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output: Add coordinate transformations

pull/20/head
Andri Yngvason 2020-03-07 13:50:53 +00:00
parent 433ee722ec
commit 8ff7128714
2 changed files with 69 additions and 0 deletions
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9
include/output.h
View File

@ -54,3 +54,12 @@ struct output* output_first(struct wl_list* list);
uint32_t output_get_transformed_width(const struct output* self); uint32_t output_get_transformed_width(const struct output* self);
uint32_t output_get_transformed_height(const struct output* self); uint32_t output_get_transformed_height(const struct output* self);
void output_transform_coord(const struct output* self,
uint32_t src_x, uint32_t src_y,
uint32_t* dst_x, uint32_t* dst_y);
void output_transform_box_coord(const struct output* self,
uint32_t src_x0, uint32_t src_y0,
uint32_t src_x1, uint32_t src_y1,
uint32_t* dst_x0, uint32_t* dst_y0,
uint32_t* dst_x1, uint32_t* dst_y1);

60
src/output.c
View File

@ -28,6 +28,66 @@
#include "xdg-output-unstable-v1.h" #include "xdg-output-unstable-v1.h"
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
void output_transform_coord(const struct output* self,
uint32_t src_x, uint32_t src_y,
uint32_t* dst_x, uint32_t* dst_y)
{
switch (self->transform) {
case WL_OUTPUT_TRANSFORM_NORMAL:
*dst_x = src_x;
*dst_y = src_y;
break;
case WL_OUTPUT_TRANSFORM_90:
*dst_x = src_y;
*dst_y = self->width - src_x;
break;
case WL_OUTPUT_TRANSFORM_180:
*dst_x = self->width - src_x;
*dst_y = self->height - src_y;
break;
case WL_OUTPUT_TRANSFORM_270:
*dst_x = self->height - src_y;
*dst_y = src_x;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED:
*dst_x = self->width - src_x;
*dst_y = src_y;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
*dst_x = self->height - src_y;
*dst_y = self->width - src_x;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
*dst_x = src_x;
*dst_y = self->height - src_y;
break;
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
*dst_x = src_y;
*dst_y = src_x;
break;
}
}
void output_transform_box_coord(const struct output* self,
uint32_t src_x0, uint32_t src_y0,
uint32_t src_x1, uint32_t src_y1,
uint32_t* dst_x0, uint32_t* dst_y0,
uint32_t* dst_x1, uint32_t* dst_y1)
{
uint32_t x0 = 0, y0 = 0, x1 = 0, y1 = 0;
output_transform_coord(self, src_x0, src_y0, &x0, &y0);
output_transform_coord(self, src_x1, src_y1, &x1, &y1);
*dst_x0 = MIN(x0, x1);
*dst_x1 = MAX(x0, x1);
*dst_y0 = MIN(y0, y1);
*dst_y1 = MAX(y0, y1);
}
static bool is_transform_90_degrees(enum wl_output_transform transform) static bool is_transform_90_degrees(enum wl_output_transform transform)
{ {
switch (transform) { switch (transform) {