unsigned int iV_GetCountedTextWidth(const char *string, size_t string_length)
{
float boundingbox[8];
float pixel_width, point_width;
glcMeasureCountedString(GL_FALSE, string_length, string);
if (!glcGetStringMetric(GLC_BOUNDS, boundingbox))
{
debug(LOG_ERROR, "Couldn't retrieve a bounding box for the string \"%s\" of length %u", string, (unsigned int)string_length);
return 0;
}
point_width = getGLCPointWidth(boundingbox);
pixel_width = getGLCPointToPixel(point_width);
return (unsigned int)pixel_width;
}
unsigned int iV_GetTextHeight(const char *string)
{
float boundingbox[8];
float pixel_height, point_height;
glcMeasureString(GL_FALSE, string);
if (!glcGetStringMetric(GLC_BOUNDS, boundingbox))
{
debug(LOG_ERROR, "Couldn't retrieve a bounding box for the string \"%s\"", string);
return 0;
}
point_height = getGLCPointHeight(boundingbox);
pixel_height = getGLCPointToPixel(point_height);
return (unsigned int)pixel_height;
}
void display(void)
{
int i = 0;
GLfloat baseline[4] = {0.f, 0.f, 0.f, 0.f};
GLfloat bbox[8] = {0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f};
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(1.f, 0.f, 0.f);
glRasterPos2f(50.f, 50.f);
glcRenderString("Hello world!");
/* Render "H" and its bounding box */
glColor3f(0.f, 1.f, 1.f);
glTranslatef(50.f, 50.f, 0.f);
glcGetCharMetric('H', GLC_BOUNDS, bbox);
glBegin(GL_LINE_LOOP);
for (i = 0; i < 4; i++)
glVertex2fv(&bbox[2*i]);
glEnd();
/* Translate the model view matrix of the width of "H" */
glcGetCharMetric('H', GLC_BASELINE, baseline);
glTranslatef(baseline[2] - baseline[0], baseline[3] - baseline[1], 0.f);
/* Render the bouding box of "ello" */
glcMeasureString(GL_FALSE, "ello");
glcGetStringMetric(GLC_BOUNDS, bbox);
glBegin(GL_LINE_LOOP);
for (i = 0; i < 4; i++)
glVertex2fv(&bbox[2*i]);
glEnd();
glLoadIdentity();
glFlush();
}
void display(void)
{
int i = 0;
GLfloat bbox[8] = {0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f};
GLfloat bbox2[8] = {0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f, 0.f};
char string[20];
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* Render GLC_BITMAP without kerning */
glLoadIdentity();
glColor3f(1.f, 0.f, 0.f);
glRasterPos2f(50.f, 50.f);
glcDisable(GLC_KERNING_QSO);
glcRenderStyle(GLC_BITMAP);
glcLoadIdentity();
glcScale(100.f, 100.f);
glcRenderString("VAV");
glcMeasureString(GL_FALSE, "VAV");
glcGetStringMetric(GLC_BOUNDS, bbox);
glColor3f(0.f, 1.f, 1.f);
glTranslatef(50.f, 50.f, 0.f);
glBegin(GL_LINE_LOOP);
for (i = 0; i < 4; i++)
glVertex2fv(&bbox[2*i]);
glEnd();
/* Display the dimensions */
snprintf(string, 20, "%f", bbox[2] - bbox[0]);
glcEnable(GLC_HINTING_QSO);
glcScale(0.15f, 0.15f);
glcMeasureString(GL_FALSE, string);
glcGetStringMetric(GLC_BOUNDS, bbox2);
glColor3f(1.f, 1.f, 1.f);
glBegin(GL_LINE);
glVertex2fv(bbox);
glVertex2f(bbox[0], bbox[1] - 40.f);
glVertex2fv(&bbox[2]);
glVertex2f(bbox[2], bbox[3] - 40.f);
glVertex2f(bbox[0], bbox[1] - 30.f);
glVertex2f(bbox[2], bbox[3] - 30.f);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex2f(bbox[0] + 5.f, bbox[1] - 25.f);
glVertex2f(bbox[0], bbox[1] - 30.f);
glVertex2f(bbox[0] + 5.f, bbox[1] - 35.f);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex2f(bbox[2] - 5.f, bbox[1] - 25.f);
glVertex2f(bbox[2], bbox[1] - 30.f);
glVertex2f(bbox[2] - 5.f, bbox[1] - 35.f);
glEnd();
glLoadIdentity();
glRasterPos2f(floor((bbox[2] - bbox[0]
- (bbox2[2] - bbox2[0])) * 50.f) / 100.f + 50.f,
floorf((bbox[1] + 23.f) * 100.f) / 100.f);
glcRenderString(string);
glcDisable(GLC_HINTING_QSO);
/* Render GLC_TEXTURE without kerning */
glLoadIdentity();
glcRenderStyle(GLC_TEXTURE);
glColor3f(1.f, 0.f, 0.f);
glScalef(100.f, 100.f, 1.f);
glTranslatef(3.f, 0.5f, 0.f);
glPushMatrix();
/* In order to reproduce the conditions of bug #1987563, GLC_GL_OBJECTS must
* be disabled when rendering GLC_TEXTURE w/o kerning.
*/
glcRenderString("VAV");
glPopMatrix();
glcMeasureString(GL_TRUE, "VAV");
glcGetStringCharMetric(1, GLC_BOUNDS, bbox);
glColor3f(0.f, 1.f, 0.f);
glBegin(GL_LINE_LOOP);
for (i = 0; i < 4; i++)
glVertex2fv(&bbox[2*i]);
glEnd();
glcGetStringMetric(GLC_BOUNDS, bbox);
glColor3f(0.f, 1.f, 1.f);
glBegin(GL_LINE_LOOP);
for (i = 0; i < 4; i++)
glVertex2fv(&bbox[2*i]);
glEnd();
/* Display the dimensions */
snprintf(string, 20, "%f", (bbox[2] - bbox[0]) * 100.f);
glcEnable(GLC_HINTING_QSO);
glcMeasureString(GL_FALSE, string);
glcGetStringMetric(GLC_BOUNDS, bbox2);
glColor3f(1.f, 1.f, 1.f);
glBegin(GL_LINE);
glVertex2fv(bbox);
glVertex2f(bbox[0], bbox[1] - 0.4f);
glVertex2fv(&bbox[2]);
glVertex2f(bbox[2], bbox[3] - 0.4f);
glVertex2f(bbox[0], bbox[1] - 0.3f);
glVertex2f(bbox[2], bbox[3] - 0.3f);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex2f(bbox[0] + 0.05f, bbox[1] - 0.25f);
glVertex2f(bbox[0], bbox[1] - 0.3f);
glVertex2f(bbox[0] + 0.05f, bbox[1] - 0.35f);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex2f(bbox[2] - 0.05f, bbox[1] - 0.25f);
glVertex2f(bbox[2], bbox[1] - 0.3f);
glVertex2f(bbox[2] - 0.05f, bbox[1] - 0.35f);
glEnd();
/* When hinting is enabled, characters must be rendered at integer positions
* otherwise hinting is compromised and characters look fuzzy.
*/
glTranslatef(floorf((bbox[2] - bbox[0]
- (bbox2[2] - bbox2[0]) * 0.15f) * 50.f) / 100.f,
floorf((bbox[1] - 0.27f) * 100.f) / 100.f, 0.f);
glScalef(0.15f, 0.15f, 1.f);
glcRenderString(string);
glcDisable(GLC_HINTING_QSO);
/* Render GLC_BITMAP with kerning */
glColor3f(1.f, 0.f, 0.f);
glcEnable(GLC_KERNING_QSO);
glcRenderStyle(GLC_BITMAP);
glcLoadIdentity();
glcScale(100.f, 100.f);
glLoadIdentity();
glRasterPos2f(50.f, 150.f);
glcRenderString("VAV");
glcMeasureString(GL_FALSE, "VAV");
glcGetStringMetric(GLC_BOUNDS, bbox);
glColor3f(0.f, 1.f, 1.f);
glTranslatef(50.f, 150.f, 0.f);
glBegin(GL_LINE_LOOP);
for (i = 0; i < 4; i++)
glVertex2fv(&bbox[2*i]);
glEnd();
/* Display the dimensions */
snprintf(string, 20, "%f", bbox[4] - bbox[6]);
glcEnable(GLC_HINTING_QSO);
glcScale(0.15f, 0.15f);
glcMeasureString(GL_FALSE, string);
glcGetStringMetric(GLC_BOUNDS, bbox2);
glColor3f(1.f, 1.f, 1.f);
glBegin(GL_LINE);
glVertex2fv(&bbox[4]);
glVertex2f(bbox[4], bbox[5] + 40.f);
glVertex2fv(&bbox[6]);
glVertex2f(bbox[6], bbox[7] + 40.f);
glVertex2f(bbox[4], bbox[5] + 30.f);
glVertex2f(bbox[6], bbox[7] + 30.f);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex2f(bbox[4] - 5.f, bbox[5] + 25.f);
glVertex2f(bbox[4], bbox[5] + 30.f);
glVertex2f(bbox[4] - 5.f, bbox[5] + 35.f);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex2f(bbox[6] + 5.f, bbox[7] + 25.f);
glVertex2f(bbox[6], bbox[7] + 30.f);
glVertex2f(bbox[6] + 5.f, bbox[7] + 35.f);
glEnd();
glLoadIdentity();
glRasterPos2f(floorf((bbox[4] - bbox[6]
- (bbox2[4] - bbox2[6])) * 50.f) / 100.f + 50.f,
bbox[7] + 183.f);
glcRenderString(string);
glcScale(2.f, 2.f);
glcMeasureString(GL_FALSE, "GL_BITMAP");
glcGetStringMetric(GLC_BOUNDS, bbox2);
glRasterPos2f(floorf((bbox[2] - bbox[0]
- (bbox2[2] - bbox2[0])) * 50.f) / 100.f + 50.f,
300.f);
glcRenderString("GL_BITMAP");
glcDisable(GLC_HINTING_QSO);
/* Render GLC_TEXTURE with kerning */
glLoadIdentity();
glcRenderStyle(GLC_TEXTURE);
glColor3f(1.f, 0.f, 0.f);
glScalef(100.f, 100.f, 1.f);
glTranslatef(3.f, 1.5f, 0.f);
glPushMatrix();
glcRenderString("VAV");
glPopMatrix();
glcMeasureString(GL_TRUE, "VAV");
glcGetStringCharMetric(1, GLC_BOUNDS, bbox);
glColor3f(0.f, 1.f, 0.f);
glBegin(GL_LINE_LOOP);
for (i = 0; i < 4; i++)
glVertex2fv(&bbox[2*i]);
glEnd();
glcGetStringMetric(GLC_BOUNDS, bbox);
glColor3f(0.f, 1.f, 1.f);
glBegin(GL_LINE_LOOP);
for (i = 0; i < 4; i++)
glVertex2fv(&bbox[2*i]);
glEnd();
/* Display the dimensions */
snprintf(string, 20, "%f", (bbox[4] - bbox[6]) * 100.f);
glcEnable(GLC_HINTING_QSO);
glcMeasureString(GL_FALSE, string);
glcGetStringMetric(GLC_BOUNDS, bbox2);
glColor3f(1.f, 1.f, 1.f);
glBegin(GL_LINE);
glVertex2fv(&bbox[4]);
glVertex2f(bbox[4], bbox[5] + 0.4f);
glVertex2fv(&bbox[6]);
glVertex2f(bbox[6], bbox[7] + 0.4f);
glVertex2f(bbox[4], bbox[5] + 0.3f);
glVertex2f(bbox[6], bbox[7] + 0.3f);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex2f(bbox[6] + 0.05f, bbox[7] + 0.25f);
glVertex2f(bbox[6], bbox[7] + 0.3f);
glVertex2f(bbox[6] + 0.05f, bbox[7] + 0.35f);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex2f(bbox[4] - 0.05f, bbox[5] + 0.25f);
glVertex2f(bbox[4], bbox[5] + 0.3f);
glVertex2f(bbox[4] - 0.05f, bbox[5] + 0.35f);
glEnd();
glPushMatrix();
glTranslatef(floorf((bbox[4] - bbox[6]
- (bbox2[4] - bbox2[6]) * 0.15f) *50.f) / 100.f,
floorf((bbox[5] + 0.33f) * 100.f) / 100.f, 0.f);
glScalef(0.15f, 0.15f, 1.f);
glcRenderString(string);
glPopMatrix();
glcMeasureString(GL_FALSE, "GL_TEXTURE");
glcGetStringMetric(GLC_BOUNDS, bbox2);
glTranslatef(floorf((bbox[2] - bbox[0]
- (bbox2[2] - bbox2[0]) * 0.3f) * 50.f) / 100.f,
1.5f, 0.f);
glScalef(0.3f, 0.3f, 1.f);
glcRenderString("GL_TEXTURE");
glcDisable(GLC_HINTING_QSO);
glFlush();
}
