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Diffstat (limited to 'src/gallium/state_trackers/vega/text.c')
-rw-r--r--src/gallium/state_trackers/vega/text.c250
1 files changed, 250 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/vega/text.c b/src/gallium/state_trackers/vega/text.c
new file mode 100644
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+++ b/src/gallium/state_trackers/vega/text.c
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+/**************************************************************************
+ *
+ * Copyright 2010 LunarG, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include "util/u_memory.h"
+#include "cso_cache/cso_hash.h"
+
+#include "text.h"
+#include "image.h"
+#include "path.h"
+#include "api.h"
+
+#ifdef OPENVG_VERSION_1_1
+
+struct vg_font {
+ struct vg_object base;
+ struct cso_hash *glyphs;
+};
+
+struct vg_glyph {
+ struct vg_object *object; /* it could be NULL */
+ VGboolean is_hinted;
+ VGfloat glyph_origin[2];
+ VGfloat escapement[2];
+};
+
+static VGboolean del_glyph(struct vg_font *font,
+ VGuint glyphIndex)
+{
+ struct vg_glyph *glyph;
+
+ glyph = (struct vg_glyph *)
+ cso_hash_take(font->glyphs, (unsigned) glyphIndex);
+ if (glyph)
+ FREE(glyph);
+
+ return (glyph != NULL);
+}
+
+static void add_glyph(struct vg_font *font,
+ VGuint glyphIndex,
+ struct vg_object *obj,
+ VGboolean isHinted,
+ const VGfloat glyphOrigin[2],
+ const VGfloat escapement[2])
+{
+ struct vg_glyph *glyph;
+
+ /* remove the existing one */
+ del_glyph(font, glyphIndex);
+
+ glyph = CALLOC_STRUCT(vg_glyph);
+ glyph->object = obj;
+ glyph->is_hinted = isHinted;
+ memcpy(glyph->glyph_origin, glyphOrigin, sizeof(glyphOrigin));
+ memcpy(glyph->escapement, escapement, sizeof(escapement));
+
+ cso_hash_insert(font->glyphs, (unsigned) glyphIndex, glyph);
+}
+
+static struct vg_glyph *get_glyph(struct vg_font *font,
+ VGuint glyphIndex)
+{
+ struct cso_hash_iter iter;
+
+ iter = cso_hash_find(font->glyphs, (unsigned) glyphIndex);
+ return (struct vg_glyph *) cso_hash_iter_data(iter);
+}
+
+static void vg_render_glyph(struct vg_context *ctx,
+ struct vg_glyph *glyph,
+ VGbitfield paintModes,
+ VGboolean allowAutoHinting)
+{
+ if (glyph->object && paintModes) {
+ struct vg_state *state = &ctx->state.vg;
+ struct matrix m;
+
+ m = state->glyph_user_to_surface_matrix;
+ matrix_translate(&m,
+ state->glyph_origin[0].f - glyph->glyph_origin[0],
+ state->glyph_origin[1].f - glyph->glyph_origin[1]);
+
+ if (glyph->object->type == VG_OBJECT_PATH) {
+ path_render((struct path *) glyph->object, paintModes, &m);
+ }
+ else {
+ assert(glyph->object->type == VG_OBJECT_IMAGE);
+ image_draw((struct vg_image *) glyph->object, &m);
+ }
+ }
+}
+
+static void vg_advance_glyph(struct vg_context *ctx,
+ struct vg_glyph *glyph,
+ VGfloat adjustment_x,
+ VGfloat adjustment_y,
+ VGboolean last)
+{
+ struct vg_value *glyph_origin = ctx->state.vg.glyph_origin;
+
+ glyph_origin[0].f += glyph->escapement[0] + adjustment_x;
+ glyph_origin[1].f += glyph->escapement[1] + adjustment_y;
+
+ if (last) {
+ glyph_origin[0].i = float_to_int_floor(glyph_origin[0].f);
+ glyph_origin[1].i = float_to_int_floor(glyph_origin[1].f);
+ }
+}
+
+struct vg_font *font_create(VGint glyphCapacityHint)
+{
+ struct vg_context *ctx = vg_current_context();
+ struct vg_font *font;
+
+ font = CALLOC_STRUCT(vg_font);
+ vg_init_object(&font->base, ctx, VG_OBJECT_FONT);
+ font->glyphs = cso_hash_create();
+
+ vg_context_add_object(ctx, VG_OBJECT_FONT, font);
+
+ return font;
+}
+
+void font_destroy(struct vg_font *font)
+{
+ struct vg_context *ctx = vg_current_context();
+ struct cso_hash_iter iter;
+
+ vg_context_remove_object(ctx, VG_OBJECT_FONT, font);
+
+ iter = cso_hash_first_node(font->glyphs);
+ while (!cso_hash_iter_is_null(iter)) {
+ struct vg_glyph *glyph = (struct vg_glyph *) cso_hash_iter_data(iter);
+ FREE(glyph);
+ iter = cso_hash_iter_next(iter);
+ }
+ cso_hash_delete(font->glyphs);
+
+ FREE(font);
+}
+
+void font_set_glyph_to_path(struct vg_font *font,
+ VGuint glyphIndex,
+ struct path *path,
+ VGboolean isHinted,
+ const VGfloat glyphOrigin[2],
+ const VGfloat escapement[2])
+{
+ add_glyph(font, glyphIndex, (struct vg_object *) path,
+ isHinted, glyphOrigin, escapement);
+}
+
+void font_set_glyph_to_image(struct vg_font *font,
+ VGuint glyphIndex,
+ struct vg_image *image,
+ const VGfloat glyphOrigin[2],
+ const VGfloat escapement[2])
+{
+ add_glyph(font, glyphIndex, (struct vg_object *) image,
+ VG_TRUE, glyphOrigin, escapement);
+}
+
+void font_clear_glyph(struct vg_font *font,
+ VGuint glyphIndex)
+{
+ if (!del_glyph(font, glyphIndex)) {
+ struct vg_context *ctx = vg_current_context();
+ vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+ }
+}
+
+void font_draw_glyph(struct vg_font *font,
+ VGuint glyphIndex,
+ VGbitfield paintModes,
+ VGboolean allowAutoHinting)
+{
+ struct vg_context *ctx = vg_current_context();
+ struct vg_glyph *glyph;
+
+ glyph = get_glyph(font, glyphIndex);
+ if (!glyph) {
+ vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+ return;
+ }
+
+ vg_render_glyph(ctx, glyph, paintModes, allowAutoHinting);
+ vg_advance_glyph(ctx, glyph, 0.0f, 0.0f, VG_TRUE);
+}
+
+void font_draw_glyphs(struct vg_font *font,
+ VGint glyphCount,
+ const VGuint *glyphIndices,
+ const VGfloat *adjustments_x,
+ const VGfloat *adjustments_y,
+ VGbitfield paintModes,
+ VGboolean allowAutoHinting)
+{
+ struct vg_context *ctx = vg_current_context();
+ VGint i;
+
+ for (i = 0; i < glyphCount; ++i) {
+ if (!get_glyph(font, glyphIndices[i])) {
+ vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
+ return;
+ }
+ }
+
+ for (i = 0; i < glyphCount; ++i) {
+ struct vg_glyph *glyph;
+ VGfloat adj_x, adj_y;
+
+ glyph = get_glyph(font, glyphIndices[i]);
+
+ vg_render_glyph(ctx, glyph, paintModes, allowAutoHinting);
+
+ adj_x = (adjustments_x) ? adjustments_x[i] : 0.0f;
+ adj_y = (adjustments_y) ? adjustments_y[i] : 0.0f;
+ vg_advance_glyph(ctx, glyph, adj_x, adj_y, (i == glyphCount - 1));
+ }
+}
+
+VGint font_num_glyphs(struct vg_font *font)
+{
+ return cso_hash_size(font->glyphs);
+}
+
+#endif /* OPENVG_VERSION_1_1 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 12:10:06 +0000