/*
-Copyright (c) 2001, Loki software, inc.
-All rights reserved.
+ Copyright (C) 2001-2006, William Joseph.
+ All Rights Reserved.
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
+ This file is part of GtkRadiant.
-Redistributions of source code must retain the above copyright notice, this list
-of conditions and the following disclaimer.
+ GtkRadiant is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-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.
+ GtkRadiant is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-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.
+ You should have received a copy of the GNU General Public License
+ along with GtkRadiant; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
-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);
-}
+#include "igtkgl.h"
+#include "modulesystem.h"
+#include "gtkutil/glwidget.h"
-// 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()
+class GtkGLAPI
{
- 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");
- }
+_QERGtkGLTable m_gtkgl;
+public:
+typedef _QERGtkGLTable Type;
+STRING_CONSTANT( Name, "*" );
- return font_ascent;
+GtkGLAPI(){
+ m_gtkgl.glwidget_new = &glwidget_new;
+ m_gtkgl.glwidget_swap_buffers = &glwidget_swap_buffers;
+ m_gtkgl.glwidget_make_current = &glwidget_make_current;
+ m_gtkgl.glwidget_destroy_context = &glwidget_destroy_context;
+ m_gtkgl.glwidget_create_context = &glwidget_create_context;
}
-
-// 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;
+_QERGtkGLTable* getTable(){
+ return &m_gtkgl;
}
+};
-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;
-}
-
-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));
-}
+#include "modulesystem/singletonmodule.h"
+#include "modulesystem/moduleregistry.h"
-void gtk_glwidget_print_char(char s)
-{
- char str[2];
- str[0] = s;
- str[1] = '\0';
- gtk_glwidget_print_string(str);
-}
+typedef SingletonModule<GtkGLAPI> GtkGLModule;
+typedef Static<GtkGLModule> StaticGtkGLModule;
+StaticRegisterModule staticRegisterGtkGL( StaticGtkGLModule::instance() );
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