From 3dde787b2546958072e8a98350335b2bab6d1c17 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Wed, 6 May 2009 19:01:42 +0000
Subject: added r_mipmap variable to enable hardware generated mimaps

---
 src/render/render.cc   | 34 +++++++++++++++++++---------------
 src/render/render.h    | 13 +++++++++++--
 src/render/textures.cc |  6 +++---
 3 files changed, 33 insertions(+), 20 deletions(-)

(limited to 'src')

diff --git a/src/render/render.cc b/src/render/render.cc
index 9f364cb..60d64a7 100644
--- a/src/render/render.cc
+++ b/src/render/render.cc
@@ -35,6 +35,7 @@ core::Cvar *r_particles = 0;
 core::Cvar *r_radius = 0;
 core::Cvar *r_sky = 0;
 core::Cvar *r_wireframe = 0;
+core::Cvar *r_mipmap = 0;
 
 void func_list_textures(std::string const &args)
 {
@@ -62,21 +63,6 @@ void init(int width, int height)
 	// initialize render state
 	State::init(width, height);
 
-	if (!State::has_generate_mipmaps()) {
-		con_print << "  no hardware generated mipmap support" << std::endl;
-	}
-
-	Camera::init();
-
-	Textures::init();
-
-	Text::init();
-
-	Dust::init();
-
-	// read materials
-	model::Material::init();
-
 	// size of the vertex array in megabytes
 	r_arraysize = core::Cvar::get("r_arraysize", 64.0f , core::Cvar::Archive);
 	r_arraysize->set_info("[int] size of the vertex array in Mb");
@@ -114,6 +100,24 @@ void init(int width, int height)
 	Screenshot::screenshotquality = core::Cvar::get("screenshotquality", "85", core::Cvar::Archive);
 	Screenshot::screenshotquality->set_info("[int] screenshot jpg quality");
 
+	// hardware generate mipmaps
+	r_mipmap = core::Cvar::get("r_mipmap", "0", core::Cvar::Archive);
+	r_mipmap->set_info("[bool] use hardware generated mipmaps");
+	if (!State::has_generate_mipmaps()) {
+		con_print << "  no hardware generated mipmap support" << std::endl;
+	}
+
+	Camera::init();
+
+	Textures::init();
+
+	Text::init();
+
+	Dust::init();
+
+	// read materials
+	model::Material::init();
+
 	// engine functions
 	core::Func *func = core::Func::add("list_textures", func_list_textures);
 	func->set_info("list registered textures");
diff --git a/src/render/render.h b/src/render/render.h
index de881ff..a7b1950 100644
--- a/src/render/render.h
+++ b/src/render/render.h
@@ -36,14 +36,23 @@ namespace render {
 	/// resize viewport
 	void resize(int width, int height);
 
-	extern core::Cvar *r_arraysize;
+	/// size of the vertex array, in megabytes
+	extern core::Cvar *r_arraysize;	
+	/// render model bounding boxes
 	extern core::Cvar *r_bbox;
+	/// render the spacegrid
 	extern core::Cvar *r_grid;
+	/// render particle systems
 	extern core::Cvar *r_particles;
+	/// render entity radius
 	extern core::Cvar *r_radius;
+	/// render sky
 	extern core::Cvar *r_sky;
+	/// render wireframe models
 	extern core::Cvar *r_wireframe;
-
+	/// use hardware generated mipmaps (requires OpenGL 1.4, does not work on all cards)
+	extern core::Cvar *r_mipmap;
+	/// global vertex arrat
 	extern model::VertexArray *vertexarray;
 
 	inline RenderExt *ext_render(core::Entity *entity) { return static_cast<RenderExt *>(entity->extension((size_t)core::Extension::Render)); }
diff --git a/src/render/textures.cc b/src/render/textures.cc
index f5a5c62..5845bb6 100644
--- a/src/render/textures.cc
+++ b/src/render/textures.cc
@@ -6,6 +6,7 @@
 
 #include <string.h>
 
+#include "render/render.h"
 #include "render/gl.h"
 #include "render/image.h"
 #include "render/textures.h"
@@ -176,7 +177,7 @@ size_t Textures::load(const std::string &name, const bool filter)
 		// 4 levels of mipmaps
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 4);
 
-		if (State::has_generate_mipmaps()) {
+		if (r_mipmap->value()) {
 			// hardware generated mipmaps (requires OpenGL 1.4)
 			glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
 		}
@@ -197,12 +198,11 @@ size_t Textures::load(const std::string &name, const bool filter)
 		texture_internalformat = GL_RGB8;
 	}
 	
-	if (filter && !State::has_generate_mipmaps()) {
+	if (filter && (r_mipmap->value() <= 0)) {
 		gluBuild2DMipmaps(GL_TEXTURE_2D,
 			texture_internalformat, image->width(), image->height(),
 			texture_format, GL_UNSIGNED_BYTE, image->data());
 	} else {
-
 		glTexImage2D(GL_TEXTURE_2D, 0,
 			texture_internalformat, image->width(), image->height(), 0,
 			texture_format, GL_UNSIGNED_BYTE, image->data());
-- 
cgit v1.2.3