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| author | Mattias Andrée <maandree@kth.se> | 2020-04-28 23:55:26 +0200 |
|---|---|---|
| committer | Mattias Andrée <maandree@kth.se> | 2020-04-28 23:55:26 +0200 |
| commit | edfb8291b029193883ce7383f4dcdce24d9e7e5b (patch) | |
| tree | aa77fcff110eefec6d95f6619707f308a074233b /libskrift_create_context.c | |
| parent | Thread-safety (diff) | |
| download | libskrift-edfb8291b029193883ce7383f4dcdce24d9e7e5b.tar.gz libskrift-edfb8291b029193883ce7383f4dcdce24d9e7e5b.tar.bz2 libskrift-edfb8291b029193883ce7383f4dcdce24d9e7e5b.tar.xz | |
Add support for character transformation
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to '')
| -rw-r--r-- | libskrift_create_context.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/libskrift_create_context.c b/libskrift_create_context.c index fd8d086..cf67826 100644 --- a/libskrift_create_context.c +++ b/libskrift_create_context.c @@ -13,6 +13,26 @@ static const struct libskrift_rendering default_rendering = LIBSKRIFT_DEFAULT_RENDERING; +static int +transformation_hook(void *hook_data, double advance, double transform[6]) +{ + LIBSKRIFT_CONTEXT *ctx = hook_data; + double r1c1b = ctx->rendering.char_transformation[0], r1c1a = transform[0]; + double r1c2b = ctx->rendering.char_transformation[1], r1c2a = transform[2]; + double r1c3b = ctx->rendering.char_transformation[2], r1c3a = transform[4]; + double r2c1b = ctx->rendering.char_transformation[3], r2c1a = transform[1]; + double r2c2b = ctx->rendering.char_transformation[4], r2c2a = transform[3]; + double r2c3b = ctx->rendering.char_transformation[5], r2c3a = transform[5]; + transform[0] = r1c1a * r1c1b + r1c2a * r2c1b; + transform[2] = r1c1a * r1c2b + r1c2a * r2c2b; + transform[4] = r1c1a * r1c3b + r1c2a * r2c3b + r1c3a; + transform[1] = r2c1a * r1c1b + r2c2a * r2c1b; + transform[3] = r2c1a * r1c2b + r2c2a * r2c2b; + transform[5] = r2c1a * r1c3b + r2c2a * r2c3b + r2c3a; + (void) advance; + return 0; +} + int libskrift_create_context(LIBSKRIFT_CONTEXT **ctxp, LIBSKRIFT_FONT **fonts, size_t nfonts, double height, const struct libskrift_rendering *rendering, void *caching) @@ -53,7 +73,6 @@ libskrift_create_context(LIBSKRIFT_CONTEXT **ctxp, LIBSKRIFT_FONT **fonts, size_ COPY_ARRAY((*ctxp)->rendering, default_rendering, top_transformation); COPY_ARRAY((*ctxp)->rendering, default_rendering, bottom_transformation); COPY_ARRAY((*ctxp)->rendering, default_rendering, poststroke_transformation_rotation); - COPY_ARRAY((*ctxp)->rendering, default_rendering, char_transformation); COPY_ARRAY((*ctxp)->rendering, default_rendering, text_transformation); } else { memcpy(&(*ctxp)->rendering, &default_rendering, sizeof(default_rendering)); @@ -72,6 +91,14 @@ libskrift_create_context(LIBSKRIFT_CONTEXT **ctxp, LIBSKRIFT_FONT **fonts, size_ (*ctxp)->schrift_ctx.xScale = (*ctxp)->schrift_ctx.yScale; (*ctxp)->schrift_ctx.xScale *= (*ctxp)->rendering.horizontal_dpi / (*ctxp)->rendering.vertical_dpi; + (*ctxp)->schrift_ctx.hook_data = (*ctxp); + if (fpclassify((*ctxp)->rendering.char_transformation[0] - 1) != FP_ZERO || + fpclassify((*ctxp)->rendering.char_transformation[1]) != FP_ZERO || + fpclassify((*ctxp)->rendering.char_transformation[2]) != FP_ZERO || + fpclassify((*ctxp)->rendering.char_transformation[3]) != FP_ZERO || + fpclassify((*ctxp)->rendering.char_transformation[4] - 1) != FP_ZERO || + fpclassify((*ctxp)->rendering.char_transformation[5]) != FP_ZERO) + (*ctxp)->schrift_ctx.transformation_hook = transformation_hook; if ((*ctxp)->rendering.smoothing == LIBSKRIFT_SUBPIXEL) { if ((*ctxp)->rendering.subpixel_order == LIBSKRIFT_RGB) { |