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Some work on nv30 state, heavily based on jkolb's work

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This commit is contained in:
Stephane Marchesin
2006-11-11 00:00:45 +00:00
parent 20802a7b69
commit f82bc9110b
4 changed files with 470 additions and 19 deletions
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src/mesa/drivers/dri/nouveau/Makefile
+2 -1
View File
@@ -19,7 +19,8 @@ DRIVER_SOURCES = \
nouveau_state.c \
nouveau_tex.c \
nouveau_swtcl.c \
nv10_swtcl.c
nv10_swtcl.c \
nv30_state.c
C_SOURCES = \
$(COMMON_SOURCES) \
src/mesa/drivers/dri/nouveau/nouveau_context.h
+6 -4
View File
@@ -83,6 +83,7 @@ typedef struct nouveau_context {
/* The read-only regs */
volatile unsigned char* mmio;
/* FIXME : do we want to put all state into a separate struct ? */
/* State for tris */
GLuint color_offset;
GLuint specular_offset;
@@ -93,10 +94,11 @@ typedef struct nouveau_context {
struct tnl_attr_map vertex_attrs[VERT_ATTRIB_MAX];
GLuint vertex_attr_count;
/* Clear state */
GLuint clear_color;
GLuint clear_depth;
GLuint clear_stencil;
/* Depth/stencil clear state */
uint32_t clear_value;
/* Light state */
uint32_t enabled_lights;
/* The drawing fallbacks */
GLuint Fallback;
src/mesa/drivers/dri/nouveau/nouveau_state.c
-14
View File
@@ -54,20 +54,6 @@ static __inline__ GLuint nouveauPackColor(GLuint format,
}
}
static void nouveauDDClearColor(GLcontext *ctx, const GLfloat color[4])
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
GLubyte c[4];
CLAMPED_FLOAT_TO_UBYTE(c[0], color[0]);
CLAMPED_FLOAT_TO_UBYTE(c[1], color[1]);
CLAMPED_FLOAT_TO_UBYTE(c[2], color[2]);
CLAMPED_FLOAT_TO_UBYTE(c[3], color[3]);
nmesa->clear_color = nouveauPackColor( nmesa->screen->fbFormat,
c[0], c[1], c[2], c[3] );
}
static void nouveauCalcViewport(GLcontext *ctx)
{
/* Calculate the Viewport Matrix */
src/mesa/drivers/dri/nouveau/nv30_state.c
+462
View File
@@ -0,0 +1,462 @@
/**************************************************************************
Copyright 2006 Nouveau
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
on the rights to use, copy, modify, merge, publish, distribute, sub
license, 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 (including the next
paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
ERIC ANHOLT OR SILICON INTEGRATED SYSTEMS CORP 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.
**************************************************************************/
#include "nouveau_context.h"
#include "nouveau_object.h"
#include "nouveau_fifo.h"
#include "nouveau_reg.h"
#include "tnl/t_pipeline.h"
#include "mtypes.h"
#include "colormac.h"
void nv30AlphaFunc(GLcontext *ctx, GLenum func, GLfloat ref)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
GLubyte ubRef;
CLAMPED_FLOAT_TO_UBYTE(ubRef, ref);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_ALPHA_FUNC_FUNC, 2);
OUT_RING(func); /* NV30_TCL_PRIMITIVE_3D_ALPHA_FUNC_FUNC */
OUT_RING(ubRef); /* NV30_TCL_PRIMITIVE_3D_ALPHA_FUNC_REF */
}
void nv30BlendColor(GLcontext *ctx, const GLfloat color[4])
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
GLubyte cf[4];
CLAMPED_FLOAT_TO_UBYTE(cf[0], color[0]);
CLAMPED_FLOAT_TO_UBYTE(cf[1], color[1]);
CLAMPED_FLOAT_TO_UBYTE(cf[2], color[2]);
CLAMPED_FLOAT_TO_UBYTE(cf[3], color[3]);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_BLEND_COLOR, 1);
OUT_RING(PACK_COLOR_8888(cf[3], cf[1], cf[2], cf[0]));
}
void nv30BlendEquationSeparate(GLcontext *ctx, GLenum modeRGB, GLenum modeA)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_BLEND_EQUATION, 1);
OUT_RING((modeA<<16) | modeRGB);
}
void nv30BlendFuncSeparate(GLcontext *ctx, GLenum sfactorRGB, GLenum dfactorRGB,
GLenum sfactorA, GLenum dfactorA)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_BLEND_FUNC_SRC, 2);
OUT_RING((sfactorA<<16) | sfactorRGB);
OUT_RING((dfactorA<<16) | dfactorRGB);
}
void nv30ClearColor(GLcontext *ctx, const GLfloat color[4])
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
GLubyte c[4];
UNCLAMPED_FLOAT_TO_RGBA_CHAN(c,color);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_CLEAR_VALUE_ARGB, 1);
OUT_RING(PACK_COLOR_8888(c[3],c[0],c[1],c[2]));
}
void nv30ClearDepth(GLcontext *ctx, GLclampd d)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
nmesa->clear_value=((nmesa->clear_value&0x000000FF)|(((uint32_t)(d*0xFFFFFF))<<8));
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_CLEAR_VALUE_DEPTH, 1);
OUT_RING(nmesa->clear_value);
}
/* we're don't support indexed buffers
void (*ClearIndex)(GLcontext *ctx, GLuint index)
*/
void nv30ClearStencil(GLcontext *ctx, GLint s)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
nmesa->clear_value=((nmesa->clear_value&0xFFFFFF00)|(s&0x000000FF));
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_CLEAR_VALUE_DEPTH, 1);
OUT_RING(nmesa->clear_value);
}
void nv30ClipPlane(GLcontext *ctx, GLenum plane, const GLfloat *equation)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_CLIP_PLANE_A(plane), 4);
OUT_RINGf(equation[0]);
OUT_RINGf(equation[1]);
OUT_RINGf(equation[2]);
OUT_RINGf(equation[3]);
}
void nv30ColorMask(GLcontext *ctx, GLboolean rmask, GLboolean gmask,
GLboolean bmask, GLboolean amask )
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_COLOR_MASK, 1);
OUT_RING(((amask && 0x01) << 24) | ((rmask && 0x01) << 16) | ((gmask && 0x01)<< 8) | ((bmask && 0x01) << 0));
}
void nv30ColorMaterial(GLcontext *ctx, GLenum face, GLenum mode)
{
// TODO I need love
}
void nv30CullFace(GLcontext *ctx, GLenum mode)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_CULL_FACE, 1);
OUT_RING(mode);
}
void nv30FrontFace(GLcontext *ctx, GLenum mode)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_FRONT_FACE, 1);
OUT_RING(mode);
}
void nv30DepthFunc(GLcontext *ctx, GLenum func)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_DEPTH_FUNC, 1);
OUT_RING(func);
}
void nv30DepthMask(GLcontext *ctx, GLboolean flag)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_DEPTH_WRITE_ENABLE, 1);
OUT_RING(flag);
}
void nv30DepthRange(GLcontext *ctx, GLclampd nearval, GLclampd farval)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_DEPTH_RANGE_NEAR, 2);
OUT_RINGf(nearval);
OUT_RINGf(farval);
}
/** Specify the current buffer for writing */
//void (*DrawBuffer)( GLcontext *ctx, GLenum buffer );
/** Specify the buffers for writing for fragment programs*/
//void (*DrawBuffers)( GLcontext *ctx, GLsizei n, const GLenum *buffers );
void nv30Enable(GLcontext *ctx, GLenum cap, GLboolean state)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
switch(cap)
{
case GL_ALPHA_TEST:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_ALPHA_FUNC_ENABLE, 1);
OUT_RING(state);
break;
// case GL_AUTO_NORMAL:
case GL_BLEND:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_BLEND_FUNC_ENABLE, 1);
OUT_RING(state);
break;
case GL_CLIP_PLANE0:
case GL_CLIP_PLANE1:
case GL_CLIP_PLANE2:
case GL_CLIP_PLANE3:
case GL_CLIP_PLANE4:
case GL_CLIP_PLANE5:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_CLIP_PLANE_ENABLE(cap-GL_CLIP_PLANE0), 1);
OUT_RING(state);
break;
case GL_COLOR_LOGIC_OP:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LOGIC_OP_ENABLE, 1);
OUT_RING(state);
break;
// case GL_COLOR_MATERIAL:
// case GL_COLOR_SUM_EXT:
// case GL_COLOR_TABLE:
// case GL_CONVOLUTION_1D:
// case GL_CONVOLUTION_2D:
case GL_CULL_FACE:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_CULL_FACE_ENABLE, 1);
OUT_RING(state);
break;
case GL_DEPTH_TEST:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_DEPTH_TEST_ENABLE, 1);
OUT_RING(state);
break;
case GL_DITHER:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_DITHER_ENABLE, 1);
OUT_RING(state);
break;
case GL_FOG:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_FOG_ENABLE, 1);
OUT_RING(state);
break;
// case GL_HISTOGRAM:
// case GL_INDEX_LOGIC_OP:
case GL_LIGHT0:
case GL_LIGHT1:
case GL_LIGHT2:
case GL_LIGHT3:
case GL_LIGHT4:
case GL_LIGHT5:
case GL_LIGHT6:
case GL_LIGHT7:
{
uint32_t mask=0x11<<(2*(cap-GL_LIGHT0));
nmesa->enabled_lights=((nmesa->enabled_lights&mask)|(mask*state));
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_ENABLED_LIGHTS, 1);
OUT_RING(nmesa->enabled_lights);
break;
}
// case GL_LIGHTING:
// case GL_LINE_SMOOTH:
// case GL_LINE_STIPPLE:
// case GL_MAP1_COLOR_4:
// case GL_MAP1_INDEX:
// case GL_MAP1_NORMAL:
// case GL_MAP1_TEXTURE_COORD_1:
// case GL_MAP1_TEXTURE_COORD_2:
// case GL_MAP1_TEXTURE_COORD_3:
// case GL_MAP1_TEXTURE_COORD_4:
// case GL_MAP1_VERTEX_3:
// case GL_MAP1_VERTEX_4:
// case GL_MAP2_COLOR_4:
// case GL_MAP2_INDEX:
// case GL_MAP2_NORMAL:
// case GL_MAP2_TEXTURE_COORD_1:
// case GL_MAP2_TEXTURE_COORD_2:
// case GL_MAP2_TEXTURE_COORD_3:
// case GL_MAP2_TEXTURE_COORD_4:
// case GL_MAP2_VERTEX_3:
// case GL_MAP2_VERTEX_4:
// case GL_MINMAX:
case GL_NORMALIZE:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_NORMALIZE_ENABLE, 1);
OUT_RING(state);
break;
// case GL_POINT_SMOOTH:
case GL_POLYGON_OFFSET_POINT:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_POLYGON_OFFSET_POINT_ENABLE, 1);
OUT_RING(state);
break;
case GL_POLYGON_OFFSET_LINE:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_POLYGON_OFFSET_LINE_ENABLE, 1);
OUT_RING(state);
break;
case GL_POLYGON_OFFSET_FILL:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_POLYGON_OFFSET_FILL_ENABLE, 1);
OUT_RING(state);
break;
case GL_POLYGON_SMOOTH:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_POLYGON_SMOOTH_ENABLE, 1);
OUT_RING(state);
break;
case GL_POLYGON_STIPPLE:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_POLYGON_STIPPLE_ENABLE, 1);
OUT_RING(state);
break;
// case GL_POST_COLOR_MATRIX_COLOR_TABLE:
// case GL_POST_CONVOLUTION_COLOR_TABLE:
// case GL_RESCALE_NORMAL:
// case GL_SCISSOR_TEST:
// case GL_SEPARABLE_2D:
case GL_STENCIL_TEST:
// TODO BACK and FRONT ?
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_STENCIL_BACK_ENABLE, 1);
OUT_RING(state);
break;
// case GL_TEXTURE_GEN_Q:
// case GL_TEXTURE_GEN_R:
// case GL_TEXTURE_GEN_S:
// case GL_TEXTURE_GEN_T:
// case GL_TEXTURE_1D:
// case GL_TEXTURE_2D:
// case GL_TEXTURE_3D:
}
}
void nv30Fogfv(GLcontext *ctx, GLenum pname, const GLfloat *params)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
switch(pname)
{
case GL_FOG_MODE:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_FOG_MODE, 1);
//OUT_RING (params);
break;
/* TODO: unsure about the rest.*/
default:
break;
}
}
void nv30Hint(GLcontext *ctx, GLenum target, GLenum mode)
{
// TODO I need love (fog and line_smooth hints)
}
// void (*IndexMask)(GLcontext *ctx, GLuint mask);
void nv30Lightfv(GLcontext *ctx, GLenum light, GLenum pname, const GLfloat *params )
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
/* not sure where the fourth param value goes...*/
switch(pname)
{
case GL_AMBIENT:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_FRONT_SIDE_PRODUCT_AMBIENT_A(light), 3);
OUT_RINGf(params[0]);
OUT_RINGf(params[1]);
OUT_RINGf(params[2]);
break;
case GL_DIFFUSE:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_FRONT_SIDE_PRODUCT_DIFFUSE_A(light), 3);
OUT_RINGf(params[0]);
OUT_RINGf(params[1]);
OUT_RINGf(params[2]);
break;
case GL_SPECULAR:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_FRONT_SIDE_PRODUCT_SPECULAR_A(light), 3);
OUT_RINGf(params[0]);
OUT_RINGf(params[1]);
OUT_RINGf(params[2]);
break;
case GL_SPOT_DIRECTION:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_SPOT_DIR_X(light), 3);
OUT_RINGf(params[0]);
OUT_RINGf(params[1]);
OUT_RINGf(params[2]);
break;
case GL_POSITION:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_POSITION_X(light), 3);
OUT_RINGf(params[0]);
OUT_RINGf(params[1]);
OUT_RINGf(params[2]);
break;
case GL_SPOT_EXPONENT:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_SPOT_EXPONENT(light), 1);
OUT_RINGf(*params);
break;
case GL_SPOT_CUTOFF:
/* you can't factor these */
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_SPOT_CUTOFF_A(light), 1);
OUT_RINGf(params[0]);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_SPOT_CUTOFF_B(light), 1);
OUT_RINGf(params[1]);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_SPOT_CUTOFF_C(light), 1);
OUT_RINGf(params[2]);
break;
case GL_CONSTANT_ATTENUATION:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_CONSTANT_ATTENUATION(light), 1);
OUT_RINGf(*params);
break;
case GL_LINEAR_ATTENUATION:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_LINEAR_ATTENUATION(light), 1);
OUT_RINGf(*params);
break;
case GL_QUADRATIC_ATTENUATION:
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LIGHT_QUADRATIC_ATTENUATION(light), 1);
OUT_RINGf(*params);
break;
default:
break;
}
}
/** Set the lighting model parameters */
void (*LightModelfv)(GLcontext *ctx, GLenum pname, const GLfloat *params);
void nv30LineStipple(GLcontext *ctx, GLint factor, GLushort pattern )
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LINE_STIPPLE_PATTERN, 1);
OUT_RING((pattern << 16) | factor);
}
void nv30LineWidth(GLcontext *ctx, GLfloat width)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LINE_WIDTH_SMOOTH, 1);
OUT_RINGf(width);
}
void nv30LogicOpcode(GLcontext *ctx, GLenum opcode)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
BEGIN_RING_SIZE(NvSub3D, NV30_TCL_PRIMITIVE_3D_LOGIC_OP_OP, 1);
OUT_RING(opcode);
}
void nv30PointParameterfv(GLcontext *ctx, GLenum pname, const GLfloat *params)
{
/*TODO: not sure what goes here. */
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
}
/** Specify the diameter of rasterized points */
void (*PointSize)(GLcontext *ctx, GLfloat size);
/** Select a polygon rasterization mode */
void (*PolygonMode)(GLcontext *ctx, GLenum face, GLenum mode);
/** Set the scale and units used to calculate depth values */
void (*PolygonOffset)(GLcontext *ctx, GLfloat factor, GLfloat units);
/** Set the polygon stippling pattern */
void (*PolygonStipple)(GLcontext *ctx, const GLubyte *mask );
/* Specifies the current buffer for reading */
void (*ReadBuffer)( GLcontext *ctx, GLenum buffer );
/** Set rasterization mode */
void (*RenderMode)(GLcontext *ctx, GLenum mode );
/** Define the scissor box */
void (*Scissor)(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h);
/** Select flat or smooth shading */
void (*ShadeModel)(GLcontext *ctx, GLenum mode);
/** OpenGL 2.0 two-sided StencilFunc */
void (*StencilFuncSeparate)(GLcontext *ctx, GLenum face, GLenum func,
GLint ref, GLuint mask);
/** OpenGL 2.0 two-sided StencilMask */
void (*StencilMaskSeparate)(GLcontext *ctx, GLenum face, GLuint mask);
/** OpenGL 2.0 two-sided StencilOp */
void (*StencilOpSeparate)(GLcontext *ctx, GLenum face, GLenum fail,
GLenum zfail, GLenum zpass);
/** Control the generation of texture coordinates */
void (*TexGen)(GLcontext *ctx, GLenum coord, GLenum pname,
const GLfloat *params);
/** Set texture environment parameters */
void (*TexEnv)(GLcontext *ctx, GLenum target, GLenum pname,
const GLfloat *param);
/** Set texture parameters */
void (*TexParameter)(GLcontext *ctx, GLenum target,
struct gl_texture_object *texObj,
GLenum pname, const GLfloat *params);
void (*TextureMatrix)(GLcontext *ctx, GLuint unit, const GLmatrix *mat);
/** Set the viewport */
void (*Viewport)(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h);