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-rw-r--r--src/mesa/main/occlude.c314
1 files changed, 314 insertions, 0 deletions
diff --git a/src/mesa/main/occlude.c b/src/mesa/main/occlude.c
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+/*
+ * Mesa 3-D graphics library
+ * Version: 5.1
+ *
+ * Copyright (C) 1999-2003 Brian Paul 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 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
+ * BRIAN PAUL 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.
+ */
+
+
+/*
+ * \brief Functions to implement the GL_ARB_occlusion_query extension.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "hash.h"
+#include "imports.h"
+#include "occlude.h"
+#include "mtypes.h"
+
+#ifndef GL_SAMPLES_PASSED_ARB
+#define GL_SAMPLES_PASSED_ARB 0x8914
+#define GL_QUERY_COUNTER_BITS_ARB 0x8864
+#define GL_CURRENT_QUERY_ARB 0x8865
+#define GL_QUERY_RESULT_ARB 0x8866
+#define GL_QUERY_RESULT_AVAILABLE_ARB 0x8867
+#endif
+
+
+struct occlusion_query
+{
+ GLenum Target;
+ GLuint Id;
+ GLuint PassedCounter;
+ GLboolean Active;
+};
+
+
+/**
+ * Allocate a new occlusion query object.
+ * \param target - must be GL_SAMPLES_PASSED_ARB at this time
+ * \param id - the object's ID
+ * \return pointer to new occlusion_query object or NULL if out of memory.
+ */
+static struct occlusion_query *
+new_query_object(GLenum target, GLuint id)
+{
+ struct occlusion_query *q = MALLOC_STRUCT(occlusion_query);
+ if (q) {
+ q->Target = target;
+ q->Id = id;
+ q->PassedCounter = 0;
+ q->Active = GL_FALSE;
+ }
+ return q;
+}
+
+
+/**
+ * Delete an occlusion query object.
+ */
+static void
+delete_query_object(struct occlusion_query *q)
+{
+ FREE(q);
+}
+
+
+void
+_mesa_GenQueriesARB(GLsizei n, GLuint *ids)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ GLuint first;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (n < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glGenQueriesARB(n < 0)");
+ return;
+ }
+
+ if (ctx->Occlusion.Active) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGenQueriesARB");
+ return;
+ }
+
+ first = _mesa_HashFindFreeKeyBlock(ctx->Occlusion.QueryObjects, n);
+ if (first) {
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ struct occlusion_query *q = new_query_object(GL_SAMPLES_PASSED_ARB,
+ first + i);
+ if (!q) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenQueriesARB");
+ return;
+ }
+ ids[i] = first + i;
+ _mesa_HashInsert(ctx->Occlusion.QueryObjects, first + i, q);
+ }
+ }
+}
+
+
+void
+_mesa_DeleteQueriesARB(GLsizei n, const GLuint *ids)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ GLint i;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (n < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteQueriesARB(n < 0)");
+ return;
+ }
+
+ if (ctx->Occlusion.Active) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glDeleteQueriesARB");
+ return;
+ }
+
+ for (i = 0; i < n; i++) {
+ if (ids[i] > 0) {
+ struct occlusion_query *q = (struct occlusion_query *)
+ _mesa_HashLookup(ctx->Occlusion.QueryObjects, ids[i]);
+ if (q) {
+ _mesa_HashRemove(ctx->Occlusion.QueryObjects, ids[i]);
+ delete_query_object(q);
+ }
+ }
+ }
+}
+
+
+GLboolean
+_mesa_IsQueryARB(GLuint id)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+
+ if (id && _mesa_HashLookup(ctx->Occlusion.QueryObjects, id))
+ return GL_TRUE;
+ else
+ return GL_FALSE;
+}
+
+
+void
+_mesa_BeginQueryARB(GLenum target, GLuint id)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct occlusion_query *q;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ FLUSH_VERTICES(ctx, _NEW_DEPTH);
+
+ if (target != GL_SAMPLES_PASSED_ARB) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glBeginQueryARB(target)");
+ return;
+ }
+
+ if (ctx->Occlusion.CurrentQueryObject) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glBeginQueryARB(target)");
+ return;
+ }
+
+ q = (struct occlusion_query *)
+ _mesa_HashLookup(ctx->Occlusion.QueryObjects, id);
+ if (q && q->Active) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glBeginQueryARB");
+ return;
+ }
+ else if (!q) {
+ q = new_query_object(target, id);
+ if (!q) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBeginQueryARB");
+ return;
+ }
+ _mesa_HashInsert(ctx->Occlusion.QueryObjects, id, q);
+ }
+
+ q->Active = GL_TRUE;
+ q->PassedCounter = 0;
+ ctx->Occlusion.Active = GL_TRUE;
+ ctx->Occlusion.CurrentQueryObject = id;
+ ctx->Occlusion.PassedCounter = 0;
+}
+
+
+void
+_mesa_EndQueryARB(GLenum target)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct occlusion_query *q;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ FLUSH_VERTICES(ctx, _NEW_DEPTH);
+
+ if (target != GL_SAMPLES_PASSED_ARB) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glEndQueryARB(target)");
+ return;
+ }
+
+ q = (struct occlusion_query *)
+ _mesa_HashLookup(ctx->Occlusion.QueryObjects,
+ ctx->Occlusion.CurrentQueryObject);
+ if (!q || !q->Active) {
+ _mesa_problem(ctx, "bad query object in glEndQueryARB");
+ return;
+ }
+
+ q->PassedCounter = ctx->Occlusion.PassedCounter;
+ q->Active = GL_FALSE;
+ ctx->Occlusion.Active = GL_FALSE;
+ ctx->Occlusion.CurrentQueryObject = 0;
+}
+
+
+void
+_mesa_GetQueryivARB(GLenum target, GLenum pname, GLint *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (target != GL_SAMPLES_PASSED_ARB) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetQueryivARB(target)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_QUERY_COUNTER_BITS_ARB:
+ *params = 8 * sizeof(GLuint);
+ break;
+ case GL_CURRENT_QUERY_ARB:
+ *params = ctx->Occlusion.CurrentQueryObject;
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetQueryivARB(pname)");
+ return;
+ }
+}
+
+
+void
+_mesa_GetQueryObjectivARB(GLuint id, GLenum pname, GLint *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct occlusion_query *q;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ q = (struct occlusion_query *)
+ _mesa_HashLookup(ctx->Occlusion.QueryObjects, id);
+ if (!q || q->Active) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetQueryObjectivARB");
+ return;
+ }
+
+ switch (pname) {
+ case GL_QUERY_RESULT_ARB:
+ *params = q->PassedCounter;
+ break;
+ case GL_QUERY_RESULT_AVAILABLE_ARB:
+ /* XXX revisit when we have a hardware implementation! */
+ *params = GL_TRUE;
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetQueryObjectivARB(pname)");
+ return;
+ }
+}
+
+
+void
+_mesa_GetQueryObjectuivARB(GLuint id, GLenum pname, GLuint *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct occlusion_query *q;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ q = (struct occlusion_query *)
+ _mesa_HashLookup(ctx->Occlusion.QueryObjects, id);
+ if (!q || q->Active) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetQueryObjectuivARB");
+ return;
+ }
+
+ switch (pname) {
+ case GL_QUERY_RESULT_ARB:
+ *params = q->PassedCounter;
+ break;
+ case GL_QUERY_RESULT_AVAILABLE_ARB:
+ /* XXX revisit when we have a hardware implementation! */
+ *params = GL_TRUE;
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetQueryObjectuivARB(pname)");
+ return;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-20 14:39:52 +0000