Function rend_DrawScaledBitmap

renderer/HardwareBaseGPU.cpp:242–290

draws a scaled 2d bitmap to our buffer

// draws a scaled 2d bitmap to our buffer
void rend_DrawScaledBitmap(int x1, int y1, int x2, int y2, int bm, float u0, float v0, float u1, float v1, int color,
                           float *alphas) {
  g3Point *ptr_pnts[4];
  g3Point pnts[4];
  float r, g, b;
  if (color != -1) {
    r = GR_COLOR_RED(color) / 255.0;
    g = GR_COLOR_GREEN(color) / 255.0;
    b = GR_COLOR_BLUE(color) / 255.0;
  }
  for (int i = 0; i < 4; i++) {
    if (color == -1)
      pnts[i].p3_l = 1.0;
    else {
      pnts[i].p3_r = r;
      pnts[i].p3_g = g;
      pnts[i].p3_b = b;
    }
    if (alphas) {
      pnts[i].p3_a = alphas[i];
    }

    pnts[i].p3_z = 1.0f;
    pnts[i].p3_flags = PF_PROJECTED;
  }

  pnts[0].p3_sx = x1;
  pnts[0].p3_sy = y1;
  pnts[0].p3_u = u0;
  pnts[0].p3_v = v0;
  pnts[1].p3_sx = x2;
  pnts[1].p3_sy = y1;
  pnts[1].p3_u = u1;
  pnts[1].p3_v = v0;
  pnts[2].p3_sx = x2;
  pnts[2].p3_sy = y2;
  pnts[2].p3_u = u1;
  pnts[2].p3_v = v1;
  pnts[3].p3_sx = x1;
  pnts[3].p3_sy = y2;
  pnts[3].p3_u = u0;
  pnts[3].p3_v = v1;
  ptr_pnts[0] = &pnts[0];
  ptr_pnts[1] = &pnts[1];
  ptr_pnts[2] = &pnts[2];
  ptr_pnts[3] = &pnts[3];
  rend_SetTextureType(TT_LINEAR);
  rend_DrawPolygon2D(bm, ptr_pnts, 4);
}

//	given a chunked bitmap, renders it.
void rend_DrawChunkedBitmap(chunked_bitmap *chunk, int x, int y, uint8_t alpha) {