filename | src/pvr2/glutil.c |
changeset | 1066:ddffe9d2b332 |
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author | nkeynes |
date | Mon Aug 03 08:41:11 2009 +1000 (14 years ago) |
permissions | -rw-r--r-- |
last change | Rearrange frame output slightly. pvr2_display_frame renamed to pvr2_next_frame and changed to update the frame data without displaying it. pvr2_redraw_display renamed to pvr2_draw_frame, called internally after pvr2_next_frame Add swap_buffers() method to the display driver Remove explicit glDrawBuffer() calls where they're referencing the window. pvr2_draw_frame now gets to decide where to draw. Add force_vsync flag to force double-buffering (not configurable yet) |
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nkeynes@635 | 1 | /** |
nkeynes@636 | 2 | * $Id$ |
nkeynes@635 | 3 | * |
nkeynes@635 | 4 | * GL-based support functions |
nkeynes@635 | 5 | * |
nkeynes@635 | 6 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@635 | 7 | * |
nkeynes@635 | 8 | * This program is free software; you can redistribute it and/or modify |
nkeynes@635 | 9 | * it under the terms of the GNU General Public License as published by |
nkeynes@635 | 10 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@635 | 11 | * (at your option) any later version. |
nkeynes@635 | 12 | * |
nkeynes@635 | 13 | * This program is distributed in the hope that it will be useful, |
nkeynes@635 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@635 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@635 | 16 | * GNU General Public License for more details. |
nkeynes@635 | 17 | */ |
nkeynes@736 | 18 | |
nkeynes@645 | 19 | #include <string.h> |
nkeynes@687 | 20 | #include <glib/gstrfuncs.h> |
nkeynes@635 | 21 | #include "pvr2/glutil.h" |
nkeynes@635 | 22 | |
nkeynes@667 | 23 | gboolean isGLSecondaryColorSupported() |
nkeynes@667 | 24 | { |
nkeynes@736 | 25 | return isGLExtensionSupported("GL_EXT_secondary_color"); |
nkeynes@667 | 26 | } |
nkeynes@667 | 27 | |
nkeynes@667 | 28 | gboolean isGLVertexBufferSupported() |
nkeynes@667 | 29 | { |
nkeynes@736 | 30 | return isGLExtensionSupported("GL_ARB_vertex_buffer_object"); |
nkeynes@667 | 31 | } |
nkeynes@667 | 32 | |
nkeynes@667 | 33 | gboolean isGLPixelBufferSupported() |
nkeynes@667 | 34 | { |
nkeynes@736 | 35 | return isGLExtensionSupported("GL_ARB_pixel_buffer_object"); |
nkeynes@667 | 36 | } |
nkeynes@667 | 37 | |
nkeynes@667 | 38 | gboolean isGLMirroredTextureSupported() |
nkeynes@667 | 39 | { |
nkeynes@736 | 40 | return isGLExtensionSupported("GL_ARB_texture_mirrored_repeat"); |
nkeynes@667 | 41 | } |
nkeynes@667 | 42 | |
nkeynes@635 | 43 | /** |
nkeynes@635 | 44 | * Test if a specific extension is supported. From opengl.org |
nkeynes@635 | 45 | * @param extension extension name to check for |
nkeynes@635 | 46 | * @return TRUE if supported, otherwise FALSE. |
nkeynes@635 | 47 | */ |
nkeynes@635 | 48 | gboolean isGLExtensionSupported( const char *extension ) |
nkeynes@635 | 49 | { |
nkeynes@635 | 50 | const GLubyte *extensions = NULL; |
nkeynes@635 | 51 | const GLubyte *start; |
nkeynes@635 | 52 | GLubyte *where, *terminator; |
nkeynes@635 | 53 | |
nkeynes@635 | 54 | /* Extension names should not have spaces. */ |
nkeynes@635 | 55 | where = (GLubyte *) strchr(extension, ' '); |
nkeynes@635 | 56 | if (where || *extension == '\0') |
nkeynes@736 | 57 | return 0; |
nkeynes@635 | 58 | extensions = glGetString(GL_EXTENSIONS); |
nkeynes@645 | 59 | if( extensions == NULL ) { |
nkeynes@736 | 60 | /* No GL available, so we're pretty sure the extension isn't |
nkeynes@736 | 61 | * available either. */ |
nkeynes@736 | 62 | return FALSE; |
nkeynes@645 | 63 | } |
nkeynes@635 | 64 | /* It takes a bit of care to be fool-proof about parsing the |
nkeynes@635 | 65 | OpenGL extensions string. Don't be fooled by sub-strings, |
nkeynes@635 | 66 | etc. */ |
nkeynes@635 | 67 | start = extensions; |
nkeynes@635 | 68 | for (;;) { |
nkeynes@736 | 69 | where = (GLubyte *) strstr((const char *) start, extension); |
nkeynes@736 | 70 | if (!where) |
nkeynes@736 | 71 | break; |
nkeynes@736 | 72 | terminator = where + strlen(extension); |
nkeynes@736 | 73 | if (where == start || *(where - 1) == ' ') |
nkeynes@736 | 74 | if (*terminator == ' ' || *terminator == '\0') |
nkeynes@736 | 75 | return TRUE; |
nkeynes@736 | 76 | start = terminator; |
nkeynes@635 | 77 | } |
nkeynes@635 | 78 | return FALSE; |
nkeynes@635 | 79 | } |
nkeynes@687 | 80 | |
nkeynes@687 | 81 | void glPrintInfo( FILE *out ) |
nkeynes@687 | 82 | { |
nkeynes@700 | 83 | const gchar *extensions = (const gchar *)glGetString(GL_EXTENSIONS); |
nkeynes@687 | 84 | gchar **ext_split = g_strsplit(extensions, " ", 0); |
nkeynes@687 | 85 | unsigned int i; |
nkeynes@736 | 86 | |
nkeynes@687 | 87 | fprintf( out, "GL Vendor: %s\n", glGetString(GL_VENDOR) ); |
nkeynes@687 | 88 | fprintf( out, "GL Renderer: %s\n", glGetString(GL_RENDERER) ); |
nkeynes@687 | 89 | fprintf( out, "GL Version: %s\n", glGetString(GL_VERSION) ); |
nkeynes@736 | 90 | |
nkeynes@687 | 91 | fprintf( out, "Supported GL Extensions:\n" ); |
nkeynes@687 | 92 | for( i=0; ext_split[i] != NULL; i++ ) { |
nkeynes@687 | 93 | fprintf( out, " %s\n", ext_split[i] ); |
nkeynes@687 | 94 | } |
nkeynes@687 | 95 | g_strfreev(ext_split); |
nkeynes@687 | 96 | } |
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