CHANGELOG.md

Changelog

Version 0.32.1 (2022-07-31)

• Bugfix release to not panic when given multiple vertex attributes with unspecified location numbers.

Version 0.32.0 (2022-07-30)

• Updated glutin to version 0.29.0. See the glutin release notes here.
• Support for location binding for Vertex attributes.

Version 0.31 (2021-12-11)

• Updated glutin to version 0.28.0. See the glutin release notes here.
• Use mdbook for the book.

Version 0.30.2 (2021-09-06)

• Added depth and stencil buffer blitting.
• Added dual source blending.
• Implemented AsUniformValue for Texture2d directly.

Version 0.30.1 (2021-07-12)

• Added ClientFormat::U1U5U5U5Reversed.
• Updated ouroboros to 0.10.

Version 0.30.0 (2021-06-23)

• Updated glutin to version 0.27.0. See the glutin release notes here.
• Replaced unmaintained rental with ouroboros.
• Allow instancing on GLES3 or later.
• Support for importing and using Vulkan semaphores.
• Made Content::read an unsafe API.
• Modernized and fixed the third chapter of the tutorial.

Version 0.29.1 (2021-04-22)

• Updated rand to 0.8.
• Updated cgmath to 0.18.
• Made UniformsStorage implement Copy and Clone.
• Use $crate::uniform! internally.
• Implemented From instead of Into for some conversions.

Version 0.29.0 (2020-12-15)

• Updated glutin to version 0.26.0. See the glutin release notes here.
• Updated memoffset to 0.6.
• Added support for glPolygonOffset.
• Added support for loading SPIR-V shaders.
• Switched to edition 2018.
• Switched from Travis CI to Github Actions

Version 0.28.0 (2020-10-03)

• Updated glutin to version 0.25.0. See the glutin release notes here.
• Implemented atomic counters.
• Added CubeMapArrays support.

Version 0.27.0 (2020-03-26)

• Updated glutin to version 0.24.0. See the glutin release notes here.

Version 0.26.0 (2020-02-09)

• Updated glutin to version 0.23.0. See the glutin release notes here.
• Removal of some unsound code that rustc warns about
• Report the precise shader stage in which a shader failed compilation

Version 0.25.1 (2019-07-08)

• Silenced deprecation warning when invoking implement_vertex.

Version 0.25.0 (2019-05-24)

• Updated glutin to version 0.21.

Version 0.24.0 (2019-04-08)

• Updated glutin to version 0.20. See the glutin release notes here.
• Depth comparison and shadow mapping (#1679).

Version 0.23.0 (2018-12-05)

• Updated glutin to version 0.19. See the glutin release notes here.

Version 0.22.0 (2018-07-02)

• Updated glutin to version 0.17.
• Updated glutin to version 0.16. Added 'icon_loading' feature.

Version 0.21.0 (2018-04-11)

• Updated glutin to version 0.14. Fixes handling of HiDPI on macOS.
• Updated gl_generator to version 0.9.

Version 0.20.0 (2018-01-22)

• Updated glutin to version 0.12.
• Updated smallvec from version 0.4 to 0.6.
• Updated misc internal dependencies and dev-dependencies (lazy_static, cgmath, rand, image, gl_generator).
• Replaced the IntoVerticesSource trait with Into<VerticesSource>.
• Fixed rendering bug on high-DPI screens.
• Added support for clipping via gl_ClipDistance.
• Enabled depth-stencil FBO attachments.

Version 0.19.0 (2017-12-11)

• Updated glutin to version 0.11. Notably includes the winit 0.9 update.
• Updated gl_generator to 0.7 (internal dependency).

Version 0.18.1 (2017-11-05)

• Fixed links pointing to tomaka/glium instead of glium/glium
• Various documentation updates, bugfixes, and dependency updates.

Version 0.18.0 (2017-10-15)

• Updated glutin to version 0.10.
• Added support for is_buffer_supported usage on all buffer types.
• Various documentation updates and bugfixes.

Version 0.17.1 (2017-08-27)

• Changed documentation to docs.rs.
• Various bugfixes and updates to internal dependencies.

Version 0.17.0 (2017-07-12)

• Updated glutin to version 0.9.
• Redesigned API around EventsLoop to match updated winit design.
• Added support for vector normalization.
• Various bugfixes.

Version 0.16.0 (2017-01-07)

• Added asynchronous screenshot example.
• Updated tutorials to compile on Mac OS X.
• Various tutorial documentation updates.
• Fix buffer reads which could fail being safe.
• Various bugfixes.

Version 0.15.0 (2016-07-03)

• Updated glutin to version 0.6.1
• Various internal dependency updates.

Version 0.14.0 (2016-04-11)

• Updated glutin to version 0.5.
• Various bugfixes.

Version 0.13.5 (2016-02-04)

• Fixed integer textures using a forbidden filtering by default.
• Better error report in case of a uniform block layout mismatch.

Version 0.13.4 (2016-01-21)

• Added support for shader subroutines.
• Added various functions to Context to retrieve information (like the content of GL_VENDOR or GL_RENDERER for example).
• Added additional dimensions getters to the various texture types.

Version 0.13.3 (2016-01-08)

• Added constructors to SimpleFrameBuffer for depth-only, depth-stencil-only, stencil-only and depth & stencil framebuffers.

Version 0.13.2 (2015-12-21)

• Fixed compilation on ARM platform.
• Added a hack to make screenshots and video taken with the FRAPS software work.

Version 0.13.1 (2015-12-15)

• raw_read_to_pixel_buffer now accepts all pixel types.

Version 0.13.0 (2015-12-12)

• Removed native support for cgmath and nalgebra in avoid to avoid dependency hell.
• Reworked the layer-related, level-related functions and into_image from texture types where they are not relevant.
• The Backend::get_proc_address function now takes a *const std::os::raw::c_void instead of a *const ().

Version 0.12.4 (2015-12-12)

• Added small hack to make glium work with WebGL.
• Fixed blend color state not being always updated.

Version 0.12.3 (2015-12-04)

• Added raw_clear_buffer to TextureAnyImage, which allows you to clear the content of any texture.
• Added TextureAny::from_id to manipulate an unowned texture.

Version 0.12.2 (2015-11-25)

• Fixed a bug when matching frag output locations with framebuffer attachments.

Version 0.12.1 (2015-11-25)

• Added MultiOutputFrameBuffer::with_stencil, with_depth_stencil and with_depth_and_stencil.
• Implemented the ToColorAttachment trait for unsigned and integral textures.
• Implemented the ToXAttachment traits for the XAttachment types.
• It is now possible to use another format than (u8, u8, u8, u8) with raw_read on a texture.

Version 0.12.0 (2015-11-21)

• Removed the "image" feature and native support for the image. You now have to perform conversions yourself.
• The Backend::get_proc_address function now takes a *const () instead of a *const libc::c_void.
• Creating a MultiOutputFrameBuffer now requires passing an iterator instead of a Vec.
• When checking a uniform block's layout, [f32; 4] now matches both vec4 and float[4] instead of just vec4 before. Same for all other arrays between 1 and 4 elements.
• UniformBlock is now implemented for [T; N] where N is between 5 and 32, plus 64, 128, 256, 512, 1024 and 2048.
• When checking a uniform block's layout, arrays (sized and unsized) now match structs with a single member that is an array.

Version 0.11.1 (2015-11-10)

• Fix broken compilation after libc 0.2.

Version 0.11.0 (2015-11-04)

• Updated the versions of glutin, image and cgmath.
• Improved performance of stencil-related state changes.
• Fixed glBufferData being called to invalidate a buffer created with glBufferStorage.
• Changed use of Range in buffer slice to RangeArgument.

Version 0.10.0 (2015-10-14)

• Update glutin to 0.4, cgmath to 0.3 and nalgebra to 0.3.
• Add the possibility to set the behavior of the debug callback in Context::new.
• Add build_glium_debug and build_glium_unchecked_debug to set the behavior of the debug callback at initialization.
• Rename ClockWise to Clockwise.
• The program! macro now returns a ProgramChooserCreationError and no longer panics if no version is found.
• Remove the Texture trait. All of its methods are already implemented on all texture types already.
• Rename UniformBlock::binding to id and add initial_binding.

Version 0.9.3 (2015-10-13)

• Fixed an invalid enum error during initialization.

Version 0.9.2 (2015-10-11)

• Add is_color_renderable to the color image formats.
• Fixed glium erroneously using a SSBO's and a uniform buffer's binding point instead of index.
• Fixed glInvalidateBuffer(Sub)Data being called for persistent-mapped buffers.

Version 0.9.1 (2015-09-30)

• Add ComputeShader::execute_indirect.
• Add support for 64bits integer uniforms.
• copy_to now takes a Into<BufferSlice> instead of a BufferSlice.
• Glium no longer calls glBlendColor if the blending algorithm doesn't use it.
• Deprecated DrawParameters::validate.

Version 0.9.0 (2015-09-15)

• The blending, depth and stencil functions now use dedicated structs named Blend, Depth and Stencil.
• SimpleFrameBuffer and MultiOutputFrameBuffer's constructors now return a Result.
• Creating a renderbuffer now returns a Result.
• Add support for empty framebuffers with the EmptyFrameBuffer type.
• Fix an OpenGL error when mapping a buffer with map_read.
• Glium no longer panics in case of OpenGL error. It prints a message with backtrace on stdout instead.
• Removed the DrawParametersBuilder struct.
• Add clear_color_srgb and derivates. The clear method has an additional color_srgb: bool parameter.
• Added some state changes when swapping buffers to adapt to the FRAPS software.
• Removed StencilTexture3d are they are not supported by OpenGL.

Version 0.8.7 (2015-08-27)

• Fix a panic when creating a stencil renderbuffer or texture.
• Add support for f64 uniforms.

Version 0.8.6 (2015-08-26)

• Renamed BufferView to Buffer. BufferView still exists for backward compatibility.
• Add a copy_to method to buffers.
• Add support for the GL_OES_element_index_uint extension.
• Fixed OpenGL ES 3.2 not working.
• Add support for IntVec{2|3|4} and UnsignedIntVec{2|3|4} uniform types.
• Add a work-around for Radeon drivers crashing with 32+ texture units.
• Add support for boolean uniforms.
• Add support for BoolVec{2|3|4} uniform types.

Version 0.8.5 (2015-08-12)

• Added support for cubemaps and cubemap arrays. Not all operations are available yet.
• DrawParameters no longer implements Copy.
• Add support for OpenGL ES 3.2 for geometry shaders, tessellation shaders, robustness, debug output, buffer textures, stencil textures, base vertex.
• Add support for GL_OES_geometry_shader, GL_OES_tessellation_shader GL_OES_draw_elements_base_vertex, GL_OES_draw_elements_base_vertex.
• Add support for specifying the primitive bounding box as an optimization hint to the backend.
• Added various is_texture_*_supported functions in the texture module to check whether a texture type is supported.

Version 0.8.4 (2015-08-10)

• Added #[inline] attributes on many functions.
• Added slice_custom and slice_custom_mut to buffers, which allow you to get slices over anything inside the buffer.
• Added Query::to_buffer_u32 to write the result of a query to a buffer.
• Added is_supported functions for all the texture and renderbuffer formats.
• Added missing I16I16I16I16 and U16U16U16 float formats. Renamed U3U32Uto U3U3U2.
• Various fixes and improvements when determining whether a format is supported.
• Changed the framebuffer::To*Attachment traits with a lifetime parameter, and to take by value instead of by reference.
• The framebuffer::To*Attachment traits are now implemented on TextureLayerMipmap structs.
• Fixed .layer() function returning None when it shouldn't.
• GLSL ES 3.2 is now recognized.

Version 0.8.3 (2015-08-04)

• Textures are now inside submodules (for example Texture2d is in texture::texture2d::Texture2d) and reexported from texture.
• Added Context::flush() and Context::finish(). Deprecated Context::synchronize.
• Removed Sized constraint for Surface that was preventing one from using &Surface or &mut Surface.
• Added TextureAnyMipmap::raw_upload_from_pixel_buffer.
• Moved the pixel_buffer module to texture::pixel_buffer (the old module still exists for backward compatibility).

Version 0.8.2 (2015-07-29)

• Added a buffer_texture module in texture.
• Added DrawParameters::depth_clamp and DrawError::DepthClampNotSupported.

Version 0.8.1 (2015-07-27)

• Added DrawParameters::ProvokingVertex and DrawError::ProvokingVertexNotSupported.
• Added DrawError::RasterizerDiscardNotSupported.
• DrawParametersBuilder is now deprecated.
• ProgramCreationInput now has a outputs_srgb member.
• Fixed a bug with offsets of members in arrays.
• Added support for the GL_EXT_geometry_shader OpenGL ES extension.

Version 0.8.0 (2015-07-19)

• Removed all Cargo features related to OpenGL compatibility.
• Replaced all new_if_supported or empty_if_supported functions with new or empty and a proper error type.
• All new and empty constructors now return an error if the operation is not supported.
• VertexBuffer and IndexBuffer constructors now take a &[T].
• Updated glutin to version 0.3.
• BufferView's constructors now take a BufferMode.
• Replaced read and read_if_supported with read that returns a ReadError.
• Added buffer::is_buffer_read_supported.
• Removed the deprecated new_empty function from textures.
• Reworked TextureCreationError and removed TextureMaybeSupportedCreationError.
• new and dynamic are now less specialized, which should fix some performance bottlenecks.
• All buffer constructors now come in four variants: new, dynamic, persistent, immutable.
• Add support for all missing vertex attributes.
• Fixed stencil operations sometimes not working.

Version 0.7.1 (2015-07-14)

• Glium now automatically calls glDraw*BaseVertex if it is supported.
• Added the CapabilitiesSource trait implemented automatically on all types that implement Facade.
• Added is_supported to IndexType, Index, PrimitiveType, Attribute and AttributeType.
• Added ComputeShader::is_supported, program::is_geometry_shader_supported and program::is_tessellation_shader_supported.
• The implement_buffer_content! and implement_block_layout! macros can now take a struct with a lifetime parameter by passing Foo<'a> instead of Foo.

Version 0.7.0 (2015-07-08)

• Buffers now contain a single, possibly unsized, element. BufferView<T> is now BufferView<[T]>.
• Creating an empty BufferView<[T]> now requires calling empty_array instead of empty.
• BufferView::write now takes a &T instead of a P where P: AsRef<[T]>. This means that you can no longer pass Vecs by value for example.
• Removed the mock methods from UniformBuffer as they are available through the Deref to BufferView.
• The UniformBlock trait is now implemented on DrawCommandNoIndices and DrawCommandIndices.
• Added the implement_buffer_content! macro to put on unsized struct so that you can put them inside buffers.
• Added a uniforms::LayoutMismatchError as an additional field to DrawError::UniformBlockLayoutMismatch.
• Changed UniformBlock::matches to return a Result<(), UniformBlockLayoutMismatch>.
• Removed the matches function from the AsUniformValue trait.
• Removed TextureSurface in favor of SimpleFrameBuffer.

Version 0.6.7 (2015-07-06)

• Added DrawCommandsIndicesBuffer for multidraw elements indirect.
• Added ResidentTexture, TextureHandle and Texture::resident_if_supported() for bindless textures.
• Buffers no longer require their content to be Send or 'static (except for types with the Any suffix).
• Renamed texture::TextureType to Dimensions.
• Added Context::get_opengl_version() and deprecated get_version().

Version 0.6.6 (2015-07-03)

• Buffers with persistent mapping now synchronize individual segments of the buffer instead of the buffer as a whole.
• Dynamic sized arrays are now properly handled by the introspection system.
• Added support for matrix shader attributes.
• Fixed the value of depth_write being ignored if depth_test was Overwrite.

Version 0.6.5 (2015-06-29)

• Renamed and changed UniformBlockMember to BlockLayout.
• Added map_read() and map_write() to buffers.
• Various bugfixes related to queries.
• Added a implement_uniform_block! macro for uniform buffers and SSBOs similar to implement_vertex!.
• Added UniformBuffer::empty and UniformBuffer::empty_if_supported.
• Fixed sRGB being disabled when clearing before drawing for the first time.

Version 0.6.4

• Fixed an OpenGL error if GL_ARB_robustness was present with OpenGL < 3.0.
• Now using the GL_APPLE_SYNC extension if OpenGL ES 3.0 is not available.
• Now using the GL_EXT_buffer_storage extension on OpenGL ES if it is available.
• Slightly improved performances when using a dynamic buffer.
• Added GL_PROGRAM_POINT_SIZE support to Program.

Version 0.6.3

• Fixed the OpenGL compatibility check for SSBO reflection.
• Fixed a potential OpenGL error if uniform buffer objects are not supported.
• Fixed a potential OpenGL error if transform feedback buffers are not supported.

Version 0.6.2

• Added is_context_lost, is_robust and is_context_loss_possible methods to Context (callable through the Display as well).
• Fixed using a framebuffer with a depth or stencil attachment causing the wrong texture to be displayed.

Version 0.6.1

• Fixed mipmaps generation with sRGB textures.

Version 0.6.0

• Frame::finish now returns a Result. Frame's destructor will panic if finish has not been called.
• with_compressed_data and with_compressed_data_if_supported now have an additional parameter for mipmaps.
• All the texture constructors that used to take a boolean as parameter for mipmaps now takes an enum.
• empty_with_format and empty_with_format_if_supported are now allowed for compressed textures.
• write, write_compressed_data, write_compressed_data_if_supported and read_compressed_data are now available for mipmap objects.
• Removed the is_closed() function.
• Removed the deprecated render_buffer module.
• The Backend::swap_buffers function must now return a Result.

Version 0.5.6

• The panic at initialization in case of OpenGL error has been replaced by a warning.

Version 0.5.5

• Added with_compressed_data, read_compressed_data and write_compressed_data to compressed texture types.
• Fixed a panic at initialization on OS/X.

Version 0.5.4

• Added the LineLoop primitive type.
• Added the smooth draw parameters.
• Fixed a potential GL_INVALID_ENUM error generated at initialization.
• Glium will now panic if an OpenGL error is triggered during initialization.
• Fixed gamma correction with OpenGL ES.
• Fixed get_internal_format_if_supported() sometimes panicking.
• Fixed a panic with a tessellation evaluation shader that outputs quads.

Version 0.5.3

• Added support for compute shaders with the program::ComputeShader struct.
• Can now bind a uniform buffer as a shader storage buffer.
• Added Program::get_shader_storage_blocks() to obtain the list of shader storage blocks.
• The Attribute trait is now implemented on types from cgmath.
• Now caching the actual format of a texture in case it is retrieved multiple times.

Version 0.5.2

• Added vertex::TransformFeedbackSession and transform_feedback to the draw parameters.
• Added RenderBufferAny. Render buffers now deref to RenderBufferAny.
• Deprecated .into_vertex_buffer_any() in favor of .into().
• Added .get_total_bits() to texture::InternalFormat.
• Fixed values in uniform blocks being required to implement the Default trait.
• Fixed buffer sometimes not always correctly unbound.

Version 0.5.1 (2015-05-30)

• Added index::DrawCommandsNoIndicesBuffer for multidraw indirect drawing.
• Fixed a potential panic when using a buffer.

Version 0.5.0 (2015-05-27)

• IndexBuffer now takes the type of indices as template parameter.
• IndexBuffer now derefs to BufferView. Allows modifying the index buffer after it has been created.
• Added IndexBufferAny.
• Removed the ToIndicesSource and IntoIndexBuffer traits. The former is replaced with Into<IndicesSource>.
• PixelBuffer now takes the type of pixels as template parameter.
• Renamed PixelBuffer::read to PixelBuffer::read_as_texture_2d.
• PixelBuffer now derefs to BufferView.
• Added BufferView::read_as_texture_1d and BufferView::read_as_texture_1d_if_supported.
• Reworked TextureDataSink traits to take a precise format.
• Fixed a panic when destroying a buffer with persistent mapping.
• Removed deprecated function VertexBuffer::new_dynamic.
• It is now safe to call mem::forget on a Mapping object.

Version 0.4.2 (2015-05-25)

• Removed the buffer::Builder type as it was proven unsound.
• Renamed SubBuffer to BufferView.
• Display/GlutinFacade now derefs to Context.
• Mapping a buffer now simply calls glMapBuffer again, instead of writing to a temporary buffer.
• glutin is now an optional dependency (enabled by default).
• Creating an index buffer now correctly uses a GL_ELEMENT_ARRAY_BUFFER.

Version 0.4.1 (2015-05-22)

• Added a buffer::Builder type to build multiple sub-buffers within the same buffer.
• Added an invalidate method to buffers.
• Updated glutin to 0.1.6.

Version 0.4.0 (2015-05-17)

• Removed support for using indices in RAM.
• IndexBuffer, VertexBuffer and UniformBuffer now deref to SubBuffer/SubBufferAny.
• Added a get_internal_format_if_supported method to textures.
• Replaced the IntoProgramCreationInput trait with Into<ProgramCreationInput>.
• The VertexFormat type is now a Cow<'static, []> instead of a Vec.
• Updated cgmath dependency to version 0.2.

Version 0.3.7 (2015-05-12)

• Added AnySamplesPassedQuery, PrimitivesGeneratedQuery and TransformFeedbackPrimitivesWrittenQuery, and corresponding fields in DrawParameters.
• The samples_passed_query draw parameter can now also take a AnySamplesPassedQuery.
• Added a condition parameter to the draw parameters, allowing you to use conditional rendering.
• Textures now have a sampled() method to make it easier to create a Sampler.
• Added a color_mask member to the draw parameters.
• Added per_instance and per_instance_if_supported to VertexBufferAny.

Version 0.3.6 (2015-05-09)

• Added SamplesPassedQuery and TimeElapsedQuery types. They can be passed to the draw parameters.
• Buffers are no longer mapped with GL_MAP_COHERENT_BIT. Flushing is handled by glium.
• Changed Surface::clear to take an additional optional Rect parameter that specifies the rectangle to clear.
• Fixed the program! macro not usable with version numbers >= 256.
• Added support for GL_OES_depth_texture and GL_OES_packed_depth_stencil.
• Moved the content of the render_buffer module to framebuffer. render_buffer still exists but is deprecated.

Version 0.3.5 (2015-05-02)

• Glium now reexports glutin. You can access glutin with glium::glutin.
• Fixed trying to retrieve uniform blocks on OpenGL ES 2.

Version 0.3.4 (2015-04-28)

• Added caching some uniform values in the Program struct to avoid calls to glUniform.
• VertexBuffer::dynamic and write can now take a &[T] as well as a Vec<T>.
• assert_no_error now takes an optional user-defined string.
• Fixed triggering an OpenGL error on initialization with non-compatibility contexts.
• Added a better texture units assignment system when drawing, in order to avoid some redundant state changes.

Version 0.3.3 (2015-04-24)

• Removed the gl_persistent_mapping feature.
• Creating a dynamic buffer now creates a persistent mapped buffer automatically if supported.
• Creating a non-dynamic buffer now creates an immutable buffer. Modifying such a buffer is still possible but very expensive.
• Deprecated the new_dynamic function in favor of dynamic.
• Fixed zero-sized textures triggering OpenGL errors.
• Added the possibility to add a debug string in the OpenGL commands queue.

Version 0.3.2 (2015-04-23)

• Added vertex::EmptyVertexAttributes and vertex::EmptyInstanceAttributes markers in order to draw without a vertex source.
• Added more formats in CompressedFormats and CompressedSrgbFormats.
• Fixed the Mapping objects not implementing Sync.
• Fixed rendering to an sRGB texture not possible.
• GliumCreationError now has a template parameter indicating the backend creation error type.
• The DisplayBuild trait has a new associated type indicating the error type.
• Fixed the debug output callback not being disabled when compiling with --release.

Version 0.3.1 (2015-04-18)

• Fixed lifetime-related issues when using the uniform! macro.

Version 0.3.0 (2015-04-16)

• Changed the slice() functions to take a Range instead of two parameters.
• Added SrgbTexture and CompressedSrgbTexture types.
• Added SrgbFormat and CompressedSrgbFormat enums.
• GL_FRAMEBUFFER_SRGB is now enabled by default.

Version 0.2.3 (2015-04-14)

• Added a program! macro which builds a program. Glium chooses the right shaders depending on what the backend supports.
• Added a VertexBuffer::empty method that creates a vertex buffer with uninitialized data.
• Fixed drawing with offsets in vertex buffers different than 0 not permitted.
• Changed transform feedback reflection API to be compatible with what OpenGL 4.4 or ARB_enhanced_layouts allow.
• VertexBuffer::new can now take a slice as parameter.
• Revert the fix for sRGB. GL_FRAMEBUFFER_SRGB is no longer enabled.

Version 0.2.2 (2015-04-10)

• Added support for backends that don't have vertex array objects (like OpenGL ES 2/WebGL).
• Glium now has basic support for OpenGL ES 2/WebGL.
• Added stencil operations in DrawParameters.
• Fixed GL_FRAMEBUFFER_SRGB not being enabled, leading to different brightness depending on the target.
• Fixed trailing commas not working in implement_vertex! and uniform!.

Version 0.2.1 (2015-04-03)

• Creating a texture with a specific format now properly checks for available extensions.

Version 0.2.0 (2015-03-30)

• Removed PerInstanceAttributesBuffer and PerInstanceAttributesBufferAny.
• Added per_instance and per_instance_if_supported to VertexBuffer.
• Removed the deprecated index_buffer module. Use the index module instead.
• Fixed viewport dimensions on retina screens.
• The Backend trait is now marked unsafe.

Version 0.1.3 (2015-03-24) & 0.1.4 (2015-03-26)

• Added the Backend and Facade traits. Display implements the Facade trait.
• Changed all buffer/texture/etc. creation functions to take any type that implements Facade instead of a Display.
• Added GlutinWindowBackend and GlutinHeadlessBackend that implement the Backend trait.
• Changed the private Context struct to be public. This allows users to implement the Facade trait themselves.
• Added an associated type to the DisplayBuild trait.
• Fixed scissor boxing not being disabled before a blit.

Version 0.1.2 (2015-03-20)

• Fixed a memory leak with vertex array objects.
• Fixed an issue where you couldn't reuse the same uniform values created with uniform! multiple times.

Version 0.1.1 (2015-03-13)

• Added ToColorAttachment trait implementation for Texture2dMultisample.
• Added Texture2dMultisample::as_surface method.
• Updated the crate for the new I/O.
• Changed VertexFormat to take a Cow<'static, str> instead of a String.
• Fixed a stack overflow in release mode.
• Removed the fence argument from vertices, indices and uniforms sources. Fences are now directly gathered from buffers when drawing.