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refactoring font code to hopefully be closer to be able to exchange the font system by something not call list based

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This commit is contained in:
Rudolf Polzer 2010-11-18 16:52:51 +01:00
parent c4d9df0a2c
commit 3ce82871e3
4 changed files with 79 additions and 62 deletions
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6
include/igl.h
View File

@ -1976,6 +1976,7 @@ typedef unsigned int GLhandleARB;
#endif
#include "gtkutil/glfont.h"
/// \brief A module which wraps a runtime-binding of the standard OpenGL functions.
/// Provides convenience functions for querying availabiliy of extensions, rendering text and error-checking.
@ -1997,7 +1998,7 @@ struct OpenGLBinding
/// \brief Asserts that there no OpenGL errors have occurred since the last call to glGetError.
void (*assertNoErrors)(const char *file, int line);
GLuint m_font;
GLFont *m_font; // MUST be set!
int m_fontHeight;
int m_fontAscent;
int m_fontDescent;
@ -2005,8 +2006,7 @@ struct OpenGLBinding
/// \brief Renders \p string at the current raster-position of the current context.
void drawString(const char* string) const
{
m_glListBase(m_font);
m_glCallLists(GLsizei(strlen(string)), GL_UNSIGNED_BYTE, reinterpret_cast<const GLubyte*>(string));
m_font->printString(string);
}
/// \brief Renders \p character at the current raster-position of the current context.

84
libs/gtkutil/glfont.cpp
View File

@ -20,10 +20,45 @@ 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<const GLubyte*>(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 <windows.h>
#endif
#include <GL/gl.h>
#include "debugging/debugging.h"
// LordHavoc: this is code for direct Xlib bitmap character fetching, as an
@ -38,7 +73,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#include <gdk/gdkx.h>
#include <GL/glx.h>
GLFont glfont_create(const char* font_string)
GLFont *glfont_create(const char* font_string)
{
GLuint font_list_base;
XFontStruct *fontInfo;
@ -91,20 +126,14 @@ GLFont glfont_create(const char* font_string)
/* *height = fontInfo->ascent + fontInfo->descent;
*width = fontInfo->max_bounds.width; */
return GLFont(font_list_base, fontInfo->ascent + fontInfo->descent);
}
void glfont_release(GLFont& font)
{
glDeleteLists(font.getDisplayList(), 256);
font = GLFont(0, 0);
return new GLFontCallList(font_list_base, fontInfo->ascent, fontInfo->descent, fontInfo->ascent + fontInfo->descent);
}
#else
#include <gtk/gtkglwidget.h>
GLFont glfont_create(const char* font_string)
GLFont *glfont_create(const char* font_string)
{
GLuint font_list_base = glGenLists (256);
gint font_height = 0, font_ascent = 0, font_descent = 0;
@ -148,25 +177,16 @@ GLFont glfont_create(const char* font_string)
if(font_height > 256)
font_height = 16;
return GLFont(font_list_base, font_ascent, font_descent, font_height);
}
void glfont_release(GLFont& font)
{
glDeleteLists(font.getDisplayList(), 256);
font = GLFont(0, 0, 0, 0);
return new GLFontCallList(font_list_base, font_ascent, font_descent, font_height);
}
#endif
// new font code ripped from ZeroRadiant (not in use yet)
#include <pango/pangoft2.h>
#include <pango/pango-utils.h>
#include "igl.h"
class GLFontInternal
class GLFontInternal: public GLFont
{
const char *font_string;
int font_height;
@ -185,10 +205,13 @@ class GLFontInternal
int font_ascent_pango_units;
int font_descent_pango_units;
//ft2_context = pango_ft2_get_context(72, 72);
#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);
@ -215,7 +238,7 @@ class GLFontInternal
y_offset_bitmap_render_pango_units = (font_ascent * PANGO_SCALE) - font_ascent_pango_units;
}
~GLFontInternal()
virtual ~GLFontInternal()
{
g_object_unref(G_OBJECT(ft2_context));
g_object_unref(G_OBJECT(fontmap));
@ -231,7 +254,7 @@ class GLFontInternal
// 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".
void printString(const char *s)
virtual void printString(const char *s)
{
// The idea for this code initially came from the font-pangoft2.c example that comes with GtkGLExt.
@ -302,4 +325,17 @@ class GLFontInternal
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;
}
};

32
libs/gtkutil/glfont.h
View File

@ -26,33 +26,17 @@ typedef unsigned int GLuint;
class GLFont
{
GLuint m_displayList;
int m_pixelHeight;
int m_pixelAscent;
int m_pixelDescent;
public:
GLFont(GLuint displayList, int asc, int desc, int pixelHeight) : m_displayList(displayList), m_pixelHeight(pixelHeight), m_pixelAscent(asc), m_pixelDescent(desc)
public:
virtual int getPixelHeight() const = 0;
virtual int getPixelAscent() const = 0;
virtual int getPixelDescent() const = 0;
virtual void printString(const char *s) = 0;
virtual ~GLFont()
{
}
GLuint getDisplayList() const
{
return m_displayList;
}
int getPixelHeight() const
{
return m_pixelHeight;
}
int getPixelAscent() const
{
return m_pixelAscent;
}
int getPixelDescent() const
{
return m_pixelDescent;
}
};
GLFont glfont_create(const char* font_string);
void glfont_release(GLFont& font);
GLFont *glfont_create(const char* font_string);
// release with delete
#endif

15
radiant/mainframe.cpp
View File

@ -3316,13 +3316,10 @@ void GridStatus_onTextureLockEnabledChanged()
}
}
namespace
{
GLFont g_font(0, 0, 0, 0);
}
void GlobalGL_sharedContextCreated()
{
GLFont *g_font = NULL;
// report OpenGL information
globalOutputStream() << "GL_VENDOR: " << reinterpret_cast<const char*>(glGetString (GL_VENDOR)) << "\n";
globalOutputStream() << "GL_RENDERER: " << reinterpret_cast<const char*>(glGetString (GL_RENDERER)) << "\n";
@ -3347,10 +3344,10 @@ void GlobalGL_sharedContextCreated()
g_font = glfont_create(fontname);
#endif
GlobalOpenGL().m_font = g_font.getDisplayList();
GlobalOpenGL().m_fontHeight = g_font.getPixelHeight();
GlobalOpenGL().m_fontAscent = g_font.getPixelAscent();
GlobalOpenGL().m_fontDescent = g_font.getPixelDescent();
GlobalOpenGL().m_font = g_font;
GlobalOpenGL().m_fontHeight = g_font->getPixelHeight();
GlobalOpenGL().m_fontAscent = g_font->getPixelAscent();
GlobalOpenGL().m_fontDescent = g_font->getPixelDescent();
}
void GlobalGL_sharedContextDestroyed()