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gl renderer: Move more work to the vertex shaders

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This commit is contained in:
Timm Bäder 2019-12-17 16:46:05 +01:00
parent f79c807645
commit b8aa51d522
2 changed files with 30 additions and 14 deletions
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21
gsk/resources/glsl/inset_shadow.glsl
View File

@ -1,25 +1,34 @@
// VERTEX_SHADER:
uniform vec4 u_color;
_OUT_ vec4 final_color;
void main() {
gl_Position = u_projection * u_modelview * vec4(aPosition, 0.0, 1.0);
final_color = u_color;
final_color.rgb *= final_color.a;
final_color *= u_alpha;
}
// FRAGMENT_SHADER:
uniform float u_spread;
uniform vec4 u_color;
uniform vec2 u_offset;
uniform vec4[3] u_outline_rect;
_IN_ vec4 final_color;
void main() {
vec4 f = gl_FragCoord;
vec4 color;
f.x += u_viewport.x;
f.y = (u_viewport.y + u_viewport.w) - f.y;
RoundedRect outside = create_rect(u_outline_rect);
RoundedRect inside = rounded_rect_shrink(outside, vec4(u_spread));
vec4 color = vec4(u_color.rgb * u_color.a, u_color.a);
color = color * clamp (rounded_rect_coverage (outside, f.xy) -
rounded_rect_coverage (inside, f.xy - u_offset),
0.0, 1.0);
setOutputColor(color * u_alpha);
color = final_color * clamp (rounded_rect_coverage (outside, f.xy) -
rounded_rect_coverage (inside, f.xy - u_offset),
0.0, 1.0);
setOutputColor(color);
}

23
gsk/resources/glsl/unblurred_outset_shadow.glsl
View File

@ -1,27 +1,34 @@
// VERTEX_SHADER:
uniform vec4 u_color;
_OUT_ vec4 final_color;
void main() {
gl_Position = u_projection * u_modelview * vec4(aPosition, 0.0, 1.0);
final_color = u_color;
final_color.rgb *= final_color.a;
final_color *= u_alpha;
}
// FRAGMENT_SHADER:
uniform float u_spread;
uniform vec4 u_color;
uniform vec2 u_offset;
uniform vec4[3] u_outline_rect;
_IN_ vec4 final_color;
void main() {
vec4 f = gl_FragCoord;
vec4 color;
f.x += u_viewport.x;
f.y = (u_viewport.y + u_viewport.w) - f.y;
RoundedRect inside = create_rect(u_outline_rect);
RoundedRect outside = rounded_rect_shrink(inside, vec4(- u_spread));
vec4 color = vec4(u_color.rgb * u_color.a, u_color.a);
color = color * clamp (rounded_rect_coverage (outside, f.xy - u_offset) -
rounded_rect_coverage (inside, f.xy),
0.0, 1.0);
setOutputColor(color * u_alpha);
color = final_color * clamp (rounded_rect_coverage (outside, f.xy - u_offset) -
rounded_rect_coverage (inside, f.xy),
0.0, 1.0);
setOutputColor(color);
}