GLAPI OSMesaContext GLAPIENTRY
OSMesaGetCurrentContext(void)
{
struct st_api *stapi = get_st_api();
struct st_context_iface *st = stapi->get_current(stapi);
return st ? (OSMesaContext) st->st_manager_private : NULL;
}
/**
* Bind an OSMesaContext to an image buffer. The image buffer is just a
* block of memory which the client provides. Its size must be at least
* as large as width*height*pixelSize. Its address should be a multiple
* of 4 if using RGBA mode.
*
* By default, image data is stored in the order of glDrawPixels: row-major
* order with the lower-left image pixel stored in the first array position
* (ie. bottom-to-top).
*
* If the context's viewport hasn't been initialized yet, it will now be
* initialized to (0,0,width,height).
*
* Input: osmesa - the rendering context
* buffer - the image buffer memory
* type - data type for pixel components
* GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT
* or GL_FLOAT.
* width, height - size of image buffer in pixels, at least 1
* Return: GL_TRUE if success, GL_FALSE if error because of invalid osmesa,
* invalid type, invalid size, etc.
*/
GLAPI GLboolean GLAPIENTRY
OSMesaMakeCurrent(OSMesaContext osmesa, void *buffer, GLenum type,
GLsizei width, GLsizei height)
{
struct st_api *stapi = get_st_api();
struct osmesa_buffer *osbuffer;
enum pipe_format color_format;
if (osmesa->format == OSMESA_RGB_565 && type != GL_UNSIGNED_SHORT_5_6_5) {
return GL_FALSE;
}
if (width < 1 || height < 1) {
return GL_FALSE;
}
color_format = osmesa_choose_format(osmesa->format, type);
if (color_format == PIPE_FORMAT_NONE) {
fprintf(stderr, "OSMesaMakeCurrent(unsupported format/type)\n");
return GL_FALSE;
}
/* See if we already have a buffer that uses these pixel formats */
osbuffer = osmesa_find_buffer(color_format,
osmesa->depth_stencil_format,
osmesa->accum_format);
if (!osbuffer) {
/* Existing buffer found, create new buffer */
osbuffer = osmesa_create_buffer(color_format,
osmesa->depth_stencil_format,
osmesa->accum_format);
}
osbuffer->width = width;
osbuffer->height = height;
osbuffer->map = buffer;
/* XXX unused for now */
(void) osmesa_destroy_buffer;
osmesa->current_buffer = osbuffer;
osmesa->type = type;
stapi->make_current(stapi, osmesa->stctx, osbuffer->stfb, osbuffer->stfb);
return GL_TRUE;
}
/**
* Bind an OSMesaContext to an image buffer. The image buffer is just a
* block of memory which the client provides. Its size must be at least
* as large as width*height*pixelSize. Its address should be a multiple
* of 4 if using RGBA mode.
*
* By default, image data is stored in the order of glDrawPixels: row-major
* order with the lower-left image pixel stored in the first array position
* (ie. bottom-to-top).
*
* If the context's viewport hasn't been initialized yet, it will now be
* initialized to (0,0,width,height).
*
* Input: osmesa - the rendering context
* buffer - the image buffer memory
* type - data type for pixel components
* GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT
* or GL_FLOAT.
* width, height - size of image buffer in pixels, at least 1
* Return: GL_TRUE if success, GL_FALSE if error because of invalid osmesa,
* invalid type, invalid size, etc.
*/
GLAPI GLboolean GLAPIENTRY
OSMesaMakeCurrent(OSMesaContext osmesa, void *buffer, GLenum type,
GLsizei width, GLsizei height)
{
struct st_api *stapi = get_st_api();
struct osmesa_buffer *osbuffer;
enum pipe_format color_format;
if (!osmesa || !buffer || width < 1 || height < 1) {
return GL_FALSE;
}
if (osmesa->format == OSMESA_RGB_565 && type != GL_UNSIGNED_SHORT_5_6_5) {
return GL_FALSE;
}
color_format = osmesa_choose_format(osmesa->format, type);
if (color_format == PIPE_FORMAT_NONE) {
fprintf(stderr, "OSMesaMakeCurrent(unsupported format/type)\n");
return GL_FALSE;
}
/* See if we already have a buffer that uses these pixel formats */
osbuffer = osmesa_find_buffer(color_format,
osmesa->depth_stencil_format,
osmesa->accum_format, width, height);
if (!osbuffer) {
/* Existing buffer found, create new buffer */
osbuffer = osmesa_create_buffer(color_format,
osmesa->depth_stencil_format,
osmesa->accum_format);
}
osbuffer->width = width;
osbuffer->height = height;
osbuffer->map = buffer;
/* XXX unused for now */
(void) osmesa_destroy_buffer;
osmesa->current_buffer = osbuffer;
osmesa->type = type;
stapi->make_current(stapi, osmesa->stctx, osbuffer->stfb, osbuffer->stfb);
if (!osmesa->ever_used) {
/* one-time init, just postprocessing for now */
boolean any_pp_enabled = FALSE;
unsigned i;
for (i = 0; i < ARRAY_SIZE(osmesa->pp_enabled); i++) {
if (osmesa->pp_enabled[i]) {
any_pp_enabled = TRUE;
break;
}
}
if (any_pp_enabled) {
osmesa->pp = pp_init(osmesa->stctx->pipe,
osmesa->pp_enabled,
osmesa->stctx->cso_context);
pp_init_fbos(osmesa->pp, width, height);
}
osmesa->ever_used = TRUE;
}
return GL_TRUE;
}
/**
* New in Mesa 11.2
*
* Create context with attribute list.
*/
GLAPI OSMesaContext GLAPIENTRY
OSMesaCreateContextAttribs(const int *attribList, OSMesaContext sharelist)
{
OSMesaContext osmesa;
struct st_context_iface *st_shared;
enum st_context_error st_error = 0;
struct st_context_attribs attribs;
struct st_api *stapi = get_st_api();
GLenum format = GL_RGBA;
int depthBits = 0, stencilBits = 0, accumBits = 0;
int profile = OSMESA_COMPAT_PROFILE, version_major = 1, version_minor = 0;
int i;
if (sharelist) {
st_shared = sharelist->stctx;
}
else {
st_shared = NULL;
}
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_CORE_PROFILE &&
profile != OSMESA_COMPAT_PROFILE)
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;
}
}
osmesa = (OSMesaContext) CALLOC_STRUCT(osmesa_context);
if (!osmesa)
return NULL;
/* Choose depth/stencil/accum buffer formats */
if (accumBits > 0) {
osmesa->accum_format = PIPE_FORMAT_R16G16B16A16_SNORM;
}
if (depthBits > 0 && stencilBits > 0) {
osmesa->depth_stencil_format = PIPE_FORMAT_Z24_UNORM_S8_UINT;
}
else if (stencilBits > 0) {
osmesa->depth_stencil_format = PIPE_FORMAT_S8_UINT;
}
else if (depthBits >= 24) {
osmesa->depth_stencil_format = PIPE_FORMAT_Z24X8_UNORM;
}
else if (depthBits >= 16) {
osmesa->depth_stencil_format = PIPE_FORMAT_Z16_UNORM;
}
/*
* Create the rendering context
*/
memset(&attribs, 0, sizeof(attribs));
attribs.profile = (profile == OSMESA_CORE_PROFILE)
? ST_PROFILE_OPENGL_CORE : ST_PROFILE_DEFAULT;
attribs.major = version_major;
attribs.minor = version_minor;
attribs.flags = 0; /* ST_CONTEXT_FLAG_x */
attribs.options.force_glsl_extensions_warn = FALSE;
attribs.options.disable_blend_func_extended = FALSE;
attribs.options.disable_glsl_line_continuations = FALSE;
attribs.options.disable_shader_bit_encoding = FALSE;
attribs.options.force_s3tc_enable = FALSE;
attribs.options.force_glsl_version = 0;
osmesa_init_st_visual(&attribs.visual,
PIPE_FORMAT_R8G8B8A8_UNORM,
osmesa->depth_stencil_format,
osmesa->accum_format);
osmesa->stctx = stapi->create_context(stapi, get_st_manager(),
&attribs, &st_error, st_shared);
if (!osmesa->stctx) {
FREE(osmesa);
return NULL;
}
osmesa->stctx->st_manager_private = osmesa;
osmesa->format = format;
osmesa->user_row_length = 0;
osmesa->y_up = GL_TRUE;
return osmesa;
}
/**
* New in Mesa 3.5
*
* Create context and specify size of ancillary buffers.
*/
GLAPI OSMesaContext GLAPIENTRY
OSMesaCreateContextExt(GLenum format, GLint depthBits, GLint stencilBits,
GLint accumBits, OSMesaContext sharelist)
{
OSMesaContext osmesa;
struct st_context_iface *st_shared;
enum st_context_error st_error = 0;
struct st_context_attribs attribs;
struct st_api *stapi = get_st_api();
if (sharelist) {
st_shared = sharelist->stctx;
}
else {
st_shared = NULL;
}
osmesa = (OSMesaContext) CALLOC_STRUCT(osmesa_context);
if (!osmesa)
return NULL;
/* Choose depth/stencil/accum buffer formats */
if (accumBits > 0) {
osmesa->accum_format = PIPE_FORMAT_R16G16B16A16_SNORM;
}
if (depthBits > 0 && stencilBits > 0) {
osmesa->depth_stencil_format = PIPE_FORMAT_Z24_UNORM_S8_UINT;
}
else if (stencilBits > 0) {
osmesa->depth_stencil_format = PIPE_FORMAT_S8_UINT;
}
else if (depthBits >= 24) {
osmesa->depth_stencil_format = PIPE_FORMAT_Z24X8_UNORM;
}
else if (depthBits >= 16) {
osmesa->depth_stencil_format = PIPE_FORMAT_Z16_UNORM;
}
/*
* Create the rendering context
*/
attribs.profile = ST_PROFILE_DEFAULT;
attribs.major = 2;
attribs.minor = 1;
attribs.flags = 0; /* ST_CONTEXT_FLAG_x */
attribs.options.force_glsl_extensions_warn = FALSE;
attribs.options.disable_blend_func_extended = FALSE;
attribs.options.disable_glsl_line_continuations = FALSE;
attribs.options.disable_shader_bit_encoding = FALSE;
attribs.options.force_s3tc_enable = FALSE;
attribs.options.force_glsl_version = 0;
osmesa_init_st_visual(&attribs.visual,
PIPE_FORMAT_R8G8B8A8_UNORM,
osmesa->depth_stencil_format,
osmesa->accum_format);
osmesa->stctx = stapi->create_context(stapi, get_st_manager(),
&attribs, &st_error, st_shared);
if (!osmesa->stctx) {
FREE(osmesa);
return NULL;
}
osmesa->stctx->st_manager_private = osmesa;
osmesa->format = format;
osmesa->user_row_length = 0;
osmesa->y_up = GL_TRUE;
return osmesa;
}
static struct st_api *
guess_gl_api(enum st_profile_type profile)
{
return get_st_api(ST_API_OPENGL);
}
