mirror of
https://github.com/outbackdingo/UltraGrid.git
synced 2026-03-21 08:40:19 +00:00
226c17f02d
Replaced all other autoconf-defined platform macros (HAVE_LINUX and HAVE_MACOSX, WIN32 already done) with those ones defined by compiler. Not yet remove the definitions from autoconf, in case someone will use the old macros anyways. Remove in future.
251 lines
8.6 KiB
C
251 lines
8.6 KiB
C
/**
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* @file gl_context.c
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* @author Martin Pulec <martin.pulec@cesnet.cz>
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*/
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/*
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* Copyright (c) 2012-2023 CESNET, z. s. p. o.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, is permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of CESNET nor the names of its contributors may be
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* used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#include "config_unix.h"
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#include "config_win32.h"
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#endif
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#include <stdio.h>
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#ifdef __APPLE__
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#include "mac_gl_common.h"
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#elif defined __linux__
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#include "x11_common.h"
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#include "glx_common.h"
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#else // _WIN32
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#include "win32_gl_common.h"
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#endif
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#include "debug.h"
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#include "gl_context.h"
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#include "utils/macros.h"
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/**
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* @brief initializes specified OpenGL context
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*
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* @note
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* After this call, context is current for calling thread.
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*
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* @param[out] context newly created context
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* @param which OpenGL version specifier
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* @return info if context creation succeeded or failed
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*/
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bool init_gl_context(struct gl_context *context, int which) {
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context->context = NULL;
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#ifdef __linux__
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if(which == GL_CONTEXT_ANY) {
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debug_msg("Trying OpenGL 3.1 first.\n");
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context->context = glx_init(MK_OPENGL_VERSION(3,1));
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context->legacy = FALSE;
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}
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if(!context->context) {
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if(which != GL_CONTEXT_LEGACY) {
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debug_msg("OpenGL 3.1 profile failed to initialize, falling back to legacy profile.\n");
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}
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context->context = glx_init(OPENGL_VERSION_UNSPECIFIED);
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context->legacy = TRUE;
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}
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if(context->context) {
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glx_validate(context->context);
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}
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#elif defined __APPLE__
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if(which == GL_CONTEXT_ANY) {
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if(get_mac_kernel_version_major() >= 11) {
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debug_msg("Mac 10.7 or latter detected. Trying OpenGL 3.2 Core profile first.\n");
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context->context = mac_gl_init(MAC_GL_PROFILE_3_2);
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if(!context->context) {
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debug_msg("OpenGL 3.2 Core profile failed to initialize, falling back to legacy profile.\n");
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} else {
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context->legacy = FALSE;
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}
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}
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}
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if(!context->context) {
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context->context = mac_gl_init(MAC_GL_PROFILE_LEGACY);
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context->legacy = TRUE;
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}
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#else // _WIN32
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if(which == GL_CONTEXT_ANY) {
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context->context = win32_context_init(OPENGL_VERSION_UNSPECIFIED);
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} else if(which == GL_CONTEXT_LEGACY) {
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context->context = win32_context_init(OPENGL_VERSION_LEGACY);
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}
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context->legacy = TRUE;
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#endif
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{
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char *save_ptr;
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const char *gl_ver = (const char *) glGetString(GL_VERSION);
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if (!gl_ver) {
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fprintf(stderr, "Unable to determine OpenGL version!\n");
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return false;
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}
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char *tmp = strdup(gl_ver);
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char *item = strtok_r(tmp, ".", &save_ptr);
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if (!item) {
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fprintf(stderr, "Unable to determine OpenGL version!\n");
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free(tmp);
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return false;
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}
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context->gl_major = atoi(item);
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item = strtok_r(NULL, ".", &save_ptr);
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if (!item) {
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fprintf(stderr, "Unable to determine OpenGL version!\n");
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free(tmp);
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return false;
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}
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context->gl_minor = atoi(item);
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free(tmp);
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}
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if(context->context) {
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return true;
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} else {
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return false;
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}
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}
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GLuint glsl_compile_link(const char *vprogram, const char *fprogram)
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{
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char log[32768];
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GLuint vhandle = 0;
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GLuint fhandle = 0;
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GLint status;
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log_msg(LOG_LEVEL_DEBUG, "Compiling program:\nVertex:%s\nShader:\n%s\n", IF_NOT_NULL_ELSE(vprogram, "(none)"), IF_NOT_NULL_ELSE(fprogram, "(none)"));
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/* compile */
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/* fragmemt */
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if (fprogram) {
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fhandle = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(fhandle, 1, &fprogram, NULL);
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glCompileShader(fhandle);
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glGetShaderiv(fhandle, GL_COMPILE_STATUS, &status);
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/* Print compile log */
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glGetShaderInfoLog(fhandle, sizeof log, NULL, log);
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if (status == GL_FALSE || (strlen(log) > 0 && log_level >= LOG_LEVEL_VERBOSE)) {
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log_msg(status == GL_FALSE ? LOG_LEVEL_ERROR : LOG_LEVEL_VERBOSE, "Fragment compile log: %s\n", log);
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}
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if (status != GL_TRUE) {
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glDeleteShader(fhandle);
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return 0;
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}
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}
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/* vertex */
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if (vprogram) {
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vhandle = glCreateShader(GL_VERTEX_SHADER);
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glShaderSource(vhandle, 1, &vprogram, NULL);
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glCompileShader(vhandle);
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glGetShaderiv(vhandle, GL_COMPILE_STATUS, &status);
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/* Print compile log */
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glGetShaderInfoLog(vhandle, sizeof log, NULL, log);
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if (status == GL_FALSE || (strlen(log) > 0 && log_level >= LOG_LEVEL_VERBOSE)) {
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log_msg(status == GL_FALSE ? LOG_LEVEL_ERROR : LOG_LEVEL_VERBOSE, "Vertex compile log: %s\n", log);
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}
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if (status != GL_TRUE) {
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glDeleteShader(fhandle);
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glDeleteShader(vhandle);
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return 0;
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}
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}
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GLuint phandle = glCreateProgram();
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/* attach and link */
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if (vprogram) {
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glAttachShader(phandle, vhandle);
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}
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if (fprogram) {
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glAttachShader(phandle, fhandle);
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}
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glLinkProgram(phandle);
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// mark shaders for deletion when program is deleted
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glDeleteShader(vhandle);
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glDeleteShader(fhandle);
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glGetProgramiv(phandle, GL_LINK_STATUS, &status);
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glGetProgramInfoLog(phandle, sizeof log, NULL, (GLchar*) log);
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if (status == GL_FALSE || (strlen(log) > 0 && log_level >= LOG_LEVEL_VERBOSE)) {
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log_msg(status == GL_FALSE ? LOG_LEVEL_ERROR : LOG_LEVEL_VERBOSE, "Link log: %s\n", log);
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}
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if (status != GL_TRUE) {
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glDeleteProgram(phandle);
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return 0;
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}
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// check GL errors
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gl_check_error();
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return phandle;
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}
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void destroy_gl_context(struct gl_context *context) {
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if (context == NULL || context->context == NULL) {
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return;
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}
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#ifdef __APPLE__
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mac_gl_free(context->context);
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#elif defined __linux__
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glx_free(context->context);
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#else
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win32_context_free(context->context);
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#endif
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}
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void gl_context_make_current(struct gl_context *context)
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{
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void *context_state = NULL;
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if(context) {
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context_state = context->context;
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}
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#ifdef __linux__
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glx_make_current(context_state);
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#elif defined __APPLE__
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mac_gl_make_current(context_state);
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#else
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win32_context_make_current(context_state);
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#endif
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}
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