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);
}
void ogles_viewport(ogles_context_t* c,
GLint x, GLint y, GLsizei w, GLsizei h)
{
if ((w|h)<0) {
ogles_error(c, GL_INVALID_VALUE);
return;
}
c->viewport.x = x;
c->viewport.y = y;
c->viewport.w = w;
c->viewport.h = h;
x += c->viewport.surfaceport.x;
y += c->viewport.surfaceport.y;
GLint H = c->rasterizer.state.buffers.color.height;
GLfloat sx = div2f(w);
GLfloat ox = sx + x;
GLfloat sy = div2f(h);
GLfloat oy = sy - y + (H - h);
GLfloat near = c->transforms.vpt.zNear;
GLfloat far = c->transforms.vpt.zFar;
GLfloat A = div2f(far - near);
GLfloat B = div2f(far + near);
// compute viewport matrix
GLfloat* const f = c->transforms.vpt.matrix.editElements();
f[0] = sx; f[4] = 0; f[ 8] = 0; f[12] = ox;
f[1] = 0; f[5] =-sy; f[ 9] = 0; f[13] = oy;
f[2] = 0; f[6] = 0; f[10] = A; f[14] = B;
f[3] = 0; f[7] = 0; f[11] = 0; f[15] = 1;
c->transforms.dirty |= transform_state_t::VIEWPORT;
}
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 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;
}
}
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);
}
void ogles_scissor(ogles_context_t* c,
GLint x, GLint y, GLsizei w, GLsizei h)
{
if ((w|h) < 0) {
ogles_error(c, GL_INVALID_VALUE);
return;
}
c->viewport.scissor.x = x;
c->viewport.scissor.y = y;
c->viewport.scissor.w = w;
c->viewport.scissor.h = h;
x += c->viewport.surfaceport.x;
y += c->viewport.surfaceport.y;
y = c->rasterizer.state.buffers.color.height - (y + h);
c->rasterizer.procs.scissor(c, x, y, w, h);
}
static void frustumf(
GLfloat left, GLfloat right,
GLfloat bottom, GLfloat top,
GLfloat zNear, GLfloat zFar,
ogles_context_t* c)
{
if (cmpf(left,right) ||
cmpf(top, bottom) ||
cmpf(zNear, zFar) ||
isZeroOrNegativef(zNear) ||
isZeroOrNegativef(zFar))
{
ogles_error(c, GL_INVALID_VALUE);
return;
}
const GLfloat r_width = reciprocalf(right - left);
const GLfloat r_height = reciprocalf(top - bottom);
const GLfloat r_depth = reciprocalf(zNear - zFar);
const GLfloat x = mul2f(zNear * r_width);
const GLfloat y = mul2f(zNear * r_height);
const GLfloat A = mul2f((right + left) * r_width);
const GLfloat B = (top + bottom) * r_height;
const GLfloat C = (zFar + zNear) * r_depth;
const GLfloat D = mul2f(zFar * zNear * r_depth);
GLfloat f[16];
f[ 0] = x;
f[ 5] = y;
f[ 8] = A;
f[ 9] = B;
f[10] = C;
f[14] = D;
f[11] = -1.0f;
f[ 1] = f[ 2] = f[ 3] =
f[ 4] = f[ 6] = f[ 7] =
f[12] = f[13] = f[15] = 0.0f;
matrixf_t rhs;
rhs.set(f);
c->transforms.current->multiply(rhs);
c->transforms.invalidate();
}
static void orthof(
GLfloat left, GLfloat right,
GLfloat bottom, GLfloat top,
GLfloat zNear, GLfloat zFar,
ogles_context_t* c)
{
if (cmpf(left,right) ||
cmpf(top, bottom) ||
cmpf(zNear, zFar))
{
ogles_error(c, GL_INVALID_VALUE);
return;
}
const GLfloat r_width = reciprocalf(right - left);
const GLfloat r_height = reciprocalf(top - bottom);
const GLfloat r_depth = reciprocalf(zFar - zNear);
const GLfloat x = mul2f(r_width);
const GLfloat y = mul2f(r_height);
const GLfloat z = -mul2f(r_depth);
const GLfloat tx = -(right + left) * r_width;
const GLfloat ty = -(top + bottom) * r_height;
const GLfloat tz = -(zFar + zNear) * r_depth;
GLfloat f[16];
f[ 0] = x;
f[ 5] = y;
f[10] = z;
f[12] = tx;
f[13] = ty;
f[14] = tz;
f[15] = 1.0f;
f[ 1] = f[ 2] = f[ 3] =
f[ 4] = f[ 6] = f[ 7] =
f[ 8] = f[ 9] = f[11] = 0.0f;
matrixf_t rhs;
rhs.set(f);
c->transforms.current->multiply(rhs);
c->transforms.invalidate();
}
static void enable_disable(ogles_context_t* c, GLenum cap, int enabled)
{
if ((cap >= GL_LIGHT0) && (cap<GL_LIGHT0+OGLES_MAX_LIGHTS)) {
c->lighting.lights[cap-GL_LIGHT0].enable = enabled;
c->lighting.enabledLights &= ~(1<<(cap-GL_LIGHT0));
c->lighting.enabledLights |= (enabled<<(cap-GL_LIGHT0));
return;
}
switch (cap) {
case GL_POINT_SMOOTH:
c->point.smooth = enabled;
break;
case GL_LINE_SMOOTH:
c->line.smooth = enabled;
break;
case GL_POLYGON_OFFSET_FILL:
c->polygonOffset.enable = enabled;
break;
case GL_CULL_FACE:
c->cull.enable = enabled;
break;
case GL_LIGHTING:
c->lighting.enable = enabled;
break;
case GL_COLOR_MATERIAL:
c->lighting.colorMaterial.enable = enabled;
break;
case GL_NORMALIZE:
case GL_RESCALE_NORMAL:
c->transforms.rescaleNormals = enabled ? cap : 0;
// XXX: invalidate mvit
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:
c->clipPlanes.enable &= ~(1<<(cap-GL_CLIP_PLANE0));
c->clipPlanes.enable |= (enabled<<(cap-GL_CLIP_PLANE0));
ogles_invalidate_perspective(c);
break;
case GL_FOG:
case GL_DEPTH_TEST:
ogles_invalidate_perspective(c);
// fall-through...
case GL_BLEND:
case GL_SCISSOR_TEST:
case GL_ALPHA_TEST:
case GL_COLOR_LOGIC_OP:
case GL_DITHER:
case GL_STENCIL_TEST:
case GL_TEXTURE_2D:
// these need to fall through into the rasterizer
c->rasterizer.procs.enableDisable(c, cap, enabled);
break;
case GL_MULTISAMPLE:
case GL_SAMPLE_ALPHA_TO_COVERAGE:
case GL_SAMPLE_ALPHA_TO_ONE:
case GL_SAMPLE_COVERAGE:
// not supported in this implementation
break;
default:
ogles_error(c, GL_INVALID_ENUM);
return;
}
}
