Exemplo n.º 1
0
static void split_width(int x, int n, int *splitx, int *nx)
{
	int a, newnx, waste;

	/* if already power of two just use it */
	if(is_pow2(x)) {
		splitx[0]= x;
		(*nx)++;
		return;
	}

	if(n == 1) {
		/* last part, we have to go larger */
		splitx[0]= larger_pow2(x);
		(*nx)++;
	}
	else {
		/* two or more parts to go, use smaller part */
		splitx[0]= smaller_pow2(x);
		newnx= ++(*nx);
		split_width(x-splitx[0], n-1, splitx+1, &newnx);

		for(waste=0, a=0; a<n; a++)
			waste += splitx[a];

		/* if we waste more space or use the same amount,
		 * revert deeper splits and just use larger */
		if(waste >= larger_pow2(x)) {
			splitx[0]= larger_pow2(x);
			memset(splitx+1, 0, sizeof(int)*(n-1));
		}
		else
			*nx= newnx;
	}
}
Exemplo n.º 2
0
static void checker_board_color_fill(unsigned char *rect, float *rect_float, int width, int height)
{
	int hue_step, y, x;
	float hue, val, sat, r, g, b;

	sat= 1.0;

	hue_step= larger_pow2(width / 8);
	if(hue_step < 8) hue_step= 8;

	for(y= 0; y < height; y++)
	{

		val= 0.1 + (y * (0.4 / height)); /* use a number lower then 1.0 else its too bright */
		for(x= 0; x < width; x++)
		{
			hue= (float)((double)(x/hue_step) * 1.0 / width * hue_step);
			hsv_to_rgb(hue, sat, val, &r, &g, &b);

			if (rect) {
				rect[0]= (char)(r * 255.0f);
				rect[1]= (char)(g * 255.0f);
				rect[2]= (char)(b * 255.0f);
				rect[3]= 255;
				
				rect += 4;
			}

			if (rect_float) {
				rect_float[0]= r;
				rect_float[1]= g;
				rect_float[2]= b;
				rect_float[3]= 1.0f;
				
				rect_float += 4;
			}
		}
	}
}
Exemplo n.º 3
0
void draw_volume(ARegion *ar, GPUTexture *tex, float *min, float *max, int res[3], float dx, GPUTexture *tex_shadow)
{
	RegionView3D *rv3d= ar->regiondata;

	float viewnormal[3];
	int i, j, n, good_index;
	float d /*, d0 */ /* UNUSED */, dd, ds;
	float *points = NULL;
	int numpoints = 0;
	float cor[3] = {1.,1.,1.};
	int gl_depth = 0, gl_blend = 0;

	/* draw slices of smoke is adapted from c++ code authored by: Johannes Schmid and Ingemar Rask, 2006, [email protected] */
	float cv[][3] = {
		{1.0f, 1.0f, 1.0f}, {-1.0f, 1.0f, 1.0f}, {-1.0f, -1.0f, 1.0f}, {1.0f, -1.0f, 1.0f},
		{1.0f, 1.0f, -1.0f}, {-1.0f, 1.0f, -1.0f}, {-1.0f, -1.0f, -1.0f}, {1.0f, -1.0f, -1.0f}
	};

	// edges have the form edges[n][0][xyz] + t*edges[n][1][xyz]
	float edges[12][2][3] = {
		{{1.0f, 1.0f, -1.0f}, {0.0f, 0.0f, 2.0f}},
		{{-1.0f, 1.0f, -1.0f}, {0.0f, 0.0f, 2.0f}},
		{{-1.0f, -1.0f, -1.0f}, {0.0f, 0.0f, 2.0f}},
		{{1.0f, -1.0f, -1.0f}, {0.0f, 0.0f, 2.0f}},

		{{1.0f, -1.0f, 1.0f}, {0.0f, 2.0f, 0.0f}},
		{{-1.0f, -1.0f, 1.0f}, {0.0f, 2.0f, 0.0f}},
		{{-1.0f, -1.0f, -1.0f}, {0.0f, 2.0f, 0.0f}},
		{{1.0f, -1.0f, -1.0f}, {0.0f, 2.0f, 0.0f}},

		{{-1.0f, 1.0f, 1.0f}, {2.0f, 0.0f, 0.0f}},
		{{-1.0f, -1.0f, 1.0f}, {2.0f, 0.0f, 0.0f}},
		{{-1.0f, -1.0f, -1.0f}, {2.0f, 0.0f, 0.0f}},
		{{-1.0f, 1.0f, -1.0f}, {2.0f, 0.0f, 0.0f}}
	};

	/* Fragment program to calculate the view3d of smoke */
	/* using 2 textures, density and shadow */
	const char *text = "!!ARBfp1.0\n"
					"PARAM dx = program.local[0];\n"
					"PARAM darkness = program.local[1];\n"
					"PARAM f = {1.442695041, 1.442695041, 1.442695041, 0.01};\n"
					"TEMP temp, shadow, value;\n"
					"TEX temp, fragment.texcoord[0], texture[0], 3D;\n"
					"TEX shadow, fragment.texcoord[0], texture[1], 3D;\n"
					"MUL value, temp, darkness;\n"
					"MUL value, value, dx;\n"
					"MUL value, value, f;\n"
					"EX2 temp, -value.r;\n"
					"SUB temp.a, 1.0, temp.r;\n"
					"MUL temp.r, temp.r, shadow.r;\n"
					"MUL temp.g, temp.g, shadow.r;\n"
					"MUL temp.b, temp.b, shadow.r;\n"
					"MOV result.color, temp;\n"
					"END\n";
	GLuint prog;

	
	float size[3];

	if(!tex) {
		printf("Could not allocate 3D texture for 3D View smoke drawing.\n");
		return;
	}

	tstart();

	sub_v3_v3v3(size, max, min);

	// maxx, maxy, maxz
	cv[0][0] = max[0];
	cv[0][1] = max[1];
	cv[0][2] = max[2];
	// minx, maxy, maxz
	cv[1][0] = min[0];
	cv[1][1] = max[1];
	cv[1][2] = max[2];
	// minx, miny, maxz
	cv[2][0] = min[0];
	cv[2][1] = min[1];
	cv[2][2] = max[2];
	// maxx, miny, maxz
	cv[3][0] = max[0];
	cv[3][1] = min[1];
	cv[3][2] = max[2];

	// maxx, maxy, minz
	cv[4][0] = max[0];
	cv[4][1] = max[1];
	cv[4][2] = min[2];
	// minx, maxy, minz
	cv[5][0] = min[0];
	cv[5][1] = max[1];
	cv[5][2] = min[2];
	// minx, miny, minz
	cv[6][0] = min[0];
	cv[6][1] = min[1];
	cv[6][2] = min[2];
	// maxx, miny, minz
	cv[7][0] = max[0];
	cv[7][1] = min[1];
	cv[7][2] = min[2];

	copy_v3_v3(edges[0][0], cv[4]); // maxx, maxy, minz
	copy_v3_v3(edges[1][0], cv[5]); // minx, maxy, minz
	copy_v3_v3(edges[2][0], cv[6]); // minx, miny, minz
	copy_v3_v3(edges[3][0], cv[7]); // maxx, miny, minz

	copy_v3_v3(edges[4][0], cv[3]); // maxx, miny, maxz
	copy_v3_v3(edges[5][0], cv[2]); // minx, miny, maxz
	copy_v3_v3(edges[6][0], cv[6]); // minx, miny, minz
	copy_v3_v3(edges[7][0], cv[7]); // maxx, miny, minz

	copy_v3_v3(edges[8][0], cv[1]); // minx, maxy, maxz
	copy_v3_v3(edges[9][0], cv[2]); // minx, miny, maxz
	copy_v3_v3(edges[10][0], cv[6]); // minx, miny, minz
	copy_v3_v3(edges[11][0], cv[5]); // minx, maxy, minz

	// printf("size x: %f, y: %f, z: %f\n", size[0], size[1], size[2]);
	// printf("min[2]: %f, max[2]: %f\n", min[2], max[2]);

	edges[0][1][2] = size[2];
	edges[1][1][2] = size[2];
	edges[2][1][2] = size[2];
	edges[3][1][2] = size[2];

	edges[4][1][1] = size[1];
	edges[5][1][1] = size[1];
	edges[6][1][1] = size[1];
	edges[7][1][1] = size[1];

	edges[8][1][0] = size[0];
	edges[9][1][0] = size[0];
	edges[10][1][0] = size[0];
	edges[11][1][0] = size[0];

	glGetBooleanv(GL_BLEND, (GLboolean *)&gl_blend);
	glGetBooleanv(GL_DEPTH_TEST, (GLboolean *)&gl_depth);

	glLoadMatrixf(rv3d->viewmat);
	// glMultMatrixf(ob->obmat);	

	glDepthMask(GL_FALSE);
	glDisable(GL_DEPTH_TEST);
	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

	/*
	printf("Viewinv:\n");
	printf("%f, %f, %f\n", rv3d->viewinv[0][0], rv3d->viewinv[0][1], rv3d->viewinv[0][2]);
	printf("%f, %f, %f\n", rv3d->viewinv[1][0], rv3d->viewinv[1][1], rv3d->viewinv[1][2]);
	printf("%f, %f, %f\n", rv3d->viewinv[2][0], rv3d->viewinv[2][1], rv3d->viewinv[2][2]);
	*/

	// get view vector
	copy_v3_v3(viewnormal, rv3d->viewinv[2]);
	normalize_v3(viewnormal);

	// find cube vertex that is closest to the viewer
	for (i=0; i<8; i++) {
		float x,y,z;

		x = cv[i][0] - viewnormal[0];
		y = cv[i][1] - viewnormal[1];
		z = cv[i][2] - viewnormal[2];

		if ((x>=min[0])&&(x<=max[0])
			&&(y>=min[1])&&(y<=max[1])
			&&(z>=min[2])&&(z<=max[2])) {
			break;
		}
	}

	if(i >= 8) {
		/* fallback, avoid using buffer over-run */
		i= 0;
	}

	// printf("i: %d\n", i);
	// printf("point %f, %f, %f\n", cv[i][0], cv[i][1], cv[i][2]);

	if (GL_TRUE == glewIsSupported("GL_ARB_fragment_program"))
	{
		glEnable(GL_FRAGMENT_PROGRAM_ARB);
		glGenProgramsARB(1, &prog);

		glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, prog);
		glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, (GLsizei)strlen(text), text);

		// cell spacing
		glProgramLocalParameter4fARB (GL_FRAGMENT_PROGRAM_ARB, 0, dx, dx, dx, 1.0);
		// custom parameter for smoke style (higher = thicker)
		glProgramLocalParameter4fARB (GL_FRAGMENT_PROGRAM_ARB, 1, 7.0, 7.0, 7.0, 1.0);
	}
	else
		printf("Your gfx card does not support 3D View smoke drawing.\n");

	GPU_texture_bind(tex, 0);
	if(tex_shadow)
		GPU_texture_bind(tex_shadow, 1);
	else
		printf("No volume shadow\n");

	if (!GPU_non_power_of_two_support()) {
		cor[0] = (float)res[0]/(float)larger_pow2(res[0]);
		cor[1] = (float)res[1]/(float)larger_pow2(res[1]);
		cor[2] = (float)res[2]/(float)larger_pow2(res[2]);
	}

	// our slices are defined by the plane equation a*x + b*y +c*z + d = 0
	// (a,b,c), the plane normal, are given by viewdir
	// d is the parameter along the view direction. the first d is given by
	// inserting previously found vertex into the plane equation

	/* d0 = (viewnormal[0]*cv[i][0] + viewnormal[1]*cv[i][1] + viewnormal[2]*cv[i][2]); */ /* UNUSED */
	ds = (ABS(viewnormal[0])*size[0] + ABS(viewnormal[1])*size[1] + ABS(viewnormal[2])*size[2]);
	dd = 0.05; // ds/512.0f;
	n = 0;
	good_index = i;

	// printf("d0: %f, dd: %f, ds: %f\n\n", d0, dd, ds);

	points = MEM_callocN(sizeof(float)*12*3, "smoke_points_preview");

	while(1) {
		float p0[3];
		float tmp_point[3], tmp_point2[3];

		if(dd*(float)n > ds)
			break;

		copy_v3_v3(tmp_point, viewnormal);
		mul_v3_fl(tmp_point, -dd*((ds/dd)-(float)n));
		add_v3_v3v3(tmp_point2, cv[good_index], tmp_point);
		d = dot_v3v3(tmp_point2, viewnormal);

		// printf("my d: %f\n", d);

		// intersect_edges returns the intersection points of all cube edges with
		// the given plane that lie within the cube
		numpoints = intersect_edges(points, viewnormal[0], viewnormal[1], viewnormal[2], -d, edges);

		// printf("points: %d\n", numpoints);

		if (numpoints > 2) {
			copy_v3_v3(p0, points);

			// sort points to get a convex polygon
			for(i = 1; i < numpoints - 1; i++)
			{
				for(j = i + 1; j < numpoints; j++)
				{
					if(!convex(p0, viewnormal, &points[j * 3], &points[i * 3]))
					{
						float tmp2[3];
						copy_v3_v3(tmp2, &points[j * 3]);
						copy_v3_v3(&points[j * 3], &points[i * 3]);
						copy_v3_v3(&points[i * 3], tmp2);
					}
				}
			}

			// printf("numpoints: %d\n", numpoints);
			glBegin(GL_POLYGON);
			glColor3f(1.0, 1.0, 1.0);
			for (i = 0; i < numpoints; i++) {
				glTexCoord3d((points[i * 3 + 0] - min[0] )*cor[0]/size[0], (points[i * 3 + 1] - min[1])*cor[1]/size[1], (points[i * 3 + 2] - min[2])*cor[2]/size[2]);
				glVertex3f(points[i * 3 + 0], points[i * 3 + 1], points[i * 3 + 2]);
			}
			glEnd();
		}
		n++;
	}

	tend();
	// printf ( "Draw Time: %f\n",( float ) tval() );

	if(tex_shadow)
		GPU_texture_unbind(tex_shadow);
	GPU_texture_unbind(tex);

	if(GLEW_ARB_fragment_program)
	{
		glDisable(GL_FRAGMENT_PROGRAM_ARB);
		glDeleteProgramsARB(1, &prog);
	}


	MEM_freeN(points);

	if(!gl_blend)
		glDisable(GL_BLEND);
	if(gl_depth)
	{
		glEnable(GL_DEPTH_TEST);
		glDepthMask(GL_TRUE);	
	}
}
Exemplo n.º 4
0
GPUTexture *GPU_texture_create_3D(int w, int h, int depth, float *fpixels)
{
	GPUTexture *tex;
	GLenum type, format, internalformat;
	void *pixels = NULL;
	float vfBorderColor[4] = {0.0f, 0.0f, 0.0f, 0.0f};

	if(!GLEW_VERSION_1_2)
		return NULL;

	tex = MEM_callocN(sizeof(GPUTexture), "GPUTexture");
	tex->w = w;
	tex->h = h;
	tex->depth = depth;
	tex->number = -1;
	tex->refcount = 1;
	tex->target = GL_TEXTURE_3D;

	glGenTextures(1, &tex->bindcode);

	if (!tex->bindcode) {
		fprintf(stderr, "GPUTexture: texture create failed: %d\n",
			(int)glGetError());
		GPU_texture_free(tex);
		return NULL;
	}

	if (!GPU_non_power_of_two_support()) {
		tex->w = larger_pow2(tex->w);
		tex->h = larger_pow2(tex->h);
		tex->depth = larger_pow2(tex->depth);
	}

	tex->number = 0;
	glBindTexture(tex->target, tex->bindcode);

	GPU_print_error("3D glBindTexture");

	type = GL_FLOAT; // GL_UNSIGNED_BYTE
	format = GL_RED;
	internalformat = GL_INTENSITY;

	//if (fpixels)
	//	pixels = GPU_texture_convert_pixels(w*h*depth, fpixels);

	glTexImage3D(tex->target, 0, internalformat, tex->w, tex->h, tex->depth, 0, format, type, NULL);

	GPU_print_error("3D glTexImage3D");

	if (fpixels) {
		if(!GPU_non_power_of_two_support() && (w != tex->w || h != tex->h || depth != tex->depth)) {
			/* clear first to avoid unitialized pixels */
			float *zero= MEM_callocN(sizeof(float)*tex->w*tex->h*tex->depth, "zero");
			glTexSubImage3D(tex->target, 0, 0, 0, 0, tex->w, tex->h, tex->depth, format, type, zero);
			MEM_freeN(zero);
		}

		glTexSubImage3D(tex->target, 0, 0, 0, 0, w, h, depth, format, type, fpixels);
		GPU_print_error("3D glTexSubImage3D");
	}


	glTexParameterfv(GL_TEXTURE_3D, GL_TEXTURE_BORDER_COLOR, vfBorderColor);
	GPU_print_error("3D GL_TEXTURE_BORDER_COLOR");
	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	GPU_print_error("3D GL_LINEAR");
	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
	GPU_print_error("3D GL_CLAMP_TO_BORDER");

	if (pixels)
		MEM_freeN(pixels);

	if (tex)
		GPU_texture_unbind(tex);

	return tex;
}
Exemplo n.º 5
0
static GPUTexture *GPU_texture_create_nD(int w, int h, int n, float *fpixels, int depth, char err_out[256])
{
	GPUTexture *tex;
	GLenum type, format, internalformat;
	void *pixels = NULL;

	if(depth && !GLEW_ARB_depth_texture)
		return NULL;

	tex = MEM_callocN(sizeof(GPUTexture), "GPUTexture");
	tex->w = w;
	tex->h = h;
	tex->number = -1;
	tex->refcount = 1;
	tex->target = (n == 1)? GL_TEXTURE_1D: GL_TEXTURE_2D;
	tex->depth = depth;

	glGenTextures(1, &tex->bindcode);

	if (!tex->bindcode) {
		if(err_out) {
			BLI_snprintf(err_out, 256, "GPUTexture: texture create failed: %d",
				(int)glGetError());
		}
		else {
			fprintf(stderr, "GPUTexture: texture create failed: %d\n",
				(int)glGetError());
		}
		GPU_texture_free(tex);
		return NULL;
	}

	if (!GPU_non_power_of_two_support()) {
		tex->w = larger_pow2(tex->w);
		tex->h = larger_pow2(tex->h);
	}

	tex->number = 0;
	glBindTexture(tex->target, tex->bindcode);

	if(depth) {
		type = GL_UNSIGNED_BYTE;
		format = GL_DEPTH_COMPONENT;
		internalformat = GL_DEPTH_COMPONENT;
	}
	else {
		type = GL_UNSIGNED_BYTE;
		format = GL_RGBA;
		internalformat = GL_RGBA8;

		if (fpixels)
			pixels = GPU_texture_convert_pixels(w*h, fpixels);
	}

	if (tex->target == GL_TEXTURE_1D) {
		glTexImage1D(tex->target, 0, internalformat, tex->w, 0, format, type, NULL);

		if (fpixels) {
			glTexSubImage1D(tex->target, 0, 0, w, format, type,
				pixels? pixels: fpixels);

			if (tex->w > w)
				GPU_glTexSubImageEmpty(tex->target, format, w, 0,
					tex->w-w, 1);
		}
	}
	else {
		glTexImage2D(tex->target, 0, internalformat, tex->w, tex->h, 0,
			format, type, NULL);

		if (fpixels) {
			glTexSubImage2D(tex->target, 0, 0, 0, w, h,
				format, type, pixels? pixels: fpixels);

			if (tex->w > w)
				GPU_glTexSubImageEmpty(tex->target, format, w, 0, tex->w-w, tex->h);
			if (tex->h > h)
				GPU_glTexSubImageEmpty(tex->target, format, 0, h, w, tex->h-h);
		}
	}

	if (pixels)
		MEM_freeN(pixels);

	if(depth) {
		glTexParameteri(tex->target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
		glTexParameteri(tex->target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
		glTexParameteri(tex->target, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE);
		glTexParameteri(tex->target, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);
		glTexParameteri(tex->target, GL_DEPTH_TEXTURE_MODE_ARB, GL_INTENSITY);  
	}
	else {
		glTexParameteri(tex->target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
		glTexParameteri(tex->target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	}

	if (tex->target != GL_TEXTURE_1D) {
		/* CLAMP_TO_BORDER is an OpenGL 1.3 core feature */
		GLenum wrapmode = (depth)? GL_CLAMP_TO_EDGE: GL_CLAMP_TO_BORDER;
		glTexParameteri(tex->target, GL_TEXTURE_WRAP_S, wrapmode);
		glTexParameteri(tex->target, GL_TEXTURE_WRAP_T, wrapmode);

#if 0
		float borderColor[] = { 1.0f, 1.0f, 1.0f, 1.0f };
		glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor); 
#endif
	}
	else
		glTexParameteri(tex->target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

	return tex;
}
Exemplo n.º 6
0
void Blur_init(){
	blur=Blur_basic;
	sw=larger_pow2(screen->w);
	sh=larger_pow2(screen->h);
	
	GLint mx;
	glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mx);
	
	consoleLog("Blur_init: required texture size is %dx%d\n", sw, sh);
	
	if(sw>mx || sh>mx){
		consoleLog("Blur_init: too big texture, disabling blur\n");
		blur=Blur_none;
		return;
	}
	
	consoleLog("Blur_init: allocating screen buffer\n");
	
	glGenTextures(1, &tex_screen);
	glBindTexture(GL_TEXTURE_2D, tex_screen);
#if GL_EXT_framebuffer_object
	if(use_hdr){
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, 
					 sw,sh, 0,
					 GL_RGB, GL_HALF_FLOAT_ARB, NULL);
	}else{
#endif
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 
					 sw,sh, 0,
					 GL_RGB, GL_UNSIGNED_BYTE, NULL);
#if GL_EXT_framebuffer_object
	}
#endif
	glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
	glClearColor(0.f, 0.f, 0.0f, 1.f);
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
	glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_FALSE);
	glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, screen->w, screen->h);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
	clearTexture(sw, sh);
	
#if GL_ARB_shader_objects
#if GL_ARB_depth_texture
	
	if(cap_glsl){
		
		consoleLog("Blur_init: allocating depth buffer\n");
		
		glGenTextures(1, &tex_depth);
		glBindTexture(GL_TEXTURE_2D, tex_depth);
		int comp;
		GLint i;
		glGetIntegerv(GL_DEPTH_BITS, &i);
		switch(i){
			case 16:
				comp=GL_DEPTH_COMPONENT16_ARB;
				break;
			case 24:
				comp=GL_DEPTH_COMPONENT24_ARB;
				break;
			case 32:
				comp=GL_DEPTH_COMPONENT32_ARB;
				break;
			default:
				comp=GL_DEPTH_COMPONENT;
				break;
		}
		comp=GL_DEPTH_COMPONENT;
		if(use_hdr)
			comp=GL_DEPTH_COMPONENT24_ARB;
		
		glTexImage2D(GL_TEXTURE_2D, 0, comp, 
					 sw,sh, 0,
					 GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
		
	}
#endif
#endif
	
#if GL_ARB_shader_objects
	
	if(cap_glsl){
	
		prg_blurSimple=create_program("res/shaders/blur1.vs", "res/shaders/blur1.fs");
		if(prg_blurSimple)
			consoleLog("Blur_init: compiled program \"blur1\"\n");
		else
			consoleLog("Blur_init: couldn't compile program \"blur1\"\n");
	
#if GL_ARB_depth_texture
		prg_blurDepth=create_program("res/shaders/blur2.vs", "res/shaders/blur2.fs");
		if(prg_blurDepth)
			consoleLog("Blur_init: compiled program \"blur2\"\n");
		else
			consoleLog("Blur_init: couldn't compile program \"blur2\"\n");
	
#endif
		
	}else{
		
#endif
	
		consoleLog("Blur_init: no programs to compile\n");
		
#if GL_ARB_shader_objects

	}
		
#endif
	
#if GL_ARB_shader_objects
	if(cap_glsl){
		blur=Blur_glsl_simple;
#if GL_ARB_depth_texture
		blur=Blur_glsl_depth;
#endif
	}
#endif

}