/* * Mesa 3-D graphics library * * Copyright (C) 2009 VMware, Inc. All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ /** * \file condrender.c * Conditional rendering functions * * \author Brian Paul */ #include "glheader.h" #include "condrender.h" #include "enums.h" #include "mtypes.h" #include "queryobj.h" void GLAPIENTRY _mesa_BeginConditionalRender(GLuint queryId, GLenum mode) { struct gl_query_object *q = NULL; GET_CURRENT_CONTEXT(ctx); /* Section 2.14 (Conditional Rendering) of the OpenGL 3.0 spec says: * * "If BeginConditionalRender is called while conditional rendering is * in progress, or if EndConditionalRender is called while conditional * rendering is not in progress, the error INVALID_OPERATION is * generated." */ if (!ctx->Extensions.NV_conditional_render || ctx->Query.CondRenderQuery) { _mesa_error(ctx, GL_INVALID_OPERATION, "glBeginConditionalRender()"); return; } ASSERT(ctx->Query.CondRenderMode == GL_NONE); /* Section 2.14 (Conditional Rendering) of the OpenGL 3.0 spec says: * * "The error INVALID_VALUE is generated if <id> is not the name of an * existing query object query." */ if (queryId != 0) q = _mesa_lookup_query_object(ctx, queryId); if (!q) { _mesa_error(ctx, GL_INVALID_VALUE, "glBeginConditionalRender(bad queryId=%u)", queryId); return; } ASSERT(q->Id == queryId); switch (mode) { case GL_QUERY_WAIT: case GL_QUERY_NO_WAIT: case GL_QUERY_BY_REGION_WAIT: case GL_QUERY_BY_REGION_NO_WAIT: break; /* OK */ case GL_QUERY_WAIT_INVERTED: case GL_QUERY_NO_WAIT_INVERTED: case GL_QUERY_BY_REGION_WAIT_INVERTED: case GL_QUERY_BY_REGION_NO_WAIT_INVERTED: if (ctx->Extensions.ARB_conditional_render_inverted) break; /* OK */ /* fallthrough - invalid */ default: _mesa_error(ctx, GL_INVALID_ENUM, "glBeginConditionalRender(mode=%s)", _mesa_lookup_enum_by_nr(mode)); return; } /* Section 2.14 (Conditional Rendering) of the OpenGL 3.0 spec says: * * "The error INVALID_OPERATION is generated if <id> is the name of a * query object with a target other than SAMPLES_PASSED, or <id> is the * name of a query currently in progress." */ if ((q->Target != GL_SAMPLES_PASSED && q->Target != GL_ANY_SAMPLES_PASSED && q->Target != GL_ANY_SAMPLES_PASSED_CONSERVATIVE) || q->Active) { _mesa_error(ctx, GL_INVALID_OPERATION, "glBeginConditionalRender()"); return; } ctx->Query.CondRenderQuery = q; ctx->Query.CondRenderMode = mode; if (ctx->Driver.BeginConditionalRender) ctx->Driver.BeginConditionalRender(ctx, q, mode); } void APIENTRY _mesa_EndConditionalRender(void) { GET_CURRENT_CONTEXT(ctx); FLUSH_VERTICES(ctx, 0x0); if (!ctx->Extensions.NV_conditional_render || !ctx->Query.CondRenderQuery) { _mesa_error(ctx, GL_INVALID_OPERATION, "glEndConditionalRender()"); return; } if (ctx->Driver.EndConditionalRender) ctx->Driver.EndConditionalRender(ctx, ctx->Query.CondRenderQuery); ctx->Query.CondRenderQuery = NULL; ctx->Query.CondRenderMode = GL_NONE; } /** * This function is called by software rendering commands (all point, * line triangle drawing, glClear, glDrawPixels, glCopyPixels, and * glBitmap, glBlitFramebuffer) to determine if subsequent drawing * commands should be * executed or discarded depending on the current conditional * rendering state. Ideally, this check would be implemented by the * GPU when doing hardware rendering. XXX should this function be * called via a new driver hook? * * \return GL_TRUE if we should render, GL_FALSE if we should discard */ GLboolean _mesa_check_conditional_render(struct gl_context *ctx) { struct gl_query_object *q = ctx->Query.CondRenderQuery; if (!q) { /* no query in progress - draw normally */ return GL_TRUE; } switch (ctx->Query.CondRenderMode) { case GL_QUERY_BY_REGION_WAIT: /* fall-through */ case GL_QUERY_WAIT: if (!q->Ready) { ctx->Driver.WaitQuery(ctx, q); } return q->Result > 0; case GL_QUERY_BY_REGION_WAIT_INVERTED: /* fall-through */ case GL_QUERY_WAIT_INVERTED: if (!q->Ready) { ctx->Driver.WaitQuery(ctx, q); } return q->Result == 0; case GL_QUERY_BY_REGION_NO_WAIT: /* fall-through */ case GL_QUERY_NO_WAIT: if (!q->Ready) ctx->Driver.CheckQuery(ctx, q); return q->Ready ? (q->Result > 0) : GL_TRUE; case GL_QUERY_BY_REGION_NO_WAIT_INVERTED: /* fall-through */ case GL_QUERY_NO_WAIT_INVERTED: if (!q->Ready) ctx->Driver.CheckQuery(ctx, q); return q->Ready ? (q->Result == 0) : GL_TRUE; default: _mesa_problem(ctx, "Bad cond render mode %s in " " _mesa_check_conditional_render()", _mesa_lookup_enum_by_nr(ctx->Query.CondRenderMode)); return GL_TRUE; } }