xm_span.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

   register GLuint i;
   register GLuint *ptr = PIXEL_ADDR4(xrb, x, y);
   if (mask) {
      for (i=0;i<n;i++) {
         if (mask[i]) {
            ptr[i] = PACK_8A8B8G8R( rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP], 255 );
         }
      }
   }
   else {
      /* draw all pixels */
      for (i=0;i<n;i++) {
         ptr[i] = PACK_8A8B8G8R( rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP], 255 );
      }
   }
}

/*
 * Write a span of PF_8A8R8G8B-format pixels to an ximage.
 */
static void put_row_8A8R8G8B_ximage( PUT_ROW_ARGS )
{
   const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;
   GET_XRB(xrb);
   register GLuint i;
   register GLuint *ptr = PIXEL_ADDR4(xrb, x, y);
   if (mask) {
      for (i=0;i<n;i++) {
         if (mask[i]) {
            ptr[i] = PACK_8A8R8G8B( rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP], rgba[i][ACOMP] );
         }
      }
   }
   else {
      /* draw all pixels */
      for (i=0;i<n;i++) {
         ptr[i] = PACK_8A8R8G8B( rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP], rgba[i][ACOMP] );
      }
   }
}


/*
 * Write a span of PF_8A8R8G8B-format pixels to an ximage (no alpha).
 */
static void put_row_rgb_8A8R8G8B_ximage( RGB_SPAN_ARGS )
{
   const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) values;
   GET_XRB(xrb);
   register GLuint i;
   register GLuint *ptr = PIXEL_ADDR4(xrb, x, y);
   if (mask) {
      for (i=0;i<n;i++) {
         if (mask[i]) {
            ptr[i] = PACK_8A8R8G8B( rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP], 255 );
         }
      }
   }
   else {
      /* draw all pixels */
      for (i=0;i<n;i++) {
         ptr[i] = PACK_8A8R8G8B( rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP], 255 );
      }
   }
}


/*
 * Write a span of PF_8R8G8B-format pixels to an ximage.
 */
static void put_row_8R8G8B_ximage( PUT_ROW_ARGS )
{
   const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;
   GET_XRB(xrb);
   register GLuint i;
   register GLuint *ptr = PIXEL_ADDR4(xrb, x, y);
   if (mask) {
      for (i=0;i<n;i++) {
         if (mask[i]) {
            ptr[i] = PACK_8R8G8B(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]);
         }
      }
   }
   else {
      for (i=0;i<n;i++) {
         ptr[i] = PACK_8R8G8B(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]);
      }
   }
}


/*
 * Write a span of PF_8R8G8B24-format pixels to an ximage.
 */
static void put_row_8R8G8B24_ximage( PUT_ROW_ARGS )
{
   const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;
   GET_XRB(xrb);
   register GLuint i;
   register GLubyte *ptr = (GLubyte *) PIXEL_ADDR3(xrb, x, y );
   if (mask) {
      for (i=0;i<n;i++) {
         if (mask[i]) {
            GLuint *ptr4 = (GLuint *) ptr;
            register GLuint pixel = *ptr4;
            switch (3 & (int)(ptr - (GLubyte*)ptr4)) {
               case 0:
                  pixel &= 0xff000000;
                  pixel |= rgba[i][BCOMP];
                  pixel |= rgba[i][GCOMP] << 8;
                  pixel |= rgba[i][RCOMP] << 16;
                  *ptr4 = pixel;
                  break;
               case 3:
                  pixel &= 0x00ffffff;
                  pixel |= rgba[i][BCOMP] << 24;
                  *ptr4++ = pixel;
                  pixel = *ptr4 & 0xffff0000;
                  pixel |= rgba[i][GCOMP];
                  pixel |= rgba[i][RCOMP] << 8;
                  *ptr4 = pixel;
                  break;
               case 2:
                  pixel &= 0x0000ffff;
                  pixel |= rgba[i][BCOMP] << 16;
                  pixel |= rgba[i][GCOMP] << 24;
                  *ptr4++ = pixel;
                  pixel = *ptr4 & 0xffffff00;
                  pixel |= rgba[i][RCOMP];
                  *ptr4 = pixel;
                  break;
               case 1:
                  pixel &= 0x000000ff;
                  pixel |= rgba[i][BCOMP] << 8;
                  pixel |= rgba[i][GCOMP] << 16;
                  pixel |= rgba[i][RCOMP] << 24;
                  *ptr4 = pixel;
                  break;
            }
         }
	 ptr += 3;
      }
   }
   else {
      /* write all pixels */
      int w = n;
      GLuint *ptr4 = (GLuint *) ptr;
      register GLuint pixel = *ptr4;
      int index = (int)(ptr - (GLubyte *)ptr4);
      register GLuint i = 0;
      switch (index) {
         case 0:
            break;
         case 1:
            pixel &= 0x00ffffff;
            pixel |= rgba[i][BCOMP] << 24;
            *ptr4++ = pixel;
            pixel = *ptr4 & 0xffff0000;
            pixel |= rgba[i][GCOMP];
            pixel |= rgba[i++][RCOMP] << 8;
            *ptr4 = pixel;
            if (0 == --w)
               break;
         case 2:
            pixel &= 0x0000ffff;
            pixel |= rgba[i][BCOMP] << 16;
            pixel |= rgba[i][GCOMP] << 24;
            *ptr4++ = pixel;
            pixel = *ptr4 & 0xffffff00;
            pixel |= rgba[i++][RCOMP];
            *ptr4 = pixel;
            if (0 == --w)
               break;
         case 3:
            pixel &= 0x000000ff;
            pixel |= rgba[i][BCOMP] << 8;
            pixel |= rgba[i][GCOMP] << 16;
            pixel |= rgba[i++][RCOMP] << 24;
            *ptr4++ = pixel;
            if (0 == --w)
               break;
            break;
      }
      while (w > 3) {
         pixel = rgba[i][BCOMP];
         pixel |= rgba[i][GCOMP] << 8;
         pixel |= rgba[i++][RCOMP] << 16;
         pixel |= rgba[i][BCOMP] << 24;
         *ptr4++ = pixel;
         pixel = rgba[i][GCOMP];
         pixel |= rgba[i++][RCOMP] << 8;
         pixel |= rgba[i][BCOMP] << 16;
         pixel |= rgba[i][GCOMP] << 24;
         *ptr4++ = pixel;
         pixel = rgba[i++][RCOMP];
         pixel |= rgba[i][BCOMP] << 8;
         pixel |= rgba[i][GCOMP] << 16;
         pixel |= rgba[i++][RCOMP] << 24;
         *ptr4++ = pixel;
         w -= 4;
      }
      switch (w) {
         case 0:
            break;
         case 1:
            pixel = *ptr4 & 0xff000000;
            pixel |= rgba[i][BCOMP];
            pixel |= rgba[i][GCOMP] << 8;
            pixel |= rgba[i][RCOMP] << 16;
            *ptr4 = pixel;
            break;
         case 2:
            pixel = rgba[i][BCOMP];
            pixel |= rgba[i][GCOMP] << 8;
            pixel |= rgba[i++][RCOMP] << 16;
            pixel |= rgba[i][BCOMP] << 24;
            *ptr4++ = pixel;
            pixel = *ptr4 & 0xffff0000;
            pixel |= rgba[i][GCOMP];
            pixel |= rgba[i][RCOMP] << 8;
            *ptr4 = pixel;
            break;
         case 3:
            pixel = rgba[i][BCOMP];
            pixel |= rgba[i][GCOMP] << 8;
            pixel |= rgba[i++][RCOMP] << 16;
            pixel |= rgba[i][BCOMP] << 24;
            *ptr4++ = pixel;
            pixel = rgba[i][GCOMP];
            pixel |= rgba[i++][RCOMP] << 8;
            pixel |= rgba[i][BCOMP] << 16;
            pixel |= rgba[i][GCOMP] << 24;
            *ptr4++ = pixel;
            pixel = *ptr4 & 0xffffff00;
            pixel |= rgba[i][RCOMP];
            *ptr4 = pixel;
            break;
      }
   }
}


/*
 * Write a span of PF_8R8G8B-format pixels to an ximage (no alpha).
 */
static void put_row_rgb_8R8G8B_ximage( RGB_SPAN_ARGS )
{
   const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) values;
   GET_XRB(xrb);
   register GLuint i;
   register GLuint *ptr = PIXEL_ADDR4(xrb, x, y);
   if (mask) {
      for (i=0;i<n;i++) {
         if (mask[i]) {
            ptr[i] = PACK_8R8G8B(rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]);
         }
      }
   }
   else {
      /* draw all pixels */
      for (i=0;i<n;i++) {
         ptr[i] = PACK_8R8G8B(rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]);
      }
   }
}


/*
 * Write a span of PF_8R8G8B24-format pixels to an ximage (no alpha).
 */
static void put_row_rgb_8R8G8B24_ximage( RGB_SPAN_ARGS )
{
   const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) values;
   GET_XRB(xrb);
   register GLuint i;
   register GLubyte *ptr = (GLubyte *) PIXEL_ADDR3(xrb, x, y);
   if (mask) {
      for (i=0;i<n;i++) {
         if (mask[i]) {
            *ptr++ = rgb[i][BCOMP];
            *ptr++ = rgb[i][GCOMP];
            *ptr++ = rgb[i][RCOMP];
         }
         else {
            ptr += 3;
         }
      }
   }
   else {
      /* draw all pixels */
      for (i=0;i<n;i++) {
         *ptr++ = rgb[i][BCOMP];
         *ptr++ = rgb[i][GCOMP];
         *ptr++ = rgb[i][RCOMP];
      }
   }
}


/*
 * Write a span of PF_5R6G5B-format pixels to an ximage.
 */
static void put_row_5R6G5B_ximage( PUT_ROW_ARGS )
{
   const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;
   GET_XRB(xrb);
   register GLuint i;
   register GLushort *ptr = PIXEL_ADDR2(xrb, x, y);
   if (mask) {
      for (i=0;i<n;i++) {
         if (mask[i]) {
            ptr[i] = PACK_5R6G5B( rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP] );
         }
      }
   }
   else {
      /* draw all pixels */
#if defined(__i386__) /* word stores don't have to be on 4-byte boundaries */
      GLuint *ptr32 = (GLuint *) ptr;
      GLuint extraPixel = (n & 1);
      n -= extraPixel;
      for (i = 0; i < n; i += 2) {
         GLuint p0, p1;
         p0 = PACK_5R6G5B(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]);
         p1 = PACK_5R6G5B(rgba[i+1][RCOMP], rgba[i+1][GCOMP], rgba[i+1][BCOMP]);
         *ptr32++ = (p1 << 16) | p0;
      }
      if (extraPixel) {
         ptr[n] = PACK_5R6G5B(rgba[n][RCOMP], rgba[n][GCOMP], rgba[n][BCOMP]);
      }
#else
      for (i = 0; i < n; i++) {
         ptr[i] = PACK_5R6G5B(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]);
      }
#endif
   }
}


/*
 * Write a span of PF_DITHER_5R6G5B-format pixels to an ximage.
 */
static void put_row_DITHER_5R6G5B_ximage( PUT_ROW_ARGS )
{
   const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;
   GET_XRB(xrb);
   const XMesaContext xmesa = XMESA_CONTEXT(ctx);
   register GLuint i;
   register GLushort *ptr = PIXEL_ADDR2(xrb, x, y);
   const GLint y2 = YFLIP(xrb, y);
   if (mask) {
      for (i=0;i<n;i++,x++) {
         if (mask[i]) {
            PACK_TRUEDITHER( ptr[i], x, y2, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP] );
         }
      }
   }
   else {
      /* draw all pixels */
#if defined(__i386__) /* word stores don't have to be on 4-byte boundaries */
      GLuint *ptr32 = (GLuint *) ptr;
      GLuint extraPixel = (n & 1);
      n -= extraPixel;
      for (i = 0; i < n; i += 2, x += 2) {
         GLuint p0, p1;
         PACK_TRUEDITHER( p0, x, y2, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP] );
         PACK_TRUEDITHER( p1, x+1, y2, rgba[i+1][RCOMP], rgba[i+1][GCOMP], rgba[i+1][BCOMP] );
         *ptr32++ = (p1 << 16) | p0;
      }
      if (extraPixel) {
         PACK_TRUEDITHER( ptr[n], x+n, y2, rgba[n][RCOMP], rgba[n][GCOMP], rgba[n][BCOMP]);
      }
#else
      for (i = 0; i < n; i++, x++) {
         PACK_TRUEDITHER( ptr[i], x, y2, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]);
      }
#endif
   }
}


/*
 * Write a span of PF_5R6G5B-format pixels to an ximage (no alpha).
 */
static void put_row_rgb_5R6G5B_ximage( RGB_SPAN_ARGS )
{
   const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) values;
   GET_XRB(xrb);
   register GLuint i;
   register GLushort *ptr = PIXEL_ADDR2(xrb, x, y);
   if (mask) {
      for (i=0;i<n;i++) {
         if (mask[i]) {
            ptr[i] = PACK_5R6G5B( rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP] );
         }
      }
   }
   else {
      /* draw all pixels */
#if defined(__i386__) /* word stores don't have to be on 4-byte boundaries */
      GLuint *ptr32 = (GLuint *) ptr;
      GLuint extraPixel = (n & 1);
      n -= extraPixel;
      for (i = 0; i < n; i += 2) {
         GLuint p0, p1;
         p0 = PACK_5R6G5B(rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]);
         p1 = PACK_5R6G5B(rgb[i+1][RCOMP], rgb[i+1][GCOMP], rgb[i+1][BCOMP]);
         *ptr32++ = (p1 << 16) | p0;
      }
      if (extraPixel) {
         ptr[n] = PACK_5R6G5B(rgb[n][RCOMP], rgb[n][GCOMP], rgb[n][BCOMP]);
      }
#else
      for (i=0;i<n;i++) {
         ptr[i] = PACK_5R6G5B( rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP] );
      }
#endif
   }
}


/*
 * Write a span of PF_DITHER_5R6G5B-format pixels to an ximage (no alpha).
 */
static void put_row_rgb_DITHER_5R6G5B_ximage( RGB_SPAN_ARGS )
{
   const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) values;
   GET_XRB(xrb);
   const XMesaContext xmesa = XMESA_CONTEXT(ctx);
   register GLuint i;
   register GLushort *ptr = PIXEL_ADDR2(xrb, x, y );
   if (mask) {
      for (i=0;i<n;i++,x++) {
         if (mask[i]) {
            PACK_TRUEDITHER( ptr[i], x, y, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP] );
         }
      }
   }
   else {
      /* draw all pixels */
#if defined(__i386__) /* word stores don't have to be on 4-byte boundaries */
      GLuint *ptr32 = (GLuint *) ptr;
      GLuint extraPixel = (n & 1);
      n -= extraPixel;
      for (i = 0; i < n; i += 2, x += 2) {
         GLuint p0, p1;