diff options
Diffstat (limited to 'xorg-server/glamor/glamor_font.c')
| -rw-r--r-- | xorg-server/glamor/glamor_font.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/xorg-server/glamor/glamor_font.c b/xorg-server/glamor/glamor_font.c new file mode 100644 index 000000000..47dfe2a69 --- /dev/null +++ b/xorg-server/glamor/glamor_font.c @@ -0,0 +1,186 @@ +/* + * Copyright © 2014 Keith Packard + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +#include "glamor_priv.h" +#include "glamor_font.h" +#include <dixfontstr.h> + +static int glamor_font_generation; +static int glamor_font_private_index; +static int glamor_font_screen_count; + +glamor_font_t * +glamor_font_get(ScreenPtr screen, FontPtr font) +{ + glamor_screen_private *glamor_priv = glamor_get_screen_private(screen); + + glamor_font_t *privates; + glamor_font_t *glamor_font; + int overall_width, overall_height; + int num_rows; + int num_cols; + int glyph_width_pixels; + int glyph_width_bytes; + int glyph_height; + int row, col; + unsigned char c[2]; + CharInfoPtr glyph; + unsigned long count; + + + privates = FontGetPrivate(font, glamor_font_private_index); + if (!privates) { + privates = calloc(glamor_font_screen_count, sizeof (glamor_font_t)); + if (!privates) + return NULL; + FontSetPrivate(font, glamor_font_private_index, privates); + } + + glamor_font = &privates[screen->myNum]; + + if (glamor_font->realized) + return glamor_font; + + glamor_font->realized = TRUE; + + /* Figure out how many glyphs are in the font */ + num_cols = font->info.lastCol - font->info.firstCol + 1; + num_rows = font->info.lastRow - font->info.firstRow + 1; + + /* Figure out the size of each glyph */ + glyph_width_pixels = font->info.maxbounds.rightSideBearing - font->info.minbounds.leftSideBearing; + glyph_height = font->info.maxbounds.ascent + font->info.maxbounds.descent; + + glyph_width_bytes = (glyph_width_pixels + 7) >> 3; + + glamor_font->glyph_width_pixels = glyph_width_pixels; + glamor_font->glyph_width_bytes = glyph_width_bytes; + glamor_font->glyph_height = glyph_height; + + overall_width = glyph_width_bytes * num_cols; + overall_height = glyph_height * num_rows; + + /* Check whether the font has a default character */ + c[0] = font->info.lastRow + 1; + c[1] = font->info.lastCol + 1; + (*font->get_glyphs)(font, 1, c, TwoD16Bit, &count, &glyph); + + glamor_font->default_char = count ? glyph : NULL; + glamor_font->default_row = font->info.defaultCh >> 8; + glamor_font->default_col = font->info.defaultCh; + + glamor_priv = glamor_get_screen_private(screen); + glamor_get_context(glamor_priv); + + glGenTextures(1, &glamor_font->texture_id); + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, glamor_font->texture_id); + + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + + /* Allocate storage */ + glTexImage2D(GL_TEXTURE_2D, 0, GL_R8UI, overall_width, overall_height, + 0, GL_RED_INTEGER, GL_UNSIGNED_BYTE, NULL); + + glPixelStorei(GL_UNPACK_ALIGNMENT, 4); + + /* Paint all of the glyphs */ + for (row = 0; row < num_rows; row++) { + for (col = 0; col < num_cols; col++) { + c[0] = row + font->info.firstRow; + c[1] = col + font->info.firstCol; + + (*font->get_glyphs)(font, 1, c, TwoD16Bit, &count, &glyph); + + if (count) + glTexSubImage2D(GL_TEXTURE_2D, 0, col * glyph_width_bytes, row * glyph_height, + GLYPHWIDTHBYTES(glyph), GLYPHHEIGHTPIXELS(glyph), + GL_RED_INTEGER, GL_UNSIGNED_BYTE, glyph->bits); + } + } + + glamor_put_context(glamor_priv); + + return glamor_font; +} + +static Bool +glamor_realize_font(ScreenPtr screen, FontPtr font) +{ + return TRUE; +} + +static Bool +glamor_unrealize_font(ScreenPtr screen, FontPtr font) +{ + glamor_screen_private *glamor_priv; + glamor_font_t *privates = FontGetPrivate(font, glamor_font_private_index); + glamor_font_t *glamor_font; + int s; + + if (!privates) + return TRUE; + + glamor_font = &privates[screen->myNum]; + + if (!glamor_font->realized) + return TRUE; + + /* Unrealize the font, freeing the allocated texture */ + glamor_font->realized = FALSE; + + glamor_priv = glamor_get_screen_private(screen); + glamor_get_context(glamor_priv); + glDeleteTextures(1, &glamor_font->texture_id); + glamor_put_context(glamor_priv); + + /* Check to see if all of the screens are done with this font + * and free the private when that happens + */ + for (s = 0; s < glamor_font_screen_count; s++) + if (privates[s].realized) + return TRUE; + + free(privates); + FontSetPrivate(font, glamor_font_private_index, NULL); + return TRUE; +} + +Bool +glamor_font_init(ScreenPtr screen) +{ + if (glamor_font_generation != serverGeneration) { + glamor_font_private_index = AllocateFontPrivateIndex(); + if (glamor_font_private_index == -1) + return FALSE; + glamor_font_screen_count = 0; + glamor_font_generation = serverGeneration; + } + + if (screen->myNum >= glamor_font_screen_count) + glamor_font_screen_count = screen->myNum + 1; + + screen->RealizeFont = glamor_realize_font; + screen->UnrealizeFont = glamor_unrealize_font; + return TRUE; +} |