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anvil: Introduce RenderTextureSpec to simplify render_texture

This commit is contained in:
Victor Berger 2020-05-02 12:47:10 +02:00 committed by Victor Berger
parent 64aedce01f
commit 35d8cea547
1 changed files with 37 additions and 35 deletions
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56
anvil/src/glium_drawer.rs
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@ -239,26 +239,16 @@ impl<F: GLGraphicsBackend + 'static> GliumDrawer<F> {
} }
} }
pub fn render_texture( pub fn render_texture(&self, target: &mut Frame, spec: RenderTextureSpec<'_>) {
&self, let xscale = 2.0 * (spec.surface_dimensions.0 as f32) / (spec.screen_size.0 as f32);
target: &mut Frame, let mut yscale = -2.0 * (spec.surface_dimensions.1 as f32) / (spec.screen_size.1 as f32);
texture: &Texture2d,
texture_kind: usize,
y_inverted: bool,
surface_dimensions: (u32, u32),
surface_location: (i32, i32),
screen_size: (u32, u32),
blending: glium::Blend,
) {
let xscale = 2.0 * (surface_dimensions.0 as f32) / (screen_size.0 as f32);
let mut yscale = -2.0 * (surface_dimensions.1 as f32) / (screen_size.1 as f32);
let x = 2.0 * (surface_location.0 as f32) / (screen_size.0 as f32) - 1.0; let x = 2.0 * (spec.surface_location.0 as f32) / (spec.screen_size.0 as f32) - 1.0;
let mut y = 1.0 - 2.0 * (surface_location.1 as f32) / (screen_size.1 as f32); let mut y = 1.0 - 2.0 * (spec.surface_location.1 as f32) / (spec.screen_size.1 as f32);
if y_inverted { if spec.y_inverted {
yscale = -yscale; yscale = -yscale;
y -= surface_dimensions.1 as f32; y -= spec.surface_dimensions.1 as f32;
} }
let uniforms = uniform! { let uniforms = uniform! {
@ -268,17 +258,17 @@ impl<F: GLGraphicsBackend + 'static> GliumDrawer<F> {
[ 0.0 , 0.0 , 1.0, 0.0], [ 0.0 , 0.0 , 1.0, 0.0],
[ x , y , 0.0, 1.0] [ x , y , 0.0, 1.0]
], ],
tex: texture, tex: spec.texture,
}; };
target target
.draw( .draw(
&self.vertex_buffer, &self.vertex_buffer,
&self.index_buffer, &self.index_buffer,
&self.programs[texture_kind], &self.programs[spec.texture_kind],
&uniforms, &uniforms,
&glium::DrawParameters { &glium::DrawParameters {
blend: blending, blend: spec.blending,
..Default::default() ..Default::default()
}, },
) )
@ -291,6 +281,16 @@ impl<F: GLGraphicsBackend + 'static> GliumDrawer<F> {
} }
} }
pub struct RenderTextureSpec<'a> {
texture: &'a Texture2d,
texture_kind: usize,
y_inverted: bool,
surface_dimensions: (u32, u32),
surface_location: (i32, i32),
screen_size: (u32, u32),
blending: glium::Blend,
}
pub struct TextureMetadata { pub struct TextureMetadata {
pub texture: Texture2d, pub texture: Texture2d,
pub fragment: usize, pub fragment: usize,
@ -368,13 +368,14 @@ impl<F: GLGraphicsBackend + 'static> GliumDrawer<F> {
} }
self.render_texture( self.render_texture(
frame, frame,
&metadata.texture, RenderTextureSpec {
metadata.fragment, texture: &metadata.texture,
metadata.y_inverted, texture_kind: metadata.fragment,
metadata.dimensions, y_inverted: metadata.y_inverted,
(x, y), surface_dimensions: metadata.dimensions,
screen_dimensions, surface_location: (x, y),
::glium::Blend { screen_size: screen_dimensions,
blending: ::glium::Blend {
color: ::glium::BlendingFunction::Addition { color: ::glium::BlendingFunction::Addition {
source: ::glium::LinearBlendingFactor::One, source: ::glium::LinearBlendingFactor::One,
destination: ::glium::LinearBlendingFactor::OneMinusSourceAlpha, destination: ::glium::LinearBlendingFactor::OneMinusSourceAlpha,
@ -385,6 +386,7 @@ impl<F: GLGraphicsBackend + 'static> GliumDrawer<F> {
}, },
..Default::default() ..Default::default()
}, },
},
); );
} }
} }