+
+ atlas->glyphs = malloc(atlas->numBitmaps *
sizeof(atlas->glyphs[0]));
+ if (!atlas->glyphs) {
+ /* give up */
+ atlas->incomplete = true;
+ return;
+ }
+
+ /* Loop over the display lists. They should all contain a single
glBitmap
+ * call. If not, bail out. Also, compute the position and sizes
of each
+ * bitmap in the atlas to determine the texture atlas size.
+ */
+ for (i = 0; i < atlas->numBitmaps; i++) {
+ const struct gl_display_list *list = _mesa_lookup_list(ctx,
listBase + i);
+ const Node *n;
+ struct gl_bitmap_glyph *g = &atlas->glyphs[i];
+ unsigned bitmap_width, bitmap_height;
+ float bitmap_xmove, bitmap_ymove, bitmap_xorig, bitmap_yorig;
+
+ if (!list || is_empty_list(list)) {
+ /* stop here */
+ atlas->numBitmaps = i;
+ break;
+ }
+
+ if (!is_bitmap_list(list)) {
+ /* This list does not contain exactly one glBitmap command.
Give up. */
+ atlas->incomplete = true;
+ return;
+ }
+
+ /* get bitmap info from the display list command */
+ n = list->Head;
+ assert(n[0].opcode == OPCODE_BITMAP);
+ bitmap_width = n[1].i;
+ bitmap_height = n[2].i;
+ bitmap_xorig = n[3].f;
+ bitmap_yorig = n[4].f;
+ bitmap_xmove = n[5].f;
+ bitmap_ymove = n[6].f;
+
+ if (xpos + bitmap_width > atlas->texWidth) {
+ /* advance to the next row of the texture */
+ xpos = 0;
+ ypos += row_height;
+ row_height = 0;
+ }
+
+ /* save the bitmap's position in the atlas */
+ g->x = xpos;
+ g->y = ypos;
+ g->w = bitmap_width;
+ g->h = bitmap_height;
+ g->xorig = bitmap_xorig;
+ g->yorig = bitmap_yorig;
+ g->xmove = bitmap_xmove;
+ g->ymove = bitmap_ymove;
+
+ xpos += bitmap_width;
+
+ /* keep track of tallest bitmap in the row */
+ row_height = MAX2(row_height, bitmap_height);
+ }
+
+ /* Now we know the texture height */
+ atlas->texHeight = ypos + row_height;
+
+ if (atlas->texHeight == 0) {
+ /* no glyphs found, give up */
+ goto fail;
+ }
+ else if (atlas->texHeight > ctx->Const.MaxTextureRectSize) {
+ /* too large, give up */
+ goto fail;
+ }
+
+ /* Create atlas texture (texture ID is irrelevant) */
+ atlas->texObj = ctx->Driver.NewTextureObject(ctx, 999,
GL_TEXTURE_RECTANGLE);
+ if (!atlas->texObj) {
+ goto out_of_memory;
+ }
+
+ atlas->texObj->Sampler.MinFilter = GL_NEAREST;
+ atlas->texObj->Sampler.MagFilter = GL_NEAREST;
+ atlas->texObj->MaxLevel = 0;
+ atlas->texObj->Immutable = GL_TRUE;
+
+ atlas->texImage = _mesa_get_tex_image(ctx, atlas->texObj,
+ GL_TEXTURE_RECTANGLE, 0);
+ if (!atlas->texImage) {
+ goto out_of_memory;
+ }
+
+ _mesa_init_teximage_fields(ctx, atlas->texImage,
+ atlas->texWidth, atlas->texHeight, 1, 0,
+ GL_ALPHA, MESA_FORMAT_A_UNORM8);
+
+ /* alloc image storage */
+ if (!ctx->Driver.AllocTextureImageBuffer(ctx, atlas->texImage)) {
+ goto out_of_memory;
+ }
+
+ /* map teximage, load with bitmap glyphs */
+ ctx->Driver.MapTextureImage(ctx, atlas->texImage, 0,
+ 0, 0, atlas->texWidth, atlas->texHeight,
+ GL_MAP_WRITE_BIT, &map, &map_stride);
+ if (!map) {
+ goto out_of_memory;
+ }
+
+ /* Background/clear pixels are 0xff, foreground/set pixels are
0x0 */
+ memset(map, 0xff, map_stride * atlas->texHeight);
+
+ for (i = 0; i < atlas->numBitmaps; i++) {
+ const struct gl_display_list *list = _mesa_lookup_list(ctx,
listBase + i);
+ const Node *n = list->Head;
+
+ assert(n[0].opcode == OPCODE_BITMAP ||
+ n[0].opcode == OPCODE_END_OF_LIST);
+
+ if (n[0].opcode == OPCODE_BITMAP) {
+ unsigned bitmap_width = n[1].i;
+ unsigned bitmap_height = n[2].i;
+ unsigned xpos = atlas->glyphs[i].x;
+ unsigned ypos = atlas->glyphs[i].y;
+ const void *bitmap_image = get_pointer(&n[7]);
+
+ assert(atlas->glyphs[i].w == bitmap_width);
+ assert(atlas->glyphs[i].h == bitmap_height);
+
+ /* put the bitmap image into the texture image */
+ _mesa_expand_bitmap(bitmap_width, bitmap_height,
+ &ctx->DefaultPacking, bitmap_image,
+ map + map_stride * ypos + xpos, /* dest
addr */
+ map_stride, 0x0);
+ }
+ }
+
+ ctx->Driver.UnmapTextureImage(ctx, atlas->texImage, 0);
+
+ atlas->complete = true;
+
+ return;
+
+out_of_memory:
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "Display list bitmap atlas");
+fail:
+ if (atlas->texObj) {
+ ctx->Driver.DeleteTexture(ctx, atlas->texObj);
+ }
+ free(atlas->glyphs);
+ atlas->incomplete = true;
+}
+
+
+/**
* Allocate a gl_display_list object with an initial block of storage.
* \param count how many display list nodes/tokens to allocate
*/
@@ -856,6 +1112,30 @@ _mesa_delete_list(struct gl_context *ctx, struct
gl_display_list *dlist)
/**
+ * Called by _mesa_HashWalk() to check if a display list which is being
+ * deleted belongs to a bitmap texture atlas.
+ */
+static void
+check_atlas_for_deleted_list(GLuint atlas_id, void *data, void
*userData)
+{
+ struct gl_bitmap_atlas *atlas = (struct gl_bitmap_atlas *) data;
+ GLuint list_id = *((GLuint *) userData); /* the list being
deleted */
+
+ /* See if the list_id falls in the range contained in this texture
atlas */
+ if (atlas->complete &&
+ list_id >= atlas_id &&
+ list_id < atlas_id + atlas->numBitmaps) {
+ /* Mark the atlas as incomplete so it doesn't get used. But
don't
+ * delete it yet since we don't want to try to recreate it in
the next
+ * glCallLists.
+ */
+ atlas->complete = false;
+ atlas->incomplete = true;
+ }
+}
+
+
+/**
* Destroy a display list and remove from hash table.
* \param list - display list number
*/
@@ -871,6 +1151,16 @@ destroy_list(struct gl_context *ctx, GLuint list)
if (!dlist)
return;
+ if (is_bitmap_list(dlist)) {
+ /* If we're destroying a simple glBitmap display list, there's a
+ * chance that we're destroying a bitmap image that's in a
texture
+ * atlas. Examine all atlases to see if that's the case.
There's
+ * usually few (if any) atlases so this isn't expensive.
+ */
+ _mesa_HashWalk(ctx->Shared->BitmapAtlas,
+ check_atlas_for_deleted_list, &list);
+ }
+
_mesa_delete_list(ctx, dlist);
_mesa_HashRemove(ctx->Shared->DisplayList, list);
}
@@ -8898,6 +9188,18 @@ _mesa_DeleteLists(GLuint list, GLsizei range)
for (i = list; i < list + range; i++) {
destroy_list(ctx, i);
}
+
+ if (range > 1) {
+ /* We may be deleting a set of bitmap lists. See if there's a
+ * bitmap atlas to free.
+ */
+ struct gl_bitmap_atlas *atlas = lookup_bitmap_atlas(ctx, list);
+ if (atlas) {
+ _mesa_delete_bitmap_atlas(ctx, atlas);
+ _mesa_HashRemove(ctx->Shared->BitmapAtlas, list);
+ }
+ }
+
