139 lines
3.5 KiB
Go
139 lines
3.5 KiB
Go
/*
|
|
Copyright © 2024 filifa
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
package cmd
|
|
|
|
/*
|
|
#cgo LDFLAGS: -lprojectM-4
|
|
#include "projectM-4/projectM.h"
|
|
#include <stdlib.h>
|
|
*/
|
|
import "C"
|
|
|
|
import (
|
|
"container/ring"
|
|
"errors"
|
|
"unsafe"
|
|
|
|
"github.com/veandco/go-sdl2/sdl"
|
|
)
|
|
|
|
// milkDropWindow represents the window projectm will render visualizations in.
|
|
type milkDropWindow struct {
|
|
window *sdl.Window
|
|
context sdl.GLContext
|
|
handle C.projectm_handle
|
|
preset *ring.Ring
|
|
}
|
|
|
|
/*
|
|
* setupPresets initializes a ring to store the passed presets in.
|
|
*/
|
|
func (m *milkDropWindow) setupPresets(presets []string) {
|
|
m.preset = ring.New(len(presets))
|
|
for _, preset := range presets {
|
|
m.preset.Value = preset
|
|
m.preset = m.preset.Next()
|
|
}
|
|
}
|
|
|
|
/*
|
|
* prevPreset sets the milkDropWindow's preset to the one after the current
|
|
* preset.
|
|
*/
|
|
func (m *milkDropWindow) nextPreset(smooth bool) {
|
|
m.preset = m.preset.Next()
|
|
m.loadPreset(smooth)
|
|
}
|
|
|
|
/*
|
|
* prevPreset sets the milkDropWindow's preset to the one before the current
|
|
* preset.
|
|
*/
|
|
func (m *milkDropWindow) prevPreset(smooth bool) {
|
|
m.preset = m.preset.Prev()
|
|
m.loadPreset(smooth)
|
|
}
|
|
|
|
/*
|
|
* newMilkDropWindow returns a new milkDropWindow with the given width and
|
|
* height, and sets presets available to the window.
|
|
*/
|
|
func newMilkDropWindow(width, height int32, presets []string) (*milkDropWindow, error) {
|
|
var m milkDropWindow
|
|
var err error
|
|
|
|
m.setupPresets(presets)
|
|
|
|
m.window, err = sdl.CreateWindow("milkbucket", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, width, height, sdl.WINDOW_OPENGL|sdl.WINDOW_RESIZABLE)
|
|
if err != nil {
|
|
return &m, err
|
|
}
|
|
|
|
m.context, err = m.window.GLCreateContext()
|
|
if err != nil {
|
|
return &m, err
|
|
}
|
|
|
|
m.handle = C.projectm_create()
|
|
if m.handle == nil {
|
|
return &m, errors.New("error creating projectM instance")
|
|
}
|
|
|
|
C.projectm_set_window_size(m.handle, C.ulong(width), C.ulong(height))
|
|
|
|
return &m, nil
|
|
}
|
|
|
|
/*
|
|
* destroy handles cleanup of the milkDropWindow.
|
|
*/
|
|
func (m *milkDropWindow) destroy() {
|
|
C.projectm_destroy(m.handle)
|
|
sdl.GLDeleteContext(m.context)
|
|
m.window.Destroy()
|
|
}
|
|
|
|
/*
|
|
* loadPreset loads the preset file currently pointed to by m.preset. smooth
|
|
* determines whether there is a smooth transition between the current preset
|
|
* and the new preset.
|
|
*/
|
|
func (m *milkDropWindow) loadPreset(smooth bool) {
|
|
preset := m.preset.Value.(string)
|
|
cPreset := C.CString(preset)
|
|
defer C.free(unsafe.Pointer(cPreset))
|
|
C.projectm_load_preset_file(m.handle, cPreset, C.bool(smooth))
|
|
}
|
|
|
|
/*
|
|
* render passes data to projectm for rendering. It returns a bool for if the
|
|
* program should keep running and an error.
|
|
*/
|
|
func (m *milkDropWindow) render(data []int16) {
|
|
C.projectm_pcm_add_int16(m.handle, (*C.int16_t)(&data[0]), C.uint(len(data)), C.PROJECTM_STEREO)
|
|
|
|
C.projectm_opengl_render_frame(m.handle)
|
|
m.window.GLSwap()
|
|
}
|
|
|
|
/*
|
|
* resize informs projectm of the new window size.
|
|
*/
|
|
func (m *milkDropWindow) resize(w, h int32) {
|
|
C.projectm_set_window_size(m.handle, C.ulong(w), C.ulong(h))
|
|
}
|