mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
5edbfc474c
Drive-by polish. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1483044517-5770-9-git-send-email-daniel.vetter@ffwll.ch
430 lines
11 KiB
C
430 lines
11 KiB
C
/*
|
|
* Copyright (C) 2011-2013 Intel Corporation
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/export.h>
|
|
#include <linux/kernel.h>
|
|
#include <drm/drmP.h>
|
|
#include <drm/drm_rect.h>
|
|
|
|
/**
|
|
* drm_rect_intersect - intersect two rectangles
|
|
* @r1: first rectangle
|
|
* @r2: second rectangle
|
|
*
|
|
* Calculate the intersection of rectangles @r1 and @r2.
|
|
* @r1 will be overwritten with the intersection.
|
|
*
|
|
* RETURNS:
|
|
* %true if rectangle @r1 is still visible after the operation,
|
|
* %false otherwise.
|
|
*/
|
|
bool drm_rect_intersect(struct drm_rect *r1, const struct drm_rect *r2)
|
|
{
|
|
r1->x1 = max(r1->x1, r2->x1);
|
|
r1->y1 = max(r1->y1, r2->y1);
|
|
r1->x2 = min(r1->x2, r2->x2);
|
|
r1->y2 = min(r1->y2, r2->y2);
|
|
|
|
return drm_rect_visible(r1);
|
|
}
|
|
EXPORT_SYMBOL(drm_rect_intersect);
|
|
|
|
/**
|
|
* drm_rect_clip_scaled - perform a scaled clip operation
|
|
* @src: source window rectangle
|
|
* @dst: destination window rectangle
|
|
* @clip: clip rectangle
|
|
* @hscale: horizontal scaling factor
|
|
* @vscale: vertical scaling factor
|
|
*
|
|
* Clip rectangle @dst by rectangle @clip. Clip rectangle @src by the
|
|
* same amounts multiplied by @hscale and @vscale.
|
|
*
|
|
* RETURNS:
|
|
* %true if rectangle @dst is still visible after being clipped,
|
|
* %false otherwise
|
|
*/
|
|
bool drm_rect_clip_scaled(struct drm_rect *src, struct drm_rect *dst,
|
|
const struct drm_rect *clip,
|
|
int hscale, int vscale)
|
|
{
|
|
int diff;
|
|
|
|
diff = clip->x1 - dst->x1;
|
|
if (diff > 0) {
|
|
int64_t tmp = src->x1 + (int64_t) diff * hscale;
|
|
src->x1 = clamp_t(int64_t, tmp, INT_MIN, INT_MAX);
|
|
}
|
|
diff = clip->y1 - dst->y1;
|
|
if (diff > 0) {
|
|
int64_t tmp = src->y1 + (int64_t) diff * vscale;
|
|
src->y1 = clamp_t(int64_t, tmp, INT_MIN, INT_MAX);
|
|
}
|
|
diff = dst->x2 - clip->x2;
|
|
if (diff > 0) {
|
|
int64_t tmp = src->x2 - (int64_t) diff * hscale;
|
|
src->x2 = clamp_t(int64_t, tmp, INT_MIN, INT_MAX);
|
|
}
|
|
diff = dst->y2 - clip->y2;
|
|
if (diff > 0) {
|
|
int64_t tmp = src->y2 - (int64_t) diff * vscale;
|
|
src->y2 = clamp_t(int64_t, tmp, INT_MIN, INT_MAX);
|
|
}
|
|
|
|
return drm_rect_intersect(dst, clip);
|
|
}
|
|
EXPORT_SYMBOL(drm_rect_clip_scaled);
|
|
|
|
static int drm_calc_scale(int src, int dst)
|
|
{
|
|
int scale = 0;
|
|
|
|
if (WARN_ON(src < 0 || dst < 0))
|
|
return -EINVAL;
|
|
|
|
if (dst == 0)
|
|
return 0;
|
|
|
|
scale = src / dst;
|
|
|
|
return scale;
|
|
}
|
|
|
|
/**
|
|
* drm_rect_calc_hscale - calculate the horizontal scaling factor
|
|
* @src: source window rectangle
|
|
* @dst: destination window rectangle
|
|
* @min_hscale: minimum allowed horizontal scaling factor
|
|
* @max_hscale: maximum allowed horizontal scaling factor
|
|
*
|
|
* Calculate the horizontal scaling factor as
|
|
* (@src width) / (@dst width).
|
|
*
|
|
* RETURNS:
|
|
* The horizontal scaling factor, or errno of out of limits.
|
|
*/
|
|
int drm_rect_calc_hscale(const struct drm_rect *src,
|
|
const struct drm_rect *dst,
|
|
int min_hscale, int max_hscale)
|
|
{
|
|
int src_w = drm_rect_width(src);
|
|
int dst_w = drm_rect_width(dst);
|
|
int hscale = drm_calc_scale(src_w, dst_w);
|
|
|
|
if (hscale < 0 || dst_w == 0)
|
|
return hscale;
|
|
|
|
if (hscale < min_hscale || hscale > max_hscale)
|
|
return -ERANGE;
|
|
|
|
return hscale;
|
|
}
|
|
EXPORT_SYMBOL(drm_rect_calc_hscale);
|
|
|
|
/**
|
|
* drm_rect_calc_vscale - calculate the vertical scaling factor
|
|
* @src: source window rectangle
|
|
* @dst: destination window rectangle
|
|
* @min_vscale: minimum allowed vertical scaling factor
|
|
* @max_vscale: maximum allowed vertical scaling factor
|
|
*
|
|
* Calculate the vertical scaling factor as
|
|
* (@src height) / (@dst height).
|
|
*
|
|
* RETURNS:
|
|
* The vertical scaling factor, or errno of out of limits.
|
|
*/
|
|
int drm_rect_calc_vscale(const struct drm_rect *src,
|
|
const struct drm_rect *dst,
|
|
int min_vscale, int max_vscale)
|
|
{
|
|
int src_h = drm_rect_height(src);
|
|
int dst_h = drm_rect_height(dst);
|
|
int vscale = drm_calc_scale(src_h, dst_h);
|
|
|
|
if (vscale < 0 || dst_h == 0)
|
|
return vscale;
|
|
|
|
if (vscale < min_vscale || vscale > max_vscale)
|
|
return -ERANGE;
|
|
|
|
return vscale;
|
|
}
|
|
EXPORT_SYMBOL(drm_rect_calc_vscale);
|
|
|
|
/**
|
|
* drm_calc_hscale_relaxed - calculate the horizontal scaling factor
|
|
* @src: source window rectangle
|
|
* @dst: destination window rectangle
|
|
* @min_hscale: minimum allowed horizontal scaling factor
|
|
* @max_hscale: maximum allowed horizontal scaling factor
|
|
*
|
|
* Calculate the horizontal scaling factor as
|
|
* (@src width) / (@dst width).
|
|
*
|
|
* If the calculated scaling factor is below @min_vscale,
|
|
* decrease the height of rectangle @dst to compensate.
|
|
*
|
|
* If the calculated scaling factor is above @max_vscale,
|
|
* decrease the height of rectangle @src to compensate.
|
|
*
|
|
* RETURNS:
|
|
* The horizontal scaling factor.
|
|
*/
|
|
int drm_rect_calc_hscale_relaxed(struct drm_rect *src,
|
|
struct drm_rect *dst,
|
|
int min_hscale, int max_hscale)
|
|
{
|
|
int src_w = drm_rect_width(src);
|
|
int dst_w = drm_rect_width(dst);
|
|
int hscale = drm_calc_scale(src_w, dst_w);
|
|
|
|
if (hscale < 0 || dst_w == 0)
|
|
return hscale;
|
|
|
|
if (hscale < min_hscale) {
|
|
int max_dst_w = src_w / min_hscale;
|
|
|
|
drm_rect_adjust_size(dst, max_dst_w - dst_w, 0);
|
|
|
|
return min_hscale;
|
|
}
|
|
|
|
if (hscale > max_hscale) {
|
|
int max_src_w = dst_w * max_hscale;
|
|
|
|
drm_rect_adjust_size(src, max_src_w - src_w, 0);
|
|
|
|
return max_hscale;
|
|
}
|
|
|
|
return hscale;
|
|
}
|
|
EXPORT_SYMBOL(drm_rect_calc_hscale_relaxed);
|
|
|
|
/**
|
|
* drm_rect_calc_vscale_relaxed - calculate the vertical scaling factor
|
|
* @src: source window rectangle
|
|
* @dst: destination window rectangle
|
|
* @min_vscale: minimum allowed vertical scaling factor
|
|
* @max_vscale: maximum allowed vertical scaling factor
|
|
*
|
|
* Calculate the vertical scaling factor as
|
|
* (@src height) / (@dst height).
|
|
*
|
|
* If the calculated scaling factor is below @min_vscale,
|
|
* decrease the height of rectangle @dst to compensate.
|
|
*
|
|
* If the calculated scaling factor is above @max_vscale,
|
|
* decrease the height of rectangle @src to compensate.
|
|
*
|
|
* RETURNS:
|
|
* The vertical scaling factor.
|
|
*/
|
|
int drm_rect_calc_vscale_relaxed(struct drm_rect *src,
|
|
struct drm_rect *dst,
|
|
int min_vscale, int max_vscale)
|
|
{
|
|
int src_h = drm_rect_height(src);
|
|
int dst_h = drm_rect_height(dst);
|
|
int vscale = drm_calc_scale(src_h, dst_h);
|
|
|
|
if (vscale < 0 || dst_h == 0)
|
|
return vscale;
|
|
|
|
if (vscale < min_vscale) {
|
|
int max_dst_h = src_h / min_vscale;
|
|
|
|
drm_rect_adjust_size(dst, 0, max_dst_h - dst_h);
|
|
|
|
return min_vscale;
|
|
}
|
|
|
|
if (vscale > max_vscale) {
|
|
int max_src_h = dst_h * max_vscale;
|
|
|
|
drm_rect_adjust_size(src, 0, max_src_h - src_h);
|
|
|
|
return max_vscale;
|
|
}
|
|
|
|
return vscale;
|
|
}
|
|
EXPORT_SYMBOL(drm_rect_calc_vscale_relaxed);
|
|
|
|
/**
|
|
* drm_rect_debug_print - print the rectangle information
|
|
* @prefix: prefix string
|
|
* @r: rectangle to print
|
|
* @fixed_point: rectangle is in 16.16 fixed point format
|
|
*/
|
|
void drm_rect_debug_print(const char *prefix, const struct drm_rect *r, bool fixed_point)
|
|
{
|
|
if (fixed_point)
|
|
DRM_DEBUG_KMS("%s" DRM_RECT_FP_FMT "\n", prefix, DRM_RECT_FP_ARG(r));
|
|
else
|
|
DRM_DEBUG_KMS("%s" DRM_RECT_FMT "\n", prefix, DRM_RECT_ARG(r));
|
|
}
|
|
EXPORT_SYMBOL(drm_rect_debug_print);
|
|
|
|
/**
|
|
* drm_rect_rotate - Rotate the rectangle
|
|
* @r: rectangle to be rotated
|
|
* @width: Width of the coordinate space
|
|
* @height: Height of the coordinate space
|
|
* @rotation: Transformation to be applied
|
|
*
|
|
* Apply @rotation to the coordinates of rectangle @r.
|
|
*
|
|
* @width and @height combined with @rotation define
|
|
* the location of the new origin.
|
|
*
|
|
* @width correcsponds to the horizontal and @height
|
|
* to the vertical axis of the untransformed coordinate
|
|
* space.
|
|
*/
|
|
void drm_rect_rotate(struct drm_rect *r,
|
|
int width, int height,
|
|
unsigned int rotation)
|
|
{
|
|
struct drm_rect tmp;
|
|
|
|
if (rotation & (DRM_REFLECT_X | DRM_REFLECT_Y)) {
|
|
tmp = *r;
|
|
|
|
if (rotation & DRM_REFLECT_X) {
|
|
r->x1 = width - tmp.x2;
|
|
r->x2 = width - tmp.x1;
|
|
}
|
|
|
|
if (rotation & DRM_REFLECT_Y) {
|
|
r->y1 = height - tmp.y2;
|
|
r->y2 = height - tmp.y1;
|
|
}
|
|
}
|
|
|
|
switch (rotation & DRM_ROTATE_MASK) {
|
|
case DRM_ROTATE_0:
|
|
break;
|
|
case DRM_ROTATE_90:
|
|
tmp = *r;
|
|
r->x1 = tmp.y1;
|
|
r->x2 = tmp.y2;
|
|
r->y1 = width - tmp.x2;
|
|
r->y2 = width - tmp.x1;
|
|
break;
|
|
case DRM_ROTATE_180:
|
|
tmp = *r;
|
|
r->x1 = width - tmp.x2;
|
|
r->x2 = width - tmp.x1;
|
|
r->y1 = height - tmp.y2;
|
|
r->y2 = height - tmp.y1;
|
|
break;
|
|
case DRM_ROTATE_270:
|
|
tmp = *r;
|
|
r->x1 = height - tmp.y2;
|
|
r->x2 = height - tmp.y1;
|
|
r->y1 = tmp.x1;
|
|
r->y2 = tmp.x2;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_rect_rotate);
|
|
|
|
/**
|
|
* drm_rect_rotate_inv - Inverse rotate the rectangle
|
|
* @r: rectangle to be rotated
|
|
* @width: Width of the coordinate space
|
|
* @height: Height of the coordinate space
|
|
* @rotation: Transformation whose inverse is to be applied
|
|
*
|
|
* Apply the inverse of @rotation to the coordinates
|
|
* of rectangle @r.
|
|
*
|
|
* @width and @height combined with @rotation define
|
|
* the location of the new origin.
|
|
*
|
|
* @width correcsponds to the horizontal and @height
|
|
* to the vertical axis of the original untransformed
|
|
* coordinate space, so that you never have to flip
|
|
* them when doing a rotatation and its inverse.
|
|
* That is, if you do ::
|
|
*
|
|
* drm_rotate(&r, width, height, rotation);
|
|
* drm_rotate_inv(&r, width, height, rotation);
|
|
*
|
|
* you will always get back the original rectangle.
|
|
*/
|
|
void drm_rect_rotate_inv(struct drm_rect *r,
|
|
int width, int height,
|
|
unsigned int rotation)
|
|
{
|
|
struct drm_rect tmp;
|
|
|
|
switch (rotation & DRM_ROTATE_MASK) {
|
|
case DRM_ROTATE_0:
|
|
break;
|
|
case DRM_ROTATE_90:
|
|
tmp = *r;
|
|
r->x1 = width - tmp.y2;
|
|
r->x2 = width - tmp.y1;
|
|
r->y1 = tmp.x1;
|
|
r->y2 = tmp.x2;
|
|
break;
|
|
case DRM_ROTATE_180:
|
|
tmp = *r;
|
|
r->x1 = width - tmp.x2;
|
|
r->x2 = width - tmp.x1;
|
|
r->y1 = height - tmp.y2;
|
|
r->y2 = height - tmp.y1;
|
|
break;
|
|
case DRM_ROTATE_270:
|
|
tmp = *r;
|
|
r->x1 = tmp.y1;
|
|
r->x2 = tmp.y2;
|
|
r->y1 = height - tmp.x2;
|
|
r->y2 = height - tmp.x1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (rotation & (DRM_REFLECT_X | DRM_REFLECT_Y)) {
|
|
tmp = *r;
|
|
|
|
if (rotation & DRM_REFLECT_X) {
|
|
r->x1 = width - tmp.x2;
|
|
r->x2 = width - tmp.x1;
|
|
}
|
|
|
|
if (rotation & DRM_REFLECT_Y) {
|
|
r->y1 = height - tmp.y2;
|
|
r->y2 = height - tmp.y1;
|
|
}
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(drm_rect_rotate_inv);
|