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Message-ID: <20240709084458.158659-2-jfalempe@redhat.com>
Date: Tue, 9 Jul 2024 10:40:07 +0200
From: Jocelyn Falempe <jfalempe@...hat.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Miguel Ojeda <ojeda@...nel.org>,
Alex Gaynor <alex.gaynor@...il.com>,
Wedson Almeida Filho <wedsonaf@...il.com>,
Boqun Feng <boqun.feng@...il.com>,
Gary Guo <gary@...yguo.net>,
"Bjorn Roy Baron" <bjorn3_gh@...tonmail.com>,
Benno Lossin <benno.lossin@...ton.me>,
Andreas Hindborg <a.hindborg@...sung.com>,
Alice Ryhl <aliceryhl@...gle.com>,
linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org,
rust-for-linux@...r.kernel.org,
Danilo Krummrich <dakr@...hat.com>
Cc: Jocelyn Falempe <jfalempe@...hat.com>
Subject: [PATCH v2 1/4] drm/panic: Add integer scaling to blit()
Add a parameter to the blit function, to upscale the image.
This is necessary to draw QR-code, otherwise, the pixels are usually
too small to be readable by most QR-code reader.
It can also be used later for drawing fonts on high-DPI display.
Signed-off-by: Jocelyn Falempe <jfalempe@...hat.com>
---
drivers/gpu/drm/drm_panic.c | 33 +++++++++++++++++++--------------
1 file changed, 19 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c
index 948aed00595e..fb8c823b7c00 100644
--- a/drivers/gpu/drm/drm_panic.c
+++ b/drivers/gpu/drm/drm_panic.c
@@ -249,20 +249,20 @@ static bool drm_panic_is_pixel_fg(const u8 *sbuf8, unsigned int spitch, int x, i
static void drm_panic_blit16(struct iosys_map *dmap, unsigned int dpitch,
const u8 *sbuf8, unsigned int spitch,
unsigned int height, unsigned int width,
- u16 fg16)
+ unsigned int scale, u16 fg16)
{
unsigned int y, x;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
- if (drm_panic_is_pixel_fg(sbuf8, spitch, x, y))
+ if (drm_panic_is_pixel_fg(sbuf8, spitch, x / scale, y / scale))
iosys_map_wr(dmap, y * dpitch + x * sizeof(u16), u16, fg16);
}
static void drm_panic_blit24(struct iosys_map *dmap, unsigned int dpitch,
const u8 *sbuf8, unsigned int spitch,
unsigned int height, unsigned int width,
- u32 fg32)
+ unsigned int scale, u32 fg32)
{
unsigned int y, x;
@@ -270,7 +270,7 @@ static void drm_panic_blit24(struct iosys_map *dmap, unsigned int dpitch,
for (x = 0; x < width; x++) {
u32 off = y * dpitch + x * 3;
- if (drm_panic_is_pixel_fg(sbuf8, spitch, x, y)) {
+ if (drm_panic_is_pixel_fg(sbuf8, spitch, x / scale, y / scale)) {
/* write blue-green-red to output in little endianness */
iosys_map_wr(dmap, off, u8, (fg32 & 0x000000FF) >> 0);
iosys_map_wr(dmap, off + 1, u8, (fg32 & 0x0000FF00) >> 8);
@@ -283,24 +283,25 @@ static void drm_panic_blit24(struct iosys_map *dmap, unsigned int dpitch,
static void drm_panic_blit32(struct iosys_map *dmap, unsigned int dpitch,
const u8 *sbuf8, unsigned int spitch,
unsigned int height, unsigned int width,
- u32 fg32)
+ unsigned int scale, u32 fg32)
{
unsigned int y, x;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
- if (drm_panic_is_pixel_fg(sbuf8, spitch, x, y))
+ if (drm_panic_is_pixel_fg(sbuf8, spitch, x / scale, y / scale))
iosys_map_wr(dmap, y * dpitch + x * sizeof(u32), u32, fg32);
}
static void drm_panic_blit_pixel(struct drm_scanout_buffer *sb, struct drm_rect *clip,
- const u8 *sbuf8, unsigned int spitch, u32 fg_color)
+ const u8 *sbuf8, unsigned int spitch, unsigned int scale,
+ u32 fg_color)
{
unsigned int y, x;
for (y = 0; y < drm_rect_height(clip); y++)
for (x = 0; x < drm_rect_width(clip); x++)
- if (drm_panic_is_pixel_fg(sbuf8, spitch, x, y))
+ if (drm_panic_is_pixel_fg(sbuf8, spitch, x / scale, y / scale))
sb->set_pixel(sb, clip->x1 + x, clip->y1 + y, fg_color);
}
@@ -310,18 +311,22 @@ static void drm_panic_blit_pixel(struct drm_scanout_buffer *sb, struct drm_rect
* @clip: destination rectangle
* @sbuf8: source buffer, in monochrome format, 8 pixels per byte.
* @spitch: source pitch in bytes
+ * @scale: integer scale, source buffer is scale time smaller than destination
+ * rectangle
* @fg_color: foreground color, in destination format
*
* This can be used to draw a font character, which is a monochrome image, to a
* framebuffer in other supported format.
*/
static void drm_panic_blit(struct drm_scanout_buffer *sb, struct drm_rect *clip,
- const u8 *sbuf8, unsigned int spitch, u32 fg_color)
+ const u8 *sbuf8, unsigned int spitch,
+ unsigned int scale, u32 fg_color)
+
{
struct iosys_map map;
if (sb->set_pixel)
- return drm_panic_blit_pixel(sb, clip, sbuf8, spitch, fg_color);
+ return drm_panic_blit_pixel(sb, clip, sbuf8, spitch, scale, fg_color);
map = sb->map[0];
iosys_map_incr(&map, clip->y1 * sb->pitch[0] + clip->x1 * sb->format->cpp[0]);
@@ -329,15 +334,15 @@ static void drm_panic_blit(struct drm_scanout_buffer *sb, struct drm_rect *clip,
switch (sb->format->cpp[0]) {
case 2:
drm_panic_blit16(&map, sb->pitch[0], sbuf8, spitch,
- drm_rect_height(clip), drm_rect_width(clip), fg_color);
+ drm_rect_height(clip), drm_rect_width(clip), scale, fg_color);
break;
case 3:
drm_panic_blit24(&map, sb->pitch[0], sbuf8, spitch,
- drm_rect_height(clip), drm_rect_width(clip), fg_color);
+ drm_rect_height(clip), drm_rect_width(clip), scale, fg_color);
break;
case 4:
drm_panic_blit32(&map, sb->pitch[0], sbuf8, spitch,
- drm_rect_height(clip), drm_rect_width(clip), fg_color);
+ drm_rect_height(clip), drm_rect_width(clip), scale, fg_color);
break;
default:
WARN_ONCE(1, "Can't blit with pixel width %d\n", sb->format->cpp[0]);
@@ -477,7 +482,7 @@ static void draw_txt_rectangle(struct drm_scanout_buffer *sb,
for (j = 0; j < line_len; j++) {
src = get_char_bitmap(font, msg[i].txt[j], font_pitch);
rec.x2 = rec.x1 + font->width;
- drm_panic_blit(sb, &rec, src, font_pitch, color);
+ drm_panic_blit(sb, &rec, src, font_pitch, 1, color);
rec.x1 += font->width;
}
}
--
2.45.2
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