#include "stdafx.h"
#include <gtk/gtkgl.h>
-#include <pango/pangoft2.h>
#include "glwidget.h"
#include "qgl.h"
return gdk_gl_drawable_gl_begin (gldrawable, glcontext);
}
+GLuint font_list_base;
+static gchar font_string[] = "courier 8";
+static gint font_height;
-// Think about rewriting this font stuff to use OpenGL display lists and glBitmap().
-// Bit maps together with display lists may offer a performance increase, but
-// they would not allow antialiased fonts.
-static const char font_string[] = "Monospace";
-static const int font_height = 10;
-static int font_ascent = -1;
-static int font_descent = -1;
-static int y_offset_bitmap_render_pango_units = -1;
-static PangoContext *ft2_context = NULL;
-static int _debug_font_created = 0;
-
-
-// Units are pixels. Returns a positive value [most likely].
-int gtk_glwidget_font_ascent()
+void gtk_glwidget_create_font (GtkWidget *widget)
{
- if (!_debug_font_created) {
- Error("Programming error: gtk_glwidget_font_ascent() called but font does not exist; "
- "you should have called gtk_glwidget_create_font() first");
- }
+ PangoFontDescription *font_desc;
+ PangoFont *font;
+ PangoFontMetrics *font_metrics;
- return font_ascent;
-}
+ font_list_base = qglGenLists (256);
-// Units are pixels. Returns a positive value [most likely].
-int gtk_glwidget_font_descent()
-{
- if (!_debug_font_created) {
- Error("Programming error: gtk_glwidget_font_descent() called but font does not exist; "
- "you should have called gtk_glwidget_create_font() first");
- }
+ font_desc = pango_font_description_from_string (font_string);
- return font_descent;
-}
+ font = gdk_gl_font_use_pango_font (font_desc, 0, 256, font_list_base);
-void gtk_glwidget_create_font()
-{
- PangoFontDescription *font_desc;
- PangoLayout *layout;
- PangoRectangle log_rect;
- int font_ascent_pango_units;
- int font_descent_pango_units;
-
- if (_debug_font_created) {
- Error("Programming error: gtk_glwidget_create_font() was already called; "
- "you must call gtk_glwidget_destroy_font() before creating font again");
- }
- _debug_font_created = 1;
-
- // This call is deprecated so we'll have to fix it sometime.
- ft2_context = pango_ft2_get_context(72, 72);
-
- font_desc = pango_font_description_from_string(font_string);
- pango_font_description_set_size(font_desc, font_height * PANGO_SCALE);
- pango_context_set_font_description(ft2_context, font_desc);
- pango_font_description_free(font_desc);
-
- 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);
- y_offset_bitmap_render_pango_units = (font_ascent * PANGO_SCALE) - font_ascent_pango_units;
-}
+ if(font != NULL)
+ {
+ font_metrics = pango_font_get_metrics (font, NULL);
-void gtk_glwidget_destroy_font()
-{
- if (!_debug_font_created) {
- Error("Programming error: gtk_glwidget_destroy_font() called when font "
- "does not exist");
+ font_height = pango_font_metrics_get_ascent (font_metrics) +
+ pango_font_metrics_get_descent (font_metrics);
+ font_height = PANGO_PIXELS (font_height);
+
+ pango_font_metrics_unref (font_metrics);
}
- font_ascent = -1;
- font_descent = -1;
- y_offset_bitmap_render_pango_units = -1;
- g_object_unref(G_OBJECT(ft2_context));
- _debug_font_created = 0;
+ pango_font_description_free (font_desc);
}
-// 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".
void gtk_glwidget_print_string(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;
-
- if (!_debug_font_created) {
- Error("Programming error: gtk_glwidget_print_string() called but font does not exist; "
- "you should have called gtk_glwidget_create_font() first");
- }
-
- 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);
- qglGetFloatv(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.
- qglGetIntegerv(GL_UNPACK_ALIGNMENT, &previous_unpack_alignment);
- previous_blend_enabled = qglIsEnabled(GL_BLEND);
- qglGetIntegerv(GL_BLEND_SRC, &previous_blend_func_src);
- qglGetIntegerv(GL_BLEND_DST, &previous_blend_func_dst);
- qglGetFloatv(GL_RED_BIAS, &previous_red_bias);
- qglGetFloatv(GL_GREEN_BIAS, &previous_green_bias);
- qglGetFloatv(GL_BLUE_BIAS, &previous_blue_bias);
- qglGetFloatv(GL_ALPHA_SCALE, &previous_alpha_scale);
-
- qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- qglEnable(GL_BLEND);
- qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- qglPixelTransferf(GL_RED_BIAS, color[0]);
- qglPixelTransferf(GL_GREEN_BIAS, color[1]);
- qglPixelTransferf(GL_BLUE_BIAS, color[2]);
- qglPixelTransferf(GL_ALPHA_SCALE, color[3]);
-
- qglDrawPixels(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.
- qglPixelTransferf(GL_ALPHA_SCALE, previous_alpha_scale);
- qglPixelTransferf(GL_BLUE_BIAS, previous_blue_bias);
- qglPixelTransferf(GL_GREEN_BIAS, previous_green_bias);
- qglPixelTransferf(GL_RED_BIAS, previous_red_bias);
- qglBlendFunc(previous_blend_func_src, previous_blend_func_dst);
- if (!previous_blend_enabled) { qglDisable(GL_BLEND); }
- qglPixelStorei(GL_UNPACK_ALIGNMENT, previous_unpack_alignment);
- }
-
- g_object_unref(G_OBJECT(layout));
+ qglListBase(font_list_base);
+ qglCallLists(strlen(s), GL_UNSIGNED_BYTE, (unsigned char *)s);
}
void gtk_glwidget_print_char(char s)
{
- char str[2];
- str[0] = s;
- str[1] = '\0';
- gtk_glwidget_print_string(str);
+ qglListBase(font_list_base);
+ qglCallLists(1, GL_UNSIGNED_BYTE, (unsigned char *) &s);
}
+
while ((step * m_fScale) < 4.0f) // make sure major grid spacing is at least 4 pixels on the screen
step *= 8;
//Sys_Printf("step after: %i\n", step);
- while ((stepx * m_fScale) < 40.0f) // text step x must be at least 40 pixels
+ while ((stepx * m_fScale) < 32.0f) // text step x must be at least 32
stepx *= 2;
- while ((stepy * m_fScale) < 40.0f) // text step y must be at least 40 pixels
+ while ((stepy * m_fScale) < 32.0f) // text step y must be at least 32
stepy *= 2;
qglDisable(GL_TEXTURE_2D);
if ( g_qeglobals.d_savedinfo.show_coordinates)
{
qglColor3fv(g_qeglobals.d_savedinfo.colors[COLOR_GRIDTEXT]);
-
- // Pixels between top of label for vertical grid line and top of grid view window.
- // Note: There is currently a bug where the top few pixels of the grid view are hidden
- // under the border. So you should add about 5 to the desired value here. However,
- // the font ascent reaches higher than all digits, so you can subtract a few from the final
- // number.
- const int pixelsTopCushion = 4;
-
- // Pixels between left of label and
- // - left of grid view window (for horizontal grid line label) or
- // - drawn vertical grid line (for vertical grid line label).
- const int pixelsLeftCushion = 2; // IMPORTANT! Must be at least 1 otherwise labels might not be drawn
- // because the origin of the text might be off screen due to rounding.
-
- // Pixels between baseline of horizontal grid line label and drawn horizontal grid line.
- const int pixelsButtomCushion = 2;
-
- float yPosLabelsTop = m_vOrigin[nDim2] + h - (gtk_glwidget_font_ascent() + pixelsTopCushion) / m_fScale;
- float xPosLabelsLeft = m_vOrigin[nDim1] - w + pixelsLeftCushion / m_fScale;
- float leftCushion = pixelsLeftCushion / m_fScale;
- float bottomOffset = (pixelsButtomCushion - gtk_glwidget_font_descent()) / m_fScale;
-
- // This renders the numbers along varying X on top of the grid view (labels vertical grid lines).
- for (x = xb - ((int) xb) % stepx; x <= xe; x += stepx) {
- qglRasterPos2f(x + leftCushion, yPosLabelsTop);
- sprintf(text, "%i", (int) x);
- gtk_glwidget_print_string(text);
- }
-
- // This renders the numbers along varying Y on the left of the grid view (labels horizontal grid lines).
- for (y = yb - ((int) yb) % stepy; y <= ye; y += stepy) {
- qglRasterPos2f(xPosLabelsLeft, y + bottomOffset);
- sprintf(text, "%i", (int) y);
- gtk_glwidget_print_string(text);
- }
+ float offx = m_vOrigin[nDim2] + h - 6 / m_fScale, offy = m_vOrigin[nDim1] - w + 1 / m_fScale;
+ for (x=xb-((int)xb)%stepx; x<=xe ; x+=stepx)
+ {
+ qglRasterPos2f (x, offx);
+ sprintf (text, "%i",(int)x);
+ gtk_glwidget_print_string(text);
+ }
+ for (y=yb-((int)yb)%stepy; y<=ye ; y+=stepy)
+ {
+ qglRasterPos2f (offy, y);
+ sprintf (text, "%i",(int)y);
+ gtk_glwidget_print_string(text);
+ }
if (Active())
qglColor3fv(g_qeglobals.d_savedinfo.colors[COLOR_VIEWNAME]);