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feat(term): make cursor hollow when un-focused

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Closes #29.
This commit is contained in:
Leroy Hopson 2024-04-28 22:56:55 +12:00 • committed by Leroy Hopson
parent c4c0f9c90a
commit 4c4e61cf99
14 changed files with 52 additions and 20 deletions
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27
addons/godot_xterm/shaders/common.gdshaderinc
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@ -3,6 +3,7 @@
#define FLAG_INVERSE 1 << 0
#define FLAG_BLINK 1 << 1
#define FLAG_CURSOR 1 << 2
#define transparent vec4(0)
@ -14,6 +15,7 @@ uniform vec2 grid_size;
uniform sampler2D attributes;
uniform bool inverse_enabled = true;
uniform bool has_focus = false;
#ifdef BACKGROUND
uniform vec4 background_color;
@ -48,17 +50,21 @@ void fragment() {
color = texture(TEXTURE, UV);
#endif
if (has_attribute(sample_uv, FLAG_INVERSE) && inverse_enabled) {
bool unfocused_cursor = !has_focus && has_attribute(sample_uv, FLAG_CURSOR);
#ifdef BACKGROUND
if (has_attribute(sample_uv, FLAG_INVERSE) && inverse_enabled) {
vec4 bg_color = textureLod(screen_texture, SCREEN_UV, 0.0);
vec4 target_color;
target_color.a = color.a + (1.0 - color.a) * bg_color.a;
target_color.rgb = 1.0 / target_color.a * (color.a * color.rgb + (1.0 - color.a) * bg_color.a * bg_color.rgb);
#else
vec4 target_color = color;
#endif
color = vec4(1.0 - target_color.rgb, target_color.a);
}
#else
if (has_attribute(sample_uv, FLAG_INVERSE) && inverse_enabled && !unfocused_cursor) {
color.rgb = vec3(1.0 - color.rgb);
}
#endif
#ifdef FOREGROUND
if (has_attribute(sample_uv, FLAG_BLINK)) {
@ -70,9 +76,18 @@ void fragment() {
}
#endif
#if defined(FOREGROUND) || defined(BACKGROUND)
COLOR = color;
#ifdef BACKGROUND
if (unfocused_cursor) {
// Draw hollow cursor when not focused.
bool isBorderX = (UV.x * size.x - float(cell_x) * cell_size.x) < 1.0 || (float(cell_x + 1) * cell_size.x - UV.x * size.x) < 1.0;
bool isBorderY = (UV.y * size.y - float(cell_y) * cell_size.y) < 1.0 || (float(cell_y + 1) * cell_size.y - UV.y * size.y) < 1.0;
if (!isBorderX && !isBorderY) {
color = transparent;
}
}
#endif
COLOR = color;
} else { // Outside the grid.
COLOR = transparent;
}