2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 #include "mfeatures.h"
33 #include "main/dispatch.h"
40 _mesa_ClearAccum( GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha )
43 GET_CURRENT_CONTEXT(ctx);
44 ASSERT_OUTSIDE_BEGIN_END(ctx);
46 tmp[0] = CLAMP( red, -1.0F, 1.0F );
47 tmp[1] = CLAMP( green, -1.0F, 1.0F );
48 tmp[2] = CLAMP( blue, -1.0F, 1.0F );
49 tmp[3] = CLAMP( alpha, -1.0F, 1.0F );
51 if (TEST_EQ_4V(tmp, ctx->Accum.ClearColor))
54 COPY_4FV( ctx->Accum.ClearColor, tmp );
58 static void GLAPIENTRY
59 _mesa_Accum( GLenum op, GLfloat value )
61 GET_CURRENT_CONTEXT(ctx);
62 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
73 _mesa_error(ctx, GL_INVALID_ENUM, "glAccum(op)");
77 if (ctx->DrawBuffer->Visual.haveAccumBuffer == 0) {
78 _mesa_error(ctx, GL_INVALID_OPERATION, "glAccum(no accum buffer)");
82 if (ctx->DrawBuffer != ctx->ReadBuffer) {
83 /* See GLX_SGI_make_current_read or WGL_ARB_make_current_read,
84 * or GL_EXT_framebuffer_blit.
86 _mesa_error(ctx, GL_INVALID_OPERATION,
87 "glAccum(different read/draw buffers)");
92 _mesa_update_state(ctx);
94 if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
95 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
96 "glAccum(incomplete framebuffer)");
100 if (ctx->RenderMode == GL_RENDER) {
101 ctx->Driver.Accum(ctx, op, value);
107 _mesa_init_accum_dispatch(struct _glapi_table *disp)
109 SET_Accum(disp, _mesa_Accum);
110 SET_ClearAccum(disp, _mesa_ClearAccum);
114 #endif /* FEATURE_accum */
118 _mesa_init_accum( struct gl_context *ctx )
120 /* Accumulate buffer group */
121 ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 );