Retire miniglx and move the actual glx code up to src/glx

1 files changed, 189 insertions, 0 deletions

diff --git a/src/glx/compsize.c b/src/glx/compsize.c
new file mode 100644
index 0000000000..5ba6dc919e
--- /dev/null
+++ b/src/glx/compsize.c
@@ -0,0 +1,189 @@
+/*
+ * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
+ * Copyright (C) 1991-2000 Silicon Graphics, 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, 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 including the dates of first publication and
+ * either this permission notice or a reference to
+ * http://oss.sgi.com/projects/FreeB/
+ * 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
+ * SILICON GRAPHICS, INC. 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.
+ *
+ * Except as contained in this notice, the name of Silicon Graphics, Inc.
+ * shall not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization from
+ * Silicon Graphics, Inc.
+ */
+
+#include <GL/gl.h>
+#include "glxclient.h"
+
+/*
+** Return the number of elements per group of a specified format
+*/
+GLint
+__glElementsPerGroup(GLenum format, GLenum type)
+{
+   /*
+    ** To make row length computation valid for image extraction,
+    ** packed pixel types assume elements per group equals one.
+    */
+   switch (type) {
+   case GL_UNSIGNED_BYTE_3_3_2:
+   case GL_UNSIGNED_BYTE_2_3_3_REV:
+   case GL_UNSIGNED_SHORT_5_6_5:
+   case GL_UNSIGNED_SHORT_5_6_5_REV:
+   case GL_UNSIGNED_SHORT_4_4_4_4:
+   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+   case GL_UNSIGNED_SHORT_5_5_5_1:
+   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+   case GL_UNSIGNED_SHORT_8_8_APPLE:
+   case GL_UNSIGNED_SHORT_8_8_REV_APPLE:
+   case GL_UNSIGNED_SHORT_15_1_MESA:
+   case GL_UNSIGNED_SHORT_1_15_REV_MESA:
+   case GL_UNSIGNED_INT_8_8_8_8:
+   case GL_UNSIGNED_INT_8_8_8_8_REV:
+   case GL_UNSIGNED_INT_10_10_10_2:
+   case GL_UNSIGNED_INT_2_10_10_10_REV:
+   case GL_UNSIGNED_INT_24_8_NV:
+   case GL_UNSIGNED_INT_24_8_MESA:
+   case GL_UNSIGNED_INT_8_24_REV_MESA:
+      return 1;
+   default:
+      break;
+   }
+
+   switch (format) {
+   case GL_RGB:
+   case GL_BGR:
+      return 3;
+   case GL_422_EXT:
+   case GL_422_REV_EXT:
+   case GL_422_AVERAGE_EXT:
+   case GL_422_REV_AVERAGE_EXT:
+   case GL_YCBCR_422_APPLE:
+   case GL_LUMINANCE_ALPHA:
+      return 2;
+   case GL_RGBA:
+   case GL_BGRA:
+   case GL_ABGR_EXT:
+      return 4;
+   case GL_COLOR_INDEX:
+   case GL_STENCIL_INDEX:
+   case GL_DEPTH_COMPONENT:
+   case GL_RED:
+   case GL_GREEN:
+   case GL_BLUE:
+   case GL_ALPHA:
+   case GL_LUMINANCE:
+   case GL_INTENSITY:
+      return 1;
+   default:
+      return 0;
+   }
+}
+
+/*
+** Return the number of bytes per element, based on the element type (other
+** than GL_BITMAP).
+*/
+GLint
+__glBytesPerElement(GLenum type)
+{
+   switch (type) {
+   case GL_UNSIGNED_SHORT:
+   case GL_SHORT:
+   case GL_UNSIGNED_SHORT_5_6_5:
+   case GL_UNSIGNED_SHORT_5_6_5_REV:
+   case GL_UNSIGNED_SHORT_4_4_4_4:
+   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+   case GL_UNSIGNED_SHORT_5_5_5_1:
+   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+   case GL_UNSIGNED_SHORT_8_8_APPLE:
+   case GL_UNSIGNED_SHORT_8_8_REV_APPLE:
+   case GL_UNSIGNED_SHORT_15_1_MESA:
+   case GL_UNSIGNED_SHORT_1_15_REV_MESA:
+      return 2;
+   case GL_UNSIGNED_BYTE:
+   case GL_BYTE:
+   case GL_UNSIGNED_BYTE_3_3_2:
+   case GL_UNSIGNED_BYTE_2_3_3_REV:
+      return 1;
+   case GL_INT:
+   case GL_UNSIGNED_INT:
+   case GL_FLOAT:
+   case GL_UNSIGNED_INT_8_8_8_8:
+   case GL_UNSIGNED_INT_8_8_8_8_REV:
+   case GL_UNSIGNED_INT_10_10_10_2:
+   case GL_UNSIGNED_INT_2_10_10_10_REV:
+   case GL_UNSIGNED_INT_24_8_NV:
+   case GL_UNSIGNED_INT_24_8_MESA:
+   case GL_UNSIGNED_INT_8_24_REV_MESA:
+      return 4;
+   default:
+      return 0;
+   }
+}
+
+/*
+** Compute memory required for internal packed array of data of given type
+** and format.
+*/
+GLint
+__glImageSize(GLsizei width, GLsizei height, GLsizei depth,
+              GLenum format, GLenum type, GLenum target)
+{
+   int bytes_per_row;
+   int components;
+
+   switch (target) {
+   case GL_PROXY_TEXTURE_1D:
+   case GL_PROXY_TEXTURE_2D:
+   case GL_PROXY_TEXTURE_3D:
+   case GL_PROXY_TEXTURE_4D_SGIS:
+   case GL_PROXY_TEXTURE_CUBE_MAP:
+   case GL_PROXY_TEXTURE_RECTANGLE_ARB:
+   case GL_PROXY_HISTOGRAM:
+   case GL_PROXY_COLOR_TABLE:
+   case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
+   case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
+   case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
+   case GL_PROXY_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP:
+      return 0;
+   }
+
+   if (width < 0 || height < 0 || depth < 0) {
+      return 0;
+   }
+
+   /*
+    ** Zero is returned if either format or type are invalid.
+    */
+   components = __glElementsPerGroup(format, type);
+   if (type == GL_BITMAP) {
+      if (format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX) {
+         bytes_per_row = (width + 7) >> 3;
+      }
+      else {
+         return 0;
+      }
+   }
+   else {
+      bytes_per_row = __glBytesPerElement(type) * width;
+   }
+
+   return bytes_per_row * height * depth * components;
+}