73 lines
2 KiB
Rust
73 lines
2 KiB
Rust
use gl::types::{GLenum, GLuint};
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use crate::error;
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use crate::error::FilterChainError;
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use librashader_reflect::back::cross::GlslVersion;
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pub unsafe fn gl_compile_shader(stage: GLenum, source: &str) -> error::Result<GLuint> {
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let shader = gl::CreateShader(stage);
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gl::ShaderSource(
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shader,
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1,
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&source.as_bytes().as_ptr().cast(),
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std::ptr::null(),
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);
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gl::CompileShader(shader);
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let mut compile_status = 0;
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gl::GetShaderiv(shader, gl::COMPILE_STATUS, &mut compile_status);
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if compile_status == 0 {
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Err(FilterChainError::GlCompileError)
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} else {
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Ok(shader)
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}
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}
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pub fn gl_get_version() -> GlslVersion {
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let mut maj_ver = 0;
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let mut min_ver = 0;
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unsafe {
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gl::GetIntegerv(gl::MAJOR_VERSION, &mut maj_ver);
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gl::GetIntegerv(gl::MINOR_VERSION, &mut min_ver);
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}
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match maj_ver {
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3 => match min_ver {
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3 => GlslVersion::V3_30,
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2 => GlslVersion::V1_50,
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1 => GlslVersion::V1_40,
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0 => GlslVersion::V1_30,
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_ => GlslVersion::V1_50,
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},
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4 => match min_ver {
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6 => GlslVersion::V4_60,
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5 => GlslVersion::V4_50,
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4 => GlslVersion::V4_40,
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3 => GlslVersion::V4_30,
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2 => GlslVersion::V4_20,
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1 => GlslVersion::V4_10,
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0 => GlslVersion::V4_00,
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_ => GlslVersion::V1_50,
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},
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_ => GlslVersion::V1_50,
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}
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}
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pub fn gl_u16_to_version(version: u16) -> GlslVersion {
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match version {
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0 => gl_get_version(),
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300 => GlslVersion::V1_30,
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310 => GlslVersion::V1_40,
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320 => GlslVersion::V1_50,
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330 => GlslVersion::V3_30,
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400 => GlslVersion::V4_00,
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410 => GlslVersion::V4_10,
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420 => GlslVersion::V4_20,
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430 => GlslVersion::V4_30,
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440 => GlslVersion::V4_40,
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450 => GlslVersion::V4_50,
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460 => GlslVersion::V4_60,
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_ => GlslVersion::V1_50,
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}
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}
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