void
_swrast_select_line(GLcontext *ctx, const SWvertex *v0, const SWvertex *v1)
{
const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
_mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs );
_mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs );
}
void
_swrast_select_line(struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1)
{
const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
_mesa_update_hitflag( ctx, v0->attrib[VARYING_SLOT_POS][2] * zs );
_mesa_update_hitflag( ctx, v1->attrib[VARYING_SLOT_POS][2] * zs );
}
static void
select_line( struct draw_stage *stage, struct prim_header *prim )
{
struct feedback_stage *fs = feedback_stage(stage);
_mesa_update_hitflag( fs->ctx, prim->v[0]->data[0][2] );
_mesa_update_hitflag( fs->ctx, prim->v[1]->data[0][2] );
}
void
_swrast_select_triangle(struct gl_context *ctx, const SWvertex *v0,
const SWvertex *v1, const SWvertex *v2)
{
if (!_swrast_culltriangle(ctx, v0, v1, v2)) {
const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
_mesa_update_hitflag( ctx, v0->attrib[VARYING_SLOT_POS][2] * zs );
_mesa_update_hitflag( ctx, v1->attrib[VARYING_SLOT_POS][2] * zs );
_mesa_update_hitflag( ctx, v2->attrib[VARYING_SLOT_POS][2] * zs );
}
}
void
_swrast_select_triangle(GLcontext *ctx, const SWvertex *v0,
const SWvertex *v1, const SWvertex *v2)
{
if (_swrast_culltriangle(ctx, v0, v1, v2)) {
const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
_mesa_update_hitflag( ctx, v0->attrib[FRAG_ATTRIB_WPOS][2] * zs );
_mesa_update_hitflag( ctx, v1->attrib[FRAG_ATTRIB_WPOS][2] * zs );
_mesa_update_hitflag( ctx, v2->attrib[FRAG_ATTRIB_WPOS][2] * zs );
}
}
void _swrast_select_triangle( GLcontext *ctx,
const SWvertex *v0,
const SWvertex *v1,
const SWvertex *v2)
{
if (_swrast_culltriangle( ctx, v0, v1, v2 )) {
const GLfloat zs = 1.0F / ctx->DepthMaxF;
_mesa_update_hitflag( ctx, v0->win[2] * zs );
_mesa_update_hitflag( ctx, v1->win[2] * zs );
_mesa_update_hitflag( ctx, v2->win[2] * zs );
}
}
/**
* All glWindowPosMESA and glWindowPosARB commands call this function to
* update the current raster position.
*/
static void
window_pos3f(GLfloat x, GLfloat y, GLfloat z)
{
GET_CURRENT_CONTEXT(ctx);
GLfloat z2;
FLUSH_VERTICES(ctx, 0);
FLUSH_CURRENT(ctx, 0);
z2 = CLAMP(z, 0.0F, 1.0F)
* (ctx->ViewportArray[0].Far - ctx->ViewportArray[0].Near)
+ ctx->ViewportArray[0].Near;
/* set raster position */
ctx->Current.RasterPos[0] = x;
ctx->Current.RasterPos[1] = y;
ctx->Current.RasterPos[2] = z2;
ctx->Current.RasterPos[3] = 1.0F;
ctx->Current.RasterPosValid = GL_TRUE;
if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0];
else
ctx->Current.RasterDistance = 0.0;
/* raster color = current color or index */
ctx->Current.RasterColor[0]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][0], 0.0F, 1.0F);
ctx->Current.RasterColor[1]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][1], 0.0F, 1.0F);
ctx->Current.RasterColor[2]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][2], 0.0F, 1.0F);
ctx->Current.RasterColor[3]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][3], 0.0F, 1.0F);
ctx->Current.RasterSecondaryColor[0]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][0], 0.0F, 1.0F);
ctx->Current.RasterSecondaryColor[1]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][1], 0.0F, 1.0F);
ctx->Current.RasterSecondaryColor[2]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][2], 0.0F, 1.0F);
ctx->Current.RasterSecondaryColor[3]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][3], 0.0F, 1.0F);
/* raster texcoord = current texcoord */
{
GLuint texSet;
for (texSet = 0; texSet < ctx->Const.MaxTextureCoordUnits; texSet++) {
assert(texSet < ARRAY_SIZE(ctx->Current.RasterTexCoords));
COPY_4FV( ctx->Current.RasterTexCoords[texSet],
ctx->Current.Attrib[VERT_ATTRIB_TEX0 + texSet] );
}
}
if (ctx->RenderMode==GL_SELECT) {
_mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
}
}
/**
* All glWindowPosMESA and glWindowPosARB commands call this function to
* update the current raster position.
*/
static void
window_pos3f(GLfloat x, GLfloat y, GLfloat z)
{
GET_CURRENT_CONTEXT(ctx);
GLfloat z2;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
FLUSH_CURRENT(ctx, 0);
z2 = CLAMP(z, 0.0F, 1.0F) * (ctx->Viewport.Far - ctx->Viewport.Near)
+ ctx->Viewport.Near;
/* set raster position */
ctx->Current.RasterPos[0] = x;
ctx->Current.RasterPos[1] = y;
ctx->Current.RasterPos[2] = z2;
ctx->Current.RasterPos[3] = 1.0F;
ctx->Current.RasterPosValid = GL_TRUE;
if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0];
else
ctx->Current.RasterDistance = 0.0;
/* raster color = current color or index */
ctx->Current.RasterColor[0]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][0], 0.0F, 1.0F);
ctx->Current.RasterColor[1]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][1], 0.0F, 1.0F);
ctx->Current.RasterColor[2]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][2], 0.0F, 1.0F);
ctx->Current.RasterColor[3]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR0][3], 0.0F, 1.0F);
ctx->Current.RasterSecondaryColor[0]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][0], 0.0F, 1.0F);
ctx->Current.RasterSecondaryColor[1]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][1], 0.0F, 1.0F);
ctx->Current.RasterSecondaryColor[2]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][2], 0.0F, 1.0F);
ctx->Current.RasterSecondaryColor[3]
= CLAMP(ctx->Current.Attrib[VERT_ATTRIB_COLOR1][3], 0.0F, 1.0F);
/* raster texcoord = current texcoord */
COPY_4FV( ctx->Current.RasterTexCoords, ctx->Current.Attrib[VERT_ATTRIB_TEX] );
if (ctx->RenderMode==GL_SELECT) {
_mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
}
}
/*
* Execute glDrawPixels
*/
void
_mesa_DrawPixels( GLsizei width, GLsizei height,
GLenum format, GLenum type, const GLvoid *pixels )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
if (width < 0 || height < 0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
return;
}
if (ctx->RenderMode==GL_RENDER) {
GLint x, y;
if (!pixels || !ctx->Current.RasterPosValid) {
return;
}
if (ctx->NewState) {
_mesa_update_state(ctx);
}
/* Round, to satisfy conformance tests (matches SGI's OpenGL) */
x = IROUND(ctx->Current.RasterPos[0]);
y = IROUND(ctx->Current.RasterPos[1]);
ctx->OcclusionResult = GL_TRUE;
ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
&ctx->Unpack, pixels);
}
else if (ctx->RenderMode==GL_FEEDBACK) {
if (ctx->Current.RasterPosValid) {
FLUSH_CURRENT(ctx, 0);
FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
_mesa_feedback_vertex( ctx,
ctx->Current.RasterPos,
ctx->Current.RasterColor,
ctx->Current.RasterIndex,
ctx->Current.RasterTexCoord );
}
}
else if (ctx->RenderMode==GL_SELECT) {
if (ctx->Current.RasterPosValid) {
_mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
}
}
}
void
_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
GLenum type )
{
GET_CURRENT_CONTEXT(ctx);
GLint destx, desty;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
if (width < 0 || height < 0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)" );
return;
}
if (ctx->NewState) {
_mesa_update_state(ctx);
}
if (ctx->RenderMode==GL_RENDER) {
/* Destination of copy: */
if (!ctx->Current.RasterPosValid) {
return;
}
/* Round, to satisfy conformance tests (matches SGI's OpenGL) */
destx = IROUND(ctx->Current.RasterPos[0]);
desty = IROUND(ctx->Current.RasterPos[1]);
ctx->OcclusionResult = GL_TRUE;
ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
type );
}
else if (ctx->RenderMode == GL_FEEDBACK) {
if (ctx->Current.RasterPosValid) {
FLUSH_CURRENT(ctx, 0);
FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
_mesa_feedback_vertex( ctx,
ctx->Current.RasterPos,
ctx->Current.RasterColor,
ctx->Current.RasterIndex,
ctx->Current.RasterTexCoord );
}
}
else if (ctx->RenderMode == GL_SELECT) {
_mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
}
}
/**
* Normally, this function would render a GL_POINT.
*/
static void
rastpos_point(struct draw_stage *stage, struct prim_header *prim)
{
struct rastpos_stage *rs = rastpos_stage(stage);
struct gl_context *ctx = rs->ctx;
struct st_context *st = st_context(ctx);
const GLfloat height = (GLfloat) ctx->DrawBuffer->Height;
const GLuint *outputMapping = st->vertex_result_to_slot;
const GLfloat *pos;
GLuint i;
/* if we get here, we didn't get clipped */
ctx->Current.RasterPosValid = GL_TRUE;
/* update raster pos */
pos = prim->v[0]->data[0];
ctx->Current.RasterPos[0] = pos[0];
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP)
ctx->Current.RasterPos[1] = height - pos[1]; /* invert Y */
else
ctx->Current.RasterPos[1] = pos[1];
ctx->Current.RasterPos[2] = pos[2];
ctx->Current.RasterPos[3] = pos[3];
/* update other raster attribs */
update_attrib(ctx, outputMapping, prim->v[0],
ctx->Current.RasterColor,
VARYING_SLOT_COL0, VERT_ATTRIB_COLOR0);
update_attrib(ctx, outputMapping, prim->v[0],
ctx->Current.RasterSecondaryColor,
VARYING_SLOT_COL1, VERT_ATTRIB_COLOR1);
for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
update_attrib(ctx, outputMapping, prim->v[0],
ctx->Current.RasterTexCoords[i],
VARYING_SLOT_TEX0 + i, VERT_ATTRIB_TEX0 + i);
}
if (ctx->RenderMode == GL_SELECT) {
_mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
}
}
/**
* glRasterPos transformation. Typically called via ctx->Driver.RasterPos().
*
* \param vObj vertex position in object space
*/
void
_mesa_RasterPos(struct gl_context *ctx, const GLfloat vObj[4])
{
if (_mesa_arb_vertex_program_enabled(ctx)) {
/* XXX implement this */
_mesa_problem(ctx, "Vertex programs not implemented for glRasterPos");
return;
}
else {
GLfloat eye[4], clip[4], ndc[3], d;
GLfloat *norm, eyenorm[3];
GLfloat *objnorm = ctx->Current.Attrib[VERT_ATTRIB_NORMAL];
float scale[3], translate[3];
/* apply modelview matrix: eye = MV * obj */
TRANSFORM_POINT( eye, ctx->ModelviewMatrixStack.Top->m, vObj );
/* apply projection matrix: clip = Proj * eye */
TRANSFORM_POINT( clip, ctx->ProjectionMatrixStack.Top->m, eye );
/* clip to view volume. */
if (!ctx->Transform.DepthClamp) {
if (viewclip_point_z(clip) == 0) {
ctx->Current.RasterPosValid = GL_FALSE;
return;
}
}
if (!ctx->Transform.RasterPositionUnclipped) {
if (viewclip_point_xy(clip) == 0) {
ctx->Current.RasterPosValid = GL_FALSE;
return;
}
}
/* clip to user clipping planes */
if (ctx->Transform.ClipPlanesEnabled && !userclip_point(ctx, clip)) {
ctx->Current.RasterPosValid = GL_FALSE;
return;
}
/* ndc = clip / W */
d = (clip[3] == 0.0F) ? 1.0F : 1.0F / clip[3];
ndc[0] = clip[0] * d;
ndc[1] = clip[1] * d;
ndc[2] = clip[2] * d;
/* wincoord = viewport_mapping(ndc) */
_mesa_get_viewport_xform(ctx, 0, scale, translate);
ctx->Current.RasterPos[0] = ndc[0] * scale[0] + translate[0];
ctx->Current.RasterPos[1] = ndc[1] * scale[1] + translate[1];
ctx->Current.RasterPos[2] = ndc[2] * scale[2] + translate[2];
ctx->Current.RasterPos[3] = clip[3];
if (ctx->Transform.DepthClamp) {
ctx->Current.RasterPos[3] = CLAMP(ctx->Current.RasterPos[3],
ctx->ViewportArray[0].Near,
ctx->ViewportArray[0].Far);
}
/* compute raster distance */
if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0];
else
ctx->Current.RasterDistance =
sqrtf( eye[0]*eye[0] + eye[1]*eye[1] + eye[2]*eye[2] );
/* compute transformed normal vector (for lighting or texgen) */
if (ctx->_NeedEyeCoords) {
const GLfloat *inv = ctx->ModelviewMatrixStack.Top->inv;
TRANSFORM_NORMAL( eyenorm, objnorm, inv );
norm = eyenorm;
}
else {
norm = objnorm;
}
/* update raster color */
if (ctx->Light.Enabled) {
/* lighting */
shade_rastpos( ctx, vObj, norm,
ctx->Current.RasterColor,
ctx->Current.RasterSecondaryColor );
}
else {
/* use current color */
COPY_4FV(ctx->Current.RasterColor,
ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
COPY_4FV(ctx->Current.RasterSecondaryColor,
ctx->Current.Attrib[VERT_ATTRIB_COLOR1]);
}
/* texture coords */
{
GLuint u;
for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) {
GLfloat tc[4];
COPY_4V(tc, ctx->Current.Attrib[VERT_ATTRIB_TEX0 + u]);
if (ctx->Texture.Unit[u].TexGenEnabled) {
compute_texgen(ctx, vObj, eye, norm, u, tc);
}
TRANSFORM_POINT(ctx->Current.RasterTexCoords[u],
ctx->TextureMatrixStack[u].Top->m, tc);
}
}
ctx->Current.RasterPosValid = GL_TRUE;
}
if (ctx->RenderMode == GL_SELECT) {
_mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] );
}
}
void _swrast_select_point( GLcontext *ctx, const SWvertex *v )
{
const GLfloat zs = 1.0F / ctx->DepthMaxF;
_mesa_update_hitflag( ctx, v->win[2] * zs );
}
void _swrast_select_line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 )
{
const GLfloat zs = 1.0F / ctx->DepthMaxF;
_mesa_update_hitflag( ctx, v0->win[2] * zs );
_mesa_update_hitflag( ctx, v1->win[2] * zs );
}
void
_swrast_select_point(struct gl_context *ctx, const SWvertex *v)
{
const GLfloat zs = 1.0F / ctx->DrawBuffer->_DepthMaxF;
_mesa_update_hitflag( ctx, v->attrib[FRAG_ATTRIB_WPOS][2] * zs );
}