X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=blobdiff_plain;f=r_sky.c;h=7f941b478f56bbe75d6027f35d3251b3f0cd09df;hp=97b2dafe6fae404f48df7744575ee01106a6632e;hb=85a33377d64ae8438e6582a7b8472f5a4bd41942;hpb=cfee52a1ec9db338098789cae89ae5cf1f7a6fbf

diff --git a/r_sky.c b/r_sky.c
index 97b2dafe..7f941b47 100644
--- a/r_sky.c
+++ b/r_sky.c
@@ -6,8 +6,10 @@
 cvar_t r_sky = {CVAR_SAVE, "r_sky", "1", "enables sky rendering (black otherwise)"};
 cvar_t r_skyscroll1 = {CVAR_SAVE, "r_skyscroll1", "1", "speed at which upper clouds layer scrolls in quake sky"};
 cvar_t r_skyscroll2 = {CVAR_SAVE, "r_skyscroll2", "2", "speed at which lower clouds layer scrolls in quake sky"};
+cvar_t r_sky_scissor = {0, "r_sky_scissor", "1", "limit rendering of sky to approximately the area of the sky surfaces"};
 int skyrenderlater;
 int skyrendermasked;
+int skyscissor[4];
 
 static int skyrendersphere;
 static int skyrenderbox;
@@ -59,6 +61,8 @@ void R_SkyStartFrame(void)
 	skyrendermasked = false;
 	// for depth-masked sky, we need to know whether any sky was rendered
 	skyrenderlater = false;
+	// we can scissor the sky to just the relevant area
+	Vector4Clear(skyscissor);
 	if (r_sky.integer)
 	{
 		if (skyboxskinframe[0] || skyboxskinframe[1] || skyboxskinframe[2] || skyboxskinframe[3] || skyboxskinframe[4] || skyboxskinframe[5])
@@ -123,7 +127,7 @@ static int R_LoadSkyBox(void)
 			}
 			temp = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
 			Image_CopyMux (temp, image_buffer, image_width, image_height, suffix[j][i].flipx, suffix[j][i].flipy, suffix[j][i].flipdiagonal, 4, 4, indices);
-			skyboxskinframe[i] = R_SkinFrame_LoadInternalBGRA(va(vabuf, sizeof(vabuf), "skyboxside%d", i), TEXF_CLAMP | (gl_texturecompression_sky.integer ? TEXF_COMPRESS : 0), temp, image_width, image_height, vid.sRGB3D);
+			skyboxskinframe[i] = R_SkinFrame_LoadInternalBGRA(va(vabuf, sizeof(vabuf), "skyboxside%d", i), TEXF_CLAMP | (gl_texturecompression_sky.integer ? TEXF_COMPRESS : 0), temp, image_width, image_height, 0, 0, 0, vid.sRGB3D);
 			Mem_Free(image_buffer);
 			Mem_Free(temp);
 			success++;
@@ -401,6 +405,14 @@ void R_Sky(void)
 	Matrix4x4_CreateFromQuakeEntity(&skymatrix, r_refdef.view.origin[0], r_refdef.view.origin[1], r_refdef.view.origin[2], 0, 0, 0, r_refdef.farclip * (0.5f / 16.0f));
 	Matrix4x4_Invert_Simple(&skyinversematrix, &skymatrix);
 
+	if (r_sky_scissor.integer)
+	{
+		// if the scissor is empty just return
+		if (skyscissor[2] == 0 || skyscissor[3] == 0)
+			return;
+		GL_Scissor(skyscissor[0], skyscissor[1], skyscissor[2], skyscissor[3]);
+		GL_ScissorTest(true);
+	}
 	if (skyrendersphere)
 	{
 		// this does not modify depth buffer
@@ -420,6 +432,7 @@ void R_Sky(void)
 		//GL_Clear(GL_DEPTH_BUFFER_BIT);
 	}
 	*/
+	GL_Scissor(0, 0, vid.width, vid.height);
 }
 
 //===============================================================
@@ -454,6 +467,7 @@ void R_Sky_Init(void)
 	Cvar_RegisterVariable (&r_sky);
 	Cvar_RegisterVariable (&r_skyscroll1);
 	Cvar_RegisterVariable (&r_skyscroll2);
+	Cvar_RegisterVariable (&r_sky_scissor);
 	memset(&skyboxskinframe, 0, sizeof(skyboxskinframe));
 	skyname[0] = 0;
 	R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap, NULL, NULL);