mirror of https://gitlab.freedesktop.org/mesa/mesa
193 lines
5.8 KiB
C
193 lines
5.8 KiB
C
/*
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* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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*
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* SPDX-License-Identifier: SGI-B-2.0
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*/
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#include "glxclient.h"
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#include "indirect.h"
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#include "indirect_vertex_array.h"
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#ifndef GLX_USE_APPLEGL
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/*****************************************************************************/
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/**
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* \name Vertex array pointer bridge functions
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*
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* When EXT_vertex_array was moved into the core GL spec, the \c count
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* parameter was lost. This libGL really only wants to implement the GL 1.1
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* version, but we need to support applications that were written to the old
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* interface. These bridge functions are part of the glue that makes this
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* happen.
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*/
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/*@{*/
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void
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__indirect_glColorPointerEXT(GLint size, GLenum type, GLsizei stride,
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GLsizei count, const GLvoid * pointer)
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{
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(void) count;
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__indirect_glColorPointer(size, type, stride, pointer);
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}
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void
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__indirect_glEdgeFlagPointerEXT(GLsizei stride,
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GLsizei count, const GLboolean * pointer)
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{
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(void) count;
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__indirect_glEdgeFlagPointer(stride, pointer);
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}
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void
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__indirect_glIndexPointerEXT(GLenum type, GLsizei stride,
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GLsizei count, const GLvoid * pointer)
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{
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(void) count;
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__indirect_glIndexPointer(type, stride, pointer);
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}
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void
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__indirect_glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count,
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const GLvoid * pointer)
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{
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(void) count;
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__indirect_glNormalPointer(type, stride, pointer);
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}
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void
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__indirect_glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride,
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GLsizei count, const GLvoid * pointer)
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{
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(void) count;
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__indirect_glTexCoordPointer(size, type, stride, pointer);
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}
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void
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__indirect_glVertexPointerEXT(GLint size, GLenum type, GLsizei stride,
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GLsizei count, const GLvoid * pointer)
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{
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(void) count;
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__indirect_glVertexPointer(size, type, stride, pointer);
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}
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/*@}*/
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/*****************************************************************************/
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void
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__indirect_glInterleavedArrays(GLenum format, GLsizei stride,
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const GLvoid * pointer)
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{
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struct glx_context *gc = __glXGetCurrentContext();
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__GLXattribute *state = (__GLXattribute *) (gc->client_state_private);
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#define NONE {0, 0, 0}
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#define F(x) {GL_FLOAT, x, x * sizeof(GLfloat)}
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#define UB4 {GL_UNSIGNED_BYTE, 4, 4 * sizeof(GLubyte)}
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/* Each row in this array describes the elements of a particular
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* interleaved array mode. Each column describes, in the order in which
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* they appear in the interleaved arrays, one of the four possible types
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* of vertex data that can appear in an interleaved array.
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*/
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struct
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{
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/**
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* The enum describing the GL type, as would be passed to the
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* appropriate gl*Pointer function.
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*/
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GLushort type;
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/**
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* Number of elements in the subarray, as would be passed (as the
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* \c size parameter) to the appropriate gl*Pointer function.
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*/
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GLubyte count;
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/**
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* True size of a single element in the subarray, as would be passed
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* (as the \c stride parameter) to the appropriate gl*Pointer
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* function.
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*/
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GLubyte size;
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}
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static const modes[14][4] = {
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/* texture color normal vertex */
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{NONE, NONE, NONE, F(2)}, /* GL_V2F */
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{NONE, NONE, NONE, F(3)}, /* GL_V3F */
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{NONE, UB4, NONE, F(2)}, /* GL_C4UB_V2F */
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{NONE, UB4, NONE, F(3)}, /* GL_C4UB_V3F */
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{NONE, F(3), NONE, F(3)}, /* GL_C3F_V3F */
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{NONE, NONE, F(3), F(3)}, /* GL_N3F_V3F */
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{NONE, F(4), F(3), F(3)}, /* GL_C4F_N3F_V3F */
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{F(2), NONE, NONE, F(3)}, /* GL_T2F_V3F */
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{F(4), NONE, NONE, F(4)}, /* GL_T4F_V4F */
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{F(2), UB4, NONE, F(3)}, /* GL_T2F_C4UB_V3F */
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{F(2), F(3), NONE, F(3)}, /* GL_T2F_C3F_V3F */
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{F(2), NONE, F(3), F(3)}, /* GL_T2F_N3F_V3F */
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{F(2), F(4), F(3), F(3)}, /* GL_T2F_C4F_N3F_V3F */
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{F(4), F(4), F(3), F(4)}, /* GL_T4F_C4F_N3F_V4F */
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};
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#undef NONE
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#undef F
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#undef UB4
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GLint trueStride, size;
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int offsets[4];
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unsigned i;
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const int idx = format - GL_V2F;
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/* All valid formats are on the range [GL_V2F, GL_V2F+0x0D]. Since idx
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* is just the format biased by -GL_V2F, all valid idx values are on the
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* range [0, 0x0D].
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*/
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if ((idx < 0) || (idx > 0x0D)) {
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__glXSetError(gc, GL_INVALID_ENUM);
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return;
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}
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if (stride < 0) {
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__glXSetError(gc, GL_INVALID_VALUE);
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return;
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}
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/* If the 'count' for a subarray is non-zero, then the offset of its
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* first element is at the currently accumulated 'size'.
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*/
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size = 0;
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for (i = 0; i < 4; i++) {
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offsets[i] = (modes[idx][i].count != 0) ? size : -1;
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size += modes[idx][i].size;
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}
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trueStride = (stride == 0) ? size : stride;
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__glXArrayDisableAll(state);
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if (offsets[0] >= 0) {
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__indirect_glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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__indirect_glTexCoordPointer(modes[idx][0].count, GL_FLOAT,
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trueStride, (const char *) pointer);
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}
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if (offsets[1] >= 0) {
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__indirect_glEnableClientState(GL_COLOR_ARRAY);
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__indirect_glColorPointer(modes[idx][1].count, modes[idx][1].type,
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trueStride,
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(const char *) pointer + offsets[1]);
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}
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if (offsets[2] >= 0) {
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__indirect_glEnableClientState(GL_NORMAL_ARRAY);
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__indirect_glNormalPointer(GL_FLOAT, trueStride,
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(const char *) pointer + offsets[2]);
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}
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__indirect_glEnableClientState(GL_VERTEX_ARRAY);
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__indirect_glVertexPointer(modes[idx][3].count, GL_FLOAT,
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trueStride,
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(const char *) pointer + offsets[3]);
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}
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#endif
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