universe@3: /*
universe@3:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
universe@3:  * Copyright 2023 Mike Becker. All rights reserved.
universe@3:  *
universe@3:  * Redistribution and use in source and binary forms, with or without
universe@3:  * modification, are permitted provided that the following conditions are met:
universe@3:  *
universe@3:  *   1. Redistributions of source code must retain the above copyright
universe@3:  *      notice, this list of conditions and the following disclaimer.
universe@3:  *
universe@3:  *   2. Redistributions in binary form must reproduce the above copyright
universe@3:  *      notice, this list of conditions and the following disclaimer in the
universe@3:  *      documentation and/or other materials provided with the distribution.
universe@3:  *
universe@3:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
universe@3:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
universe@3:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
universe@3:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
universe@3:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
universe@3:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
universe@3:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
universe@3:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
universe@3:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
universe@3:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
universe@3:  * POSSIBILITY OF SUCH DAMAGE.
universe@3:  */
universe@3: 
universe@48: #include "ascension/ui/text.h"
universe@16: #include "ascension/context.h"
universe@16: #include "ascension/error.h"
universe@16: #include "ascension/shader.h"
universe@3: 
universe@16: #include <GL/glew.h>
universe@11: 
universe@29: static void asc_text_draw(AscText const *node) {
universe@50:     if (node->color.alpha == 0 || node->hidden) {
universe@29:         return;
universe@29:     }
universe@29: 
universe@44:     // Obtain shader
universe@44:     AscShaderSprite *shader = &asc_context.active_window->glctx.shader.sprite;
universe@44: 
universe@37:     // Upload model matrix
universe@44:     glUniformMatrix4fv(shader->base.model, 1,
universe@45:                        GL_FALSE, node->base.world_transform);
universe@29: 
universe@50:     // Bind texture
universe@50:     asc_texture_bind(&node->tex, shader->tex, 0);
universe@29: 
universe@41:     // Apply depth
universe@44:     glUniform1f(shader->depth, (float)(node->base.depth));
universe@41: 
universe@29:     // Draw mesh
universe@29:     asc_primitives_draw_plane();
universe@29: }
universe@29: 
universe@32: static void asc_text_update(AscText *node) {
universe@16:     // Generate new texture, if required
universe@50:     if (asc_texture_uninitialized(&node->tex)) {
universe@50:         asc_texture_init_rectangle(&node->tex);
universe@16:     }
universe@4: 
universe@16:     // Render text onto a surface
universe@18:     SDL_Surface *surface = TTF_RenderUTF8_Blended_Wrapped(
universe@19:             asc_font_cache_validate(node->font)->ptr,
universe@23:             node->text,
universe@19:             asc_col_sdl(node->color),
universe@19:             node->max_width
universe@16:     );
universe@16:     if (surface == NULL) {
universe@16:         asc_error(SDL_GetError());
universe@16:         return;
universe@16:     }
universe@52:     asc_set_scale2d(&node->base, surface->w, surface->h);
universe@45:     asc_update_transform((AscSceneNode *) node);
universe@11: 
universe@16:     // Transfer Image Data
universe@50:     asc_texture_from_surface(&node->tex, surface);
universe@11: 
universe@16:     // Free the surface
universe@16:     SDL_FreeSurface(surface);
universe@16: }
universe@16: 
universe@36: AscSceneNode *asc_text(int x, int y, char const *text) {
universe@32:     AscText *node = calloc(1, sizeof(AscText));
universe@32: 
universe@41:     node->base.render_group = ASC_RENDER_GROUP_SPRITE_BLEND;
universe@32:     node->base.free_func = (asc_scene_free_func) asc_text_free;
universe@32:     node->base.update_func = (asc_scene_update_func) asc_text_update;
universe@32:     node->base.draw_func = (asc_scene_draw_func) asc_text_draw;
universe@32: 
universe@45:     node->base.position.x = (float) x;
universe@45:     node->base.position.y = (float) y;
universe@32:     node->font = asc_context.active_font;
universe@32:     node->color = asc_context.ink;
universe@32:     if (text != NULL) {
universe@32:         node->text = strdup(text);
universe@32:     }
universe@32: 
universe@37:     // initialize
universe@37:     asc_text_update(node);
universe@37: 
universe@36:     return &node->base;
universe@32: }
universe@32: 
universe@25: void asc_text_free(AscText *node) {
universe@50:     asc_texture_destroy(&node->tex);
universe@23:     free(node->text);
universe@19:     free(node);
universe@16: }