diff options
Diffstat (limited to 'example/tablet.c')
| -rw-r--r-- | example/tablet.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/example/tablet.c b/example/tablet.c new file mode 100644 index 00000000..3c5b583e --- /dev/null +++ b/example/tablet.c @@ -0,0 +1,164 @@ +#define _POSIX_C_SOURCE 199309L +#define _XOPEN_SOURCE 500 +#include <stdio.h> +#include <stdlib.h> +#include <time.h> +#include <string.h> +#include <unistd.h> +#include <wayland-server.h> +#include <wayland-server-protocol.h> +#include <xkbcommon/xkbcommon.h> +#include <GLES3/gl3.h> +#include <wlr/render/matrix.h> +#include <wlr/render/gles3.h> +#include <wlr/render.h> +#include <wlr/backend.h> +#include <wlr/session.h> +#include <wlr/types.h> +#include <math.h> +#include "shared.h" +#include "cat.h" + +struct sample_state { + struct wlr_renderer *renderer; + bool proximity, tap, button; + double distance; + double pressure; + double x_mm, y_mm; + double width_mm, height_mm; + struct wl_list link; + float tool_color[4]; + float pad_color[4]; +}; + +static void handle_output_frame(struct output_state *output, struct timespec *ts) { + struct compositor_state *state = output->compositor; + struct sample_state *sample = state->data; + struct wlr_output *wlr_output = output->output; + + int32_t width, height; + wlr_output_effective_resolution(wlr_output, &width, &height); + + wlr_renderer_begin(sample->renderer, wlr_output); + + float matrix[16], view[16]; + float distance = 0.8f * (1 - sample->distance); + float tool_color[4] = { distance, distance, distance, 1 }; + for (size_t i = 0; sample->button && i < 4; ++i) { + tool_color[i] = sample->tool_color[i]; + } + float scale = 4; + + float pad_width = sample->width_mm * scale; + float pad_height = sample->height_mm * scale; + float left = width / 2.0f - pad_width / 2.0f; + float top = height / 2.0f - pad_height / 2.0f; + wlr_matrix_translate(&matrix, left, top, 0); + wlr_matrix_scale(&view, pad_width, pad_height, 1); + wlr_matrix_mul(&matrix, &view, &view); + wlr_matrix_mul(&wlr_output->transform_matrix, &view, &matrix); + wlr_render_colored_quad(sample->renderer, &sample->pad_color, &matrix); + + if (sample->proximity) { + wlr_matrix_translate(&matrix, + sample->x_mm * scale - 8 * (sample->pressure + 1) + left, + sample->y_mm * scale - 8 * (sample->pressure + 1) + top, 0); + wlr_matrix_scale(&view, + 16 * (sample->pressure + 1), + 16 * (sample->pressure + 1), 1); + wlr_matrix_mul(&matrix, &view, &view); + wlr_matrix_mul(&wlr_output->transform_matrix, &view, &matrix); + wlr_render_colored_ellipse(sample->renderer, &tool_color, &matrix); + } + + wlr_renderer_end(sample->renderer); +} + +static void handle_keyboard_key(struct keyboard_state *kbstate, + xkb_keysym_t sym, enum wlr_key_state key_state) { + if (sym == XKB_KEY_Escape) { + kbstate->compositor->exit = true; + } +} + +static void handle_tool_axis(struct tablet_tool_state *tstate, + struct wlr_tablet_tool_axis *event) { + struct sample_state *sample = tstate->compositor->data; + sample->width_mm = event->width_mm; + sample->height_mm = event->height_mm; + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_X)) { + sample->x_mm = event->x_mm; + } + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_Y)) { + sample->y_mm = event->y_mm; + } + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_DISTANCE)) { + sample->distance = event->distance; + } + if ((event->updated_axes & WLR_TABLET_TOOL_AXIS_PRESSURE)) { + sample->pressure = event->pressure; + } +} + +static void handle_tool_proximity(struct tablet_tool_state *tstate, + enum wlr_tablet_tool_proximity_state state) { + struct sample_state *sample = tstate->compositor->data; + sample->proximity = state == WLR_TABLET_TOOL_PROXIMITY_IN; +} + +static void handle_tool_button(struct tablet_tool_state *tstate, + uint32_t button, enum wlr_button_state state) { + struct sample_state *sample = tstate->compositor->data; + if (state == WLR_BUTTON_RELEASED) { + sample->button = false; + } else { + sample->button = true; + for (size_t i = 0; i < 3; ++i) { + if (button % 3 == i) { + sample->tool_color[i] = 0; + } else { + sample->tool_color[i] = 1; + } + } + } +} + +static void handle_pad_button(struct tablet_pad_state *pstate, + uint32_t button, enum wlr_button_state state) { + struct sample_state *sample = pstate->compositor->data; + float default_color[4] = { 0.75, 0.75, 0.75, 1.0 }; + if (state == WLR_BUTTON_RELEASED) { + memcpy(sample->pad_color, default_color, sizeof(default_color)); + } else { + for (size_t i = 0; i < 3; ++i) { + if (button % 3 == i) { + sample->pad_color[i] = 0; + } else { + sample->pad_color[i] = 1; + } + } + } +} + +int main(int argc, char *argv[]) { + struct sample_state state = { + .tool_color = { 1, 1, 1, 1 }, + .pad_color = { 0.75, 0.75, 0.75, 1.0 } + }; + struct compositor_state compositor; + + compositor_init(&compositor); + compositor.output_frame_cb = handle_output_frame; + compositor.keyboard_key_cb = handle_keyboard_key; + compositor.tool_axis_cb = handle_tool_axis; + compositor.tool_proximity_cb = handle_tool_proximity; + compositor.tool_button_cb = handle_tool_button; + compositor.pad_button_cb = handle_pad_button; + + state.renderer = wlr_gles3_renderer_init(); + + compositor.data = &state; + compositor_run(&compositor); + + wlr_renderer_destroy(state.renderer); +} |