1 /* -*- mode: c; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 3; coding: utf-8-unix -*- */
3 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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33 #include "indirect_size.h"
34 #include "glxclient.h"
37 ** Return the number of elements per group of a specified format
40 __glElementsPerGroup(GLenum format
, GLenum type
)
43 ** To make row length computation valid for image extraction,
44 ** packed pixel types assume elements per group equals one.
47 case GL_UNSIGNED_BYTE_3_3_2
:
48 case GL_UNSIGNED_BYTE_2_3_3_REV
:
49 case GL_UNSIGNED_SHORT_5_6_5
:
50 case GL_UNSIGNED_SHORT_5_6_5_REV
:
51 case GL_UNSIGNED_SHORT_4_4_4_4
:
52 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
53 case GL_UNSIGNED_SHORT_5_5_5_1
:
54 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
55 case GL_UNSIGNED_SHORT_8_8_APPLE
:
56 case GL_UNSIGNED_SHORT_8_8_REV_APPLE
:
57 case GL_UNSIGNED_SHORT_15_1_MESA
:
58 case GL_UNSIGNED_SHORT_1_15_REV_MESA
:
59 case GL_UNSIGNED_INT_8_8_8_8
:
60 case GL_UNSIGNED_INT_8_8_8_8_REV
:
61 case GL_UNSIGNED_INT_10_10_10_2
:
62 case GL_UNSIGNED_INT_2_10_10_10_REV
:
63 case GL_UNSIGNED_INT_24_8_NV
:
64 case GL_UNSIGNED_INT_24_8_MESA
:
65 case GL_UNSIGNED_INT_8_24_REV_MESA
:
77 case GL_422_AVERAGE_EXT
:
78 case GL_422_REV_AVERAGE_EXT
:
79 case GL_YCBCR_422_APPLE
:
80 case GL_LUMINANCE_ALPHA
:
87 case GL_STENCIL_INDEX
:
88 case GL_DEPTH_COMPONENT
:
102 ** Return the number of bytes per element, based on the element type (other
106 __glBytesPerElement(GLenum type
)
109 case GL_UNSIGNED_SHORT
:
111 case GL_UNSIGNED_SHORT_5_6_5
:
112 case GL_UNSIGNED_SHORT_5_6_5_REV
:
113 case GL_UNSIGNED_SHORT_4_4_4_4
:
114 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
115 case GL_UNSIGNED_SHORT_5_5_5_1
:
116 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
117 case GL_UNSIGNED_SHORT_8_8_APPLE
:
118 case GL_UNSIGNED_SHORT_8_8_REV_APPLE
:
119 case GL_UNSIGNED_SHORT_15_1_MESA
:
120 case GL_UNSIGNED_SHORT_1_15_REV_MESA
:
122 case GL_UNSIGNED_BYTE
:
124 case GL_UNSIGNED_BYTE_3_3_2
:
125 case GL_UNSIGNED_BYTE_2_3_3_REV
:
128 case GL_UNSIGNED_INT
:
130 case GL_UNSIGNED_INT_8_8_8_8
:
131 case GL_UNSIGNED_INT_8_8_8_8_REV
:
132 case GL_UNSIGNED_INT_10_10_10_2
:
133 case GL_UNSIGNED_INT_2_10_10_10_REV
:
134 case GL_UNSIGNED_INT_24_8_NV
:
135 case GL_UNSIGNED_INT_24_8_MESA
:
136 case GL_UNSIGNED_INT_8_24_REV_MESA
:
144 ** Compute memory required for internal packed array of data of given type
148 __glImageSize(GLsizei width
, GLsizei height
, GLsizei depth
,
149 GLenum format
, GLenum type
, GLenum target
)
155 case GL_PROXY_TEXTURE_1D
:
156 case GL_PROXY_TEXTURE_2D
:
157 case GL_PROXY_TEXTURE_3D
:
158 case GL_PROXY_TEXTURE_4D_SGIS
:
159 case GL_PROXY_TEXTURE_CUBE_MAP
:
160 case GL_PROXY_TEXTURE_RECTANGLE_ARB
:
161 case GL_PROXY_HISTOGRAM
:
162 case GL_PROXY_COLOR_TABLE
:
163 case GL_PROXY_TEXTURE_COLOR_TABLE_SGI
:
164 case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE
:
165 case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE
:
166 case GL_PROXY_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP
:
170 if (width
< 0 || height
< 0 || depth
< 0) {
175 ** Zero is returned if either format or type are invalid.
177 components
= __glElementsPerGroup(format
, type
);
178 if (type
== GL_BITMAP
) {
179 if (format
== GL_COLOR_INDEX
|| format
== GL_STENCIL_INDEX
) {
180 bytes_per_row
= (width
+ 7) >> 3;
187 bytes_per_row
= __glBytesPerElement(type
) * width
;
190 return bytes_per_row
* height
* depth
* components
;