glium 0.36.0

Elegant and safe OpenGL wrapper. Glium is an intermediate layer between OpenGL and your application. You still need to manually handle the graphics pipeline, but without having to use OpenGL's old and error-prone API. Its objectives: - Be safe to use. Many aspects of OpenGL that can trigger a crash if misused are automatically handled by glium. - Provide an API that enforces good pratices such as RAII or stateless function calls. - Be compatible with all OpenGL versions that support shaders, providing unified API when things diverge. - Avoid all OpenGL errors beforehand. - Produce optimized OpenGL function calls, and allow the user to easily use modern OpenGL techniques.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

use std::{error::Error, fmt};

use crate::{gl, image_format::FormatNotSupportedError, memory_object::MemoryObjectCreationError};

/// Describes a tiling mode used in texture storage by an external API
pub enum ExternalTilingMode {
    /// Corresponds to VK_IMAGE_TILING_OPTIMAL
    Optimal,
    /// Corresponds to VK_IMAGE_TILING_LINEAR
    Linear
}

impl Into<crate::gl::types::GLenum> for ExternalTilingMode {
    fn into(self) -> crate::gl::types::GLenum {
        match self {
            ExternalTilingMode::Optimal => gl::OPTIMAL_TILING_EXT,
            ExternalTilingMode::Linear => gl::LINEAR_TILING_EXT,
        }
    }
}

/// Contains parameters needed to import a texture created in an external
/// API into OpenGL. Must match with parameters used by external memory.
pub struct ImportParameters {
    /// Describes whether this memory was created as "dedicated" by the external API.
    pub dedicated_memory: bool,
    /// Size of the memory object in bytes.
    pub size: u64,
    /// Offset of the memory object in bytes.
    pub offset: u64,
    /// Tiling mode used in the memory object.
    pub tiling: ExternalTilingMode,
}


/// Error that can happen when importing a texture.
#[derive(Debug, Clone, Copy)]
pub enum TextureImportError {
    /// A specific format for the texture was not given.
    FormatNotPresent,
    /// An error ocurred during memory object creation
    MemoryObjectCreation(MemoryObjectCreationError),
    /// Texture format not supported by this OpenGL context
    FormatNotSupported(FormatNotSupportedError),
}

impl fmt::Display for TextureImportError {
    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
        use self::TextureImportError::*;
        match *self {
            FormatNotPresent => write!(fmt, "A specific format for the texture was not given."),
            MemoryObjectCreation(e) => e.fmt(fmt),
            FormatNotSupported(e) => e.fmt(fmt),
        }
    }
}

impl From<MemoryObjectCreationError> for TextureImportError {
    fn from(e: MemoryObjectCreationError) -> Self {
        Self::MemoryObjectCreation(e)
    }
}

impl Error for TextureImportError {}