ardour/livetrax
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refine a-eq inline display size + grid

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This commit is contained in:
Robin Gareus 2016-07-14 19:44:03 +02:00
parent f53655d17c
commit 1d78150d45
1 changed files with 17 additions and 6 deletions
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23
libs/plugins/a-eq.lv2/a-eq.c
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@ -492,7 +492,7 @@ static LV2_Inline_Display_Image_Surface *
render_inline (LV2_Handle instance, uint32_t w, uint32_t max_h)
{
Aeq* self = (Aeq*)instance;
uint32_t h = MIN (w * 9 / 16, max_h);
uint32_t h = MIN (1 | (uint32_t)ceilf (w * 9.f / 16.f), max_h);
if (!self->display || self->w != w || self->h != h) {
if (self->display) cairo_surface_destroy(self->display);
@ -510,19 +510,30 @@ render_inline (LV2_Handle instance, uint32_t w, uint32_t max_h)
cairo_set_line_width(cr, 1.0);
// draw grid 5dB steps
const double dash2[] = {1, 3};
// prepare grid drawing
cairo_save (cr);
cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
const double dash2[] = {1, 3};
//cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
cairo_set_dash(cr, dash2, 2, 2);
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
for (uint32_t d = 1; d < 8; ++d) {
const float y = -.5 + floorf (h * (d * 5.f / 40.f));
// draw x-grid 6dB steps
for (int32_t d = -18; d <= 18; d+=6) {
float y = (float)h * (d / 40.0 + 0.5);
y = rint (y) - .5;
cairo_move_to (cr, 0, y);
cairo_line_to (cr, w, y);
cairo_stroke (cr);
}
// draw y-axis grid 100, 1k, 10K
for (int32_t f = 100; f <= 10000; f *= 10) {
float x = w * log10 (f / 20.0) / log10 (1000.0);
x = rint (x) - .5;
cairo_move_to (cr, x, 0);
cairo_line_to (cr, x, h);
cairo_stroke (cr);
}
cairo_restore (cr);