/*

SDL - Simple DirectMedia Layer

This library is free software; you can redistribute it and/or

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Sam Lantinga

slouken@libsdl.org

*/

#include <dlfcn.h>

#include "SDL.h"

#include "SDL_ph_gl.h"

#if (_NTO_VERSION >= 630)

/* PhotonGL functions */

GLPH_DECLARE_FUNCS;

#endif /* 6.3.0 */

#if (_NTO_VERSION < 630)

void ph_GL_SwapBuffers(_THIS)

{

PgSetRegion(PtWidgetRid(window));

PdOpenGLContextSwapBuffers(oglctx);

}

#else

void ph_GL_SwapBuffers(_THIS)

{

qnxgl_swap_buffers(oglbuffers);

}

#endif /* 6.3.0 */

int ph_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)

{

switch (attrib)

{

case SDL_GL_DOUBLEBUFFER:

*value=this->gl_config.double_buffer;

break;

case SDL_GL_STENCIL_SIZE:

*value=this->gl_config.stencil_size;

break;

case SDL_GL_DEPTH_SIZE:

*value=this->gl_config.depth_size;

break;

#if (_NTO_VERSION >= 630)

case SDL_GL_RED_SIZE:

*value=this->gl_config.red_size;

break;

case SDL_GL_GREEN_SIZE:

*value=this->gl_config.green_size;

break;

case SDL_GL_BLUE_SIZE:

*value=this->gl_config.blue_size;

break;

case SDL_GL_ALPHA_SIZE:

*value=this->gl_config.alpha_size;

break;

case SDL_GL_ACCUM_RED_SIZE:

*value=this->gl_config.accum_red_size;

break;

case SDL_GL_ACCUM_GREEN_SIZE:

*value=this->gl_config.accum_green_size;

break;

case SDL_GL_ACCUM_BLUE_SIZE:

*value=this->gl_config.accum_blue_size;

break;

case SDL_GL_ACCUM_ALPHA_SIZE:

*value=this->gl_config.accum_alpha_size;

break;

case SDL_GL_STEREO:

*value=this->gl_config.stereo;

break;

#endif /* 6.3.0 */

default:

*value=0;

return(-1);

}

return 0;

}

#if (_NTO_VERSION < 630)

int ph_GL_LoadLibrary(_THIS, const char* path)

{

this->gl_config.driver_loaded = 1;

return 0;

}

#else

int ph_GL_LoadLibrary(_THIS, const char* path)

{

void* handle;

int dlopen_flags=RTLD_WORLD | RTLD_GROUP;

if (this->gl_config.dll_handle!=NULL)

{

return 0;

}

handle = dlopen(path, dlopen_flags);

if (handle==NULL)

{

SDL_SetError("ph_GL_LoadLibrary(): Could not load OpenGL library");

return -1;

}

this->gl_config.dll_handle = handle;

this->gl_config.driver_loaded = 1;

return 0;

}

#endif /* 6.3.0 */

#if (_NTO_VERSION < 630)

void* ph_GL_GetProcAddress(_THIS, const char* proc)

{

return NULL;

}

#else

void* ph_GL_GetProcAddress(_THIS, const char* proc)

{

void* function;

if (this->gl_config.dll_handle==NULL)

{

ph_GL_LoadLibrary(this, DEFAULT_OPENGL);

if (this->gl_config.dll_handle==NULL)

{

return NULL;

}

}

function=qnxgl_get_func(proc, oglctx, 0);

if (function==NULL)

{

function=dlsym(this->gl_config.dll_handle, proc);

}

return function;

}

#endif /* 6.3.0 */

#if (_NTO_VERSION < 630)

int ph_GL_MakeCurrent(_THIS)

{

PgSetRegion(PtWidgetRid(window));

if (oglctx!=NULL)

{

PhDCSetCurrent(oglctx);

}

return 0;

}

#else

int ph_GL_MakeCurrent(_THIS)

{

PgSetRegion(PtWidgetRid(window));

if (oglctx!=NULL)

{

if (qnxgl_set_current(oglctx) == -1)

{

return -1;

}

}

return 0;

}

#endif /* 6.3.0 */

#if (_NTO_VERSION < 630)

/* This code is actual for the Photon3D Runtime which was available prior to 6.3 only */

int ph_SetupOpenGLContext(_THIS, int width, int height, int bpp, Uint32 flags)

{

PhDim_t dim;

uint64_t OGLAttrib[PH_OGL_MAX_ATTRIBS];

int exposepost=0;

int OGLargc;

dim.w=width;

dim.h=height;

if ((oglctx!=NULL) && (oglflags==flags) && (oglbpp==bpp))

{

PdOpenGLContextResize(oglctx, &dim);

PhDCSetCurrent(oglctx);

return 0;

}

else

{

if (oglctx!=NULL)

{

PhDCSetCurrent(NULL);

PhDCRelease(oglctx);

oglctx=NULL;

exposepost=1;

}

}

OGLargc=0;

if (this->gl_config.depth_size)

{

OGLAttrib[OGLargc++]=PHOGL_ATTRIB_DEPTH_BITS;

OGLAttrib[OGLargc++]=this->gl_config.depth_size;

}

if (this->gl_config.stencil_size)

{

OGLAttrib[OGLargc++]=PHOGL_ATTRIB_STENCIL_BITS;

OGLAttrib[OGLargc++]=this->gl_config.stencil_size;

}

OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FORCE_SW;

if (flags & SDL_FULLSCREEN)

{

OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FULLSCREEN;

OGLAttrib[OGLargc++]=PHOGL_ATTRIB_DIRECT;

OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FULLSCREEN_BEST;

OGLAttrib[OGLargc++]=PHOGL_ATTRIB_FULLSCREEN_CENTER;

}

OGLAttrib[OGLargc++]=PHOGL_ATTRIB_NONE;

if (this->gl_config.double_buffer)

{

oglctx=PdCreateOpenGLContext(2, &dim, 0, OGLAttrib);

}

else

{

oglctx=PdCreateOpenGLContext(1, &dim, 0, OGLAttrib);

}

if (oglctx==NULL)

{

SDL_SetError("ph_SetupOpenGLContext(): cannot create OpenGL context !\n");

return -1;

}

PhDCSetCurrent(oglctx);

PtFlush();

oglflags=flags;

oglbpp=bpp;

if (exposepost!=0)

{

/* OpenGL context has been recreated, so report about this fact */

SDL_PrivateExpose();

}

return 0;

}

#else /* _NTO_VERSION */

/* This code is actual for the built-in PhGL support, which became available since 6.3 */

int ph_SetupOpenGLContext(_THIS, int width, int height, int bpp, Uint32 flags)

{

qnxgl_buf_attrib_t qnxgl_attribs[PH_OGL_MAX_ATTRIBS];

qnxgl_buf_attrib_t* qnxgl_attribs_slide;

int num_interfaces = 0;

int num_buffers = 0;

/* Initialize the OpenGL subsystem */

num_interfaces = qnxgl_init(NULL, NULL, 0);

if (num_interfaces < 0)

{

SDL_SetError("ph_SetupOpenGLContext(): cannot initialize OpenGL subsystem !\n");

return -1;

}

if (num_interfaces == 0)

{

SDL_SetError("ph_SetupOpenGLContext(): there are no available OpenGL renderers was found !\n");

return -1;

}

/* Driver is linked */

this->gl_config.driver_loaded=1;

/* Initialize the OpenGL context attributes */

qnxgl_attribs_slide=qnxgl_attribs;

/* Depth size */

if (this->gl_config.depth_size)

{

fprintf(stderr, "setted depth size %d\n", this->gl_config.depth_size);

qnxgl_attribs_slide = qnxgl_attrib_set_depth(qnxgl_attribs_slide, this->gl_config.depth_size);

}

/* Stencil size */

if (this->gl_config.stencil_size)

{

qnxgl_attribs_slide = qnxgl_attrib_set_stencil(qnxgl_attribs_slide, this->gl_config.stencil_size);

}

/* The sum of the accum bits of each channel */

if ((this->gl_config.accum_red_size != 0) && (this->gl_config.accum_blue_size != 0) &&

(this->gl_config.accum_green_size != 0))

{

qnxgl_attribs_slide = qnxgl_attrib_set_accum(qnxgl_attribs_slide,

this->gl_config.accum_red_size + this->gl_config.accum_blue_size +

this->gl_config.accum_green_size + this->gl_config.accum_alpha_size);

}

/* Stereo mode */

if (this->gl_config.stereo)

{

qnxgl_attribs_slide = qnxgl_attrib_set_stereo(qnxgl_attribs_slide);

}

/* Fullscreen mode */

if ((flags & SDL_FULLSCREEN) == SDL_FULLSCREEN)

{

qnxgl_attribs_slide = qnxgl_attrib_set_hint_fullscreen(qnxgl_attribs_slide);

}

/* Double buffering mode */

if (this->gl_config.double_buffer)

{

num_buffers=2;

}

else

{

num_buffers=1;

}

/* Loading the function pointers so we can use the extensions */

GLPH_LOAD_FUNCS_GC(oglctx);

/* Set the buffers region to be that of our window's region */

qnxgl_attribs_slide = glph_attrib_set_region(qnxgl_attribs_slide, PtWidgetRid(window));

/* End of the attributes array */

qnxgl_attribs_slide = qnxgl_attrib_set_end(qnxgl_attribs_slide);

/* Create the buffers with the specified color model */

fprintf(stderr, "ARGB: %d, %d, %d, %d\n", this->gl_config.alpha_size, this->gl_config.red_size, this->gl_config.green_size, this->gl_config.blue_size);

oglbuffers = qnxgl_buffers_create(

QNXGL_FORMAT_BEST_RGB,

/* __QNXGL_BUILD_FORMAT(0, __QNXGL_COLOR_MODEL_RGB, this->gl_config.alpha_size,

this->gl_config.red_size, this->gl_config.green_size, this->gl_config.blue_size), */

num_buffers, width, height, qnxgl_attribs, -1);

if (oglbuffers == NULL)

{

SDL_SetError("ph_SetupOpenGLContext(): failed to create OpenGL buffers !\n");

qnxgl_finish();

return -1;

}

/* Create a QNXGL context for the previously created buffer */

oglctx = qnxgl_context_create(oglbuffers, NULL);

if (oglctx == NULL)

{

SDL_SetError("ph_SetupOpenGLContext(): failed to create OpenGL context !\n");

qnxgl_buffers_destroy(oglbuffers);

qnxgl_finish();

return -1;

}

/* Attempt to make the context current so we can use OpenGL commands */

if (qnxgl_set_current(oglctx) == -1)

{

SDL_SetError("ph_SetupOpenGLContext(): failed to make the OpenGL context current !\n");

qnxgl_context_destroy(oglctx);

qnxgl_buffers_destroy(oglbuffers);

qnxgl_finish();

return -1;

}

PtFlush();

oglflags=flags;

oglbpp=bpp;

return 0;

}

#endif /* _NTO_VERSION */