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comparison mupdf-source/thirdparty/freeglut/src/fg_gl2.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * fg_gl2.c
3 *
4 * Load OpenGL (ES) 2.0 functions used by fg_geometry
5 *
6 * Copyright (C) 2012 Sylvain Beucler
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
22 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 #include <GL/freeglut.h>
27 #include "fg_internal.h"
28 #include "fg_gl2.h"
29
30 #ifndef GL_ES_VERSION_2_0
31 /* GLES2 has the corresponding entry points built-in, and these fgh-prefixed
32 * names are defined in fg_gl2.h header to reference them, for any other case,
33 * define them as function pointers here.
34 */
35 FGH_PFNGLGENBUFFERSPROC fghGenBuffers;
36 FGH_PFNGLDELETEBUFFERSPROC fghDeleteBuffers;
37 FGH_PFNGLBINDBUFFERPROC fghBindBuffer;
38 FGH_PFNGLBUFFERDATAPROC fghBufferData;
39 FGH_PFNGLENABLEVERTEXATTRIBARRAYPROC fghEnableVertexAttribArray;
40 FGH_PFNGLDISABLEVERTEXATTRIBARRAYPROC fghDisableVertexAttribArray;
41 FGH_PFNGLVERTEXATTRIBPOINTERPROC fghVertexAttribPointer;
42 #endif
43
44 void FGAPIENTRY glutSetVertexAttribCoord3(GLint attrib) {
45 if (fgStructure.CurrentWindow != NULL)
46 fgStructure.CurrentWindow->Window.attribute_v_coord = attrib;
47 }
48
49 void FGAPIENTRY glutSetVertexAttribNormal(GLint attrib) {
50 if (fgStructure.CurrentWindow != NULL)
51 fgStructure.CurrentWindow->Window.attribute_v_normal = attrib;
52 }
53
54 void FGAPIENTRY glutSetVertexAttribTexCoord2(GLint attrib) {
55 if (fgStructure.CurrentWindow != NULL)
56 fgStructure.CurrentWindow->Window.attribute_v_texture = attrib;
57 }
58
59 void fgInitGL2() {
60 #ifdef GL_ES_VERSION_2_0
61 fgState.HasOpenGL20 = (fgState.MajorVersion >= 2);
62 #else
63 /* TODO: Mesa returns a valid stub function, rather than NULL,
64 when we request a non-existent function */
65 #define CHECK(func, a) if ((a) == NULL) { fgWarning("fgInitGL2: " func " is NULL"); return; }
66 CHECK("fghGenBuffers", fghGenBuffers = (FGH_PFNGLGENBUFFERSPROC)glutGetProcAddress("glGenBuffers"));
67 CHECK("fghDeleteBuffers", fghDeleteBuffers = (FGH_PFNGLDELETEBUFFERSPROC)glutGetProcAddress("glDeleteBuffers"));
68 CHECK("fghBindBuffer", fghBindBuffer = (FGH_PFNGLBINDBUFFERPROC)glutGetProcAddress("glBindBuffer"));
69 CHECK("fghBufferData", fghBufferData = (FGH_PFNGLBUFFERDATAPROC)glutGetProcAddress("glBufferData"));
70 CHECK("fghVertexAttribPointer", fghVertexAttribPointer = (FGH_PFNGLVERTEXATTRIBPOINTERPROC)glutGetProcAddress("glVertexAttribPointer"));
71 CHECK("fghEnableVertexAttribArray", fghEnableVertexAttribArray = (FGH_PFNGLENABLEVERTEXATTRIBARRAYPROC)glutGetProcAddress("glEnableVertexAttribArray"));
72 CHECK("fghDisableVertexAttribArray", fghDisableVertexAttribArray = (FGH_PFNGLDISABLEVERTEXATTRIBARRAYPROC)glutGetProcAddress("glDisableVertexAttribArray"));
73 #undef CHECK
74 fgState.HasOpenGL20 = 1;
75 #endif
76 }