/* wld: renderer.c
 *
 * Copyright (c) 2013, 2014 Michael Forney
 *
 * 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, sublicense, 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 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 NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS 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 "wld/wld-private.h"

void default_fill_region(struct wld_renderer *renderer, uint32_t color,
                         pixman_region32_t *region) {
  pixman_box32_t *box;
  int num_boxes;

  box = pixman_region32_rectangles(region, &num_boxes);

  while (num_boxes--) {
    renderer->impl->fill_rectangle(renderer, color, box->x1, box->y1,
                                   box->x2 - box->x1, box->y2 - box->y1);
    ++box;
  }
}

void default_copy_region(struct wld_renderer *renderer, struct buffer *buffer,
                         int32_t dst_x, int32_t dst_y,
                         pixman_region32_t *region) {
  pixman_box32_t *box;
  int num_boxes;

  box = pixman_region32_rectangles(region, &num_boxes);

  while (num_boxes--) {
    renderer->impl->copy_rectangle(renderer, buffer, dst_x + box->x1,
                                   dst_y + box->y1, box->x1, box->y1,
                                   box->x2 - box->x1, box->y2 - box->y1);
    ++box;
  }
}

void renderer_initialize(struct wld_renderer *renderer,
                         const struct wld_renderer_impl *impl) {
  *((const struct wld_renderer_impl **)&renderer->impl) = impl;
  renderer->target = NULL;
}

EXPORT
void wld_destroy_renderer(struct wld_renderer *renderer) {
  renderer->impl->destroy(renderer);
}

EXPORT
uint32_t wld_capabilities(struct wld_renderer *renderer,
                          struct wld_buffer *buffer) {
  return renderer->impl->capabilities(renderer, (struct buffer *)buffer);
}

EXPORT
bool wld_set_target_buffer(struct wld_renderer *renderer,
                           struct wld_buffer *buffer) {
  if (!renderer->impl->set_target(renderer, (struct buffer *)buffer))
    return false;

  renderer->target = buffer;

  return true;
}

EXPORT
bool wld_set_target_surface(struct wld_renderer *renderer,
                            struct wld_surface *surface) {
  struct buffer *back_buffer;

  if (!(back_buffer = surface->impl->back(surface)))
    return false;

  return renderer->impl->set_target(renderer, back_buffer);
}

EXPORT
void wld_fill_rectangle(struct wld_renderer *renderer, uint32_t color,
                        int32_t x, int32_t y, uint32_t width, uint32_t height) {
  renderer->impl->fill_rectangle(renderer, color, x, y, width, height);
}

EXPORT
void wld_fill_region(struct wld_renderer *renderer, uint32_t color,
                     pixman_region32_t *region) {
  renderer->impl->fill_region(renderer, color, region);
}

EXPORT
void wld_copy_rectangle(struct wld_renderer *renderer,
                        struct wld_buffer *buffer, int32_t dst_x, int32_t dst_y,
                        int32_t src_x, int32_t src_y, uint32_t width,
                        uint32_t height) {
  renderer->impl->copy_rectangle(renderer, (struct buffer *)buffer, dst_x,
                                 dst_y, src_x, src_y, width, height);
}

EXPORT
void wld_copy_region(struct wld_renderer *renderer, struct wld_buffer *buffer,
                     int32_t dst_x, int32_t dst_y, pixman_region32_t *region) {
  renderer->impl->copy_region(renderer, (struct buffer *)buffer, dst_x, dst_y,
                              region);
}

EXPORT
void wld_draw_text(struct wld_renderer *renderer, struct wld_font *font_base,
                   uint32_t color, int32_t x, int32_t y, const char *text,
                   uint32_t length, struct wld_extents *extents) {
  struct font *font = (void *)font_base;

  renderer->impl->draw_text(renderer, font, color, x, y, text, length, extents);
}

EXPORT
void wld_flush(struct wld_renderer *renderer) {
  renderer->impl->flush(renderer);
  renderer->impl->set_target(renderer, NULL);
}