Subversion Repositories Kolibri OS

/**************************************************************************

 *

 * 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"

#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);

   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(glyph->glyph_origin));

   memcpy(glyph->escapement, escapement, sizeof(glyph->glyph_origin));

   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, &font->base);

   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, &font->base);

   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);

   vg_free_object(&font->base);

   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 */