[core] move Texture related enums to gfx namespace

19 files changed, 166 insertions, 116 deletions

diff --git a/src/mbgl/geometry/line_atlas.cpp b/src/mbgl/geometry/line_atlas.cpp
index 1bd6f987e1..e0114befcb 100644
--- a/src/mbgl/geometry/line_atlas.cpp
+++ b/src/mbgl/geometry/line_atlas.cpp
@@ -138,8 +138,8 @@ void LineAtlas::upload(gl::Context& context, gl::TextureUnit unit) {
 
 void LineAtlas::bind(gl::Context& context, gl::TextureUnit unit) {
     upload(context, unit);
-    context.bindTexture(*texture, unit, gl::TextureFilter::Linear, gl::TextureMipMap::No,
-                        gl::TextureWrap::Repeat, gl::TextureWrap::Clamp);
+    context.bindTexture(*texture, unit, gfx::TextureFilterType::Linear, gfx::TextureMipMapType::No,
+                        gfx::TextureWrapType::Repeat, gfx::TextureWrapType::Clamp);
 }
 
 } // namespace mbgl
diff --git a/src/mbgl/gfx/types.hpp b/src/mbgl/gfx/types.hpp
index 6082d99017..4c6a040b1f 100644
--- a/src/mbgl/gfx/types.hpp
+++ b/src/mbgl/gfx/types.hpp
@@ -133,5 +133,33 @@ enum class BufferUsageType : uint8_t {
     DynamicDraw,
 };
 
+enum class TexturePixelType : uint8_t {
+    RGBA,
+    Alpha,
+    Stencil,
+    Depth,
+    Luminance,
+};
+
+enum class TextureChannelDataType : uint8_t {
+    UnsignedByte,
+    HalfFloat,
+};
+
+enum class TextureMipMapType : bool {
+    No,
+    Yes
+};
+
+enum class TextureFilterType : bool {
+    Nearest,
+    Linear,
+};
+
+enum class TextureWrapType : bool {
+    Clamp,
+    Repeat,
+};
+
 } // namespace gfx
 } // namespace mbgl
diff --git a/src/mbgl/gl/context.cpp b/src/mbgl/gl/context.cpp
index df304eb7d4..c8236e0b0a 100644
--- a/src/mbgl/gl/context.cpp
+++ b/src/mbgl/gl/context.cpp
@@ -43,20 +43,6 @@ static_assert(std::is_same<VertexArrayID, GLuint>::value, "OpenGL type mismatch"
 static_assert(std::is_same<FramebufferID, GLuint>::value, "OpenGL type mismatch");
 static_assert(std::is_same<RenderbufferID, GLuint>::value, "OpenGL type mismatch");
 
-static_assert(std::is_same<std::underlying_type_t<TextureFormat>, GLenum>::value, "OpenGL type mismatch");
-static_assert(underlying_type(TextureFormat::RGBA) == GL_RGBA, "OpenGL type mismatch");
-static_assert(underlying_type(TextureFormat::Alpha) == GL_ALPHA, "OpenGL type mismatch");
-
-static_assert(std::is_same<std::underlying_type_t<TextureType>, GLenum>::value, "OpenGL type mismatch");
-static_assert(underlying_type(TextureType::UnsignedByte) == GL_UNSIGNED_BYTE, "OpenGL type mismatch");
-
-#if MBGL_USE_GLES2 && GL_HALF_FLOAT_OES
-static_assert(underlying_type(TextureType::HalfFloat) == GL_HALF_FLOAT_OES, "OpenGL type mismatch");
-#endif
-#if !MBGL_USE_GLES2 && GL_HALF_FLOAT_ARB
-static_assert(underlying_type(TextureType::HalfFloat) == GL_HALF_FLOAT_ARB, "OpenGL type mismatch");
-#endif
-
 static_assert(underlying_type(UniformDataType::Float) == GL_FLOAT, "OpenGL type mismatch");
 static_assert(underlying_type(UniformDataType::FloatVec2) == GL_FLOAT_VEC2, "OpenGL type mismatch");
 static_assert(underlying_type(UniformDataType::FloatVec3) == GL_FLOAT_VEC3, "OpenGL type mismatch");
@@ -374,16 +360,17 @@ UniqueRenderbuffer Context::createRenderbuffer(const RenderbufferType type, cons
     return renderbuffer;
 }
 
-std::unique_ptr<uint8_t[]> Context::readFramebuffer(const Size size, const TextureFormat format, const bool flip) {
-    const size_t stride = size.width * (format == TextureFormat::RGBA ? 4 : 1);
+std::unique_ptr<uint8_t[]> Context::readFramebuffer(const Size size, const gfx::TexturePixelType format, const bool flip) {
+    const size_t stride = size.width * (format == gfx::TexturePixelType::RGBA ? 4 : 1);
     auto data = std::make_unique<uint8_t[]>(stride * size.height);
 
     // When reading data from the framebuffer, make sure that we are storing the values
     // tightly packed into the buffer to avoid buffer overruns.
     pixelStorePack = { 1 };
 
-    MBGL_CHECK_ERROR(glReadPixels(0, 0, size.width, size.height, static_cast<GLenum>(format),
-                                  GL_UNSIGNED_BYTE, data.get()));
+    MBGL_CHECK_ERROR(glReadPixels(0, 0, size.width, size.height,
+                                  Enum<gfx::TexturePixelType>::to(format), GL_UNSIGNED_BYTE,
+                                  data.get()));
 
     if (flip) {
         auto tmp = std::make_unique<uint8_t[]>(stride);
@@ -399,12 +386,13 @@ std::unique_ptr<uint8_t[]> Context::readFramebuffer(const Size size, const Textu
 }
 
 #if not MBGL_USE_GLES2
-void Context::drawPixels(const Size size, const void* data, TextureFormat format) {
+void Context::drawPixels(const Size size, const void* data, gfx::TexturePixelType format) {
     pixelStoreUnpack = { 1 };
-    if (format != TextureFormat::RGBA) {
-        format = static_cast<TextureFormat>(GL_LUMINANCE);
+    // TODO
+    if (format != gfx::TexturePixelType::RGBA) {
+        format = gfx::TexturePixelType::Luminance;
     }
-    MBGL_CHECK_ERROR(glDrawPixels(size.width, size.height, static_cast<GLenum>(format),
+    MBGL_CHECK_ERROR(glDrawPixels(size.width, size.height, Enum<gfx::TexturePixelType>::to(format),
                                   GL_UNSIGNED_BYTE, data));
 }
 #endif // MBGL_USE_GLES2
@@ -517,8 +505,11 @@ Context::createFramebuffer(const Texture& color,
     return { depthTarget.size, std::move(fbo) };
 }
 
-UniqueTexture
-Context::createTexture(const Size size, const void* data, TextureFormat format, TextureUnit unit, TextureType type) {
+UniqueTexture Context::createTexture(const Size size,
+                                     const void* data,
+                                     gfx::TexturePixelType format,
+                                     TextureUnit unit,
+                                     gfx::TextureChannelDataType type) {
     auto obj = createTexture();
     pixelStoreUnpack = { 1 };
     updateTexture(obj, size, data, format, unit, type);
@@ -531,21 +522,26 @@ Context::createTexture(const Size size, const void* data, TextureFormat format,
     return obj;
 }
 
-void Context::updateTexture(
-    TextureID id, const Size size, const void* data, TextureFormat format, TextureUnit unit, TextureType type) {
+void Context::updateTexture(TextureID id,
+                            const Size size,
+                            const void* data,
+                            gfx::TexturePixelType format,
+                            TextureUnit unit,
+                            gfx::TextureChannelDataType type) {
     activeTextureUnit = unit;
     texture[unit] = id;
-    MBGL_CHECK_ERROR(glTexImage2D(GL_TEXTURE_2D, 0, static_cast<GLenum>(format), size.width,
-                                  size.height, 0, static_cast<GLenum>(format), static_cast<GLenum>(type),
-                                  data));
+    MBGL_CHECK_ERROR(glTexImage2D(GL_TEXTURE_2D, 0, Enum<gfx::TexturePixelType>::to(format),
+                                  size.width, size.height, 0,
+                                  Enum<gfx::TexturePixelType>::to(format),
+                                  Enum<gfx::TextureChannelDataType>::to(type), data));
 }
 
 void Context::bindTexture(Texture& obj,
                           TextureUnit unit,
-                          TextureFilter filter,
-                          TextureMipMap mipmap,
-                          TextureWrap wrapX,
-                          TextureWrap wrapY) {
+                          gfx::TextureFilterType filter,
+                          gfx::TextureMipMapType mipmap,
+                          gfx::TextureWrapType wrapX,
+                          gfx::TextureWrapType wrapY) {
     if (filter != obj.filter || mipmap != obj.mipmap || wrapX != obj.wrapX || wrapY != obj.wrapY) {
         activeTextureUnit = unit;
         texture[unit] = obj.texture;
@@ -553,12 +549,12 @@ void Context::bindTexture(Texture& obj,
         if (filter != obj.filter || mipmap != obj.mipmap) {
             MBGL_CHECK_ERROR(glTexParameteri(
                 GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
-                filter == TextureFilter::Linear
-                    ? (mipmap == TextureMipMap::Yes ? GL_LINEAR_MIPMAP_NEAREST : GL_LINEAR)
-                    : (mipmap == TextureMipMap::Yes ? GL_NEAREST_MIPMAP_NEAREST : GL_NEAREST)));
+                filter == gfx::TextureFilterType::Linear
+                    ? (mipmap == gfx::TextureMipMapType::Yes ? GL_LINEAR_MIPMAP_NEAREST : GL_LINEAR)
+                    : (mipmap == gfx::TextureMipMapType::Yes ? GL_NEAREST_MIPMAP_NEAREST : GL_NEAREST)));
             MBGL_CHECK_ERROR(
                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
-                                filter == TextureFilter::Linear ? GL_LINEAR : GL_NEAREST));
+                                filter == gfx::TextureFilterType::Linear ? GL_LINEAR : GL_NEAREST));
             obj.filter = filter;
             obj.mipmap = mipmap;
         }
@@ -566,13 +562,13 @@ void Context::bindTexture(Texture& obj,
 
             MBGL_CHECK_ERROR(
                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
-                                wrapX == TextureWrap::Clamp ? GL_CLAMP_TO_EDGE : GL_REPEAT));
+                                wrapX == gfx::TextureWrapType::Clamp ? GL_CLAMP_TO_EDGE : GL_REPEAT));
             obj.wrapX = wrapX;
         }
         if (wrapY != obj.wrapY) {
             MBGL_CHECK_ERROR(
                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
-                                wrapY == TextureWrap::Clamp ? GL_CLAMP_TO_EDGE : GL_REPEAT));
+                                wrapY == gfx::TextureWrapType::Clamp ? GL_CLAMP_TO_EDGE : GL_REPEAT));
             obj.wrapY = wrapY;
         }
     } else if (texture[unit] != obj.texture) {
diff --git a/src/mbgl/gl/context.hpp b/src/mbgl/gl/context.hpp
index 70ba1ec107..8b7b9346b3 100644
--- a/src/mbgl/gl/context.hpp
+++ b/src/mbgl/gl/context.hpp
@@ -81,10 +81,10 @@ public:
                                   const Renderbuffer<RenderbufferType::DepthComponent>&);
 
     template <typename Image,
-              TextureFormat format = Image::channels == 4 ? TextureFormat::RGBA
-                                                          : TextureFormat::Alpha>
+              gfx::TexturePixelType format = Image::channels == 4 ? gfx::TexturePixelType::RGBA
+                                                          : gfx::TexturePixelType::Alpha>
     Image readFramebuffer(const Size size, bool flip = true) {
-        static_assert(Image::channels == (format == TextureFormat::RGBA ? 4 : 1),
+        static_assert(Image::channels == (format == gfx::TexturePixelType::RGBA ? 4 : 1),
                       "image format mismatch");
         return { size, readFramebuffer(size, format, flip) };
     }
@@ -92,7 +92,7 @@ public:
 #if not MBGL_USE_GLES2
     template <typename Image>
     void drawPixels(const Image& image) {
-        auto format = image.channels == 4 ? TextureFormat::RGBA : TextureFormat::Alpha;
+        auto format = image.channels == 4 ? gfx::TexturePixelType::RGBA : gfx::TexturePixelType::Alpha;
         drawPixels(image.size, image.data.get(), format);
     }
 #endif // MBGL_USE_GLES2
@@ -101,8 +101,8 @@ public:
     template <typename Image>
     Texture createTexture(const Image& image,
                           TextureUnit unit = 0,
-                          TextureType type = TextureType::UnsignedByte) {
-        auto format = image.channels == 4 ? TextureFormat::RGBA : TextureFormat::Alpha;
+                          gfx::TextureChannelDataType type = gfx::TextureChannelDataType::UnsignedByte) {
+        auto format = image.channels == 4 ? gfx::TexturePixelType::RGBA : gfx::TexturePixelType::Alpha;
         return { image.size, createTexture(image.size, image.data.get(), format, unit, type) };
     }
 
@@ -110,26 +110,26 @@ public:
     void updateTexture(Texture& obj,
                        const Image& image,
                        TextureUnit unit = 0,
-                       TextureType type = TextureType::UnsignedByte) {
-        auto format = image.channels == 4 ? TextureFormat::RGBA : TextureFormat::Alpha;
+                       gfx::TextureChannelDataType type = gfx::TextureChannelDataType::UnsignedByte) {
+        auto format = image.channels == 4 ? gfx::TexturePixelType::RGBA : gfx::TexturePixelType::Alpha;
         updateTexture(obj.texture.get(), image.size, image.data.get(), format, unit, type);
         obj.size = image.size;
     }
 
     // Creates an empty texture with the specified dimensions.
     Texture createTexture(const Size size,
-                          TextureFormat format = TextureFormat::RGBA,
+                          gfx::TexturePixelType format = gfx::TexturePixelType::RGBA,
                           TextureUnit unit = 0,
-                          TextureType type = TextureType::UnsignedByte) {
+                          gfx::TextureChannelDataType type = gfx::TextureChannelDataType::UnsignedByte) {
         return { size, createTexture(size, nullptr, format, unit, type) };
     }
 
     void bindTexture(Texture&,
                      TextureUnit = 0,
-                     TextureFilter = TextureFilter::Nearest,
-                     TextureMipMap = TextureMipMap::No,
-                     TextureWrap wrapX = TextureWrap::Clamp,
-                     TextureWrap wrapY = TextureWrap::Clamp);
+                     gfx::TextureFilterType = gfx::TextureFilterType::Nearest,
+                     gfx::TextureMipMapType = gfx::TextureMipMapType::No,
+                     gfx::TextureWrapType wrapX = gfx::TextureWrapType::Clamp,
+                     gfx::TextureWrapType wrapY = gfx::TextureWrapType::Clamp);
 
     void clear(optional<mbgl::Color> color,
                optional<float> depth,
@@ -248,13 +248,13 @@ private:
     std::unique_ptr<const gfx::IndexBufferResource> createIndexBufferResource(const void* data, std::size_t size, const gfx::BufferUsageType) override;
     void updateIndexBufferResource(const gfx::IndexBufferResource&, const void* data, std::size_t size) override;
 
-    UniqueTexture createTexture(Size size, const void* data, TextureFormat, TextureUnit, TextureType);
-    void updateTexture(TextureID, Size size, const void* data, TextureFormat, TextureUnit, TextureType);
+    UniqueTexture createTexture(Size size, const void* data, gfx::TexturePixelType, TextureUnit, gfx::TextureChannelDataType);
+    void updateTexture(TextureID, Size size, const void* data, gfx::TexturePixelType, TextureUnit, gfx::TextureChannelDataType);
     UniqueFramebuffer createFramebuffer();
     UniqueRenderbuffer createRenderbuffer(RenderbufferType, Size size);
-    std::unique_ptr<uint8_t[]> readFramebuffer(Size, TextureFormat, bool flip);
+    std::unique_ptr<uint8_t[]> readFramebuffer(Size, gfx::TexturePixelType, bool flip);
 #if not MBGL_USE_GLES2
-    void drawPixels(Size size, const void* data, TextureFormat);
+    void drawPixels(Size size, const void* data, gfx::TexturePixelType);
 #endif // MBGL_USE_GLES2
 
     bool supportsVertexArrays() const;
diff --git a/src/mbgl/gl/defines.hpp b/src/mbgl/gl/defines.hpp
index 41c4cb07d6..75325dfb75 100644
--- a/src/mbgl/gl/defines.hpp
+++ b/src/mbgl/gl/defines.hpp
@@ -39,6 +39,7 @@
 #define GL_DEPTH_ATTACHMENT 0x8D00
 #define GL_DEPTH_BUFFER_BIT 0x00000100
 #define GL_DEPTH_CLEAR_VALUE 0x0B73
+#define GL_DEPTH_COMPONENT 0x1902
 #define GL_DEPTH_COMPONENT16 0x81A5
 #define GL_DEPTH_FUNC 0x0B74
 #define GL_DEPTH_RANGE 0x0B70
@@ -97,6 +98,7 @@
 #define GL_LINE_STRIP 0x0003
 #define GL_LINE_WIDTH 0x0B21
 #define GL_LINK_STATUS 0x8B82
+#define GL_LUMINANCE 0x1909
 #define GL_MAX_VERTEX_ATTRIBS 0x8869
 #define GL_NEAREST 0x2600
 #define GL_NEAREST_MIPMAP_NEAREST 0x2700
@@ -133,6 +135,7 @@
 #define GL_STENCIL_CLEAR_VALUE 0x0B91
 #define GL_STENCIL_FAIL 0x0B94
 #define GL_STENCIL_FUNC 0x0B92
+#define GL_STENCIL_INDEX 0x1901
 #define GL_STENCIL_PASS_DEPTH_FAIL 0x0B95
 #define GL_STENCIL_PASS_DEPTH_PASS 0x0B96
 #define GL_STENCIL_REF 0x0B97
@@ -159,15 +162,16 @@
 #define GL_VIEWPORT 0x0BA2
 #define GL_ZERO 0
 
-#ifndef MBGL_USE_GLES2
+#ifdef MBGL_USE_GLES2
+#define GL_HALF_FLOAT 0x8D61
+#else
 #define GL_CURRENT_RASTER_POSITION 0x0B07
 #define GL_DEPTH24_STENCIL8 0x88F0
 #define GL_DEPTH_BIAS 0x0D1F
-#define GL_DEPTH_COMPONENT 0x1902
 #define GL_DEPTH_SCALE 0x0D1E
+#define GL_HALF_FLOAT 0x140B
 #define GL_INDEX_OFFSET 0x0D13
 #define GL_INDEX_SHIFT 0x0D12
-#define GL_LUMINANCE 0x1909
 #define GL_POINT_SIZE 0x0B11
 #define GL_RGBA8 0x8058
 #define GL_ZOOM_X 0x0D16
diff --git a/src/mbgl/gl/enum.cpp b/src/mbgl/gl/enum.cpp
index 81561360e9..c1a51944de 100644
--- a/src/mbgl/gl/enum.cpp
+++ b/src/mbgl/gl/enum.cpp
@@ -241,5 +241,47 @@ platform::GLenum Enum<gfx::BufferUsageType>::to(const gfx::BufferUsageType value
     return GL_INVALID_ENUM;
 }
 
+template <>
+gfx::TexturePixelType Enum<gfx::TexturePixelType>::from(const platform::GLint value) {
+    switch (value) {
+        case GL_RGBA: return gfx::TexturePixelType::RGBA;
+        case GL_ALPHA: return gfx::TexturePixelType::Alpha;
+        case GL_STENCIL_INDEX: return gfx::TexturePixelType::Stencil;
+        case GL_DEPTH_COMPONENT: return gfx::TexturePixelType::Depth;
+        case GL_LUMINANCE: return gfx::TexturePixelType::Luminance;
+    }
+    return {};
+}
+
+template <>
+platform::GLenum Enum<gfx::TexturePixelType>::to(const gfx::TexturePixelType value) {
+    switch (value) {
+        case gfx::TexturePixelType::RGBA: return GL_RGBA;
+        case gfx::TexturePixelType::Alpha: return GL_ALPHA;
+        case gfx::TexturePixelType::Stencil: return GL_STENCIL_INDEX;
+        case gfx::TexturePixelType::Depth: return GL_DEPTH_COMPONENT;
+        case gfx::TexturePixelType::Luminance: return GL_LUMINANCE;
+    }
+    return GL_INVALID_ENUM;
+}
+
+template <>
+gfx::TextureChannelDataType Enum<gfx::TextureChannelDataType>::from(const platform::GLint value) {
+    switch (value) {
+        case GL_UNSIGNED_BYTE: return gfx::TextureChannelDataType::UnsignedByte;
+        case GL_HALF_FLOAT: return gfx::TextureChannelDataType::HalfFloat;
+    }
+    return {};
+}
+
+template <>
+platform::GLenum Enum<gfx::TextureChannelDataType>::to(const gfx::TextureChannelDataType value) {
+    switch (value) {
+        case gfx::TextureChannelDataType::UnsignedByte: return GL_UNSIGNED_BYTE;
+        case gfx::TextureChannelDataType::HalfFloat: return GL_HALF_FLOAT;
+    }
+    return GL_INVALID_ENUM;
+}
+
 } // namespace gl
 } // namespace mbgl
diff --git a/src/mbgl/gl/texture.hpp b/src/mbgl/gl/texture.hpp
index 625e69233a..1b85ac6ebc 100644
--- a/src/mbgl/gl/texture.hpp
+++ b/src/mbgl/gl/texture.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <mbgl/gfx/types.hpp>
 #include <mbgl/gl/object.hpp>
 #include <mbgl/util/size.hpp>
 
@@ -9,10 +10,10 @@ namespace gl {
 class Texture {
 public:
     Texture(Size size_, UniqueTexture texture_,
-            TextureFilter filter_ = TextureFilter::Nearest,
-            TextureMipMap mipmap_ = TextureMipMap::No,
-            TextureWrap wrapX_ = TextureWrap::Clamp,
-            TextureWrap wrapY_ = TextureWrap::Clamp)
+            gfx::TextureFilterType filter_ = gfx::TextureFilterType::Nearest,
+            gfx::TextureMipMapType mipmap_ = gfx::TextureMipMapType::No,
+            gfx::TextureWrapType wrapX_ = gfx::TextureWrapType::Clamp,
+            gfx::TextureWrapType wrapY_ = gfx::TextureWrapType::Clamp)
         : size(std::move(size_)),
           texture(std::move(texture_)),
           filter(filter_),
@@ -22,10 +23,10 @@ public:
 
     Size size;
     UniqueTexture texture;
-    TextureFilter filter;
-    TextureMipMap mipmap;
-    TextureWrap wrapX;
-    TextureWrap wrapY;
+    gfx::TextureFilterType filter;
+    gfx::TextureMipMapType mipmap;
+    gfx::TextureWrapType wrapX;
+    gfx::TextureWrapType wrapY;
 };
 
 } // namespace gl
diff --git a/src/mbgl/gl/types.hpp b/src/mbgl/gl/types.hpp
index 310960b970..ab6b72656b 100644
--- a/src/mbgl/gl/types.hpp
+++ b/src/mbgl/gl/types.hpp
@@ -42,27 +42,6 @@ enum class RenderbufferType : uint32_t {
 #endif // MBGL_USE_GLES2
 };
 
-enum class TextureMipMap : bool { No = false, Yes = true };
-enum class TextureFilter : bool { Nearest = false, Linear = true };
-enum class TextureWrap : bool { Clamp, Repeat };
-enum class TextureFormat : uint32_t {
-    RGBA = 0x1908,
-    Alpha = 0x1906,
-#if not MBGL_USE_GLES2
-    Stencil = 0x1901,
-    Depth = 0x1902,
-#endif // MBGL_USE_GLES2
-};
-
-enum class TextureType : uint32_t {
-    UnsignedByte = 0x1401,
-#if MBGL_USE_GLES2
-    HalfFloat = 0x8D61,
-#else
-    HalfFloat = 0x140B,
-#endif // MBGL_USE_GLES2
-};
-
 struct PixelStorageType {
     int32_t alignment;
 };
diff --git a/src/mbgl/renderer/image_manager.cpp b/src/mbgl/renderer/image_manager.cpp
index fc1f5bb167..594d79b5cb 100644
--- a/src/mbgl/renderer/image_manager.cpp
+++ b/src/mbgl/renderer/image_manager.cpp
@@ -179,7 +179,7 @@ void ImageManager::upload(gl::Context& context, gl::TextureUnit unit) {
 
 void ImageManager::bind(gl::Context& context, gl::TextureUnit unit) {
     upload(context, unit);
-    context.bindTexture(*atlasTexture, unit, gl::TextureFilter::Linear);
+    context.bindTexture(*atlasTexture, unit, gfx::TextureFilterType::Linear);
 }
 
 } // namespace mbgl
diff --git a/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp b/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp
index 3224397fb7..d6ce18e85a 100644
--- a/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp
+++ b/src/mbgl/renderer/layers/render_fill_extrusion_layer.cpp
@@ -136,7 +136,7 @@ void RenderFillExtrusionLayer::render(PaintParameters& parameters, RenderSource*
                 GeometryTile& geometryTile = static_cast<GeometryTile&>(tile.tile);
                 optional<ImagePosition> patternPosA = geometryTile.getPattern(fillPatternValue.from);
                 optional<ImagePosition> patternPosB = geometryTile.getPattern(fillPatternValue.to);
-                parameters.context.bindTexture(*geometryTile.iconAtlasTexture, 0, gl::TextureFilter::Linear);
+                parameters.context.bindTexture(*geometryTile.iconAtlasTexture, 0, gfx::TextureFilterType::Linear);
                 FillExtrusionBucket& bucket = *bucket_;
 
                 draw(
diff --git a/src/mbgl/renderer/layers/render_fill_layer.cpp b/src/mbgl/renderer/layers/render_fill_layer.cpp
index 51019875e3..5498031c4c 100644
--- a/src/mbgl/renderer/layers/render_fill_layer.cpp
+++ b/src/mbgl/renderer/layers/render_fill_layer.cpp
@@ -148,7 +148,7 @@ void RenderFillLayer::render(PaintParameters& parameters, RenderSource*) {
             optional<ImagePosition> patternPosA = geometryTile.getPattern(fillPatternValue.from);
             optional<ImagePosition> patternPosB = geometryTile.getPattern(fillPatternValue.to);
 
-            parameters.context.bindTexture(*geometryTile.iconAtlasTexture, 0, gl::TextureFilter::Linear);
+            parameters.context.bindTexture(*geometryTile.iconAtlasTexture, 0, gfx::TextureFilterType::Linear);
             auto bucket_ = tile.tile.getBucket<FillBucket>(*baseImpl);
             if (!bucket_) {
                 continue;
diff --git a/src/mbgl/renderer/layers/render_heatmap_layer.cpp b/src/mbgl/renderer/layers/render_heatmap_layer.cpp
index a3a9a67de5..66421874af 100644
--- a/src/mbgl/renderer/layers/render_heatmap_layer.cpp
+++ b/src/mbgl/renderer/layers/render_heatmap_layer.cpp
@@ -56,7 +56,7 @@ void RenderHeatmapLayer::render(PaintParameters& parameters, RenderSource*) {
 
         if (!renderTexture || renderTexture->getSize() != size) {
             if (parameters.context.supportsHalfFloatTextures) {
-                renderTexture = OffscreenTexture(parameters.context, size, gl::TextureType::HalfFloat);
+                renderTexture = OffscreenTexture(parameters.context, size, gfx::TextureChannelDataType::HalfFloat);
 
                 try {
                     renderTexture->bind();
@@ -68,7 +68,7 @@ void RenderHeatmapLayer::render(PaintParameters& parameters, RenderSource*) {
             }
 
             if (!parameters.context.supportsHalfFloatTextures || !renderTexture) {
-                renderTexture = OffscreenTexture(parameters.context, size, gl::TextureType::UnsignedByte);
+                renderTexture = OffscreenTexture(parameters.context, size, gfx::TextureChannelDataType::UnsignedByte);
                 renderTexture->bind();
             }
 
@@ -77,7 +77,7 @@ void RenderHeatmapLayer::render(PaintParameters& parameters, RenderSource*) {
         }
 
         if (!colorRampTexture) {
-            colorRampTexture = parameters.context.createTexture(colorRamp, 1, gl::TextureType::UnsignedByte);
+            colorRampTexture = parameters.context.createTexture(colorRamp, 1, gfx::TextureChannelDataType::UnsignedByte);
         }
 
         parameters.context.clear(Color{ 0.0f, 0.0f, 0.0f, 1.0f }, {}, {});
@@ -133,8 +133,8 @@ void RenderHeatmapLayer::render(PaintParameters& parameters, RenderSource*) {
         }
 
     } else if (parameters.pass == RenderPass::Translucent) {
-        parameters.context.bindTexture(renderTexture->getTexture(), 0, gl::TextureFilter::Linear);
-        parameters.context.bindTexture(*colorRampTexture, 1, gl::TextureFilter::Linear);
+        parameters.context.bindTexture(renderTexture->getTexture(), 0, gfx::TextureFilterType::Linear);
+        parameters.context.bindTexture(*colorRampTexture, 1, gfx::TextureFilterType::Linear);
 
         const auto& size = parameters.staticData.backendSize;
 
diff --git a/src/mbgl/renderer/layers/render_hillshade_layer.cpp b/src/mbgl/renderer/layers/render_hillshade_layer.cpp
index b7b8beb2ef..438d6a345f 100644
--- a/src/mbgl/renderer/layers/render_hillshade_layer.cpp
+++ b/src/mbgl/renderer/layers/render_hillshade_layer.cpp
@@ -130,7 +130,7 @@ void RenderHillshadeLayer::render(PaintParameters& parameters, RenderSource* src
             OffscreenTexture view(parameters.context, { tilesize, tilesize });
             view.bind();
             
-            parameters.context.bindTexture(*bucket.dem, 0, gl::TextureFilter::Nearest, gl::TextureMipMap::No, gl::TextureWrap::Clamp, gl::TextureWrap::Clamp);
+            parameters.context.bindTexture(*bucket.dem, 0, gfx::TextureFilterType::Nearest, gfx::TextureMipMapType::No, gfx::TextureWrapType::Clamp, gfx::TextureWrapType::Clamp);
             const Properties<>::PossiblyEvaluated properties;
             const HillshadePrepareProgram::Binders paintAttributeData{ properties, 0 };
             
@@ -173,7 +173,7 @@ void RenderHillshadeLayer::render(PaintParameters& parameters, RenderSource* src
             bucket.setPrepared(true);
         } else if (parameters.pass == RenderPass::Translucent) {
             assert(bucket.texture);
-            parameters.context.bindTexture(*bucket.texture, 0, gl::TextureFilter::Linear, gl::TextureMipMap::No, gl::TextureWrap::Clamp, gl::TextureWrap::Clamp);
+            parameters.context.bindTexture(*bucket.texture, 0, gfx::TextureFilterType::Linear, gfx::TextureMipMapType::No, gfx::TextureWrapType::Clamp, gfx::TextureWrapType::Clamp);
 
             if (bucket.vertexBuffer && bucket.indexBuffer && !bucket.segments.empty()) {
                 // Draw only the parts of the tile that aren't drawn by another tile in the layer.
diff --git a/src/mbgl/renderer/layers/render_line_layer.cpp b/src/mbgl/renderer/layers/render_line_layer.cpp
index b0c441f5a1..b38bc490a6 100644
--- a/src/mbgl/renderer/layers/render_line_layer.cpp
+++ b/src/mbgl/renderer/layers/render_line_layer.cpp
@@ -124,7 +124,7 @@ void RenderLineLayer::render(PaintParameters& parameters, RenderSource*) {
             const auto linePatternValue =  evaluated.get<LinePattern>().constantOr(Faded<std::basic_string<char>>{ "", ""});
             assert(dynamic_cast<GeometryTile*>(&tile.tile));
             GeometryTile& geometryTile = static_cast<GeometryTile&>(tile.tile);
-            parameters.context.bindTexture(*geometryTile.iconAtlasTexture, 0, gl::TextureFilter::Linear);
+            parameters.context.bindTexture(*geometryTile.iconAtlasTexture, 0, gfx::TextureFilterType::Linear);
             const Size texsize = geometryTile.iconAtlasTexture->size;
 
             optional<ImagePosition> posA = geometryTile.getPattern(linePatternValue.from);
@@ -145,7 +145,7 @@ void RenderLineLayer::render(PaintParameters& parameters, RenderSource*) {
             if (!colorRampTexture) {
                 colorRampTexture = parameters.context.createTexture(colorRamp);
             }
-            parameters.context.bindTexture(*colorRampTexture, 0, gl::TextureFilter::Linear);
+            parameters.context.bindTexture(*colorRampTexture, 0, gfx::TextureFilterType::Linear);
 
             draw(parameters.programs.getLineLayerPrograms().lineGradient,
                  LineGradientProgram::uniformValues(
diff --git a/src/mbgl/renderer/layers/render_raster_layer.cpp b/src/mbgl/renderer/layers/render_raster_layer.cpp
index 1912c84fc7..30b180173c 100644
--- a/src/mbgl/renderer/layers/render_raster_layer.cpp
+++ b/src/mbgl/renderer/layers/render_raster_layer.cpp
@@ -123,7 +123,7 @@ void RenderRasterLayer::render(PaintParameters& parameters, RenderSource* source
         );
     };
 
-    const gl::TextureFilter filter = evaluated.get<RasterResampling>() == RasterResamplingType::Nearest ? gl::TextureFilter::Nearest : gl::TextureFilter::Linear;
+    const gfx::TextureFilterType filter = evaluated.get<RasterResampling>() == RasterResamplingType::Nearest ? gfx::TextureFilterType::Nearest : gfx::TextureFilterType::Linear;
 
     if (RenderImageSource* imageSource = source->as<RenderImageSource>()) {
         if (imageSource->isEnabled() && imageSource->isLoaded() && !imageSource->bucket->needsUpload()) {
diff --git a/src/mbgl/renderer/layers/render_symbol_layer.cpp b/src/mbgl/renderer/layers/render_symbol_layer.cpp
index 19edb6afbd..11eeb376ce 100644
--- a/src/mbgl/renderer/layers/render_symbol_layer.cpp
+++ b/src/mbgl/renderer/layers/render_symbol_layer.cpp
@@ -158,7 +158,7 @@ void RenderSymbolLayer::render(PaintParameters& parameters, RenderSource*) {
 
             parameters.context.bindTexture(*geometryTile.iconAtlasTexture, 0,
                 bucket.sdfIcons || parameters.state.isChanging() || iconScaled || iconTransformed
-                    ? gl::TextureFilter::Linear : gl::TextureFilter::Nearest);
+                    ? gfx::TextureFilterType::Linear : gfx::TextureFilterType::Nearest);
 
             const Size texsize = geometryTile.iconAtlasTexture->size;
 
@@ -194,7 +194,7 @@ void RenderSymbolLayer::render(PaintParameters& parameters, RenderSource*) {
         }
 
         if (bucket.hasTextData()) {
-            parameters.context.bindTexture(*geometryTile.glyphAtlasTexture, 0, gl::TextureFilter::Linear);
+            parameters.context.bindTexture(*geometryTile.glyphAtlasTexture, 0, gfx::TextureFilterType::Linear);
 
             auto values = textPropertyValues(evaluated_, layout);
             const auto& paintPropertyValues = textPaintProperties(evaluated_);
diff --git a/src/mbgl/renderer/renderer_impl.cpp b/src/mbgl/renderer/renderer_impl.cpp
index aee7a243d4..8aa3690524 100644
--- a/src/mbgl/renderer/renderer_impl.cpp
+++ b/src/mbgl/renderer/renderer_impl.cpp
@@ -487,7 +487,7 @@ void Renderer::Impl::render(const UpdateParameters& updateParameters) {
 
         // Read the stencil buffer
         const auto viewport = parameters.context.viewport.getCurrentValue();
-        auto image = parameters.context.readFramebuffer<AlphaImage, gl::TextureFormat::Stencil>(viewport.size, false);
+        auto image = parameters.context.readFramebuffer<AlphaImage, gfx::TexturePixelType::Stencil>(viewport.size, false);
 
         // Scale the Stencil buffer to cover the entire color space.
         auto it = image.data.get();
@@ -572,7 +572,7 @@ void Renderer::Impl::render(const UpdateParameters& updateParameters) {
 
         // Read the stencil buffer
         auto viewport = parameters.context.viewport.getCurrentValue();
-        auto image = parameters.context.readFramebuffer<AlphaImage, gl::TextureFormat::Depth>(viewport.size, false);
+        auto image = parameters.context.readFramebuffer<AlphaImage, gfx::TexturePixelType::Depth>(viewport.size, false);
 
         parameters.context.pixelZoom = { 1, 1 };
         parameters.context.rasterPos = { -1, -1, 0, 1 };
diff --git a/src/mbgl/util/offscreen_texture.cpp b/src/mbgl/util/offscreen_texture.cpp
index 03f555eae0..bf42f98ceb 100644
--- a/src/mbgl/util/offscreen_texture.cpp
+++ b/src/mbgl/util/offscreen_texture.cpp
@@ -11,21 +11,21 @@ OffscreenTexture& OffscreenTexture::operator=(OffscreenTexture&&) = default;
 
 class OffscreenTexture::Impl {
 public:
-    Impl(gl::Context& context_, const Size size_, const gl::TextureType type_)
+    Impl(gl::Context& context_, const Size size_, const gfx::TextureChannelDataType type_)
         : context(context_), size(std::move(size_)), type(type_) {
         assert(!size.isEmpty());
     }
     Impl(gl::Context& context_,
          const Size size_,
          gl::Renderbuffer<gl::RenderbufferType::DepthComponent>& depth_,
-         const gl::TextureType type_)
+         const gfx::TextureChannelDataType type_)
         : context(context_), size(std::move(size_)), depth(&depth_), type(type_) {
         assert(!size.isEmpty());
     }
 
     void bind() {
         if (!framebuffer) {
-            texture = context.createTexture(size, gl::TextureFormat::RGBA, 0, type);
+            texture = context.createTexture(size, gfx::TexturePixelType::RGBA, 0, type);
             if (depth) {
                 framebuffer = context.createFramebuffer(*texture, *depth);
             } else {
@@ -59,12 +59,12 @@ private:
     optional<gl::Framebuffer> framebuffer;
     optional<gl::Texture> texture;
     gl::Renderbuffer<gl::RenderbufferType::DepthComponent>* depth = nullptr;
-    const gl::TextureType type;
+    const gfx::TextureChannelDataType type;
 };
 
 OffscreenTexture::OffscreenTexture(gl::Context& context,
                                    const Size size,
-                                   const gl::TextureType type)
+                                   const gfx::TextureChannelDataType type)
     : impl(std::make_unique<Impl>(context, std::move(size), type)) {
     assert(!size.isEmpty());
 }
@@ -72,7 +72,7 @@ OffscreenTexture::OffscreenTexture(gl::Context& context,
 OffscreenTexture::OffscreenTexture(gl::Context& context,
                                    const Size size,
                                    gl::Renderbuffer<gl::RenderbufferType::DepthComponent>& renderbuffer,
-                                   const gl::TextureType type)
+                                   const gfx::TextureChannelDataType type)
     : impl(std::make_unique<Impl>(context, std::move(size), renderbuffer, type)) {
     assert(!size.isEmpty());
 }
diff --git a/src/mbgl/util/offscreen_texture.hpp b/src/mbgl/util/offscreen_texture.hpp
index c2aca9bacd..5dc1ad0c56 100644
--- a/src/mbgl/util/offscreen_texture.hpp
+++ b/src/mbgl/util/offscreen_texture.hpp
@@ -15,11 +15,11 @@ class OffscreenTexture {
 public:
     OffscreenTexture(gl::Context&,
                      Size size = { 256, 256 },
-                     gl::TextureType type = gl::TextureType::UnsignedByte);
+                     gfx::TextureChannelDataType type = gfx::TextureChannelDataType::UnsignedByte);
     OffscreenTexture(gl::Context&,
                      Size size,
                      gl::Renderbuffer<gl::RenderbufferType::DepthComponent>&,
-                     gl::TextureType type = gl::TextureType::UnsignedByte);
+                     gfx::TextureChannelDataType type = gfx::TextureChannelDataType::UnsignedByte);
     ~OffscreenTexture();
     OffscreenTexture(OffscreenTexture&&);
     OffscreenTexture& operator=(OffscreenTexture&&);