/**
* 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*sizeof(type). Its address should be a multiple
* of 4 if using RGBA mode.
*
* 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
* Normally, only GL_UNSIGNED_BYTE and GL_UNSIGNED_SHORT_5_6_5
* are supported. But if Mesa's been compiled with CHAN_BITS==16
* then type may be GL_UNSIGNED_SHORT or GL_UNSIGNED_BYTE. And if
* Mesa's been build with CHAN_BITS==32 then type may be GL_FLOAT,
* GL_UNSIGNED_SHORT or GL_UNSIGNED_BYTE.
* 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 buffer address, invalid type, width<1, height<1,
* width>internal limit or height>internal limit.
*/
GLAPI GLboolean GLAPIENTRY
OSMesaMakeCurrent( OSMesaContext osmesa, void *buffer, GLenum type,
GLsizei width, GLsizei height )
{
if (!osmesa || !buffer ||
width < 1 || height < 1 ||
width > MAX_WIDTH || height > MAX_HEIGHT) {
return GL_FALSE;
}
if (osmesa->format == OSMESA_RGB_565 && type != GL_UNSIGNED_SHORT_5_6_5) {
return GL_FALSE;
}
#if 0
if (!(type == GL_UNSIGNED_BYTE ||
(type == GL_UNSIGNED_SHORT && CHAN_BITS >= 16) ||
(type == GL_FLOAT && CHAN_BITS == 32))) {
/* i.e. is sizeof(type) * 8 > CHAN_BITS? */
return GL_FALSE;
}
#endif
osmesa_update_state( &osmesa->mesa, 0 );
/* Call this periodically to detect when the user has begun using
* GL rendering from multiple threads.
*/
_glapi_check_multithread();
/* Set renderbuffer fields. Set width/height = 0 to force
* osmesa_renderbuffer_storage() being called by _mesa_resize_framebuffer()
*/
osmesa->rb->Data = buffer;
osmesa->rb->DataType = type;
osmesa->rb->Width = osmesa->rb->Height = 0;
/* Set the framebuffer's size. This causes the
* osmesa_renderbuffer_storage() function to get called.
*/
_mesa_resize_framebuffer(&osmesa->mesa, osmesa->gl_buffer, width, height);
osmesa->gl_buffer->Initialized = GL_TRUE; /* XXX TEMPORARY? */
_mesa_make_current( &osmesa->mesa, osmesa->gl_buffer, osmesa->gl_buffer );
/* Remove renderbuffer attachment, then re-add. This installs the
* renderbuffer adaptor/wrapper if needed (for bpp conversion).
*/
_mesa_remove_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT);
_mesa_add_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT, osmesa->rb);
/* this updates the visual's red/green/blue/alphaBits fields */
_mesa_update_framebuffer_visual(osmesa->gl_buffer);
/* update the framebuffer size */
_mesa_resize_framebuffer(&osmesa->mesa, osmesa->gl_buffer, width, height);
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*sizeof(type). Its address should be a multiple
* of 4 if using RGBA mode.
*
* 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: ctx - the rendering context
* buffer - the image buffer memory
* type - data type for pixel components
* Normally, only GL_UNSIGNED_BYTE and GL_UNSIGNED_SHORT_5_6_5
* are supported. But if Mesa's been compiled with CHAN_BITS==16
* then type must be GL_UNSIGNED_SHORT. And if Mesa's been build
* with CHAN_BITS==32 then type must be 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 ctx,
* invalid buffer address, invalid type, width<1, height<1,
* width>internal limit or height>internal limit.
*/
GLAPI GLboolean GLAPIENTRY
OSMesaMakeCurrent( OSMesaContext ctx, void *buffer, GLenum type,
GLsizei width, GLsizei height )
{
if (!ctx || !buffer ||
width < 1 || height < 1 ||
width > MAX_WIDTH || height > MAX_HEIGHT) {
return GL_FALSE;
}
if (ctx->format == OSMESA_RGB_565) {
if (type != GL_UNSIGNED_SHORT_5_6_5)
return GL_FALSE;
}
else if (type != CHAN_TYPE) {
return GL_FALSE;
}
/* Need to set these before calling _mesa_make_current() since the first
* time the context is bound, _mesa_make_current() will call our
* get_buffer_size() function to initialize the viewport. These are the
* values returned by get_buffer_size():
*/
ctx->buffer = buffer;
ctx->width = width;
ctx->height = height;
osmesa_update_state( &ctx->mesa, 0 );
/* Call this periodically to detect when the user has begun using
* GL rendering from multiple threads.
*/
_glapi_check_multithread();
_mesa_make_current( &ctx->mesa, ctx->gl_buffer, ctx->gl_buffer );
if (ctx->userRowLength)
ctx->rowlength = ctx->userRowLength;
else
ctx->rowlength = width;
compute_row_addresses( ctx );
/* this will make ensure we recognize the new buffer size */
_mesa_resize_framebuffer(&ctx->mesa, ctx->gl_buffer, width, height);
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*sizeof(type). Its address should be a multiple
* of 4 if using RGBA mode.
*
* 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
* Normally, only GL_UNSIGNED_BYTE and GL_UNSIGNED_SHORT_5_6_5
* are supported. But if Mesa's been compiled with CHAN_BITS==16
* then type may be GL_UNSIGNED_SHORT or GL_UNSIGNED_BYTE. And if
* Mesa's been build with CHAN_BITS==32 then type may be GL_FLOAT,
* GL_UNSIGNED_SHORT or GL_UNSIGNED_BYTE.
* 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 buffer address, invalid type, width<1, height<1,
* width>internal limit or height>internal limit.
*/
GLAPI GLboolean GLAPIENTRY
OSMesaMakeCurrent( OSMesaContext osmesa, void *buffer, GLenum type,
GLsizei width, GLsizei height )
{
if (!osmesa || !buffer ||
width < 1 || height < 1 ||
width > SWRAST_MAX_WIDTH || height > SWRAST_MAX_HEIGHT) {
return GL_FALSE;
}
if (osmesa->format == OSMESA_RGB_565 && type != GL_UNSIGNED_SHORT_5_6_5) {
return GL_FALSE;
}
#if 0
if (!(type == GL_UNSIGNED_BYTE ||
(type == GL_UNSIGNED_SHORT && CHAN_BITS >= 16) ||
(type == GL_FLOAT && CHAN_BITS == 32))) {
/* i.e. is sizeof(type) * 8 > CHAN_BITS? */
return GL_FALSE;
}
#endif
osmesa_update_state( &osmesa->mesa, 0 );
/* Call this periodically to detect when the user has begun using
* GL rendering from multiple threads.
*/
_glapi_check_multithread();
/* Create a front/left color buffer which wraps the user-provided buffer.
* There is no back color buffer.
* If the user tries to use a 8, 16 or 32-bit/channel buffer that
* doesn't match what Mesa was compiled for (CHAN_BITS) the
* _mesa_add_renderbuffer() function will create a "wrapper" renderbuffer
* that converts rendering from CHAN_BITS to the user-requested channel
* size.
*/
if (!osmesa->srb) {
osmesa->srb = new_osmesa_renderbuffer(&osmesa->mesa, osmesa->format, type);
_mesa_remove_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT);
_mesa_add_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT,
&osmesa->srb->Base);
assert(osmesa->srb->Base.RefCount == 2);
}
osmesa->DataType = type;
/* Set renderbuffer fields. Set width/height = 0 to force
* osmesa_renderbuffer_storage() being called by _mesa_resize_framebuffer()
*/
osmesa->srb->Buffer = buffer;
osmesa->srb->Base.Width = osmesa->srb->Base.Height = 0;
/* Set the framebuffer's size. This causes the
* osmesa_renderbuffer_storage() function to get called.
*/
_mesa_resize_framebuffer(&osmesa->mesa, osmesa->gl_buffer, width, height);
osmesa->gl_buffer->Initialized = GL_TRUE; /* XXX TEMPORARY? */
_mesa_make_current( &osmesa->mesa, osmesa->gl_buffer, osmesa->gl_buffer );
/* Remove renderbuffer attachment, then re-add. This installs the
* renderbuffer adaptor/wrapper if needed (for bpp conversion).
*/
_mesa_remove_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT);
_mesa_add_renderbuffer(osmesa->gl_buffer, BUFFER_FRONT_LEFT,
&osmesa->srb->Base);
/* this updates the visual's red/green/blue/alphaBits fields */
_mesa_update_framebuffer_visual(&osmesa->mesa, osmesa->gl_buffer);
/* update the framebuffer size */
_mesa_resize_framebuffer(&osmesa->mesa, osmesa->gl_buffer, width, height);
return GL_TRUE;
}
static void
osmesa_update_state_wrapper(struct gl_context *ctx)
{
osmesa_update_state(ctx, ctx->NewState);
}