riseproject-dev · luhenry · Sep 22, 2026 · Sep 21, 2026
diff --git a/.github/workflows/build-rawpy.yml b/.github/workflows/build-rawpy.yml
@@ -0,0 +1,151 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+name: Build rawpy wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version glob to (re)build; empty builds every version of docs/packages/rawpy.yaml not released yet'
+        required: false
+        default: ''
+  pull_request:
+    branches: [main]
+    paths:
+      - '.github/workflows/build-rawpy.yml'
+      - 'docs/packages/rawpy.yaml'
+      - 'patches/rawpy/**'
+  push:
+    branches: [main]
+    paths:
+      - '.github/workflows/build-rawpy.yml'
+      - 'docs/packages/rawpy.yaml'
+      - 'patches/rawpy/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+    with:
+      package: rawpy
+      version: ${{ inputs.version }}
+
+  build_wheels:
+    needs: [setup]
+    if: needs.setup.outputs.versions != '[]'
+    name: Build rawpy ${{ matrix.version }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    strategy:
+      fail-fast: false
+      matrix:
+        version: ${{ fromJSON(needs.setup.outputs.versions) }}
+        python: ["cp312", "cp313", "cp314", "cp314t"]
+
+    env:
+      RAWPY_VERSION: ${{ matrix.version }}
+
+    steps:
+      - name: Checkout rawpy v${{ env.RAWPY_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: letmaik/rawpy
+          ref: v${{ env.RAWPY_VERSION }}
+          submodules: true
+          persist-credentials: false
+
+      - name: Checkout python-wheels
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          path: python-wheels
+          persist-credentials: false
+
+      - name: Patch rawpy source
+        run: git apply python-wheels/patches/rawpy/${{ env.RAWPY_VERSION }}/*.patch
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # Rocky 10 riscv64 ships lcms2/jasper directly; its libjpeg-turbo lacks the
+          # JPEG8 ABI (DNG lossy codec) upstream's own build-linux.sh gets by building
+          # from source with -DWITH_JPEG8=ON, so only that one is built the same way
+          # upstream does (riscv64 has no libjpeg-turbo SIMD kernels, hence -DWITH_SIMD=0).
+          CIBW_BEFORE_BUILD: >
+            dnf install -y zlib-ng-compat-devel lcms2-devel jasper-devel &&
+            curl -fsSL -o /tmp/libjpeg-turbo.tar.gz
+            https://github.com/libjpeg-turbo/libjpeg-turbo/releases/download/3.1.3/libjpeg-turbo-3.1.3.tar.gz &&
+            echo "075920b826834ac4ddf97661cc73491047855859affd671d52079c6867c1c6c0  /tmp/libjpeg-turbo.tar.gz" | sha256sum -c - &&
+            tar xzf /tmp/libjpeg-turbo.tar.gz -C /tmp &&
+            cmake -S /tmp/libjpeg-turbo-3.1.3 -B /tmp/libjpeg-turbo-3.1.3/build
+            -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release
+            -DENABLE_SHARED=ON -DENABLE_STATIC=OFF -DWITH_JPEG8=ON -DWITH_SIMD=0 &&
+            cmake --build /tmp/libjpeg-turbo-3.1.3/build -j"$(nproc)" --target install &&
+            rm -f /usr/include/jconfig-32.h /usr/include/jconfig-64.h &&
+            curl -fsSL -o {project}/LICENSE.lcms2 https://raw.githubusercontent.com/mm2/Little-CMS/lcms2.16/LICENSE &&
+            curl -fsSL -o {project}/LICENSE.libjpeg-turbo https://raw.githubusercontent.com/libjpeg-turbo/libjpeg-turbo/3.1.3/LICENSE.md &&
+            curl -fsSL -o {project}/LICENSE.jasper https://raw.githubusercontent.com/jasper-software/jasper/version-4.1.0/LICENSE.txt
+          CIBW_ENVIRONMENT: PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+          CIBW_TEST_ENVIRONMENT: CI=true
+          CIBW_TEST_EXTRAS: test
+          CIBW_TEST_SOURCES: test examples
+          CIBW_TEST_COMMAND: >-
+            python -c "import importlib.metadata as m; names={p.name for p in m.files('rawpy') if '.dist-info/licenses/' in str(p)}; assert names == {'LICENSE','LICENSE.LibRaw','LICENSE.lcms2','LICENSE.libjpeg-turbo','LICENSE.jasper'}, names" &&
+            python -m pytest -v test
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: rawpy-${{ env.RAWPY_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  gpl_sources:
+    name: Collect GPL sources (gcc) for rawpy ${{ matrix.version }}
+    needs: [setup]
+    if: needs.setup.outputs.versions != '[]'
+    runs-on: ubuntu-24.04-riscv
+    strategy:
+      fail-fast: false
+      matrix:
+        version: ${{ fromJSON(needs.setup.outputs.versions) }}
+    steps:
+      - uses: riseproject-dev/python-wheels/actions/collect-gpl-sources@main
+        with:
+          image: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: rawpy-${{ matrix.version }}-gpl-sources
+          path: gpl-sources.tar
+          if-no-files-found: error
+
+  publish:
+    name: Publish rawpy ${{ matrix.version }}
+    needs: [setup, build_wheels, gpl_sources]
+    if: needs.setup.outputs.versions != '[]'
+    strategy:
+      fail-fast: false
+      matrix:
+        version: ${{ fromJSON(needs.setup.outputs.versions) }}
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    secrets:
+      app-private-key: ${{ secrets.RISEPROJECT_APP_PRIVATE_KEY }}
+    with:
+      artifact-pattern: rawpy-${{ matrix.version }}-*-manylinux_riscv64
+      gpl-sources-artifact: rawpy-${{ matrix.version }}-gpl-sources
+      gpl-sources-description: gcc
diff --git a/docs/packages/rawpy.yaml b/docs/packages/rawpy.yaml
@@ -0,0 +1,6 @@
+package-name: rawpy
+source-code: https://github.com/letmaik/rawpy
+license: MIT
+versions:
+- version: 0.27.0
+  patched: true
diff --git a/patches/rawpy/0.27.0/0001-use-schedule-static-for-the-dynamic-and-guided-OpenMP-loops.patch b/patches/rawpy/0.27.0/0001-use-schedule-static-for-the-dynamic-and-guided-OpenMP-loops.patch
@@ -0,0 +1,181 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Ludovic Henry <git@ludovic.dev>
+Date: Mon, 21 Sep 2026 20:00:00 +0000
+Subject: [PATCH] use schedule(static) for the dynamic and guided OpenMP loops
+
+Upstream-Status: Inappropriate [works around a libgomp defect on the riscv64 runners, riseproject-dev/python-wheels#617]
+
+libgomp's dynamic and guided work-share schedules fault on the riscv64
+machines these wheels are built and tested on (see CLAUDE.md gotcha 166).
+copy_fuji_uncropped/copy_bayer in raw2image.cpp run schedule(dynamic) on
+every single postprocess() call regardless of camera or demosaic
+algorithm, and ahd_demosaic.cpp (the default demosaic algorithm) and
+dht_demosaic.cpp (the optional DHT algorithm) run schedule(dynamic)/
+schedule(guided) too, so this is reachable by ordinary decoding, not an
+edge case.
+
+Moving all 16 affected loops in the vendored LibRaw copy to
+schedule(static) costs only load balancing on rows/columns whose
+iterations differ in cost, and buys a wheel that does not crash. Revert
+once the runners' toolchain is fixed.
+---
+ external/LibRaw/src/demosaic/ahd_demosaic.cpp  |  2 +-
+ external/LibRaw/src/demosaic/dht_demosaic.cpp  | 26 +++++++++++++-------------
+ external/LibRaw/src/preprocessing/raw2image.cpp |  4 ++--
+ 3 files changed, 16 insertions(+), 16 deletions(-)
+
+diff --git a/external/LibRaw/src/demosaic/ahd_demosaic.cpp b/external/LibRaw/src/demosaic/ahd_demosaic.cpp
+index ae87b28..ae6ad6d 100644
+--- a/external/LibRaw/src/demosaic/ahd_demosaic.cpp
++++ b/external/LibRaw/src/demosaic/ahd_demosaic.cpp
+@@ -306,7 +306,7 @@ void LibRaw::ahd_interpolate()
+     char** buffers = malloc_omp_buffers(buffer_count, buffer_size);
+
+ #ifdef LIBRAW_USE_OPENMP
+-#pragma omp parallel for schedule(dynamic) default(none) shared(terminate_flag) firstprivate(buffers)
++#pragma omp parallel for schedule(static) default(none) shared(terminate_flag) firstprivate(buffers)
+ #endif
+     for (int top = 2; top < height - 5; top += LIBRAW_AHD_TILE - 6)
+     {
+diff --git a/external/LibRaw/src/demosaic/dht_demosaic.cpp b/external/LibRaw/src/demosaic/dht_demosaic.cpp
+index 9fa603f..b23dc61 100644
+--- a/external/LibRaw/src/demosaic/dht_demosaic.cpp
++++ b/external/LibRaw/src/demosaic/dht_demosaic.cpp
+@@ -259,7 +259,7 @@ void DHT::hide_hots()
+ {
+   int iwidth = libraw.imgdata.sizes.iwidth;
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(guided) firstprivate(iwidth)
++#pragma omp parallel for schedule(static) firstprivate(iwidth)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+@@ -401,7 +401,7 @@ void DHT::restore_hots()
+ #ifdef _MSC_VER
+ #pragma omp parallel for firstprivate(iwidth)
+ #else
+-#pragma omp parallel for schedule(guided) firstprivate(iwidth) collapse(2)
++#pragma omp parallel for schedule(static) firstprivate(iwidth) collapse(2)
+ #endif
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+@@ -423,7 +423,7 @@ void DHT::restore_hots()
+ void DHT::make_diag_dirs()
+ {
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+@@ -442,7 +442,7 @@ void DHT::make_diag_dirs()
+ //		refine_diag_dirs(i, (i & 1) ^ 1);
+ //	}
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+@@ -453,28 +453,28 @@ void DHT::make_diag_dirs()
+ void DHT::make_hv_dirs()
+ {
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+     make_hv_dline(i);
+   }
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+     refine_hv_dirs(i, i & 1);
+   }
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+     refine_hv_dirs(i, (i & 1) ^ 1);
+   }
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+@@ -689,7 +689,7 @@ void DHT::refine_idiag_dirs(int i)
+ void DHT::make_greens()
+ {
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+@@ -765,7 +765,7 @@ void DHT::make_gline(int i)
+ void DHT::illustrate_dirs()
+ {
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+@@ -956,7 +956,7 @@ void DHT::make_rb()
+ {
+ #if defined(LIBRAW_USE_OPENMP)
+ #pragma omp barrier
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+@@ -964,7 +964,7 @@ void DHT::make_rb()
+   }
+ #if defined(LIBRAW_USE_OPENMP)
+ #pragma omp barrier
+-#pragma omp parallel for schedule(guided)
++#pragma omp parallel for schedule(static)
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+   {
+@@ -982,7 +982,7 @@ void DHT::copy_to_image()
+ #ifdef _MSC_VER
+ #pragma omp parallel for
+ #else
+-#pragma omp parallel for schedule(guided) collapse(2)
++#pragma omp parallel for schedule(static) collapse(2)
+ #endif
+ #endif
+   for (int i = 0; i < libraw.imgdata.sizes.iheight; ++i)
+diff --git a/external/LibRaw/src/preprocessing/raw2image.cpp b/external/LibRaw/src/preprocessing/raw2image.cpp
+index e343762..9fd2f1e 100644
+--- a/external/LibRaw/src/preprocessing/raw2image.cpp
++++ b/external/LibRaw/src/preprocessing/raw2image.cpp
+@@ -221,7 +221,7 @@ void LibRaw::copy_fuji_uncropped(unsigned short cblack[4],
+                                  unsigned short *dmaxp)
+ {
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(dynamic) default(none) firstprivate(cblack) shared(dmaxp)
++#pragma omp parallel for schedule(static) default(none) firstprivate(cblack) shared(dmaxp)
+ #endif
+   for (int row = 0; row < int(S.raw_height) - int(S.top_margin) * 2; row++)
+   {
+@@ -276,7 +276,7 @@ void LibRaw::copy_bayer(unsigned short cblack[4], unsigned short *dmaxp)
+   // Both cropped and uncropped
+   int maxHeight = MIN(int(S.height),int(S.raw_height)-int(S.top_margin));
+ #if defined(LIBRAW_USE_OPENMP)
+-#pragma omp parallel for schedule(dynamic) default(none) shared(dmaxp) firstprivate(cblack, maxHeight)
++#pragma omp parallel for schedule(static) default(none) shared(dmaxp) firstprivate(cblack, maxHeight)
+ #endif
+   for (int row = 0; row < maxHeight ; row++)
+   {
+--
+2.43.0