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#include "mupdf/fitz.h"
struct fz_id_context_s
{
int refs;
int id;
};
static void
fz_drop_id_context(fz_context *ctx)
{
if (!ctx)
return;
if (fz_drop_imp(ctx, ctx->id, &ctx->id->refs))
fz_free(ctx, ctx->id);
}
static void
fz_new_id_context(fz_context *ctx)
{
ctx->id = fz_malloc_struct(ctx, fz_id_context);
ctx->id->refs = 1;
ctx->id->id = 0;
}
static fz_id_context *
fz_keep_id_context(fz_context *ctx)
{
if (!ctx)
return NULL;
return fz_keep_imp(ctx, ctx->id, &ctx->id->refs);
}
struct fz_style_context_s
{
int refs;
char *user_css;
};
static void fz_new_style_context(fz_context *ctx)
{
if (ctx)
{
ctx->style = fz_malloc_struct(ctx, fz_style_context);
ctx->style->refs = 1;
ctx->style->user_css = NULL;
}
}
static fz_style_context *fz_keep_style_context(fz_context *ctx)
{
if (!ctx)
return NULL;
return fz_keep_imp(ctx, ctx->style, &ctx->style->refs);
}
static void fz_drop_style_context(fz_context *ctx)
{
if (!ctx)
return;
if (fz_drop_imp(ctx, ctx->style, &ctx->style->refs))
{
fz_free(ctx, ctx->style->user_css);
fz_free(ctx, ctx->style);
}
}
void fz_set_user_css(fz_context *ctx, const char *user_css)
{
fz_free(ctx, ctx->style->user_css);
ctx->style->user_css = fz_strdup(ctx, user_css);
}
const char *fz_user_css(fz_context *ctx)
{
return ctx->style->user_css;
}
static void fz_new_tuning_context(fz_context *ctx)
{
if (ctx)
{
ctx->tuning = fz_malloc_struct(ctx, fz_tuning_context);
ctx->tuning->refs = 1;
ctx->tuning->image_decode = &fz_default_image_decode;
ctx->tuning->image_scale = &fz_default_image_scale;
}
}
static fz_tuning_context *fz_keep_tuning_context(fz_context *ctx)
{
if (!ctx)
return NULL;
return fz_keep_imp(ctx, ctx->tuning, &ctx->tuning->refs);
}
static void fz_drop_tuning_context(fz_context *ctx)
{
if (!ctx)
return;
if (fz_drop_imp(ctx, ctx->tuning, &ctx->tuning->refs))
{
fz_free(ctx, ctx->tuning);
}
}
void fz_tune_image_decode(fz_context *ctx, fz_tune_image_decode_fn *image_decode, void *arg)
{
ctx->tuning->image_decode = image_decode ? image_decode : fz_default_image_decode;
ctx->tuning->image_decode_arg = arg;
}
void fz_tune_image_scale(fz_context *ctx, fz_tune_image_scale_fn *image_scale, void *arg)
{
ctx->tuning->image_scale = image_scale ? image_scale : fz_default_image_scale;
ctx->tuning->image_scale_arg = arg;
}
void
fz_drop_context(fz_context *ctx)
{
if (!ctx)
return;
/* Other finalisation calls go here (in reverse order) */
fz_drop_document_handler_context(ctx);
fz_drop_glyph_cache_context(ctx);
fz_drop_store_context(ctx);
fz_drop_aa_context(ctx);
fz_drop_style_context(ctx);
fz_drop_tuning_context(ctx);
fz_drop_colorspace_context(ctx);
fz_drop_font_context(ctx);
fz_drop_id_context(ctx);
fz_drop_output_context(ctx);
if (ctx->warn)
{
fz_flush_warnings(ctx);
fz_free(ctx, ctx->warn);
}
if (ctx->error)
{
assert(ctx->error->top == ctx->error->stack - 1);
fz_free(ctx, ctx->error);
}
/* Free the context itself */
ctx->alloc->free(ctx->alloc->user, ctx);
}
/* Allocate new context structure, and initialise allocator, and sections
* that aren't shared between contexts.
*/
static fz_context *
new_context_phase1(const fz_alloc_context *alloc, const fz_locks_context *locks)
{
fz_context *ctx;
ctx = alloc->malloc(alloc->user, sizeof(fz_context));
if (!ctx)
return NULL;
memset(ctx, 0, sizeof *ctx);
ctx->user = NULL;
ctx->alloc = alloc;
ctx->locks = locks;
ctx->glyph_cache = NULL;
ctx->error = Memento_label(fz_malloc_no_throw(ctx, sizeof(fz_error_context)), "fz_error_context");
if (!ctx->error)
goto cleanup;
ctx->error->top = ctx->error->stack - 1;
ctx->error->errcode = FZ_ERROR_NONE;
ctx->error->message[0] = 0;
ctx->warn = Memento_label(fz_malloc_no_throw(ctx, sizeof(fz_warn_context)), "fz_warn_context");
if (!ctx->warn)
goto cleanup;
ctx->warn->message[0] = 0;
ctx->warn->count = 0;
/* New initialisation calls for context entries go here */
fz_try(ctx)
{
fz_new_aa_context(ctx);
}
fz_catch(ctx)
{
goto cleanup;
}
return ctx;
cleanup:
fprintf(stderr, "cannot create context (phase 1)\n");
fz_drop_context(ctx);
return NULL;
}
fz_context *
fz_new_context_imp(const fz_alloc_context *alloc, const fz_locks_context *locks, unsigned int max_store, const char *version)
{
fz_context *ctx;
if (strcmp(version, FZ_VERSION))
{
fprintf(stderr, "cannot create context: incompatible header (%s) and library (%s) versions\n", version, FZ_VERSION);
return NULL;
}
if (!alloc)
alloc = &fz_alloc_default;
if (!locks)
locks = &fz_locks_default;
ctx = new_context_phase1(alloc, locks);
if (!ctx)
return NULL;
/* Now initialise sections that are shared */
fz_try(ctx)
{
fz_new_output_context(ctx);
fz_new_store_context(ctx, max_store);
fz_new_glyph_cache_context(ctx);
fz_new_colorspace_context(ctx);
fz_new_font_context(ctx);
fz_new_id_context(ctx);
fz_new_document_handler_context(ctx);
fz_new_style_context(ctx);
fz_new_tuning_context(ctx);
}
fz_catch(ctx)
{
fprintf(stderr, "cannot create context (phase 2)\n");
fz_drop_context(ctx);
return NULL;
}
return ctx;
}
fz_context *
fz_clone_context(fz_context *ctx)
{
/* We cannot safely clone the context without having locking/
* unlocking functions. */
if (ctx == NULL || ctx->locks == &fz_locks_default)
return NULL;
return fz_clone_context_internal(ctx);
}
fz_context *
fz_clone_context_internal(fz_context *ctx)
{
fz_context *new_ctx;
if (ctx == NULL || ctx->alloc == NULL)
return NULL;
new_ctx = new_context_phase1(ctx->alloc, ctx->locks);
if (!new_ctx)
return NULL;
/* Inherit AA defaults from old context. */
fz_copy_aa_context(new_ctx, ctx);
/* Keep thread lock checking happy by copying pointers first and locking under new context */
new_ctx->output = ctx->output;
new_ctx->output = fz_keep_output_context(new_ctx);
new_ctx->user = ctx->user;
new_ctx->store = ctx->store;
new_ctx->store = fz_keep_store_context(new_ctx);
new_ctx->glyph_cache = ctx->glyph_cache;
new_ctx->glyph_cache = fz_keep_glyph_cache(new_ctx);
new_ctx->colorspace = ctx->colorspace;
new_ctx->colorspace = fz_keep_colorspace_context(new_ctx);
new_ctx->font = ctx->font;
new_ctx->font = fz_keep_font_context(new_ctx);
new_ctx->style = ctx->style;
new_ctx->style = fz_keep_style_context(new_ctx);
new_ctx->id = ctx->id;
new_ctx->id = fz_keep_id_context(new_ctx);
new_ctx->tuning = ctx->tuning;
new_ctx->tuning = fz_keep_tuning_context(new_ctx);
new_ctx->handler = ctx->handler;
new_ctx->handler = fz_keep_document_handler_context(new_ctx);
return new_ctx;
}
int
fz_gen_id(fz_context *ctx)
{
int id;
fz_lock(ctx, FZ_LOCK_ALLOC);
/* We'll never wrap around in normal use, but if we do, then avoid 0. */
do
id = ++ctx->id->id;
while (id == 0);
fz_unlock(ctx, FZ_LOCK_ALLOC);
return id;
}
void fz_set_user_context(fz_context *ctx, void *user)
{
if (ctx != NULL)
ctx->user = user;
}
void *fz_user_context(fz_context *ctx)
{
if (ctx == NULL)
return NULL;
return ctx->user;
}
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