| 1 | /* Copyright (c) 2001, Stanford University
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| 2 | * All rights reserved.
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| 3 | *
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| 4 | * See the file LICENSE.txt for information on redistributing this software.
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| 5 | */
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| 6 |
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| 7 | #ifndef CR_STATE_STENCIL_H
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| 8 | #define CR_STATE_STENCIL_H
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| 9 |
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| 10 | #include "cr_glstate.h"
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| 11 | #include "state/cr_statetypes.h"
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| 12 |
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| 13 | #include <iprt/cdefs.h>
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| 14 | #include <iprt/assert.h>
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| 15 |
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| 16 | #ifdef __cplusplus
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| 17 | extern "C" {
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| 18 | #endif
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| 19 |
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| 20 | #define CRSTATE_STENCIL_BUFFER_ID_FRONT 0
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| 21 | #define CRSTATE_STENCIL_BUFFER_ID_BACK 1
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| 22 | #define CRSTATE_STENCIL_BUFFER_ID_TWO_SIDE_BACK 2
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| 23 | #define CRSTATE_STENCIL_BUFFER_COUNT 3
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| 24 |
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| 25 | /* stencil buffer settings were accessed with StencilXxx with ActiveStencilFaceEXT == GL_FRONT or StencilXxxSeparate(GL_FRONT_AND_BACK) */
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| 26 | #define CRSTATE_STENCIL_BUFFER_REF_ID_FRONT_AND_BACK 0
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| 27 | /* stencil buffer settings were accessed with StencilXxxSeparate(GL_FRONT_FRONT) */
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| 28 | #define CRSTATE_STENCIL_BUFFER_REF_ID_FRONT 1
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| 29 | /* stencil buffer settings were accessed with StencilXxxSeparate(GL_FRONT_BACK) */
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| 30 | #define CRSTATE_STENCIL_BUFFER_REF_ID_BACK 2
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| 31 | /* stencil buffer settings were accessed with StencilXxx with ActiveStencilFaceEXT == GL_BACK */
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| 32 | #define CRSTATE_STENCIL_BUFFER_REF_ID_TWO_SIDE_BACK 3
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| 33 | #define CRSTATE_STENCIL_BUFFER_REF_COUNT 4
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| 34 |
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| 35 | typedef struct {
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| 36 | CRbitvalue dirty[CR_MAX_BITARRAY];
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| 37 | CRbitvalue enable[CR_MAX_BITARRAY];
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| 38 | CRbitvalue func[CR_MAX_BITARRAY];
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| 39 | CRbitvalue op[CR_MAX_BITARRAY];
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| 40 | CRbitvalue clearValue[CR_MAX_BITARRAY];
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| 41 | CRbitvalue writeMask[CR_MAX_BITARRAY];
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| 42 | } CRStencilBits_v_33;
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| 43 |
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| 44 | typedef struct {
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| 45 | CRbitvalue func[CR_MAX_BITARRAY];
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| 46 | CRbitvalue op[CR_MAX_BITARRAY];
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| 47 | } CRStencilBufferRefBits;
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| 48 |
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| 49 | typedef struct {
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| 50 | CRbitvalue dirty[CR_MAX_BITARRAY];
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| 51 | CRbitvalue enable[CR_MAX_BITARRAY];
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| 52 | CRbitvalue enableTwoSideEXT[CR_MAX_BITARRAY];
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| 53 | CRbitvalue activeStencilFace[CR_MAX_BITARRAY];
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| 54 | CRbitvalue clearValue[CR_MAX_BITARRAY];
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| 55 | CRbitvalue writeMask[CR_MAX_BITARRAY];
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| 56 | /* note: here we use _BUFFER_REF_ rather than _REF_ because we track the way buffers are accessed here,
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| 57 | * to ensure the correct function is called on hw->chromium state restoration,
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| 58 | * i.e. we want to avoid always calling StencilXxxSeparate, but call StencilXxx when it was actually called */
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| 59 | CRStencilBufferRefBits bufferRefs[CRSTATE_STENCIL_BUFFER_REF_COUNT];
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| 60 | } CRStencilBits;
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| 61 |
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| 62 | typedef struct {
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| 63 | GLboolean stencilTest;
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| 64 | GLenum func;
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| 65 | GLint mask;
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| 66 | GLint ref;
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| 67 | GLenum fail;
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| 68 | GLenum passDepthFail;
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| 69 | GLenum passDepthPass;
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| 70 | GLint clearValue;
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| 71 | GLint writeMask;
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| 72 | } CRStencilState_v_33;
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| 73 |
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| 74 | typedef struct {
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| 75 | GLenum func;
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| 76 | GLint mask;
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| 77 | GLint ref;
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| 78 | GLenum fail;
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| 79 | GLenum passDepthFail;
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| 80 | GLenum passDepthPass;
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| 81 | } CRStencilBufferState;
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| 82 |
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| 83 | typedef struct {
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| 84 | /* true if stencil test is enabled */
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| 85 | GLboolean stencilTest;
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| 86 | /* true if GL_EXT_stencil_two_side is enabled (glEnable(GL_STENCIL_TEST_TWO_SIDE_EXT)) */
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| 87 | GLboolean stencilTwoSideEXT;
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| 88 | /* GL_FRONT or GL_BACK */
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| 89 | GLenum activeStencilFace;
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| 90 | GLint clearValue;
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| 91 | GLint writeMask;
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| 92 | CRStencilBufferState buffers[CRSTATE_STENCIL_BUFFER_COUNT];
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| 93 | } CRStencilState;
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| 94 |
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| 95 | DECLEXPORT(void) crStateStencilInit(CRContext *ctx);
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| 96 | DECLEXPORT(void) crStateStencilBufferInit(CRStencilBufferState *s);
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| 97 |
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| 98 | DECLEXPORT(void) crStateStencilDiff(CRStencilBits *bb, CRbitvalue *bitID,
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| 99 | CRContext *fromCtx, CRContext *toCtx);
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| 100 | DECLEXPORT(void) crStateStencilSwitch(CRStencilBits *bb, CRbitvalue *bitID,
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| 101 | CRContext *fromCtx, CRContext *toCtx);
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| 102 |
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| 103 | #ifdef __cplusplus
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| 104 | }
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| 105 | #endif
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| 106 |
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| 107 | #endif /* CR_STATE_STENCIL_H */
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