From 5910dfacf100f3748a732cc262a7913e2922016e Mon Sep 17 00:00:00 2001 From: Ian Romanick Date: Wed, 30 Nov 2005 00:06:48 +0000 Subject: This is a major re-work of the __indirect_glInterleavedArrays routine. The big, ugly, error prone switch-statement is replaced with a compact table. I also added numerous comments, including a comment explaining how the format parameter is validated. Explicitly pass GL_FLOAT as the type in the cases where that is the only possible value (e.g., everywhere except the call to glColorPointer). Validate that stride is >= 0. Tested with all modes (including the two error modes) of progs/tests/interleave.c. Bug: #5001, #5058 Reviewed by: Brian Paul --- src/glx/x11/vertarr.c | 222 ++++++++++++++++++++------------------------------ 1 file changed, 89 insertions(+), 133 deletions(-) (limited to 'src/glx/x11') diff --git a/src/glx/x11/vertarr.c b/src/glx/x11/vertarr.c index 77c51468ec..483a166ea2 100644 --- a/src/glx/x11/vertarr.c +++ b/src/glx/x11/vertarr.c @@ -94,154 +94,110 @@ void __indirect_glInterleavedArrays(GLenum format, GLsizei stride, const GLvoid { __GLXcontext *gc = __glXGetCurrentContext(); __GLXattribute * state = (__GLXattribute *)(gc->client_state_private); - GLboolean tEnable = GL_FALSE, cEnable = GL_FALSE, nEnable = GL_FALSE; - GLenum tType = GL_FLOAT, nType = GL_FLOAT, vType = GL_FLOAT; - GLenum cType = GL_FALSE; - GLint tSize = 0, cSize = 0, nSize = 3, vSize; - int cOffset = 0, nOffset = 0, vOffset = 0; + +#define NONE {0, 0, 0} +#define F(x) {GL_FLOAT, x, x * sizeof(GLfloat)} +#define UB4 {GL_UNSIGNED_BYTE, 4, 4 * sizeof(GLubyte)} + + /* Each row in this array describes the elements of a particular + * interleaved array mode. Each column describes, in the order in which + * they appear in the interleaved arrays, one of the four possible types + * of vertex data that can appear in an interleaved array. + */ + struct { + /** + * The enum describing the GL type, as would be passed to the + * appropriate gl*Pointer function. + */ + GLushort type; + + /** + * Number of elements in the subarray, as would be passed (as the + * \c size parameter) to the appropriate gl*Pointer function. + */ + GLubyte count; + + /** + * True size of a single element in the subarray, as would be passed + * (as the \c stride parameter) to the appropriate gl*Pointer + * function. + */ + GLubyte size; + } + static const modes[14][4] = { + /* texture color normal vertex */ + {NONE, NONE, NONE, F(2)}, /* GL_V2F */ + {NONE, NONE, NONE, F(3)}, /* GL_V3F */ + {NONE, UB4, NONE, F(2)}, /* GL_C4UB_V2F */ + {NONE, UB4, NONE, F(3)}, /* GL_C4UB_V3F */ + {NONE, F(3), NONE, F(3)}, /* GL_C3F_V3F */ + {NONE, NONE, F(3), F(3)}, /* GL_N3F_V3F */ + {NONE, F(4), F(3), F(3)}, /* GL_C4F_N3F_V3F */ + {F(2), NONE, NONE, F(3)}, /* GL_T2F_V3F */ + {F(4), NONE, NONE, F(4)}, /* GL_T4F_V4F */ + {F(2), UB4, NONE, F(3)}, /* GL_T2F_C4UB_V3F */ + {F(2), F(3), NONE, F(3)}, /* GL_T2F_C3F_V3F */ + {F(2), NONE, F(3), F(3)}, /* GL_T2F_N3F_V3F */ + {F(2), F(4), F(3), F(3)}, /* GL_T2F_C4F_N3F_V3F */ + {F(4), F(4), F(3), F(4)}, /* GL_T4F_C4F_N3F_V4F */ + }; +#undef NONE +#undef F +#undef UB4 + GLint trueStride, size; + int offsets[4]; + unsigned i; + const int idx = format - GL_V2F; - switch (format) { - case GL_V2F: - vSize = 2; - size = __glXTypeSize(vType) * vSize; - break; - case GL_V3F: - vSize = 3; - size = __glXTypeSize(vType) * vSize; - break; - case GL_C4UB_V2F: - cEnable = GL_TRUE; - cSize = 4; - cType = GL_UNSIGNED_BYTE; - vSize = 2; - vOffset = __glXTypeSize(cType) * cSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_C4UB_V3F: - cEnable = GL_TRUE; - cSize = 4; - cType = GL_UNSIGNED_BYTE; - vSize = 3; - vOffset = __glXTypeSize(vType) * cSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_C3F_V3F: - cEnable = GL_TRUE; - cSize = 3; - cType = GL_FLOAT; - vSize = 3; - vOffset = __glXTypeSize(cType) * cSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_N3F_V3F: - nEnable = GL_TRUE; - vSize = 3; - vOffset = __glXTypeSize(nType) * nSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_C4F_N3F_V3F: - cEnable = GL_TRUE; - cSize = 4; - cType = GL_FLOAT; - nEnable = GL_TRUE; - nOffset = __glXTypeSize(cType) * cSize; - vSize = 3; - vOffset = nOffset + __glXTypeSize(nType) * nSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_T2F_V3F: - tEnable = GL_TRUE; - tSize = 2; - vSize = 3; - vOffset = __glXTypeSize(tType) * tSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_T4F_V4F: - tEnable = GL_TRUE; - tSize = 4; - vSize = 4; - vOffset = __glXTypeSize(tType) * tSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_T2F_C4UB_V3F: - tEnable = GL_TRUE; - tSize = 2; - cEnable = GL_TRUE; - cSize = 4; - cType = GL_UNSIGNED_BYTE; - cOffset = __glXTypeSize(tType) * tSize; - vSize = 3; - vOffset = cOffset + __glXTypeSize(cType) * cSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_T2F_C3F_V3F: - tEnable = GL_TRUE; - tSize = 2; - cEnable = GL_TRUE; - cSize = 3; - cType = GL_FLOAT; - cOffset = __glXTypeSize(tType) * tSize; - vSize = 3; - vOffset = cOffset + __glXTypeSize(cType) * cSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_T2F_N3F_V3F: - tEnable = GL_TRUE; - tSize = 2; - nEnable = GL_TRUE; - nOffset = __glXTypeSize(tType) * tSize; - vSize = 3; - vOffset = nOffset + __glXTypeSize(nType) * nSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_T2F_C4F_N3F_V3F: - tEnable = GL_TRUE; - tSize = 2; - cEnable = GL_TRUE; - cSize = 4; - cType = GL_FLOAT; - cOffset = __glXTypeSize(tType) * tSize; - nEnable = GL_TRUE; - nOffset = cOffset + __glXTypeSize(cType) * cSize; - vSize = 3; - vOffset = nOffset + __glXTypeSize(nType) * nSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - case GL_T4F_C4F_N3F_V4F: - tEnable = GL_TRUE; - tSize = 4; - cEnable = GL_TRUE; - cSize = 4; - cType = GL_FLOAT; - cOffset = __glXTypeSize(tType) * tSize; - nEnable = GL_TRUE; - nOffset = cOffset + __glXTypeSize(cType) * cSize; - vSize = 4; - vOffset = nOffset + __glXTypeSize(nType) * nSize; - size = vOffset + __glXTypeSize(vType) * vSize; - break; - default: + + /* All valid formats are on the range [GL_V2F, GL_V2F+0x0D]. Since idx + * is just the format biased by -GL_V2F, all valid idx values are on the + * range [0, 0x0D]. + */ + if ( (idx < 0) || (idx > 0x0D) ) { __glXSetError(gc, GL_INVALID_ENUM); return; } + if ( stride < 0 ) { + __glXSetError(gc, GL_INVALID_VALUE); + return; + } + + + /* If the 'count' for a subarray is non-zero, then the offset of its + * first element is at the currently accumulated 'size'. + */ + size = 0; + for ( i = 0 ; i < 4 ; i++ ) { + offsets[i] = (modes[idx][i].count != 0) ? size : -1; + size += modes[idx][i].size; + } + trueStride = (stride == 0) ? size : stride; __glXArrayDisableAll( state ); - if (tEnable) { + if ( offsets[0] >= 0 ) { __indirect_glEnableClientState(GL_TEXTURE_COORD_ARRAY); - __indirect_glTexCoordPointer(tSize, tType, trueStride, (const char *)pointer); + __indirect_glTexCoordPointer( modes[idx][0].count, GL_FLOAT, + trueStride, + (const char *) pointer ); } - if (cEnable) { + if ( offsets[1] >= 0 ) { __indirect_glEnableClientState(GL_COLOR_ARRAY); - __indirect_glColorPointer(cSize, cType, trueStride, (const char *)pointer+cOffset); + __indirect_glColorPointer( modes[idx][1].count, modes[idx][1].type, + trueStride, + (const char *) pointer + offsets[1] ); } - if (nEnable) { + if ( offsets[2] >= 0 ) { __indirect_glEnableClientState(GL_NORMAL_ARRAY); - __indirect_glNormalPointer(nType, trueStride, (const char *)pointer+nOffset); + __indirect_glNormalPointer( GL_FLOAT, trueStride, + (const char *)pointer + offsets[2] ); } __indirect_glEnableClientState(GL_VERTEX_ARRAY); - __indirect_glVertexPointer(vSize, vType, trueStride, (const char *)pointer+vOffset); + __indirect_glVertexPointer( modes[idx][3].count, GL_FLOAT, + trueStride, + (const char *)pointer + offsets[3] ); } -- cgit v1.2.3