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backend: gl: draw border for rounded windows

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Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2022-01-19 10:25:01 +00:00
parent b6c14989e1
commit 4aac801a12
2 changed files with 19 additions and 1 deletions
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18
src/backend/gl/gl_common.c
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@@ -394,6 +394,13 @@ static void _gl_compose(backend_t *base, struct backend_image *img, GLuint targe
if (gd->win_shader.uniform_corner_radius >= 0) {
glUniform1f(gd->win_shader.uniform_corner_radius, (float)img->corner_radius);
}
if (gd->win_shader.uniform_border_width >= 0) {
glUniform1f(gd->win_shader.uniform_border_width, (float)img->border_width);
}
if (gd->win_shader.uniform_border_color >= 0) {
glUniform3f(gd->win_shader.uniform_border_color, (float)img->border_color.red,
(float)img->border_color.green, (float)img->border_color.blue);
}
// log_trace("Draw: %d, %d, %d, %d -> %d, %d (%d, %d) z %d\n",
// x, y, width, height, dx, dy, ptex->width, ptex->height, z);
@@ -893,6 +900,8 @@ static int gl_win_shader_from_string(const char *vshader_str, const char *fshade
bind_uniform(ret, brightness);
bind_uniform(ret, max_brightness);
bind_uniform(ret, corner_radius);
bind_uniform(ret, border_width);
bind_uniform(ret, border_color);
gl_check_err();
@@ -1524,6 +1533,8 @@ const char *win_shader_glsl = GLSL(330,
uniform float opacity;
uniform float dim;
uniform float corner_radius;
uniform float border_width;
uniform vec3 border_color;
uniform bool invert_color;
in vec2 texcoord;
uniform sampler2D tex;
@@ -1555,7 +1566,12 @@ const char *win_shader_glsl = GLSL(330,
vec2 inner_size = outer_size - vec2(corner_radius) * 2.0f;
float rect_distance = rectangle_sdf(texcoord - outer_size / 2.0f,
inner_size / 2.0f) - corner_radius;
c *= 1.0f - clamp(rect_distance, 0.0f, 1.0f);
if (rect_distance > 0.0f) {
c = (1.0f - clamp(rect_distance, 0.0f, 1.0f)) * vec4(border_color, 1.0);
} else {
float factor = clamp(rect_distance + border_width, 0.0f, 1.0f);
c = (1.0f - factor) * c + factor * vec4(border_color, 1.0);
}
gl_FragColor = c;
}

2
src/backend/gl/gl_common.h
View File

@@ -36,6 +36,8 @@ typedef struct {
GLint uniform_brightness;
GLint uniform_max_brightness;
GLint uniform_corner_radius;
GLint uniform_border_width;
GLint uniform_border_color;
} gl_win_shader_t;
// Program and uniforms for brightness shader