int
S9xOpenGLDisplayDriver::opengl_defaults (void)
{
using_pbos = 0;
if (config->use_pbos)
{
if (!load_pixel_buffer_functions ())
{
fprintf (stderr, _("pixel_buffer_object extension not supported.\n"));
config->use_pbos = 0;
}
else
{
using_pbos = 1;
}
}
using_shaders = 0;
if (config->use_shaders)
{
if (!load_shaders (config->vertex_shader, config->fragment_shader))
{
config->use_shaders = 0;
}
else
{
using_shaders = 1;
}
}
tex_target = GL_TEXTURE_2D;
texture_width = 1024;
texture_height = 1024;
dyn_resizing = FALSE;
const char *extensions = (const char *) glGetString (GL_EXTENSIONS);
if (extensions && config->npot_textures)
{
if (!using_shaders && strstr (extensions, "_texture_rectangle"))
{
tex_target = GL_TEXTURE_RECTANGLE;
texture_width = scaled_max_width;
texture_height = scaled_max_height;
dyn_resizing = TRUE;
}
else if (strstr (extensions, "GL_ARB_texture_non_power_of_two"))
{
dyn_resizing = TRUE;
}
}
glEnable (GL_VERTEX_ARRAY);
glEnable (GL_TEXTURE_COORD_ARRAY);
vertices[0] = 0.0f;
vertices[1] = 0.0f;
vertices[2] = 1.0f;
vertices[3] = 0.0f;
vertices[4] = 1.0f;
vertices[5] = 1.0f;
vertices[6] = 0.0f;
vertices[7] = 1.0f;
glVertexPointer (2, GL_FLOAT, 0, vertices);
texcoords[0] = 0.0f;
texcoords[5] = 0.0f;
texcoords[6] = 0.0f;
texcoords[7] = 0.0f;
glTexCoordPointer (2, GL_FLOAT, 0, texcoords);
if (config->use_pbos)
{
glGenBuffers (1, &pbo);
glGenTextures (1, &texmap);
glBindTexture (tex_target, texmap);
glTexImage2D (tex_target,
0,
config->pbo_format == PBO_FMT_16 ? GL_RGB5_A1 : 4,
texture_width,
texture_height,
0,
PBO_GET_FORMAT (config->pbo_format),
PBO_GET_PACKING (config->pbo_format),
NULL);
glBindBuffer (GL_PIXEL_UNPACK_BUFFER, pbo);
glBufferData (GL_PIXEL_UNPACK_BUFFER,
texture_width * texture_height * 3,
NULL,
GL_STREAM_DRAW);
glBindBuffer (GL_PIXEL_UNPACK_BUFFER, 0);
}
else
{
glGenTextures (1, &texmap);
glBindTexture (tex_target, texmap);
glTexImage2D (tex_target,
0,
GL_RGB5_A1,
texture_width,
texture_height,
0,
GL_BGRA,
GL_UNSIGNED_SHORT_1_5_5_5_REV,
NULL);
}
glEnable (GL_DITHER);
glDisable (GL_POLYGON_SMOOTH);
glShadeModel (GL_FLAT);
glPolygonMode (GL_FRONT, GL_FILL);
glEnable (GL_CULL_FACE);
glCullFace (GL_BACK);
glClearColor (0.0, 0.0, 0.0, 0.0);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glDisable (GL_BLEND);
glDisable (GL_DEPTH_TEST);
glDisable (GL_TEXTURE_2D);
glDisable (GL_TEXTURE_RECTANGLE);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glOrtho (0.0, 1.0, 0.0, 1.0, -1, 1);
return 1;
}
void
S9xOpenGLDisplayDriver::opengl_defaults (void)
{
XVisualInfo *vi;
int glx_attribs[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
Display *display = GDK_DISPLAY ();
vi = glXChooseVisual (display, DefaultScreen (display), glx_attribs);
glx_context = glXCreateContext (display,
vi,
0,
1);
glXMakeCurrent (display, GDK_WINDOW_XWINDOW (drawing_area->window), glx_context);
gl_lock ();
const char *extensions = (const char *) glGetString (GL_EXTENSIONS);
using_pbos = 0;
if (config->use_pbos)
{
if (!load_pixel_buffer_functions ())
{
fprintf (stderr, _("pixel_buffer_object extension not supported.\n"));
config->use_pbos = 0;
}
else
{
using_pbos = 1;
}
}
tex_target = GL_TEXTURE_2D;
texture_width = 1024;
texture_height = 1024;
dyn_resizing = FALSE;
if (config->npot_textures)
{
if (strstr (extensions, "_texture_rectangle"))
{
tex_target = GL_TEXTURE_RECTANGLE;
texture_width = scaled_max_width;
texture_height = scaled_max_height;
dyn_resizing = TRUE;
}
else if (strstr (extensions, "GL_ARB_texture_non_power_of_two"))
{
dyn_resizing = TRUE;
}
}
glEnable (GL_VERTEX_ARRAY);
glEnable (GL_TEXTURE_COORD_ARRAY);
vertices[0] = 0.0f;
vertices[1] = 0.0f;
vertices[2] = 1.0f;
vertices[3] = 0.0f;
vertices[4] = 1.0f;
vertices[5] = 1.0f;
vertices[6] = 0.0f;
vertices[7] = 1.0f;
glVertexPointer (2, GL_FLOAT, 0, vertices);
texcoords[0] = 0.0f;
texcoords[5] = 0.0f;
texcoords[6] = 0.0f;
texcoords[7] = 0.0f;
glTexCoordPointer (2, GL_FLOAT, 0, texcoords);
if (config->use_pbos)
{
glGenBuffers (1, &pbo);
glGenTextures (1, &texmap);
glBindTexture (tex_target, texmap);
glTexImage2D (tex_target,
0,
config->pbo_format == PBO_FMT_16 ? GL_RGB5_A1 : 4,
texture_width,
texture_height,
0,
GL_RGB,
GL_UNSIGNED_BYTE,
NULL);
glBindBuffer (GL_PIXEL_UNPACK_BUFFER, pbo);
glBufferData (GL_PIXEL_UNPACK_BUFFER,
texture_width * texture_height * 3,
NULL,
GL_STREAM_DRAW);
glBindBuffer (GL_PIXEL_UNPACK_BUFFER, 0);
}
else
{
glGenTextures (1, &texmap);
glBindTexture (tex_target, texmap);
glTexImage2D (tex_target,
0,
GL_RGB5_A1,
texture_width,
texture_height,
0,
GL_BGRA,
GL_UNSIGNED_SHORT_1_5_5_5_REV,
NULL);
}
glEnable (GL_DITHER);
glDisable (GL_POLYGON_SMOOTH);
glShadeModel (GL_FLAT);
glPolygonMode (GL_FRONT, GL_FILL);
glEnable (GL_CULL_FACE);
glCullFace (GL_BACK);
glClearColor (0.0, 0.0, 0.0, 0.0);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glDisable (GL_BLEND);
glDisable (GL_DEPTH_TEST);
glDisable (GL_TEXTURE_2D);
glDisable (GL_TEXTURE_RECTANGLE);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glOrtho (0.0, 1.0, 0.0, 1.0, -1, 1);
gl_unlock ();
return;
}
