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replicant-frameworks_native/opengl/libagl/light.cpp
Mathias Agopian 69ca17a124 fix [1610840] Positional light doesn't work correctly on emulator 
This bug was introduced when lighting computations was changed from eye-space to object-space.
The light position need to be transformed back to object-space each time the modelview matrix changes which requires us to compute the inverse of the modelview matrix. This computation was done with the assumption that normals where transformed (which was the case when the computation was made in eye-space), however, normals only require the inverse of the upper 3x3 matrix while transforming positions requires the inverse of the whole matrix.
This caused the interesting behavior that lights were more-or-less transformed properly, but not translated at all, which caused improper lighting with directional lights in particular.

There was also another smaller bug affecting directional lights: when vertices are read, only the active component are read, the other ones are ignored, later, the transformation operations are set up to ignore the unset values, howver, in the case of lighting, we use the vertex in object space (that is, before it is transformed), and therefore were using uninitalized values; in particular w.
2009-06-03 15:09:52 -07:00

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/* libs/opengles/light.cpp
**
** Copyright 2006, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include <stdio.h>
#include "context.h"
#include "fp.h"
#include "light.h"
#include "state.h"
#include "matrix.h"
#if defined(__arm__) && defined(__thumb__)
#warning "light.cpp should not be compiled in thumb on ARM."
#endif
namespace android {
// ----------------------------------------------------------------------------
static void invalidate_lighting(ogles_context_t* c);
static void lightVertexValidate(ogles_context_t* c, vertex_t* v);
static void lightVertexNop(ogles_context_t* c, vertex_t* v);
static void lightVertex(ogles_context_t* c, vertex_t* v);
static void lightVertexMaterial(ogles_context_t* c, vertex_t* v);
static inline void vscale3(GLfixed* d, const GLfixed* m, GLfixed s);
static __attribute__((noinline))
void vnorm3(GLfixed* d, const GLfixed* a);
static inline void vsa3(GLfixed* d,
const GLfixed* m, GLfixed s, const GLfixed* a);
static inline void vss3(GLfixed* d,
const GLfixed* m, GLfixed s, const GLfixed* a);
static inline void vmla3(GLfixed* d,
const GLfixed* m0, const GLfixed* m1, const GLfixed* a);
static inline void vmul3(GLfixed* d,
const GLfixed* m0, const GLfixed* m1);
static GLfixed fog_linear(ogles_context_t* c, GLfixed z);
static GLfixed fog_exp(ogles_context_t* c, GLfixed z);
static GLfixed fog_exp2(ogles_context_t* c, GLfixed z);
// ----------------------------------------------------------------------------
static void init_white(vec4_t& c) {
c.r = c.g = c.b = c.a = 0x10000;
}
void ogles_init_light(ogles_context_t* c)
{
for (unsigned int i=0 ; i<OGLES_MAX_LIGHTS ; i++) {
c->lighting.lights[i].ambient.a = 0x10000;
c->lighting.lights[i].position.z = 0x10000;
c->lighting.lights[i].spotDir.z = -0x10000;
c->lighting.lights[i].spotCutoff = gglIntToFixed(180);
c->lighting.lights[i].attenuation[0] = 0x10000;
}
init_white(c->lighting.lights[0].diffuse);
init_white(c->lighting.lights[0].specular);
c->lighting.front.ambient.r =
c->lighting.front.ambient.g =
c->lighting.front.ambient.b = gglFloatToFixed(0.2f);
c->lighting.front.ambient.a = 0x10000;
c->lighting.front.diffuse.r =
c->lighting.front.diffuse.g =
c->lighting.front.diffuse.b = gglFloatToFixed(0.8f);
c->lighting.front.diffuse.a = 0x10000;
c->lighting.front.specular.a = 0x10000;
c->lighting.front.emission.a = 0x10000;
c->lighting.lightModel.ambient.r =
c->lighting.lightModel.ambient.g =
c->lighting.lightModel.ambient.b = gglFloatToFixed(0.2f);
c->lighting.lightModel.ambient.a = 0x10000;
c->lighting.colorMaterial.face = GL_FRONT_AND_BACK;
c->lighting.colorMaterial.mode = GL_AMBIENT_AND_DIFFUSE;
c->fog.mode = GL_EXP;
c->fog.fog = fog_exp;
c->fog.density = 0x10000;
c->fog.end = 0x10000;
c->fog.invEndMinusStart = 0x10000;
invalidate_lighting(c);
c->rasterizer.procs.shadeModel(c, GL_SMOOTH);
c->lighting.shadeModel = GL_SMOOTH;
}
void ogles_uninit_light(ogles_context_t* c)
{
}
static inline int32_t clampF(GLfixed f) CONST;
int32_t clampF(GLfixed f) {
f = (f & ~(f>>31));
if (f >= 0x10000)
f = 0x10000;
return f;
}
static GLfixed fog_linear(ogles_context_t* c, GLfixed z) {
return clampF(gglMulx((c->fog.end - ((z<0)?-z:z)), c->fog.invEndMinusStart));
}
static GLfixed fog_exp(ogles_context_t* c, GLfixed z) {
const float e = fixedToFloat(gglMulx(c->fog.density, ((z<0)?-z:z)));
return clampF(gglFloatToFixed(fastexpf(-e)));
}
static GLfixed fog_exp2(ogles_context_t* c, GLfixed z) {
const float e = fixedToFloat(gglMulx(c->fog.density, z));
return clampF(gglFloatToFixed(fastexpf(-e*e)));
}
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#pragma mark math helpers
#endif
static inline
void vscale3(GLfixed* d, const GLfixed* m, GLfixed s) {
d[0] = gglMulx(m[0], s);
d[1] = gglMulx(m[1], s);
d[2] = gglMulx(m[2], s);
}
static inline
void vsa3(GLfixed* d, const GLfixed* m, GLfixed s, const GLfixed* a) {
d[0] = gglMulAddx(m[0], s, a[0]);
d[1] = gglMulAddx(m[1], s, a[1]);
d[2] = gglMulAddx(m[2], s, a[2]);
}
static inline
void vss3(GLfixed* d, const GLfixed* m, GLfixed s, const GLfixed* a) {
d[0] = gglMulSubx(m[0], s, a[0]);
d[1] = gglMulSubx(m[1], s, a[1]);
d[2] = gglMulSubx(m[2], s, a[2]);
}
static inline
void vmla3(GLfixed* d,
const GLfixed* m0, const GLfixed* m1, const GLfixed* a)
{
d[0] = gglMulAddx(m0[0], m1[0], a[0]);
d[1] = gglMulAddx(m0[1], m1[1], a[1]);
d[2] = gglMulAddx(m0[2], m1[2], a[2]);
}
static inline
void vmul3(GLfixed* d, const GLfixed* m0, const GLfixed* m1) {
d[0] = gglMulx(m0[0], m1[0]);
d[1] = gglMulx(m0[1], m1[1]);
d[2] = gglMulx(m0[2], m1[2]);
}
void vnorm3(GLfixed* d, const GLfixed* a)
{
// we must take care of overflows when normalizing a vector
GLfixed n;
int32_t x = a[0]; x = x>=0 ? x : -x;
int32_t y = a[1]; y = y>=0 ? y : -y;
int32_t z = a[2]; z = z>=0 ? z : -z;
if (ggl_likely(x<=0x6800 && y<=0x6800 && z<= 0x6800)) {
// in this case this will all fit on 32 bits
n = x*x + y*y + z*z;
n = gglSqrtRecipx(n);
n <<= 8;
} else {
// here norm^2 is at least 0x7EC00000 (>>32 == 0.495117)
n = vsquare3(x, y, z);
n = gglSqrtRecipx(n);
}
vscale3(d, a, n);
}
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#pragma mark lighting equations
#endif
static inline void light_picker(ogles_context_t* c)
{
if (ggl_likely(!c->lighting.enable)) {
c->lighting.lightVertex = lightVertexNop;
return;
}
if (c->lighting.colorMaterial.enable) {
c->lighting.lightVertex = lightVertexMaterial;
} else {
c->lighting.lightVertex = lightVertex;
}
}
static inline void validate_light_mvi(ogles_context_t* c)
{
uint32_t en = c->lighting.enabledLights;
while (en) {
const int i = 31 - gglClz(en);
en &= ~(1<<i);
light_t& l = c->lighting.lights[i];
c->transforms.mvui.point4(&c->transforms.mvui,
&l.objPosition, &l.position);
vnorm3(l.normalizedObjPosition.v, l.objPosition.v);
}
}
static inline void validate_light(ogles_context_t* c)
{
// if colorMaterial is enabled, we get the color from the vertex
if (!c->lighting.colorMaterial.enable) {
material_t& material = c->lighting.front;
uint32_t en = c->lighting.enabledLights;
while (en) {
const int i = 31 - gglClz(en);
en &= ~(1<<i);
light_t& l = c->lighting.lights[i];
vmul3(l.implicitAmbient.v, material.ambient.v, l.ambient.v);
vmul3(l.implicitDiffuse.v, material.diffuse.v, l.diffuse.v);
vmul3(l.implicitSpecular.v, material.specular.v, l.specular.v);
// this is just a flag to tell if we have a specular component
l.implicitSpecular.v[3] =
l.implicitSpecular.r |
l.implicitSpecular.g |
l.implicitSpecular.b;
l.rConstAttenuation = (l.attenuation[1] | l.attenuation[2])==0;
if (l.rConstAttenuation)
l.rConstAttenuation = gglRecipFast(l.attenuation[0]);
}
// emission and ambient for the whole scene
vmla3( c->lighting.implicitSceneEmissionAndAmbient.v,
c->lighting.lightModel.ambient.v,
material.ambient.v,
material.emission.v);
c->lighting.implicitSceneEmissionAndAmbient.a = material.diffuse.a;
}
validate_light_mvi(c);
}
void invalidate_lighting(ogles_context_t* c)
{
// TODO: pick lightVertexValidate or lightVertexValidateMVI
// instead of systematically the heavier lightVertexValidate()
c->lighting.lightVertex = lightVertexValidate;
}
void ogles_invalidate_lighting_mvui(ogles_context_t* c)
{
invalidate_lighting(c);
}
void lightVertexNop(ogles_context_t*, vertex_t* v)
{
// we should never end-up here
}
void lightVertexValidateMVI(ogles_context_t* c, vertex_t* v)
{
validate_light_mvi(c);
light_picker(c);
c->lighting.lightVertex(c, v);
}
void lightVertexValidate(ogles_context_t* c, vertex_t* v)
{
validate_light(c);
light_picker(c);
c->lighting.lightVertex(c, v);
}
void lightVertexMaterial(ogles_context_t* c, vertex_t* v)
{
// fetch the material color
const GLvoid* cp = c->arrays.color.element(
v->index & vertex_cache_t::INDEX_MASK);
c->arrays.color.fetch(c, v->color.v, cp);
// acquire the color-material from the vertex
material_t& material = c->lighting.front;
material.ambient =
material.diffuse = v->color;
// implicit arguments need to be computed per/vertex
uint32_t en = c->lighting.enabledLights;
while (en) {
const int i = 31 - gglClz(en);
en &= ~(1<<i);
light_t& l = c->lighting.lights[i];
vmul3(l.implicitAmbient.v, material.ambient.v, l.ambient.v);
vmul3(l.implicitDiffuse.v, material.diffuse.v, l.diffuse.v);
vmul3(l.implicitSpecular.v, material.specular.v, l.specular.v);
// this is just a flag to tell if we have a specular component
l.implicitSpecular.v[3] =
l.implicitSpecular.r |
l.implicitSpecular.g |
l.implicitSpecular.b;
}
// emission and ambient for the whole scene
vmla3( c->lighting.implicitSceneEmissionAndAmbient.v,
c->lighting.lightModel.ambient.v,
material.ambient.v,
material.emission.v);
c->lighting.implicitSceneEmissionAndAmbient.a = material.diffuse.a;
// now we can light our vertex as usual
lightVertex(c, v);
}
void lightVertex(ogles_context_t* c, vertex_t* v)
{
// emission and ambient for the whole scene
vec4_t r = c->lighting.implicitSceneEmissionAndAmbient;
uint32_t en = c->lighting.enabledLights;
if (ggl_likely(en)) {
// since we do the lighting in object-space, we don't need to
// transform each normal. However, we might still have to normalize
// it if GL_NORMALIZE is enabled.
vec4_t n;
c->arrays.normal.fetch(c, n.v,
c->arrays.normal.element(v->index & vertex_cache_t::INDEX_MASK));
// TODO: right now we handle GL_RESCALE_NORMALS as if ti were
// GL_NORMALIZE. We could optimize this by scaling mvui
// appropriately instead.
if (c->transforms.rescaleNormals)
vnorm3(n.v, n.v);
const material_t& material = c->lighting.front;
const int twoSide = c->lighting.lightModel.twoSide;
while (en) {
const int i = 31 - gglClz(en);
en &= ~(1<<i);
const light_t& l = c->lighting.lights[i];
vec4_t d, t;
GLfixed s;
GLfixed sqDist = 0x10000;
// compute vertex-to-light vector
if (ggl_unlikely(l.position.w)) {
// lightPos/1.0 - vertex/vertex.w == lightPos*vertex.w - vertex
vss3(d.v, l.objPosition.v, v->obj.w, v->obj.v);
sqDist = dot3(d.v, d.v);
vscale3(d.v, d.v, gglSqrtRecipx(sqDist));
} else {
// TODO: avoid copy here
d = l.normalizedObjPosition;
}
// ambient & diffuse
s = dot3(n.v, d.v);
s = (s<0) ? (twoSide?(-s):0) : s;
vsa3(t.v, l.implicitDiffuse.v, s, l.implicitAmbient.v);
// specular
if (ggl_unlikely(s && l.implicitSpecular.v[3])) {
vec4_t h;
h.x = d.x;
h.y = d.y;
h.z = d.z + 0x10000;
vnorm3(h.v, h.v);
s = dot3(n.v, h.v);
s = (s<0) ? (twoSide?(-s):0) : s;
if (s > 0) {
s = gglPowx(s, material.shininess);
vsa3(t.v, l.implicitSpecular.v, s, t.v);
}
}
// spot
if (ggl_unlikely(l.spotCutoff != gglIntToFixed(180))) {
GLfixed spotAtt = -dot3(l.normalizedSpotDir.v, d.v);
if (spotAtt >= l.spotCutoffCosine) {
vscale3(t.v, t.v, gglPowx(spotAtt, l.spotExp));
}
}
// attenuation
if (ggl_unlikely(l.position.w)) {
if (l.rConstAttenuation) {
s = l.rConstAttenuation;
} else {
s = gglMulAddx(sqDist, l.attenuation[2], l.attenuation[0]);
if (l.attenuation[1])
s = gglMulAddx(gglSqrtx(sqDist), l.attenuation[1], s);
s = gglRecipFast(s);
}
vscale3(t.v, t.v, s);
}
r.r += t.r;
r.g += t.g;
r.b += t.b;
}
}
v->color.r = gglClampx(r.r);
v->color.g = gglClampx(r.g);
v->color.b = gglClampx(r.b);
v->color.a = gglClampx(r.a);
v->flags |= vertex_t::LIT;
}
static void lightModelx(GLenum pname, GLfixed param, ogles_context_t* c)
{
if (ggl_unlikely(pname != GL_LIGHT_MODEL_TWO_SIDE)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->lighting.lightModel.twoSide = param ? GL_TRUE : GL_FALSE;
invalidate_lighting(c);
}
static void lightx(GLenum i, GLenum pname, GLfixed param, ogles_context_t* c)
{
if (ggl_unlikely(uint32_t(i-GL_LIGHT0) >= OGLES_MAX_LIGHTS)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
light_t& light = c->lighting.lights[i-GL_LIGHT0];
const GLfixed kDegToRad = GLfixed((M_PI * gglIntToFixed(1)) / 180.0f);
switch (pname) {
case GL_SPOT_EXPONENT:
if (GGLfixed(param) >= gglIntToFixed(128)) {
ogles_error(c, GL_INVALID_VALUE);
return;
}
light.spotExp = param;
break;
case GL_SPOT_CUTOFF:
if (param!=gglIntToFixed(180) && GGLfixed(param)>=gglIntToFixed(90)) {
ogles_error(c, GL_INVALID_VALUE);
return;
}
light.spotCutoff = param;
light.spotCutoffCosine =
gglFloatToFixed(cosinef((M_PI/(180.0f*65536.0f))*param));
break;
case GL_CONSTANT_ATTENUATION:
if (param < 0) {
ogles_error(c, GL_INVALID_VALUE);
return;
}
light.attenuation[0] = param;
break;
case GL_LINEAR_ATTENUATION:
if (param < 0) {
ogles_error(c, GL_INVALID_VALUE);
return;
}
light.attenuation[1] = param;
break;
case GL_QUADRATIC_ATTENUATION:
if (param < 0) {
ogles_error(c, GL_INVALID_VALUE);
return;
}
light.attenuation[2] = param;
break;
default:
ogles_error(c, GL_INVALID_ENUM);
return;
}
invalidate_lighting(c);
}
static void lightxv(GLenum i, GLenum pname, const GLfixed *params, ogles_context_t* c)
{
if (ggl_unlikely(uint32_t(i-GL_LIGHT0) >= OGLES_MAX_LIGHTS)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
GLfixed* what;
light_t& light = c->lighting.lights[i-GL_LIGHT0];
switch (pname) {
case GL_AMBIENT:
what = light.ambient.v;
break;
case GL_DIFFUSE:
what = light.diffuse.v;
break;
case GL_SPECULAR:
what = light.specular.v;
break;
case GL_POSITION: {
ogles_validate_transform(c, transform_state_t::MODELVIEW);
transform_t& mv = c->transforms.modelview.transform;
memcpy(light.position.v, params, sizeof(light.position.v));
mv.point4(&mv, &light.position, &light.position);
invalidate_lighting(c);
return;
}
case GL_SPOT_DIRECTION: {
ogles_validate_transform(c, transform_state_t::MVUI);
transform_t& mvui = c->transforms.mvui;
mvui.point3(&mvui, &light.spotDir, (vec4_t*)params);
vnorm3(light.normalizedSpotDir.v, light.spotDir.v);
invalidate_lighting(c);
return;
}
default:
lightx(i, pname, params[0], c);
return;
}
what[0] = params[0];
what[1] = params[1];
what[2] = params[2];
what[3] = params[3];
invalidate_lighting(c);
}
static void materialx(GLenum face, GLenum pname, GLfixed param, ogles_context_t* c)
{
if (ggl_unlikely(face != GL_FRONT_AND_BACK)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
if (ggl_unlikely(pname != GL_SHININESS)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->lighting.front.shininess = param;
invalidate_lighting(c);
}
static void fogx(GLenum pname, GLfixed param, ogles_context_t* c)
{
switch (pname) {
case GL_FOG_DENSITY:
if (param >= 0) {
c->fog.density = param;
break;
}
ogles_error(c, GL_INVALID_VALUE);
break;
case GL_FOG_START:
c->fog.start = param;
c->fog.invEndMinusStart = gglRecip(c->fog.end - c->fog.start);
break;
case GL_FOG_END:
c->fog.end = param;
c->fog.invEndMinusStart = gglRecip(c->fog.end - c->fog.start);
break;
case GL_FOG_MODE:
switch (param) {
case GL_LINEAR:
c->fog.mode = param;
c->fog.fog = fog_linear;
break;
case GL_EXP:
c->fog.mode = param;
c->fog.fog = fog_exp;
break;
case GL_EXP2:
c->fog.mode = param;
c->fog.fog = fog_exp2;
break;
default:
ogles_error(c, GL_INVALID_ENUM);
break;
}
break;
default:
ogles_error(c, GL_INVALID_ENUM);
break;
}
}
// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------
using namespace android;
#if 0
#pragma mark -
#pragma mark lighting APIs
#endif
void glShadeModel(GLenum mode)
{
ogles_context_t* c = ogles_context_t::get();
if (ggl_unlikely(mode != GL_SMOOTH && mode != GL_FLAT)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->lighting.shadeModel = mode;
}
void glLightModelf(GLenum pname, GLfloat param)
{
ogles_context_t* c = ogles_context_t::get();
lightModelx(pname, gglFloatToFixed(param), c);
}
void glLightModelx(GLenum pname, GLfixed param)
{
ogles_context_t* c = ogles_context_t::get();
lightModelx(pname, param, c);
}
void glLightModelfv(GLenum pname, const GLfloat *params)
{
ogles_context_t* c = ogles_context_t::get();
if (pname == GL_LIGHT_MODEL_TWO_SIDE) {
lightModelx(pname, gglFloatToFixed(params[0]), c);
return;
}
if (ggl_unlikely(pname != GL_LIGHT_MODEL_AMBIENT)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->lighting.lightModel.ambient.r = gglFloatToFixed(params[0]);
c->lighting.lightModel.ambient.g = gglFloatToFixed(params[1]);
c->lighting.lightModel.ambient.b = gglFloatToFixed(params[2]);
c->lighting.lightModel.ambient.a = gglFloatToFixed(params[3]);
invalidate_lighting(c);
}
void glLightModelxv(GLenum pname, const GLfixed *params)
{
ogles_context_t* c = ogles_context_t::get();
if (pname == GL_LIGHT_MODEL_TWO_SIDE) {
lightModelx(pname, params[0], c);
return;
}
if (ggl_unlikely(pname != GL_LIGHT_MODEL_AMBIENT)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
c->lighting.lightModel.ambient.r = params[0];
c->lighting.lightModel.ambient.g = params[1];
c->lighting.lightModel.ambient.b = params[2];
c->lighting.lightModel.ambient.a = params[3];
invalidate_lighting(c);
}
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#endif
void glLightf(GLenum i, GLenum pname, GLfloat param)
{
ogles_context_t* c = ogles_context_t::get();
lightx(i, pname, gglFloatToFixed(param), c);
}
void glLightx(GLenum i, GLenum pname, GLfixed param)
{
ogles_context_t* c = ogles_context_t::get();
lightx(i, pname, param, c);
}
void glLightfv(GLenum i, GLenum pname, const GLfloat *params)
{
ogles_context_t* c = ogles_context_t::get();
switch (pname) {
case GL_SPOT_EXPONENT:
case GL_SPOT_CUTOFF:
case GL_CONSTANT_ATTENUATION:
case GL_LINEAR_ATTENUATION:
case GL_QUADRATIC_ATTENUATION:
lightx(i, pname, gglFloatToFixed(params[0]), c);
return;
}
GLfixed paramsx[4];
paramsx[0] = gglFloatToFixed(params[0]);
paramsx[1] = gglFloatToFixed(params[1]);
paramsx[2] = gglFloatToFixed(params[2]);
if (pname != GL_SPOT_DIRECTION)
paramsx[3] = gglFloatToFixed(params[3]);
lightxv(i, pname, paramsx, c);
}
void glLightxv(GLenum i, GLenum pname, const GLfixed *params)
{
ogles_context_t* c = ogles_context_t::get();
lightxv(i, pname, params, c);
}
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#endif
void glMaterialf(GLenum face, GLenum pname, GLfloat param)
{
ogles_context_t* c = ogles_context_t::get();
materialx(face, pname, gglFloatToFixed(param), c);
}
void glMaterialx(GLenum face, GLenum pname, GLfixed param)
{
ogles_context_t* c = ogles_context_t::get();
materialx(face, pname, param, c);
}
void glMaterialfv(
GLenum face, GLenum pname, const GLfloat *params)
{
ogles_context_t* c = ogles_context_t::get();
if (ggl_unlikely(face != GL_FRONT_AND_BACK)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
GLfixed* what=0;
GLfixed* other=0;
switch (pname) {
case GL_AMBIENT: what = c->lighting.front.ambient.v; break;
case GL_DIFFUSE: what = c->lighting.front.diffuse.v; break;
case GL_SPECULAR: what = c->lighting.front.specular.v; break;
case GL_EMISSION: what = c->lighting.front.emission.v; break;
case GL_AMBIENT_AND_DIFFUSE:
what = c->lighting.front.ambient.v; break;
other = c->lighting.front.diffuse.v; break;
break;
case GL_SHININESS:
c->lighting.front.shininess = gglFloatToFixed(params[0]);
invalidate_lighting(c);
return;
default:
ogles_error(c, GL_INVALID_ENUM);
return;
}
what[0] = gglFloatToFixed(params[0]);
what[1] = gglFloatToFixed(params[1]);
what[2] = gglFloatToFixed(params[2]);
what[3] = gglFloatToFixed(params[3]);
if (other) {
other[0] = what[0];
other[1] = what[1];
other[2] = what[2];
other[3] = what[3];
}
invalidate_lighting(c);
}
void glMaterialxv(
GLenum face, GLenum pname, const GLfixed *params)
{
ogles_context_t* c = ogles_context_t::get();
if (ggl_unlikely(face != GL_FRONT_AND_BACK)) {
ogles_error(c, GL_INVALID_ENUM);
return;
}
GLfixed* what=0;
GLfixed* other=0;
switch (pname) {
case GL_AMBIENT: what = c->lighting.front.ambient.v; break;
case GL_DIFFUSE: what = c->lighting.front.diffuse.v; break;
case GL_SPECULAR: what = c->lighting.front.specular.v; break;
case GL_EMISSION: what = c->lighting.front.emission.v; break;
case GL_AMBIENT_AND_DIFFUSE:
what = c->lighting.front.ambient.v; break;
other= c->lighting.front.diffuse.v; break;
break;
case GL_SHININESS:
c->lighting.front.shininess = gglFloatToFixed(params[0]);
invalidate_lighting(c);
return;
default:
ogles_error(c, GL_INVALID_ENUM);
return;
}
what[0] = params[0];
what[1] = params[1];
what[2] = params[2];
what[3] = params[3];
if (other) {
other[0] = what[0];
other[1] = what[1];
other[2] = what[2];
other[3] = what[3];
}
invalidate_lighting(c);
}
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#pragma mark fog
#endif
void glFogf(GLenum pname, GLfloat param) {
ogles_context_t* c = ogles_context_t::get();
GLfixed paramx = (GLfixed)param;
if (pname != GL_FOG_MODE)
paramx = gglFloatToFixed(param);
fogx(pname, paramx, c);
}
void glFogx(GLenum pname, GLfixed param) {
ogles_context_t* c = ogles_context_t::get();
fogx(pname, param, c);
}
void glFogfv(GLenum pname, const GLfloat *params)
{
ogles_context_t* c = ogles_context_t::get();
if (pname != GL_FOG_COLOR) {
GLfixed paramx = (GLfixed)params[0];
if (pname != GL_FOG_MODE)
paramx = gglFloatToFixed(params[0]);
fogx(pname, paramx, c);
return;
}
GLfixed paramsx[4];
paramsx[0] = gglFloatToFixed(params[0]);
paramsx[1] = gglFloatToFixed(params[1]);
paramsx[2] = gglFloatToFixed(params[2]);
paramsx[3] = gglFloatToFixed(params[3]);
c->rasterizer.procs.fogColor3xv(c, paramsx);
}
void glFogxv(GLenum pname, const GLfixed *params)
{
ogles_context_t* c = ogles_context_t::get();
if (pname != GL_FOG_COLOR) {
fogx(pname, params[0], c);
return;
}
c->rasterizer.procs.fogColor3xv(c, params);
}
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