| 0,0 → 1,122 |
|---|
| /* |
| * Mesa 3-D graphics library |
| * Version: 6.5 |
| * |
| * 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"), |
| * 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. |
| */ |
| |
| #include "glheader.h" |
| #include "accum.h" |
| #include "context.h" |
| #include "imports.h" |
| #include "macros.h" |
| #include "state.h" |
| #include "mtypes.h" |
| #include "main/dispatch.h" |
| |
| |
| #if FEATURE_accum |
| |
| |
| 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, -1.0F, 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; |
| |
| FLUSH_VERTICES(ctx, _NEW_ACCUM); |
| COPY_4FV( ctx->Accum.ClearColor, tmp ); |
| } |
| |
| |
| static void GLAPIENTRY |
| _mesa_Accum( GLenum op, GLfloat value ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
| |
| 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) |
| _mesa_update_state(ctx); |
| |
| if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { |
| _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, |
| "glAccum(incomplete framebuffer)"); |
| return; |
| } |
| |
| if (ctx->RenderMode == GL_RENDER) { |
| ctx->Driver.Accum(ctx, op, value); |
| } |
| } |
| |
| |
| void |
| _mesa_init_accum_dispatch(struct _glapi_table *disp) |
| { |
| SET_Accum(disp, _mesa_Accum); |
| SET_ClearAccum(disp, _mesa_ClearAccum); |
| } |
| |
| |
| #endif /* FEATURE_accum */ |
| |
| |
| void |
| _mesa_init_accum( struct gl_context *ctx ) |
| { |
| /* Accumulate buffer group */ |
| ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 ); |
| } |