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handle "font for OpenGL rendering was not created" case better: don't crash, don't render bs, assert

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This commit is contained in:
Garux 2019-04-07 17:49:23 +03:00
parent bfc66aa6af
commit 11724e3d58
1 changed files with 16 additions and 7 deletions
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19
libs/gtkutil/glfont.cpp
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@ -90,7 +90,7 @@ void gray_to_texture( const int x_max, const int y_max, const unsigned char *in,
// generic string printing with call lists
class GLFontCallList : public GLFont
class GLFontCallList final : public GLFont
{
GLuint m_displayList;
int m_pixelHeight;
@ -102,9 +102,11 @@ public:
GLFontCallList( GLuint displayList, int asc, int desc, int pixelHeight, PangoFontMap *fontmap, PangoContext *ft2_context ) :
m_displayList( displayList ), m_pixelHeight( pixelHeight ), m_pixelAscent( asc ), m_pixelDescent( desc ), m_fontmap( fontmap ), m_ft2_context( ft2_context ){
}
virtual ~GLFontCallList(){
~GLFontCallList(){
glDeleteLists( m_displayList, 256 );
if( m_ft2_context )
g_object_unref( G_OBJECT( m_ft2_context ) );
if( m_fontmap )
g_object_unref( G_OBJECT( m_fontmap ) );
}
void printString( const char *s ){
@ -113,6 +115,10 @@ void printString( const char *s ){
}
void renderString( const char *s, const GLuint& tex, const unsigned int colour[3], int& wid, int& hei ){
if( !m_ft2_context || m_pixelHeight == 0 ){
wid = hei = 0;
return;
}
PangoLayout *layout;
PangoRectangle log_rect;
@ -362,13 +368,13 @@ void renderString( const char *s, const GLuint& tex, const unsigned int colour[3
}
g_object_unref( G_OBJECT( layout ) );
}
virtual int getPixelAscent() const {
int getPixelAscent() const {
return m_pixelAscent;
}
virtual int getPixelDescent() const {
int getPixelDescent() const {
return m_pixelDescent;
}
virtual int getPixelHeight() const {
int getPixelHeight() const {
return m_pixelHeight;
}
};
@ -741,6 +747,9 @@ GLFont *glfont_create( const char* font_string ){
font_descent = PANGO_PIXELS_CEIL( font_descent_pango_units );
font_height = font_ascent + font_descent;
}
ASSERT_MESSAGE( font != 0, "font for OpenGL rendering was not created" );
return new GLFontCallList( font_list_base, font_ascent, font_descent, font_height, fontmap, ft2_context );
}