diff options
Diffstat (limited to 'third_party/jpeg-xl/plugins/gdk-pixbuf/pixbufloader-jxl.c')
| -rw-r--r-- | third_party/jpeg-xl/plugins/gdk-pixbuf/pixbufloader-jxl.c | 816 |
1 files changed, 816 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/plugins/gdk-pixbuf/pixbufloader-jxl.c b/third_party/jpeg-xl/plugins/gdk-pixbuf/pixbufloader-jxl.c new file mode 100644 index 0000000000..9df9611b39 --- /dev/null +++ b/third_party/jpeg-xl/plugins/gdk-pixbuf/pixbufloader-jxl.c @@ -0,0 +1,816 @@ +// Copyright (c) the JPEG XL Project Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#include <jxl/codestream_header.h> +#include <jxl/decode.h> +#include <jxl/encode.h> +#include <jxl/resizable_parallel_runner.h> +#include <jxl/types.h> + +#include "lcms2.h" + +#define GDK_PIXBUF_ENABLE_BACKEND +#include <gdk-pixbuf/gdk-pixbuf.h> +#undef GDK_PIXBUF_ENABLE_BACKEND + +G_BEGIN_DECLS + +// Information about a single frame. +typedef struct { + uint64_t duration_ms; + GdkPixbuf *data; + gboolean decoded; +} GdkPixbufJxlAnimationFrame; + +// Represent a whole JPEG XL animation; all its fields are owned; as a GObject, +// the Animation struct itself is reference counted (as are the GdkPixbufs for +// individual frames). +struct _GdkPixbufJxlAnimation { + GdkPixbufAnimation parent_instance; + + // GDK interface implementation callbacks. + GdkPixbufModuleSizeFunc image_size_callback; + GdkPixbufModulePreparedFunc pixbuf_prepared_callback; + GdkPixbufModuleUpdatedFunc area_updated_callback; + gpointer user_data; + + // All frames known so far; a frame is added when the JXL_DEC_FRAME event is + // received from the decoder; initially frame.decoded is FALSE, until + // the JXL_DEC_IMAGE event is received. + GArray *frames; + + // JPEG XL decoder and related structures. + JxlParallelRunner *parallel_runner; + JxlDecoder *decoder; + JxlPixelFormat pixel_format; + + // Decoding is `done` when JXL_DEC_SUCCESS is received; calling + // load_increment afterwards gives an error. + gboolean done; + + // Image information. + size_t xsize; + size_t ysize; + gboolean alpha_premultiplied; + gboolean has_animation; + gboolean has_alpha; + uint64_t total_duration_ms; + uint64_t tick_duration_us; + uint64_t repetition_count; // 0 = loop forever + + gpointer icc_buff; + cmsContext context; + cmsHPROFILE profile, srgb; + cmsHTRANSFORM transform; +}; + +#define GDK_TYPE_PIXBUF_JXL_ANIMATION (gdk_pixbuf_jxl_animation_get_type()) +G_DECLARE_FINAL_TYPE(GdkPixbufJxlAnimation, gdk_pixbuf_jxl_animation, GDK, + JXL_ANIMATION, GdkPixbufAnimation); + +G_DEFINE_TYPE(GdkPixbufJxlAnimation, gdk_pixbuf_jxl_animation, + GDK_TYPE_PIXBUF_ANIMATION); + +// Iterator to a given point in time in the animation; contains a pointer to the +// full animation. +struct _GdkPixbufJxlAnimationIter { + GdkPixbufAnimationIter parent_instance; + GdkPixbufJxlAnimation *animation; + size_t current_frame; + uint64_t time_offset; +}; + +#define GDK_TYPE_PIXBUF_JXL_ANIMATION_ITER \ + (gdk_pixbuf_jxl_animation_iter_get_type()) +G_DECLARE_FINAL_TYPE(GdkPixbufJxlAnimationIter, gdk_pixbuf_jxl_animation_iter, + GDK, JXL_ANIMATION_ITER, GdkPixbufAnimationIter); +G_DEFINE_TYPE(GdkPixbufJxlAnimationIter, gdk_pixbuf_jxl_animation_iter, + GDK_TYPE_PIXBUF_ANIMATION_ITER); + +static void gdk_pixbuf_jxl_animation_init(GdkPixbufJxlAnimation *obj) { + // Suppress "unused function" warnings. + (void)glib_autoptr_cleanup_GdkPixbufJxlAnimation; + (void)GDK_JXL_ANIMATION; + (void)GDK_IS_JXL_ANIMATION; +} + +static gboolean gdk_pixbuf_jxl_animation_is_static_image( + GdkPixbufAnimation *anim) { + GdkPixbufJxlAnimation *jxl_anim = (GdkPixbufJxlAnimation *)anim; + return !jxl_anim->has_animation; +} + +static GdkPixbuf *gdk_pixbuf_jxl_animation_get_static_image( + GdkPixbufAnimation *anim) { + GdkPixbufJxlAnimation *jxl_anim = (GdkPixbufJxlAnimation *)anim; + if (jxl_anim->frames == NULL || jxl_anim->frames->len == 0) return NULL; + GdkPixbufJxlAnimationFrame *frame = + &g_array_index(jxl_anim->frames, GdkPixbufJxlAnimationFrame, 0); + return frame->decoded ? frame->data : NULL; +} + +static void gdk_pixbuf_jxl_animation_get_size(GdkPixbufAnimation *anim, + int *width, int *height) { + GdkPixbufJxlAnimation *jxl_anim = (GdkPixbufJxlAnimation *)anim; + if (width) *width = jxl_anim->xsize; + if (height) *height = jxl_anim->ysize; +} + +G_GNUC_BEGIN_IGNORE_DEPRECATIONS +static gboolean gdk_pixbuf_jxl_animation_iter_advance( + GdkPixbufAnimationIter *iter, const GTimeVal *current_time); + +static GdkPixbufAnimationIter *gdk_pixbuf_jxl_animation_get_iter( + GdkPixbufAnimation *anim, const GTimeVal *start_time) { + GdkPixbufJxlAnimationIter *iter = + g_object_new(GDK_TYPE_PIXBUF_JXL_ANIMATION_ITER, NULL); + iter->animation = (GdkPixbufJxlAnimation *)anim; + iter->time_offset = start_time->tv_sec * 1000ULL + start_time->tv_usec / 1000; + g_object_ref(iter->animation); + gdk_pixbuf_jxl_animation_iter_advance((GdkPixbufAnimationIter *)iter, + start_time); + return (GdkPixbufAnimationIter *)iter; +} +G_GNUC_END_IGNORE_DEPRECATIONS + +static void gdk_pixbuf_jxl_animation_finalize(GObject *obj) { + GdkPixbufJxlAnimation *decoder_state = (GdkPixbufJxlAnimation *)obj; + if (decoder_state->frames != NULL) { + for (size_t i = 0; i < decoder_state->frames->len; i++) { + g_object_unref( + g_array_index(decoder_state->frames, GdkPixbufJxlAnimationFrame, i) + .data); + } + g_array_free(decoder_state->frames, /*free_segment=*/TRUE); + } + JxlResizableParallelRunnerDestroy(decoder_state->parallel_runner); + JxlDecoderDestroy(decoder_state->decoder); + cmsDeleteTransform(decoder_state->transform); + cmsCloseProfile(decoder_state->srgb); + cmsCloseProfile(decoder_state->profile); + cmsDeleteContext(decoder_state->context); + g_free(decoder_state->icc_buff); +} + +static void gdk_pixbuf_jxl_animation_class_init( + GdkPixbufJxlAnimationClass *klass) { + G_OBJECT_CLASS(klass)->finalize = gdk_pixbuf_jxl_animation_finalize; + klass->parent_class.is_static_image = + gdk_pixbuf_jxl_animation_is_static_image; + klass->parent_class.get_static_image = + gdk_pixbuf_jxl_animation_get_static_image; + klass->parent_class.get_size = gdk_pixbuf_jxl_animation_get_size; + klass->parent_class.get_iter = gdk_pixbuf_jxl_animation_get_iter; +} + +static void gdk_pixbuf_jxl_animation_iter_init(GdkPixbufJxlAnimationIter *obj) { + (void)glib_autoptr_cleanup_GdkPixbufJxlAnimationIter; + (void)GDK_JXL_ANIMATION_ITER; + (void)GDK_IS_JXL_ANIMATION_ITER; +} + +static int gdk_pixbuf_jxl_animation_iter_get_delay_time( + GdkPixbufAnimationIter *iter) { + GdkPixbufJxlAnimationIter *jxl_iter = (GdkPixbufJxlAnimationIter *)iter; + if (jxl_iter->animation->frames->len <= jxl_iter->current_frame) { + return 0; + } + return g_array_index(jxl_iter->animation->frames, GdkPixbufJxlAnimationFrame, + jxl_iter->current_frame) + .duration_ms; +} + +static GdkPixbuf *gdk_pixbuf_jxl_animation_iter_get_pixbuf( + GdkPixbufAnimationIter *iter) { + GdkPixbufJxlAnimationIter *jxl_iter = (GdkPixbufJxlAnimationIter *)iter; + if (jxl_iter->animation->frames->len <= jxl_iter->current_frame) { + return NULL; + } + return g_array_index(jxl_iter->animation->frames, GdkPixbufJxlAnimationFrame, + jxl_iter->current_frame) + .data; +} + +static gboolean gdk_pixbuf_jxl_animation_iter_on_currently_loading_frame( + GdkPixbufAnimationIter *iter) { + GdkPixbufJxlAnimationIter *jxl_iter = (GdkPixbufJxlAnimationIter *)iter; + if (jxl_iter->animation->frames->len <= jxl_iter->current_frame) { + return TRUE; + } + return !g_array_index(jxl_iter->animation->frames, GdkPixbufJxlAnimationFrame, + jxl_iter->current_frame) + .decoded; +} + +G_GNUC_BEGIN_IGNORE_DEPRECATIONS +static gboolean gdk_pixbuf_jxl_animation_iter_advance( + GdkPixbufAnimationIter *iter, const GTimeVal *current_time) { + GdkPixbufJxlAnimationIter *jxl_iter = (GdkPixbufJxlAnimationIter *)iter; + size_t old_frame = jxl_iter->current_frame; + + uint64_t current_time_ms = current_time->tv_sec * 1000ULL + + current_time->tv_usec / 1000 - + jxl_iter->time_offset; + + if (jxl_iter->animation->frames->len == 0) { + jxl_iter->current_frame = 0; + } else if (!jxl_iter->animation->done && + current_time_ms >= jxl_iter->animation->total_duration_ms) { + jxl_iter->current_frame = jxl_iter->animation->frames->len - 1; + } else if (jxl_iter->animation->repetition_count != 0 && + current_time_ms > jxl_iter->animation->repetition_count * + jxl_iter->animation->total_duration_ms) { + jxl_iter->current_frame = jxl_iter->animation->frames->len - 1; + } else { + uint64_t total_duration_ms = jxl_iter->animation->total_duration_ms; + // Guard against divide-by-0 in malicious files. + if (total_duration_ms == 0) total_duration_ms = 1; + uint64_t loop_offset = current_time_ms % total_duration_ms; + jxl_iter->current_frame = 0; + while (TRUE) { + uint64_t duration = + g_array_index(jxl_iter->animation->frames, GdkPixbufJxlAnimationFrame, + jxl_iter->current_frame) + .duration_ms; + if (duration >= loop_offset) { + break; + } + loop_offset -= duration; + jxl_iter->current_frame++; + } + } + + return old_frame != jxl_iter->current_frame; +} +G_GNUC_END_IGNORE_DEPRECATIONS + +static void gdk_pixbuf_jxl_animation_iter_finalize(GObject *obj) { + GdkPixbufJxlAnimationIter *iter = (GdkPixbufJxlAnimationIter *)obj; + g_object_unref(iter->animation); +} + +static void gdk_pixbuf_jxl_animation_iter_class_init( + GdkPixbufJxlAnimationIterClass *klass) { + G_OBJECT_CLASS(klass)->finalize = gdk_pixbuf_jxl_animation_iter_finalize; + klass->parent_class.get_delay_time = + gdk_pixbuf_jxl_animation_iter_get_delay_time; + klass->parent_class.get_pixbuf = gdk_pixbuf_jxl_animation_iter_get_pixbuf; + klass->parent_class.on_currently_loading_frame = + gdk_pixbuf_jxl_animation_iter_on_currently_loading_frame; + klass->parent_class.advance = gdk_pixbuf_jxl_animation_iter_advance; +} + +G_END_DECLS + +static gpointer begin_load(GdkPixbufModuleSizeFunc size_func, + GdkPixbufModulePreparedFunc prepare_func, + GdkPixbufModuleUpdatedFunc update_func, + gpointer user_data, GError **error) { + GdkPixbufJxlAnimation *decoder_state = + g_object_new(GDK_TYPE_PIXBUF_JXL_ANIMATION, NULL); + if (decoder_state == NULL) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Creation of the animation state failed"); + return NULL; + } + decoder_state->image_size_callback = size_func; + decoder_state->pixbuf_prepared_callback = prepare_func; + decoder_state->area_updated_callback = update_func; + decoder_state->user_data = user_data; + decoder_state->frames = + g_array_new(/*zero_terminated=*/FALSE, /*clear_=*/TRUE, + sizeof(GdkPixbufJxlAnimationFrame)); + + if (decoder_state->frames == NULL) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Creation of the frame array failed"); + goto cleanup; + } + + if (!(decoder_state->parallel_runner = + JxlResizableParallelRunnerCreate(NULL))) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Creation of the JXL parallel runner failed"); + goto cleanup; + } + + if (!(decoder_state->decoder = JxlDecoderCreate(NULL))) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Creation of the JXL decoder failed"); + goto cleanup; + } + + JxlDecoderStatus status; + + if ((status = JxlDecoderSetParallelRunner( + decoder_state->decoder, JxlResizableParallelRunner, + decoder_state->parallel_runner)) != JXL_DEC_SUCCESS) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JxlDecoderSetParallelRunner failed: %x", status); + goto cleanup; + } + if ((status = JxlDecoderSubscribeEvents( + decoder_state->decoder, JXL_DEC_BASIC_INFO | JXL_DEC_COLOR_ENCODING | + JXL_DEC_FULL_IMAGE | JXL_DEC_FRAME)) != + JXL_DEC_SUCCESS) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JxlDecoderSubscribeEvents failed: %x", status); + goto cleanup; + } + + decoder_state->pixel_format.data_type = JXL_TYPE_FLOAT; + decoder_state->pixel_format.endianness = JXL_NATIVE_ENDIAN; + + return decoder_state; +cleanup: + JxlResizableParallelRunnerDestroy(decoder_state->parallel_runner); + JxlDecoderDestroy(decoder_state->decoder); + g_object_unref(decoder_state); + return NULL; +} + +static gboolean stop_load(gpointer context, GError **error) { + g_object_unref(context); + return TRUE; +} + +static void draw_pixels(void *context, size_t x, size_t y, size_t num_pixels, + const void *pixels) { + GdkPixbufJxlAnimation *decoder_state = context; + + GdkPixbuf *output = + g_array_index(decoder_state->frames, GdkPixbufJxlAnimationFrame, + decoder_state->frames->len - 1) + .data; + + guchar *dst = gdk_pixbuf_get_pixels(output) + + decoder_state->pixel_format.num_channels * x + + gdk_pixbuf_get_rowstride(output) * y; + + cmsDoTransform(decoder_state->transform, pixels, dst, num_pixels); +} + +static gboolean load_increment(gpointer context, const guchar *buf, guint size, + GError **error) { + GdkPixbufJxlAnimation *decoder_state = context; + if (decoder_state->done == TRUE) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JXL decoder load_increment called after end of file"); + return FALSE; + } + + JxlDecoderStatus status; + + if ((status = JxlDecoderSetInput(decoder_state->decoder, buf, size)) != + JXL_DEC_SUCCESS) { + // Should never happen if things are done properly. + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JXL decoder logic error: %x", status); + return FALSE; + } + + for (;;) { + status = JxlDecoderProcessInput(decoder_state->decoder); + switch (status) { + case JXL_DEC_NEED_MORE_INPUT: { + JxlDecoderReleaseInput(decoder_state->decoder); + return TRUE; + } + + case JXL_DEC_BASIC_INFO: { + JxlBasicInfo info; + if (JxlDecoderGetBasicInfo(decoder_state->decoder, &info) != + JXL_DEC_SUCCESS) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JXLDecoderGetBasicInfo failed"); + return FALSE; + } + decoder_state->pixel_format.num_channels = info.alpha_bits > 0 ? 4 : 3; + decoder_state->alpha_premultiplied = info.alpha_premultiplied; + decoder_state->xsize = info.xsize; + decoder_state->ysize = info.ysize; + decoder_state->has_animation = info.have_animation; + decoder_state->has_alpha = info.alpha_bits > 0; + if (info.have_animation) { + decoder_state->repetition_count = info.animation.num_loops; + decoder_state->tick_duration_us = 1000000ULL * + info.animation.tps_denominator / + info.animation.tps_numerator; + } + gint width = info.xsize; + gint height = info.ysize; + if (decoder_state->image_size_callback) { + decoder_state->image_size_callback(&width, &height, + decoder_state->user_data); + } + + // GDK convention for signaling being interested only in the basic info. + if (width == 0 || height == 0) { + decoder_state->done = TRUE; + return TRUE; + } + + // Set an appropriate number of threads for the image size. + JxlResizableParallelRunnerSetThreads( + decoder_state->parallel_runner, + JxlResizableParallelRunnerSuggestThreads(info.xsize, info.ysize)); + break; + } + + case JXL_DEC_COLOR_ENCODING: { + // Get the ICC color profile of the pixel data + size_t icc_size; + if (JXL_DEC_SUCCESS != JxlDecoderGetICCProfileSize( + decoder_state->decoder, + &decoder_state->pixel_format, + JXL_COLOR_PROFILE_TARGET_DATA, &icc_size)) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JxlDecoderGetICCProfileSize failed"); + return FALSE; + } + if (!(decoder_state->icc_buff = g_malloc(icc_size))) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Allocating ICC profile failed"); + return FALSE; + } + if (JXL_DEC_SUCCESS != + JxlDecoderGetColorAsICCProfile(decoder_state->decoder, + &decoder_state->pixel_format, + JXL_COLOR_PROFILE_TARGET_DATA, + decoder_state->icc_buff, icc_size)) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JxlDecoderGetColorAsICCProfile failed"); + return FALSE; + } + decoder_state->context = cmsCreateContext(NULL, NULL); + if (!decoder_state->context) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Failed to create LCMS2 context"); + return FALSE; + } + decoder_state->profile = cmsOpenProfileFromMemTHR( + decoder_state->context, decoder_state->icc_buff, icc_size); + if (!decoder_state->profile) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Invalid ICC profile from JXL image decoder"); + return FALSE; + } + decoder_state->srgb = cmsCreate_sRGBProfileTHR(decoder_state->context); + if (!decoder_state->srgb) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Failed to create sRGB profile"); + return FALSE; + } + decoder_state->transform = cmsCreateTransformTHR( + decoder_state->context, decoder_state->profile, + decoder_state->has_alpha ? TYPE_RGBA_FLT : TYPE_RGB_FLT, + decoder_state->srgb, + decoder_state->has_alpha ? TYPE_RGBA_8 : TYPE_RGB_8, + INTENT_RELATIVE_COLORIMETRIC, cmsFLAGS_COPY_ALPHA); + if (!decoder_state->transform) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Failed to create LCMS2 color transform"); + return FALSE; + } + + break; + } + + case JXL_DEC_FRAME: { + // TODO(veluca): support rescaling. + JxlFrameHeader frame_header; + if (JxlDecoderGetFrameHeader(decoder_state->decoder, &frame_header) != + JXL_DEC_SUCCESS) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Failed to retrieve frame info"); + return FALSE; + } + + { + GdkPixbufJxlAnimationFrame frame; + frame.decoded = FALSE; + frame.duration_ms = + frame_header.duration * decoder_state->tick_duration_us / 1000; + decoder_state->total_duration_ms += frame.duration_ms; + frame.data = + gdk_pixbuf_new(GDK_COLORSPACE_RGB, decoder_state->has_alpha, + /*bits_per_sample=*/8, decoder_state->xsize, + decoder_state->ysize); + if (frame.data == NULL) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Failed to allocate output pixel buffer"); + return FALSE; + } + decoder_state->pixel_format.align = + gdk_pixbuf_get_rowstride(frame.data); + g_array_append_val(decoder_state->frames, frame); + } + if (decoder_state->pixbuf_prepared_callback && + decoder_state->frames->len == 1) { + decoder_state->pixbuf_prepared_callback( + g_array_index(decoder_state->frames, GdkPixbufJxlAnimationFrame, + 0) + .data, + decoder_state->has_animation ? (GdkPixbufAnimation *)decoder_state + : NULL, + decoder_state->user_data); + } + break; + } + + case JXL_DEC_NEED_IMAGE_OUT_BUFFER: { + if (JXL_DEC_SUCCESS != + JxlDecoderSetImageOutCallback(decoder_state->decoder, + &decoder_state->pixel_format, + draw_pixels, decoder_state)) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JxlDecoderSetImageOutCallback failed"); + return FALSE; + } + break; + } + + case JXL_DEC_FULL_IMAGE: { + // TODO(veluca): consider doing partial updates. + if (decoder_state->area_updated_callback) { + GdkPixbuf *output = g_array_index(decoder_state->frames, + GdkPixbufJxlAnimationFrame, 0) + .data; + decoder_state->area_updated_callback( + output, 0, 0, gdk_pixbuf_get_width(output), + gdk_pixbuf_get_height(output), decoder_state->user_data); + } + g_array_index(decoder_state->frames, GdkPixbufJxlAnimationFrame, + decoder_state->frames->len - 1) + .decoded = TRUE; + break; + } + + case JXL_DEC_SUCCESS: { + decoder_state->done = TRUE; + return TRUE; + } + + default: { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Unexpected JxlDecoderProcessInput return code: %x", + status); + return FALSE; + } + } + } + return TRUE; +} + +static gboolean jxl_is_save_option_supported(const gchar *option_key) { + if (g_strcmp0(option_key, "quality") == 0) { + return TRUE; + } + + return FALSE; +} + +static gboolean jxl_image_saver(FILE *f, GdkPixbuf *pixbuf, gchar **keys, + gchar **values, GError **error) { + long quality = 90; /* default; must be between 0 and 100 */ + double distance; + gboolean save_alpha; + JxlEncoder *encoder; + void *parallel_runner; + JxlEncoderFrameSettings *frame_settings; + JxlBasicInfo output_info; + JxlPixelFormat pixel_format; + JxlColorEncoding color_profile; + JxlEncoderStatus status; + + GByteArray *compressed; + size_t offset = 0; + uint8_t *next_out; + size_t avail_out; + + if (f == NULL || pixbuf == NULL) { + return FALSE; + } + + if (keys && *keys) { + gchar **kiter = keys; + gchar **viter = values; + + while (*kiter) { + if (strcmp(*kiter, "quality") == 0) { + char *endptr = NULL; + quality = strtol(*viter, &endptr, 10); + + if (endptr == *viter) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_BAD_OPTION, + "JXL quality must be a value between 0 and 100; value " + "\"%s\" could not be parsed.", + *viter); + + return FALSE; + } + + if (quality < 0 || quality > 100) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_BAD_OPTION, + "JXL quality must be a value between 0 and 100; value " + "\"%ld\" is not allowed.", + quality); + + return FALSE; + } + } else { + g_warning("Unrecognized parameter (%s) passed to JXL saver.", *kiter); + } + + ++kiter; + ++viter; + } + } + + if (gdk_pixbuf_get_bits_per_sample(pixbuf) != 8) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_UNKNOWN_TYPE, + "Sorry, only 8bit images are supported by this JXL saver"); + return FALSE; + } + + JxlEncoderInitBasicInfo(&output_info); + output_info.have_container = JXL_FALSE; + output_info.xsize = gdk_pixbuf_get_width(pixbuf); + output_info.ysize = gdk_pixbuf_get_height(pixbuf); + output_info.bits_per_sample = 8; + output_info.orientation = JXL_ORIENT_IDENTITY; + output_info.num_color_channels = 3; + + if (output_info.xsize == 0 || output_info.ysize == 0) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_CORRUPT_IMAGE, + "Empty image, nothing to save"); + return FALSE; + } + + save_alpha = gdk_pixbuf_get_has_alpha(pixbuf); + + pixel_format.data_type = JXL_TYPE_UINT8; + pixel_format.endianness = JXL_NATIVE_ENDIAN; + pixel_format.align = gdk_pixbuf_get_rowstride(pixbuf); + + if (save_alpha) { + if (gdk_pixbuf_get_n_channels(pixbuf) != 4) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_UNKNOWN_TYPE, + "Unsupported number of channels"); + return FALSE; + } + + output_info.num_extra_channels = 1; + output_info.alpha_bits = 8; + pixel_format.num_channels = 4; + } else { + if (gdk_pixbuf_get_n_channels(pixbuf) != 3) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_UNKNOWN_TYPE, + "Unsupported number of channels"); + return FALSE; + } + + output_info.num_extra_channels = 0; + output_info.alpha_bits = 0; + pixel_format.num_channels = 3; + } + + encoder = JxlEncoderCreate(NULL); + if (!encoder) { + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Creation of the JXL encoder failed"); + return FALSE; + } + + parallel_runner = JxlResizableParallelRunnerCreate(NULL); + if (!parallel_runner) { + JxlEncoderDestroy(encoder); + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "Creation of the JXL decoder failed"); + return FALSE; + } + + JxlResizableParallelRunnerSetThreads( + parallel_runner, JxlResizableParallelRunnerSuggestThreads( + output_info.xsize, output_info.ysize)); + + status = JxlEncoderSetParallelRunner(encoder, JxlResizableParallelRunner, + parallel_runner); + if (status != JXL_ENC_SUCCESS) { + JxlResizableParallelRunnerDestroy(parallel_runner); + JxlEncoderDestroy(encoder); + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JxlDecoderSetParallelRunner failed: %x", status); + return FALSE; + } + + if (quality > 99) { + output_info.uses_original_profile = JXL_TRUE; + distance = 0; + } else { + output_info.uses_original_profile = JXL_FALSE; + if (quality >= 30) { + distance = 0.1 + (100 - quality) * 0.09; + } else { + distance = + 53.0 / 3000.0 * quality * quality - 23.0 / 20.0 * quality + 25.0; + } + } + + status = JxlEncoderSetBasicInfo(encoder, &output_info); + if (status != JXL_ENC_SUCCESS) { + JxlResizableParallelRunnerDestroy(parallel_runner); + JxlEncoderDestroy(encoder); + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JxlEncoderSetBasicInfo failed: %x", status); + return FALSE; + } + + JxlColorEncodingSetToSRGB(&color_profile, JXL_FALSE); + status = JxlEncoderSetColorEncoding(encoder, &color_profile); + if (status != JXL_ENC_SUCCESS) { + JxlResizableParallelRunnerDestroy(parallel_runner); + JxlEncoderDestroy(encoder); + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JxlEncoderSetColorEncoding failed: %x", status); + return FALSE; + } + + frame_settings = JxlEncoderFrameSettingsCreate(encoder, NULL); + JxlEncoderSetFrameDistance(frame_settings, distance); + JxlEncoderSetFrameLossless(frame_settings, output_info.uses_original_profile); + + status = JxlEncoderAddImageFrame(frame_settings, &pixel_format, + gdk_pixbuf_read_pixels(pixbuf), + gdk_pixbuf_get_byte_length(pixbuf)); + if (status != JXL_ENC_SUCCESS) { + JxlResizableParallelRunnerDestroy(parallel_runner); + JxlEncoderDestroy(encoder); + g_set_error(error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_FAILED, + "JxlEncoderAddImageFrame failed: %x", status); + return FALSE; + } + + JxlEncoderCloseInput(encoder); + + compressed = g_byte_array_sized_new(4096); + g_byte_array_set_size(compressed, 4096); + do { + next_out = compressed->data + offset; + avail_out = compressed->len - offset; + status = JxlEncoderProcessOutput(encoder, &next_out, &avail_out); + + if (status == JXL_ENC_NEED_MORE_OUTPUT) { + offset = next_out - compressed->data; + g_byte_array_set_size(compressed, compressed->len * 2); + } else if (status == JXL_ENC_ERROR) { + JxlResizableParallelRunnerDestroy(parallel_runner); + JxlEncoderDestroy(encoder); + g_set_error(error, G_FILE_ERROR, 0, "JxlEncoderProcessOutput failed: %x", + status); + return FALSE; + } + } while (status != JXL_ENC_SUCCESS); + + JxlResizableParallelRunnerDestroy(parallel_runner); + JxlEncoderDestroy(encoder); + + g_byte_array_set_size(compressed, next_out - compressed->data); + if (compressed->len > 0) { + fwrite(compressed->data, 1, compressed->len, f); + g_byte_array_free(compressed, TRUE); + return TRUE; + } + + return FALSE; +} + +void fill_vtable(GdkPixbufModule *module) { + module->begin_load = begin_load; + module->stop_load = stop_load; + module->load_increment = load_increment; + module->is_save_option_supported = jxl_is_save_option_supported; + module->save = jxl_image_saver; +} + +void fill_info(GdkPixbufFormat *info) { + static GdkPixbufModulePattern signature[] = { + {"\xFF\x0A", " ", 100}, + {"...\x0CJXL \x0D\x0A\x87\x0A", "zzz ", 100}, + {NULL, NULL, 0}, + }; + + static gchar *mime_types[] = {"image/jxl", NULL}; + + static gchar *extensions[] = {"jxl", NULL}; + + info->name = "jxl"; + info->signature = signature; + info->description = "JPEG XL image"; + info->mime_types = mime_types; + info->extensions = extensions; + info->flags = GDK_PIXBUF_FORMAT_WRITABLE | GDK_PIXBUF_FORMAT_THREADSAFE; + info->license = "BSD-3"; +} |