/*
* Draw a character to a context.
*/
static void draw_char(FT_Bitmap * bitmap, int x, int y, uint32_t fg, gfx_context_t * ctx) {
int i, j, p, q;
int x_max = x + bitmap->width;
int y_max = y + bitmap->rows;
for (j = y, q = 0; j < y_max; j++, q++) {
for ( i = x, p = 0; i < x_max; i++, p++) {
uint32_t a = _ALP(fg);
a = (a * bitmap->buffer[q * bitmap->width + p]) / 255;
uint32_t tmp = premultiply(rgba(_RED(fg),_GRE(fg),_BLU(fg),a));
SGFX(ctx->backbuffer,i,j,ctx->width) = alpha_blend_rgba(SGFX(ctx->backbuffer,i,j,ctx->width),tmp);
}
}
}
void draw_sprite(gfx_context_t * ctx, sprite_t * sprite, int32_t x, int32_t y) {
int32_t _left = max(x, 0);
int32_t _top = max(y, 0);
int32_t _right = min(x + sprite->width, ctx->width - 1);
int32_t _bottom = min(y + sprite->height, ctx->height - 1);
for (uint16_t _y = 0; _y < sprite->height; ++_y) {
for (uint16_t _x = 0; _x < sprite->width; ++_x) {
if (x + _x < _left || x + _x > _right || y + _y < _top || y + _y > _bottom)
continue;
if (sprite->alpha == ALPHA_MASK) {
GFX(ctx, x + _x, y + _y) = alpha_blend(GFX(ctx, x + _x, y + _y), SPRITE(sprite, _x, _y), SMASKS(sprite, _x, _y));
} else if (sprite->alpha == ALPHA_EMBEDDED) {
GFX(ctx, x + _x, y + _y) = alpha_blend_rgba(GFX(ctx, x + _x, y + _y), SPRITE(sprite, _x, _y));
} else if (sprite->alpha == ALPHA_INDEXED) {
if (SPRITE(sprite, _x, _y) != sprite->blank) {
GFX(ctx, x + _x, y + _y) = SPRITE(sprite, _x, _y) | 0xFF000000;
}
} else {
GFX(ctx, x + _x, y + _y) = SPRITE(sprite, _x, _y) | 0xFF000000;
}
}
}
}
