source: vbox/trunk/src/VBox/GuestHost/OpenGL/state_tracker/state_point.c@ 37775

/* Copyright (c) 2001, Stanford University
 * All rights reserved
 *
 * See the file LICENSE.txt for information on redistributing this software.
 */

#include "state.h"
#include "state/cr_statetypes.h"
#include "state_internals.h"

void crStatePointInit (CRContext *ctx)
{
        CRPointState *p = &ctx->point;
        CRStateBits *sb = GetCurrentBits();
        CRPointBits *pb = &(sb->point);
        int i;

        p->pointSmooth = GL_FALSE;
        RESET(pb->enableSmooth, ctx->bitid);
        p->pointSize = 1.0f;
        RESET(pb->size, ctx->bitid);
#ifdef CR_ARB_point_parameters
        p->minSize = 0.0f;
        RESET(pb->minSize, ctx->bitid);
        p->maxSize = CR_ALIASED_POINT_SIZE_MAX;
        RESET(pb->maxSize, ctx->bitid);
        p->fadeThresholdSize = 1.0f;
        RESET(pb->fadeThresholdSize, ctx->bitid);
        p->distanceAttenuation[0] = 1.0f;
        p->distanceAttenuation[1] = 0.0f;
        p->distanceAttenuation[2] = 0.0f;
        RESET(pb->distanceAttenuation, ctx->bitid);
#endif
#ifdef CR_ARB_point_sprite
        p->pointSprite = GL_FALSE;
        RESET(pb->enableSprite, ctx->bitid);
        for (i = 0; i < CR_MAX_TEXTURE_UNITS; i++) {
                p->coordReplacement[i] = GL_FALSE;
                RESET(pb->coordReplacement[i], ctx->bitid);
        }
#endif

        RESET(pb->dirty, ctx->bitid);

        /*
         *p->aliasedpointsizerange_min = c->aliasedpointsizerange_min; 
         *p->aliasedpointsizerange_max = c->aliasedpointsizerange_max; 
         *p->aliasedpointsizegranularity = c->aliasedpointsizegranularity; 
         *p->smoothpointsizerange_min = c->smoothpointsizerange_min; 
         *p->smoothpointsizerange_max = c->smoothpointsizerange_max; 
         *p->smoothpointgranularity = c->smoothpointgranularity;
         */
}

void STATE_APIENTRY crStatePointSize(GLfloat size) 
{
        CRContext *g = GetCurrentContext();
        CRPointState *p = &(g->point);
        CRStateBits *sb = GetCurrentBits();
        CRPointBits *pb = &(sb->point);

        if (g->current.inBeginEnd)
        {
                crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION, "glPointSize called in begin/end");
                return;
        }

        FLUSH();

        if (size <= 0.0f) 
        {
                crStateError(__LINE__, __FILE__, GL_INVALID_VALUE, "glPointSize called with size <= 0.0: %f", size);
                return;
        }
                
        p->pointSize = size;
        DIRTY(pb->size, g->neg_bitid);
        DIRTY(pb->dirty, g->neg_bitid);
}

void STATE_APIENTRY crStatePointParameterfARB(GLenum pname, GLfloat param)
{
        CRContext *g = GetCurrentContext();

        if (g->current.inBeginEnd)
        {
                crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION, "glPointParameterfARB called in begin/end");
                return;
        }

        FLUSH();

        crStatePointParameterfvARB(pname, &param);
}

void STATE_APIENTRY crStatePointParameterfvARB(GLenum pname, const GLfloat *params)
{
        CRContext *g = GetCurrentContext();
        CRPointState *p = &(g->point);
        CRStateBits *sb = GetCurrentBits();
        CRPointBits *pb = &(sb->point);

        if (g->current.inBeginEnd)
        {
                crStateError(__LINE__, __FILE__, GL_INVALID_OPERATION, "glPointParameterfvARB called in begin/end");
                return;
        }

        FLUSH();

        switch (pname) {
        case GL_DISTANCE_ATTENUATION_EXT:
                if (g->extensions.ARB_point_parameters) {
                        p->distanceAttenuation[0] = params[0];
                        p->distanceAttenuation[1] = params[1];
                        p->distanceAttenuation[2] = params[2];
                        DIRTY(pb->distanceAttenuation, g->neg_bitid);
                }
                else 
                {
                        crStateError(__LINE__, __FILE__, GL_INVALID_ENUM, "glPointParameterfvARB invalid enum: %f", pname);
                        return;
                }
                break;
        case GL_POINT_SIZE_MIN_EXT:
                if (g->extensions.ARB_point_parameters) {
                        if (params[0] < 0.0F) {
                                crStateError(__LINE__, __FILE__, GL_INVALID_VALUE, "glPointParameterfvARB invalid value: %f", params[0]);
                                return;
                        }
                        p->minSize = params[0];
                        DIRTY(pb->minSize, g->neg_bitid);
                }
                else
                {
                        crStateError(__LINE__, __FILE__, GL_INVALID_ENUM, "glPointParameterfvARB invalid enum: %f", pname);
                        return;
                }
                break;
        case GL_POINT_SIZE_MAX_EXT:
                if (g->extensions.ARB_point_parameters) {
                        if (params[0] < 0.0F) {
                                crStateError(__LINE__, __FILE__, GL_INVALID_VALUE, "glPointParameterfvARB invalid value: %f", params[0]);
                                return;
                        }
                        p->maxSize = params[0];
                        DIRTY(pb->maxSize, g->neg_bitid);
                }
                else
                {
                        crStateError(__LINE__, __FILE__, GL_INVALID_ENUM, "glPointParameterfvARB invalid enum: %f", pname);
                        return;
                }
                break;
        case GL_POINT_FADE_THRESHOLD_SIZE_EXT:
                if (g->extensions.ARB_point_parameters) {
                        if (params[0] < 0.0F) {
                                crStateError(__LINE__, __FILE__, GL_INVALID_VALUE, "glPointParameterfvARB invalid value: %f", params[0]);
                                return;
                        }
                        p->fadeThresholdSize = params[0];
                        DIRTY(pb->fadeThresholdSize, g->neg_bitid);
                }
                else
                {
                        crStateError(__LINE__, __FILE__, GL_INVALID_ENUM, "glPointParameterfvARB invalid enum: %f", pname);
                        return;
                }
                break;
        default:
                crStateError(__LINE__, __FILE__, GL_INVALID_ENUM, "glPointParameterfvARB invalid enum: %f", pname);
                return;
        }

        DIRTY(pb->dirty, g->neg_bitid);
}

void STATE_APIENTRY crStatePointParameteri(GLenum pname, GLint param)
{
        GLfloat f_param = (GLfloat) param;
        crStatePointParameterfvARB( pname, &f_param );
}

void STATE_APIENTRY crStatePointParameteriv(GLenum pname, const GLint *params)
{
        GLfloat f_param = (GLfloat) (*params);
        crStatePointParameterfvARB( pname, &f_param );
}