-/*\r
-Copyright (c) 2001, Loki software, inc.\r
-All rights reserved.\r
-\r
-Redistribution and use in source and binary forms, with or without modification, \r
-are permitted provided that the following conditions are met:\r
-\r
-Redistributions of source code must retain the above copyright notice, this list \r
-of conditions and the following disclaimer.\r
-\r
-Redistributions in binary form must reproduce the above copyright notice, this\r
-list of conditions and the following disclaimer in the documentation and/or\r
-other materials provided with the distribution.\r
-\r
-Neither the name of Loki software nor the names of its contributors may be used \r
-to endorse or promote products derived from this software without specific prior \r
-written permission. \r
-\r
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' \r
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE \r
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE \r
-DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY \r
-DIRECT,INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES \r
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; \r
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON \r
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT \r
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS \r
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. \r
-*/\r
-\r
-// OpenGL widget based on GtkGLExt\r
-\r
-#include "stdafx.h"\r
-\r
-#include <gtk/gtkgl.h>\r
-#include "glwidget.h"\r
-#include "qgl.h"\r
-\r
-typedef int* attribs_t;\r
-typedef const attribs_t* configs_iterator;\r
-\r
-int config_rgba32[] = {\r
- GDK_GL_RGBA,\r
- GDK_GL_DOUBLEBUFFER,\r
- GDK_GL_RED_SIZE, 8,\r
- GDK_GL_BLUE_SIZE, 8,\r
- GDK_GL_GREEN_SIZE, 8,\r
- GDK_GL_ALPHA_SIZE, 8,\r
- GDK_GL_ATTRIB_LIST_NONE,\r
-};\r
-\r
-int config_rgba[] = {\r
- GDK_GL_RGBA,\r
- GDK_GL_DOUBLEBUFFER,\r
- GDK_GL_RED_SIZE, 1,\r
- GDK_GL_BLUE_SIZE, 1,\r
- GDK_GL_GREEN_SIZE, 1,\r
- GDK_GL_ALPHA_SIZE, 1,\r
- GDK_GL_ATTRIB_LIST_NONE,\r
-};\r
-\r
-const attribs_t configs[] = {\r
- config_rgba32,\r
- config_rgba,\r
-};\r
-\r
-GdkGLConfig* glconfig_new()\r
-{\r
- GdkGLConfig* glconfig = NULL;\r
-\r
- for(configs_iterator i = configs, end = configs + 2; i != end && glconfig == NULL; ++i)\r
- {\r
- glconfig = gdk_gl_config_new(*i);\r
- }\r
-\r
- if(glconfig == NULL)\r
- {\r
- return gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE));\r
- }\r
-\r
- return glconfig;\r
-}\r
-\r
-int config_rgba32_depth32[] = {\r
- GDK_GL_RGBA,\r
- GDK_GL_DOUBLEBUFFER,\r
- GDK_GL_RED_SIZE, 8,\r
- GDK_GL_BLUE_SIZE, 8,\r
- GDK_GL_GREEN_SIZE, 8,\r
- GDK_GL_ALPHA_SIZE, 8,\r
- GDK_GL_DEPTH_SIZE, 32,\r
- GDK_GL_ATTRIB_LIST_NONE,\r
-};\r
-\r
-int config_rgba32_depth24[] = {\r
- GDK_GL_RGBA,\r
- GDK_GL_DOUBLEBUFFER,\r
- GDK_GL_RED_SIZE, 8,\r
- GDK_GL_BLUE_SIZE, 8,\r
- GDK_GL_GREEN_SIZE, 8,\r
- GDK_GL_ALPHA_SIZE, 8,\r
- GDK_GL_DEPTH_SIZE, 24,\r
- GDK_GL_ATTRIB_LIST_NONE,\r
-};\r
-\r
-int config_rgba32_depth16[] = {\r
- GDK_GL_RGBA,\r
- GDK_GL_DOUBLEBUFFER,\r
- GDK_GL_RED_SIZE, 8,\r
- GDK_GL_BLUE_SIZE, 8,\r
- GDK_GL_GREEN_SIZE, 8,\r
- GDK_GL_ALPHA_SIZE, 8,\r
- GDK_GL_DEPTH_SIZE, 16,\r
- GDK_GL_ATTRIB_LIST_NONE,\r
-};\r
-\r
-int config_rgba32_depth[] = {\r
- GDK_GL_RGBA,\r
- GDK_GL_DOUBLEBUFFER,\r
- GDK_GL_RED_SIZE, 8,\r
- GDK_GL_BLUE_SIZE, 8,\r
- GDK_GL_GREEN_SIZE, 8,\r
- GDK_GL_ALPHA_SIZE, 8,\r
- GDK_GL_DEPTH_SIZE, 1,\r
- GDK_GL_ATTRIB_LIST_NONE,\r
-};\r
-\r
-int config_rgba_depth16[] = {\r
- GDK_GL_RGBA,\r
- GDK_GL_DOUBLEBUFFER,\r
- GDK_GL_RED_SIZE, 1,\r
- GDK_GL_BLUE_SIZE, 1,\r
- GDK_GL_GREEN_SIZE, 1,\r
- GDK_GL_ALPHA_SIZE, 1,\r
- GDK_GL_DEPTH_SIZE, 16,\r
- GDK_GL_ATTRIB_LIST_NONE,\r
-};\r
-\r
-int config_rgba_depth[] = {\r
- GDK_GL_RGBA,\r
- GDK_GL_DOUBLEBUFFER,\r
- GDK_GL_RED_SIZE, 1,\r
- GDK_GL_BLUE_SIZE, 1,\r
- GDK_GL_GREEN_SIZE, 1,\r
- GDK_GL_ALPHA_SIZE, 1,\r
- GDK_GL_DEPTH_SIZE, 1,\r
- GDK_GL_ATTRIB_LIST_NONE,\r
-};\r
-\r
-const attribs_t configs_with_depth[] = \r
-{\r
- config_rgba32_depth32,\r
- config_rgba32_depth24,\r
- config_rgba32_depth16,\r
- config_rgba32_depth,\r
- config_rgba_depth16,\r
- config_rgba_depth,\r
-};\r
-\r
-GdkGLConfig* glconfig_new_with_depth()\r
-{\r
- GdkGLConfig* glconfig = NULL;\r
-\r
- for(configs_iterator i = configs_with_depth, end = configs_with_depth + 6; i != end && glconfig == NULL; ++i)\r
- {\r
- glconfig = gdk_gl_config_new(*i);\r
- }\r
-\r
- if(glconfig == NULL)\r
- {\r
- return gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE | GDK_GL_MODE_DEPTH));\r
- }\r
-\r
- return glconfig;\r
-}\r
-\r
-GtkWidget* WINAPI gtk_glwidget_new (gboolean zbuffer, GtkWidget* share)\r
-{\r
- GtkWidget* drawing_area = gtk_drawing_area_new();\r
- GdkGLConfig* glconfig = (zbuffer) ? glconfig_new_with_depth() : glconfig_new();\r
- GdkGLContext* shared_context = (share) ? gtk_widget_get_gl_context(share) : NULL;\r
-\r
- gtk_widget_set_gl_capability (drawing_area, glconfig, shared_context, TRUE, GDK_GL_RGBA_TYPE);\r
-\r
- return drawing_area;\r
-}\r
-\r
-void WINAPI gtk_glwidget_destroy_context (GtkWidget *widget)\r
-{\r
-}\r
-\r
-void WINAPI gtk_glwidget_create_context (GtkWidget *widget)\r
-{\r
-}\r
-\r
-void WINAPI gtk_glwidget_swap_buffers (GtkWidget *widget)\r
-{\r
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);\r
- gdk_gl_drawable_swap_buffers (gldrawable);\r
-}\r
-\r
-gboolean WINAPI gtk_glwidget_make_current (GtkWidget *widget)\r
-{\r
- GdkGLContext *glcontext = gtk_widget_get_gl_context (widget);\r
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);\r
- return gdk_gl_drawable_gl_begin (gldrawable, glcontext);\r
-}\r
-\r
-GLuint font_list_base;\r
-static gchar font_string[] = "courier 8";\r
-static gint font_height;\r
-\r
-void gtk_glwidget_create_font (GtkWidget *widget)\r
-{\r
- GdkGLContext *glcontext = gtk_widget_get_gl_context (widget);\r
- GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);\r
-\r
- PangoFontDescription *font_desc;\r
- PangoFont *font;\r
- PangoFontMetrics *font_metrics;\r
-\r
- font_list_base = qglGenLists (256);\r
-\r
- font_desc = pango_font_description_from_string (font_string);\r
-\r
- font = gdk_gl_font_use_pango_font (font_desc, 0, 256, font_list_base);\r
-\r
- if(font != NULL)\r
- {\r
- font_metrics = pango_font_get_metrics (font, NULL);\r
-\r
- font_height = pango_font_metrics_get_ascent (font_metrics) +\r
- pango_font_metrics_get_descent (font_metrics);\r
- font_height = PANGO_PIXELS (font_height);\r
-\r
- pango_font_metrics_unref (font_metrics);\r
- }\r
-\r
- pango_font_description_free (font_desc);\r
-}\r
-\r
-\r
-void gtk_glwidget_print_string(const char *s)\r
-{\r
- qglListBase(font_list_base);\r
- qglCallLists(strlen(s), GL_UNSIGNED_BYTE, (unsigned char *)s);\r
-}\r
-\r
-void gtk_glwidget_print_char(char s)\r
-{\r
- qglListBase(font_list_base);\r
- qglCallLists(1, GL_UNSIGNED_BYTE, (unsigned char *) &s);\r
-}\r
-\r
+/*
+Copyright (c) 2001, Loki software, inc.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+Redistributions of source code must retain the above copyright notice, this list
+of conditions and the following disclaimer.
+
+Redistributions in binary form must reproduce the above copyright notice, this
+list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+Neither the name of Loki software nor the names of its contributors may be used
+to endorse or promote products derived from this software without specific prior
+written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+DIRECT,INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+// OpenGL widget based on GtkGLExt
+
+#include "stdafx.h"
+
+#include <gtk/gtkgl.h>
+#include <pango/pangoft2.h>
+#include "glwidget.h"
+#include "qgl.h"
+
+typedef int* attribs_t;
+typedef const attribs_t* configs_iterator;
+
+int config_rgba32[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 1,
+ GDK_GL_BLUE_SIZE, 1,
+ GDK_GL_GREEN_SIZE, 1,
+ GDK_GL_ALPHA_SIZE, 1,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+const attribs_t configs[] = {
+ config_rgba32,
+ config_rgba,
+};
+
+GdkGLConfig* glconfig_new()
+{
+ GdkGLConfig* glconfig = NULL;
+
+ for(configs_iterator i = configs, end = configs + 2; i != end && glconfig == NULL; ++i)
+ {
+ glconfig = gdk_gl_config_new(*i);
+ }
+
+ if(glconfig == NULL)
+ {
+ return gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE));
+ }
+
+ return glconfig;
+}
+
+int config_rgba32_depth32[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_DEPTH_SIZE, 32,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba32_depth24[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_DEPTH_SIZE, 24,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba32_depth16[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_DEPTH_SIZE, 16,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba32_depth[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 8,
+ GDK_GL_BLUE_SIZE, 8,
+ GDK_GL_GREEN_SIZE, 8,
+ GDK_GL_ALPHA_SIZE, 8,
+ GDK_GL_DEPTH_SIZE, 1,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba_depth16[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 1,
+ GDK_GL_BLUE_SIZE, 1,
+ GDK_GL_GREEN_SIZE, 1,
+ GDK_GL_ALPHA_SIZE, 1,
+ GDK_GL_DEPTH_SIZE, 16,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+int config_rgba_depth[] = {
+ GDK_GL_RGBA,
+ GDK_GL_DOUBLEBUFFER,
+ GDK_GL_RED_SIZE, 1,
+ GDK_GL_BLUE_SIZE, 1,
+ GDK_GL_GREEN_SIZE, 1,
+ GDK_GL_ALPHA_SIZE, 1,
+ GDK_GL_DEPTH_SIZE, 1,
+ GDK_GL_ATTRIB_LIST_NONE,
+};
+
+const attribs_t configs_with_depth[] =
+{
+ config_rgba32_depth32,
+ config_rgba32_depth24,
+ config_rgba32_depth16,
+ config_rgba32_depth,
+ config_rgba_depth16,
+ config_rgba_depth,
+};
+
+GdkGLConfig* glconfig_new_with_depth()
+{
+ GdkGLConfig* glconfig = NULL;
+
+ for(configs_iterator i = configs_with_depth, end = configs_with_depth + 6; i != end && glconfig == NULL; ++i)
+ {
+ glconfig = gdk_gl_config_new(*i);
+ }
+
+ if(glconfig == NULL)
+ {
+ return gdk_gl_config_new_by_mode((GdkGLConfigMode)(GDK_GL_MODE_RGBA | GDK_GL_MODE_DOUBLE | GDK_GL_MODE_DEPTH));
+ }
+
+ return glconfig;
+}
+
+GtkWidget* WINAPI gtk_glwidget_new (gboolean zbuffer, GtkWidget* share)
+{
+ GtkWidget* drawing_area = gtk_drawing_area_new();
+ GdkGLConfig* glconfig = (zbuffer) ? glconfig_new_with_depth() : glconfig_new();
+ GdkGLContext* shared_context = (share) ? gtk_widget_get_gl_context(share) : NULL;
+
+ gtk_widget_set_gl_capability (drawing_area, glconfig, shared_context, TRUE, GDK_GL_RGBA_TYPE);
+
+ return drawing_area;
+}
+
+void WINAPI gtk_glwidget_destroy_context (GtkWidget *widget)
+{
+}
+
+void WINAPI gtk_glwidget_create_context (GtkWidget *widget)
+{
+}
+
+void WINAPI gtk_glwidget_swap_buffers (GtkWidget *widget)
+{
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);
+ gdk_gl_drawable_swap_buffers (gldrawable);
+}
+
+gboolean WINAPI gtk_glwidget_make_current (GtkWidget *widget)
+{
+ GdkGLContext *glcontext = gtk_widget_get_gl_context (widget);
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);
+ return gdk_gl_drawable_gl_begin (gldrawable, glcontext);
+}
+
+
+// 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()
+{
+ 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;
+}
+
+// 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");
+ }
+
+ return font_descent;
+}
+
+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);
+
+#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);
+ 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
+
+#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;
+}
+
+void gtk_glwidget_destroy_font()
+{
+ if (!_debug_font_created) {
+ Error("Programming error: gtk_glwidget_destroy_font() called when font "
+ "does not exist");
+ }
+
+ font_ascent = -1;
+ font_descent = -1;
+ y_offset_bitmap_render_pango_units = -1;
+ g_object_unref(G_OBJECT(ft2_context));
+ _debug_font_created = 0;
+}
+
+
+// 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));
+}
+
+void gtk_glwidget_print_char(char s)
+{
+ char str[2];
+ str[0] = s;
+ str[1] = '\0';
+ gtk_glwidget_print_string(str);
+}
projects / xonotic / netradiant.git / blobdiff