mirrors/kitty
1
0
Fork 0
mirror of https://github.com/kovidgoyal/kitty synced 2026-06-11 02:59:40 +02:00
Code Issues Packages Projects Releases Wiki Activity

clamp logo position to nearest pixel

Browse Source
This commit is contained in:
Kovid Goyal
2021-12-05 15:53:20 +05:30
parent f01446ff25
commit a7eb9850b7
1 changed files with 12 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
kitty/shaders.c
View File

@@ -598,14 +598,24 @@ gl_size(const unsigned int sz, const unsigned int viewport_size) {
return ans + px * (sz - mapped_val);
}
static GLfloat
clamp_position_to_nearest_pixel(GLfloat pos, const unsigned int viewport_size) {
const GLfloat px = 2.f / viewport_size;
const GLfloat distance = pos + 1.f;
const GLfloat num_of_pixels = roundf(distance / px);
return -1.f + num_of_pixels * px;
}
static void
draw_window_logo(ssize_t vao_idx, OSWindow *os_window, const WindowLogoRenderData *wl, const CellRenderData *crd) {
if (os_window->live_resize.in_progress) return;
BLEND_PREMULT;
GLfloat logo_width_gl = gl_size(wl->instance->width, os_window->viewport_width);
GLfloat logo_height_gl = gl_size(wl->instance->height, os_window->viewport_height);
GLfloat logo_left_gl = crd->gl.xstart + crd->gl.width * wl->position.canvas_x - logo_width_gl * wl->position.image_x;
GLfloat logo_top_gl = crd->gl.ystart - crd->gl.height * wl->position.canvas_y + logo_height_gl * wl->position.image_y;
GLfloat logo_left_gl = clamp_position_to_nearest_pixel(
crd->gl.xstart + crd->gl.width * wl->position.canvas_x - logo_width_gl * wl->position.image_x, os_window->viewport_width);
GLfloat logo_top_gl = clamp_position_to_nearest_pixel(
crd->gl.ystart - crd->gl.height * wl->position.canvas_y + logo_height_gl * wl->position.image_y, os_window->viewport_height);
static ImageRenderData ird = {.group_count=1};
ird.texture_id = wl->instance->texture_id;
gpu_data_for_image(&ird, logo_left_gl, logo_top_gl, logo_left_gl + logo_width_gl, logo_top_gl - logo_height_gl);