diff options
Diffstat (limited to 'components/canvas/webgl_limits.rs')
| -rw-r--r-- | components/canvas/webgl_limits.rs | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/components/canvas/webgl_limits.rs b/components/canvas/webgl_limits.rs deleted file mode 100644 index f683b6efff6..00000000000 --- a/components/canvas/webgl_limits.rs +++ /dev/null @@ -1,259 +0,0 @@ -/* This Source Code Form is subject to the terms of the Mozilla Public - * License, v. 2.0. If a copy of the MPL was not distributed with this - * file, You can obtain one at https://mozilla.org/MPL/2.0/. */ - -use canvas_traits::webgl::{GLLimits, WebGLVersion}; -use glow::{self as gl, Context as Gl, HasContext}; -type GLenum = u32; - -pub trait GLLimitsDetect { - fn detect(gl: &Gl, webgl_version: WebGLVersion) -> Self; -} - -impl GLLimitsDetect for GLLimits { - fn detect(gl: &Gl, webgl_version: WebGLVersion) -> GLLimits { - let max_vertex_attribs = gl.get_integer(gl::MAX_VERTEX_ATTRIBS); - let max_tex_size = gl.get_integer(gl::MAX_TEXTURE_SIZE); - let max_cube_map_tex_size = gl.get_integer(gl::MAX_CUBE_MAP_TEXTURE_SIZE); - let max_combined_texture_image_units = gl.get_integer(gl::MAX_COMBINED_TEXTURE_IMAGE_UNITS); - let max_renderbuffer_size = gl.get_integer(gl::MAX_RENDERBUFFER_SIZE); - let max_texture_image_units = gl.get_integer(gl::MAX_TEXTURE_IMAGE_UNITS); - let max_vertex_texture_image_units = gl.get_integer(gl::MAX_VERTEX_TEXTURE_IMAGE_UNITS); - - // TODO: better value for this? - let max_client_wait_timeout_webgl = std::time::Duration::new(1, 0); - - // Based on: - // https://searchfox.org/mozilla-central/rev/5a744713370ec47969595e369fd5125f123e6d24/dom/canvas/WebGLContextValidate.cpp#523-558 - let ( - max_fragment_uniform_vectors, - max_varying_vectors, - max_vertex_uniform_vectors, - max_vertex_output_vectors, - max_fragment_input_vectors, - ); - if gl.version().is_embedded { - max_fragment_uniform_vectors = gl.get_integer(gl::MAX_FRAGMENT_UNIFORM_VECTORS); - max_varying_vectors = gl.get_integer(gl::MAX_VARYING_VECTORS); - max_vertex_uniform_vectors = gl.get_integer(gl::MAX_VERTEX_UNIFORM_VECTORS); - max_vertex_output_vectors = gl - .try_get_integer(gl::MAX_VERTEX_OUTPUT_COMPONENTS) - .map(|c| c / 4) - .unwrap_or(max_varying_vectors); - max_fragment_input_vectors = gl - .try_get_integer(gl::MAX_FRAGMENT_INPUT_COMPONENTS) - .map(|c| c / 4) - .unwrap_or(max_vertex_output_vectors); - } else { - max_fragment_uniform_vectors = gl.get_integer(gl::MAX_FRAGMENT_UNIFORM_COMPONENTS) / 4; - max_vertex_uniform_vectors = gl.get_integer(gl::MAX_VERTEX_UNIFORM_COMPONENTS) / 4; - - max_fragment_input_vectors = gl - .try_get_integer(gl::MAX_FRAGMENT_INPUT_COMPONENTS) - .or_else(|| gl.try_get_integer(gl::MAX_VARYING_COMPONENTS)) - .map(|c| c / 4) - .unwrap_or_else(|| gl.get_integer(gl::MAX_VARYING_VECTORS)); - max_vertex_output_vectors = gl - .try_get_integer(gl::MAX_VERTEX_OUTPUT_COMPONENTS) - .map(|c| c / 4) - .unwrap_or(max_fragment_input_vectors); - max_varying_vectors = max_vertex_output_vectors - .min(max_fragment_input_vectors) - .max(4); - }; - - let ( - max_uniform_block_size, - max_uniform_buffer_bindings, - min_program_texel_offset, - max_program_texel_offset, - max_transform_feedback_separate_attribs, - max_draw_buffers, - max_color_attachments, - max_combined_uniform_blocks, - max_combined_vertex_uniform_components, - max_combined_fragment_uniform_components, - max_vertex_uniform_blocks, - max_vertex_uniform_components, - max_fragment_uniform_blocks, - max_fragment_uniform_components, - max_3d_texture_size, - max_array_texture_layers, - uniform_buffer_offset_alignment, - max_element_index, - max_elements_indices, - max_elements_vertices, - max_fragment_input_components, - max_samples, - max_server_wait_timeout, - max_texture_lod_bias, - max_varying_components, - max_vertex_output_components, - ); - if webgl_version == WebGLVersion::WebGL2 { - max_uniform_block_size = gl.get_integer64(gl::MAX_UNIFORM_BLOCK_SIZE); - max_uniform_buffer_bindings = gl.get_integer(gl::MAX_UNIFORM_BUFFER_BINDINGS); - min_program_texel_offset = gl.get_signed_integer(gl::MIN_PROGRAM_TEXEL_OFFSET); - max_program_texel_offset = gl.get_integer(gl::MAX_PROGRAM_TEXEL_OFFSET); - max_transform_feedback_separate_attribs = - gl.get_integer(gl::MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS); - max_color_attachments = gl.get_integer(gl::MAX_COLOR_ATTACHMENTS); - max_draw_buffers = gl - .get_integer(gl::MAX_DRAW_BUFFERS) - .min(max_color_attachments); - max_combined_uniform_blocks = gl.get_integer(gl::MAX_COMBINED_UNIFORM_BLOCKS); - max_combined_vertex_uniform_components = - gl.get_integer64(gl::MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS); - max_combined_fragment_uniform_components = - gl.get_integer64(gl::MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS); - max_vertex_uniform_blocks = gl.get_integer(gl::MAX_VERTEX_UNIFORM_BLOCKS); - max_vertex_uniform_components = gl.get_integer(gl::MAX_VERTEX_UNIFORM_COMPONENTS); - max_fragment_uniform_blocks = gl.get_integer(gl::MAX_FRAGMENT_UNIFORM_BLOCKS); - max_fragment_uniform_components = gl.get_integer(gl::MAX_FRAGMENT_UNIFORM_COMPONENTS); - uniform_buffer_offset_alignment = gl.get_integer(gl::UNIFORM_BUFFER_OFFSET_ALIGNMENT); - max_3d_texture_size = gl.get_integer(gl::MAX_3D_TEXTURE_SIZE); - max_array_texture_layers = gl.get_integer(gl::MAX_ARRAY_TEXTURE_LAYERS); - max_element_index = gl - .try_get_integer64(gl::MAX_ELEMENT_INDEX) - .unwrap_or(u32::MAX as u64); // requires GL 4.3 - max_elements_indices = gl.get_integer(gl::MAX_ELEMENTS_INDICES); - max_elements_vertices = gl.get_integer(gl::MAX_ELEMENTS_VERTICES); - max_fragment_input_components = gl.get_integer(gl::MAX_FRAGMENT_INPUT_COMPONENTS); - max_samples = gl.get_integer(gl::MAX_SAMPLES); - max_server_wait_timeout = - std::time::Duration::from_nanos(gl.get_integer64(gl::MAX_SERVER_WAIT_TIMEOUT)); - max_texture_lod_bias = gl.get_float(gl::MAX_TEXTURE_LOD_BIAS); - max_varying_components = gl.try_get_integer(gl::MAX_VARYING_COMPONENTS).unwrap_or( - // macOS Core Profile is buggy. The spec says this value is 4 * MAX_VARYING_VECTORS. - max_varying_vectors * 4, - ); - max_vertex_output_components = gl.get_integer(gl::MAX_VERTEX_OUTPUT_COMPONENTS); - } else { - max_uniform_block_size = 0; - max_uniform_buffer_bindings = 0; - min_program_texel_offset = 0; - max_program_texel_offset = 0; - max_transform_feedback_separate_attribs = 0; - max_color_attachments = 1; - max_draw_buffers = 1; - max_combined_uniform_blocks = 0; - max_combined_vertex_uniform_components = 0; - max_combined_fragment_uniform_components = 0; - max_vertex_uniform_blocks = 0; - max_vertex_uniform_components = 0; - max_fragment_uniform_blocks = 0; - max_fragment_uniform_components = 0; - uniform_buffer_offset_alignment = 0; - max_3d_texture_size = 0; - max_array_texture_layers = 0; - max_element_index = 0; - max_elements_indices = 0; - max_elements_vertices = 0; - max_fragment_input_components = 0; - max_samples = 0; - max_server_wait_timeout = std::time::Duration::default(); - max_texture_lod_bias = 0.0; - max_varying_components = 0; - max_vertex_output_components = 0; - } - - GLLimits { - max_vertex_attribs, - max_tex_size, - max_cube_map_tex_size, - max_combined_texture_image_units, - max_fragment_uniform_vectors, - max_renderbuffer_size, - max_texture_image_units, - max_varying_vectors, - max_vertex_texture_image_units, - max_vertex_uniform_vectors, - max_client_wait_timeout_webgl, - max_transform_feedback_separate_attribs, - max_vertex_output_vectors, - max_fragment_input_vectors, - max_uniform_buffer_bindings, - min_program_texel_offset, - max_program_texel_offset, - max_color_attachments, - max_draw_buffers, - max_uniform_block_size, - max_combined_uniform_blocks, - max_combined_vertex_uniform_components, - max_combined_fragment_uniform_components, - max_vertex_uniform_blocks, - max_vertex_uniform_components, - max_fragment_uniform_blocks, - max_fragment_uniform_components, - max_3d_texture_size, - max_array_texture_layers, - uniform_buffer_offset_alignment, - max_element_index, - max_elements_indices, - max_elements_vertices, - max_fragment_input_components, - max_samples, - max_server_wait_timeout, - max_texture_lod_bias, - max_varying_components, - max_vertex_output_components, - } - } -} - -trait GLExt { - fn try_get_integer(self, parameter: GLenum) -> Option<u32>; - fn try_get_integer64(self, parameter: GLenum) -> Option<u64>; - fn try_get_signed_integer(self, parameter: GLenum) -> Option<i32>; - fn try_get_float(self, parameter: GLenum) -> Option<f32>; - fn get_integer(self, parameter: GLenum) -> u32; - fn get_integer64(self, parameter: GLenum) -> u64; - fn get_signed_integer(self, parameter: GLenum) -> i32; - fn get_float(self, parameter: GLenum) -> f32; -} - -macro_rules! create_fun { - ($tryer:ident, $getter:ident, $gltype:ty, $glcall:ident, $rstype:ty) => { - #[allow(unsafe_code)] - fn $tryer(self, parameter: GLenum) -> Option<$rstype> { - let mut value = [<$gltype>::default()]; - unsafe { - self.$glcall(parameter, &mut value); - } - if unsafe { self.get_error() } != gl::NO_ERROR { - None - } else { - Some(value[0] as $rstype) - } - } - - fn $getter(self, parameter: GLenum) -> $rstype { - self.$tryer(parameter).unwrap() - } - }; -} - -impl GLExt for &Gl { - create_fun!( - try_get_integer, - get_integer, - i32, - get_parameter_i32_slice, - u32 - ); - create_fun!( - try_get_integer64, - get_integer64, - i64, - get_parameter_i64_slice, - u64 - ); - create_fun!( - try_get_signed_integer, - get_signed_integer, - i32, - get_parameter_i32_slice, - i32 - ); - create_fun!(try_get_float, get_float, f32, get_parameter_f32_slice, f32); -} |