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metal: hollow rect cursor works

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This commit is contained in:
Mitchell Hashimoto
2022-10-31 10:33:31 -07:00
parent 20adaa7b66
commit 9e628635c2
1 changed files with 32 additions and 29 deletions
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61
src/shaders/cell.metal
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@ -49,6 +49,7 @@ struct VertexIn {
struct VertexOut {
float4 position [[ position ]];
float2 cell_size;
uint8_t mode;
float4 color;
float2 tex_coord;
@ -82,6 +83,7 @@ vertex VertexOut uber_vertex(
VertexOut out;
out.mode = input.mode;
out.cell_size = uniforms.cell_size;
out.color = float4(input.color) / 255.0f;
switch (input.mode) {
case MODE_BG:
@ -133,12 +135,12 @@ vertex VertexOut uber_vertex(
break;
case MODE_CURSOR_RECT_HOLLOW:
// Top-left position of this cell is needed for the hollow rect.
out.tex_coord = cell_pos;
// Same as background since we're taking up the whole cell.
cell_pos = cell_pos + cell_size_scaled * position;
out.position = uniforms.projection_matrix * float4(cell_pos, 0.0f, 1.0);
// Top-left position of this cell is needed for the hollow rect.
out.tex_coord = cell_pos;
break;
case MODE_CURSOR_BAR: {
@ -219,39 +221,40 @@ fragment float4 uber_fragment(
case MODE_CURSOR_RECT:
return in.color;
case MODE_CURSOR_RECT_HOLLOW:
case MODE_CURSOR_RECT_HOLLOW: {
// Okay so yeah this is probably horrendously slow and a shader
// should never do this, but we only ever render a cursor for ONE
// rectangle so we take the slowdown for that one.
// // We subtracted one from cell size because our coordinates start at 0.
// // So a width of 50 means max pixel of 49.
// vec2 cell_size_coords = cell_size - 1;
//
// // Apply padding
// vec2 padding = vec2(1.,1.);
// cell_size_coords = cell_size_coords - (padding * 2);
// vec2 screen_cell_pos_padded = screen_cell_pos + padding;
//
// // Convert our frag coord to offset of this cell. We have to subtract
// // 0.5 because the frag coord is in center pixels.
// vec2 cell_frag_coord = gl_FragCoord.xy - screen_cell_pos_padded - 0.5;
//
// // If the frag coords are in the bounds, then we color it.
// const float eps = 0.1;
// if (cell_frag_coord.x >= 0 && cell_frag_coord.y >= 0 &&
// cell_frag_coord.x <= cell_size_coords.x &&
// cell_frag_coord.y <= cell_size_coords.y) {
// if (abs(cell_frag_coord.x) < eps ||
// abs(cell_frag_coord.x - cell_size_coords.x) < eps ||
// abs(cell_frag_coord.y) < eps ||
// abs(cell_frag_coord.y - cell_size_coords.y) < eps) {
// out_FragColor = color;
// }
// }
// We subtracted one from cell size because our coordinates start at 0.
// So a width of 50 means max pixel of 49.
float2 cell_size_coords = in.cell_size - 1;
// Apply padding
float2 padding = float2(1.0f, 1.0f);
cell_size_coords = cell_size_coords - (padding * 2);
float2 screen_cell_pos_padded = in.tex_coord + padding;
// Convert our frag coord to offset of this cell. We have to subtract
// 0.5 because the frag coord is in center pixels.
float2 cell_frag_coord = in.position.xy - screen_cell_pos_padded - 0.5;
// If the frag coords are in the bounds, then we color it.
const float eps = 0.1;
if (cell_frag_coord.x >= 0 && cell_frag_coord.y >= 0 &&
cell_frag_coord.x <= cell_size_coords.x &&
cell_frag_coord.y <= cell_size_coords.y) {
if (abs(cell_frag_coord.x) < eps ||
abs(cell_frag_coord.x - cell_size_coords.x) < eps ||
abs(cell_frag_coord.y) < eps ||
abs(cell_frag_coord.y - cell_size_coords.y) < eps) {
return in.color;
}
}
// Default to no color.
return float4(0.0f);
}
case MODE_CURSOR_BAR:
return in.color;