141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include <tgmath.h>
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#include <wayland-server.h>
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#include <wlr/types/wlr_output.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/util/list.h>
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static const float transforms[][4] = {
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[WL_OUTPUT_TRANSFORM_NORMAL] = {
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1.0f, 0.0f,
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0.0f, -1.0f,
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},
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[WL_OUTPUT_TRANSFORM_90] = {
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0.0f, -1.0f,
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-1.0f, 0.0f,
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},
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[WL_OUTPUT_TRANSFORM_180] = {
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-1.0f, 0.0f,
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0.0f, 1.0f,
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},
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[WL_OUTPUT_TRANSFORM_270] = {
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0.0f, 1.0f,
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1.0f, 0.0f,
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},
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[WL_OUTPUT_TRANSFORM_FLIPPED] = {
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-1.0f, 0.0f,
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0.0f, -1.0f,
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},
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[WL_OUTPUT_TRANSFORM_FLIPPED_90] = {
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0.0f, 1.0f,
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-1.0f, 0.0f,
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},
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[WL_OUTPUT_TRANSFORM_FLIPPED_180] = {
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1.0f, 0.0f,
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0.0f, 1.0f,
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},
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[WL_OUTPUT_TRANSFORM_FLIPPED_270] = {
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0.0f, -1.0f,
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1.0f, 0.0f,
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},
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};
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// Equivilent to glOrtho(0, width, 0, height, 1, -1) with the transform applied
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static void set_matrix(float mat[static 16], int32_t width, int32_t height,
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enum wl_output_transform transform) {
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memset(mat, 0, sizeof(*mat) * 16);
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const float *t = transforms[transform];
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float x = 2.0f / width;
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float y = 2.0f / height;
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// Rotation + relection
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mat[0] = x * t[0];
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mat[1] = x * t[1];
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mat[4] = y * t[2];
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mat[5] = y * t[3];
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// Translation
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mat[3] = -copysign(1.0f, mat[0] + mat[1]);
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mat[7] = -copysign(1.0f, mat[4] + mat[5]);
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// Identity
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mat[10] = 1.0f;
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mat[15] = 1.0f;
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}
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void wlr_output_update_matrix(struct wlr_output *output) {
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set_matrix(output->transform_matrix, output->width, output->height, output->transform);
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}
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struct wlr_output *wlr_output_create(struct wlr_output_impl *impl,
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struct wlr_output_state *state) {
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struct wlr_output *output = calloc(1, sizeof(struct wlr_output));
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output->impl = impl;
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output->state = state;
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output->modes = list_create();
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output->transform = WL_OUTPUT_TRANSFORM_NORMAL;
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wl_signal_init(&output->events.frame);
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wl_signal_init(&output->events.resolution);
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return output;
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}
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void wlr_output_enable(struct wlr_output *output, bool enable) {
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output->impl->enable(output->state, enable);
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}
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bool wlr_output_set_mode(struct wlr_output *output, struct wlr_output_mode *mode) {
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if (!output->impl || !output->impl->set_mode) {
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return false;
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}
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bool result = output->impl->set_mode(output->state, mode);
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if (result) {
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wlr_output_update_matrix(output);
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}
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return result;
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}
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void wlr_output_transform(struct wlr_output *output,
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enum wl_output_transform transform) {
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wlr_output_update_matrix(output);
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output->impl->transform(output->state, transform);
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}
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bool wlr_output_set_cursor(struct wlr_output *output,
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const uint8_t *buf, int32_t stride, uint32_t width, uint32_t height) {
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if (!output->impl || !output->impl->set_cursor) {
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return false;
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}
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return output->impl->set_cursor(output->state, buf, stride, width, height);
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}
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bool wlr_output_move_cursor(struct wlr_output *output, int x, int y) {
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if (!output->impl || !output->impl->move_cursor) {
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return false;
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}
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return output->impl->move_cursor(output->state, x, y);
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}
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void wlr_output_destroy(struct wlr_output *output) {
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if (!output) return;
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output->impl->destroy(output->state);
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for (size_t i = 0; output->modes && i < output->modes->length; ++i) {
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free(output->modes->items[i]);
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}
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list_free(output->modes);
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free(output);
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}
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void wlr_output_effective_resolution(struct wlr_output *output,
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int *width, int *height) {
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// TODO: Scale factor
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if (output->transform % 2 == 1) {
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*width = output->height;
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*height = output->width;
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} else {
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*width = output->width;
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*height = output->height;
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}
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}
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