# Change Log
## 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 destrutor 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- The panic at initialization in case of OpenGL error has been replaced by a warning.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 retreived 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 unbinded.
## 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 retreive 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.