ascension: src/text.c@7daec2f067a9 (annotated)

src/text.c@7daec2f067a9 (annotated)

src/text.c

Wed, 10 Apr 2024 19:43:34 +0200

author: Mike Becker <universe@uap-core.de>
date: Wed, 10 Apr 2024 19:43:34 +0200
changeset 57: 7daec2f067a9
parent 54: cb94d983e3dd
child 58: 26ebb2f1e6e6
permissions: -rw-r--r--

implement centered wrapped text

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  * Copyright 2023 Mike Becker. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include "ascension/ui/text.h"
 #include "ascension/context.h"
 #include "ascension/error.h"
 #include "ascension/shader.h"
 #include <GL/glew.h>
 static void asc_text_draw(AscText const *node) {
     // Obtain shader
     AscShaderSprite *shader = &asc_context.active_window->glctx.shader.sprite;
     // Upload model matrix
     glUniformMatrix4fv(shader->base.model, 1,
                        GL_FALSE, node->base.world_transform);
     // Bind texture
     asc_texture_bind(&node->tex, shader->tex, 0);
     // Apply depth
     glUniform1f(shader->depth, (float)(node->base.depth));
     // Draw mesh
     asc_primitives_draw_plane();
 }
 static void asc_text_update(AscText *node) {
     // Generate new texture, if required
     if (asc_texture_uninitialized(&node->tex)) {
         asc_texture_init_rectangle(&node->tex);
     }
     // Render text onto a surface
     TTF_Font *font = asc_font_cache_validate(node->font)->ptr;
     TTF_SetFontWrappedAlign(
             font, node->centered ?
                   TTF_WRAPPED_ALIGN_CENTER : TTF_WRAPPED_ALIGN_LEFT
     );
     SDL_Surface *surface = TTF_RenderUTF8_Blended_Wrapped(
             font, node->text, asc_col_sdl(node->color), node->max_width
     );
     if (surface == NULL) {
         asc_error(SDL_GetError());
         return;
     }
     asc_set_scale2d(&node->base, surface->w, surface->h);
     asc_update_transform((AscSceneNode *) node);
     // Transfer Image Data
     asc_texture_from_surface(&node->tex, surface);
     // Free the surface
     SDL_FreeSurface(surface);
 }
 AscSceneNode *asc_text(int x, int y, char const *text) {
     AscText *node = calloc(1, sizeof(AscText));
     node->base.render_group = ASC_RENDER_GROUP_SPRITE_BLEND;
     node->base.free_func = (asc_scene_free_func) asc_text_free;
     node->base.update_func = (asc_scene_update_func) asc_text_update;
     node->base.draw_func = (asc_scene_draw_func) asc_text_draw;
     node->base.position.x = (float) x;
     node->base.position.y = (float) y;
     node->font = asc_context.active_font;
     node->color = asc_context.ink;
     if (text != NULL) {
         node->text = strdup(text);
     }
     // initialize
     asc_text_update(node);
     return &node->base;
 }
 void asc_text_free(AscText *node) {
     asc_texture_destroy(&node->tex);
     free(node->text);
     free(node);
 }

Mercurial > hg > ascension / annotate

src/text.c@7daec2f067a9 (annotated)

src/text.c