-/* $Id: accum.c,v 1.35 2001/01/29 20:47:39 keithw Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 6.5
*
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2005 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"),
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
#include "glheader.h"
#include "accum.h"
#include "context.h"
+#include "imports.h"
#include "macros.h"
-#include "mem.h"
#include "state.h"
#include "mtypes.h"
-#endif
-
-
-void
+void GLAPIENTRY
_mesa_ClearAccum( GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha )
{
GLfloat tmp[4];
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
- tmp[0] = CLAMP( red, -1.0, 1.0 );
- tmp[1] = CLAMP( green, -1.0, 1.0 );
- tmp[2] = CLAMP( blue, -1.0, 1.0 );
- tmp[3] = CLAMP( alpha, -1.0, 1.0 );
+ tmp[0] = CLAMP( red, -1.0F, 1.0F );
+ tmp[1] = CLAMP( green, -1.0F, 1.0F );
+ tmp[2] = CLAMP( blue, -1.0F, 1.0F );
+ tmp[3] = CLAMP( alpha, -1.0F, 1.0F );
if (TEST_EQ_4V(tmp, ctx->Accum.ClearColor))
return;
COPY_4FV( ctx->Accum.ClearColor, tmp );
}
-/* Should really be a driver-supplied function?
- */
-void
+
+void GLAPIENTRY
_mesa_Accum( GLenum op, GLfloat value )
{
GET_CURRENT_CONTEXT(ctx);
- GLuint xpos, ypos, width, height;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- if (ctx->Visual.accumRedBits == 0 || ctx->DrawBuffer != ctx->ReadBuffer) {
- gl_error(ctx, GL_INVALID_OPERATION, "glAccum");
+ switch (op) {
+ case GL_ADD:
+ case GL_MULT:
+ case GL_ACCUM:
+ case GL_LOAD:
+ case GL_RETURN:
+ /* OK */
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glAccum(op)");
+ return;
+ }
+
+ if (ctx->DrawBuffer->Visual.haveAccumBuffer == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glAccum(no accum buffer)");
+ return;
+ }
+
+ if (ctx->DrawBuffer != ctx->ReadBuffer) {
+ /* See GLX_SGI_make_current_read or WGL_ARB_make_current_read,
+ * or GL_EXT_framebuffer_blit.
+ */
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glAccum(different read/draw buffers)");
return;
}
if (ctx->NewState)
- gl_update_state( ctx );
-
- /* Determine region to operate upon. */
- if (ctx->Scissor.Enabled) {
- xpos = ctx->Scissor.X;
- ypos = ctx->Scissor.Y;
- width = ctx->Scissor.Width;
- height = ctx->Scissor.Height;
+ _mesa_update_state(ctx);
+
+ if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
+ "glAccum(incomplete framebuffer)");
+ return;
}
- else {
- /* whole window */
- xpos = 0;
- ypos = 0;
- width = ctx->DrawBuffer->Width;
- height = ctx->DrawBuffer->Height;
+
+ if (ctx->RenderMode == GL_RENDER) {
+ ctx->Driver.Accum(ctx, op, value);
}
+}
+
- ctx->Driver.Accum( ctx, op, value, xpos, ypos, width, height );
+
+void
+_mesa_init_accum( GLcontext *ctx )
+{
+ /* Accumulate buffer group */
+ ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 );
}