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| Rev | Author | Line No. | Line |
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| 1901 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
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| 3 | * Version: 6.5 |
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| 4 | * |
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| 5 | * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. |
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| 6 | * |
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| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 8 | * copy of this software and associated documentation files (the "Software"), |
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| 9 | * to deal in the Software without restriction, including without limitation |
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| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 12 | * Software is furnished to do so, subject to the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice shall be included |
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| 15 | * in all copies or substantial portions of the Software. |
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| 16 | * |
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| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 20 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
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| 21 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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| 22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 23 | */ |
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| 24 | |||
| 25 | #include "glheader.h" |
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| 26 | #include "accum.h" |
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| 27 | #include "context.h" |
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| 28 | #include "imports.h" |
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| 29 | #include "macros.h" |
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| 30 | #include "state.h" |
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| 31 | #include "mtypes.h" |
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| 32 | #include "main/dispatch.h" |
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| 33 | |||
| 34 | |||
| 35 | #if FEATURE_accum |
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| 36 | |||
| 37 | |||
| 38 | void GLAPIENTRY |
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| 39 | _mesa_ClearAccum( GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha ) |
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| 40 | { |
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| 41 | GLfloat tmp[4]; |
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| 42 | GET_CURRENT_CONTEXT(ctx); |
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| 43 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 44 | |||
| 45 | tmp[0] = CLAMP( red, -1.0F, 1.0F ); |
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| 46 | tmp[1] = CLAMP( green, -1.0F, 1.0F ); |
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| 47 | tmp[2] = CLAMP( blue, -1.0F, 1.0F ); |
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| 48 | tmp[3] = CLAMP( alpha, -1.0F, 1.0F ); |
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| 49 | |||
| 50 | if (TEST_EQ_4V(tmp, ctx->Accum.ClearColor)) |
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| 51 | return; |
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| 52 | |||
| 53 | FLUSH_VERTICES(ctx, _NEW_ACCUM); |
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| 54 | COPY_4FV( ctx->Accum.ClearColor, tmp ); |
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| 55 | } |
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| 56 | |||
| 57 | |||
| 58 | static void GLAPIENTRY |
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| 59 | _mesa_Accum( GLenum op, GLfloat value ) |
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| 60 | { |
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| 61 | GET_CURRENT_CONTEXT(ctx); |
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| 62 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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| 63 | |||
| 64 | switch (op) { |
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| 65 | case GL_ADD: |
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| 66 | case GL_MULT: |
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| 67 | case GL_ACCUM: |
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| 68 | case GL_LOAD: |
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| 69 | case GL_RETURN: |
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| 70 | /* OK */ |
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| 71 | break; |
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| 72 | default: |
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| 73 | _mesa_error(ctx, GL_INVALID_ENUM, "glAccum(op)"); |
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| 74 | return; |
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| 75 | } |
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| 76 | |||
| 77 | if (ctx->DrawBuffer->Visual.haveAccumBuffer == 0) { |
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| 78 | _mesa_error(ctx, GL_INVALID_OPERATION, "glAccum(no accum buffer)"); |
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| 79 | return; |
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| 80 | } |
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| 81 | |||
| 82 | if (ctx->DrawBuffer != ctx->ReadBuffer) { |
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| 83 | /* See GLX_SGI_make_current_read or WGL_ARB_make_current_read, |
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| 84 | * or GL_EXT_framebuffer_blit. |
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| 85 | */ |
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| 86 | _mesa_error(ctx, GL_INVALID_OPERATION, |
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| 87 | "glAccum(different read/draw buffers)"); |
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| 88 | return; |
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| 89 | } |
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| 90 | |||
| 91 | if (ctx->NewState) |
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| 92 | _mesa_update_state(ctx); |
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| 93 | |||
| 94 | if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { |
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| 95 | _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, |
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| 96 | "glAccum(incomplete framebuffer)"); |
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| 97 | return; |
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| 98 | } |
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| 99 | |||
| 100 | if (ctx->RenderMode == GL_RENDER) { |
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| 101 | ctx->Driver.Accum(ctx, op, value); |
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| 102 | } |
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| 103 | } |
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| 104 | |||
| 105 | |||
| 106 | void |
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| 107 | _mesa_init_accum_dispatch(struct _glapi_table *disp) |
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| 108 | { |
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| 109 | SET_Accum(disp, _mesa_Accum); |
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| 110 | SET_ClearAccum(disp, _mesa_ClearAccum); |
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| 111 | } |
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| 112 | |||
| 113 | |||
| 114 | #endif /* FEATURE_accum */ |
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| 115 | |||
| 116 | |||
| 117 | void |
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| 118 | _mesa_init_accum( struct gl_context *ctx ) |
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| 119 | { |
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| 120 | /* Accumulate buffer group */ |
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| 121 | ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 ); |
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| 122 | } |