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Add tablet example

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This commit is contained in:
Drew DeVault 2017-06-15 16:15:12 -04:00
parent 2443a070e7
commit def3d7c64f
4 changed files with 175 additions and 11 deletions
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92
example/tablet.c
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@ -21,6 +21,13 @@
struct sample_state {
struct wlr_renderer *renderer;
bool proximity, tap;
double distance;
double pressure;
double x_mm, y_mm;
double width_mm, height_mm;
struct wl_list link;
float tool_color[4];
};
static void handle_output_frame(struct output_state *output, struct timespec *ts) {
@ -28,13 +35,41 @@ static void handle_output_frame(struct output_state *output, struct timespec *ts
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];
float color[4] = { 0, 1.0, 0, 1.0 };
wlr_matrix_scale(&matrix, 128, 128, 1);
wlr_matrix_mul(&wlr_output->transform_matrix, &matrix, &matrix);
wlr_render_colored_ellipse(sample->renderer, &color, &matrix);
float matrix[16], view[16];
float pad_color[4] = { 0.75, 0.75, 0.75, 1.0 };
float distance = 0.8f * (1 - sample->distance);
float tool_color[4] = { distance, distance, distance, 1 };
for (size_t i = 0; 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, &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);
}
@ -46,13 +81,58 @@ static void handle_keyboard_key(struct keyboard_state *kbstate,
}
}
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) {
float default_color[4] = { 1, 1, 1, 1 };
memcpy(sample->tool_color, default_color, 4);
} else {
for (size_t i = 0; i < 3; ++i) {
if (button % 3 != i) {
sample->tool_color[button % 3] = 0;
}
}
}
}
int main(int argc, char *argv[]) {
struct sample_state state = { 0 };
struct sample_state state = {
.tool_color = { 1, 1, 1, 1 }
};
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;
state.renderer = wlr_gles3_renderer_init();