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-rw-r--r--README4
-rw-r--r--common.h3
-rw-r--r--demo.c5
-rw-r--r--libskrift_create_context.c18
-rw-r--r--libskrift_draw_text.c7
5 files changed, 26 insertions, 11 deletions
diff --git a/README b/README
index f7327d9..dc282f7 100644
--- a/README
+++ b/README
@@ -36,7 +36,7 @@ Currently implemented:
sRGB gamma function.
- Affine transformations on glyphs.
+ Affine transformations on glyphs and texts.
Pending support in libschift:
@@ -55,8 +55,6 @@ Pending support in libschift:
Not implemented yet
- Affine transformations on texts.
-
Glyph caching.
Normalise text when glyphs are missing.
diff --git a/common.h b/common.h
index 5015efd..5caf373 100644
--- a/common.h
+++ b/common.h
@@ -31,6 +31,9 @@ struct libskrift_context {
char subpixel_horizontally;
char subpixel_vertically;
char subpixel_bgr;
+ double x_advancement;
+ double y_advancement;
+ double transformation[6];
size_t nfonts;
LIBSKRIFT_FONT *fonts[];
};
diff --git a/demo.c b/demo.c
index c6a27d2..0d0a866 100644
--- a/demo.c
+++ b/demo.c
@@ -17,13 +17,14 @@ main(void)
rendering.smoothing = LIBSKRIFT_SUBPIXEL;
rendering.subpixel_order = LIBSKRIFT_NONE;
- rendering.flags = LIBSKRIFT_MIRROR_CHARS;
+ rendering.flags = LIBSKRIFT_MIRROR_CHARS * 0;
if (libskrift_open_font_file(&font, DEMO_FONT)) {
perror("libskrift_open_font_file");
return -1;
}
- libskrift_add_rotation_degrees(rendering.char_transformation, 10);
+ libskrift_add_rotation_degrees(rendering.text_transformation, -10);
+ libskrift_add_shear(rendering.char_transformation, .75f, 0);
height = libskrift_points_to_pixels(72, &rendering);
if (libskrift_create_context(&ctx, &font, 1, height, &rendering, NULL)) {
perror("libskrift_create_context");
diff --git a/libskrift_create_context.c b/libskrift_create_context.c
index 1500b20..f034240 100644
--- a/libskrift_create_context.c
+++ b/libskrift_create_context.c
@@ -39,7 +39,7 @@ transformation_hook(void *hook_data, double advance, double transform[6])
double m1[6] = {1, 0, 0, 0, 1, 0}, m2[6] = {1, 0, 0, 0, 1, 0};
if (((ctx->rendering.flags / LIBSKRIFT_MIRROR_CHARS) ^ (ctx->rendering.flags / LIBSKRIFT_MIRROR_TEXT)) & 1)
multiply_matrices((double []){-1, 0, advance / schrift[0], 0, 1, 0}, m2, m1);
- multiply_matrices(ctx->rendering.char_transformation, m1, m2);
+ multiply_matrices(ctx->transformation, m1, m2);
multiply_matrices(schrift, m2, m1);
transform[0] = m1[0];
transform[2] = m1[1];
@@ -76,6 +76,8 @@ libskrift_create_context(LIBSKRIFT_CONTEXT **ctxp, LIBSKRIFT_FONT **fonts, size_
(*ctxp)->schrift_ctx.font = fonts[0]->font;
(*ctxp)->schrift_ctx.yScale = height;
+ (*ctxp)->x_advancement = 1;
+ (*ctxp)->y_advancement = 0;
(*ctxp)->nfonts = nfonts;
for (i = 0; i < nfonts; i++) {
(*ctxp)->fonts[i] = fonts[i];
@@ -90,7 +92,6 @@ 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, text_transformation);
} else {
memcpy(&(*ctxp)->rendering, &default_rendering, sizeof(default_rendering));
}
@@ -116,8 +117,19 @@ libskrift_create_context(LIBSKRIFT_CONTEXT **ctxp, LIBSKRIFT_FONT **fonts, size_
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)
+ fpclassify((*ctxp)->rendering.char_transformation[5]) != FP_ZERO ||
+ fpclassify((*ctxp)->rendering.text_transformation[0] - 1) != FP_ZERO ||
+ fpclassify((*ctxp)->rendering.text_transformation[1]) != FP_ZERO ||
+ fpclassify((*ctxp)->rendering.text_transformation[2]) != FP_ZERO ||
+ fpclassify((*ctxp)->rendering.text_transformation[3]) != FP_ZERO ||
+ fpclassify((*ctxp)->rendering.text_transformation[4] - 1) != FP_ZERO ||
+ fpclassify((*ctxp)->rendering.text_transformation[5]) != FP_ZERO) {
+ memcpy((*ctxp)->transformation, (*ctxp)->rendering.char_transformation, sizeof((*ctxp)->transformation));
+ libskrift_add_transformation((*ctxp)->transformation, (*ctxp)->rendering.text_transformation);
+ (*ctxp)->x_advancement = (*ctxp)->rendering.text_transformation[0];
+ (*ctxp)->y_advancement = (*ctxp)->rendering.text_transformation[3];
(*ctxp)->schrift_ctx.transformation_hook = transformation_hook;
+ }
if ((*ctxp)->rendering.smoothing == LIBSKRIFT_SUBPIXEL) {
if ((*ctxp)->rendering.subpixel_order == LIBSKRIFT_RGB) {
diff --git a/libskrift_draw_text.c b/libskrift_draw_text.c
index 8f46df4..95fd523 100644
--- a/libskrift_draw_text.c
+++ b/libskrift_draw_text.c
@@ -7,17 +7,18 @@ libskrift_draw_text(LIBSKRIFT_CONTEXT *ctx, const char *text, const struct libsk
{
struct libskrift_saved_grapheme saved = LIBSKRIFT_NO_SAVED_GRAPHEME;
struct libskrift_glyph *glyph;
- double xpos = 0;
+ double xpos = 0, ypos = 0;
ssize_t len;
int r;
for (; *text; text += len) {
- len = libskrift_get_cluster_glyph(ctx, text, &saved, xpos, 0, &glyph);
+ len = libskrift_get_cluster_glyph(ctx, text, &saved, xpos, ypos, &glyph);
if (len < 0)
return -1;
r = libskrift_apply_glyph(ctx, glyph, colour, x, y, image);
- xpos += glyph->advance;
+ xpos += glyph->advance * ctx->x_advancement;
+ ypos += glyph->advance * ctx->y_advancement;
free(glyph);
if (r)
return -1;
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-21 11:39:17 +0000