/**
* Bind a pipe surface to a texture object. After the call,
* the texture object is marked dirty and will be (re-)validated.
*
* If this is the first surface bound, the texture object is said to
* switch from normal to surface based. It will be cleared first in
* this case.
*
* \param ps pipe surface to be unbound
* \param target texture target
* \param level image level
* \param format internal format of the texture
*/
int
st_bind_texture_surface(struct pipe_surface *ps, int target, int level,
enum pipe_format format)
{
GET_CURRENT_CONTEXT(ctx);
const GLuint unit = ctx->Texture.CurrentUnit;
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
struct st_texture_object *stObj;
struct st_texture_image *stImage;
GLenum internalFormat;
switch (target) {
case ST_TEXTURE_2D:
target = GL_TEXTURE_2D;
break;
case ST_TEXTURE_RECT:
target = GL_TEXTURE_RECTANGLE_ARB;
break;
default:
return 0;
}
/* map pipe format to base format for now */
if (pf_get_component_bits(format, PIPE_FORMAT_COMP_A) > 0)
internalFormat = GL_RGBA;
else
internalFormat = GL_RGB;
texObj = _mesa_select_tex_object(ctx, texUnit, target);
_mesa_lock_texture(ctx, texObj);
stObj = st_texture_object(texObj);
/* switch to surface based */
if (!stObj->surface_based) {
_mesa_clear_texture_object(ctx, texObj);
stObj->surface_based = GL_TRUE;
}
texImage = _mesa_get_tex_image(ctx, texObj, target, level);
stImage = st_texture_image(texImage);
_mesa_init_teximage_fields(ctx, target, texImage,
ps->width, ps->height, 1, 0, internalFormat);
texImage->TexFormat = st_ChooseTextureFormat(ctx, internalFormat,
GL_RGBA, GL_UNSIGNED_BYTE);
_mesa_set_fetch_functions(texImage, 2);
pipe_texture_reference(&stImage->pt, ps->texture);
_mesa_dirty_texobj(ctx, texObj, GL_TRUE);
_mesa_unlock_texture(ctx, texObj);
return 1;
}
static boolean
st_context_teximage(struct st_context_iface *stctxi,
enum st_texture_type target,
int level, enum pipe_format internal_format,
struct pipe_resource *tex, boolean mipmap)
{
struct st_context *st = (struct st_context *) stctxi;
struct gl_context *ctx = st->ctx;
struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
struct gl_texture_object *texObj;
struct gl_texture_image *texImage;
struct st_texture_object *stObj;
struct st_texture_image *stImage;
GLenum internalFormat;
GLuint width, height, depth;
switch (target) {
case ST_TEXTURE_1D:
target = GL_TEXTURE_1D;
break;
case ST_TEXTURE_2D:
target = GL_TEXTURE_2D;
break;
case ST_TEXTURE_3D:
target = GL_TEXTURE_3D;
break;
case ST_TEXTURE_RECT:
target = GL_TEXTURE_RECTANGLE_ARB;
break;
default:
return FALSE;
break;
}
texObj = _mesa_select_tex_object(ctx, texUnit, target);
_mesa_lock_texture(ctx, texObj);
stObj = st_texture_object(texObj);
/* switch to surface based */
if (!stObj->surface_based) {
_mesa_clear_texture_object(ctx, texObj);
stObj->surface_based = GL_TRUE;
}
texImage = _mesa_get_tex_image(ctx, texObj, target, level);
stImage = st_texture_image(texImage);
if (tex) {
gl_format texFormat;
/*
* XXX When internal_format and tex->format differ, st_finalize_texture
* needs to allocate a new texture with internal_format and copy the
* texture here into the new one. It will result in surface_copy being
* called on surfaces whose formats differ.
*
* To avoid that, internal_format is (wrongly) ignored here. A sane fix
* is to use a sampler view.
*/
if (!st_sampler_compat_formats(tex->format, internal_format))
internal_format = tex->format;
if (util_format_get_component_bits(internal_format,
UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
internalFormat = GL_RGBA;
else
internalFormat = GL_RGB;
texFormat = st_ChooseTextureFormat(ctx, internalFormat,
GL_BGRA, GL_UNSIGNED_BYTE);
_mesa_init_teximage_fields(ctx, texImage,
tex->width0, tex->height0, 1, 0,
internalFormat, texFormat);
width = tex->width0;
height = tex->height0;
depth = tex->depth0;
/* grow the image size until we hit level = 0 */
while (level > 0) {
if (width != 1)
width <<= 1;
if (height != 1)
height <<= 1;
if (depth != 1)
depth <<= 1;
level--;
}
}
else {
_mesa_clear_texture_image(ctx, texImage);
width = height = depth = 0;
}
pipe_resource_reference(&stImage->pt, tex);
stObj->width0 = width;
stObj->height0 = height;
stObj->depth0 = depth;
_mesa_dirty_texobj(ctx, texObj, GL_TRUE);
_mesa_unlock_texture(ctx, texObj);
return TRUE;
}
/**
* Make texture containing an image for glDrawPixels image.
* If 'pixels' is NULL, leave the texture image data undefined.
*/
static struct pipe_texture *
make_texture(struct st_context *st,
GLsizei width, GLsizei height, GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels)
{
GLcontext *ctx = st->ctx;
struct pipe_context *pipe = st->pipe;
struct pipe_screen *screen = pipe->screen;
const struct gl_texture_format *mformat;
struct pipe_texture *pt;
enum pipe_format pipeFormat;
GLuint cpp;
GLenum baseFormat;
baseFormat = _mesa_base_format(format);
mformat = st_ChooseTextureFormat(ctx, baseFormat, format, type);
assert(mformat);
pipeFormat = st_mesa_format_to_pipe_format(mformat->MesaFormat);
assert(pipeFormat);
cpp = st_sizeof_format(pipeFormat);
pixels = _mesa_map_drawpix_pbo(ctx, unpack, pixels);
if (!pixels)
return NULL;
pt = st_texture_create(st, PIPE_TEXTURE_2D, pipeFormat, 0, width, height, 1,
PIPE_TEXTURE_USAGE_SAMPLER);
if (!pt) {
_mesa_unmap_drawpix_pbo(ctx, unpack);
return NULL;
}
{
struct pipe_transfer *transfer;
static const GLuint dstImageOffsets = 0;
GLboolean success;
GLubyte *dest;
const GLbitfield imageTransferStateSave = ctx->_ImageTransferState;
/* we'll do pixel transfer in a fragment shader */
ctx->_ImageTransferState = 0x0;
transfer = st_no_flush_get_tex_transfer(st, pt, 0, 0, 0,
PIPE_TRANSFER_WRITE, 0, 0,
width, height);
/* map texture transfer */
dest = screen->transfer_map(screen, transfer);
/* Put image into texture transfer.
* Note that the image is actually going to be upside down in
* the texture. We deal with that with texcoords.
*/
success = mformat->StoreImage(ctx, 2, /* dims */
baseFormat, /* baseInternalFormat */
mformat, /* gl_texture_format */
dest, /* dest */
0, 0, 0, /* dstX/Y/Zoffset */
transfer->stride, /* dstRowStride, bytes */
&dstImageOffsets, /* dstImageOffsets */
width, height, 1, /* size */
format, type, /* src format/type */
pixels, /* data source */
unpack);
/* unmap */
screen->transfer_unmap(screen, transfer);
screen->tex_transfer_destroy(transfer);
assert(success);
/* restore */
ctx->_ImageTransferState = imageTransferStateSave;
}
_mesa_unmap_drawpix_pbo(ctx, unpack);
return pt;
}
