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

    Copyright(C) Jonas 'Sortie' Termansen 2014, 2015.

    This program is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the Free
    Software Foundation, either version 3 of the License, or (at your option)
    any later version.

    This program is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
    more details.

    You should have received a copy of the GNU General Public License along with
    this program. If not, see <http://www.gnu.org/licenses/>.

    framebuffer.h
    Framebuffer utilities.

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

#ifndef FRAMEBUFFER_H
#define FRAMEBUFFER_H

#include <stddef.h>
#include <stdint.h>

struct framebuffer
{
	size_t pitch;
	uint32_t* buffer;
	size_t xres;
	size_t yres;
};

static inline uint32_t framebuffer_get_pixel(const struct framebuffer fb,
                                             size_t x,
                                             size_t y)
{
	if ( fb.xres <= x || fb.yres <= y )
		return 0;
	return fb.buffer[y * fb.pitch + x];
}

static inline void framebuffer_set_pixel(const struct framebuffer fb,
                                         size_t x,
                                         size_t y,
                                         uint32_t value)
{
	if ( fb.xres <= x || fb.yres <= y )
		return;
	fb.buffer[y * fb.pitch + x] = value;
}

struct framebuffer framebuffer_crop(struct framebuffer fb,
                                    size_t left,
                                    size_t top,
                                    size_t width,
                                    size_t height);
void framebuffer_copy_to_framebuffer(const struct framebuffer dst,
                                     const struct framebuffer src);
void framebuffer_copy_to_framebuffer_blend(const struct framebuffer dst,
                                           const struct framebuffer src);
struct framebuffer framebuffer_crop_int(struct framebuffer fb,
                                        int left,
                                        int top,
                                        int width,
                                        int height);
struct framebuffer framebuffer_cut_left_x(struct framebuffer fb, int offset);
struct framebuffer framebuffer_cut_right_x(struct framebuffer fb, int offset);
struct framebuffer framebuffer_cut_top_y(struct framebuffer fb, int offset);
struct framebuffer framebuffer_cut_bottom_y(struct framebuffer fb, int offset);
struct framebuffer framebuffer_center_x(struct framebuffer fb, int x, int width);
struct framebuffer framebuffer_center_y(struct framebuffer fb, int y, int height);
struct framebuffer framebuffer_right_x(struct framebuffer fb, int x, int width);
struct framebuffer framebuffer_bottom_y(struct framebuffer fb, int y, int height);
struct framebuffer framebuffer_center_text_x(struct framebuffer fb, int x, const char* str);
struct framebuffer framebuffer_center_text_y(struct framebuffer fb, int y, const char* str);
struct framebuffer framebuffer_right_text_x(struct framebuffer fb, int x, const char* str);
struct framebuffer framebuffer_bottom_text_y(struct framebuffer fb, int y, const char* str);

#endif