](const auto & data, const GLint iformat, const GLenum format) {
-		data.bind();
-		glTexImage2D(GL_TEXTURE_2D, 0, iformat, size.x, size.y, 0, format, GL_BYTE, nullptr);
+	const auto configuregdata = [this](glTexture<GL_TEXTURE_2D> & data, const GLenum iformat, const GLenum attachment) {
+		data = {};
+		data.storage(1, iformat, size);
+		data.parameter(GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		data.parameter(GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+		glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_2D, data, 0);
 	};
-	configuregdata(gPosition, GL_RGB32I, GL_RGB_INTEGER);
-	configuregdata(gNormal, normaliFormat, GL_RGB);
-	configuregdata(gAlbedoSpec, GL_RGB8, GL_RGB);
-	configuregdata(gIllumination, GL_RGB8, GL_RGB);
 	glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
+	configuregdata(gPosition, GL_RGB32I, GL_COLOR_ATTACHMENT0);
+	configuregdata(gNormal, GL_RGB8_SNORM, GL_COLOR_ATTACHMENT1);
+	configuregdata(gAlbedoSpec, GL_RGB8, GL_COLOR_ATTACHMENT2);
 	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, size.x, size.y);
+	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+		throw std::runtime_error("Framebuffer could not be completed! (resize gBuffer)");
+	}
+	glBindFramebuffer(GL_FRAMEBUFFER, gBufferIll);
+	configuregdata(gIllumination, GL_RGB8, GL_COLOR_ATTACHMENT0);
+	if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+		throw std::runtime_error("Framebuffer could not be completed! (resize gBufferIll)");
+	}
+	glDrawBuffer(GL_COLOR_ATTACHMENT0);
 	shader.setViewPort({0, 0, size.x, size.y});
 }
 
@@ -123,9 +130,9 @@ SceneRenderer::render(const SceneProvider & scene) const
 		// * per light - reads normal and position, writes illumination
 		glBindFramebuffer(GL_FRAMEBUFFER, gBufferIll);
 		glBlendFunc(GL_ONE, GL_ONE);
-		gPosition.bind(GL_TEXTURE_2D, GL_TEXTURE0);
-		gNormal.bind(GL_TEXTURE_2D, GL_TEXTURE1);
-		shadowMapper.bind(GL_TEXTURE2);
+		gPosition.bind(0);
+		gNormal.bind(1);
+		shadowMapper.bind(2);
 		glDisable(GL_DEPTH_TEST);
 		scene.lights(shader);
 	}
@@ -137,8 +144,8 @@ SceneRenderer::render(const SceneProvider & scene) const
 		glCullFace(GL_BACK);
 		glDisable(GL_BLEND);
 		glDisable(GL_DEPTH_TEST);
-		gAlbedoSpec.bind(GL_TEXTURE_2D, GL_TEXTURE2);
-		gIllumination.bind(GL_TEXTURE_2D, GL_TEXTURE3);
+		gAlbedoSpec.bind(2);
+		gIllumination.bind(3);
 		lighting.use();
 		renderQuad();
 	}
@@ -162,9 +169,9 @@ SceneRenderer::setDirectionalLight(
 		const auto lvp = shadowMapper.update(scene, direction, camera);
 		glBindFramebuffer(GL_FRAMEBUFFER, gBufferIll);
 		glBlendFunc(GL_ONE, GL_ONE);
-		gPosition.bind(GL_TEXTURE_2D, GL_TEXTURE0);
-		gNormal.bind(GL_TEXTURE_2D, GL_TEXTURE1);
-		shadowMapper.bind(GL_TEXTURE2);
+		gPosition.bind(0);
+		gNormal.bind(1);
+		shadowMapper.bind(2);
 		glViewport(0, 0, size.x, size.y);
 		dirLight.use();
 		dirLight.setDirectionalLight(colour, direction.vector(), camera.getPosition(), lvp);
diff --git a/gfx/gl/sceneRenderer.h b/gfx/gl/sceneRenderer.h
index a7f7770..e9cafb4 100644
--- a/gfx/gl/sceneRenderer.h
+++ b/gfx/gl/sceneRenderer.h
@@ -31,8 +31,7 @@ protected:
 	ScreenAbsCoord size;
 	GLuint output;
 	glFrameBuffer gBuffer, gBufferIll;
-	GLint normaliFormat;
-	glTexture gPosition, gNormal, gAlbedoSpec, gIllumination;
+	glTexture<GL_TEXTURE_2D> gPosition, gNormal, gAlbedoSpec, gIllumination;
 	glRenderBuffer depth;
 
 	class DeferredLightProgram : public Program {
diff --git a/gfx/gl/shadowMapper.cpp b/gfx/gl/shadowMapper.cpp
index fb57668..28ab360 100644
--- a/gfx/gl/shadowMapper.cpp
+++ b/gfx/gl/shadowMapper.cpp
@@ -24,6 +24,7 @@
 #include <glm/gtc/type_ptr.hpp>
 #include <glm/gtx/transform.hpp>
 #include <glm/matrix.hpp>
+#include <maths.h>
 
 ShadowMapper::ShadowMapper(const TextureAbsCoord & s) :
 	landmess {shadowLandmass_vert}, dynamicPointInst {shadowDynamicPointInst_vert},
@@ -32,9 +33,7 @@ ShadowMapper::ShadowMapper(const TextureAbsCoord & s) :
 	size {s}, frustum {{}, {}, {}}
 {
 	glDebugScope _ {depthMap};
-	depthMap.bind(GL_TEXTURE_2D_ARRAY);
-	glTexImage3D(
-			GL_TEXTURE_2D_ARRAY, 0, GL_DEPTH_COMPONENT, size.x, size.y, 4, 0, GL_DEPTH_COMPONENT, GL_FLOAT, nullptr);
+	depthMap.storage(1, GL_DEPTH_COMPONENT16, size || static_cast<GLsizei>(SHADOW_BANDS));
 	depthMap.parameter(GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 	depthMap.parameter(GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 	depthMap.parameter(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
diff --git a/gfx/gl/shadowMapper.h b/gfx/gl/shadowMapper.h
index 0d9763a..adae847 100644
--- a/gfx/gl/shadowMapper.h
+++ b/gfx/gl/shadowMapper.h
@@ -71,14 +71,14 @@ public:
 	void
 	bind(GLenum unit) const
 	{
-		depthMap.bind(GL_TEXTURE_2D_ARRAY, unit);
+		depthMap.bind(unit);
 	}
 
 private:
 	using BandViewExtents = std::array<std::array<RelativePosition3D, 4>, SHADOW_BANDS + 1>;
 	[[nodiscard]] static size_t getBandViewExtents(BandViewExtents &, const Camera &, const glm::mat4 & lightView);
 	glFrameBuffer depthMapFBO;
-	glTexture depthMap;
+	glTexture<GL_TEXTURE_2D_ARRAY> depthMap;
 	TextureAbsCoord size;
 
 	BandViewExtents bandViewExtents;
diff --git a/gfx/gl/shadowStenciller.cpp b/gfx/gl/shadowStenciller.cpp
index a5f9d68..cafae02 100644
--- a/gfx/gl/shadowStenciller.cpp
+++ b/gfx/gl/shadowStenciller.cpp
@@ -37,22 +37,19 @@ ShadowStenciller::getLightDirection() const
 }
 
 void
-ShadowStenciller::configureStencilTexture(glTexture & stencil, GLsizei width, GLsizei height)
+ShadowStenciller::configureStencilTexture(glTexture<GL_TEXTURE_2D_ARRAY> & stencil, ImageDimensions size)
 {
-	stencil.bind(GL_TEXTURE_2D_ARRAY);
 	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-
+	stencil.storage(1, GL_DEPTH_COMPONENT16, size || STENCIL_ANGLES<GLsizei>);
 	stencil.parameter(GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 	stencil.parameter(GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 	stencil.parameter(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 	stencil.parameter(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
-	glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_DEPTH_COMPONENT, width, height, STENCIL_ANGLES<GLint>, 0,
-			GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, nullptr);
 }
 
 void
-ShadowStenciller::renderStencil(const glTexture & stencil, const MeshBase & mesh, const Texture::AnyPtr texture) const
+ShadowStenciller::renderStencil(
+		const glTexture<GL_TEXTURE_2D_ARRAY> & stencil, const MeshBase & mesh, const Texture::AnyPtr texture) const
 {
 	glDebugScope _ {fbo};
 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
@@ -61,7 +58,7 @@ ShadowStenciller::renderStencil(const glTexture & stencil, const MeshBase & mesh
 		throw std::runtime_error("Stencil framebuffer not complete!");
 	}
 	if (texture) {
-		texture->bind();
+		texture->bind(0);
 	}
 	glUseProgram(shadowCaster);
 	glClear(GL_DEPTH_BUFFER_BIT);
diff --git a/gfx/gl/shadowStenciller.h b/gfx/gl/shadowStenciller.h
index 028bfa1..70dbca9 100644
--- a/gfx/gl/shadowStenciller.h
+++ b/gfx/gl/shadowStenciller.h
@@ -13,10 +13,10 @@ public:
 
 	ShadowStenciller();
 
-	static void configureStencilTexture(glTexture &, GLsizei width, GLsizei height);
+	static void configureStencilTexture(glTexture<GL_TEXTURE_2D_ARRAY> &, ImageDimensions);
 	void setLightDirection(const LightDirection & lightDir);
 	[[nodiscard]] Direction2D getLightDirection() const;
-	void renderStencil(const glTexture &, const MeshBase &, Texture::AnyPtr texture) const;
+	void renderStencil(const glTexture<GL_TEXTURE_2D_ARRAY> &, const MeshBase &, Texture::AnyPtr texture) const;
 
 private:
 	glFrameBuffer fbo;