#include "stdafx.h"
#include <gtk/gtkgl.h>
+
+#ifndef _WIN32
#include <pango/pangoft2.h>
+#endif
+
#include "glwidget.h"
#include "qgl.h"
}
-// Think about rewriting this font stuff to use OpenGL display lists and bit maps.
+#ifdef _WIN32
+
+GLuint font_list_base;
+static gchar font_string[] = "courier 8";
+static gint font_height;
+static int font_created = 0;
+
+#else
+
+// 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 PangoContext *ft2_context = NULL;
static int _debug_font_created = 0;
+#endif
+
// Units are pixels. Returns a positive value [most likely].
int gtk_glwidget_font_ascent()
{
+#ifdef _WIN32
+
+ return 6; // Approximation.
+
+#else
+
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");
}
return font_ascent;
+
+#endif
}
// Units are pixels. Returns a positive value [most likely].
int gtk_glwidget_font_descent()
{
+#ifdef _WIN32
+
+ return 0; // Approximation.
+
+#else
+
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");
}
return font_descent;
+
+#endif
}
+#ifdef _WIN32
+
+void gtk_glwidget_create_font_win_internal()
+{
+ if (font_created) return;
+ font_created = 1;
+
+ PangoFontDescription *font_desc;
+ PangoFont *font;
+ PangoFontMetrics *font_metrics;
+
+ font_list_base = qglGenLists (256);
+
+ font_desc = pango_font_description_from_string (font_string);
+
+ font = gdk_gl_font_use_pango_font (font_desc, 0, 256, font_list_base);
+
+ if(font != NULL)
+ {
+ font_metrics = pango_font_get_metrics (font, NULL);
+
+ 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);
+ }
+
+ pango_font_description_free (font_desc);
+}
+
+#endif
+
void gtk_glwidget_create_font()
{
+#ifdef _WIN32
+
+ // Do nothing.
+
+#else
+
PangoFontDescription *font_desc;
PangoLayout *layout;
PangoRectangle log_rect;
pango_font_description_free(font_desc);
layout = pango_layout_new(ft2_context);
+
+#ifdef _WIN32
+
+ PangoLayoutIter *iter;
+ iter = pango_layout_get_iter(layout);
+ font_ascent_pango_units = pango_layout_iter_get_baseline(iter);
+ pango_layout_iter_free(iter);
+
+#else
+
+ // I don't believe that's standard preprocessor syntax?
#if !PANGO_VERSION_CHECK(1,22,0)
PangoLayoutIter *iter;
iter = pango_layout_get_iter(layout);
#else
font_ascent_pango_units = pango_layout_get_baseline(layout);
#endif
+
+#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;
+
+#endif
}
void gtk_glwidget_destroy_font()
{
+#ifdef _WIN32
+
+ // Do nothing.
+
+#else
+
if (!_debug_font_created) {
Error("Programming error: gtk_glwidget_destroy_font() called when font "
"does not exist");
y_offset_bitmap_render_pango_units = -1;
g_object_unref(G_OBJECT(ft2_context));
_debug_font_created = 0;
+
+#endif
}
// Google for "glDrawPixels clipping".
void gtk_glwidget_print_string(const char *s)
{
- // Much of this code is copied from the font-pangoft2.c example that comes with GtkGLExt.
+#ifdef _WIN32
+
+ gtk_glwidget_create_font_win_internal();
+ qglListBase(font_list_base);
+ qglCallLists(strlen(s), GL_UNSIGNED_BYTE, (unsigned char *)s);
+
+#else
+
+ // The idea for this code initially came from the font-pangoft2.c example that comes with GtkGLExt.
PangoLayout *layout;
- PangoRectangle ink_rect;
PangoRectangle log_rect;
FT_Bitmap bitmap;
- GLvoid *pixels;
- guint32 *p;
+ unsigned char *begin_bitmap_buffer;
GLfloat color[4];
- guint32 rgb;
- GLfloat alpha;
- guint8 *row, *row_end;
- int i;
GLint previous_unpack_alignment;
GLboolean previous_blend_enabled;
- GLint previous_blend_src;
- GLint previous_blend_dst;
-
+ 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; "
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, &ink_rect, &log_rect);
+ 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;
- bitmap.buffer = g_malloc(bitmap.rows * bitmap.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;
- memset(bitmap.buffer, 0, bitmap.rows * bitmap.width);
pango_ft2_render_layout_subpixel(&bitmap, layout, -log_rect.x,
y_offset_bitmap_render_pango_units);
-
- pixels = g_malloc(bitmap.rows * bitmap.width * 4);
- p = (guint32 *) pixels;
qglGetFloatv(GL_CURRENT_COLOR, color);
-#if !defined(GL_VERSION_1_2) && G_BYTE_ORDER == G_LITTLE_ENDIAN
- rgb =
- (((guint32) (color[0] * 255.0)) << 0) |
- (((guint32) (color[1] * 255.0)) << 8) |
- (((guint32) (color[2] * 255.0)) << 16);
-#else
- rgb =
- (((guint32) (color[0] * 255.0)) << 24) |
- (((guint32) (color[1] * 255.0)) << 16) |
- (((guint32) (color[2] * 255.0)) << 8);
-#endif
- alpha = color[3];
-
- row = bitmap.buffer + bitmap.rows * bitmap.width; // Past the end.
- row_end = bitmap.buffer; // Beginning.
-
- if (alpha == 1.0) {
- do {
- row -= bitmap.width;
- for (i = 0; i < bitmap.width; i++) {
-#if !defined(GL_VERSION_1_2) && G_BYTE_ORDER == G_LITTLE_ENDIAN
- *p++ = rgb | (((guint32) row[i]) << 24);
-#else
- *p++ = rgb | ((guint32) row[i]);
-#endif
- }
- } while (row != row_end);
- }
-
- else { // Translucent. Much less efficient, so try to avoid.
- do {
- row -= bitmap.width;
- for (i = 0; i < bitmap.width; i++) {
-#if !defined(GL_VERSION_1_2) && G_BYTE_ORDER == G_LITTLE_ENDIAN
- *p++ = rgb | (((guint32) (alpha * row[i])) << 24);
-#else
- *p++ = rgb | ((guint32) (alpha * row[i]));
-#endif
- }
- } while (row != row_end);
- }
// Save state. I didn't see any OpenGL push/pop operations for these.
- // Question: Is saving/restoring this state necessary?
+ // 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_src);
- qglGetIntegerv(GL_BLEND_DST, &previous_blend_dst);
-
- qglPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+ 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]);
-#if !defined(GL_VERSION_1_2)
- qglDrawPixels(bitmap.width, bitmap.rows,
- GL_RGBA, GL_UNSIGNED_BYTE, pixels);
-#else
qglDrawPixels(bitmap.width, bitmap.rows,
- GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, pixels);
-#endif
+ GL_ALPHA, GL_UNSIGNED_BYTE, begin_bitmap_buffer);
+ g_free(begin_bitmap_buffer);
// Restore state in reverse order of how we set it.
- qglBlendFunc(previous_blend_src, previous_blend_dst);
+ 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_free(bitmap.buffer);
- g_free(pixels);
}
g_object_unref(G_OBJECT(layout));
+
+#endif
}
void gtk_glwidget_print_char(char s)
{
+#ifdef _WIN32
+
+ gtk_glwidget_create_font_win_internal();
+ qglListBase(font_list_base);
+ qglCallLists(1, GL_UNSIGNED_BYTE, (unsigned char *) &s);
+
+#else
+
char str[2];
str[0] = s;
str[1] = '\0';
gtk_glwidget_print_string(str);
+
+#endif
}
projects / xonotic / netradiant.git / blobdiff