toys/sww/source/texture.c

#include "texture_private.h"

#include <stddef.h>
#include <stdlib.h>
#include <string.h>

#include "sww/color.h"

struct swwTexture {
  swwImage *image;
};

swwTexture *swwTexture_LoadFromFile(const char *filepath) {
  swwTexture *o = (swwTexture *)malloc(sizeof(swwTexture));
  o->image = swwImage_Load(filepath);
  return o;
}

/* channels: 1, 3, 4 is supported */
swwTexture *swwTexture_LoadFromMemory(uint8_t *bitmap, int channels,
                                      uint32_t width, uint32_t height) {
  swwTexture *o = (swwTexture *)malloc(sizeof(swwTexture));
  o->image = swwImage_Create(width, height, 4);

  /* expand any channels to 4 channels */
  switch (channels) {
  case 1: {
    uint32_t i = 0;
    uint32_t j = 0;
    uint32_t idx = 0;
    uint32_t *p = NULL;
    for (j = 0; j < height; j++) {
      for (i = 0; i < width; i++, idx++) {
        p = (uint32_t *)o->image->buffer + idx;
        *p = Color_Gray(bitmap[idx]);
      }
    }
  } break;
  case 3: {
    uint32_t i = 0;
    uint32_t j = 0;
    uint32_t idx = 0;
    uint32_t *p = NULL;
    uint8_t *b = NULL;
    for (j = 0; j < height; j++) {
      for (i = 0; i < width; i++, idx++) {
        idx = j * width + i;
        p = (uint32_t *)o->image->buffer + idx;
        b = (uint8_t *)bitmap + idx * 3;
        *p = Color_RGB(b[0], b[1], b[2]);
      }
    }
  } break;
  case 4:
  default:
    memcpy(o->image->buffer, bitmap, width * height * 4);
    break;
  }

  return o;
}

void swwTexture_Destroy(swwTexture *o) {
  swwImage_Destroy(o->image);
  free(o);
}

void swwTexture_GetSize(swwTexture *o, uint32_t *width, uint32_t *height) {
  if (width != NULL) {
    *width = o->image->width;
  }

  if (height != NULL) {
    *height = o->image->height;
  }
}

uint32_t swwTexture_Get(swwTexture *o, uint32_t x, uint32_t y) {
  if (y >= o->image->height || x >= o->image->width) {
    return 0;
  }
  return swwImage_GetPixel(o->image, x, y);
}

void swwTexture_Set(swwTexture *o, uint32_t x, uint32_t y, uint32_t color) {
  if (y >= o->image->height || x >= o->image->width) {
    return;
  }
  swwImage_SetPixel(o->image, x, y, color);
}

swwTexture *swwTexture_ZoomTo(swwTexture *o, float zoom, int mode) {
  return NULL;
}

swwTexture *swwTexture_Area(swwTexture *o, int x, int y, int width,
                            int height) {
  return NULL;
}

swwImage *swwTexture_GetImage(swwTexture *o) { return o->image; }