switch to gitea actions

.drone.yml

@@ -1,21 +0,0 @@
-kind: pipeline
-type: docker
-name: default
-
-steps:
-- name: build
-  image: archlinux:latest
-  commands:
-  - pacman -Syu --noconfirm --needed base-devel libvncserver libxkbcommon libdrm libva git cmake clang
-  - export CFLAGS="-pipe -fno-plt -fexceptions -fstack-clash-protection -fcf-protection -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security"
-  - CC=gcc cmake -B gcc-out
-  - cmake --build gcc-out
-  - CC=clang cmake -B clang-out
-  - cmake --build clang-out
-
-trigger:
-  branch:
-  - dev
-  event:
-    exclude:
-    - pull_request

.forgejo/workflows/default.yml

@@ -0,0 +1,27 @@
+name: Build with gcc + clang
+on:
+  push:
+    branches: [dev]
+jobs:
+  build:
+    if: "github.event_name != 'push' || !contains(github.event.head_commit.message, '[skip ci]')"
+    runs-on: docker
+    container:
+      image: archlinux:latest
+    env:
+      CFLAGS: "-pipe -fno-plt -fexceptions -fstack-clash-protection -fcf-protection -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security"
+    steps:
+      - name: Prepare dependencies
+        run: |
+          pacman -Syu --noconfirm --needed nodejs git \
+            base-devel libvncserver libxkbcommon libdrm libva cmake clang
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Build with gcc
+        run: |
+          CC=gcc cmake -B gcc-out
+          cmake --build gcc-out
+      - name: Build with clang
+        run: |
+          CC=clang cmake -B clang-out
+          cmake --build clang-out

CMakeLists.txt

@@ -13,13 +13,37 @@ pkg_search_module(XKBCOMMON REQUIRED xkbcommon)
 pkg_search_module(LIBVA REQUIRED libva)
 pkg_search_module(LIBVA_DRM REQUIRED libva-drm)
 
+add_executable(kmsvnc)
+set(kmsvnc_SOURCES kmsvnc.c drm.c input.c keymap.c va.c drm_master.c)
+
 include(CheckIncludeFiles)
 CHECK_INCLUDE_FILES("linux/uinput.h;linux/dma-buf.h" HAVE_LINUX_API_HEADERS)
 IF(NOT HAVE_LINUX_API_HEADERS)
   message(FATAL_ERROR "linux-api-headers not found")
 ENDIF()
 
-add_executable(kmsvnc kmsvnc.c drm.c input.c keymap.c va.c drm_master.c)
+include(CheckSymbolExists)
+check_symbol_exists(SYS_pidfd_getfd "sys/syscall.h" HAVE_LIBC_SYS_pidfd_getfd)
+IF(NOT HAVE_LIBC_SYS_pidfd_getfd)
+  message(WARNING "pidfd_getfd syscall not found, the --screen-blank options will be disabled")
+  target_compile_options(kmsvnc PUBLIC -DDISABLE_KMSVNC_SCREEN_BLANK)
+  list(REMOVE_ITEM kmsvnc_SOURCES drm_master.c)
+ENDIF()
+include(CMakePushCheckState)
+cmake_push_check_state()
+set(CMAKE_REQUIRED_INCLUDES ${LIBDRM_INCLUDEDIR}/libdrm) # can't do anything about that
+set(CMAKE_REQUIRED_LIBRARIES ${LIBDRM_LIBRARIES})
+check_symbol_exists(drmGetFormatName "xf86drm.h" HAVE_LIBDRM_drmGetFormatName)
+cmake_pop_check_state()
+IF(NOT HAVE_LIBDRM_drmGetFormatName)
+  message(WARNING "drmGetFormatName not found, format name printing will be disabled")
+  target_compile_options(kmsvnc PUBLIC -DDISABLE_KMSVNC_drmGetFormatName)
+ENDIF()
+
+
+target_sources(kmsvnc PUBLIC
+    ${kmsvnc_SOURCES}
+)
 target_include_directories(kmsvnc PUBLIC
   ${LIBDRM_INCLUDEDIR}
   ${LIBDRM_INCLUDEDIR}/libdrm

drm.c

@@ -10,7 +10,25 @@
 
 #include "drm.h"
 #include "va.h"
-#include "drm_master.h"
+
+#ifndef DISABLE_KMSVNC_SCREEN_BLANK
+    #include "drm_master.h"
+#endif
+
+#ifndef fourcc_mod_is_vendor
+    #define fourcc_mod_is_vendor(modifier, vendor) \
+            (fourcc_mod_get_vendor(modifier) == DRM_FORMAT_MOD_VENDOR_## vendor)
+#endif
+#ifdef DISABLE_KMSVNC_drmGetFormatName
+    static char* drmGetFormatName(uint32_t data) {
+        char *name = "missing drmGetFormatName";
+        char *out = malloc(strlen(name)+1);
+        if (out) {
+            memcpy(out, name, strlen(name)+1);
+        }
+        return out;
+    }
+#endif
 
 extern struct kmsvnc_data *kmsvnc;
 
@@ -103,18 +121,8 @@ void convert_intel_x_tiled_kmsbuf(const char *in, int width, int height, char *b
 static void convert_vaapi(const char *in, int width, int height, char *buff) {
     va_hwframe_to_vaapi(buff);
     if (
-        !kmsvnc->va->selected_fmt->byte_order &&
         (KMSVNC_FOURCC_TO_INT('R','G','B',0) & kmsvnc->va->selected_fmt->fourcc) == KMSVNC_FOURCC_TO_INT('R','G','B',0)
     ) {}
-    else if (
-        kmsvnc->va->selected_fmt->byte_order &&
-        (KMSVNC_FOURCC_TO_INT(0,'B','G','R') & kmsvnc->va->selected_fmt->fourcc) == KMSVNC_FOURCC_TO_INT(0,'B','G','R')
-    ) {
-        for (int i = 0; i < width * height * BYTES_PER_PIXEL; i += BYTES_PER_PIXEL) {
-            uint32_t *pixdata = (uint32_t*)(buff + i);
-            *pixdata = __builtin_bswap32(*pixdata);
-        }
-    }
     else {
         // is 30 depth?
         if (kmsvnc->va->selected_fmt->depth == 30) {
@@ -127,8 +135,8 @@ static void convert_vaapi(const char *in, int width, int height, char *buff) {
             }
         }
         else {
-            // handle ihd and mesa byte order quirk
+            // actually, does anyone use this?
-            if (kmsvnc->va->selected_fmt->byte_order) {
+            if (!kmsvnc->va->selected_fmt->byte_order) {
                 for (int i = 0; i < width * height * BYTES_PER_PIXEL; i += BYTES_PER_PIXEL) {
                     uint32_t *pixdata = (uint32_t*)(buff + i);
                     *pixdata = __builtin_bswap32(*pixdata);
@@ -175,6 +183,7 @@ void drm_sync_noop(int drmfd)
 
 void drm_cleanup() {
     if (kmsvnc->drm) {
+#ifndef DISABLE_KMSVNC_SCREEN_BLANK
         if (kmsvnc->drm->gamma && kmsvnc->drm->gamma->size && kmsvnc->drm->gamma->red && kmsvnc->drm->gamma->green && kmsvnc->drm->gamma->blue) {
             if (drmModeCrtcSetGamma(kmsvnc->drm->drm_master_fd ?: kmsvnc->drm->drm_fd, kmsvnc->drm->plane->crtc_id, kmsvnc->drm->gamma->size, kmsvnc->drm->gamma->red, kmsvnc->drm->gamma->green, kmsvnc->drm->gamma->blue)) perror("Failed to restore gamma");
         }
@@ -186,6 +195,7 @@ void drm_cleanup() {
             free(kmsvnc->drm->gamma);
             kmsvnc->drm->gamma = NULL;
         }
+#endif
         if (kmsvnc->drm->drm_ver) {
             drmFreeVersion(kmsvnc->drm->drm_ver);
             kmsvnc->drm->drm_ver = NULL;
@@ -497,6 +507,7 @@ int drm_open() {
     if (!kmsvnc->screen_blank && drmIsMaster(drm->drm_fd)) {
         if (drmDropMaster(drm->drm_fd)) fprintf(stderr, "Failed to drop master");
     }
+#ifndef DISABLE_KMSVNC_SCREEN_BLANK
     if (kmsvnc->screen_blank && !drmIsMaster(drm->drm_fd)) {
         drm->drm_master_fd = drm_get_master_fd();
         drm->drm_master_fd = drm->drm_master_fd > 0 ? drm->drm_master_fd : 0;
@@ -504,6 +515,7 @@ int drm_open() {
             fprintf(stderr, "not master client, master fd %d\n", drm->drm_master_fd);
         }
     }
+#endif
 
     drm->drm_ver = drmGetVersion(drm->drm_fd);
     printf("drm driver is %s\n", drm->drm_ver->name);
@@ -516,6 +528,7 @@ int drm_open() {
 
     if (drm_refresh_planes(1)) return 1;
 
+#ifndef DISABLE_KMSVNC_SCREEN_BLANK
     if (kmsvnc->screen_blank) {
         drm->gamma = malloc(sizeof(struct kmsvnc_drm_gamma_data));
         if (!drm->gamma) KMSVNC_FATAL("memory allocation error at %s:%d\n", __FILE__, __LINE__);
@@ -575,6 +588,7 @@ int drm_open() {
             target_crtc = NULL;
         }
     }
+#endif
 
     drm->mfb = drmModeGetFB2(drm->drm_fd, drm->plane->fb_id);
     if (!drm->mfb) {

kmsvnc.c

@@ -6,6 +6,7 @@
 #include <stdlib.h>
 #include <signal.h>
 #include <time.h>
+#include <unistd.h>
 #include <argp.h>
 #include <arpa/inet.h>
 
@@ -222,7 +223,7 @@ void signal_handler(int signum){
 }
 
 static struct argp_option kmsvnc_main_options[] = {
-    {"device", 'd', "/dev/dri/card0", 0, "DRM device"},
+    {"device", 'd', "/dev/dri/cardX", 0, "DRM device"},
     {"source-plane", 0xfefc, "0", 0, "Use specific plane"},
     {"source-crtc", 0xfefd, "0", 0, "Use specific crtc (to list all crtcs and planes, set this to -1)"},
     {"force-driver", 0xfefe, "i915", 0, "force a certain driver (for debugging)"},
@@ -241,8 +242,11 @@ static struct argp_option kmsvnc_main_options[] = {
     {"input-height", 0xff07, "0", 0, "Explicitly set input height"},
     {"input-offx", 0xff08, "0", 0, "Set input offset of x axis on a multi display system"},
     {"input-offy", 0xff09, "0", 0, "Set input offset of y axis on a multi display system"},
+#ifndef DISABLE_KMSVNC_SCREEN_BLANK
     {"screen-blank", 0xff0a, 0, OPTION_ARG_OPTIONAL, "Blank screen with gamma set on crtc"},
     {"screen-blank-restore-linear", 0xff0b, 0, OPTION_ARG_OPTIONAL, "Restore linear values on exit in case of messed up gamma"},
+#endif
+    {"va-byteorder-swap", 0xff0c, 0, OPTION_ARG_OPTIONAL, "Force swap vaapi image rgb byteorder"},
     {"wakeup", 'w', 0, OPTION_ARG_OPTIONAL, "Move mouse to wake the system up before start"},
     {"disable-input", 'i', 0, OPTION_ARG_OPTIONAL, "Disable uinput"},
     {"desktop-name", 'n', "kmsvnc", 0, "Specify vnc desktop name"},
@@ -360,6 +364,9 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
         case 0xff0b:
             kmsvnc->screen_blank_restore = 1;
             break;
+        case 0xff0c:
+            kmsvnc->va_byteorder_swap = 1;
+            break;
         case 'w':
             kmsvnc->input_wakeup = 1;
             break;
@@ -392,7 +399,10 @@ int main(int argc, char **argv)
 
     kmsvnc->vnc_opt = vncopt;
 
-    kmsvnc->card = "/dev/dri/card0";
+    #define DEVICE_EXAMPLE_MAX_SIZE 15
+    #define DEVICE_EXAMPLE_FALLBACK "/dev/dri/card0"
+    static char device_example[DEVICE_EXAMPLE_MAX_SIZE] = DEVICE_EXAMPLE_FALLBACK;
+    kmsvnc->card = device_example;
     kmsvnc->va_derive_enabled = -1;
     kmsvnc->vnc_opt->bind = &(struct in_addr){0};
     kmsvnc->vnc_opt->always_shared = 1;
@@ -406,6 +416,18 @@ int main(int argc, char **argv)
     struct argp argp = {kmsvnc_main_options, parse_opt, args_doc, doc};
     argp_parse(&argp, argc, argv, 0, 0, NULL);
 
+    if (kmsvnc->card == device_example) {
+        for (int i = 0; i < 10; i++) {
+            snprintf(kmsvnc->card, DEVICE_EXAMPLE_MAX_SIZE, "/dev/dri/card%d", i);
+            if (!access(kmsvnc->card, F_OK)) {
+                break;
+            }
+            else {
+                snprintf(kmsvnc->card, DEVICE_EXAMPLE_MAX_SIZE, DEVICE_EXAMPLE_FALLBACK);
+            }
+        }
+    }
+
     if (!kmsvnc->disable_input) {
         const char* XKB_DEFAULT_LAYOUT = getenv("XKB_DEFAULT_LAYOUT");
         if (!XKB_DEFAULT_LAYOUT || strcmp(XKB_DEFAULT_LAYOUT, "") == 0) {

kmsvnc.h

@@ -45,6 +45,7 @@ struct kmsvnc_data
     int input_offy;
     char screen_blank;
     char screen_blank_restore;
+    char va_byteorder_swap;
     struct kmsvnc_drm_data *drm;
     struct kmsvnc_input_data *input;
     struct kmsvnc_keymap_data *keymap;
@@ -139,6 +140,7 @@ struct kmsvnc_va_data
     VAImageFormat* img_fmts;
     int img_fmt_count;
     VAImageFormat* selected_fmt;
+    const char *vendor_string;
 };
 
 #define KMSVNC_FATAL(...) do{ fprintf(stderr, __VA_ARGS__); return 1; } while(0)

va.c

@@ -6,6 +6,7 @@
 #include <va/va_drm.h>
 #include <va/va_drmcommon.h>
 #include <fcntl.h>
+#include <string.h>
 
 #include "va.h"
 #include "kmsvnc.h"
@@ -38,6 +39,9 @@ void va_cleanup() {
             VA_MAY(vaTerminate(kmsvnc->va->dpy));
             kmsvnc->va->dpy = NULL;
         }
+        if (kmsvnc->va->vendor_string) {
+            kmsvnc->va->vendor_string = NULL;
+        }
         free(kmsvnc->va);
         kmsvnc->va = NULL;
     }
@@ -80,26 +84,17 @@ struct va_fmt_data {
     char is_alpha;
     uint32_t va_rt_format;
     uint32_t depth;
-    uint32_t blue_mask;
-    uint32_t green_mask;
-    uint32_t red_mask;
-    uint32_t byte_order;
 };
 
-static VAImageFormat* vaImgFmt_from_vaFmtData(struct va_fmt_data* data) {
+static VAImageFormat* vaImgFmt_apply_quirks(struct va_fmt_data* data) {
     static VAImageFormat ret = {0};
-    VAImageFormat fmt = {
+    memcpy(&ret, data->fmt, sizeof(VAImageFormat));
-        .fourcc = data->va_fourcc,
+    if ((kmsvnc->va_byteorder_swap ^ !strncmp(kmsvnc->va->vendor_string, "Mesa", 4)) && data->depth != 30) {
-        .byte_order = data->byte_order,
+        printf("applying rgb mask byte order swap\n");
-        .bits_per_pixel = 32,
+        ret.blue_mask = __builtin_bswap32(data->fmt->blue_mask);
-        .depth = data->depth,
+        ret.green_mask = __builtin_bswap32(data->fmt->green_mask);
-        .blue_mask = data->blue_mask,
+        ret.red_mask = __builtin_bswap32(data->fmt->red_mask);
-        .green_mask = data->green_mask,
+    }
-        .red_mask = data->red_mask,
-        .alpha_mask = 0,
-        .va_reserved = {0}
-    };
-    memcpy(&ret, &fmt, sizeof(VAImageFormat));
     return &ret;
 }
 
@@ -126,6 +121,7 @@ int va_init() {
     }
 
     setenv("DISPLAY", "", 1);
+    setenv("WAYLAND_DISPLAY", "", 1);
 
     struct kmsvnc_va_data *va = malloc(sizeof(struct kmsvnc_va_data));
     if (!va) KMSVNC_FATAL("memory allocation error at %s:%d\n", __FILE__, __LINE__);
@@ -161,8 +157,8 @@ int va_init() {
     VAStatus status;
     VA_MUST(vaInitialize(va->dpy, &major, &minor));
 
-    const char *vendor_string = vaQueryVendorString(va->dpy);
+    va->vendor_string = vaQueryVendorString(va->dpy);
-    printf("vaapi vendor %s\n", vendor_string);
+    printf("vaapi vendor %s\n", va->vendor_string);
 
     VADRMPRIMESurfaceDescriptor prime_desc;
     VASurfaceAttrib prime_attrs[2] = {
@@ -291,45 +287,29 @@ int va_init() {
     }
 
     struct va_fmt_data format_to_try[] = {
-        {KMSVNC_FOURCC_TO_INT('R','G','B','X'), NULL, 0, VA_RT_FORMAT_RGB32, 24, 0xff00, 0xff0000, 0xff000000, 0},
+        {KMSVNC_FOURCC_TO_INT('R','G','B','X'), NULL, 0, VA_RT_FORMAT_RGB32, 24},
-        {KMSVNC_FOURCC_TO_INT('R','G','B','A'), NULL, 1, VA_RT_FORMAT_RGB32, 32, 0xff00, 0xff0000, 0xff000000, 0},
+        {KMSVNC_FOURCC_TO_INT('R','G','B','A'), NULL, 1, VA_RT_FORMAT_RGB32, 32},
 
-        {KMSVNC_FOURCC_TO_INT('X','B','G','R'), NULL, 0, VA_RT_FORMAT_RGB32, 24, 0xff0000, 0xff00, 0xff, 0},
+        {KMSVNC_FOURCC_TO_INT('X','B','G','R'), NULL, 0, VA_RT_FORMAT_RGB32, 24},
-        {KMSVNC_FOURCC_TO_INT('A','B','G','R'), NULL, 1, VA_RT_FORMAT_RGB32, 32, 0xff0000, 0xff00, 0xff, 0},
+        {KMSVNC_FOURCC_TO_INT('A','B','G','R'), NULL, 1, VA_RT_FORMAT_RGB32, 32},
 
-        {KMSVNC_FOURCC_TO_INT('X','R','G','B'), NULL, 0, VA_RT_FORMAT_RGB32, 24, 0xff, 0xff00, 0xff0000, 0},
+        {KMSVNC_FOURCC_TO_INT('X','R','G','B'), NULL, 0, VA_RT_FORMAT_RGB32, 24},
-        {KMSVNC_FOURCC_TO_INT('A','R','G','B'), NULL, 1, VA_RT_FORMAT_RGB32, 32, 0xff, 0xff00, 0xff0000, 0},
+        {KMSVNC_FOURCC_TO_INT('A','R','G','B'), NULL, 1, VA_RT_FORMAT_RGB32, 32},
 
-        {KMSVNC_FOURCC_TO_INT('B','G','R','X'), NULL, 0, VA_RT_FORMAT_RGB32, 24, 0xff000000, 0xff0000, 0xff00, 0},
+        {KMSVNC_FOURCC_TO_INT('B','G','R','X'), NULL, 0, VA_RT_FORMAT_RGB32, 24},
-        {KMSVNC_FOURCC_TO_INT('B','G','R','A'), NULL, 1, VA_RT_FORMAT_RGB32, 32, 0xff000000, 0xff0000, 0xff00, 0},
+        {KMSVNC_FOURCC_TO_INT('B','G','R','A'), NULL, 1, VA_RT_FORMAT_RGB32, 32},
 
 
-        {KMSVNC_FOURCC_TO_INT('X','R','3','0'), NULL, 0, VA_RT_FORMAT_RGB32_10, 30, 0x3ff, 0xffc00, 0x3ff00000, 0},
+        {KMSVNC_FOURCC_TO_INT('X','R','3','0'), NULL, 0, VA_RT_FORMAT_RGB32_10, 30},
-        {KMSVNC_FOURCC_TO_INT('A','R','3','0'), NULL, 1, VA_RT_FORMAT_RGB32_10, 30, 0x3ff, 0xffc00, 0x3ff00000, 0},
+        {KMSVNC_FOURCC_TO_INT('A','R','3','0'), NULL, 1, VA_RT_FORMAT_RGB32_10, 30},
-        {KMSVNC_FOURCC_TO_INT('X','B','3','0'), NULL, 0, VA_RT_FORMAT_RGB32_10, 30, 0x3ff00000, 0xffc00, 0x3ff, 0},
+        {KMSVNC_FOURCC_TO_INT('X','B','3','0'), NULL, 0, VA_RT_FORMAT_RGB32_10, 30},
-        {KMSVNC_FOURCC_TO_INT('A','B','3','0'), NULL, 1, VA_RT_FORMAT_RGB32_10, 30, 0x3ff00000, 0xffc00, 0x3ff, 0},
+        {KMSVNC_FOURCC_TO_INT('A','B','3','0'), NULL, 1, VA_RT_FORMAT_RGB32_10, 30},
     };
 
     for (int i = 0; i < va->img_fmt_count; i++) {
         for (int j = 0; j < KMSVNC_ARRAY_ELEMENTS(format_to_try); j++) {
             if (va->img_fmts[i].fourcc == format_to_try[j].va_fourcc) {
-                if (
+                format_to_try[j].fmt = va->img_fmts + i;
-                    va->img_fmts[i].blue_mask == format_to_try[j].blue_mask &&
-                    va->img_fmts[i].green_mask == format_to_try[j].green_mask &&
-                    va->img_fmts[i].red_mask == format_to_try[j].red_mask
-                ) {
-                    format_to_try[j].fmt = va->img_fmts + i;
-                }
-                else if (
-                    format_to_try[j].depth != 30 &&
-                    va->img_fmts[i].blue_mask == __builtin_bswap32(format_to_try[j].blue_mask) &&
-                    va->img_fmts[i].green_mask == __builtin_bswap32(format_to_try[j].green_mask) &&
-                    va->img_fmts[i].red_mask == __builtin_bswap32(format_to_try[j].red_mask)
-                ) {
-                    // mesa quirk: mesa fourcc and pixel data is lsb_first for RGB32 formats, msb_first for RGB32_10 formats
-                    format_to_try[j].byte_order = 1u;
-                    format_to_try[j].fmt = va->img_fmts + i;
-                }
             }
         }
     }
@@ -344,7 +324,7 @@ int va_init() {
             for (int i = 0; i < KMSVNC_ARRAY_ELEMENTS(format_to_try); i++) {
                 if (format_to_try[i].fmt == NULL) continue;
                 if (va->image->format.fourcc == format_to_try[i].fmt->fourcc) {
-                    va->selected_fmt = vaImgFmt_from_vaFmtData(format_to_try + i);
+                    va->selected_fmt = vaImgFmt_apply_quirks(format_to_try + i);
                     break;
                 }
             }
@@ -389,7 +369,7 @@ int va_init() {
                 continue;
             }
             else {
-                va->selected_fmt = vaImgFmt_from_vaFmtData(format_to_try + i);
+                va->selected_fmt = vaImgFmt_apply_quirks(format_to_try + i);
                 break;
             }
         }