/**
* 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;
}
