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osmesa: add new OSMesaCreateContextAttribs function

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This allows specifying a GL profile and version so one can get a core-
profile context.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
This commit is contained in:
Brian Paul
2015-12-15 15:33:54 -07:00
parent c2c0983215
commit a34e7612dc
3 changed files with 144 additions and 3 deletions
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100
src/mesa/drivers/osmesa/osmesa.c
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@@ -644,11 +644,101 @@ OSMesaCreateContext( GLenum format, OSMesaContext sharelist )
GLAPI OSMesaContext GLAPIENTRY
OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
GLint accumBits, OSMesaContext sharelist )
{
int attribs[100], n = 0;
attribs[n++] = OSMESA_FORMAT;
attribs[n++] = format;
attribs[n++] = OSMESA_DEPTH_BITS;
attribs[n++] = depthBits;
attribs[n++] = OSMESA_STENCIL_BITS;
attribs[n++] = stencilBits;
attribs[n++] = OSMESA_ACCUM_BITS;
attribs[n++] = accumBits;
attribs[n++] = 0;
return OSMesaCreateContextAttribs(attribs, sharelist);
}
/**
* New in Mesa 11.2
*
* Create context with attribute list.
*/
GLAPI OSMesaContext GLAPIENTRY
OSMesaCreateContextAttribs(const int *attribList, OSMesaContext sharelist)
{
OSMesaContext osmesa;
struct dd_function_table functions;
GLint rind, gind, bind, aind;
GLint redBits = 0, greenBits = 0, blueBits = 0, alphaBits =0;
GLenum format = OSMESA_RGBA;
GLint depthBits = 0, stencilBits = 0, accumBits = 0;
int profile = OSMESA_COMPAT_PROFILE, version_major = 1, version_minor = 0;
gl_api api_profile = API_OPENGL_COMPAT;
int i;
for (i = 0; attribList[i]; i += 2) {
switch (attribList[i]) {
case OSMESA_FORMAT:
format = attribList[i+1];
switch (format) {
case OSMESA_COLOR_INDEX:
case OSMESA_RGBA:
case OSMESA_BGRA:
case OSMESA_ARGB:
case OSMESA_RGB:
case OSMESA_BGR:
case OSMESA_RGB_565:
/* legal */
break;
default:
return NULL;
}
break;
case OSMESA_DEPTH_BITS:
depthBits = attribList[i+1];
if (depthBits < 0)
return NULL;
break;
case OSMESA_STENCIL_BITS:
stencilBits = attribList[i+1];
if (stencilBits < 0)
return NULL;
break;
case OSMESA_ACCUM_BITS:
accumBits = attribList[i+1];
if (accumBits < 0)
return NULL;
break;
case OSMESA_PROFILE:
profile = attribList[i+1];
if (profile == OSMESA_COMPAT_PROFILE)
api_profile = API_OPENGL_COMPAT;
else if (profile == OSMESA_CORE_PROFILE)
api_profile = API_OPENGL_CORE;
else
return NULL;
break;
case OSMESA_CONTEXT_MAJOR_VERSION:
version_major = attribList[i+1];
if (version_major < 1)
return NULL;
break;
case OSMESA_CONTEXT_MINOR_VERSION:
version_minor = attribList[i+1];
if (version_minor < 0)
return NULL;
break;
case 0:
/* end of list */
break;
default:
fprintf(stderr, "Bad attribute in OSMesaCreateContextAttribs()\n");
return NULL;
}
}
rind = gind = bind = aind = 0;
if (format==OSMESA_RGBA) {
@@ -742,7 +832,7 @@ OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
functions.UpdateState = osmesa_update_state;
if (!_mesa_initialize_context(&osmesa->mesa,
API_OPENGL_COMPAT,
api_profile,
osmesa->gl_visual,
sharelist ? &sharelist->mesa
: (struct gl_context *) NULL,
@@ -819,6 +909,13 @@ OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
_mesa_compute_version(ctx);
if (ctx->Version < version_major * 10 + version_minor) {
_mesa_destroy_visual(osmesa->gl_visual);
_mesa_free_context_data(ctx);
free(osmesa);
return NULL;
}
/* Exec table initialization requires the version to be computed */
_mesa_initialize_dispatch_tables(ctx);
_mesa_initialize_vbo_vtxfmt(ctx);
@@ -1121,6 +1218,7 @@ struct name_function
static struct name_function functions[] = {
{ "OSMesaCreateContext", (OSMESAproc) OSMesaCreateContext },
{ "OSMesaCreateContextExt", (OSMESAproc) OSMesaCreateContextExt },
{ "OSMesaCreateContextAttribs", (OSMESAproc) OSMesaCreateContextAttribs },
{ "OSMesaDestroyContext", (OSMESAproc) OSMesaDestroyContext },
{ "OSMesaMakeCurrent", (OSMESAproc) OSMesaMakeCurrent },
{ "OSMesaGetCurrentContext", (OSMESAproc) OSMesaGetCurrentContext },