initial check-in

1 files changed, 537 insertions, 0 deletions

diff --git a/src/mesa/main/texutil.c b/src/mesa/main/texutil.c
new file mode 100644
index 00000000000..3023113c173
--- /dev/null
+++ b/src/mesa/main/texutil.c
@@ -0,0 +1,537 @@
+/* $Id: texutil.c,v 1.1 2000/03/24 20:54:21 brianp Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.3
+ * 
+ * Copyright (C) 1999-2000  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.
+ */
+
+
+#ifdef PC_HEADER
+#include "all.h"
+#else
+#include "glheader.h"
+#include "image.h"
+#include "mem.h"
+#include "texutil.h"
+#include "types.h"
+#endif
+
+
+/*
+ * Texture utilities which may be useful to device drivers.
+ */
+
+
+
+
+/*
+ * Convert texture image data into one a specific internal format.
+ * Input:
+ *   dstFormat - the destination internal format
+ *   dstWidth, dstHeight - the destination image size
+ *   destImage - pointer to destination image buffer
+ *   srcWidth, srcHeight - size of texture image
+ *   srcFormat, srcType - format and datatype of source image
+ *   srcImage - pointer to user's texture image
+ *   packing - describes how user's texture image is packed.
+ * Return: pointer to resulting image data or NULL if error or out of memory
+ *   or NULL if we can't process the given image format/type/internalFormat
+ *   combination.
+ *
+ * Supported type conversions:
+ *   srcFormat           srcType                          dstFormat
+ *   GL_INTENSITY        GL_UNSIGNED_BYTE                 MESA_I8
+ *   GL_LUMINANCE        GL_UNSIGNED_BYTE                 MESA_L8
+ *   GL_ALPHA            GL_UNSIGNED_BYTE                 MESA_A8
+ *   GL_COLOR_INDEX      GL_UNSIGNED_BYTE                 MESA_C8
+ *   GL_LUMINANCE_ALPHA  GL_UNSIGNED_BYTE                 MESA_L8_A8
+ *   GL_RGB              GL_UNSIGNED_BYTE                 MESA_R5_G6_B5
+ *   GL_RGB              GL_UNSIGNED_SHORT_5_6_5          MESA_R5_G6_B5
+ *   GL_RGBA             GL_UNSIGNED_BYTE                 MESA_A4_R4_G4_B4
+ *   GL_BGRA             GL_UNSIGNED_SHORT_4_4_4_4_REV    MESA_A4_R4_G4_B4
+ *   GL_BGRA             GL_UNSIGHED_SHORT_1_5_5_5_REV    MESA_A1_R5_G5_B5
+ *   GL_BGRA             GL_UNSIGNED_INT_8_8_8_8_REV      MESA_A8_R8_G8_B8
+ *   more to be added for new drivers...
+ *
+ * Notes:
+ *   Some hardware only supports texture images of specific aspect ratios.
+ *   This code will do power-of-two image up-scaling if that's needed.
+ *
+ *
+ */
+GLboolean
+_mesa_convert_teximage(MesaIntTexFormat dstFormat,
+                       GLint dstWidth, GLint dstHeight, GLvoid *dstImage,
+                       GLsizei srcWidth, GLsizei srcHeight,
+                       GLenum srcFormat, GLenum srcType,
+                       const GLvoid *srcImage,
+                       const struct gl_pixelstore_attrib *packing)
+{
+   const GLint wScale = dstWidth / srcWidth;   /* must be power of two */
+   const GLint hScale = dstHeight / srcHeight; /* must be power of two */
+   ASSERT(dstWidth >= srcWidth);
+   ASSERT(dstHeight >= srcHeight);
+   ASSERT(dstImage);
+   ASSERT(srcImage);
+   ASSERT(packing);
+
+   switch (dstFormat) {
+      case MESA_I8:
+      case MESA_L8:
+      case MESA_A8:
+      case MESA_C8:
+         if (srcType != GL_UNSIGNED_BYTE ||
+             ((srcFormat != GL_INTENSITY) &&
+              (srcFormat != GL_LUMINANCE) &&
+              (srcFormat != GL_ALPHA) &&
+              (srcFormat != GL_COLOR_INDEX))) {
+            /* bad internal format / srcFormat combination */
+            return GL_FALSE;
+         }
+         else {
+            /* store as 8-bit texels */
+            if (wScale == 1 && hScale == 1) {
+               /* no scaling needed - fast case */
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLubyte *dst = (GLubyte *) dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  MEMCPY(dst, src, dstWidth * sizeof(GLubyte));
+                  dst += dstWidth;
+                  src += srcStride;
+               }
+            }
+            else {
+               /* must rescale image */
+               GLubyte *dst = (GLubyte *) dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLubyte *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  GLint col;
+                  for (col = 0; col < dstWidth; col++) {
+                     dst[col] = src[col / wScale];
+                  }
+                  dst += dstWidth;
+               }
+            }
+         }
+         break;
+
+      case MESA_L8_A8:
+         if (srcType != GL_UNSIGNED_BYTE || srcFormat != GL_LUMINANCE_ALPHA) {
+            return GL_FALSE;
+         }
+         else {
+            /* store as 16-bit texels */
+            if (wScale == 1 && hScale == 1) {
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLushort *dst = dstImage;
+               GLint row, col;
+               for (row = 0; row < dstHeight; row++) {
+                  for (col = 0; col < dstWidth; col++) {
+                     GLubyte alpha = src[col * 2 + 0];
+                     GLubyte luminance = src[col * 2 + 1];
+                     dst[col] = ((GLushort) luminance << 8) | alpha;
+                  }
+                  dst += dstWidth;
+                  src += srcStride;
+               }
+            }
+            else {
+               /* must rescale */
+               GLushort *dst = dstImage;
+               GLint row, col;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLubyte *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+                  for (col = 0; col < dstWidth; col++) {
+                     GLint srcCol = col / wScale;
+                     GLubyte alpha = src[srcCol * 2 + 0];
+                     GLubyte luminance = src[srcCol * 2 + 1];
+                     dst[col] = ((GLushort) luminance << 8) | alpha;
+                  }
+                  dst += dstWidth;
+                  src += srcStride;
+               }
+            }
+         }
+         break;
+
+      case MESA_R5_G6_B5:
+         if (srcFormat == GL_RGB && srcType == GL_UNSIGNED_SHORT_5_6_5) {
+            /* special, optimized case */
+            if (wScale == 1 && hScale == 1) {
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  MEMCPY(dst, src, dstWidth * sizeof(GLushort));
+                  src += srcStride;
+                  dst += dstWidth;
+               }
+            }
+            else {
+               /* must rescale image */
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLushort *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  GLint col;
+                  for (col = 0; col < dstWidth; col++) {
+                     dst[col] = src[col / wScale];
+                  }
+                  dst += dstWidth;
+               }
+            }
+         }
+         else if (srcFormat == GL_RGB && srcType == GL_UNSIGNED_BYTE) {
+            /* general case */
+            if (wScale == 1 && hScale == 1) {
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint col, col3;
+                  for (col = col3 = 0; col < dstWidth; col++, col3 += 3) {
+                     GLubyte r = src[col3 + 0];
+                     GLubyte g = src[col3 + 1];
+                     GLubyte b = src[col3 + 2];
+                     dst[col] = ((r & 0xf8) << 8)
+                              | ((g & 0xfc) << 3)
+                              | ((b & 0xf8) >> 3);
+                  }
+                  src += srcStride;
+                  dst += dstWidth;
+               }
+            }
+            else {
+               /* must rescale image */
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLubyte *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  GLint col;
+                  for (col = 0; col < dstWidth; col++) {
+                     GLint col3 = (col / wScale) * 3;
+                     GLubyte r = src[col3 + 0];
+                     GLubyte g = src[col3 + 1];
+                     GLubyte b = src[col3 + 2];
+                     dst[col] = ((r & 0xf8) << 8)
+                              | ((g & 0xfc) << 3)
+                              | ((b & 0xf8) >> 3);
+                  }
+                  dst += dstWidth;
+               }
+            }
+         }
+         else {
+            /* can't handle this srcFormat/srcType combination */
+            return GL_FALSE;
+         }
+         break;
+
+      case MESA_A4_R4_G4_B4:
+         /* store as 16-bit texels (GR_TEXFMT_ARGB_4444) */
+         if (srcFormat == GL_BGRA && srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV){
+            /* special, optimized case */
+            if (wScale == 1 && hScale == 1) {
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  MEMCPY(dst, src, dstWidth * sizeof(GLushort));
+                  src += srcStride;
+                  dst += dstWidth;
+               }
+            }
+            else {
+               /* must rescale image */
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLushort *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  GLint col;
+                  for (col = 0; col < dstWidth; col++) {
+                     dst[col] = src[col / wScale];
+                  }
+                  dst += dstWidth;
+               }
+            }
+         }
+         else if (srcFormat == GL_RGBA && srcType == GL_UNSIGNED_BYTE) {
+            /* general case */
+            if (wScale == 1 && hScale == 1) {
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint col, col4;
+                  for (col = col4 = 0; col < dstWidth; col++, col4 += 4) {
+                     GLubyte r = src[col4 + 0];
+                     GLubyte g = src[col4 + 1];
+                     GLubyte b = src[col4 + 2];
+                     GLubyte a = src[col4 + 3];
+                     dst[col] = ((a & 0xf0) << 8)
+                              | ((r & 0xf0) << 4)
+                              | ((g & 0xf0)     )
+                              | ((b & 0xf0) >> 4);
+                  }
+                  src += srcStride;
+                  dst += dstWidth;
+               }
+            }
+            else {
+               /* must rescale image */
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLubyte *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  GLint col;
+                  for (col = 0; col < dstWidth; col++) {
+                     GLint col4 = (col / wScale) * 4;
+                     GLubyte r = src[col4 + 0];
+                     GLubyte g = src[col4 + 1];
+                     GLubyte b = src[col4 + 2];
+                     GLubyte a = src[col4 + 3];
+                     dst[col] = ((a & 0xf0) << 8)
+                              | ((r & 0xf0) << 4)
+                              | ((g & 0xf0)     )
+                              | ((b & 0xf0) >> 4);
+                  }
+                  dst += dstWidth;
+               }
+            }
+         }
+         else {
+            /* can't handle this format/srcType combination */
+            return GL_FALSE;
+         }
+         break;
+
+      case MESA_A1_R5_G5_B5:
+         /* store as 16-bit texels (GR_TEXFMT_ARGB_1555) */
+         if (srcFormat == GL_RGBA && srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV){
+            /* special, optimized case */
+            if (wScale == 1 && hScale == 1) {
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  MEMCPY(dst, src, dstWidth * sizeof(GLushort));
+                  src += srcStride;
+                  dst += dstWidth;
+               }
+            }
+            else {
+               /* must rescale image */
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLushort *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  GLint col;
+                  for (col = 0; col < dstWidth; col++) {
+                     dst[col] = src[col / wScale];
+                  }
+                  dst += dstWidth;
+               }
+            }
+         }
+         else if (srcFormat == GL_RGBA && srcType == GL_UNSIGNED_BYTE) {
+            /* general case */
+            if (wScale == 1 && hScale == 1) {
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint col, col4;
+                  for (col = col4 = 0; col < dstWidth; col++, col4 += 4) {
+                     GLubyte r = src[col4 + 0];
+                     GLubyte g = src[col4 + 1];
+                     GLubyte b = src[col4 + 2];
+                     GLubyte a = src[col4 + 3];
+                     dst[col] = ((a & 0x80) << 8)
+                              | ((r & 0xf8) << 7)
+                              | ((g & 0xf8) << 2)
+                              | ((b & 0xf8) >> 3);
+                  }
+                  src += srcStride;
+                  dst += dstWidth;
+               }
+            }
+            else {
+               /* must rescale image */
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLubyte *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  GLint col;
+                  for (col = 0; col < dstWidth; col++) {
+                     GLint col4 = (col / wScale) * 4;
+                     GLubyte r = src[col4 + 0];
+                     GLubyte g = src[col4 + 1];
+                     GLubyte b = src[col4 + 2];
+                     GLubyte a = src[col4 + 3];
+                     dst[col] = ((a & 0x80) << 8)
+                              | ((r & 0xf8) << 7)
+                              | ((g & 0xf8) << 2)
+                              | ((b & 0xf8) >> 3);
+                  }
+                  dst += dstWidth;
+               }
+            }
+         }
+         else {
+            /* can't handle this source format/type combination */
+            return GL_FALSE;
+         }
+         break;
+
+      case MESA_A8_R8_G8_B8:
+         /* 32-bit texels */
+         if (srcFormat == GL_BGRA && srcType == GL_UNSIGNED_INT_8_8_8_8_REV){
+            /* special, optimized case */
+            if (wScale == 1 && hScale == 1) {
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLuint *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  MEMCPY(dst, src, dstWidth * sizeof(GLuint));
+                  src += srcStride;
+                  dst += dstWidth;
+               }
+            }
+            else {
+               /* must rescale image */
+               GLuint *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLuint *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  GLint col;
+                  for (col = 0; col < dstWidth; col++) {
+                     dst[col] = src[col / wScale];
+                  }
+                  dst += dstWidth;
+               }
+            }
+         }
+         else if (srcFormat == GL_RGBA && srcType == GL_UNSIGNED_BYTE) {
+            /* general case */
+            if (wScale == 1 && hScale == 1) {
+               const GLubyte *src = _mesa_image_address(packing, srcImage,
+                             srcWidth, srcHeight, srcFormat, srcType, 0, 0, 0);
+               const GLint srcStride = _mesa_image_row_stride(packing,
+                                                 srcWidth, srcFormat, srcType);
+               GLuint *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint col, col4;
+                  for (col = col4 = 0; col < dstWidth; col++, col4 += 4) {
+                     GLubyte r = src[col4 + 0];
+                     GLubyte g = src[col4 + 1];
+                     GLubyte b = src[col4 + 2];
+                     GLubyte a = src[col4 + 3];
+                     dst[col] = (a << 24) | (r << 16) | (g << 8) | b;
+                  }
+                  src += srcStride;
+                  dst += dstWidth;
+               }
+            }
+            else {
+               /* must rescale image */
+               GLushort *dst = dstImage;
+               GLint row;
+               for (row = 0; row < dstHeight; row++) {
+                  GLint srcRow = row / hScale;
+                  const GLubyte *src = _mesa_image_address(packing, srcImage,
+                        srcWidth, srcHeight, srcFormat, srcType, 0, srcRow, 0);
+                  GLint col;
+                  for (col = 0; col < dstWidth; col++) {
+                     GLint col4 = (col / wScale) * 4;
+                     GLubyte r = src[col4 + 0];
+                     GLubyte g = src[col4 + 1];
+                     GLubyte b = src[col4 + 2];
+                     GLubyte a = src[col4 + 3];
+                     dst[col] = (a << 24) | (r << 16) | (g << 8) | b;
+                  }
+                  dst += dstWidth;
+               }
+            }
+         }
+         else {
+            /* can't handle this source format/type combination */
+            return GL_FALSE;
+         }
+         break;
+
+
+      default:
+         /* unexpected internal format! */
+         return GL_FALSE;
+   }
+   return GL_TRUE;
+}