improved r_shadows 2 shadowmapping setup code a bit, especially the

[xonotic/darkplaces.git] / r_shadow.c

diff --git a/r_shadow.c b/r_shadow.c
index b4b04085543c20ae3b615b9929f168194ff1b768..4392b2ed94df92d384d1d51fc2e90a7908dc15cc 100644 (file)
--- a/r_shadow.c
+++ b/r_shadow.c
@@ -4452,26 +4452,33 @@ void R_DrawModelShadowMaps(void)
        R_Viewport_InitOrtho(&viewport, &cameramatrix, 0, 0, size, size, 0, 0, 1, 1, 0, -1, NULL); 
 
        VectorMA(shadoworigin, (1.0f - fabs(dot1)) * radius, shadowforward, shadoworigin);
- 
-#if 0
-       R_Mesh_ResetRenderTargets();
-       R_SetupShader_ShowDepth();
-#else
+
        R_Mesh_SetRenderTargets(fbo, r_shadow_shadowmap2dtexture, NULL, NULL, NULL, NULL);
        R_SetupShader_DepthOrShadow();
-#endif
        GL_PolygonOffset(r_shadow_shadowmapping_polygonfactor.value, r_shadow_shadowmapping_polygonoffset.value);
        GL_DepthMask(true);
        GL_DepthTest(true);
        R_SetViewport(&viewport);
        GL_Scissor(viewport.x, viewport.y, min(viewport.width + r_shadow_shadowmapborder, 2*r_shadow_shadowmapmaxsize), viewport.height + r_shadow_shadowmapborder);
        Vector4Set(clearcolor, 1,1,1,1);
+       // in D3D9 we have to render to a color texture shadowmap
+       // in GL we render directly to a depth texture only
+       if (r_shadow_shadowmap2dtexture)
+               GL_Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT, clearcolor, 1.0f, 0);
+       else
+               GL_Clear(GL_DEPTH_BUFFER_BIT, clearcolor, 1.0f, 0);
+       // render into a slightly restricted region so that the borders of the
+       // shadowmap area fade away, rather than streaking across everything
+       // outside the usable area
+       GL_Scissor(viewport.x + r_shadow_shadowmapborder, viewport.y + r_shadow_shadowmapborder, viewport.width - 2*r_shadow_shadowmapborder, viewport.height - 2*r_shadow_shadowmapborder);
+
 #if 0
+       // debugging
+       R_Mesh_ResetRenderTargets();
+       R_SetupShader_ShowDepth();
+       GL_ColorMask(1,1,1,1);
        GL_Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT, clearcolor, 1.0f, 0);
-#else
-       GL_Clear(GL_DEPTH_BUFFER_BIT, clearcolor, 1.0f, 0);
 #endif
-       GL_Scissor(viewport.x + r_shadow_shadowmapborder, viewport.y + r_shadow_shadowmapborder, viewport.width - 2*r_shadow_shadowmapborder, viewport.height - 2*r_shadow_shadowmapborder);
 
        for (i = 0;i < r_refdef.scene.numentities;i++)
        {
@@ -4497,6 +4504,19 @@ void R_DrawModelShadowMaps(void)
                }
        }
 
+#if 0
+       if (r_test.integer)
+       {
+               unsigned char *rawpixels = Z_Malloc(viewport.width*viewport.height*4);
+               CHECKGLERROR
+               qglReadPixels(viewport.x, viewport.y, viewport.width, viewport.height, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, rawpixels);
+               CHECKGLERROR
+               Image_WriteTGABGRA("r_shadows_2.tga", viewport.width, viewport.height, rawpixels);
+               Cvar_SetValueQuick(&r_test, 0);
+               Z_Free(rawpixels);
+       }
+#endif
+
        R_Shadow_RenderMode_End();
 
        Matrix4x4_Concat(&mvpmatrix, &r_refdef.view.viewport.projectmatrix, &r_refdef.view.viewport.viewmatrix);