//--------------------------------------------------------------
// initialize graphics
BOOL mgLinuxGL33Support::initDisplay()
{
mgDebug("------ try to create OpenGL 3.3 context, fullscreen=%s, multiSample=%s",
m_fullscreen?"true":"false",
m_multiSample?"true":"false");
mgLinuxServices* platform = (mgLinuxServices*) mgPlatform;
// =-= some drivers are failing this test. not clear we need it
#ifdef WORKED
int glxMajor, glxMinor;
glXQueryVersion(platform->m_display, &glxMajor, &glxMinor);
mgDebug("GLX version = %d.%d", glxMajor, glxMinor);
int glxVersion = glxMajor * 100 + glxMinor;
if (glxVersion < 103)
{
mgDebug("GLX version < 1.3");
termDisplay();
return false;
}
#endif
PFNGLXCREATECONTEXTATTRIBSARBPROC fnCreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress((const GLubyte*) "glXCreateContextAttribsARB");
PFNGLGETSTRINGIPROC fnGetStringi = (PFNGLGETSTRINGIPROC)glXGetProcAddress((const GLubyte*) "glGetStringi");
if (fnCreateContextAttribsARB == NULL || fnGetStringi == NULL)
{
mgDebug("Could not locate OpenGL functions");
termDisplay();
return false;
}
platform->m_glrc = (*fnCreateContextAttribsARB) (platform->m_display, platform->m_bestFbc, NULL, true, GL33_CREATE_ATTRIBUTES);
if (platform->m_glrc == NULL)
{
mgDebug("glXCreateContextAttribsARB 3.3 returns NULL. Trying 3.2");
platform->m_glrc = (*fnCreateContextAttribsARB) (platform->m_display, platform->m_bestFbc, NULL, true, GL32_CREATE_ATTRIBUTES);
if (platform->m_glrc == NULL)
{
mgDebug("glXCreateContextAttribsARB 3.2 returns NULL. I give up.");
termDisplay();
return false;
}
}
glXMakeCurrent(platform->m_display, platform->m_window, platform->m_glrc);
m_depthBits = 16; // default
glXGetConfig(platform->m_display, platform->m_vi, GLX_DEPTH_SIZE, &m_depthBits);
mgDebug("%d depth bits", m_depthBits);
// build an extension list for glew with glGetStringi
mgString extList;
int i = 0;
for (; ; i++)
{
const GLubyte* ext = (*fnGetStringi)(GL_EXTENSIONS, i);
if (ext == NULL)
break;
extList += (const char*) ext;
extList += " ";
}
mgDebug("glGetStringi returns %d extensions", i);
checkError(); // clear error from requesting last extension
// save extensions list for glew
glExtensions = (GLubyte*) new char[1+extList.length()];
strcpy((char*) glExtensions, (const char*) extList);
GLenum err = glewInit();
if (err != GLEW_OK)
{
mgDebug("Cannot initialize OpenGL - glewInit failed.");
termDisplay();
return false;
}
// accept OpenGL 3.2, but need #version 330 shader
mgString errorMsg;
if (!checkVersion(302, 303, errorMsg))
{
mgDebug("%s", (const char*) errorMsg);
termDisplay();
return false;
}
if (m_swapImmediate)
{
PFNGLXSWAPINTERVALMESAPROC fnSwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC)glXGetProcAddress((const GLubyte*) "glXSwapIntervalMESA");
if (fnSwapIntervalMESA != NULL)
(*fnSwapIntervalMESA) (0);
else
{
PFNGLXSWAPINTERVALSGIPROC fnSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddress((const GLubyte*) "glXSwapIntervalSGI");
if (fnSwapIntervalSGI != NULL)
(*fnSwapIntervalSGI) (0);
else mgDebug("Cannot find glXSwapInterval");
}
}
if (m_multiSample)
glEnable(GL_MULTISAMPLE);
// compile the overlay shader
mgDebug("compile overlay shader:");
const char* attrNames[] = {"vertPoint", "vertTexCoord0"};
const DWORD attrIndexes[] = {0, 1};
m_overlayShader = compileShaderPair(GL33_OVERLAY_VERTEX_SHADER, GL33_OVERLAY_FRAGMENT_SHADER,
2, attrNames, attrIndexes);
if (m_overlayShader == 0)
{
mgDebug("Cannot compile overlay shader.");
termDisplay();
return false;
}
const char* vendor = (const char*) glGetString(GL_VENDOR);
if (vendor != NULL)
mgDebug(":OpenGL device vendor: %s", (const char*) vendor);
const char* renderer = (const char*) glGetString(GL_RENDERER);
if (renderer != NULL)
mgDebug(":OpenGL device renderer: %s", (const char*) renderer);
const char* versionStr = (const char*) glGetString(GL_VERSION);
if (versionStr != NULL)
mgDebug(":OpenGL version: %s", (const char*) versionStr);
const char* shaderVersionStr = (const char*) glGetString(GL_SHADING_LANGUAGE_VERSION);
if (shaderVersionStr != NULL)
mgDebug(":OpenGL shader version: %s", (const char*) shaderVersionStr);
// report all the GL limits
GLint value;
#define GLREPORT(sym) value = INT_MAX; glGetIntegerv(sym, &value); if (value != INT_MAX) mgDebug(":%s: %d", #sym, value);
GLREPORT(GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS);
GLREPORT(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS);
GLREPORT(GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS);
GLREPORT(GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS);
GLREPORT(GL_MAX_VARYING_COMPONENTS);
GLREPORT(GL_MAX_COMBINED_UNIFORM_BLOCKS);
GLREPORT(GL_MAX_CUBE_MAP_TEXTURE_SIZE);
GLREPORT(GL_MAX_DRAW_BUFFERS);
GLREPORT(GL_MAX_ELEMENTS_INDICES);
GLREPORT(GL_MAX_ELEMENTS_VERTICES);
GLREPORT(GL_MAX_FRAGMENT_UNIFORM_COMPONENTS);
GLREPORT(GL_MAX_FRAGMENT_UNIFORM_BLOCKS);
GLREPORT(GL_MAX_FRAGMENT_INPUT_COMPONENTS);
GLREPORT(GL_MIN_PROGRAM_TEXEL_OFFSET);
GLREPORT(GL_MAX_PROGRAM_TEXEL_OFFSET);
GLREPORT(GL_MAX_RECTANGLE_TEXTURE_SIZE);
GLREPORT(GL_MAX_TEXTURE_IMAGE_UNITS);
GLREPORT(GL_MAX_TEXTURE_LOD_BIAS);
GLREPORT(GL_MAX_TEXTURE_SIZE);
GLREPORT(GL_MAX_RENDERBUFFER_SIZE);
GLREPORT(GL_MAX_ARRAY_TEXTURE_LAYERS);
GLREPORT(GL_MAX_TEXTURE_BUFFER_SIZE);
GLREPORT(GL_MAX_UNIFORM_BLOCK_SIZE);
GLREPORT(GL_MAX_VARYING_FLOATS);
GLREPORT(GL_MAX_VERTEX_ATTRIBS);
GLREPORT(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS);
GLREPORT(GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS);
GLREPORT(GL_MAX_VERTEX_UNIFORM_COMPONENTS);
GLREPORT(GL_MAX_VERTEX_OUTPUT_COMPONENTS);
GLREPORT(GL_MAX_GEOMETRY_UNIFORM_COMPONENTS);
GLREPORT(GL_MAX_SAMPLE_MASK_WORDS);
GLREPORT(GL_MAX_COLOR_TEXTURE_SAMPLES);
GLREPORT(GL_MAX_DEPTH_TEXTURE_SAMPLES);
GLREPORT(GL_MAX_DEPTH_TEXTURE_SAMPLES);
GLREPORT(GL_MAX_INTEGER_SAMPLES);
GLREPORT(GL_MAX_UNIFORM_BUFFER_BINDINGS);
GLREPORT(GL_MAX_UNIFORM_BLOCK_SIZE);
GLREPORT(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT);
GLREPORT(GL_MAX_VERTEX_UNIFORM_BLOCKS);
GLREPORT(GL_MAX_GEOMETRY_UNIFORM_BLOCKS);
GLREPORT(GL_MAX_GEOMETRY_INPUT_COMPONENTS);
GLREPORT(GL_MAX_GEOMETRY_OUTPUT_COMPONENTS);
#undef GLREPORT
return true;
}
//--------------------------------------------------------------
// initialize graphics
BOOL mgWinGL21Support::initDisplay()
{
mgDebug("------ try to create OpenGL 2.1 context, fullscreen=%s, multiSample=%s",
m_fullscreen?"true":"false",
m_multiSample?"true":"false");
mgGLInit();
// save the GL_EXTENSIONS from the base driver as backup
const GLubyte* defaultExtensions = glGetString(GL_EXTENSIONS);
PFNWGLCHOOSEPIXELFORMATARBPROC fnChoosePixelFormatARB = (PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
PFNWGLCREATECONTEXTATTRIBSARBPROC fnCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)wglGetProcAddress("wglCreateContextAttribsARB");
PFNGLGETSTRINGIPROC fnGetStringi = (PFNGLGETSTRINGIPROC)wglGetProcAddress("glGetStringi");
PFNWGLGETPIXELFORMATATTRIBIVARBPROC fnGetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC) wglGetProcAddress("wglGetPixelFormatAttribivARB");
if (fnChoosePixelFormatARB == NULL ||
fnCreateContextAttribsARB == NULL ||
fnGetStringi == NULL)
{
mgDebug("GLCreate unable to locate OpenGL methods");
termDisplay();
return false;
}
int* formatAttribs;
if (m_multiSample)
formatAttribs = GL21_MULTISAMPLE_ATTRIBUTES;
else formatAttribs = GL21_DEFAULT_ATTRIBUTES;
float floatFormatAttribs[] = {
0.0f
};
int formats[1];
UINT formatCount;
(*fnChoosePixelFormatARB) (m_dc, formatAttribs, floatFormatAttribs, 1, formats, &formatCount);
if (formatCount < 1)
{
// fall back to default, not multisample
(*fnChoosePixelFormatARB) (m_dc, GL21_DEFAULT_ATTRIBUTES, floatFormatAttribs, 1, formats, &formatCount);
if (formatCount < 1)
{
mgDebug("OpenGL: No available pixel formats");
termDisplay();
return false;
}
}
if (fnGetPixelFormatAttribivARB != NULL)
{
// HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int* piAttributes, int *piValues
int attribs[] = {WGL_RED_BITS_ARB, WGL_GREEN_BITS_ARB, WGL_BLUE_BITS_ARB, WGL_ALPHA_BITS_ARB, WGL_DEPTH_BITS_ARB, WGL_SAMPLES_ARB};
int values[6];
(*fnGetPixelFormatAttribivARB) (m_dc, formats[0], 0, 6, attribs, values);
mgDebug("wglGetPixelFormatARB = R%dG%dB%dA%d, %d depth, %d multisample", values[0], values[1], values[2], values[3], values[4], values[5]);
}
PIXELFORMATDESCRIPTOR pfd;
memset(&pfd, 0, sizeof(pfd));
m_pixelFormat = formats[0];
SetPixelFormat(m_dc, m_pixelFormat, &pfd);
DescribePixelFormat(m_dc, m_pixelFormat, sizeof(pfd), &pfd);
m_depthBits = 16; // assumed, since that's what we requested
if (pfd.cDepthBits != 0)
m_depthBits = pfd.cDepthBits;
m_glrc = (*fnCreateContextAttribsARB)(m_dc, NULL, GL21_CREATE_ATTRIBUTES);
if (m_glrc == NULL)
{
mgDebug("OpenGL wglCreateContextAttribsARB returns NUL");
termDisplay();
return false;
}
if (!wglMakeCurrent(m_dc, m_glrc))
{
mgDebug("OpenGL: cannot make rc current.");
termDisplay();
return false;
}
// get the extension list again now that we have chosen driver
const GLubyte* extensions = glGetString(GL_EXTENSIONS);
// if no extensions, try building them with glGetStringi
if (extensions == NULL)
{
mgDebug("glGetString(GL_EXTENSIONS) returns NULL");
int listAlloc = 80;
int listLen = 0;
char* extList = new char[listAlloc];
int i = 0;
for (; ; i++)
{
const GLubyte* ext = (*fnGetStringi)(GL_EXTENSIONS, i);
if (ext == NULL)
break;
int extLen = strlen((const char*) ext);
// reallocate the list if we need more room
if (listLen + extLen+1 > listAlloc)
{
listAlloc = listAlloc + extLen + 512;
char* newList = new char[listAlloc];
memcpy(newList, extList, listLen);
delete extList;
extList = newList;
}
strcpy(extList+listLen, (const char*) ext);
listLen += extLen;
extList[listLen++] = ' ';
}
extList[listLen] = '\0';
mgDebug("glGetStringi returns %d extensions", i);
// if there were no individual extensions, use default list
if (listLen != 0)
glExtensions = (GLubyte*) extList;
else glExtensions = (GLubyte*) defaultExtensions;
}
GLenum err = glewInit();
if (err != GLEW_OK)
{
mgDebug("Cannot initialize OpenGL - glewInit failed.");
termDisplay();
return false;
}
mgString errorMsg;
if (!checkVersion(201, 102, errorMsg))
{
mgDebug("%s", (const char*) errorMsg);
termDisplay();
return false;
}
if (m_multiSample)
glEnable(GL_MULTISAMPLE);
if (m_swapImmediate)
wglSwapIntervalEXT(0);
// compile the overlay shader
mgDebug("compile overlay shader:");
const char* attrNames[] = {"vertPoint", "vertTexCoord0"};
const DWORD attrIndexes[] = {0, 1};
m_overlayShader = compileShaderPair(GL21_OVERLAY_VERTEX_SHADER, GL21_OVERLAY_FRAGMENT_SHADER,
2, attrNames, attrIndexes);
return true;
}
//--------------------------------------------------------------
// initialize graphics
BOOL mgLinuxGL21Support::initDisplay()
{
mgDebug("------ try to create OpenGL 2.1 context, fullscreen=%s, multiSample=%s",
m_fullscreen?"true":"false",
m_multiSample?"true":"false");
mgLinuxServices* system = (mgLinuxServices*) mgPlatform;
// =-= some drivers are failing this test. not clear we need it
#ifdef WORKED
int glxMajor, glxMinor;
glXQueryVersion(system->m_display, &glxMajor, &glxMinor);
mgDebug("GLX version = %d.%d", glxMajor, glxMinor);
int glxVersion = glxMajor * 100 + glxMinor;
if (glxVersion < 103)
{
mgDebug("GLX version < 1.3");
termDisplay();
return false;
}
#endif
system->m_glrc = glXCreateContext(system->m_display, system->m_vi, NULL, true);
if (system->m_glrc == NULL)
{
mgDebug("Could not glXCreateContext");
termDisplay();
return false;
}
glXMakeCurrent(system->m_display, system->m_window, system->m_glrc);
m_depthBits = 16; // default
glXGetConfig(system->m_display, system->m_vi, GLX_DEPTH_SIZE, &m_depthBits);
mgDebug("%d depth bits", m_depthBits);
// get the extension list again now that we have chosen driver
GLenum err = glewInit();
if (err != GLEW_OK)
{
mgDebug("Cannot initialize OpenGL - glewInit failed.");
termDisplay();
return false;
}
mgString errorMsg;
if (!checkVersion(201, 102, errorMsg))
{
mgDebug("%s", (const char*) errorMsg);
termDisplay();
return false;
}
if (m_swapImmediate)
{
PFNGLXSWAPINTERVALMESAPROC fnSwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC)glXGetProcAddress((const GLubyte*) "glXSwapIntervalMESA");
if (fnSwapIntervalMESA != NULL)
(*fnSwapIntervalMESA) (0);
else
{
PFNGLXSWAPINTERVALSGIPROC fnSwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddress((const GLubyte*) "glXSwapIntervalSGI");
if (fnSwapIntervalSGI != NULL)
(*fnSwapIntervalSGI) (0);
else mgDebug("Cannot find glXSwapInterval");
}
}
if (system->getMultiSample())
glEnable(GL_MULTISAMPLE);
// compile the overlay shader
mgDebug("compile overlay shader:");
const char* attrNames[] = {"vertPoint", "vertTexCoord0"};
const DWORD attrIndexes[] = {0, 1};
m_overlayShader = compileShaderPair(GL21_OVERLAY_VERTEX_SHADER, GL21_OVERLAY_FRAGMENT_SHADER,
2, attrNames, attrIndexes);
return true;
}
