1GLTEXIMAGE2D(3G) [FIXME: manual] GLTEXIMAGE2D(3G)
2
6 glTexImage2D - specify a two-dimensional texture image
7
9 void glTexImage2D(GLenum target, GLint level, GLint internalFormat,
10 GLsizei width, GLsizei height, GLint border,
11 GLenum format, GLenum type, const GLvoid * data);
12
14 target
15 Specifies the target texture. Must be GL_TEXTURE_2D,
16 GL_PROXY_TEXTURE_2D, GL_TEXTURE_1D_ARRAY,
17 GL_PROXY_TEXTURE_1D_ARRAY, GL_TEXTURE_RECTANGLE,
18 GL_PROXY_TEXTURE_RECTANGLE, GL_TEXTURE_CUBE_MAP_POSITIVE_X,
19 GL_TEXTURE_CUBE_MAP_NEGATIVE_X, GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
20 GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
21 GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, or GL_PROXY_TEXTURE_CUBE_MAP.
22 level
24 Specifies the level-of-detail number. Level 0 is the base image
25 level. Level n is the nth mipmap reduction image. If target is
26 GL_TEXTURE_RECTANGLE or GL_PROXY_TEXTURE_RECTANGLE, level must be
27 0.
28 internalFormat
30 Specifies the number of color components in the texture. Must be
31 one of base internal formats given in Table 1, one of the sized
32 internal formats given in Table 2, or one of the compressed
33 internal formats given in Table 3, below.
34 width
36 Specifies the width of the texture image. All implementations
37 support texture images that are at least 1024 texels wide.
38 height
40 Specifies the height of the texture image, or the number of layers
41 in a texture array, in the case of the GL_TEXTURE_1D_ARRAY and
42 GL_PROXY_TEXTURE_1D_ARRAY targets. All implementations support 2D
43 texture images that are at least 1024 texels high, and texture
44 arrays that are at least 256 layers deep.
45 border
47 This value must be 0.
48 format
50 Specifies the format of the pixel data. The following symbolic
51 values are accepted: GL_RED, GL_RG, GL_RGB, GL_BGR, GL_RGBA,
52 GL_BGRA, GL_RED_INTEGER, GL_RG_INTEGER, GL_RGB_INTEGER,
53 GL_BGR_INTEGER, GL_RGBA_INTEGER, GL_BGRA_INTEGER, GL_STENCIL_INDEX,
54 GL_DEPTH_COMPONENT, GL_DEPTH_STENCIL.
55 type
57 Specifies the data type of the pixel data. The following symbolic
58 values are accepted: GL_UNSIGNED_BYTE, GL_BYTE, GL_UNSIGNED_SHORT,
59 GL_SHORT, GL_UNSIGNED_INT, GL_INT, GL_FLOAT,
60 GL_UNSIGNED_BYTE_3_3_2, GL_UNSIGNED_BYTE_2_3_3_REV,
61 GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT_5_6_5_REV,
62 GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_SHORT_4_4_4_4_REV,
63 GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_SHORT_1_5_5_5_REV,
64 GL_UNSIGNED_INT_8_8_8_8, GL_UNSIGNED_INT_8_8_8_8_REV,
65 GL_UNSIGNED_INT_10_10_10_2, and GL_UNSIGNED_INT_2_10_10_10_REV.
66 data
68 Specifies a pointer to the image data in memory.
69
71 Texturing allows elements of an image array to be read by shaders.
72 To define texture images, call glTexImage2D. The arguments describe the
74 parameters of the texture image, such as height, width, width of the
75 border, level-of-detail number (see glTexParameter()), and number of
76 color components provided. The last three arguments describe how the
77 image is represented in memory.
78 If target is GL_PROXY_TEXTURE_2D, GL_PROXY_TEXTURE_1D_ARRAY,
80 GL_PROXY_TEXTURE_CUBE_MAP, or GL_PROXY_TEXTURE_RECTANGLE, no data is
81 read from data, but all of the texture image state is recalculated,
82 checked for consistency, and checked against the implementation's
83 capabilities. If the implementation cannot handle a texture of the
84 requested texture size, it sets all of the image state to 0, but does
85 not generate an error (see glGetError()). To query for an entire mipmap
86 array, use an image array level greater than or equal to 1.
87 If target is GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE or one of the
89 GL_TEXTURE_CUBE_MAP targets, data is read from data as a sequence of
90 signed or unsigned bytes, shorts, or longs, or single-precision
91 floating-point values, depending on type. These values are grouped into
92 sets of one, two, three, or four values, depending on format, to form
93 elements. Each data byte is treated as eight 1-bit elements, with bit
94 ordering determined by GL_UNPACK_LSB_FIRST (see glPixelStore()).
95 If target is GL_TEXTURE_1D_ARRAY, data is interpreted as an array of
97 one-dimensional images.
98 If a non-zero named buffer object is bound to the
100 GL_PIXEL_UNPACK_BUFFER target (see glBindBuffer()) while a texture
101 image is specified, data is treated as a byte offset into the buffer
102 object's data store.
103 The first element corresponds to the lower left corner of the texture
105 image. Subsequent elements progress left-to-right through the remaining
106 texels in the lowest row of the texture image, and then in successively
107 higher rows of the texture image. The final element corresponds to the
108 upper right corner of the texture image.
109 format determines the composition of each element in data. It can
111 assume one of these symbolic values:
112 GL_RED
114 Each element is a single red component. The GL converts it to
115 floating point and assembles it into an RGBA element by attaching 0
116 for green and blue, and 1 for alpha. Each component is clamped to
117 the range [0,1].
118 GL_RG
120 Each element is a red/green double. The GL converts it to floating
121 point and assembles it into an RGBA element by attaching 0 for
122 blue, and 1 for alpha. Each component is clamped to the range
123 [0,1].
124 GL_RGB, GL_BGR
126 Each element is an RGB triple. The GL converts it to floating point
127 and assembles it into an RGBA element by attaching 1 for alpha.
128 Each component is clamped to the range [0,1].
129 GL_RGBA, GL_BGRA
131 Each element contains all four components. Each component is
132 clamped to the range [0,1].
133 GL_DEPTH_COMPONENT
135 Each element is a single depth value. The GL converts it to
136 floating point and clamps to the range [0,1].
137 GL_DEPTH_STENCIL
139 Each element is a pair of depth and stencil values. The depth
140 component of the pair is interpreted as in GL_DEPTH_COMPONENT. The
141 stencil component is interpreted based on specified the depth +
142 stencil internal format.
143 If an application wants to store the texture at a certain resolution or
145 in a certain format, it can request the resolution and format with
146 internalFormat. The GL will choose an internal representation that
147 closely approximates that requested by internalFormat, but it may not
148 match exactly. (The representations specified by GL_RED, GL_RG, GL_RGB,
149 and GL_RGBA must match exactly.)
150 internalFormat may be one of the base internal formats shown in Table
152 1, below
153 Table 1. Base Internal Formats
155 ┌───────────────────┬───────────────────┬─────────────────────┐
156 │Base Internal │ RGBA, Depth and │ Internal Components │
157 │Format │ Stencil Values │ │
158 ├───────────────────┼───────────────────┼─────────────────────┤
159 │GL_DEPTH_COMPONENT │ Depth │ D │
160 ├───────────────────┼───────────────────┼─────────────────────┤
161 │GL_DEPTH_STENCIL │ Depth, Stencil │ D, S │
162 ├───────────────────┼───────────────────┼─────────────────────┤
163 │GL_RED │ Red │ R │
164 ├───────────────────┼───────────────────┼─────────────────────┤
165 │GL_RG │ Red, Green │ R, G │
166 ├───────────────────┼───────────────────┼─────────────────────┤
167 │GL_RGB │ Red, Green, Blue │ R, G, B │
168 ├───────────────────┼───────────────────┼─────────────────────┤
169 │GL_RGBA │ Red, Green, Blue, │ R, G, B, A │
170 │ │ Alpha │ │
171 └───────────────────┴───────────────────┴─────────────────────┘
172 internalFormat may also be one of the sized internal formats shown in
174 Table 2, below
175 Table 2. Sized Internal Formats
177 ┌──────────────────┬──────────┬──────────┬────────────┬───────────┬────────────┬────────┐
178 │Sized │ Base │ Red Bits │ Green Bits │ Blue Bits │ Alpha Bits │ Shared │
179 │Internal │ Internal │ │ │ │ │ Bits │
180 │Format │ Format │ │ │ │ │ │
181 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
182 │GL_R8 │ GL_RED │ 8 │ │ │ │ │
183 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
184 │GL_R8_SNORM │ GL_RED │ s8 │ │ │ │ │
185 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
186 │GL_R16 │ GL_RED │ 16 │ │ │ │ │
187 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
188 │GL_R16_SNORM │ GL_RED │ s16 │ │ │ │ │
189 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
190 │GL_RG8 │ GL_RG │ 8 │ 8 │ │ │ │
191 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
192 │GL_RG8_SNORM │ GL_RG │ s8 │ s8 │ │ │ │
193 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
194 │GL_RG16 │ GL_RG │ 16 │ 16 │ │ │ │
195 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
196 │GL_RG16_SNORM │ GL_RG │ s16 │ s16 │ │ │ │
197 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
198 │GL_R3_G3_B2 │ GL_RGB │ 3 │ 3 │ 2 │ │ │
199 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
200 │GL_RGB4 │ GL_RGB │ 4 │ 4 │ 4 │ │ │
201 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
202 │GL_RGB5 │ GL_RGB │ 5 │ 5 │ 5 │ │ │
203 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
204 │GL_RGB8 │ GL_RGB │ 8 │ 8 │ 8 │ │ │
205 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
206 │GL_RGB8_SNORM │ GL_RGB │ s8 │ s8 │ s8 │ │ │
207 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
208 │GL_RGB10 │ GL_RGB │ 10 │ 10 │ 10 │ │ │
209 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
210 │GL_RGB12 │ GL_RGB │ 12 │ 12 │ 12 │ │ │
211 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
212 │GL_RGB16_SNORM │ GL_RGB │ 16 │ 16 │ 16 │ │ │
213 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
214 │GL_RGBA2 │ GL_RGB │ 2 │ 2 │ 2 │ 2 │ │
215 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
216 │GL_RGBA4 │ GL_RGB │ 4 │ 4 │ 4 │ 4 │ │
217 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
218 │GL_RGB5_A1 │ GL_RGBA │ 5 │ 5 │ 5 │ 1 │ │
219 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
220 │GL_RGBA8 │ GL_RGBA │ 8 │ 8 │ 8 │ 8 │ │
221 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
222 │GL_RGBA8_SNORM │ GL_RGBA │ s8 │ s8 │ s8 │ s8 │ │
223 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
224 │GL_RGB10_A2 │ GL_RGBA │ 10 │ 10 │ 10 │ 2 │ │
225 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
226 │GL_RGB10_A2UI │ GL_RGBA │ ui10 │ ui10 │ ui10 │ ui2 │ │
227 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
228 │GL_RGBA12 │ GL_RGBA │ 12 │ 12 │ 12 │ 12 │ │
229 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
230 │GL_RGBA16 │ GL_RGBA │ 16 │ 16 │ 16 │ 16 │ │
231 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
232 │GL_SRGB8 │ GL_RGB │ 8 │ 8 │ 8 │ │ │
233 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
234 │GL_SRGB8_ALPHA8 │ GL_RGBA │ 8 │ 8 │ 8 │ 8 │ │
235 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
236 │GL_R16F │ GL_RED │ f16 │ │ │ │ │
237 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
238 │GL_RG16F │ GL_RG │ f16 │ f16 │ │ │ │
239 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
240 │GL_RGB16F │ GL_RGB │ f16 │ f16 │ f16 │ │ │
241 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
242 │GL_RGBA16F │ GL_RGBA │ f16 │ f16 │ f16 │ f16 │ │
243 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
244 │GL_R32F │ GL_RED │ f32 │ │ │ │ │
245 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
246 │GL_RG32F │ GL_RG │ f32 │ f32 │ │ │ │
247 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
248 │GL_RGB32F │ GL_RGB │ f32 │ f32 │ f32 │ │ │
249 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
250 │GL_RGBA32F │ GL_RGBA │ f32 │ f32 │ f32 │ f32 │ │
251 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
252 │GL_R11F_G11F_B10F │ GL_RGB │ f11 │ f11 │ f10 │ │ │
253 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
254 │GL_RGB9_E5 │ GL_RGB │ 9 │ 9 │ 9 │ │ 5 │
255 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
256 │GL_R8I │ GL_RED │ i8 │ │ │ │ │
257 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
258 │GL_R8UI │ GL_RED │ ui8 │ │ │ │ │
259 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
260 │GL_R16I │ GL_RED │ i16 │ │ │ │ │
261 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
262 │GL_R16UI │ GL_RED │ ui16 │ │ │ │ │
263 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
264 │GL_R32I │ GL_RED │ i32 │ │ │ │ │
265 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
266 │GL_R32UI │ GL_RED │ ui32 │ │ │ │ │
267 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
268 │GL_RG8I │ GL_RG │ i8 │ i8 │ │ │ │
269 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
270 │GL_RG8UI │ GL_RG │ ui8 │ ui8 │ │ │ │
271 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
272 │GL_RG16I │ GL_RG │ i16 │ i16 │ │ │ │
273 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
274 │GL_RG16UI │ GL_RG │ ui16 │ ui16 │ │ │ │
275 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
276 │GL_RG32I │ GL_RG │ i32 │ i32 │ │ │ │
277 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
278 │GL_RG32UI │ GL_RG │ ui32 │ ui32 │ │ │ │
279 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
280 │GL_RGB8I │ GL_RGB │ i8 │ i8 │ i8 │ │ │
281 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
282 │GL_RGB8UI │ GL_RGB │ ui8 │ ui8 │ ui8 │ │ │
283 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
284 │GL_RGB16I │ GL_RGB │ i16 │ i16 │ i16 │ │ │
285 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
286 │GL_RGB16UI │ GL_RGB │ ui16 │ ui16 │ ui16 │ │ │
287 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
288 │GL_RGB32I │ GL_RGB │ i32 │ i32 │ i32 │ │ │
289 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
290 │GL_RGB32UI │ GL_RGB │ ui32 │ ui32 │ ui32 │ │ │
291 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
292 │GL_RGBA8I │ GL_RGBA │ i8 │ i8 │ i8 │ i8 │ │
293 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
294 │GL_RGBA8UI │ GL_RGBA │ ui8 │ ui8 │ ui8 │ ui8 │ │
295 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
296 │GL_RGBA16I │ GL_RGBA │ i16 │ i16 │ i16 │ i16 │ │
297 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
298 │GL_RGBA16UI │ GL_RGBA │ ui16 │ ui16 │ ui16 │ ui16 │ │
299 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
300 │GL_RGBA32I │ GL_RGBA │ i32 │ i32 │ i32 │ i32 │ │
301 ├──────────────────┼──────────┼──────────┼────────────┼───────────┼────────────┼────────┤
302 │GL_RGBA32UI │ GL_RGBA │ ui32 │ ui32 │ ui32 │ ui32 │ │
303 └──────────────────┴──────────┴──────────┴────────────┴───────────┴────────────┴────────┘
304 Finally, internalFormat may also be one of the generic or compressed
306 compressed texture formats shown in Table 3 below
307 Table 3. Compressed Internal Formats
309 ┌──────────────────────────────────────┬───────────────┬──────────┐
310 │Compressed Internal │ Base Internal │ Type │
311 │Format │ Format │ │
312 ├──────────────────────────────────────┼───────────────┼──────────┤
313 │GL_COMPRESSED_RED │ GL_RED │ Generic │
314 ├──────────────────────────────────────┼───────────────┼──────────┤
315 │GL_COMPRESSED_RG │ GL_RG │ Generic │
316 ├──────────────────────────────────────┼───────────────┼──────────┤
317 │GL_COMPRESSED_RGB │ GL_RGB │ Generic │
318 ├──────────────────────────────────────┼───────────────┼──────────┤
319 │GL_COMPRESSED_RGBA │ GL_RGBA │ Generic │
320 ├──────────────────────────────────────┼───────────────┼──────────┤
321 │GL_COMPRESSED_SRGB │ GL_RGB │ Generic │
322 ├──────────────────────────────────────┼───────────────┼──────────┤
323 │GL_COMPRESSED_SRGB_ALPHA │ GL_RGBA │ Generic │
324 ├──────────────────────────────────────┼───────────────┼──────────┤
325 │GL_COMPRESSED_RED_RGTC1 │ GL_RED │ Specific │
326 ├──────────────────────────────────────┼───────────────┼──────────┤
327 │GL_COMPRESSED_SIGNED_RED_RGTC1 │ GL_RED │ Specific │
328 ├──────────────────────────────────────┼───────────────┼──────────┤
329 │GL_COMPRESSED_RG_RGTC2 │ GL_RG │ Specific │
330 ├──────────────────────────────────────┼───────────────┼──────────┤
331 │GL_COMPRESSED_SIGNED_RG_RGTC2 │ GL_RG │ Specific │
332 ├──────────────────────────────────────┼───────────────┼──────────┤
333 │GL_COMPRESSED_RGBA_BPTC_UNORM │ GL_RGBA │ Specific │
334 ├──────────────────────────────────────┼───────────────┼──────────┤
335 │GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM │ GL_RGBA │ Specific │
336 ├──────────────────────────────────────┼───────────────┼──────────┤
337 │GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT │ GL_RGB │ Specific │
338 ├──────────────────────────────────────┼───────────────┼──────────┤
339 │GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT │ GL_RGB │ Specific │
340 └──────────────────────────────────────┴───────────────┴──────────┘
341 If the internalFormat parameter is one of the generic compressed
343 formats, GL_COMPRESSED_RED, GL_COMPRESSED_RG, GL_COMPRESSED_RGB, or
344 GL_COMPRESSED_RGBA, the GL will replace the internal format with the
345 symbolic constant for a specific internal format and compress the
346 texture before storage. If no corresponding internal format is
347 available, or the GL can not compress that image for any reason, the
348 internal format is instead replaced with a corresponding base internal
349 format.
350 If the internalFormat parameter is GL_SRGB, GL_SRGB8, GL_SRGB_ALPHA, or
352 GL_SRGB8_ALPHA8, the texture is treated as if the red, green, or blue
353 components are encoded in the sRGB color space. Any alpha component is
354 left unchanged. The conversion from the sRGB encoded component c s to a
355 linear component c l is:
356 c l = { c s 12.92 if c s ≤ 0.04045 ( c s + 0.055 1.055 ) 2.4 if c s >
358 0.04045
359 Assume c s is the sRGB component in the range [0,1].
361 Use the GL_PROXY_TEXTURE_2D, GL_PROXY_TEXTURE_1D_ARRAY,
363 GL_PROXY_TEXTURE_RECTANGLE, or GL_PROXY_TEXTURE_CUBE_MAP target to try
364 out a resolution and format. The implementation will update and
365 recompute its best match for the requested storage resolution and
366 format. To then query this state, call glGetTexLevelParameter(). If the
367 texture cannot be accommodated, texture state is set to 0.
368 A one-component texture image uses only the red component of the RGBA
370 color extracted from data. A two-component image uses the R and G
371 values. A three-component image uses the R, G, and B values. A
372 four-component image uses all of the RGBA components.
373 Image-based shadowing can be enabled by comparing texture r coordinates
375 to depth texture values to generate a boolean result. See
376 glTexParameter() for details on texture comparison.
377
379 The glPixelStore() mode affects texture images.
380 data may be a null pointer. In this case, texture memory is allocated
382 to accommodate a texture of width width and height height. You can then
383 download subtextures to initialize this texture memory. The image is
384 undefined if the user tries to apply an uninitialized portion of the
385 texture image to a primitive.
386 glTexImage2D specifies the two-dimensional texture for the current
388 texture unit, specified with glActiveTexture().
389 GL_STENCIL_INDEX may be used for format only if the GL version is 4.4
391 or higher.
392
394 GL_INVALID_ENUM is generated if target is not GL_TEXTURE_2D,
395 GL_TEXTURE_1D_ARRAY, GL_TEXTURE_RECTANGLE, GL_PROXY_TEXTURE_2D,
396 GL_PROXY_TEXTURE_1D_ARRAY, GL_PROXY_TEXTURE_RECTANGLE,
397 GL_PROXY_TEXTURE_CUBE_MAP, GL_TEXTURE_CUBE_MAP_POSITIVE_X,
398 GL_TEXTURE_CUBE_MAP_NEGATIVE_X, GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
399 GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, GL_TEXTURE_CUBE_MAP_POSITIVE_Z, or
400 GL_TEXTURE_CUBE_MAP_NEGATIVE_Z.
401 GL_INVALID_ENUM is generated if target is one of the six cube map 2D
403 image targets and the width and height parameters are not equal.
404 GL_INVALID_ENUM is generated if type is not a type constant.
406 GL_INVALID_VALUE is generated if width is less than 0 or greater than
408 GL_MAX_TEXTURE_SIZE.
409 GL_INVALID_VALUE is generated if target is not GL_TEXTURE_1D_ARRAY or
411 GL_PROXY_TEXTURE_1D_ARRAY and height is less than 0 or greater than
412 GL_MAX_TEXTURE_SIZE.
413 GL_INVALID_VALUE is generated if target is GL_TEXTURE_1D_ARRAY or
415 GL_PROXY_TEXTURE_1D_ARRAY and height is less than 0 or greater than
416 GL_MAX_ARRAY_TEXTURE_LAYERS.
417 GL_INVALID_VALUE is generated if level is less than 0.
419 GL_INVALID_VALUE may be generated if level is greater than log 2 max,
421 where max is the returned value of GL_MAX_TEXTURE_SIZE.
422 GL_INVALID_VALUE is generated if internalFormat is not one of the
424 accepted resolution and format symbolic constants.
425 GL_INVALID_VALUE is generated if width or height is less than 0 or
427 greater than GL_MAX_TEXTURE_SIZE.
428 GL_INVALID_VALUE is generated if border is not 0.
430 GL_INVALID_OPERATION is generated if type is one of
432 GL_UNSIGNED_BYTE_3_3_2, GL_UNSIGNED_BYTE_2_3_3_REV,
433 GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT_5_6_5_REV, or
434 GL_UNSIGNED_INT_10F_11F_11F_REV, and format is not GL_RGB.
435 GL_INVALID_OPERATION is generated if type is one of
437 GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_SHORT_4_4_4_4_REV,
438 GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_SHORT_1_5_5_5_REV,
439 GL_UNSIGNED_INT_8_8_8_8, GL_UNSIGNED_INT_8_8_8_8_REV,
440 GL_UNSIGNED_INT_10_10_10_2, GL_UNSIGNED_INT_2_10_10_10_REV, or
441 GL_UNSIGNED_INT_5_9_9_9_REV, and format is neither GL_RGBA nor GL_BGRA.
442 GL_INVALID_OPERATION is generated if target is not GL_TEXTURE_2D,
444 GL_PROXY_TEXTURE_2D, GL_TEXTURE_RECTANGLE, or
445 GL_PROXY_TEXTURE_RECTANGLE, and internalFormat is GL_DEPTH_COMPONENT,
446 GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24, or GL_DEPTH_COMPONENT32F.
447 GL_INVALID_OPERATION is generated if format is GL_DEPTH_COMPONENT and
449 internalFormat is not GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT16,
450 GL_DEPTH_COMPONENT24, or GL_DEPTH_COMPONENT32F.
451 GL_INVALID_OPERATION is generated if internalFormat is
453 GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24, or
454 GL_DEPTH_COMPONENT32F, and format is not GL_DEPTH_COMPONENT.
455 GL_INVALID_OPERATION is generated if a non-zero buffer object name is
457 bound to the GL_PIXEL_UNPACK_BUFFER target and the buffer object's data
458 store is currently mapped.
459 GL_INVALID_OPERATION is generated if a non-zero buffer object name is
461 bound to the GL_PIXEL_UNPACK_BUFFER target and the data would be
462 unpacked from the buffer object such that the memory reads required
463 would exceed the data store size.
464 GL_INVALID_OPERATION is generated if a non-zero buffer object name is
466 bound to the GL_PIXEL_UNPACK_BUFFER target and data is not evenly
467 divisible into the number of bytes needed to store in memory a datum
468 indicated by type.
469 GL_INVALID_VALUE is generated if target is GL_TEXTURE_RECTANGLE or
471 GL_PROXY_TEXTURE_RECTANGLE and level is not 0.
472
474 glGetTexImage()
475 glGet() with argument GL_PIXEL_UNPACK_BUFFER_BINDING
477
479 ┌─────────────┬───────────────────────────────────────────────────────────────────────┐
480 │ │ OpenGL Version │
481 ├─────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
482 │Function │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
483 │/ │ │ │ │ │ │ │ │ │ │ │ │ │
484 │Feature │ │ │ │ │ │ │ │ │ │ │ │ │
485 │Name │ │ │ │ │ │ │ │ │ │ │ │ │
486 ├─────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
487 │glTexImage2D │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │ ✔ │
488 └─────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘
489
491 glActiveTexture(), glCopyTexImage1D(), glCopyTexImage2D(),
492 glCopyTexSubImage1D(), glCopyTexSubImage2D(), glCopyTexSubImage3D(),
493 glPixelStore(), glTexImage1D(), glTexImage3D(), glTexSubImage1D(),
494 glTexSubImage2D(), glTexSubImage3D(), glTexParameter()
495
497 Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2011-2014
498 Khronos Group. This document is licensed under the SGI Free Software B
499 License. For details, see http://oss.sgi.com/projects/FreeB/.
500
502 Copyright © 1991-2006 Silicon Graphics, Inc.
503[FIXME: source] 07/13/2018 GLTEXIMAGE2D(3G)