mirror of
https://github.com/kovidgoyal/kitty.git
synced 2026-02-01 11:34:59 +01:00
cf848982ed
The shader compiler automatically redeclares gl_ClipDistance for us, since we index it with constants.
25 lines
694 B
GLSL
25 lines
694 B
GLSL
out vec2 texcoord;
|
|
uniform vec4 src_rect, dest_rect, viewport;
|
|
|
|
#define left 0
|
|
#define top 1
|
|
#define right 2
|
|
#define bottom 3
|
|
|
|
const ivec2 vertex_pos_map[4] = ivec2[4](
|
|
ivec2(right, top),
|
|
ivec2(right, bottom),
|
|
ivec2(left, bottom),
|
|
ivec2(left, top)
|
|
);
|
|
|
|
void main() {
|
|
ivec2 pos = vertex_pos_map[gl_VertexID];
|
|
texcoord = vec2(src_rect[pos.x], src_rect[pos.y]);
|
|
gl_Position = vec4(dest_rect[pos.x], dest_rect[pos.y], 0, 1);
|
|
gl_ClipDistance[left] = gl_Position.x - viewport[left];
|
|
gl_ClipDistance[right] = viewport[right] - gl_Position.x;
|
|
gl_ClipDistance[top] = viewport[top] - gl_Position.y;
|
|
gl_ClipDistance[bottom] = gl_Position.y - viewport[bottom];
|
|
}
|