svn merge ^/branches/released .

1 files changed, 392 insertions, 0 deletions

diff --git a/mesalib/src/gallium/auxiliary/util/u_format.c b/mesalib/src/gallium/auxiliary/util/u_format.c
new file mode 100644
index 000000000..91485b05c
--- /dev/null
+++ b/mesalib/src/gallium/auxiliary/util/u_format.c
@@ -0,0 +1,392 @@
+/**************************************************************************

+ *

+ * Copyright 2010 VMware, Inc.

+ * All Rights Reserved.

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the

+ * "Software"), to deal in the Software without restriction, including

+ * without limitation the rights to use, copy, modify, merge, publish,

+ * distribute, sub license, and/or sell copies of the Software, and to

+ * permit persons to whom the Software is furnished to do so, subject to

+ * the following conditions:

+ *

+ * The above copyright notice and this permission notice (including the

+ * next paragraph) shall be included in all copies or substantial portions

+ * of the Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.

+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR

+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ *

+ **************************************************************************/

+

+/**

+ * @file

+ * Pixel format accessor functions.

+ *

+ * @author Jose Fonseca <jfonseca@vmware.com>

+ */

+

+#include "u_math.h"

+#include "u_memory.h"

+#include "u_rect.h"

+#include "u_format.h"

+#include "u_format_s3tc.h"

+

+#include "pipe/p_defines.h"

+

+

+boolean

+util_format_is_float(enum pipe_format format)

+{

+   const struct util_format_description *desc = util_format_description(format);

+   unsigned i;

+

+   assert(desc);

+   if (!desc) {

+      return FALSE;

+   }

+

+   /* Find the first non-void channel. */

+   for (i = 0; i < 4; i++) {

+      if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {

+         break;

+      }

+   }

+

+   if (i == 4) {

+      return FALSE;

+   }

+

+   return desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT ? TRUE : FALSE;

+}

+

+

+boolean

+util_format_is_supported(enum pipe_format format, unsigned bind)

+{

+   if (util_format_is_s3tc(format) && !util_format_s3tc_enabled) {

+      return FALSE;

+   }

+

+#ifndef TEXTURE_FLOAT_ENABLED

+   if ((bind & PIPE_BIND_RENDER_TARGET) &&

+       format != PIPE_FORMAT_R9G9B9E5_FLOAT &&

+       format != PIPE_FORMAT_R11G11B10_FLOAT &&

+       util_format_is_float(format)) {

+      return FALSE;

+   }

+#endif

+

+   return TRUE;

+}

+

+

+void

+util_format_read_4f(enum pipe_format format,

+                    float *dst, unsigned dst_stride,

+                    const void *src, unsigned src_stride,

+                    unsigned x, unsigned y, unsigned w, unsigned h)

+{

+   const struct util_format_description *format_desc;

+   const uint8_t *src_row;

+   float *dst_row;

+

+   format_desc = util_format_description(format);

+

+   assert(x % format_desc->block.width == 0);

+   assert(y % format_desc->block.height == 0);

+

+   src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8);

+   dst_row = dst;

+

+   format_desc->unpack_rgba_float(dst_row, dst_stride, src_row, src_stride, w, h);

+}

+

+

+void

+util_format_write_4f(enum pipe_format format,

+                     const float *src, unsigned src_stride,

+                     void *dst, unsigned dst_stride,

+                     unsigned x, unsigned y, unsigned w, unsigned h)

+{

+   const struct util_format_description *format_desc;

+   uint8_t *dst_row;

+   const float *src_row;

+

+   format_desc = util_format_description(format);

+

+   assert(x % format_desc->block.width == 0);

+   assert(y % format_desc->block.height == 0);

+

+   dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);

+   src_row = src;

+

+   format_desc->pack_rgba_float(dst_row, dst_stride, src_row, src_stride, w, h);

+}

+

+

+void

+util_format_read_4ub(enum pipe_format format, uint8_t *dst, unsigned dst_stride, const void *src, unsigned src_stride, unsigned x, unsigned y, unsigned w, unsigned h)

+{

+   const struct util_format_description *format_desc;

+   const uint8_t *src_row;

+   uint8_t *dst_row;

+

+   format_desc = util_format_description(format);

+

+   assert(x % format_desc->block.width == 0);

+   assert(y % format_desc->block.height == 0);

+

+   src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8);

+   dst_row = dst;

+

+   format_desc->unpack_rgba_8unorm(dst_row, dst_stride, src_row, src_stride, w, h);

+}

+

+

+void

+util_format_write_4ub(enum pipe_format format, const uint8_t *src, unsigned src_stride, void *dst, unsigned dst_stride, unsigned x, unsigned y, unsigned w, unsigned h)

+{

+   const struct util_format_description *format_desc;

+   uint8_t *dst_row;

+   const uint8_t *src_row;

+

+   format_desc = util_format_description(format);

+

+   assert(x % format_desc->block.width == 0);

+   assert(y % format_desc->block.height == 0);

+

+   dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8);

+   src_row = src;

+

+   format_desc->pack_rgba_8unorm(dst_row, dst_stride, src_row, src_stride, w, h);

+}

+

+

+boolean

+util_is_format_compatible(const struct util_format_description *src_desc,

+                          const struct util_format_description *dst_desc)

+{

+   unsigned chan;

+

+   if (src_desc->format == dst_desc->format) {

+      return TRUE;

+   }

+

+   if (src_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN ||

+       dst_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN) {

+      return FALSE;

+   }

+

+   if (src_desc->block.bits != dst_desc->block.bits ||

+       src_desc->nr_channels != dst_desc->nr_channels ||

+       src_desc->colorspace != dst_desc->colorspace) {

+      return FALSE;

+   }

+

+   for (chan = 0; chan < 4; ++chan) {

+      if (src_desc->channel[chan].size !=

+          dst_desc->channel[chan].size) {

+         return FALSE;

+      }

+   }

+

+   for (chan = 0; chan < 4; ++chan) {

+      enum util_format_swizzle swizzle = dst_desc->swizzle[chan];

+

+      if (swizzle < 4) {

+         if (src_desc->swizzle[chan] != swizzle) {

+            return FALSE;

+         }

+         if ((src_desc->channel[swizzle].type !=

+              dst_desc->channel[swizzle].type) ||

+             (src_desc->channel[swizzle].normalized !=

+              dst_desc->channel[swizzle].normalized)) {

+            return FALSE;

+         }

+      }

+   }

+

+   return TRUE;

+}

+

+

+boolean

+util_format_fits_8unorm(const struct util_format_description *format_desc)

+{

+   unsigned chan;

+

+   /*

+    * After linearized sRGB values require more than 8bits.

+    */

+

+   if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {

+      return FALSE;

+   }

+

+   switch (format_desc->layout) {

+

+   case UTIL_FORMAT_LAYOUT_S3TC:

+   case UTIL_FORMAT_LAYOUT_RGTC:

+      /*

+       * These are straight forward.

+       */

+

+      return TRUE;

+

+   case UTIL_FORMAT_LAYOUT_PLAIN:

+      /*

+       * For these we can find a generic rule.

+       */

+

+      for (chan = 0; chan < format_desc->nr_channels; ++chan) {

+         switch (format_desc->channel[chan].type) {

+         case UTIL_FORMAT_TYPE_VOID:

+            break;

+         case UTIL_FORMAT_TYPE_UNSIGNED:

+            if (!format_desc->channel[chan].normalized ||

+                format_desc->channel[chan].size > 8) {

+               return FALSE;

+            }

+            break;

+         default:

+            return FALSE;

+         }

+      }

+      return TRUE;

+

+   default:

+      /*

+       * Handle all others on a case by case basis.

+       */

+

+      switch (format_desc->format) {

+      case PIPE_FORMAT_R1_UNORM:

+      case PIPE_FORMAT_UYVY:

+      case PIPE_FORMAT_YUYV:

+      case PIPE_FORMAT_R8G8_B8G8_UNORM:

+      case PIPE_FORMAT_G8R8_G8B8_UNORM:

+         return TRUE;

+

+      default:

+         return FALSE;

+      }

+   }

+}

+

+

+void

+util_format_translate(enum pipe_format dst_format,

+                      void *dst, unsigned dst_stride,

+                      unsigned dst_x, unsigned dst_y,

+                      enum pipe_format src_format,

+                      const void *src, unsigned src_stride,

+                      unsigned src_x, unsigned src_y,

+                      unsigned width, unsigned height)

+{

+   const struct util_format_description *dst_format_desc;

+   const struct util_format_description *src_format_desc;

+   uint8_t *dst_row;

+   const uint8_t *src_row;

+   unsigned x_step, y_step;

+   unsigned dst_step;

+   unsigned src_step;

+

+   dst_format_desc = util_format_description(dst_format);

+   src_format_desc = util_format_description(src_format);

+

+   if (util_is_format_compatible(src_format_desc, dst_format_desc)) {

+      /*

+       * Trivial case.

+       */

+

+      util_copy_rect(dst, dst_format, dst_stride,  dst_x, dst_y,

+                     width, height, src, (int)src_stride,

+                     src_x, src_y);

+      return;

+   }

+

+   assert(dst_x % dst_format_desc->block.width == 0);

+   assert(dst_y % dst_format_desc->block.height == 0);

+   assert(src_x % src_format_desc->block.width == 0);

+   assert(src_y % src_format_desc->block.height == 0);

+

+   dst_row = (uint8_t *)dst + dst_y*dst_stride + dst_x*(dst_format_desc->block.bits/8);

+   src_row = (const uint8_t *)src + src_y*src_stride + src_x*(src_format_desc->block.bits/8);

+

+   /*

+    * This works because all pixel formats have pixel blocks with power of two

+    * sizes.

+    */

+

+   y_step = MAX2(dst_format_desc->block.height, src_format_desc->block.height);

+   x_step = MAX2(dst_format_desc->block.width, src_format_desc->block.width);

+   assert(y_step % dst_format_desc->block.height == 0);

+   assert(y_step % src_format_desc->block.height == 0);

+

+   dst_step = y_step / dst_format_desc->block.height * dst_stride;

+   src_step = y_step / src_format_desc->block.height * src_stride;

+

+   /*

+    * TODO: double formats will loose precision

+    * TODO: Add a special case for formats that are mere swizzles of each other

+    */

+

+   if (util_format_fits_8unorm(src_format_desc) ||

+       util_format_fits_8unorm(dst_format_desc)) {

+      unsigned tmp_stride;

+      uint8_t *tmp_row;

+

+      tmp_stride = MAX2(width, x_step) * 4 * sizeof *tmp_row;

+      tmp_row = MALLOC(y_step * tmp_stride);

+      if (!tmp_row)

+         return;

+

+      while (height >= y_step) {

+         src_format_desc->unpack_rgba_8unorm(tmp_row, tmp_stride, src_row, src_stride, width, y_step);

+         dst_format_desc->pack_rgba_8unorm(dst_row, dst_stride, tmp_row, tmp_stride, width, y_step);

+

+         dst_row += dst_step;

+         src_row += src_step;

+         height -= y_step;

+      }

+

+      if (height) {

+         src_format_desc->unpack_rgba_8unorm(tmp_row, tmp_stride, src_row, src_stride, width, height);

+         dst_format_desc->pack_rgba_8unorm(dst_row, dst_stride, tmp_row, tmp_stride, width, height);

+      }

+

+      FREE(tmp_row);

+   }

+   else {

+      unsigned tmp_stride;

+      float *tmp_row;

+

+      tmp_stride = MAX2(width, x_step) * 4 * sizeof *tmp_row;

+      tmp_row = MALLOC(y_step * tmp_stride);

+      if (!tmp_row)

+         return;

+

+      while (height >= y_step) {

+         src_format_desc->unpack_rgba_float(tmp_row, tmp_stride, src_row, src_stride, width, y_step);

+         dst_format_desc->pack_rgba_float(dst_row, dst_stride, tmp_row, tmp_stride, width, y_step);

+

+         dst_row += dst_step;

+         src_row += src_step;

+         height -= y_step;

+      }

+

+      if (height) {

+         src_format_desc->unpack_rgba_float(tmp_row, tmp_stride, src_row, src_stride, width, height);

+         dst_format_desc->pack_rgba_float(dst_row, dst_stride, tmp_row, tmp_stride, width, height);

+      }

+

+      FREE(tmp_row);

+   }

+}