libX11 libxtrans mesa git update 20 sep 2011

1 files changed, 216 insertions, 205 deletions

diff --git a/mesalib/src/mesa/main/texpal.c b/mesalib/src/mesa/main/texpal.c
index 801914462..ed2261b01 100644
--- a/mesalib/src/mesa/main/texpal.c
+++ b/mesalib/src/mesa/main/texpal.c
@@ -1,205 +1,216 @@
-/**************************************************************************

- *

- * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.

- * All Rights Reserved.

- *

- **************************************************************************/

-

-

-/**

- * Code to convert compressed/paletted texture images to ordinary images.

- * See the GL_OES_compressed_paletted_texture spec at

- * http://khronos.org/registry/gles/extensions/OES/OES_compressed_paletted_texture.txt

- *

- * XXX this makes it impossible to add hardware support...

- */

-

-

-#include "glheader.h"

-#include "compiler.h" /* for ASSERT */

-#include "context.h"

-#include "mfeatures.h"

-#include "mtypes.h"

-#include "imports.h"

-#include "pixelstore.h"

-#include "teximage.h"

-#include "texpal.h"

-

-#if FEATURE_ES

-

-

-static const struct cpal_format_info {

-   GLenum cpal_format;

-   GLenum format;

-   GLenum type;

-   GLuint palette_size;

-   GLuint size;

-} formats[] = {

-   { GL_PALETTE4_RGB8_OES,     GL_RGB,  GL_UNSIGNED_BYTE,           16, 3 },

-   { GL_PALETTE4_RGBA8_OES,    GL_RGBA, GL_UNSIGNED_BYTE,           16, 4 },

-   { GL_PALETTE4_R5_G6_B5_OES, GL_RGB,  GL_UNSIGNED_SHORT_5_6_5,    16, 2 },

-   { GL_PALETTE4_RGBA4_OES,    GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4,  16, 2 },

-   { GL_PALETTE4_RGB5_A1_OES,  GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1,  16, 2 },

-   { GL_PALETTE8_RGB8_OES,     GL_RGB,  GL_UNSIGNED_BYTE,          256, 3 },

-   { GL_PALETTE8_RGBA8_OES,    GL_RGBA, GL_UNSIGNED_BYTE,          256, 4 },

-   { GL_PALETTE8_R5_G6_B5_OES, GL_RGB,  GL_UNSIGNED_SHORT_5_6_5,   256, 2 },

-   { GL_PALETTE8_RGBA4_OES,    GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, 256, 2 },

-   { GL_PALETTE8_RGB5_A1_OES,  GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, 256, 2 }

-};

-

-

-/**

- * Get a color/entry from the palette.

- */

-static GLuint

-get_palette_entry(const struct cpal_format_info *info, const GLubyte *palette,

-                  GLuint index, GLubyte *pixel)

-{

-   memcpy(pixel, palette + info->size * index, info->size);

-   return info->size;

-}

-

-

-/**

- * Convert paletted texture to color texture.

- */

-static void

-paletted_to_color(const struct cpal_format_info *info, const GLubyte *palette,

-                  const void *indices, GLuint num_pixels, GLubyte *image)

-{

-   GLubyte *pix = image;

-   GLuint remain, i;

-

-   if (info->palette_size == 16) {

-      /* 4 bits per index */

-      const GLubyte *ind = (const GLubyte *) indices;

-

-      /* two pixels per iteration */

-      remain = num_pixels % 2;

-      for (i = 0; i < num_pixels / 2; i++) {

-         pix += get_palette_entry(info, palette, (ind[i] >> 4) & 0xf, pix);

-         pix += get_palette_entry(info, palette, ind[i] & 0xf, pix);

-      }

-      if (remain) {

-         get_palette_entry(info, palette, (ind[i] >> 4) & 0xf, pix);

-      }

-   }

-   else {

-      /* 8 bits per index */

-      const GLubyte *ind = (const GLubyte *) indices;

-      for (i = 0; i < num_pixels; i++)

-         pix += get_palette_entry(info, palette, ind[i], pix);

-   }

-}

-

-

-static const struct cpal_format_info *

-cpal_get_info(GLint level, GLenum internalFormat,

-              GLsizei width, GLsizei height, GLsizei imageSize)

-{

-   const struct cpal_format_info *info;

-   GLint lvl, num_levels;

-   GLsizei w, h, expect_size;

-

-   info = &formats[internalFormat - GL_PALETTE4_RGB8_OES];

-   ASSERT(info->cpal_format == internalFormat);

-

-   if (level > 0) {

-      _mesa_error(_mesa_get_current_context(), GL_INVALID_VALUE,

-            "glCompressedTexImage2D(level=%d)", level);

-      return NULL;

-   }

-

-   num_levels = -level + 1;

-   expect_size = info->palette_size * info->size;

-   for (lvl = 0; lvl < num_levels; lvl++) {

-      w = width >> lvl;

-      if (!w)

-         w = 1;

-      h = height >> lvl;

-      if (!h)

-         h = 1;

-

-      if (info->palette_size == 16)

-         expect_size += (w * h  + 1) / 2;

-      else

-         expect_size += w * h;

-   }

-   if (expect_size > imageSize) {

-      _mesa_error(_mesa_get_current_context(), GL_INVALID_VALUE,

-            "glCompressedTexImage2D(imageSize=%d)", imageSize);

-      return NULL;

-   }

-   return info;

-}

-

-/**

- * Convert a call to glCompressedTexImage2D() where internalFormat is a

- *  compressed palette format into a regular GLubyte/RGBA glTexImage2D() call.

- */

-void

-_mesa_cpal_compressed_teximage2d(GLenum target, GLint level,

-				 GLenum internalFormat,

-				 GLsizei width, GLsizei height,

-				 GLsizei imageSize, const void *palette)

-{

-   const struct cpal_format_info *info;

-   GLint lvl, num_levels;

-   const GLubyte *indices;

-   GLint saved_align, align;

-   GET_CURRENT_CONTEXT(ctx);

-

-   info = cpal_get_info(level, internalFormat, width, height, imageSize);

-   if (!info)

-      return;

-

-   info = &formats[internalFormat - GL_PALETTE4_RGB8_OES];

-   ASSERT(info->cpal_format == internalFormat);

-   num_levels = -level + 1;

-

-   /* first image follows the palette */

-   indices = (const GLubyte *) palette + info->palette_size * info->size;

-

-   saved_align = ctx->Unpack.Alignment;

-   align = saved_align;

-

-   for (lvl = 0; lvl < num_levels; lvl++) {

-      GLsizei w, h;

-      GLuint num_texels;

-      GLubyte *image = NULL;

-

-      w = width >> lvl;

-      if (!w)

-         w = 1;

-      h = height >> lvl;

-      if (!h)

-         h = 1;

-      num_texels = w * h;

-      if (w * info->size % align) {

-         _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1);

-         align = 1;

-      }

-

-      /* allocate and fill dest image buffer */

-      if (palette) {

-         image = (GLubyte *) malloc(num_texels * info->size);

-         paletted_to_color(info, palette, indices, num_texels, image);

-      }

-

-      _mesa_TexImage2D(target, lvl, info->format, w, h, 0,

-                       info->format, info->type, image);

-      if (image)

-         free(image);

-

-      /* advance index pointer to point to next src mipmap */

-      if (info->palette_size == 16)

-         indices += (num_texels + 1) / 2;

-      else

-         indices += num_texels;

-   }

-

-   if (saved_align != align)

-      _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, saved_align);

-}

-

-#endif

+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ **************************************************************************/
+
+
+/**
+ * Code to convert compressed/paletted texture images to ordinary images.
+ * See the GL_OES_compressed_paletted_texture spec at
+ * http://khronos.org/registry/gles/extensions/OES/OES_compressed_paletted_texture.txt
+ *
+ * XXX this makes it impossible to add hardware support...
+ */
+
+
+#include "glheader.h"
+#include "compiler.h" /* for ASSERT */
+#include "context.h"
+#include "mfeatures.h"
+#include "mtypes.h"
+#include "imports.h"
+#include "pixelstore.h"
+#include "teximage.h"
+#include "texpal.h"
+
+#if FEATURE_ES
+
+
+static const struct cpal_format_info {
+   GLenum cpal_format;
+   GLenum format;
+   GLenum type;
+   GLuint palette_size;
+   GLuint size;
+} formats[] = {
+   { GL_PALETTE4_RGB8_OES,     GL_RGB,  GL_UNSIGNED_BYTE,           16, 3 },
+   { GL_PALETTE4_RGBA8_OES,    GL_RGBA, GL_UNSIGNED_BYTE,           16, 4 },
+   { GL_PALETTE4_R5_G6_B5_OES, GL_RGB,  GL_UNSIGNED_SHORT_5_6_5,    16, 2 },
+   { GL_PALETTE4_RGBA4_OES,    GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4,  16, 2 },
+   { GL_PALETTE4_RGB5_A1_OES,  GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1,  16, 2 },
+   { GL_PALETTE8_RGB8_OES,     GL_RGB,  GL_UNSIGNED_BYTE,          256, 3 },
+   { GL_PALETTE8_RGBA8_OES,    GL_RGBA, GL_UNSIGNED_BYTE,          256, 4 },
+   { GL_PALETTE8_R5_G6_B5_OES, GL_RGB,  GL_UNSIGNED_SHORT_5_6_5,   256, 2 },
+   { GL_PALETTE8_RGBA4_OES,    GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, 256, 2 },
+   { GL_PALETTE8_RGB5_A1_OES,  GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, 256, 2 }
+};
+
+
+/**
+ * Get a color/entry from the palette.
+ */
+static GLuint
+get_palette_entry(const struct cpal_format_info *info, const GLubyte *palette,
+                  GLuint index, GLubyte *pixel)
+{
+   memcpy(pixel, palette + info->size * index, info->size);
+   return info->size;
+}
+
+
+/**
+ * Convert paletted texture to color texture.
+ */
+static void
+paletted_to_color(const struct cpal_format_info *info, const GLubyte *palette,
+                  const void *indices, GLuint num_pixels, GLubyte *image)
+{
+   GLubyte *pix = image;
+   GLuint remain, i;
+
+   if (info->palette_size == 16) {
+      /* 4 bits per index */
+      const GLubyte *ind = (const GLubyte *) indices;
+
+      /* two pixels per iteration */
+      remain = num_pixels % 2;
+      for (i = 0; i < num_pixels / 2; i++) {
+         pix += get_palette_entry(info, palette, (ind[i] >> 4) & 0xf, pix);
+         pix += get_palette_entry(info, palette, ind[i] & 0xf, pix);
+      }
+      if (remain) {
+         get_palette_entry(info, palette, (ind[i] >> 4) & 0xf, pix);
+      }
+   }
+   else {
+      /* 8 bits per index */
+      const GLubyte *ind = (const GLubyte *) indices;
+      for (i = 0; i < num_pixels; i++)
+         pix += get_palette_entry(info, palette, ind[i], pix);
+   }
+}
+
+unsigned
+_mesa_cpal_compressed_size(int level, GLenum internalFormat,
+			   unsigned width, unsigned height)
+{
+   const struct cpal_format_info *info;
+   const int num_levels = -level + 1;
+   int lvl;
+   unsigned w, h, expect_size;
+
+   if (internalFormat < GL_PALETTE4_RGB8_OES
+       || internalFormat > GL_PALETTE8_RGB5_A1_OES) {
+      return 0;
+   }
+
+   info = &formats[internalFormat - GL_PALETTE4_RGB8_OES];
+   ASSERT(info->cpal_format == internalFormat);
+
+   expect_size = info->palette_size * info->size;
+   for (lvl = 0; lvl < num_levels; lvl++) {
+      w = width >> lvl;
+      if (!w)
+         w = 1;
+      h = height >> lvl;
+      if (!h)
+         h = 1;
+
+      if (info->palette_size == 16)
+         expect_size += (w * h  + 1) / 2;
+      else
+         expect_size += w * h;
+   }
+
+   return expect_size;
+}
+
+void
+_mesa_cpal_compressed_format_type(GLenum internalFormat, GLenum *format,
+				  GLenum *type)
+{
+   const struct cpal_format_info *info;
+
+   if (internalFormat < GL_PALETTE4_RGB8_OES
+       || internalFormat > GL_PALETTE8_RGB5_A1_OES) {
+      return;
+   }
+
+   info = &formats[internalFormat - GL_PALETTE4_RGB8_OES];
+   *format = info->format;
+   *type = info->type;
+}
+
+/**
+ * Convert a call to glCompressedTexImage2D() where internalFormat is a
+ *  compressed palette format into a regular GLubyte/RGBA glTexImage2D() call.
+ */
+void
+_mesa_cpal_compressed_teximage2d(GLenum target, GLint level,
+				 GLenum internalFormat,
+				 GLsizei width, GLsizei height,
+				 GLsizei imageSize, const void *palette)
+{
+   const struct cpal_format_info *info;
+   GLint lvl, num_levels;
+   const GLubyte *indices;
+   GLint saved_align, align;
+   GET_CURRENT_CONTEXT(ctx);
+
+   /* By this point, the internalFormat should have been validated.
+    */
+   assert(internalFormat >= GL_PALETTE4_RGB8_OES
+	  && internalFormat <= GL_PALETTE8_RGB5_A1_OES);
+
+   info = &formats[internalFormat - GL_PALETTE4_RGB8_OES];
+
+   num_levels = -level + 1;
+
+   /* first image follows the palette */
+   indices = (const GLubyte *) palette + info->palette_size * info->size;
+
+   saved_align = ctx->Unpack.Alignment;
+   align = saved_align;
+
+   for (lvl = 0; lvl < num_levels; lvl++) {
+      GLsizei w, h;
+      GLuint num_texels;
+      GLubyte *image = NULL;
+
+      w = width >> lvl;
+      if (!w)
+         w = 1;
+      h = height >> lvl;
+      if (!h)
+         h = 1;
+      num_texels = w * h;
+      if (w * info->size % align) {
+         _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 1);
+         align = 1;
+      }
+
+      /* allocate and fill dest image buffer */
+      if (palette) {
+         image = (GLubyte *) malloc(num_texels * info->size);
+         paletted_to_color(info, palette, indices, num_texels, image);
+      }
+
+      _mesa_TexImage2D(target, lvl, info->format, w, h, 0,
+                       info->format, info->type, image);
+      if (image)
+         free(image);
+
+      /* advance index pointer to point to next src mipmap */
+      if (info->palette_size == 16)
+         indices += (num_texels + 1) / 2;
+      else
+         indices += num_texels;
+   }
+
+   if (saved_align != align)
+      _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, saved_align);
+}
+
+#endif