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1 | <?xml version="1.0" encoding="UTF-8"?> |
2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> | |
3 | <!-- saved from url=(0013)about:internet --> | |
4 | <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glBlendFunc - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glBlendFunc"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glBlendFunc — specify pixel arithmetic</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" style="padding-bottom: 1em"><tr><td><code class="funcdef">void <b class="fsfunc">glBlendFunc</b>(</code></td><td>GLenum </td><td><var class="pdparam">sfactor</var>, </td></tr><tr><td> </td><td>GLenum </td><td><var class="pdparam">dfactor</var><code>)</code>;</td></tr></table><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glBlendFunci</b>(</code></td><td>GLuint </td><td><var class="pdparam">buf</var>, </td></tr><tr><td> </td><td>GLenum </td><td><var class="pdparam">sfactor</var>, </td></tr><tr><td> </td><td>GLenum </td><td><var class="pdparam">dfactor</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>buf</code></em></span></dt><dd><p> | |
5 | For <code class="function">glBlendFunci</code>, specifies the index of the draw | |
6 | buffer for which to set the blend function. | |
7 | </p></dd><dt><span class="term"><em class="parameter"><code>sfactor</code></em></span></dt><dd><p> | |
8 | Specifies how the red, green, blue, | |
9 | and alpha source blending factors are computed. | |
10 | The initial value is <code class="constant">GL_ONE</code>. | |
11 | </p></dd><dt><span class="term"><em class="parameter"><code>dfactor</code></em></span></dt><dd><p> | |
12 | Specifies how the red, green, blue, | |
13 | and alpha destination blending factors are computed. | |
14 | The following symbolic constants are accepted: | |
15 | <code class="constant">GL_ZERO</code>, | |
16 | <code class="constant">GL_ONE</code>, | |
17 | <code class="constant">GL_SRC_COLOR</code>, | |
18 | <code class="constant">GL_ONE_MINUS_SRC_COLOR</code>, | |
19 | <code class="constant">GL_DST_COLOR</code>, | |
20 | <code class="constant">GL_ONE_MINUS_DST_COLOR</code>, | |
21 | <code class="constant">GL_SRC_ALPHA</code>, | |
22 | <code class="constant">GL_ONE_MINUS_SRC_ALPHA</code>, | |
23 | <code class="constant">GL_DST_ALPHA</code>, | |
24 | <code class="constant">GL_ONE_MINUS_DST_ALPHA</code>. | |
25 | <code class="constant">GL_CONSTANT_COLOR</code>, | |
26 | <code class="constant">GL_ONE_MINUS_CONSTANT_COLOR</code>, | |
27 | <code class="constant">GL_CONSTANT_ALPHA</code>, and | |
28 | <code class="constant">GL_ONE_MINUS_CONSTANT_ALPHA</code>. | |
29 | The initial value is <code class="constant">GL_ZERO</code>. | |
30 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
31 | Pixels can be drawn using a function that blends | |
32 | the incoming (source) RGBA values with the RGBA values | |
33 | that are already in the frame buffer (the destination values). | |
34 | Blending is initially disabled. | |
35 | Use <a href="glEnable.xml"><span class="citerefentry"><span class="refentrytitle">glEnable</span></span></a> and <a href="glDisable.xml"><span class="citerefentry"><span class="refentrytitle">glDisable</span></span></a> with argument <code class="constant">GL_BLEND</code> | |
36 | to enable and disable blending. | |
37 | </p><p> | |
38 | <code class="function">glBlendFunc</code> defines the operation of blending for all draw buffers when it is enabled. | |
39 | <code class="function">glBlendFunci</code> defines the operation of blending for a single draw buffer | |
40 | specified by <em class="parameter"><code>buf</code></em> when enabled for that draw buffer. | |
41 | <em class="parameter"><code>sfactor</code></em> specifies which method is used to scale the | |
42 | source color components. | |
43 | <em class="parameter"><code>dfactor</code></em> specifies which method is used to scale the | |
44 | destination color components. | |
45 | Both parameters must be one of the following symbolic constants: | |
46 | <code class="constant">GL_ZERO</code>, | |
47 | <code class="constant">GL_ONE</code>, | |
48 | <code class="constant">GL_SRC_COLOR</code>, | |
49 | <code class="constant">GL_ONE_MINUS_SRC_COLOR</code>, | |
50 | <code class="constant">GL_DST_COLOR</code>, | |
51 | <code class="constant">GL_ONE_MINUS_DST_COLOR</code>, | |
52 | <code class="constant">GL_SRC_ALPHA</code>, | |
53 | <code class="constant">GL_ONE_MINUS_SRC_ALPHA</code>, | |
54 | <code class="constant">GL_DST_ALPHA</code>, | |
55 | <code class="constant">GL_ONE_MINUS_DST_ALPHA</code>, | |
56 | <code class="constant">GL_CONSTANT_COLOR</code>, | |
57 | <code class="constant">GL_ONE_MINUS_CONSTANT_COLOR</code>, | |
58 | <code class="constant">GL_CONSTANT_ALPHA</code>, | |
59 | <code class="constant">GL_ONE_MINUS_CONSTANT_ALPHA</code>, | |
60 | <code class="constant">GL_SRC_ALPHA_SATURATE</code>, | |
61 | <code class="constant">GL_SRC1_COLOR</code>, | |
62 | <code class="constant">GL_ONE_MINUS_SRC1_COLOR</code>, | |
63 | <code class="constant">GL_SRC1_ALPHA</code>, and | |
64 | <code class="constant">GL_ONE_MINUS_SRC1_ALPHA</code>. | |
65 | The possible methods are described in the following table. | |
66 | Each method defines four scale factors, | |
67 | one each for red, green, blue, and alpha. | |
68 | In the table and in subsequent equations, first source, second source | |
69 | and destination color components are referred to as | |
70 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
71 | ||
72 | <mml:mfenced open="(" close=")"> | |
73 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
74 | <mml:mi mathvariant="italic">s0</mml:mi> | |
75 | </mml:msub> | |
76 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
77 | <mml:mi mathvariant="italic">s0</mml:mi> | |
78 | </mml:msub> | |
79 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
80 | <mml:mi mathvariant="italic">s0</mml:mi> | |
81 | </mml:msub> | |
82 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
83 | <mml:mi mathvariant="italic">s0</mml:mi> | |
84 | </mml:msub> | |
85 | </mml:mfenced> | |
86 | </mml:math>, | |
87 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
88 | ||
89 | <mml:mfenced open="(" close=")"> | |
90 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
91 | <mml:mi mathvariant="italic">s1</mml:mi> | |
92 | </mml:msub> | |
93 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
94 | <mml:mi mathvariant="italic">s1</mml:mi> | |
95 | </mml:msub> | |
96 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
97 | <mml:mi mathvariant="italic">s1</mml:mi> | |
98 | </mml:msub> | |
99 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
100 | <mml:mi mathvariant="italic">s1</mml:mi> | |
101 | </mml:msub> | |
102 | </mml:mfenced> | |
103 | </mml:math> | |
104 | and | |
105 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
106 | ||
107 | <mml:mfenced open="(" close=")"> | |
108 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
109 | <mml:mi mathvariant="italic">d</mml:mi> | |
110 | </mml:msub> | |
111 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
112 | <mml:mi mathvariant="italic">d</mml:mi> | |
113 | </mml:msub> | |
114 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
115 | <mml:mi mathvariant="italic">d</mml:mi> | |
116 | </mml:msub> | |
117 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
118 | <mml:mi mathvariant="italic">d</mml:mi> | |
119 | </mml:msub> | |
120 | </mml:mfenced> | |
121 | </mml:math>, respectively. | |
122 | The color specified by <a href="glBlendColor.xml"><span class="citerefentry"><span class="refentrytitle">glBlendColor</span></span></a> is referred to as | |
123 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
124 | ||
125 | <mml:mfenced open="(" close=")"> | |
126 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
127 | <mml:mi mathvariant="italic">c</mml:mi> | |
128 | </mml:msub> | |
129 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
130 | <mml:mi mathvariant="italic">c</mml:mi> | |
131 | </mml:msub> | |
132 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
133 | <mml:mi mathvariant="italic">c</mml:mi> | |
134 | </mml:msub> | |
135 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
136 | <mml:mi mathvariant="italic">c</mml:mi> | |
137 | </mml:msub> | |
138 | </mml:mfenced> | |
139 | </mml:math>. | |
140 | They are understood to have integer values between 0 and | |
141 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
142 | ||
143 | <mml:mfenced open="(" close=")"> | |
144 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
145 | <mml:mi mathvariant="italic">R</mml:mi> | |
146 | </mml:msub> | |
147 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
148 | <mml:mi mathvariant="italic">G</mml:mi> | |
149 | </mml:msub> | |
150 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
151 | <mml:mi mathvariant="italic">B</mml:mi> | |
152 | </mml:msub> | |
153 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
154 | <mml:mi mathvariant="italic">A</mml:mi> | |
155 | </mml:msub> | |
156 | </mml:mfenced> | |
157 | </mml:math>, | |
158 | where | |
159 | </p><p> | |
160 | </p><p> | |
161 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
162 | ||
163 | <mml:mrow> | |
164 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
165 | <mml:mi mathvariant="italic">c</mml:mi> | |
166 | </mml:msub> | |
167 | <mml:mo>=</mml:mo> | |
168 | <mml:mrow> | |
169 | <mml:msup><mml:mn>2</mml:mn> | |
170 | <mml:mfenced open="" close=""> | |
171 | <mml:msub><mml:mi mathvariant="italic">m</mml:mi> | |
172 | <mml:mi mathvariant="italic">c</mml:mi> | |
173 | </mml:msub> | |
174 | </mml:mfenced> | |
175 | </mml:msup> | |
176 | <mml:mo>-</mml:mo> | |
177 | <mml:mn>1</mml:mn> | |
178 | </mml:mrow> | |
179 | </mml:mrow> | |
180 | </mml:math> | |
181 | </p><p> | |
182 | </p><p> | |
183 | and | |
184 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
185 | ||
186 | <mml:mfenced open="(" close=")"> | |
187 | <mml:msub><mml:mi mathvariant="italic">m</mml:mi> | |
188 | <mml:mi mathvariant="italic">R</mml:mi> | |
189 | </mml:msub> | |
190 | <mml:msub><mml:mi mathvariant="italic">m</mml:mi> | |
191 | <mml:mi mathvariant="italic">G</mml:mi> | |
192 | </mml:msub> | |
193 | <mml:msub><mml:mi mathvariant="italic">m</mml:mi> | |
194 | <mml:mi mathvariant="italic">B</mml:mi> | |
195 | </mml:msub> | |
196 | <mml:msub><mml:mi mathvariant="italic">m</mml:mi> | |
197 | <mml:mi mathvariant="italic">A</mml:mi> | |
198 | </mml:msub> | |
199 | </mml:mfenced> | |
200 | </mml:math> | |
201 | is the number of red, | |
202 | green, | |
203 | blue, | |
204 | and alpha bitplanes. | |
205 | </p><p> | |
206 | Source and destination scale factors are referred to as | |
207 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
208 | ||
209 | <mml:mfenced open="(" close=")"> | |
210 | <mml:msub><mml:mi mathvariant="italic">s</mml:mi> | |
211 | <mml:mi mathvariant="italic">R</mml:mi> | |
212 | </mml:msub> | |
213 | <mml:msub><mml:mi mathvariant="italic">s</mml:mi> | |
214 | <mml:mi mathvariant="italic">G</mml:mi> | |
215 | </mml:msub> | |
216 | <mml:msub><mml:mi mathvariant="italic">s</mml:mi> | |
217 | <mml:mi mathvariant="italic">B</mml:mi> | |
218 | </mml:msub> | |
219 | <mml:msub><mml:mi mathvariant="italic">s</mml:mi> | |
220 | <mml:mi mathvariant="italic">A</mml:mi> | |
221 | </mml:msub> | |
222 | </mml:mfenced> | |
223 | </mml:math> | |
224 | and | |
225 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
226 | ||
227 | <mml:mfenced open="(" close=")"> | |
228 | <mml:msub><mml:mi mathvariant="italic">d</mml:mi> | |
229 | <mml:mi mathvariant="italic">R</mml:mi> | |
230 | </mml:msub> | |
231 | <mml:msub><mml:mi mathvariant="italic">d</mml:mi> | |
232 | <mml:mi mathvariant="italic">G</mml:mi> | |
233 | </mml:msub> | |
234 | <mml:msub><mml:mi mathvariant="italic">d</mml:mi> | |
235 | <mml:mi mathvariant="italic">B</mml:mi> | |
236 | </mml:msub> | |
237 | <mml:msub><mml:mi mathvariant="italic">d</mml:mi> | |
238 | <mml:mi mathvariant="italic">A</mml:mi> | |
239 | </mml:msub> | |
240 | </mml:mfenced> | |
241 | </mml:math>. | |
242 | The scale factors described in the table, | |
243 | denoted | |
244 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
245 | ||
246 | <mml:mfenced open="(" close=")"> | |
247 | <mml:msub><mml:mi mathvariant="italic">f</mml:mi> | |
248 | <mml:mi mathvariant="italic">R</mml:mi> | |
249 | </mml:msub> | |
250 | <mml:msub><mml:mi mathvariant="italic">f</mml:mi> | |
251 | <mml:mi mathvariant="italic">G</mml:mi> | |
252 | </mml:msub> | |
253 | <mml:msub><mml:mi mathvariant="italic">f</mml:mi> | |
254 | <mml:mi mathvariant="italic">B</mml:mi> | |
255 | </mml:msub> | |
256 | <mml:msub><mml:mi mathvariant="italic">f</mml:mi> | |
257 | <mml:mi mathvariant="italic">A</mml:mi> | |
258 | </mml:msub> | |
259 | </mml:mfenced> | |
260 | </mml:math>, | |
261 | represent either source or destination factors. | |
262 | All scale factors have range | |
263 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
264 | ||
265 | <mml:mfenced open="[" close="]"> | |
266 | <mml:mn>0</mml:mn> | |
267 | <mml:mn>1</mml:mn> | |
268 | </mml:mfenced> | |
269 | </mml:math>. | |
270 | </p><p> | |
271 | </p><div class="informaltable"><table border="1"><colgroup><col align="left" /><col align="left" /></colgroup><thead><tr><th align="left"><span class="bold"><strong> | |
272 | Parameter | |
273 | </strong></span></th><th align="left"><span class="bold"><strong> | |
274 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
275 | ||
276 | <mml:mfenced open="(" close=")"> | |
277 | <mml:msub><mml:mi mathvariant="italic">f</mml:mi> | |
278 | <mml:mi mathvariant="italic">R</mml:mi> | |
279 | </mml:msub> | |
280 | <mml:msub><mml:mi mathvariant="italic">f</mml:mi> | |
281 | <mml:mi mathvariant="italic">G</mml:mi> | |
282 | </mml:msub> | |
283 | <mml:msub><mml:mi mathvariant="italic">f</mml:mi> | |
284 | <mml:mi mathvariant="italic">B</mml:mi> | |
285 | </mml:msub> | |
286 | <mml:msub><mml:mi mathvariant="italic">f</mml:mi> | |
287 | <mml:mi mathvariant="italic">A</mml:mi> | |
288 | </mml:msub> | |
289 | </mml:mfenced> | |
290 | </mml:math> | |
291 | </strong></span></th></tr></thead><tbody><tr><td align="left"> | |
292 | <code class="constant">GL_ZERO</code> | |
293 | </td><td align="left"> | |
294 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
295 | ||
296 | <mml:mfenced open="(" close=")"> | |
297 | <mml:mn>0</mml:mn> | |
298 | <mml:mn>0</mml:mn> | |
299 | <mml:mn>0</mml:mn> | |
300 | <mml:mn>0</mml:mn> | |
301 | </mml:mfenced> | |
302 | </mml:math> | |
303 | </td></tr><tr><td align="left"> | |
304 | <code class="constant">GL_ONE</code> | |
305 | </td><td align="left"> | |
306 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
307 | ||
308 | <mml:mfenced open="(" close=")"> | |
309 | <mml:mn>1</mml:mn> | |
310 | <mml:mn>1</mml:mn> | |
311 | <mml:mn>1</mml:mn> | |
312 | <mml:mn>1</mml:mn> | |
313 | </mml:mfenced> | |
314 | </mml:math> | |
315 | </td></tr><tr><td align="left"> | |
316 | <code class="constant">GL_SRC_COLOR</code> | |
317 | </td><td align="left"> | |
318 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
319 | ||
320 | <mml:mfenced open="(" close=")"> | |
321 | <mml:mfrac> | |
322 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
323 | <mml:mi mathvariant="italic">s0</mml:mi> | |
324 | </mml:msub> | |
325 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
326 | <mml:mi mathvariant="italic">R</mml:mi> | |
327 | </mml:msub> | |
328 | </mml:mfrac> | |
329 | <mml:mfrac> | |
330 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
331 | <mml:mi mathvariant="italic">s0</mml:mi> | |
332 | </mml:msub> | |
333 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
334 | <mml:mi mathvariant="italic">G</mml:mi> | |
335 | </mml:msub> | |
336 | </mml:mfrac> | |
337 | <mml:mfrac> | |
338 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
339 | <mml:mi mathvariant="italic">s0</mml:mi> | |
340 | </mml:msub> | |
341 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
342 | <mml:mi mathvariant="italic">B</mml:mi> | |
343 | </mml:msub> | |
344 | </mml:mfrac> | |
345 | <mml:mfrac> | |
346 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
347 | <mml:mi mathvariant="italic">s0</mml:mi> | |
348 | </mml:msub> | |
349 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
350 | <mml:mi mathvariant="italic">A</mml:mi> | |
351 | </mml:msub> | |
352 | </mml:mfrac> | |
353 | </mml:mfenced> | |
354 | </mml:math> | |
355 | </td></tr><tr><td align="left"> | |
356 | <code class="constant">GL_ONE_MINUS_SRC_COLOR</code> | |
357 | </td><td align="left"> | |
358 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
359 | ||
360 | <mml:mrow> | |
361 | <mml:mfenced open="(" close=")"> | |
362 | <mml:mn>1</mml:mn> | |
363 | <mml:mn>1</mml:mn> | |
364 | <mml:mn>1</mml:mn> | |
365 | <mml:mn>1</mml:mn> | |
366 | </mml:mfenced> | |
367 | <mml:mo>-</mml:mo> | |
368 | <mml:mfenced open="(" close=")"> | |
369 | <mml:mfrac> | |
370 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
371 | <mml:mi mathvariant="italic">s0</mml:mi> | |
372 | </mml:msub> | |
373 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
374 | <mml:mi mathvariant="italic">R</mml:mi> | |
375 | </mml:msub> | |
376 | </mml:mfrac> | |
377 | <mml:mfrac> | |
378 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
379 | <mml:mi mathvariant="italic">s0</mml:mi> | |
380 | </mml:msub> | |
381 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
382 | <mml:mi mathvariant="italic">G</mml:mi> | |
383 | </mml:msub> | |
384 | </mml:mfrac> | |
385 | <mml:mfrac> | |
386 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
387 | <mml:mi mathvariant="italic">s0</mml:mi> | |
388 | </mml:msub> | |
389 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
390 | <mml:mi mathvariant="italic">B</mml:mi> | |
391 | </mml:msub> | |
392 | </mml:mfrac> | |
393 | <mml:mfrac> | |
394 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
395 | <mml:mi mathvariant="italic">s0</mml:mi> | |
396 | </mml:msub> | |
397 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
398 | <mml:mi mathvariant="italic">A</mml:mi> | |
399 | </mml:msub> | |
400 | </mml:mfrac> | |
401 | </mml:mfenced> | |
402 | </mml:mrow> | |
403 | </mml:math> | |
404 | </td></tr><tr><td align="left"> | |
405 | <code class="constant">GL_DST_COLOR</code> | |
406 | </td><td align="left"> | |
407 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
408 | ||
409 | <mml:mfenced open="(" close=")"> | |
410 | <mml:mfrac> | |
411 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
412 | <mml:mi mathvariant="italic">d</mml:mi> | |
413 | </mml:msub> | |
414 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
415 | <mml:mi mathvariant="italic">R</mml:mi> | |
416 | </mml:msub> | |
417 | </mml:mfrac> | |
418 | <mml:mfrac> | |
419 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
420 | <mml:mi mathvariant="italic">d</mml:mi> | |
421 | </mml:msub> | |
422 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
423 | <mml:mi mathvariant="italic">G</mml:mi> | |
424 | </mml:msub> | |
425 | </mml:mfrac> | |
426 | <mml:mfrac> | |
427 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
428 | <mml:mi mathvariant="italic">d</mml:mi> | |
429 | </mml:msub> | |
430 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
431 | <mml:mi mathvariant="italic">B</mml:mi> | |
432 | </mml:msub> | |
433 | </mml:mfrac> | |
434 | <mml:mfrac> | |
435 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
436 | <mml:mi mathvariant="italic">d</mml:mi> | |
437 | </mml:msub> | |
438 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
439 | <mml:mi mathvariant="italic">A</mml:mi> | |
440 | </mml:msub> | |
441 | </mml:mfrac> | |
442 | </mml:mfenced> | |
443 | </mml:math> | |
444 | </td></tr><tr><td align="left"> | |
445 | <code class="constant">GL_ONE_MINUS_DST_COLOR</code> | |
446 | </td><td align="left"> | |
447 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
448 | ||
449 | <mml:mrow> | |
450 | <mml:mfenced open="(" close=")"> | |
451 | <mml:mn>1</mml:mn> | |
452 | <mml:mn>1</mml:mn> | |
453 | <mml:mn>1</mml:mn> | |
454 | <mml:mn>1</mml:mn> | |
455 | </mml:mfenced> | |
456 | <mml:mo>-</mml:mo> | |
457 | <mml:mfenced open="(" close=")"> | |
458 | <mml:mfrac> | |
459 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
460 | <mml:mi mathvariant="italic">d</mml:mi> | |
461 | </mml:msub> | |
462 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
463 | <mml:mi mathvariant="italic">R</mml:mi> | |
464 | </mml:msub> | |
465 | </mml:mfrac> | |
466 | <mml:mfrac> | |
467 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
468 | <mml:mi mathvariant="italic">d</mml:mi> | |
469 | </mml:msub> | |
470 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
471 | <mml:mi mathvariant="italic">G</mml:mi> | |
472 | </mml:msub> | |
473 | </mml:mfrac> | |
474 | <mml:mfrac> | |
475 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
476 | <mml:mi mathvariant="italic">d</mml:mi> | |
477 | </mml:msub> | |
478 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
479 | <mml:mi mathvariant="italic">B</mml:mi> | |
480 | </mml:msub> | |
481 | </mml:mfrac> | |
482 | <mml:mfrac> | |
483 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
484 | <mml:mi mathvariant="italic">d</mml:mi> | |
485 | </mml:msub> | |
486 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
487 | <mml:mi mathvariant="italic">A</mml:mi> | |
488 | </mml:msub> | |
489 | </mml:mfrac> | |
490 | </mml:mfenced> | |
491 | </mml:mrow> | |
492 | </mml:math> | |
493 | </td></tr><tr><td align="left"> | |
494 | <code class="constant">GL_SRC_ALPHA</code> | |
495 | </td><td align="left"> | |
496 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
497 | ||
498 | <mml:mfenced open="(" close=")"> | |
499 | <mml:mfrac> | |
500 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
501 | <mml:mi mathvariant="italic">s0</mml:mi> | |
502 | </mml:msub> | |
503 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
504 | <mml:mi mathvariant="italic">A</mml:mi> | |
505 | </mml:msub> | |
506 | </mml:mfrac> | |
507 | <mml:mfrac> | |
508 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
509 | <mml:mi mathvariant="italic">s0</mml:mi> | |
510 | </mml:msub> | |
511 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
512 | <mml:mi mathvariant="italic">A</mml:mi> | |
513 | </mml:msub> | |
514 | </mml:mfrac> | |
515 | <mml:mfrac> | |
516 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
517 | <mml:mi mathvariant="italic">s0</mml:mi> | |
518 | </mml:msub> | |
519 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
520 | <mml:mi mathvariant="italic">A</mml:mi> | |
521 | </mml:msub> | |
522 | </mml:mfrac> | |
523 | <mml:mfrac> | |
524 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
525 | <mml:mi mathvariant="italic">s0</mml:mi> | |
526 | </mml:msub> | |
527 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
528 | <mml:mi mathvariant="italic">A</mml:mi> | |
529 | </mml:msub> | |
530 | </mml:mfrac> | |
531 | </mml:mfenced> | |
532 | </mml:math> | |
533 | </td></tr><tr><td align="left"> | |
534 | <code class="constant">GL_ONE_MINUS_SRC_ALPHA</code> | |
535 | </td><td align="left"> | |
536 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
537 | ||
538 | <mml:mrow> | |
539 | <mml:mfenced open="(" close=")"> | |
540 | <mml:mn>1</mml:mn> | |
541 | <mml:mn>1</mml:mn> | |
542 | <mml:mn>1</mml:mn> | |
543 | <mml:mn>1</mml:mn> | |
544 | </mml:mfenced> | |
545 | <mml:mo>-</mml:mo> | |
546 | <mml:mfenced open="(" close=")"> | |
547 | <mml:mfrac> | |
548 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
549 | <mml:mi mathvariant="italic">s0</mml:mi> | |
550 | </mml:msub> | |
551 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
552 | <mml:mi mathvariant="italic">A</mml:mi> | |
553 | </mml:msub> | |
554 | </mml:mfrac> | |
555 | <mml:mfrac> | |
556 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
557 | <mml:mi mathvariant="italic">s0</mml:mi> | |
558 | </mml:msub> | |
559 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
560 | <mml:mi mathvariant="italic">A</mml:mi> | |
561 | </mml:msub> | |
562 | </mml:mfrac> | |
563 | <mml:mfrac> | |
564 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
565 | <mml:mi mathvariant="italic">s0</mml:mi> | |
566 | </mml:msub> | |
567 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
568 | <mml:mi mathvariant="italic">A</mml:mi> | |
569 | </mml:msub> | |
570 | </mml:mfrac> | |
571 | <mml:mfrac> | |
572 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
573 | <mml:mi mathvariant="italic">s0</mml:mi> | |
574 | </mml:msub> | |
575 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
576 | <mml:mi mathvariant="italic">A</mml:mi> | |
577 | </mml:msub> | |
578 | </mml:mfrac> | |
579 | </mml:mfenced> | |
580 | </mml:mrow> | |
581 | </mml:math> | |
582 | </td></tr><tr><td align="left"> | |
583 | <code class="constant">GL_DST_ALPHA</code> | |
584 | </td><td align="left"> | |
585 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
586 | ||
587 | <mml:mfenced open="(" close=")"> | |
588 | <mml:mfrac> | |
589 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
590 | <mml:mi mathvariant="italic">d</mml:mi> | |
591 | </mml:msub> | |
592 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
593 | <mml:mi mathvariant="italic">A</mml:mi> | |
594 | </mml:msub> | |
595 | </mml:mfrac> | |
596 | <mml:mfrac> | |
597 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
598 | <mml:mi mathvariant="italic">d</mml:mi> | |
599 | </mml:msub> | |
600 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
601 | <mml:mi mathvariant="italic">A</mml:mi> | |
602 | </mml:msub> | |
603 | </mml:mfrac> | |
604 | <mml:mfrac> | |
605 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
606 | <mml:mi mathvariant="italic">d</mml:mi> | |
607 | </mml:msub> | |
608 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
609 | <mml:mi mathvariant="italic">A</mml:mi> | |
610 | </mml:msub> | |
611 | </mml:mfrac> | |
612 | <mml:mfrac> | |
613 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
614 | <mml:mi mathvariant="italic">d</mml:mi> | |
615 | </mml:msub> | |
616 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
617 | <mml:mi mathvariant="italic">A</mml:mi> | |
618 | </mml:msub> | |
619 | </mml:mfrac> | |
620 | </mml:mfenced> | |
621 | </mml:math> | |
622 | </td></tr><tr><td align="left"> | |
623 | <code class="constant">GL_ONE_MINUS_DST_ALPHA</code> | |
624 | </td><td align="left"> | |
625 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
626 | ||
627 | <mml:mrow> | |
628 | <mml:mfenced open="(" close=")"> | |
629 | <mml:mn>1</mml:mn> | |
630 | <mml:mn>1</mml:mn> | |
631 | <mml:mn>1</mml:mn> | |
632 | <mml:mn>1</mml:mn> | |
633 | </mml:mfenced> | |
634 | <mml:mo>-</mml:mo> | |
635 | <mml:mfenced open="(" close=")"> | |
636 | <mml:mfrac> | |
637 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
638 | <mml:mi mathvariant="italic">d</mml:mi> | |
639 | </mml:msub> | |
640 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
641 | <mml:mi mathvariant="italic">A</mml:mi> | |
642 | </mml:msub> | |
643 | </mml:mfrac> | |
644 | <mml:mfrac> | |
645 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
646 | <mml:mi mathvariant="italic">d</mml:mi> | |
647 | </mml:msub> | |
648 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
649 | <mml:mi mathvariant="italic">A</mml:mi> | |
650 | </mml:msub> | |
651 | </mml:mfrac> | |
652 | <mml:mfrac> | |
653 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
654 | <mml:mi mathvariant="italic">d</mml:mi> | |
655 | </mml:msub> | |
656 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
657 | <mml:mi mathvariant="italic">A</mml:mi> | |
658 | </mml:msub> | |
659 | </mml:mfrac> | |
660 | <mml:mfrac> | |
661 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
662 | <mml:mi mathvariant="italic">d</mml:mi> | |
663 | </mml:msub> | |
664 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
665 | <mml:mi mathvariant="italic">A</mml:mi> | |
666 | </mml:msub> | |
667 | </mml:mfrac> | |
668 | </mml:mfenced> | |
669 | </mml:mrow> | |
670 | </mml:math> | |
671 | </td></tr><tr><td align="left"> | |
672 | <code class="constant">GL_CONSTANT_COLOR</code> | |
673 | </td><td align="left"> | |
674 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
675 | ||
676 | <mml:mfenced open="(" close=")"> | |
677 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
678 | <mml:mi mathvariant="italic">c</mml:mi> | |
679 | </mml:msub> | |
680 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
681 | <mml:mi mathvariant="italic">c</mml:mi> | |
682 | </mml:msub> | |
683 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
684 | <mml:mi mathvariant="italic">c</mml:mi> | |
685 | </mml:msub> | |
686 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
687 | <mml:mi mathvariant="italic">c</mml:mi> | |
688 | </mml:msub> | |
689 | </mml:mfenced> | |
690 | </mml:math> | |
691 | </td></tr><tr><td align="left"> | |
692 | <code class="constant">GL_ONE_MINUS_CONSTANT_COLOR</code> | |
693 | </td><td align="left"> | |
694 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
695 | ||
696 | <mml:mrow> | |
697 | <mml:mfenced open="(" close=")"> | |
698 | <mml:mn>1</mml:mn> | |
699 | <mml:mn>1</mml:mn> | |
700 | <mml:mn>1</mml:mn> | |
701 | <mml:mn>1</mml:mn> | |
702 | </mml:mfenced> | |
703 | <mml:mo>-</mml:mo> | |
704 | <mml:mfenced open="(" close=")"> | |
705 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
706 | <mml:mi mathvariant="italic">c</mml:mi> | |
707 | </mml:msub> | |
708 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
709 | <mml:mi mathvariant="italic">c</mml:mi> | |
710 | </mml:msub> | |
711 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
712 | <mml:mi mathvariant="italic">c</mml:mi> | |
713 | </mml:msub> | |
714 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
715 | <mml:mi mathvariant="italic">c</mml:mi> | |
716 | </mml:msub> | |
717 | </mml:mfenced> | |
718 | </mml:mrow> | |
719 | </mml:math> | |
720 | </td></tr><tr><td align="left"> | |
721 | <code class="constant">GL_CONSTANT_ALPHA</code> | |
722 | </td><td align="left"> | |
723 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
724 | ||
725 | <mml:mfenced open="(" close=")"> | |
726 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
727 | <mml:mi mathvariant="italic">c</mml:mi> | |
728 | </mml:msub> | |
729 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
730 | <mml:mi mathvariant="italic">c</mml:mi> | |
731 | </mml:msub> | |
732 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
733 | <mml:mi mathvariant="italic">c</mml:mi> | |
734 | </mml:msub> | |
735 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
736 | <mml:mi mathvariant="italic">c</mml:mi> | |
737 | </mml:msub> | |
738 | </mml:mfenced> | |
739 | </mml:math> | |
740 | </td></tr><tr><td align="left"> | |
741 | <code class="constant">GL_ONE_MINUS_CONSTANT_ALPHA</code> | |
742 | </td><td align="left"> | |
743 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
744 | ||
745 | <mml:mrow> | |
746 | <mml:mfenced open="(" close=")"> | |
747 | <mml:mn>1</mml:mn> | |
748 | <mml:mn>1</mml:mn> | |
749 | <mml:mn>1</mml:mn> | |
750 | <mml:mn>1</mml:mn> | |
751 | </mml:mfenced> | |
752 | <mml:mo>-</mml:mo> | |
753 | <mml:mfenced open="(" close=")"> | |
754 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
755 | <mml:mi mathvariant="italic">c</mml:mi> | |
756 | </mml:msub> | |
757 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
758 | <mml:mi mathvariant="italic">c</mml:mi> | |
759 | </mml:msub> | |
760 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
761 | <mml:mi mathvariant="italic">c</mml:mi> | |
762 | </mml:msub> | |
763 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
764 | <mml:mi mathvariant="italic">c</mml:mi> | |
765 | </mml:msub> | |
766 | </mml:mfenced> | |
767 | </mml:mrow> | |
768 | </mml:math> | |
769 | </td></tr><tr><td align="left"> | |
770 | <code class="constant">GL_SRC_ALPHA_SATURATE</code> | |
771 | </td><td align="left"> | |
772 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
773 | ||
774 | <mml:mfenced open="(" close=")"> | |
775 | <mml:mi mathvariant="italic">i</mml:mi> | |
776 | <mml:mi mathvariant="italic">i</mml:mi> | |
777 | <mml:mi mathvariant="italic">i</mml:mi> | |
778 | <mml:mn>1</mml:mn> | |
779 | </mml:mfenced> | |
780 | </mml:math> | |
781 | </td></tr><tr><td align="left"> | |
782 | <code class="constant">GL_SRC1_COLOR</code> | |
783 | </td><td align="left"> | |
784 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
785 | ||
786 | <mml:mfenced open="(" close=")"> | |
787 | <mml:mfrac> | |
788 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
789 | <mml:mi mathvariant="italic">s1</mml:mi> | |
790 | </mml:msub> | |
791 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
792 | <mml:mi mathvariant="italic">R</mml:mi> | |
793 | </mml:msub> | |
794 | </mml:mfrac> | |
795 | <mml:mfrac> | |
796 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
797 | <mml:mi mathvariant="italic">s1</mml:mi> | |
798 | </mml:msub> | |
799 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
800 | <mml:mi mathvariant="italic">G</mml:mi> | |
801 | </mml:msub> | |
802 | </mml:mfrac> | |
803 | <mml:mfrac> | |
804 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
805 | <mml:mi mathvariant="italic">s1</mml:mi> | |
806 | </mml:msub> | |
807 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
808 | <mml:mi mathvariant="italic">B</mml:mi> | |
809 | </mml:msub> | |
810 | </mml:mfrac> | |
811 | <mml:mfrac> | |
812 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
813 | <mml:mi mathvariant="italic">s1</mml:mi> | |
814 | </mml:msub> | |
815 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
816 | <mml:mi mathvariant="italic">A</mml:mi> | |
817 | </mml:msub> | |
818 | </mml:mfrac> | |
819 | </mml:mfenced> | |
820 | </mml:math> | |
821 | </td></tr><tr><td align="left"> | |
822 | <code class="constant">GL_ONE_MINUS_SRC1_COLOR</code> | |
823 | </td><td align="left"> | |
824 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
825 | ||
826 | <mml:mrow> | |
827 | <mml:mfenced open="(" close=")"> | |
828 | <mml:mn>1</mml:mn> | |
829 | <mml:mn>1</mml:mn> | |
830 | <mml:mn>1</mml:mn> | |
831 | <mml:mn>1</mml:mn> | |
832 | </mml:mfenced> | |
833 | <mml:mo>-</mml:mo> | |
834 | <mml:mfenced open="(" close=")"> | |
835 | <mml:mfrac> | |
836 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
837 | <mml:mi mathvariant="italic">s1</mml:mi> | |
838 | </mml:msub> | |
839 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
840 | <mml:mi mathvariant="italic">R</mml:mi> | |
841 | </mml:msub> | |
842 | </mml:mfrac> | |
843 | <mml:mfrac> | |
844 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
845 | <mml:mi mathvariant="italic">s1</mml:mi> | |
846 | </mml:msub> | |
847 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
848 | <mml:mi mathvariant="italic">G</mml:mi> | |
849 | </mml:msub> | |
850 | </mml:mfrac> | |
851 | <mml:mfrac> | |
852 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
853 | <mml:mi mathvariant="italic">s1</mml:mi> | |
854 | </mml:msub> | |
855 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
856 | <mml:mi mathvariant="italic">B</mml:mi> | |
857 | </mml:msub> | |
858 | </mml:mfrac> | |
859 | <mml:mfrac> | |
860 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
861 | <mml:mi mathvariant="italic">s1</mml:mi> | |
862 | </mml:msub> | |
863 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
864 | <mml:mi mathvariant="italic">A</mml:mi> | |
865 | </mml:msub> | |
866 | </mml:mfrac> | |
867 | </mml:mfenced> | |
868 | </mml:mrow> | |
869 | </mml:math> | |
870 | </td></tr><tr><td align="left"> | |
871 | <code class="constant">GL_SRC1_ALPHA</code> | |
872 | </td><td align="left"> | |
873 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
874 | ||
875 | <mml:mfenced open="(" close=")"> | |
876 | <mml:mfrac> | |
877 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
878 | <mml:mi mathvariant="italic">s1</mml:mi> | |
879 | </mml:msub> | |
880 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
881 | <mml:mi mathvariant="italic">A</mml:mi> | |
882 | </mml:msub> | |
883 | </mml:mfrac> | |
884 | <mml:mfrac> | |
885 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
886 | <mml:mi mathvariant="italic">s1</mml:mi> | |
887 | </mml:msub> | |
888 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
889 | <mml:mi mathvariant="italic">A</mml:mi> | |
890 | </mml:msub> | |
891 | </mml:mfrac> | |
892 | <mml:mfrac> | |
893 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
894 | <mml:mi mathvariant="italic">s1</mml:mi> | |
895 | </mml:msub> | |
896 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
897 | <mml:mi mathvariant="italic">A</mml:mi> | |
898 | </mml:msub> | |
899 | </mml:mfrac> | |
900 | <mml:mfrac> | |
901 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
902 | <mml:mi mathvariant="italic">s1</mml:mi> | |
903 | </mml:msub> | |
904 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
905 | <mml:mi mathvariant="italic">A</mml:mi> | |
906 | </mml:msub> | |
907 | </mml:mfrac> | |
908 | </mml:mfenced> | |
909 | </mml:math> | |
910 | </td></tr><tr><td align="left"> | |
911 | <code class="constant">GL_ONE_MINUS_SRC1_ALPHA</code> | |
912 | </td><td align="left"> | |
913 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
914 | ||
915 | <mml:mrow> | |
916 | <mml:mfenced open="(" close=")"> | |
917 | <mml:mn>1</mml:mn> | |
918 | <mml:mn>1</mml:mn> | |
919 | <mml:mn>1</mml:mn> | |
920 | <mml:mn>1</mml:mn> | |
921 | </mml:mfenced> | |
922 | <mml:mo>-</mml:mo> | |
923 | <mml:mfenced open="(" close=")"> | |
924 | <mml:mfrac> | |
925 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
926 | <mml:mi mathvariant="italic">s1</mml:mi> | |
927 | </mml:msub> | |
928 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
929 | <mml:mi mathvariant="italic">A</mml:mi> | |
930 | </mml:msub> | |
931 | </mml:mfrac> | |
932 | <mml:mfrac> | |
933 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
934 | <mml:mi mathvariant="italic">s1</mml:mi> | |
935 | </mml:msub> | |
936 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
937 | <mml:mi mathvariant="italic">A</mml:mi> | |
938 | </mml:msub> | |
939 | </mml:mfrac> | |
940 | <mml:mfrac> | |
941 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
942 | <mml:mi mathvariant="italic">s1</mml:mi> | |
943 | </mml:msub> | |
944 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
945 | <mml:mi mathvariant="italic">A</mml:mi> | |
946 | </mml:msub> | |
947 | </mml:mfrac> | |
948 | <mml:mfrac> | |
949 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
950 | <mml:mi mathvariant="italic">s1</mml:mi> | |
951 | </mml:msub> | |
952 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
953 | <mml:mi mathvariant="italic">A</mml:mi> | |
954 | </mml:msub> | |
955 | </mml:mfrac> | |
956 | </mml:mfenced> | |
957 | </mml:mrow> | |
958 | </mml:math> | |
959 | </td></tr></tbody></table></div><p> | |
960 | In the table, | |
961 | </p><p> | |
962 | </p><p> | |
963 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
964 | ||
965 | <mml:mrow> | |
966 | <mml:mi mathvariant="italic">i</mml:mi> | |
967 | <mml:mo>=</mml:mo> | |
968 | <mml:mfrac> | |
969 | <mml:mrow> | |
970 | <mml:mi mathvariant="italic">min</mml:mi> | |
971 | <mml:mo></mml:mo> | |
972 | <mml:mfenced open="(" close=")"> | |
973 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
974 | <mml:mi mathvariant="italic">s</mml:mi> | |
975 | </mml:msub> | |
976 | <mml:mrow> | |
977 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
978 | <mml:mi mathvariant="italic">A</mml:mi> | |
979 | </mml:msub> | |
980 | <mml:mo>-</mml:mo> | |
981 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
982 | <mml:mi mathvariant="italic">d</mml:mi> | |
983 | </mml:msub> | |
984 | </mml:mrow> | |
985 | </mml:mfenced> | |
986 | </mml:mrow> | |
987 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
988 | <mml:mi mathvariant="italic">A</mml:mi> | |
989 | </mml:msub> | |
990 | </mml:mfrac> | |
991 | </mml:mrow> | |
992 | </mml:math> | |
993 | </p><p> | |
994 | </p><p> | |
995 | To determine the blended RGBA values of a pixel, | |
996 | the system uses the following equations: | |
997 | </p><p> | |
998 | </p><p> | |
999 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1000 | ||
1001 | <mml:mrow> | |
1002 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
1003 | <mml:mi mathvariant="italic">d</mml:mi> | |
1004 | </mml:msub> | |
1005 | <mml:mo>=</mml:mo> | |
1006 | <mml:mrow> | |
1007 | <mml:mi mathvariant="italic">min</mml:mi> | |
1008 | <mml:mo></mml:mo> | |
1009 | <mml:mfenced open="(" close=")"> | |
1010 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
1011 | <mml:mi mathvariant="italic">R</mml:mi> | |
1012 | </mml:msub> | |
1013 | <mml:mrow> | |
1014 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
1015 | <mml:mi mathvariant="italic">s</mml:mi> | |
1016 | </mml:msub> | |
1017 | <mml:mo></mml:mo> | |
1018 | <mml:msub><mml:mi mathvariant="italic">s</mml:mi> | |
1019 | <mml:mi mathvariant="italic">R</mml:mi> | |
1020 | </mml:msub> | |
1021 | <mml:mo>+</mml:mo> | |
1022 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
1023 | <mml:mi mathvariant="italic">d</mml:mi> | |
1024 | </mml:msub> | |
1025 | <mml:mo></mml:mo> | |
1026 | <mml:msub><mml:mi mathvariant="italic">d</mml:mi> | |
1027 | <mml:mi mathvariant="italic">R</mml:mi> | |
1028 | </mml:msub> | |
1029 | </mml:mrow> | |
1030 | </mml:mfenced> | |
1031 | </mml:mrow> | |
1032 | </mml:mrow> | |
1033 | </mml:math> | |
1034 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1035 | ||
1036 | <mml:mrow> | |
1037 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
1038 | <mml:mi mathvariant="italic">d</mml:mi> | |
1039 | </mml:msub> | |
1040 | <mml:mo>=</mml:mo> | |
1041 | <mml:mrow> | |
1042 | <mml:mi mathvariant="italic">min</mml:mi> | |
1043 | <mml:mo></mml:mo> | |
1044 | <mml:mfenced open="(" close=")"> | |
1045 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
1046 | <mml:mi mathvariant="italic">G</mml:mi> | |
1047 | </mml:msub> | |
1048 | <mml:mrow> | |
1049 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
1050 | <mml:mi mathvariant="italic">s</mml:mi> | |
1051 | </mml:msub> | |
1052 | <mml:mo></mml:mo> | |
1053 | <mml:msub><mml:mi mathvariant="italic">s</mml:mi> | |
1054 | <mml:mi mathvariant="italic">G</mml:mi> | |
1055 | </mml:msub> | |
1056 | <mml:mo>+</mml:mo> | |
1057 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
1058 | <mml:mi mathvariant="italic">d</mml:mi> | |
1059 | </mml:msub> | |
1060 | <mml:mo></mml:mo> | |
1061 | <mml:msub><mml:mi mathvariant="italic">d</mml:mi> | |
1062 | <mml:mi mathvariant="italic">G</mml:mi> | |
1063 | </mml:msub> | |
1064 | </mml:mrow> | |
1065 | </mml:mfenced> | |
1066 | </mml:mrow> | |
1067 | </mml:mrow> | |
1068 | </mml:math> | |
1069 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1070 | ||
1071 | <mml:mrow> | |
1072 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
1073 | <mml:mi mathvariant="italic">d</mml:mi> | |
1074 | </mml:msub> | |
1075 | <mml:mo>=</mml:mo> | |
1076 | <mml:mrow> | |
1077 | <mml:mi mathvariant="italic">min</mml:mi> | |
1078 | <mml:mo></mml:mo> | |
1079 | <mml:mfenced open="(" close=")"> | |
1080 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
1081 | <mml:mi mathvariant="italic">B</mml:mi> | |
1082 | </mml:msub> | |
1083 | <mml:mrow> | |
1084 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
1085 | <mml:mi mathvariant="italic">s</mml:mi> | |
1086 | </mml:msub> | |
1087 | <mml:mo></mml:mo> | |
1088 | <mml:msub><mml:mi mathvariant="italic">s</mml:mi> | |
1089 | <mml:mi mathvariant="italic">B</mml:mi> | |
1090 | </mml:msub> | |
1091 | <mml:mo>+</mml:mo> | |
1092 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
1093 | <mml:mi mathvariant="italic">d</mml:mi> | |
1094 | </mml:msub> | |
1095 | <mml:mo></mml:mo> | |
1096 | <mml:msub><mml:mi mathvariant="italic">d</mml:mi> | |
1097 | <mml:mi mathvariant="italic">B</mml:mi> | |
1098 | </mml:msub> | |
1099 | </mml:mrow> | |
1100 | </mml:mfenced> | |
1101 | </mml:mrow> | |
1102 | </mml:mrow> | |
1103 | </mml:math> | |
1104 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1105 | ||
1106 | <mml:mrow> | |
1107 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
1108 | <mml:mi mathvariant="italic">d</mml:mi> | |
1109 | </mml:msub> | |
1110 | <mml:mo>=</mml:mo> | |
1111 | <mml:mrow> | |
1112 | <mml:mi mathvariant="italic">min</mml:mi> | |
1113 | <mml:mo></mml:mo> | |
1114 | <mml:mfenced open="(" close=")"> | |
1115 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
1116 | <mml:mi mathvariant="italic">A</mml:mi> | |
1117 | </mml:msub> | |
1118 | <mml:mrow> | |
1119 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
1120 | <mml:mi mathvariant="italic">s</mml:mi> | |
1121 | </mml:msub> | |
1122 | <mml:mo></mml:mo> | |
1123 | <mml:msub><mml:mi mathvariant="italic">s</mml:mi> | |
1124 | <mml:mi mathvariant="italic">A</mml:mi> | |
1125 | </mml:msub> | |
1126 | <mml:mo>+</mml:mo> | |
1127 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
1128 | <mml:mi mathvariant="italic">d</mml:mi> | |
1129 | </mml:msub> | |
1130 | <mml:mo></mml:mo> | |
1131 | <mml:msub><mml:mi mathvariant="italic">d</mml:mi> | |
1132 | <mml:mi mathvariant="italic">A</mml:mi> | |
1133 | </mml:msub> | |
1134 | </mml:mrow> | |
1135 | </mml:mfenced> | |
1136 | </mml:mrow> | |
1137 | </mml:mrow> | |
1138 | </mml:math> | |
1139 | </p><p> | |
1140 | </p><p> | |
1141 | Despite the apparent precision of the above equations, | |
1142 | blending arithmetic is not exactly specified, | |
1143 | because blending operates with imprecise integer color values. | |
1144 | However, | |
1145 | a blend factor that should be equal to 1 | |
1146 | is guaranteed not to modify its multiplicand, | |
1147 | and a blend factor equal to 0 reduces its multiplicand to 0. | |
1148 | For example, | |
1149 | when <em class="parameter"><code>sfactor</code></em> is <code class="constant">GL_SRC_ALPHA</code>, | |
1150 | <em class="parameter"><code>dfactor</code></em> is <code class="constant">GL_ONE_MINUS_SRC_ALPHA</code>, | |
1151 | and | |
1152 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1153 | ||
1154 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
1155 | <mml:mi mathvariant="italic">s</mml:mi> | |
1156 | </mml:msub> | |
1157 | </mml:math> | |
1158 | is equal to | |
1159 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1160 | ||
1161 | <mml:msub><mml:mi mathvariant="italic">k</mml:mi> | |
1162 | <mml:mi mathvariant="italic">A</mml:mi> | |
1163 | </mml:msub> | |
1164 | </mml:math>, | |
1165 | the equations reduce to simple replacement: | |
1166 | </p><p> | |
1167 | </p><p> | |
1168 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1169 | ||
1170 | <mml:mrow> | |
1171 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
1172 | <mml:mi mathvariant="italic">d</mml:mi> | |
1173 | </mml:msub> | |
1174 | <mml:mo>=</mml:mo> | |
1175 | <mml:msub><mml:mi mathvariant="italic">R</mml:mi> | |
1176 | <mml:mi mathvariant="italic">s</mml:mi> | |
1177 | </mml:msub> | |
1178 | </mml:mrow> | |
1179 | </mml:math> | |
1180 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1181 | ||
1182 | <mml:mrow> | |
1183 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
1184 | <mml:mi mathvariant="italic">d</mml:mi> | |
1185 | </mml:msub> | |
1186 | <mml:mo>=</mml:mo> | |
1187 | <mml:msub><mml:mi mathvariant="italic">G</mml:mi> | |
1188 | <mml:mi mathvariant="italic">s</mml:mi> | |
1189 | </mml:msub> | |
1190 | </mml:mrow> | |
1191 | </mml:math> | |
1192 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1193 | ||
1194 | <mml:mrow> | |
1195 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
1196 | <mml:mi mathvariant="italic">d</mml:mi> | |
1197 | </mml:msub> | |
1198 | <mml:mo>=</mml:mo> | |
1199 | <mml:msub><mml:mi mathvariant="italic">B</mml:mi> | |
1200 | <mml:mi mathvariant="italic">s</mml:mi> | |
1201 | </mml:msub> | |
1202 | </mml:mrow> | |
1203 | </mml:math> | |
1204 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1205 | ||
1206 | <mml:mrow> | |
1207 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
1208 | <mml:mi mathvariant="italic">d</mml:mi> | |
1209 | </mml:msub> | |
1210 | <mml:mo>=</mml:mo> | |
1211 | <mml:msub><mml:mi mathvariant="italic">A</mml:mi> | |
1212 | <mml:mi mathvariant="italic">s</mml:mi> | |
1213 | </mml:msub> | |
1214 | </mml:mrow> | |
1215 | </mml:math> | |
1216 | </p><p> | |
1217 | </p><p> | |
1218 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="examples"></a><h2>Examples</h2><p> | |
1219 | </p><p> | |
1220 | Transparency is best implemented using blend function | |
1221 | (<code class="constant">GL_SRC_ALPHA</code>, <code class="constant">GL_ONE_MINUS_SRC_ALPHA</code>) | |
1222 | with primitives sorted from farthest to nearest. | |
1223 | Note that this transparency calculation does not require | |
1224 | the presence of alpha bitplanes in the frame buffer. | |
1225 | </p><p> | |
1226 | Blend function | |
1227 | (<code class="constant">GL_SRC_ALPHA</code>, <code class="constant">GL_ONE_MINUS_SRC_ALPHA</code>) | |
1228 | is also useful for rendering antialiased points and lines | |
1229 | in arbitrary order. | |
1230 | </p><p> | |
1231 | Polygon antialiasing is optimized using blend function | |
1232 | (<code class="constant">GL_SRC_ALPHA_SATURATE</code>, <code class="constant">GL_ONE</code>) | |
1233 | with polygons sorted from nearest to farthest. | |
1234 | (See the <a href="glEnable.xml"><span class="citerefentry"><span class="refentrytitle">glEnable</span></span></a>, <a href="glDisable.xml"><span class="citerefentry"><span class="refentrytitle">glDisable</span></span></a> reference page and the | |
1235 | <code class="constant">GL_POLYGON_SMOOTH</code> argument for information on polygon antialiasing.) | |
1236 | Destination alpha bitplanes, | |
1237 | which must be present for this blend function to operate correctly, | |
1238 | store the accumulated coverage. | |
1239 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p> | |
1240 | Incoming (source) alpha is correctly thought of as a material opacity, | |
1241 | ranging from 1.0 | |
1242 | (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
1243 | ||
1244 | <mml:msub><mml:mi mathvariant="italic">K</mml:mi> | |
1245 | <mml:mi mathvariant="italic">A</mml:mi> | |
1246 | </mml:msub> | |
1247 | </mml:math>), | |
1248 | representing complete opacity, | |
1249 | to 0.0 (0), representing complete | |
1250 | transparency. | |
1251 | </p><p> | |
1252 | When more than one color buffer is enabled for drawing, | |
1253 | the GL performs blending separately for each enabled buffer, | |
1254 | using the contents of that buffer for destination color. | |
1255 | (See <a href="glDrawBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glDrawBuffer</span></span></a>.) | |
1256 | </p><p> | |
1257 | When dual source blending is enabled (i.e., one of the blend factors requiring | |
1258 | the second color input is used), the maximum number of enabled draw buffers | |
1259 | is given by <code class="constant">GL_MAX_DUAL_SOURCE_DRAW_BUFFERS</code>, which may | |
1260 | be lower than <code class="constant">GL_MAX_DRAW_BUFFERS</code>. | |
1261 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> | |
1262 | <code class="constant">GL_INVALID_ENUM</code> is generated if either <em class="parameter"><code>sfactor</code></em> | |
1263 | or <em class="parameter"><code>dfactor</code></em> is not an accepted value. | |
1264 | </p><p> | |
1265 | <code class="constant">GL_INVALID_VALUE</code> is generated by <code class="function">glBlendFunci</code> if <em class="parameter"><code>buf</code></em> is greater | |
1266 | than or equal to the value of <code class="constant">GL_MAX_DRAW_BUFFERS</code>. | |
1267 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p> | |
f37e7e3d | 1268 | <a href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_BLEND_SRC</code> |
7faf1d71 | 1269 | </p><p> |
f37e7e3d | 1270 | <a href="glGet.xml"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a> with argument <code class="constant">GL_BLEND_DST</code> |
7faf1d71 AW |
1271 | </p><p> |
1272 | <a href="glIsEnabled.xml"><span class="citerefentry"><span class="refentrytitle">glIsEnabled</span></span></a> with argument <code class="constant">GL_BLEND</code> | |
1273 | </p><p> | |
1274 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
1275 | <a href="glBlendColor.xml"><span class="citerefentry"><span class="refentrytitle">glBlendColor</span></span></a>, | |
1276 | <a href="glBlendEquation.xml"><span class="citerefentry"><span class="refentrytitle">glBlendEquation</span></span></a>, | |
1277 | <a href="glBlendFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFuncSeparate</span></span></a>, | |
1278 | <a href="glClear.xml"><span class="citerefentry"><span class="refentrytitle">glClear</span></span></a>, | |
1279 | <a href="glDrawBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glDrawBuffer</span></span></a>, | |
1280 | <a href="glEnable.xml"><span class="citerefentry"><span class="refentrytitle">glEnable</span></span></a>, | |
1281 | <a href="glLogicOp.xml"><span class="citerefentry"><span class="refentrytitle">glLogicOp</span></span></a>, | |
1282 | <a href="glStencilFunc.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFunc</span></span></a> | |
1283 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
1284 | Copyright <span class="trademark"></span>© 1991-2006 | |
1285 | Silicon Graphics, Inc. This document is licensed under the SGI | |
1286 | Free Software B License. For details, see | |
1287 | <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>. | |
1288 | </p></div></div></body></html> |