mesa: move glGetTexImage(), glGetCompresssedTexImage() code into new file

1 files changed, 2 insertions, 322 deletions

diff --git a/src/mesa/main/texstore.c b/src/mesa/main/texstore.c
index bde69b11485..f3739f950b0 100644
--- a/src/mesa/main/texstore.c
+++ b/src/mesa/main/texstore.c
@@ -1,9 +1,9 @@
 /*
  * Mesa 3-D graphics library
- * Version:  7.3
+ * Version:  7.5
  *
  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
- * Copyright (c) 2008 VMware, Inc.
+ * Copyright (c) 2008-2009  VMware, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -3890,323 +3890,3 @@ _mesa_store_compressed_texsubimage3d(GLcontext *ctx, GLenum target,
    (void) texObj;
    (void) texImage;
 }
-
-
-
-
-#if FEATURE_EXT_texture_sRGB
-
-/**
- * Test if given texture image is an sRGB format.
- */
-static GLboolean
-is_srgb_teximage(const struct gl_texture_image *texImage)
-{
-   switch (texImage->TexFormat->MesaFormat) {
-   case MESA_FORMAT_SRGB8:
-   case MESA_FORMAT_SRGBA8:
-   case MESA_FORMAT_SARGB8:
-   case MESA_FORMAT_SL8:
-   case MESA_FORMAT_SLA8:
-   case MESA_FORMAT_SRGB_DXT1:
-   case MESA_FORMAT_SRGBA_DXT1:
-   case MESA_FORMAT_SRGBA_DXT3:
-   case MESA_FORMAT_SRGBA_DXT5:
-      return GL_TRUE;
-   default:
-      return GL_FALSE;
-   }
-}
-
-
-/**
- * Convert a float value from linear space to a
- * non-linear sRGB value in [0, 255].
- * Not terribly efficient.
- */
-static INLINE GLfloat
-linear_to_nonlinear(GLfloat cl)
-{
-   /* can't have values outside [0, 1] */
-   GLfloat cs;
-   if (cl < 0.0031308) {
-      cs = 12.92 * cl;
-   }
-   else {
-      cs = 1.055 * _mesa_pow(cl, 0.41666) - 0.055;
-   }
-   return cs;
-}
-
-#endif /* FEATURE_EXT_texture_sRGB */
-
-
-/**
- * Can the given type represent negative values?
- */
-static INLINE GLboolean
-type_with_negative_values(GLenum type)
-{
-   switch (type) {
-   case GL_BYTE:
-   case GL_SHORT:
-   case GL_INT:
-   case GL_FLOAT:
-   case GL_HALF_FLOAT_ARB:
-      return GL_TRUE;
-   default:
-      return GL_FALSE;
-   }
-}
-
-
-/**
- * This is the software fallback for Driver.GetTexImage().
- * All error checking will have been done before this routine is called.
- */
-void
-_mesa_get_teximage(GLcontext *ctx, GLenum target, GLint level,
-                   GLenum format, GLenum type, GLvoid *pixels,
-                   struct gl_texture_object *texObj,
-                   struct gl_texture_image *texImage)
-{
-   const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
-
-   if (ctx->Pack.BufferObj->Name) {
-      /* Packing texture image into a PBO.
-       * Map the (potentially) VRAM-based buffer into our process space so
-       * we can write into it with the code below.
-       * A hardware driver might use a sophisticated blit to move the
-       * texture data to the PBO if the PBO is in VRAM along with the texture.
-       */
-      GLubyte *buf = (GLubyte *)
-         ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                               GL_WRITE_ONLY_ARB, ctx->Pack.BufferObj);
-      if (!buf) {
-         /* buffer is already mapped - that's an error */
-         _mesa_error(ctx, GL_INVALID_OPERATION,"glGetTexImage(PBO is mapped)");
-         return;
-      }
-      /* <pixels> was an offset into the PBO.
-       * Now make it a real, client-side pointer inside the mapped region.
-       */
-      pixels = ADD_POINTERS(buf, pixels);
-   }
-   else if (!pixels) {
-      /* not an error */
-      return;
-   }
-
-   {
-      const GLint width = texImage->Width;
-      const GLint height = texImage->Height;
-      const GLint depth = texImage->Depth;
-      GLint img, row;
-      for (img = 0; img < depth; img++) {
-         for (row = 0; row < height; row++) {
-            /* compute destination address in client memory */
-            GLvoid *dest = _mesa_image_address( dimensions, &ctx->Pack, pixels,
-                                                width, height, format, type,
-                                                img, row, 0);
-            assert(dest);
-
-            if (format == GL_COLOR_INDEX) {
-               GLuint indexRow[MAX_WIDTH];
-               GLint col;
-               /* Can't use FetchTexel here because that returns RGBA */
-               if (texImage->TexFormat->IndexBits == 8) {
-                  const GLubyte *src = (const GLubyte *) texImage->Data;
-                  src += width * (img * texImage->Height + row);
-                  for (col = 0; col < width; col++) {
-                     indexRow[col] = src[col];
-                  }
-               }
-               else if (texImage->TexFormat->IndexBits == 16) {
-                  const GLushort *src = (const GLushort *) texImage->Data;
-                  src += width * (img * texImage->Height + row);
-                  for (col = 0; col < width; col++) {
-                     indexRow[col] = src[col];
-                  }
-               }
-               else {
-                  _mesa_problem(ctx,
-                                "Color index problem in _mesa_GetTexImage");
-               }
-               _mesa_pack_index_span(ctx, width, type, dest,
-                                     indexRow, &ctx->Pack,
-                                     0 /* no image transfer */);
-            }
-            else if (format == GL_DEPTH_COMPONENT) {
-               GLfloat depthRow[MAX_WIDTH];
-               GLint col;
-               for (col = 0; col < width; col++) {
-                  (*texImage->FetchTexelf)(texImage, col, row, img,
-                                           depthRow + col);
-               }
-               _mesa_pack_depth_span(ctx, width, dest, type,
-                                     depthRow, &ctx->Pack);
-            }
-            else if (format == GL_DEPTH_STENCIL_EXT) {
-               /* XXX Note: we're bypassing texImage->FetchTexel()! */
-               const GLuint *src = (const GLuint *) texImage->Data;
-               src += width * row + width * height * img;
-               _mesa_memcpy(dest, src, width * sizeof(GLuint));
-               if (ctx->Pack.SwapBytes) {
-                  _mesa_swap4((GLuint *) dest, width);
-               }
-            }
-            else if (format == GL_YCBCR_MESA) {
-               /* No pixel transfer */
-               const GLint rowstride = texImage->RowStride;
-               MEMCPY(dest,
-                      (const GLushort *) texImage->Data + row * rowstride,
-                      width * sizeof(GLushort));
-               /* check for byte swapping */
-               if ((texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR
-                    && type == GL_UNSIGNED_SHORT_8_8_REV_MESA) ||
-                   (texImage->TexFormat->MesaFormat == MESA_FORMAT_YCBCR_REV
-                    && type == GL_UNSIGNED_SHORT_8_8_MESA)) {
-                  if (!ctx->Pack.SwapBytes)
-                     _mesa_swap2((GLushort *) dest, width);
-               }
-               else if (ctx->Pack.SwapBytes) {
-                  _mesa_swap2((GLushort *) dest, width);
-               }
-            }
-#if FEATURE_EXT_texture_sRGB
-            else if (is_srgb_teximage(texImage)) {
-               /* special case this since need to backconvert values */
-               /* convert row to RGBA format */
-               GLfloat rgba[MAX_WIDTH][4];
-               GLint col;
-               GLbitfield transferOps = 0x0;
-
-               for (col = 0; col < width; col++) {
-                  (*texImage->FetchTexelf)(texImage, col, row, img, rgba[col]);
-                  if (texImage->_BaseFormat == GL_LUMINANCE) {
-                     rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);
-                     rgba[col][GCOMP] = 0.0;
-                     rgba[col][BCOMP] = 0.0;
-                  }
-                  else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
-                     rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);
-                     rgba[col][GCOMP] = 0.0;
-                     rgba[col][BCOMP] = 0.0;
-                  }
-                  else if (texImage->_BaseFormat == GL_RGB ||
-                     texImage->_BaseFormat == GL_RGBA) {
-                     rgba[col][RCOMP] = linear_to_nonlinear(rgba[col][RCOMP]);
-                     rgba[col][GCOMP] = linear_to_nonlinear(rgba[col][GCOMP]);
-                     rgba[col][BCOMP] = linear_to_nonlinear(rgba[col][BCOMP]);
-                  }
-               }
-               _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,
-                                          format, type, dest,
-                                          &ctx->Pack, transferOps);
-            }
-#endif /* FEATURE_EXT_texture_sRGB */
-            else {
-               /* general case:  convert row to RGBA format */
-               GLfloat rgba[MAX_WIDTH][4];
-               GLint col;
-               GLbitfield transferOps = 0x0;
-
-               /* clamp does not apply to GetTexImage (final conversion)?
-                * Looks like we need clamp though when going from format
-                * containing negative values to unsigned format.
-                */
-               if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA)
-                  transferOps |= IMAGE_CLAMP_BIT;
-               else if (!type_with_negative_values(type) &&
-                        (texImage->TexFormat->DataType == GL_FLOAT ||
-                         texImage->TexFormat->DataType == GL_SIGNED_NORMALIZED))
-                  transferOps |= IMAGE_CLAMP_BIT;
-
-               for (col = 0; col < width; col++) {
-                  (*texImage->FetchTexelf)(texImage, col, row, img, rgba[col]);
-                  if (texImage->_BaseFormat == GL_ALPHA) {
-                     rgba[col][RCOMP] = 0.0;
-                     rgba[col][GCOMP] = 0.0;
-                     rgba[col][BCOMP] = 0.0;
-                  }
-                  else if (texImage->_BaseFormat == GL_LUMINANCE) {
-                     rgba[col][GCOMP] = 0.0;
-                     rgba[col][BCOMP] = 0.0;
-                     rgba[col][ACOMP] = 1.0;
-                  }
-                  else if (texImage->_BaseFormat == GL_LUMINANCE_ALPHA) {
-                     rgba[col][GCOMP] = 0.0;
-                     rgba[col][BCOMP] = 0.0;
-                  }
-                  else if (texImage->_BaseFormat == GL_INTENSITY) {
-                     rgba[col][GCOMP] = 0.0;
-                     rgba[col][BCOMP] = 0.0;
-                     rgba[col][ACOMP] = 1.0;
-                  }
-               }
-               _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba,
-                                          format, type, dest,
-                                          &ctx->Pack, transferOps);
-            } /* format */
-         } /* row */
-      } /* img */
-   }
-
-   if (ctx->Pack.BufferObj->Name) {
-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                              ctx->Pack.BufferObj);
-   }
-}
-
-
-
-/**
- * This is the software fallback for Driver.GetCompressedTexImage().
- * All error checking will have been done before this routine is called.
- */
-void
-_mesa_get_compressed_teximage(GLcontext *ctx, GLenum target, GLint level,
-                              GLvoid *img,
-                              struct gl_texture_object *texObj,
-                              struct gl_texture_image *texImage)
-{
-   GLuint size;
-
-   if (ctx->Pack.BufferObj->Name) {
-      /* pack texture image into a PBO */
-      GLubyte *buf;
-      if ((const GLubyte *) img + texImage->CompressedSize >
-          (const GLubyte *) ctx->Pack.BufferObj->Size) {
-         _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glGetCompressedTexImage(invalid PBO access)");
-         return;
-      }
-      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                                              GL_WRITE_ONLY_ARB,
-                                              ctx->Pack.BufferObj);
-      if (!buf) {
-         /* buffer is already mapped - that's an error */
-         _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glGetCompressedTexImage(PBO is mapped)");
-         return;
-      }
-      img = ADD_POINTERS(buf, img);
-   }
-   else if (!img) {
-      /* not an error */
-      return;
-   }
-
-   /* don't use texImage->CompressedSize since that may be padded out */
-   size = _mesa_compressed_texture_size(ctx, texImage->Width, texImage->Height,
-                                        texImage->Depth,
-                                        texImage->TexFormat->MesaFormat);
-
-   /* just memcpy, no pixelstore or pixel transfer */
-   _mesa_memcpy(img, texImage->Data, size);
-
-   if (ctx->Pack.BufferObj->Name) {
-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
-                              ctx->Pack.BufferObj);
-   }
-}