gstreamer/gst/videotestsrc/videotestsrc.c

/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

/* non-GST-specific stuff */

#include "gstvideotestsrc.h"
#include "videotestsrc.h"
#include <liboil/liboil.h>


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

static unsigned char
random_char (void)
{
  static unsigned int state;

  state *= 1103515245;
  state += 12345;
  return (state >> 16);
}

#if 0
static void
random_chars (unsigned char *dest, int nbytes)
{
  int i;
  static unsigned int state;

  for (i = 0; i < nbytes; i++) {
    state *= 1103515245;
    state += 12345;
    dest[i] = (state >> 16);
  }
}
#endif

#if 0
static void
paint_rect_random (unsigned char *dest, int stride, int x, int y, int w, int h)
{
  unsigned char *d = dest + stride * y + x;
  int i;

  for (i = 0; i < h; i++) {
    random_chars (d, w);
    d += stride;
  }
}
#endif

#if 0
static void
paint_rect (unsigned char *dest, int stride, int x, int y, int w, int h,
    unsigned char color)
{
  unsigned char *d = dest + stride * y + x;
  int i;

  for (i = 0; i < h; i++) {
    oil_splat_u8_ns (d, &color, w);
    d += stride;
  }
}
#endif

#if 0
static void
paint_rect_s2 (unsigned char *dest, int stride, int x, int y, int w, int h,
    unsigned char col)
{
  unsigned char *d = dest + stride * y + x * 2;
  unsigned char *dp;
  int i, j;

  for (i = 0; i < h; i++) {
    dp = d;
    for (j = 0; j < w; j++) {
      *dp = col;
      dp += 2;
    }
    d += stride;
  }
}
#endif

#if 0
static void
paint_rect2 (unsigned char *dest, int stride, int x, int y, int w, int h,
    unsigned char *col)
{
  unsigned char *d = dest + stride * y + x * 2;
  unsigned char *dp;
  int i, j;

  for (i = 0; i < h; i++) {
    dp = d;
    for (j = 0; j < w; j++) {
      *dp++ = col[0];
      *dp++ = col[1];
    }
    d += stride;
  }
}
#endif

#if 0
static void
paint_rect3 (unsigned char *dest, int stride, int x, int y, int w, int h,
    unsigned char *col)
{
  unsigned char *d = dest + stride * y + x * 3;
  unsigned char *dp;
  int i, j;

  for (i = 0; i < h; i++) {
    dp = d;
    for (j = 0; j < w; j++) {
      *dp++ = col[0];
      *dp++ = col[1];
      *dp++ = col[2];
    }
    d += stride;
  }
}
#endif

#if 0
static void
paint_rect4 (unsigned char *dest, int stride, int x, int y, int w, int h,
    unsigned char *col)
{
  unsigned char *d = dest + stride * y + x * 4;
  unsigned char *dp;
  int i, j;

  for (i = 0; i < h; i++) {
    dp = d;
    for (j = 0; j < w; j++) {
      *dp++ = col[0];
      *dp++ = col[1];
      *dp++ = col[2];
      *dp++ = col[3];
    }
    d += stride;
  }
}
#endif

#if 0
static void
paint_rect_s4 (unsigned char *dest, int stride, int x, int y, int w, int h,
    unsigned char col)
{
  unsigned char *d = dest + stride * y + x * 4;
  unsigned char *dp;
  int i, j;

  for (i = 0; i < h; i++) {
    dp = d;
    for (j = 0; j < w; j++) {
      *dp = col;
      dp += 4;
    }
    d += stride;
  }
}
#endif

enum
{
  COLOR_WHITE = 0,
  COLOR_YELLOW,
  COLOR_CYAN,
  COLOR_GREEN,
  COLOR_MAGENTA,
  COLOR_RED,
  COLOR_BLUE,
  COLOR_BLACK,
  COLOR_NEG_I,
  COLOR_POS_Q,
  COLOR_SUPER_BLACK,
  COLOR_DARK_GREY
};

static struct vts_color_struct vts_colors[] = {
  /* 100% white */
  {255, 128, 128, 255, 255, 255},
  /* yellow */
  {226, 0, 155, 255, 255, 0},
  /* cyan */
  {179, 170, 0, 0, 255, 255},
  /* green */
  {150, 46, 21, 0, 255, 0},
  /* magenta */
  {105, 212, 235, 255, 0, 255},
  /* red */
  {76, 85, 255, 255, 0, 0},
  /* blue */
  {29, 255, 107, 0, 0, 255},
  /* black */
  {16, 128, 128, 0, 0, 0},
  /* -I */
  {16, 198, 21, 0, 0, 128},
  /* +Q */
  {16, 235, 198, 0, 128, 255},
  /* superblack */
  {0, 128, 128, 0, 0, 0},
  /* 5% grey */
  {32, 128, 128, 32, 32, 32},
};


#if 0

/*                        wht  yel  cya  grn  mag  red  blu  blk   -I    Q, superblack, dark grey */
static int y_colors[] = { 255, 226, 179, 150, 105, 76, 29, 16, 16, 16, 0, 32 };
static int u_colors[] =
    { 128, 0, 170, 46, 212, 85, 255, 128, 198, 235, 128, 128 };
static int v_colors[] =
    { 128, 155, 0, 21, 235, 255, 107, 128, 21, 198, 128, 128 };

/*                        wht  yel  cya  grn  mag  red  blu  blk   -I    Q  superblack, dark grey */
static int r_colors[] = { 255, 255, 0, 0, 255, 255, 0, 0, 0, 0, 0, 32 };
static int g_colors[] = { 255, 255, 255, 255, 0, 0, 0, 0, 0, 128, 0, 32 };
static int b_colors[] = { 255, 0, 255, 0, 255, 0, 255, 0, 128, 255, 0, 32 };
#endif


static void paint_setup_I420 (paintinfo * p, char *dest);
static void paint_setup_YV12 (paintinfo * p, char *dest);
static void paint_setup_YUY2 (paintinfo * p, char *dest);
static void paint_setup_UYVY (paintinfo * p, char *dest);
static void paint_setup_YVYU (paintinfo * p, char *dest);
static void paint_setup_IYU2 (paintinfo * p, char *dest);
static void paint_setup_Y41B (paintinfo * p, char *dest);
static void paint_setup_Y42B (paintinfo * p, char *dest);
static void paint_setup_Y800 (paintinfo * p, char *dest);

#if 0
static void paint_setup_IMC1 (paintinfo * p, char *dest);
static void paint_setup_IMC2 (paintinfo * p, char *dest);
static void paint_setup_IMC3 (paintinfo * p, char *dest);
static void paint_setup_IMC4 (paintinfo * p, char *dest);
#endif
static void paint_setup_YUV9 (paintinfo * p, char *dest);
static void paint_setup_YVU9 (paintinfo * p, char *dest);
static void paint_setup_xRGB8888 (paintinfo * p, char *dest);
static void paint_setup_xBGR8888 (paintinfo * p, char *dest);
static void paint_setup_RGBx8888 (paintinfo * p, char *dest);
static void paint_setup_BGRx8888 (paintinfo * p, char *dest);
static void paint_setup_RGB888 (paintinfo * p, char *dest);
static void paint_setup_BGR888 (paintinfo * p, char *dest);
static void paint_setup_RGB565 (paintinfo * p, char *dest);
static void paint_setup_xRGB1555 (paintinfo * p, char *dest);

static void paint_hline_I420 (paintinfo * p, int x, int y, int w);
static void paint_hline_YUY2 (paintinfo * p, int x, int y, int w);
static void paint_hline_IYU2 (paintinfo * p, int x, int y, int w);
static void paint_hline_Y41B (paintinfo * p, int x, int y, int w);
static void paint_hline_Y42B (paintinfo * p, int x, int y, int w);
static void paint_hline_Y800 (paintinfo * p, int x, int y, int w);

#if 0
static void paint_hline_IMC1 (paintinfo * p, int x, int y, int w);
#endif
static void paint_hline_YUV9 (paintinfo * p, int x, int y, int w);
static void paint_hline_str4 (paintinfo * p, int x, int y, int w);
static void paint_hline_str3 (paintinfo * p, int x, int y, int w);
static void paint_hline_RGB565 (paintinfo * p, int x, int y, int w);
static void paint_hline_xRGB1555 (paintinfo * p, int x, int y, int w);

struct fourcc_list_struct fourcc_list[] = {
/* packed */
  {"YUY2", "YUY2", 16, paint_setup_YUY2, paint_hline_YUY2},
  {"UYVY", "UYVY", 16, paint_setup_UYVY, paint_hline_YUY2},
  {"Y422", "Y422", 16, paint_setup_UYVY, paint_hline_YUY2},
  {"UYNV", "UYNV", 16, paint_setup_UYVY, paint_hline_YUY2},     /* FIXME: UYNV? */
  {"YVYU", "YVYU", 16, paint_setup_YVYU, paint_hline_YUY2},

  /* interlaced */
  /*{ "IUYV", "IUY2", 16, paint_setup_YVYU, paint_hline_YUY2 }, */

  /* inverted */
  /*{ "cyuv", "cyuv", 16, paint_setup_YVYU, paint_hline_YUY2 }, */

  /*{ "Y41P", "Y41P", 12, paint_setup_YVYU, paint_hline_YUY2 }, */

  /* interlaced */
  /*{ "IY41", "IY41", 12, paint_setup_YVYU, paint_hline_YUY2 }, */

  /*{ "Y211", "Y211", 8, paint_setup_YVYU, paint_hline_YUY2 }, */

  /*{ "Y41T", "Y41T", 12, paint_setup_YVYU, paint_hline_YUY2 }, */
  /*{ "Y42P", "Y42P", 16, paint_setup_YVYU, paint_hline_YUY2 }, */
  /*{ "CLJR", "CLJR", 8, paint_setup_YVYU, paint_hline_YUY2 }, */
  /*{ "IYU1", "IYU1", 12, paint_setup_YVYU, paint_hline_YUY2 }, */
  {"IYU2", "IYU2", 24, paint_setup_IYU2, paint_hline_IYU2},

/* planar */
  /* YVU9 */
  {"YVU9", "YVU9", 9, paint_setup_YVU9, paint_hline_YUV9},
  /* YUV9 */
  {"YUV9", "YUV9", 9, paint_setup_YUV9, paint_hline_YUV9},
  /* IF09 */
  /* YV12 */
  {"YV12", "YV12", 12, paint_setup_YV12, paint_hline_I420},
  /* I420 */
  {"I420", "I420", 12, paint_setup_I420, paint_hline_I420},
  /* NV12 */
  /* NV21 */
#if 0
  /* IMC1 */
  {"IMC1", "IMC1", 16, paint_setup_IMC1, paint_hline_IMC1},
  /* IMC2 */
  {"IMC2", "IMC2", 12, paint_setup_IMC2, paint_hline_IMC1},
  /* IMC3 */
  {"IMC3", "IMC3", 16, paint_setup_IMC3, paint_hline_IMC1},
  /* IMC4 */
  {"IMC4", "IMC4", 12, paint_setup_IMC4, paint_hline_IMC1},
#endif
  /* CLPL */
  /* Y41B */
  {"Y41B", "Y41B", 12, paint_setup_Y41B, paint_hline_Y41B},
  /* Y42B */
  {"Y42B", "Y42B", 16, paint_setup_Y42B, paint_hline_Y42B},
  /* Y800 grayscale */
  {"Y800", "Y800", 8, paint_setup_Y800, paint_hline_Y800},

  {"RGB ", "xRGB8888", 32, paint_setup_xRGB8888, paint_hline_str4, 1, 24,
      0x00ff0000, 0x0000ff00, 0x000000ff},
  {"RGB ", "xBGR8888", 32, paint_setup_xBGR8888, paint_hline_str4, 1, 24,
      0x000000ff, 0x0000ff00, 0x00ff0000},
  {"RGB ", "RGBx8888", 32, paint_setup_RGBx8888, paint_hline_str4, 1, 24,
      0xff000000, 0x00ff0000, 0x0000ff00},
  {"RGB ", "BGRx8888", 32, paint_setup_BGRx8888, paint_hline_str4, 1, 24,
      0x0000ff00, 0x00ff0000, 0xff000000},
  {"RGB ", "RGB888", 24, paint_setup_RGB888, paint_hline_str3, 1, 24,
      0x00ff0000, 0x0000ff00, 0x000000ff},
  {"RGB ", "BGR888", 24, paint_setup_BGR888, paint_hline_str3, 1, 24,
      0x000000ff, 0x0000ff00, 0x00ff0000},
  {"RGB ", "RGB565", 16, paint_setup_RGB565, paint_hline_RGB565, 1, 16,
      0x0000f800, 0x000007e0, 0x0000001f},
  {"RGB ", "xRGB1555", 16, paint_setup_xRGB1555, paint_hline_xRGB1555, 1, 15,
      0x00007c00, 0x000003e0, 0x0000001f},
};
int n_fourccs = sizeof (fourcc_list) / sizeof (fourcc_list[0]);

struct fourcc_list_struct *
paintinfo_find_by_structure (const GstStructure * structure)
{
  int i;
  const char *media_type = gst_structure_get_name (structure);
  int ret;

  g_return_val_if_fail (structure, NULL);

  if (strcmp (media_type, "video/x-raw-yuv") == 0) {
    char *s;
    int fourcc;
    guint32 format;

    ret = gst_structure_get_fourcc (structure, "format", &format);
    if (!ret)
      return NULL;
    for (i = 0; i < n_fourccs; i++) {
      s = fourcc_list[i].fourcc;
      //g_print("testing " GST_FOURCC_FORMAT " and %s\n", GST_FOURCC_ARGS(format), s);
      fourcc = GST_MAKE_FOURCC (s[0], s[1], s[2], s[3]);
      if (fourcc == format) {
        return fourcc_list + i;
      }
    }
  } else if (strcmp (media_type, "video/x-raw-rgb") == 0) {
    int red_mask;
    int green_mask;
    int blue_mask;
    int depth;
    int bpp;

    ret = gst_structure_get_int (structure, "red_mask", &red_mask);
    ret &= gst_structure_get_int (structure, "green_mask", &green_mask);
    ret &= gst_structure_get_int (structure, "blue_mask", &blue_mask);
    ret &= gst_structure_get_int (structure, "depth", &depth);
    ret &= gst_structure_get_int (structure, "bpp", &bpp);

    for (i = 0; i < n_fourccs; i++) {
      if (strcmp (fourcc_list[i].fourcc, "RGB ") == 0 &&
          fourcc_list[i].red_mask == red_mask &&
          fourcc_list[i].green_mask == green_mask &&
          fourcc_list[i].blue_mask == blue_mask &&
          fourcc_list[i].depth == depth && fourcc_list[i].bitspp == bpp) {
        return fourcc_list + i;

      }
    }
    return NULL;
  }

  g_critical ("format not found for media type %s", media_type);

  return NULL;
}

struct fourcc_list_struct *
paintrect_find_fourcc (int find_fourcc)
{
  int i;

  for (i = 0; i < n_fourccs; i++) {
    char *s;
    int fourcc;

    s = fourcc_list[i].fourcc;
    fourcc = GST_MAKE_FOURCC (s[0], s[1], s[2], s[3]);
    if (find_fourcc == fourcc) {
      /* If YUV format, it's good */
      if (!fourcc_list[i].ext_caps) {
        return fourcc_list + i;
      }

      return fourcc_list + i;
    }
  }
  return NULL;
}

struct fourcc_list_struct *
paintrect_find_name (const char *name)
{
  int i;

  for (i = 0; i < n_fourccs; i++) {
    if (strcmp (name, fourcc_list[i].name) == 0) {
      return fourcc_list + i;
    }
  }
  return NULL;
}


GstStructure *
paint_get_structure (struct fourcc_list_struct * format)
{
  unsigned int fourcc;

  g_return_val_if_fail (format, NULL);

  fourcc =
      GST_MAKE_FOURCC (format->fourcc[0], format->fourcc[1], format->fourcc[2],
      format->fourcc[3]);

  if (format->ext_caps) {
    int endianness;

    if (format->bitspp == 16) {
      endianness = G_BYTE_ORDER;
    } else {
      endianness = G_BIG_ENDIAN;
    }
    return gst_structure_new ("video/x-raw-rgb",
        "bpp", G_TYPE_INT, format->bitspp,
        "endianness", G_TYPE_INT, endianness,
        "depth", G_TYPE_INT, format->depth,
        "red_mask", G_TYPE_INT, format->red_mask,
        "green_mask", G_TYPE_INT, format->green_mask,
        "blue_mask", G_TYPE_INT, format->blue_mask, NULL);
  } else {
    return gst_structure_new ("video/x-raw-yuv",
        "format", GST_TYPE_FOURCC, fourcc, NULL);
  }
}

/* returns the size in bytes for one video frame of the given dimensions
 * given the fourcc in GstVideotestsrc */
int
gst_videotestsrc_get_size (GstVideotestsrc * v, int w, int h)
{
  paintinfo pi = { 0 };
  paintinfo *p = &pi;
  struct fourcc_list_struct *fourcc;

  p->width = w;
  p->height = h;
  fourcc = v->fourcc;
  if (fourcc == NULL)
    return 0;

  fourcc->paint_setup (p, NULL);

  return (unsigned long) p->endptr;
}

void
gst_videotestsrc_smpte (GstVideotestsrc * v, unsigned char *dest, int w, int h)
{
  int i;
  int y1, y2;
  int j;
  paintinfo pi;
  paintinfo *p = &pi;
  struct fourcc_list_struct *fourcc;

  p->width = w;
  p->height = h;
  fourcc = v->fourcc;
  if (fourcc == NULL)
    return;

  fourcc->paint_setup (p, dest);
  p->paint_hline = fourcc->paint_hline;

  y1 = 2 * h / 3;
  y2 = h * 0.75;

  /* color bars */
  for (i = 0; i < 7; i++) {
    int x1 = i * w / 7;
    int x2 = (i + 1) * w / 7;

    p->color = vts_colors + i;
    for (j = 0; j < y1; j++) {
      p->paint_hline (p, x1, j, (x2 - x1));
    }
  }

  /* inverse blue bars */
  for (i = 0; i < 7; i++) {
    int x1 = i * w / 7;
    int x2 = (i + 1) * w / 7;
    int k;

    if (i & 1) {
      k = 7;
    } else {
      k = 6 - i;
    }
    p->color = vts_colors + k;
    for (j = y1; j < y2; j++) {
      p->paint_hline (p, x1, j, (x2 - x1));
    }
  }

  /* -I, white, Q regions */
  for (i = 0; i < 3; i++) {
    int x1 = i * w / 6;
    int x2 = (i + 1) * w / 6;
    int k;

    if (i == 0) {
      k = 8;
    } else if (i == 1) {
      k = 0;
    } else
      k = 9;

    p->color = vts_colors + k;
    for (j = y2; j < h; j++) {
      p->paint_hline (p, x1, j, (x2 - x1));
    }
  }

  /* superblack, black, dark grey */
  for (i = 0; i < 3; i++) {
    int x1 = w / 2 + i * w / 12;
    int x2 = w / 2 + (i + 1) * w / 12;
    int k;

    if (i == 0) {
      k = COLOR_SUPER_BLACK;
    } else if (i == 1) {
      k = COLOR_BLACK;
    } else
      k = COLOR_DARK_GREY;

    p->color = vts_colors + k;
    for (j = y2; j < h; j++) {
      p->paint_hline (p, x1, j, (x2 - x1));
    }
  }

  {
    int x1 = w * 3 / 4;
    struct vts_color_struct color;

    color = vts_colors[COLOR_BLACK];
    p->color = &color;

    for (i = x1; i < w; i++) {
      for (j = y2; j < h; j++) {
        /* FIXME not strictly correct */
        color.Y = random_char ();
        color.R = color.Y;
        color.G = color.Y;
        color.B = color.Y;
        p->paint_hline (p, i, j, 1);
      }
    }

  }
}

void
gst_videotestsrc_snow (GstVideotestsrc * v, unsigned char *dest, int w, int h)
{
  int i;
  int j;
  paintinfo pi;
  paintinfo *p = &pi;
  struct fourcc_list_struct *fourcc;
  struct vts_color_struct color;

  p->width = w;
  p->height = h;
  fourcc = v->fourcc;
  if (fourcc == NULL)
    return;

  fourcc->paint_setup (p, dest);
  p->paint_hline = fourcc->paint_hline;

  color = vts_colors[COLOR_BLACK];
  p->color = &color;

  for (i = 0; i < w; i++) {
    for (j = 0; j < h; j++) {
      /* FIXME not strictly correct */
      color.Y = random_char ();
      color.R = color.Y;
      color.G = color.Y;
      color.B = color.Y;
      p->paint_hline (p, i, j, 1);
    }
  }
}

void
gst_videotestsrc_black (GstVideotestsrc * v, unsigned char *dest, int w, int h)
{
  int i;
  paintinfo pi;
  paintinfo *p = &pi;
  struct fourcc_list_struct *fourcc;

  p->width = w;
  p->height = h;
  fourcc = v->fourcc;
  if (fourcc == NULL)
    return;

  fourcc->paint_setup (p, dest);
  p->paint_hline = fourcc->paint_hline;

  p->color = vts_colors + COLOR_BLACK;

  for (i = 0; i < h; i++) {
    p->paint_hline (p, 0, i, w);
  }
}

#define ROUND_UP_2(x)  (((x)+1)&~1)
#define ROUND_UP_4(x)  (((x)+3)&~3)
#define ROUND_UP_8(x)  (((x)+7)&~7)

static void
paint_setup_I420 (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->ystride = ROUND_UP_4 (p->width);
  p->up = p->yp + p->ystride * ROUND_UP_2 (p->height);
  p->ustride = ROUND_UP_8 (p->width) / 2;
  p->vp = p->up + p->ustride * ROUND_UP_2 (p->height) / 2;
  p->vstride = ROUND_UP_8 (p->ystride) / 2;
  p->endptr = p->vp + p->vstride * ROUND_UP_2 (p->height) / 2;
}

static void
paint_hline_I420 (paintinfo * p, int x, int y, int w)
{
  int x1 = x / 2;
  int x2 = (x + w) / 2;
  int offset = y * p->ystride;
  int offset1 = (y / 2) * p->ustride;

  oil_splat_u8_ns (p->yp + offset + x, &p->color->Y, w);
  oil_splat_u8_ns (p->up + offset1 + x1, &p->color->U, x2 - x1);
  oil_splat_u8_ns (p->vp + offset1 + x1, &p->color->V, x2 - x1);
}

static void
paint_setup_YV12 (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->ystride = ROUND_UP_4 (p->width);
  p->vp = p->yp + p->ystride * ROUND_UP_2 (p->height);
  p->vstride = ROUND_UP_8 (p->ystride) / 2;
  p->up = p->vp + p->vstride * ROUND_UP_2 (p->height) / 2;
  p->ustride = ROUND_UP_8 (p->ystride) / 2;
  p->endptr = p->up + p->ustride * ROUND_UP_2 (p->height) / 2;
}

static void
paint_setup_YUY2 (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->up = dest + 1;
  p->vp = dest + 3;
  p->ystride = ROUND_UP_2 (p->width) * 2;
  p->endptr = dest + p->ystride * p->height;
}

static void
paint_setup_UYVY (paintinfo * p, char *dest)
{
  p->yp = dest + 1;
  p->up = dest;
  p->vp = dest + 2;
  p->ystride = ROUND_UP_2 (p->width) * 2;
  p->endptr = dest + p->ystride * p->height;
}

static void
paint_setup_YVYU (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->up = dest + 3;
  p->vp = dest + 1;
  p->ystride = ROUND_UP_2 (p->width * 2);
  p->endptr = dest + p->ystride * p->height;
}

static void
paint_hline_YUY2 (paintinfo * p, int x, int y, int w)
{
  int x1 = x / 2;
  int x2 = (x + w) / 2;
  int offset;

  offset = y * p->ystride;
  oil_splat_u8 (p->yp + offset + x * 2, 2, &p->color->Y, w);
  oil_splat_u8 (p->up + offset + x1 * 4, 4, &p->color->U, x2 - x1);
  oil_splat_u8 (p->vp + offset + x1 * 4, 4, &p->color->V, x2 - x1);
}

static void
paint_setup_IYU2 (paintinfo * p, char *dest)
{
  /* untested */
  p->yp = dest + 1;
  p->up = dest + 0;
  p->vp = dest + 2;
  p->ystride = ROUND_UP_4 (p->width * 3);
  p->endptr = dest + p->ystride * p->height;
}

static void
paint_hline_IYU2 (paintinfo * p, int x, int y, int w)
{
  int offset;

  offset = y * p->ystride;
  oil_splat_u8 (p->yp + offset + x * 3, 3, &p->color->Y, w);
  oil_splat_u8 (p->up + offset + x * 3, 3, &p->color->U, w);
  oil_splat_u8 (p->vp + offset + x * 3, 3, &p->color->V, w);
}

static void
paint_setup_Y41B (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->ystride = ROUND_UP_4 (p->width);
  p->up = p->yp + p->ystride * p->height;
  p->ustride = ROUND_UP_8 (p->width) / 4;
  p->vp = p->up + p->ustride * p->height;
  p->vstride = ROUND_UP_8 (p->width) / 4;
  p->endptr = p->vp + p->vstride * p->height;
}

static void
paint_hline_Y41B (paintinfo * p, int x, int y, int w)
{
  int x1 = x / 4;
  int x2 = (x + w) / 4;
  int offset = y * p->ystride;
  int offset1 = y * p->ustride;

  oil_splat_u8_ns (p->yp + offset + x, &p->color->Y, w);
  oil_splat_u8_ns (p->up + offset1 + x1, &p->color->U, x2 - x1);
  oil_splat_u8_ns (p->vp + offset1 + x1, &p->color->V, x2 - x1);
}

static void
paint_setup_Y42B (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->ystride = ROUND_UP_4 (p->width);
  p->up = p->yp + p->ystride * p->height;
  p->ustride = ROUND_UP_8 (p->width) / 2;
  p->vp = p->up + p->ustride * p->height;
  p->vstride = ROUND_UP_8 (p->width) / 2;
  p->endptr = p->vp + p->vstride * p->height;
}

static void
paint_hline_Y42B (paintinfo * p, int x, int y, int w)
{
  int x1 = x / 2;
  int x2 = (x + w) / 2;
  int offset = y * p->ystride;
  int offset1 = y * p->ustride;

  oil_splat_u8_ns (p->yp + offset + x, &p->color->Y, w);
  oil_splat_u8_ns (p->up + offset1 + x1, &p->color->U, x2 - x1);
  oil_splat_u8_ns (p->vp + offset1 + x1, &p->color->V, x2 - x1);
}

static void
paint_setup_Y800 (paintinfo * p, char *dest)
{
  /* untested */
  p->yp = dest;
  p->ystride = ROUND_UP_4 (p->width);
  p->endptr = dest + p->ystride * p->height;
}

static void
paint_hline_Y800 (paintinfo * p, int x, int y, int w)
{
  int offset = y * p->ystride;

  oil_splat_u8_ns (p->yp + offset + x, &p->color->Y, w);
}

#if 0
static void
paint_setup_IMC1 (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->up = dest + p->width * p->height;
  p->vp = dest + p->width * p->height + p->width * p->height / 2;
}

static void
paint_setup_IMC2 (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->vp = dest + p->width * p->height;
  p->up = dest + p->width * p->height + p->width / 2;
}

static void
paint_setup_IMC3 (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->up = dest + p->width * p->height + p->width * p->height / 2;
  p->vp = dest + p->width * p->height;
}

static void
paint_setup_IMC4 (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->vp = dest + p->width * p->height + p->width / 2;
  p->up = dest + p->width * p->height;
}

static void
paint_hline_IMC1 (paintinfo * p, int x, int y, int w)
{
  int x1 = x / 2;
  int x2 = (x + w) / 2;
  int offset = y * p->width;
  int offset1 = (y / 2) * p->width;

  oil_splat_u8_ns (p->yp + offset + x, &p->color->Y, w);
  oil_splat_u8_ns (p->up + offset1 + x1, &p->color->U, x2 - x1);
  oil_splat_u8_ns (p->vp + offset1 + x1, &p->color->V, x2 - x1);
}
#endif

static void
paint_setup_YVU9 (paintinfo * p, char *dest)
{
  int h = ROUND_UP_4 (p->height);

  p->yp = dest;
  p->ystride = ROUND_UP_4 (p->width);
  p->vp = p->yp + p->ystride * ROUND_UP_4 (p->height);
  p->vstride = ROUND_UP_4 (p->ystride / 4);
  p->up = p->vp + p->vstride * ROUND_UP_4 (h / 4);
  p->ustride = ROUND_UP_4 (p->ystride / 4);
  p->endptr = p->up + p->ustride * ROUND_UP_4 (h / 4);
}

static void
paint_setup_YUV9 (paintinfo * p, char *dest)
{
  /* untested */
  int h = ROUND_UP_4 (p->height);

  p->yp = dest;
  p->ystride = ROUND_UP_4 (p->width);
  p->up = p->yp + p->ystride * h;
  p->ustride = ROUND_UP_4 (p->ystride / 4);
  p->vp = p->up + p->ustride * ROUND_UP_4 (h / 4);
  p->vstride = ROUND_UP_4 (p->ystride / 4);
  p->endptr = p->vp + p->vstride * ROUND_UP_4 (h / 4);
}

static void
paint_hline_YUV9 (paintinfo * p, int x, int y, int w)
{
  int x1 = x / 4;
  int x2 = (x + w) / 4;
  int offset = y * p->ystride;
  int offset1 = (y / 4) * p->ustride;

  oil_splat_u8_ns (p->yp + offset + x, &p->color->Y, w);
  oil_splat_u8_ns (p->up + offset1 + x1, &p->color->U, x2 - x1);
  oil_splat_u8_ns (p->vp + offset1 + x1, &p->color->V, x2 - x1);
}

static void
paint_setup_xRGB8888 (paintinfo * p, char *dest)
{
  p->yp = dest + 1;
  p->up = dest + 2;
  p->vp = dest + 3;
  p->ystride = p->width * 4;
  p->endptr = p->dest + p->ystride * p->height;
}

static void
paint_setup_xBGR8888 (paintinfo * p, char *dest)
{
  p->yp = dest + 3;
  p->up = dest + 2;
  p->vp = dest + 1;
  p->ystride = p->width * 4;
  p->endptr = p->dest + p->ystride * p->height;
}

static void
paint_setup_RGBx8888 (paintinfo * p, char *dest)
{
  p->yp = dest + 0;
  p->up = dest + 1;
  p->vp = dest + 2;
  p->ystride = p->width * 4;
  p->endptr = p->dest + p->ystride * p->height;
}

static void
paint_setup_BGRx8888 (paintinfo * p, char *dest)
{
  p->yp = dest + 2;
  p->up = dest + 1;
  p->vp = dest + 0;
  p->ystride = p->width * 4;
  p->endptr = p->dest + p->ystride * p->height;
}

static void
paint_setup_RGB888 (paintinfo * p, char *dest)
{
  p->yp = dest + 0;
  p->up = dest + 1;
  p->vp = dest + 2;
  p->ystride = ROUND_UP_4 (p->width * 3);
  p->endptr = p->dest + p->ystride * p->height;
}

static void
paint_setup_BGR888 (paintinfo * p, char *dest)
{
  p->yp = dest + 2;
  p->up = dest + 1;
  p->vp = dest + 0;
  p->ystride = ROUND_UP_4 (p->width * 3);
  p->endptr = p->dest + p->ystride * p->height;
}

static void
paint_hline_str4 (paintinfo * p, int x, int y, int w)
{
  int offset = y * p->ystride;

  oil_splat_u8 (p->yp + offset + x * 4, 4, &p->color->R, w);
  oil_splat_u8 (p->up + offset + x * 4, 4, &p->color->G, w);
  oil_splat_u8 (p->vp + offset + x * 4, 4, &p->color->B, w);
}

static void
paint_hline_str3 (paintinfo * p, int x, int y, int w)
{
  int offset = y * p->ystride;

  oil_splat_u8 (p->yp + offset + x * 3, 3, &p->color->R, w);
  oil_splat_u8 (p->up + offset + x * 3, 3, &p->color->G, w);
  oil_splat_u8 (p->vp + offset + x * 3, 3, &p->color->B, w);
}

static void
paint_setup_RGB565 (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->ystride = ROUND_UP_4 (p->width * 2);
  p->endptr = p->dest + p->ystride * p->height;
}

static void
paint_hline_RGB565 (paintinfo * p, int x, int y, int w)
{
  int offset = y * p->ystride;
  uint8_t a, b;

  a = (p->color->R & 0xf8) | (p->color->G >> 5);
  b = ((p->color->G << 3) & 0xe0) | (p->color->B >> 3);

#if G_BYTE_ORDER == G_LITTLE_ENDIAN
  oil_splat_u8 (p->yp + offset + x * 2 + 0, 2, &b, w);
  oil_splat_u8 (p->yp + offset + x * 2 + 1, 2, &a, w);
#else
  oil_splat_u8 (p->yp + offset + x * 2 + 0, 2, &a, w);
  oil_splat_u8 (p->yp + offset + x * 2 + 1, 2, &b, w);
#endif
}

static void
paint_setup_xRGB1555 (paintinfo * p, char *dest)
{
  p->yp = dest;
  p->ystride = ROUND_UP_4 (p->width * 2);
  p->endptr = p->dest + p->ystride * p->height;
}

static void
paint_hline_xRGB1555 (paintinfo * p, int x, int y, int w)
{
  int offset = y * p->ystride;
  uint8_t a, b;

  a = ((p->color->R >> 1) & 0x7c) | (p->color->G >> 6);
  b = ((p->color->G << 2) & 0xe0) | (p->color->B >> 3);

#if G_BYTE_ORDER == G_LITTLE_ENDIAN
  oil_splat_u8 (p->yp + offset + x * 2 + 0, 2, &b, w);
  oil_splat_u8 (p->yp + offset + x * 2 + 1, 2, &a, w);
#else
  oil_splat_u8 (p->yp + offset + x * 2 + 0, 2, &a, w);
  oil_splat_u8 (p->yp + offset + x * 2 + 1, 2, &b, w);
#endif
}