Started on a fix for cogl (just adding the decomp without changing the hashes) and almost got it running locally on top of latest master yesterday instead of 22.11. But had a power cut mid-rebuild yesterday and since then Iâve been getting âToo many open filesâ-errors. Not sure if thereâs something messed up with the master branch or something out of whack with my machine, havenât had time for further investigation yet.
The reason the uncompressed hashes differed was probably the patch normalization process.
The raw uncompressed 369589-patch contains
From 78636289b073d67209a20145ef0dc003f2d77db6 Mon Sep 17 00:00:00 2001
From: Sian Cao <yinshuiboy@gmail.com>
Date: Tue, 12 Apr 2016 11:36:51 +0800
Subject: [PATCH 1/2] Add GL_ARB_shader_texture_lod support
The patch is used to do lod biased texturing. I can achieve
faster blurring of images instead of using large blur radius.
---
cogl/cogl-context.h | 1 +
cogl/cogl-glsl-shader.c | 13 +++++++++++--
cogl/cogl-types.h | 3 ++-
cogl/driver/gl/gl/cogl-driver-gl.c | 7 +++++++
4 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/cogl/cogl-context.h b/cogl/cogl-context.h
index 07badeb..261ce49 100644
--- a/cogl/cogl-context.h
+++ b/cogl/cogl-context.h
@@ -290,6 +290,7 @@ typedef enum _CoglFeatureID
COGL_FEATURE_ID_PER_VERTEX_POINT_SIZE,
COGL_FEATURE_ID_TEXTURE_RG,
COGL_FEATURE_ID_BUFFER_AGE,
+ COGL_FEATURE_ID_SHADER_TEXTURE_LOD,
/*< private >*/
_COGL_N_FEATURE_IDS /*< skip >*/
diff --git a/cogl/cogl-glsl-shader.c b/cogl/cogl-glsl-shader.c
index 196e0c7..4fb0eb5 100644
--- a/cogl/cogl-glsl-shader.c
+++ b/cogl/cogl-glsl-shader.c
@@ -87,8 +87,8 @@ _cogl_glsl_shader_set_source_with_boilerplate (CoglContext *ctx,
const char *vertex_boilerplate;
const char *fragment_boilerplate;
- const char **strings = g_alloca (sizeof (char *) * (count_in + 4));
- GLint *lengths = g_alloca (sizeof (GLint) * (count_in + 4));
+ const char **strings = g_alloca (sizeof (char *) * (count_in + 5));
+ GLint *lengths = g_alloca (sizeof (GLint) * (count_in + 5));
char *version_string;
int count = 0;
@@ -111,6 +111,15 @@ _cogl_glsl_shader_set_source_with_boilerplate (CoglContext *ctx,
lengths[count++] = sizeof (texture_3d_extension) - 1;
}
+ if (_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_GL_PROGRAMMABLE) &&
+ cogl_has_feature (ctx, COGL_FEATURE_ID_SHADER_TEXTURE_LOD))
+ {
+ static const char shader_texture_lod_ext[] =
+ "#extension GL_ARB_shader_texture_lod : enable\n";
+ strings[count] = shader_texture_lod_ext;
+ lengths[count++] = sizeof (shader_texture_lod_ext) - 1;
+ }
+
if (shader_gl_type == GL_VERTEX_SHADER)
{
strings[count] = vertex_boilerplate;
diff --git a/cogl/cogl-types.h b/cogl/cogl-types.h
index 6accf8d..77964c6 100644
--- a/cogl/cogl-types.h
+++ b/cogl/cogl-types.h
@@ -470,7 +470,8 @@ typedef enum
COGL_FEATURE_MAP_BUFFER_FOR_READ = (1 << 21),
COGL_FEATURE_MAP_BUFFER_FOR_WRITE = (1 << 22),
COGL_FEATURE_ONSCREEN_MULTIPLE = (1 << 23),
- COGL_FEATURE_DEPTH_TEXTURE = (1 << 24)
+ COGL_FEATURE_DEPTH_TEXTURE = (1 << 24),
+ COGL_FEATURE_SHADER_TEXTURE_LOD = (1 << 25)
} CoglFeatureFlags;
/**
diff --git a/cogl/driver/gl/gl/cogl-driver-gl.c b/cogl/driver/gl/gl/cogl-driver-gl.c
index 716d1dd..f305b6a 100644
--- a/cogl/driver/gl/gl/cogl-driver-gl.c
+++ b/cogl/driver/gl/gl/cogl-driver-gl.c
@@ -568,6 +568,13 @@ _cogl_driver_update_features (CoglContext *ctx,
COGL_FEATURE_ID_TEXTURE_RECTANGLE, TRUE);
}
+ if (_cogl_check_extension ("GL_ARB_shader_texture_lod", gl_extensions))
+ {
+ flags |= COGL_FEATURE_SHADER_TEXTURE_LOD;
+ COGL_FLAGS_SET (ctx->features,
+ COGL_FEATURE_ID_SHADER_TEXTURE_LOD, TRUE);
+ }
+
if (ctx->glTexImage3D)
{
flags |= COGL_FEATURE_TEXTURE_3D;
--
2.9.5
While the normalized(?) version contains
--- a/cogl/cogl-context.h
+++ b/cogl/cogl-context.h
@@ -290,6 +290,7 @@
COGL_FEATURE_ID_PER_VERTEX_POINT_SIZE,
COGL_FEATURE_ID_TEXTURE_RG,
COGL_FEATURE_ID_BUFFER_AGE,
+ COGL_FEATURE_ID_SHADER_TEXTURE_LOD,
/*< private >*/
_COGL_N_FEATURE_IDS /*< skip >*/
--- a/cogl/cogl-glsl-shader.c
+++ b/cogl/cogl-glsl-shader.c
@@ -87,8 +87,8 @@
const char *vertex_boilerplate;
const char *fragment_boilerplate;
- const char **strings = g_alloca (sizeof (char *) * (count_in + 4));
- GLint *lengths = g_alloca (sizeof (GLint) * (count_in + 4));
+ const char **strings = g_alloca (sizeof (char *) * (count_in + 5));
+ GLint *lengths = g_alloca (sizeof (GLint) * (count_in + 5));
char *version_string;
int count = 0;
@@ -111,6 +111,15 @@
lengths[count++] = sizeof (texture_3d_extension) - 1;
}
+ if (_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_GL_PROGRAMMABLE) &&
+ cogl_has_feature (ctx, COGL_FEATURE_ID_SHADER_TEXTURE_LOD))
+ {
+ static const char shader_texture_lod_ext[] =
+ "#extension GL_ARB_shader_texture_lod : enable\n";
+ strings[count] = shader_texture_lod_ext;
+ lengths[count++] = sizeof (shader_texture_lod_ext) - 1;
+ }
+
if (shader_gl_type == GL_VERTEX_SHADER)
{
strings[count] = vertex_boilerplate;
--- a/cogl/cogl-types.h
+++ b/cogl/cogl-types.h
@@ -470,7 +470,8 @@
COGL_FEATURE_MAP_BUFFER_FOR_READ = (1 << 21),
COGL_FEATURE_MAP_BUFFER_FOR_WRITE = (1 << 22),
COGL_FEATURE_ONSCREEN_MULTIPLE = (1 << 23),
- COGL_FEATURE_DEPTH_TEXTURE = (1 << 24)
+ COGL_FEATURE_DEPTH_TEXTURE = (1 << 24),
+ COGL_FEATURE_SHADER_TEXTURE_LOD = (1 << 25)
} CoglFeatureFlags;
/**
--- a/cogl/driver/gl/gl/cogl-driver-gl.c
+++ b/cogl/driver/gl/gl/cogl-driver-gl.c
@@ -568,6 +568,13 @@
COGL_FEATURE_ID_TEXTURE_RECTANGLE, TRUE);
}
+ if (_cogl_check_extension ("GL_ARB_shader_texture_lod", gl_extensions))
+ {
+ flags |= COGL_FEATURE_SHADER_TEXTURE_LOD;
+ COGL_FLAGS_SET (ctx->features,
+ COGL_FEATURE_ID_SHADER_TEXTURE_LOD, TRUE);
+ }
+
if (ctx->glTexImage3D)
{
flags |= COGL_FEATURE_TEXTURE_3D;
So thatâs that mystery solved.
Ran the following to find additional cases:
/nixpkgs]$ git grep bugzilla-attachments.gnome.org
pkgs/desktops/gnome-2/platform/gnome-common/default.nix: url = "https://bug697543.bugzilla-attachments.gnome.org/attachment.cgi?id=240935";
pkgs/desktops/gnome/core/gnome-common/default.nix: url = "https://bug697543.bugzilla-attachments.gnome.org/attachment.cgi?id=240935";
pkgs/development/libraries/cogl/default.nix: url = "https://bug787443.bugzilla-attachments.gnome.org/attachment.cgi?id=359589";
pkgs/development/libraries/cogl/default.nix: url = "https://bug787443.bugzilla-attachments.gnome.org/attachment.cgi?id=361056";
pkgs/development/libraries/gtk/2.x.nix: url = "https://bug557780.bugzilla-attachments.gnome.org/attachment.cgi?id=306776";
The first 2 are fetchurl instead of fetchpatch. The 5th one is fetchpatch.
Iâm not yet knowledgeable about how to force (re)building of individual packages/derivations. What Iâve been doing so far is excluding dependent packages from the nixos configuration, then running nix-collect-garbage, then building without cache. I know about nix-store --delete but have had mixed success with it actually allowing removal despite getting rid of linger roots.
Please excuse the verbosity as I document my Nix/NixOS learning adventure. 
