- Port 3.4 texture utils, texture format work to 3.5 (including new

  FetchTexel routines).
- Initial hooks for GL_EXT_texture_filter_anisotropic.

1 files changed, 566 insertions, 0 deletions

diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c
new file mode 100644
index 00000000000..d7b8024161f
--- /dev/null
+++ b/src/mesa/main/texformat.c
@@ -0,0 +1,566 @@
+/* $Id: texformat.c,v 1.2 2001/03/18 08:53:49 gareth Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.5
+ *
+ * Copyright (C) 1999-2001  Brian Paul   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, sublicense,
+ * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL 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.
+ *
+ * Author:
+ *    Gareth Hughes <[email protected]>
+ */
+
+#ifdef PC_HEADER
+#include "all.h"
+#else
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "image.h"
+#include "mem.h"
+#include "mmath.h"
+#include "mtypes.h"
+#include "texformat.h"
+#include "teximage.h"
+#include "texstate.h"
+#include "swrast/s_span.h"
+#endif
+
+
+/* Texel fetch routines for all supported formats:
+ */
+#define DIM 1
+#include "texformat_tmp.h"
+
+#define DIM 2
+#include "texformat_tmp.h"
+
+#define DIM 3
+#include "texformat_tmp.h"
+
+/* Have to have this so the FetchTexel function pointer is never NULL.
+ */
+static void fetch_null_texel( const struct gl_texture_image *texImage,
+			      GLint i, GLint j, GLint k, GLvoid *texel )
+{
+   GLchan *rgba = (GLchan *) texel;
+   rgba[RCOMP] = 0;
+   rgba[GCOMP] = 0;
+   rgba[BCOMP] = 0;
+   rgba[ACOMP] = 0;
+}
+
+
+/* ================================================================
+ * Default GLchan-based formats:
+ */
+
+const struct gl_texture_format _mesa_texformat_rgba = {
+   MESA_FORMAT_RGBA,			/* IntFormat */
+   CHAN_BITS,				/* RedBits */
+   CHAN_BITS,				/* GreenBits */
+   CHAN_BITS,				/* BlueBits */
+   CHAN_BITS,				/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   4 * CHAN_BITS / 8,			/* TexelBytes */
+   fetch_1d_texel_rgba,			/* FetchTexel1D */
+   fetch_2d_texel_rgba,			/* FetchTexel2D */
+   fetch_3d_texel_rgba,			/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_rgb = {
+   MESA_FORMAT_RGBA,			/* IntFormat */
+   CHAN_BITS,				/* RedBits */
+   CHAN_BITS,				/* GreenBits */
+   CHAN_BITS,				/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   3 * CHAN_BITS / 8,			/* TexelBytes */
+   fetch_1d_texel_rgb,			/* FetchTexel1D */
+   fetch_2d_texel_rgb,			/* FetchTexel2D */
+   fetch_3d_texel_rgb,			/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_alpha = {
+   MESA_FORMAT_ALPHA,			/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   CHAN_BITS,				/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   CHAN_BITS / 8,			/* TexelBytes */
+   fetch_1d_texel_alpha,		/* FetchTexel1D */
+   fetch_2d_texel_alpha,		/* FetchTexel2D */
+   fetch_3d_texel_alpha,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_luminance = {
+   MESA_FORMAT_LUMINANCE,		/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   0,					/* AlphaBits */
+   CHAN_BITS,				/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   CHAN_BITS / 8,			/* TexelBytes */
+   fetch_1d_texel_luminance,		/* FetchTexel1D */
+   fetch_2d_texel_luminance,		/* FetchTexel2D */
+   fetch_3d_texel_luminance,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_luminance_alpha = {
+   MESA_FORMAT_LUMINANCE_ALPHA,		/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   CHAN_BITS,				/* AlphaBits */
+   CHAN_BITS,				/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   2 * CHAN_BITS / 8,			/* TexelBytes */
+   fetch_1d_texel_luminance_alpha,	/* FetchTexel1D */
+   fetch_2d_texel_luminance_alpha,	/* FetchTexel2D */
+   fetch_3d_texel_luminance_alpha,	/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_intensity = {
+   MESA_FORMAT_INTENSITY,		/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   CHAN_BITS,				/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   CHAN_BITS / 8,			/* TexelBytes */
+   fetch_1d_texel_intensity,		/* FetchTexel1D */
+   fetch_2d_texel_intensity,		/* FetchTexel2D */
+   fetch_3d_texel_intensity,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_color_index = {
+   MESA_FORMAT_COLOR_INDEX,		/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   CHAN_BITS,				/* IndexBits */
+   0,					/* DepthBits */
+   CHAN_BITS / 8,			/* TexelBytes */
+   fetch_1d_texel_color_index,		/* FetchTexel1D */
+   fetch_2d_texel_color_index,		/* FetchTexel2D */
+   fetch_3d_texel_color_index,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_depth_component = {
+   MESA_FORMAT_DEPTH_COMPONENT,		/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   sizeof(GLfloat) * 8,			/* DepthBits */
+   sizeof(GLfloat),			/* TexelBytes */
+   fetch_1d_texel_depth_component,	/* FetchTexel1D */
+   fetch_2d_texel_depth_component,	/* FetchTexel2D */
+   fetch_3d_texel_depth_component,	/* FetchTexel3D */
+};
+
+
+/* ================================================================
+ * Hardware formats:
+ */
+
+const struct gl_texture_format _mesa_texformat_rgba8888 = {
+   MESA_FORMAT_RGBA8888,		/* IntFormat */
+   8,					/* RedBits */
+   8,					/* GreenBits */
+   8,					/* BlueBits */
+   8,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   4,					/* TexelBytes */
+   fetch_1d_texel_rgba8888,		/* FetchTexel1D */
+   fetch_2d_texel_rgba8888,		/* FetchTexel2D */
+   fetch_3d_texel_rgba8888,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_argb8888 = {
+   MESA_FORMAT_ARGB8888,		/* IntFormat */
+   8,					/* RedBits */
+   8,					/* GreenBits */
+   8,					/* BlueBits */
+   8,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   4,					/* TexelBytes */
+   fetch_1d_texel_argb8888,		/* FetchTexel1D */
+   fetch_2d_texel_argb8888,		/* FetchTexel2D */
+   fetch_3d_texel_argb8888,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_rgb888 = {
+   MESA_FORMAT_RGB888,			/* IntFormat */
+   8,					/* RedBits */
+   8,					/* GreenBits */
+   8,					/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   3,					/* TexelBytes */
+   fetch_1d_texel_rgb888,		/* FetchTexel1D */
+   fetch_2d_texel_rgb888,		/* FetchTexel2D */
+   fetch_3d_texel_rgb888,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_rgb565 = {
+   MESA_FORMAT_RGB565,			/* IntFormat */
+   5,					/* RedBits */
+   6,					/* GreenBits */
+   5,					/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   2,					/* TexelBytes */
+   fetch_1d_texel_rgb565,		/* FetchTexel1D */
+   fetch_2d_texel_rgb565,		/* FetchTexel2D */
+   fetch_3d_texel_rgb565,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_argb4444 = {
+   MESA_FORMAT_ARGB4444,		/* IntFormat */
+   4,					/* RedBits */
+   4,					/* GreenBits */
+   4,					/* BlueBits */
+   4,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   2,					/* TexelBytes */
+   fetch_1d_texel_argb4444,		/* FetchTexel1D */
+   fetch_2d_texel_argb4444,		/* FetchTexel2D */
+   fetch_3d_texel_argb4444,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_argb1555 = {
+   MESA_FORMAT_ARGB1555,		/* IntFormat */
+   5,					/* RedBits */
+   5,					/* GreenBits */
+   5,					/* BlueBits */
+   1,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   2,					/* TexelBytes */
+   fetch_1d_texel_argb1555,		/* FetchTexel1D */
+   fetch_2d_texel_argb1555,		/* FetchTexel2D */
+   fetch_3d_texel_argb1555,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_al88 = {
+   MESA_FORMAT_AL88,			/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   8,					/* AlphaBits */
+   8,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   2,					/* TexelBytes */
+   fetch_1d_texel_al88,			/* FetchTexel1D */
+   fetch_2d_texel_al88,			/* FetchTexel2D */
+   fetch_3d_texel_al88,			/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_rgb332 = {
+   MESA_FORMAT_RGB332,			/* IntFormat */
+   3,					/* RedBits */
+   3,					/* GreenBits */
+   2,					/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   1,					/* TexelBytes */
+   fetch_1d_texel_rgb332,		/* FetchTexel1D */
+   fetch_2d_texel_rgb332,		/* FetchTexel2D */
+   fetch_3d_texel_rgb332,		/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_a8 = {
+   MESA_FORMAT_A8,			/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   8,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   1,					/* TexelBytes */
+   fetch_1d_texel_a8,			/* FetchTexel1D */
+   fetch_2d_texel_a8,			/* FetchTexel2D */
+   fetch_3d_texel_a8,			/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_l8 = {
+   MESA_FORMAT_L8,			/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   0,					/* AlphaBits */
+   8,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   1,					/* TexelBytes */
+   fetch_1d_texel_l8,			/* FetchTexel1D */
+   fetch_2d_texel_l8,			/* FetchTexel2D */
+   fetch_3d_texel_l8,			/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_i8 = {
+   MESA_FORMAT_I8,			/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   8,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   1,					/* TexelBytes */
+   fetch_1d_texel_i8,			/* FetchTexel1D */
+   fetch_2d_texel_i8,			/* FetchTexel2D */
+   fetch_3d_texel_i8,			/* FetchTexel3D */
+};
+
+const struct gl_texture_format _mesa_texformat_ci8 = {
+   MESA_FORMAT_CI8,			/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   8,					/* IndexBits */
+   0,					/* DepthBits */
+   1,					/* TexelBytes */
+   fetch_1d_texel_ci8,			/* FetchTexel1D */
+   fetch_2d_texel_ci8,			/* FetchTexel2D */
+   fetch_3d_texel_ci8,			/* FetchTexel3D */
+};
+
+
+/* ================================================================
+ * Null format:
+ */
+
+const struct gl_texture_format _mesa_null_texformat = {
+   -1,					/* IntFormat */
+   0,					/* RedBits */
+   0,					/* GreenBits */
+   0,					/* BlueBits */
+   0,					/* AlphaBits */
+   0,					/* LuminanceBits */
+   0,					/* IntensityBits */
+   0,					/* IndexBits */
+   0,					/* DepthBits */
+   0,					/* TexelBytes */
+   fetch_null_texel,			/* FetchTexel1D */
+   fetch_null_texel,			/* FetchTexel2D */
+   fetch_null_texel,			/* FetchTexel3D */
+};
+
+
+
+/*
+ * Given an internal texture format enum or 1, 2, 3, 4 return the
+ * corresponding _base_ internal format:  GL_ALPHA, GL_LUMINANCE,
+ * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA.
+ * Return -1 if invalid enum.
+ */
+void _mesa_init_tex_format( GLcontext *ctx, GLenum internalFormat,
+			    struct gl_texture_image *texImage )
+{
+   texImage->IntFormat = internalFormat;
+
+   /* Ask the driver for the base format, if it doesn't know, it will
+    * return -1;
+    */
+   if ( ctx->Driver.BaseCompressedTexFormat ) {
+      GLint format = 0;			/* Silence compiler warning */
+      format = (*ctx->Driver.BaseCompressedTexFormat)( ctx, format );
+      if ( format >= 0 ) {
+	 internalFormat = format;
+      }
+   }
+
+   switch ( internalFormat ) {
+      /* GH: Bias towards GL_RGB, GL_RGBA texture formats.  This has
+       * got to be better than sticking them way down the end of this
+       * huge list.
+       */
+   case 4:				/* Quake3 uses this... */
+   case GL_RGBA:
+      texImage->Format = GL_RGBA;
+      texImage->Type = CHAN_TYPE;
+      texImage->TexFormat = &_mesa_texformat_rgba;
+      break;
+
+   case 3:				/* ... and this. */
+   case GL_RGB:
+      texImage->Format = GL_RGB;
+      texImage->Type = CHAN_TYPE;
+      texImage->TexFormat = &_mesa_texformat_rgb;
+      break;
+
+      /* GH: Okay, keep checking as normal.  Still test for GL_RGB,
+       * GL_RGBA formats first.
+       */
+   case GL_RGBA2:
+   case GL_RGBA4:
+   case GL_RGB5_A1:
+   case GL_RGBA8:
+   case GL_RGB10_A2:
+   case GL_RGBA12:
+   case GL_RGBA16:
+      texImage->Format = GL_RGBA;
+      texImage->Type = CHAN_TYPE;
+      texImage->TexFormat = &_mesa_texformat_rgba;
+      break;
+
+   case GL_R3_G3_B2:
+   case GL_RGB4:
+   case GL_RGB5:
+   case GL_RGB8:
+   case GL_RGB10:
+   case GL_RGB12:
+   case GL_RGB16:
+      texImage->Format = GL_RGB;
+      texImage->Type = CHAN_TYPE;
+      texImage->TexFormat = &_mesa_texformat_rgb;
+      break;
+
+   case GL_ALPHA:
+   case GL_ALPHA4:
+   case GL_ALPHA8:
+   case GL_ALPHA12:
+   case GL_ALPHA16:
+      texImage->Format = GL_ALPHA;
+      texImage->Type = CHAN_TYPE;
+      texImage->TexFormat = &_mesa_texformat_alpha;
+      break;
+
+   case 1:
+   case GL_LUMINANCE:
+   case GL_LUMINANCE4:
+   case GL_LUMINANCE8:
+   case GL_LUMINANCE12:
+   case GL_LUMINANCE16:
+      texImage->Format = GL_LUMINANCE;
+      texImage->Type = CHAN_TYPE;
+      texImage->TexFormat = &_mesa_texformat_luminance;
+      break;
+
+   case 2:
+   case GL_LUMINANCE_ALPHA:
+   case GL_LUMINANCE4_ALPHA4:
+   case GL_LUMINANCE6_ALPHA2:
+   case GL_LUMINANCE8_ALPHA8:
+   case GL_LUMINANCE12_ALPHA4:
+   case GL_LUMINANCE12_ALPHA12:
+   case GL_LUMINANCE16_ALPHA16:
+      texImage->Format = GL_LUMINANCE_ALPHA;
+      texImage->Type = CHAN_TYPE;
+      texImage->TexFormat = &_mesa_texformat_luminance_alpha;
+      break;
+
+   case GL_INTENSITY:
+   case GL_INTENSITY4:
+   case GL_INTENSITY8:
+   case GL_INTENSITY12:
+   case GL_INTENSITY16:
+      texImage->Format = GL_INTENSITY;
+      texImage->Type = CHAN_TYPE;
+      texImage->TexFormat = &_mesa_texformat_intensity;
+      break;
+
+   case GL_COLOR_INDEX:
+   case GL_COLOR_INDEX1_EXT:
+   case GL_COLOR_INDEX2_EXT:
+   case GL_COLOR_INDEX4_EXT:
+   case GL_COLOR_INDEX8_EXT:
+   case GL_COLOR_INDEX12_EXT:
+   case GL_COLOR_INDEX16_EXT:
+      texImage->Format = GL_COLOR_INDEX;
+      texImage->Type = CHAN_TYPE;
+      texImage->TexFormat = &_mesa_texformat_color_index;
+      break;
+
+   case GL_DEPTH_COMPONENT:
+   case GL_DEPTH_COMPONENT16_SGIX:
+   case GL_DEPTH_COMPONENT24_SGIX:
+   case GL_DEPTH_COMPONENT32_SGIX:
+      if ( ctx->Extensions.SGIX_depth_texture ) {
+	 texImage->Format = GL_DEPTH_COMPONENT;
+	 texImage->Type = GL_FLOAT;	/* XXX or GL_UNSIGNED_INT? */
+	 texImage->TexFormat = &_mesa_texformat_depth_component;
+      } else {
+	 /* This error should have already been caught and dealt with.
+	  */
+	 _mesa_problem( ctx, "depth format without GL_SGIX_depth_texture" );
+      }
+      break;
+
+   default:
+      _mesa_problem( ctx, "unexpected format in _mesa_init_tex_format" );
+      return;
+   }
+}