80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/* source/draw/sgl_draw_icon.c
|
|
*
|
|
* MIT License
|
|
*
|
|
* Copyright(c) 2023-present All contributors of SGL
|
|
* Document reference link: https://sgl-docs.readthedocs.io
|
|
*
|
|
* 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 <sgl_core.h>
|
|
#include <sgl_log.h>
|
|
#include <sgl_draw.h>
|
|
#include <sgl_math.h>
|
|
|
|
|
|
/**
|
|
* @brief draw icon with alpha
|
|
* @param surf surface
|
|
* @param area area of icon
|
|
* @param coords coords of icon
|
|
* @param alpha alpha of icon
|
|
* @param icon icon pixmap
|
|
* @return none
|
|
* @note This function is only for 4bpp icon bitmap
|
|
*/
|
|
void sgl_draw_icon( sgl_surf_t *surf, sgl_area_t *area, int16_t x, int16_t y, sgl_color_t color, uint8_t alpha, const sgl_icon_pixmap_t *icon)
|
|
{
|
|
const uint8_t *dot = icon->bitmap;
|
|
sgl_area_t clip = SGL_AREA_MAX;
|
|
sgl_color_t *buf = NULL;
|
|
int rel_x, rel_y, byte_x, dot_index;
|
|
uint8_t alpha_dot;
|
|
|
|
sgl_area_t icon_rect = {
|
|
.x1 = x,
|
|
.x2 = x + icon->width - 1,
|
|
.y1 = y,
|
|
.y2 = y + icon->height - 1,
|
|
};
|
|
|
|
if (!sgl_surf_clip(surf, &icon_rect, &clip)) {
|
|
return;
|
|
}
|
|
|
|
if (!sgl_area_selfclip(&clip, area)) {
|
|
return;
|
|
}
|
|
|
|
for (int y = clip.y1; y <= clip.y2; y++) {
|
|
buf = sgl_surf_get_buf(surf, clip.x1 - surf->x1, y - surf->y1);
|
|
rel_y = y - icon_rect.y1;
|
|
|
|
for (int x = clip.x1; x <= clip.x2; x++) {
|
|
rel_x = x - icon_rect.x1;
|
|
|
|
byte_x = rel_x >> 1;
|
|
dot_index = byte_x + (rel_y * (icon->width >> 1));
|
|
alpha_dot = (rel_x & 1) ? dot[dot_index] & 0xF : (dot[dot_index] >> 4);
|
|
alpha_dot = alpha_dot | (alpha_dot << 4);
|
|
*buf = (alpha == SGL_ALPHA_MAX ? sgl_color_mixer(color, *buf, alpha_dot) : sgl_color_mixer(sgl_color_mixer(color, *buf, alpha_dot), *buf, alpha));
|
|
buf++;
|
|
}
|
|
}
|
|
}
|