jpeg pushed a commit to branch master.
http://git.enlightenment.org/core/efl.git/commit/?id=53d3cb4fec32d7876aba1c878501fe7ca9e06c46
commit 53d3cb4fec32d7876aba1c878501fe7ca9e06c46
Author: Jean-Philippe Andre <jp.an...@samsung.com>
Date: Wed Mar 4 16:37:20 2015 +0900
Evas GL common: Improve quality of miniature image
Sample in the middle of the "macro pixels" and fool around with the
borders (usually used to limit linear sampling artifacts) to improve
image quality on the edges.
Those miniatures are still 16x16 but MAAAYYYYYBE they will look a bit
less awful.
NOTE: The first row still doesn't scale properly (interpolates with
garbage above y=0).
---
.../evas/engines/gl_common/evas_gl_texture.c | 51 ++++++++++++++++++----
1 file changed, 43 insertions(+), 8 deletions(-)
diff --git a/src/modules/evas/engines/gl_common/evas_gl_texture.c
b/src/modules/evas/engines/gl_common/evas_gl_texture.c
index 2f3852f..6c3b034 100644
--- a/src/modules/evas/engines/gl_common/evas_gl_texture.c
+++ b/src/modules/evas/engines/gl_common/evas_gl_texture.c
@@ -1283,26 +1283,61 @@ evas_gl_common_texture_update(Evas_GL_Texture *tex,
RGBA_Image *im)
out = alloca(bytes_count * EVAS_GL_TILE_SIZE * EVAS_GL_TILE_SIZE);
xstep = (float)tex->w / (EVAS_GL_TILE_SIZE - 2);
- ystep = (float)tex->h / (EVAS_GL_TILE_SIZE - 1);
+ ystep = (float)tex->h / (EVAS_GL_TILE_SIZE - 2);
in = im->image.data8;
- for (y = 0, j = 0; j < EVAS_GL_TILE_SIZE - 1; y += ystep, j++)
+ // top-left
+ memcpy(&out[0],
+ &in[0],
+ bytes_count);
+
+ // top
+ for (x = xstep * 0.5f, i = 1; i < EVAS_GL_TILE_SIZE - 1; x += xstep,
i++)
+ {
+ memcpy(&out[i * bytes_count],
+ &in[(int)x * bytes_count],
+ bytes_count);
+ }
+
+ // top-right
+ memcpy(&out[((EVAS_GL_TILE_SIZE - 1) * bytes_count)],
+ &in[(im->cache_entry.w - 1) * bytes_count],
+ bytes_count);
+
+ for (y = ystep * 0.5f, j = 1; j < EVAS_GL_TILE_SIZE - 1; y += ystep,
j++)
{
+ // left
memcpy(&out[j * EVAS_GL_TILE_SIZE * bytes_count],
- &in[(int)y * im->cache_entry.w * bytes_count],
+ &in[((int)y * im->cache_entry.w) * bytes_count],
bytes_count);
- for (x = 0, i = 1; i < EVAS_GL_TILE_SIZE - 1; x += xstep, i++)
+ // middle
+ for (x = xstep * 0.5f, i = 1; i < EVAS_GL_TILE_SIZE - 1; x +=
xstep, i++)
memcpy(&out[(j * EVAS_GL_TILE_SIZE + i) * bytes_count],
- &in[((int)y * im->cache_entry.w + (int)x) * bytes_count],
+ &in[(((int)y * im->cache_entry.w) + (int)x) *
bytes_count],
bytes_count);
+ // right
memcpy(&out[(j * EVAS_GL_TILE_SIZE + i) * bytes_count],
- &in[((int)y * im->cache_entry.w + (int)(x - xstep)) *
bytes_count],
+ &in[(((int)y * im->cache_entry.w) + (im->cache_entry.w -
1)) * bytes_count],
bytes_count);
}
+ // bottom-left
memcpy(&out[(j * EVAS_GL_TILE_SIZE) * bytes_count],
- &out[((j - 1) * EVAS_GL_TILE_SIZE) * bytes_count],
- EVAS_GL_TILE_SIZE * bytes_count);
+ &in[((im->cache_entry.w * (im->cache_entry.h - 1)) + 1) *
bytes_count],
+ bytes_count);
+
+ // bottom
+ for (x = xstep * 0.5f, i = 1; i < EVAS_GL_TILE_SIZE - 1; x += xstep,
i++)
+ {
+ memcpy(&out[((EVAS_GL_TILE_SIZE * j) + i) * bytes_count],
+ &in[((int)x + im->cache_entry.w * (im->cache_entry.h - 1))
* bytes_count],
+ bytes_count);
+ }
+
+ // bottom-right
+ memcpy(&out[((EVAS_GL_TILE_SIZE * EVAS_GL_TILE_SIZE) - 1) *
bytes_count],
+ &in[((im->cache_entry.w * im->cache_entry.h) - 1) *
bytes_count],
+ bytes_count);
// out is a miniature of the texture, upload that now and schedule the
data for later.
--
