summaryrefslogtreecommitdiff
path: root/src/mesa/main/texgen.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mesa/main/texgen.c')
-rw-r--r--src/mesa/main/texgen.c400
1 files changed, 400 insertions, 0 deletions
diff --git a/src/mesa/main/texgen.c b/src/mesa/main/texgen.c
new file mode 100644
index 0000000000..108ea4cd42
--- /dev/null
+++ b/src/mesa/main/texgen.c
@@ -0,0 +1,400 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.5
+ *
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (C) 2009 VMware, Inc. 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.
+ */
+
+/**
+ * \file texgen.c
+ *
+ * glTexGen-related functions
+ */
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/enums.h"
+#include "main/macros.h"
+#include "main/texgen.h"
+#include "main/texstate.h"
+#include "math/m_matrix.h"
+#include "main/dispatch.h"
+
+
+#if FEATURE_texgen
+
+
+/**
+ * Return texgen state for given coordinate
+ */
+static struct gl_texgen *
+get_texgen(struct gl_texture_unit *texUnit, GLenum coord)
+{
+ switch (coord) {
+ case GL_S:
+ return &texUnit->GenS;
+ case GL_T:
+ return &texUnit->GenT;
+ case GL_R:
+ return &texUnit->GenR;
+ case GL_Q:
+ return &texUnit->GenQ;
+ default:
+ return NULL;
+ }
+}
+
+
+void GLAPIENTRY
+_mesa_TexGenfv( GLenum coord, GLenum pname, const GLfloat *params )
+{
+ struct gl_texture_unit *texUnit;
+ struct gl_texgen *texgen;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (MESA_VERBOSE&(VERBOSE_API|VERBOSE_TEXTURE))
+ _mesa_debug(ctx, "glTexGen %s %s %.1f(%s)...\n",
+ _mesa_lookup_enum_by_nr(coord),
+ _mesa_lookup_enum_by_nr(pname),
+ *params,
+ _mesa_lookup_enum_by_nr((GLenum) (GLint) *params));
+
+ if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glTexGen(current unit)");
+ return;
+ }
+
+ texUnit = _mesa_get_current_tex_unit(ctx);
+
+ texgen = get_texgen(texUnit, coord);
+ if (!texgen) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glTexGen(coord)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_TEXTURE_GEN_MODE:
+ {
+ GLenum mode = (GLenum) (GLint) params[0];
+ GLbitfield bit = 0x0;
+ if (texgen->Mode == mode)
+ return;
+ switch (mode) {
+ case GL_OBJECT_LINEAR:
+ bit = TEXGEN_OBJ_LINEAR;
+ break;
+ case GL_EYE_LINEAR:
+ bit = TEXGEN_EYE_LINEAR;
+ break;
+ case GL_SPHERE_MAP:
+ if (coord == GL_S || coord == GL_T)
+ bit = TEXGEN_SPHERE_MAP;
+ break;
+ case GL_REFLECTION_MAP_NV:
+ if (coord != GL_Q)
+ bit = TEXGEN_REFLECTION_MAP_NV;
+ break;
+ case GL_NORMAL_MAP_NV:
+ if (coord != GL_Q)
+ bit = TEXGEN_NORMAL_MAP_NV;
+ break;
+ default:
+ ; /* nop */
+ }
+ if (!bit) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(param)" );
+ return;
+ }
+ FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+ texgen->Mode = mode;
+ texgen->_ModeBit = bit;
+ }
+ break;
+
+ case GL_OBJECT_PLANE:
+ {
+ if (TEST_EQ_4V(texgen->ObjectPlane, params))
+ return;
+ FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+ COPY_4FV(texgen->ObjectPlane, params);
+ }
+ break;
+
+ case GL_EYE_PLANE:
+ {
+ GLfloat tmp[4];
+ /* Transform plane equation by the inverse modelview matrix */
+ if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top)) {
+ _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
+ }
+ _mesa_transform_vector(tmp, params,
+ ctx->ModelviewMatrixStack.Top->inv);
+ if (TEST_EQ_4V(texgen->EyePlane, tmp))
+ return;
+ FLUSH_VERTICES(ctx, _NEW_TEXTURE);
+ COPY_4FV(texgen->EyePlane, tmp);
+ }
+ break;
+
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glTexGenfv(pname)" );
+ return;
+ }
+
+ if (ctx->Driver.TexGen)
+ ctx->Driver.TexGen( ctx, coord, pname, params );
+}
+
+
+static void GLAPIENTRY
+_mesa_TexGeniv(GLenum coord, GLenum pname, const GLint *params )
+{
+ GLfloat p[4];
+ p[0] = (GLfloat) params[0];
+ if (pname == GL_TEXTURE_GEN_MODE) {
+ p[1] = p[2] = p[3] = 0.0F;
+ }
+ else {
+ p[1] = (GLfloat) params[1];
+ p[2] = (GLfloat) params[2];
+ p[3] = (GLfloat) params[3];
+ }
+ _mesa_TexGenfv(coord, pname, p);
+}
+
+
+static void GLAPIENTRY
+_mesa_TexGend(GLenum coord, GLenum pname, GLdouble param )
+{
+ GLfloat p[4];
+ p[0] = (GLfloat) param;
+ p[1] = p[2] = p[3] = 0.0F;
+ _mesa_TexGenfv( coord, pname, p );
+}
+
+#if FEATURE_ES1
+
+void GLAPIENTRY
+_es_GetTexGenfv(GLenum coord, GLenum pname, GLfloat *params)
+{
+ ASSERT(coord == GL_TEXTURE_GEN_STR_OES);
+ _mesa_GetTexGenfv(GL_S, pname, params);
+}
+
+
+void GLAPIENTRY
+_es_TexGenf(GLenum coord, GLenum pname, GLfloat param)
+{
+ ASSERT(coord == GL_TEXTURE_GEN_STR_OES);
+ /* set S, T, and R at the same time */
+ _mesa_TexGenf(GL_S, pname, param);
+ _mesa_TexGenf(GL_T, pname, param);
+ _mesa_TexGenf(GL_R, pname, param);
+}
+
+
+void GLAPIENTRY
+_es_TexGenfv(GLenum coord, GLenum pname, const GLfloat *params)
+{
+ ASSERT(coord == GL_TEXTURE_GEN_STR_OES);
+ /* set S, T, and R at the same time */
+ _mesa_TexGenfv(GL_S, pname, params);
+ _mesa_TexGenfv(GL_T, pname, params);
+ _mesa_TexGenfv(GL_R, pname, params);
+}
+
+#endif
+
+static void GLAPIENTRY
+_mesa_TexGendv(GLenum coord, GLenum pname, const GLdouble *params )
+{
+ GLfloat p[4];
+ p[0] = (GLfloat) params[0];
+ if (pname == GL_TEXTURE_GEN_MODE) {
+ p[1] = p[2] = p[3] = 0.0F;
+ }
+ else {
+ p[1] = (GLfloat) params[1];
+ p[2] = (GLfloat) params[2];
+ p[3] = (GLfloat) params[3];
+ }
+ _mesa_TexGenfv( coord, pname, p );
+}
+
+
+void GLAPIENTRY
+_mesa_TexGenf( GLenum coord, GLenum pname, GLfloat param )
+{
+ GLfloat p[4];
+ p[0] = param;
+ p[1] = p[2] = p[3] = 0.0F;
+ _mesa_TexGenfv(coord, pname, p);
+}
+
+
+void GLAPIENTRY
+_mesa_TexGeni( GLenum coord, GLenum pname, GLint param )
+{
+ GLint p[4];
+ p[0] = param;
+ p[1] = p[2] = p[3] = 0;
+ _mesa_TexGeniv( coord, pname, p );
+}
+
+
+
+static void GLAPIENTRY
+_mesa_GetTexGendv( GLenum coord, GLenum pname, GLdouble *params )
+{
+ struct gl_texture_unit *texUnit;
+ struct gl_texgen *texgen;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGendv(current unit)");
+ return;
+ }
+
+ texUnit = _mesa_get_current_tex_unit(ctx);
+
+ texgen = get_texgen(texUnit, coord);
+ if (!texgen) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGendv(coord)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_TEXTURE_GEN_MODE:
+ params[0] = ENUM_TO_DOUBLE(texgen->Mode);
+ break;
+ case GL_OBJECT_PLANE:
+ COPY_4V(params, texgen->ObjectPlane);
+ break;
+ case GL_EYE_PLANE:
+ COPY_4V(params, texgen->EyePlane);
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGendv(pname)" );
+ }
+}
+
+
+
+void GLAPIENTRY
+_mesa_GetTexGenfv( GLenum coord, GLenum pname, GLfloat *params )
+{
+ struct gl_texture_unit *texUnit;
+ struct gl_texgen *texgen;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGenfv(current unit)");
+ return;
+ }
+
+ texUnit = _mesa_get_current_tex_unit(ctx);
+
+ texgen = get_texgen(texUnit, coord);
+ if (!texgen) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGenfv(coord)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_TEXTURE_GEN_MODE:
+ params[0] = ENUM_TO_FLOAT(texgen->Mode);
+ break;
+ case GL_OBJECT_PLANE:
+ COPY_4V(params, texgen->ObjectPlane);
+ break;
+ case GL_EYE_PLANE:
+ COPY_4V(params, texgen->EyePlane);
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGenfv(pname)" );
+ }
+}
+
+
+
+static void GLAPIENTRY
+_mesa_GetTexGeniv( GLenum coord, GLenum pname, GLint *params )
+{
+ struct gl_texture_unit *texUnit;
+ struct gl_texgen *texgen;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexGeniv(current unit)");
+ return;
+ }
+
+ texUnit = _mesa_get_current_tex_unit(ctx);
+
+ texgen = get_texgen(texUnit, coord);
+ if (!texgen) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexGeniv(coord)");
+ return;
+ }
+
+ switch (pname) {
+ case GL_TEXTURE_GEN_MODE:
+ params[0] = texgen->Mode;
+ break;
+ case GL_OBJECT_PLANE:
+ params[0] = (GLint) texgen->ObjectPlane[0];
+ params[1] = (GLint) texgen->ObjectPlane[1];
+ params[2] = (GLint) texgen->ObjectPlane[2];
+ params[3] = (GLint) texgen->ObjectPlane[3];
+ break;
+ case GL_EYE_PLANE:
+ params[0] = (GLint) texgen->EyePlane[0];
+ params[1] = (GLint) texgen->EyePlane[1];
+ params[2] = (GLint) texgen->EyePlane[2];
+ params[3] = (GLint) texgen->EyePlane[3];
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetTexGeniv(pname)" );
+ }
+}
+
+
+void
+_mesa_init_texgen_dispatch(struct _glapi_table *disp)
+{
+ SET_GetTexGendv(disp, _mesa_GetTexGendv);
+ SET_GetTexGenfv(disp, _mesa_GetTexGenfv);
+ SET_GetTexGeniv(disp, _mesa_GetTexGeniv);
+ SET_TexGend(disp, _mesa_TexGend);
+ SET_TexGendv(disp, _mesa_TexGendv);
+ SET_TexGenf(disp, _mesa_TexGenf);
+ SET_TexGenfv(disp, _mesa_TexGenfv);
+ SET_TexGeni(disp, _mesa_TexGeni);
+ SET_TexGeniv(disp, _mesa_TexGeniv);
+}
+
+
+#endif /* FEATURE_texgen */
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-11 11:40:44 +0000