/* Copyright (C) 2001-2006, William Joseph. All Rights Reserved. This file is part of GtkRadiant. GtkRadiant is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. GtkRadiant is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GtkRadiant; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "glfont.h" #include "igl.h" // generic string printing with call lists class GLFontCallList: public GLFont { GLuint m_displayList; int m_pixelHeight; int m_pixelAscent; int m_pixelDescent; public: GLFontCallList(GLuint displayList, int asc, int desc, int pixelHeight) : m_displayList(displayList), m_pixelHeight(pixelHeight), m_pixelAscent(asc), m_pixelDescent(desc) { } virtual ~GLFontCallList() { glDeleteLists(m_displayList, 256); } void printString(const char *s) { GlobalOpenGL().m_glListBase(m_displayList); GlobalOpenGL().m_glCallLists(GLsizei(strlen(s)), GL_UNSIGNED_BYTE, reinterpret_cast(s)); } virtual int getPixelAscent() const { return m_pixelAscent; } virtual int getPixelDescent() const { return m_pixelDescent; } virtual int getPixelHeight() const { return m_pixelHeight; } }; #ifdef _WIN32 #include #endif #include "debugging/debugging.h" // LordHavoc: this is code for direct Xlib bitmap character fetching, as an // alternative to requiring gtkglarea, it was created due to a lack of this // package on SuSE 9.x but this package is now commonly shipping in Linux // distributions so this code may be unnecessary, feel free however to enable // it when building packages for distros that do not ship with that package, // or if you just prefer less dependencies... #if 0 #include #include #include GLFont *glfont_create(const char* font_string) { GLuint font_list_base; XFontStruct *fontInfo; Display *dpy = GDK_DISPLAY (); unsigned int i, first, last, firstrow, lastrow; int maxchars; int firstbitmap; fontInfo = XLoadQueryFont (dpy, "-*-fixed-*-*-*-*-8-*-*-*-*-*-*-*"); if (fontInfo == NULL) { // try to load other fonts fontInfo = XLoadQueryFont (dpy, "-*-fixed-*-*-*-*-*-*-*-*-*-*-*-*"); // any font will do ! if (fontInfo == NULL) fontInfo = XLoadQueryFont(dpy, "-*-*-*-*-*-*-*-*-*-*-*-*-*-*"); if (fontInfo == NULL) ERROR_MESSAGE("couldn't create font"); } first = (int)fontInfo->min_char_or_byte2; last = (int)fontInfo->max_char_or_byte2; firstrow = (int)fontInfo->min_byte1; lastrow = (int)fontInfo->max_byte1; /* * How many chars in the charset */ maxchars = 256 * lastrow + last; font_list_base = glGenLists(maxchars+1); if (font_list_base == 0) { ERROR_MESSAGE( "couldn't create font" ); } /* * Get offset to first char in the charset */ firstbitmap = 256 * firstrow + first; /* * for each row of chars, call glXUseXFont to build the bitmaps. */ for(i=firstrow; i<=lastrow; i++) { glXUseXFont(fontInfo->fid, firstbitmap, last-first+1, font_list_base+firstbitmap); firstbitmap += 256; } /* *height = fontInfo->ascent + fontInfo->descent; *width = fontInfo->max_bounds.width; */ return new GLFontCallList(font_list_base, fontInfo->ascent, fontInfo->descent, fontInfo->ascent + fontInfo->descent); } #else #include GLFont *glfont_create(const char* font_string) { GLuint font_list_base = glGenLists (256); gint font_height = 0, font_ascent = 0, font_descent = 0; PangoFontDescription* font_desc = pango_font_description_from_string (font_string); PangoFont* font = gdk_gl_font_use_pango_font (font_desc, 0, 256, font_list_base); if(font == 0) { pango_font_description_free (font_desc); font_desc = pango_font_description_from_string ("fixed 8"); font = gdk_gl_font_use_pango_font (font_desc, 0, 256, font_list_base); } if(font == 0) { pango_font_description_free (font_desc); font_desc = pango_font_description_from_string ("courier new 8"); font = gdk_gl_font_use_pango_font (font_desc, 0, 256, font_list_base); } if(font != 0) { PangoFontMetrics* font_metrics = pango_font_get_metrics (font, 0); font_ascent = pango_font_metrics_get_ascent (font_metrics); font_descent = pango_font_metrics_get_descent (font_metrics); font_height = font_ascent + font_descent; font_ascent = PANGO_PIXELS (font_ascent); font_descent = PANGO_PIXELS (font_descent); font_height = PANGO_PIXELS (font_height); pango_font_metrics_unref (font_metrics); } pango_font_description_free (font_desc); // fix for pango/gtkglext metrix bug if(font_height > 256) font_height = 16; return new GLFontCallList(font_list_base, font_ascent, font_descent, font_height); } #endif // new font code ripped from ZeroRadiant (not in use yet) #include #include class GLFontInternal: public GLFont { const char *font_string; int font_height; int font_ascent; int font_descent; int y_offset_bitmap_render_pango_units; PangoContext *ft2_context; PangoFontMap *fontmap; public: GLFontInternal(const char *_font_string): font_string(_font_string) { PangoFontDescription *font_desc; PangoLayout *layout; PangoRectangle log_rect; int font_ascent_pango_units; int font_descent_pango_units; #if !PANGO_VERSION_CHECK(1,22,0) ft2_context = pango_ft2_get_context(72, 72); #else fontmap = pango_ft2_font_map_new(); pango_ft2_font_map_set_resolution(PANGO_FT2_FONT_MAP(fontmap), 72, 72); ft2_context = pango_font_map_create_context(fontmap); #endif font_desc = pango_font_description_from_string(font_string); //pango_font_description_set_size(font_desc, 10 * PANGO_SCALE); pango_context_set_font_description(ft2_context, font_desc); pango_font_description_free(font_desc); // TODO fallback to fixed 8, courier new 8 layout = pango_layout_new(ft2_context); #if !PANGO_VERSION_CHECK(1,22,0) PangoLayoutIter *iter; iter = pango_layout_get_iter(layout); font_ascent_pango_units = pango_layout_iter_get_baseline(iter); pango_layout_iter_free(iter); #else font_ascent_pango_units = pango_layout_get_baseline(layout); #endif pango_layout_get_extents(layout, NULL, &log_rect); g_object_unref(G_OBJECT(layout)); font_descent_pango_units = log_rect.height - font_ascent_pango_units; font_ascent = PANGO_PIXELS_CEIL(font_ascent_pango_units); font_descent = PANGO_PIXELS_CEIL(font_descent_pango_units); font_height = font_ascent + font_descent; y_offset_bitmap_render_pango_units = (font_ascent * PANGO_SCALE) - font_ascent_pango_units; } virtual ~GLFontInternal() { g_object_unref(G_OBJECT(ft2_context)); g_object_unref(G_OBJECT(fontmap)); } // Renders the input text at the current location with the current color. // The X position of the current location is used to place the left edge of the text image, // where the text image bounds are defined as the logical extents of the line of text. // The Y position of the current location is used to place the bottom of the text image. // You should offset the Y position by the amount returned by gtk_glwidget_font_descent() // if you want to place the baseline of the text image at the current Y position. // Note: A problem with this function is that if the lower left corner of the text falls // just a hair outside of the viewport (meaning the current raster position is invalid), // then no text will be rendered. The solution to this is a very hacky one. You can search // Google for "glDrawPixels clipping". virtual void printString(const char *s) { // The idea for this code initially came from the font-pangoft2.c example that comes with GtkGLExt. PangoLayout *layout; PangoRectangle log_rect; FT_Bitmap bitmap; unsigned char *begin_bitmap_buffer; GLfloat color[4]; GLint previous_unpack_alignment; GLboolean previous_blend_enabled; GLint previous_blend_func_src; GLint previous_blend_func_dst; GLfloat previous_red_bias; GLfloat previous_green_bias; GLfloat previous_blue_bias; GLfloat previous_alpha_scale; layout = pango_layout_new(ft2_context); pango_layout_set_width(layout, -1); // -1 no wrapping. All text on one line. pango_layout_set_text(layout, s, -1); // -1 null-terminated string. pango_layout_get_extents(layout, NULL, &log_rect); if (log_rect.width > 0 && log_rect.height > 0) { bitmap.rows = font_ascent + font_descent; bitmap.width = PANGO_PIXELS_CEIL(log_rect.width); bitmap.pitch = -bitmap.width; // Rendering it "upside down" for OpenGL. begin_bitmap_buffer = (unsigned char *) g_malloc(bitmap.rows * bitmap.width); memset(begin_bitmap_buffer, 0, bitmap.rows * bitmap.width); bitmap.buffer = begin_bitmap_buffer + (bitmap.rows - 1) * bitmap.width; // See pitch above. bitmap.num_grays = 0xff; bitmap.pixel_mode = FT_PIXEL_MODE_GRAY; pango_ft2_render_layout_subpixel(&bitmap, layout, -log_rect.x, y_offset_bitmap_render_pango_units); GlobalOpenGL().m_glGetFloatv(GL_CURRENT_COLOR, color); // Save state. I didn't see any OpenGL push/pop operations for these. // Question: Is saving/restoring this state necessary? Being safe. GlobalOpenGL().m_glGetIntegerv(GL_UNPACK_ALIGNMENT, &previous_unpack_alignment); previous_blend_enabled = GlobalOpenGL().m_glIsEnabled(GL_BLEND); GlobalOpenGL().m_glGetIntegerv(GL_BLEND_SRC, &previous_blend_func_src); GlobalOpenGL().m_glGetIntegerv(GL_BLEND_DST, &previous_blend_func_dst); GlobalOpenGL().m_glGetFloatv(GL_RED_BIAS, &previous_red_bias); GlobalOpenGL().m_glGetFloatv(GL_GREEN_BIAS, &previous_green_bias); GlobalOpenGL().m_glGetFloatv(GL_BLUE_BIAS, &previous_blue_bias); GlobalOpenGL().m_glGetFloatv(GL_ALPHA_SCALE, &previous_alpha_scale); GlobalOpenGL().m_glPixelStorei(GL_UNPACK_ALIGNMENT, 1); GlobalOpenGL().m_glEnable(GL_BLEND); GlobalOpenGL().m_glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); GlobalOpenGL().m_glPixelTransferf(GL_RED_BIAS, color[0]); GlobalOpenGL().m_glPixelTransferf(GL_GREEN_BIAS, color[1]); GlobalOpenGL().m_glPixelTransferf(GL_BLUE_BIAS, color[2]); GlobalOpenGL().m_glPixelTransferf(GL_ALPHA_SCALE, color[3]); GlobalOpenGL().m_glDrawPixels(bitmap.width, bitmap.rows, GL_ALPHA, GL_UNSIGNED_BYTE, begin_bitmap_buffer); g_free(begin_bitmap_buffer); // Restore state in reverse order of how we set it. GlobalOpenGL().m_glPixelTransferf(GL_ALPHA_SCALE, previous_alpha_scale); GlobalOpenGL().m_glPixelTransferf(GL_BLUE_BIAS, previous_blue_bias); GlobalOpenGL().m_glPixelTransferf(GL_GREEN_BIAS, previous_green_bias); GlobalOpenGL().m_glPixelTransferf(GL_RED_BIAS, previous_red_bias); GlobalOpenGL().m_glBlendFunc(previous_blend_func_src, previous_blend_func_dst); if (!previous_blend_enabled) { GlobalOpenGL().m_glDisable(GL_BLEND); } GlobalOpenGL().m_glPixelStorei(GL_UNPACK_ALIGNMENT, previous_unpack_alignment); } g_object_unref(G_OBJECT(layout)); } virtual int getPixelAscent() const { return font_ascent; } virtual int getPixelDescent() const { return font_descent; } virtual int getPixelHeight() const { return font_height; } };