forked from kdx/jtmm2-old
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
#include <gint/display.h>
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#include "conf.h"
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#include "level.h"
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#include "camera.h"
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#define VEC_PRECISE_HALF_DISP (Vec){DWIDTH * VEC_PRECISION / (2 * SCALE), DHEIGHT * VEC_PRECISION / (2 * SCALE)}
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void level_step(const Level *level) {
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}
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void level_draw(const Level *level, Camera *camera) {
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for (int i = 0; i < level->layers_count; ++i) {
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layer_draw(level, camera, i);
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}
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}
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void layer_draw(const Level *level, Camera *camera, uint layer_id) {
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const uint8_t *layer = level->layers[layer_id];
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Vec display_tl, display_br;
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vec_cpy(&display_tl, camera->pos);
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vec_cpy(&display_br, display_tl);
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vec_sub(&display_tl, VEC_PRECISE_HALF_DISP);
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vec_add(&display_br, VEC_PRECISE_HALF_DISP);
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vec_div(&display_tl, TILE_SIZE);
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vec_div(&display_br, TILE_SIZE);
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int start_x = (display_tl.x > 0) ? display_tl.x : 0;
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int start_y = (display_tl.y > 0) ? display_tl.y : 0;
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int end_x = (display_br.x < level->width) ? display_br.x + 1 : level->width;
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int end_y = (display_br.y < level->height) ? display_br.y + 1 : level->height;
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for (int y = start_y; y < end_y; ++y) {
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for (int x = start_x; x < end_x; ++x) {
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const uint8_t cell = layer[x + y * level->width];
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#ifdef FX9860G
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const int color = C_LIGHT;
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#endif /* FX9860G */
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#ifdef FXCG50
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const int color = C_GREEN;
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#endif /* FXCG50 */
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if (cell == 1) {
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Vec tl = {x, y};
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Vec br;
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vec_mul(&tl, TILE_SIZE);
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vec_div(&tl, VEC_PRECISION);
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vec_sub(&tl, camera->offset);
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vec_mul(&tl, SCALE);
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vec_cpy(&br, tl);
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vec_add(&br, (Vec){TILE_SIZE / VEC_PRECISION * SCALE - 1,
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TILE_SIZE / VEC_PRECISION * SCALE - 1});
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vec_drect(tl, br, color);
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}
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}
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}
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}
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