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-rw-r--r--src/mesa/main/rastpos.c188
1 files changed, 100 insertions, 88 deletions
diff --git a/src/mesa/main/rastpos.c b/src/mesa/main/rastpos.c
index 5c019bd00ba..3c48a3afece 100644
--- a/src/mesa/main/rastpos.c
+++ b/src/mesa/main/rastpos.c
@@ -39,11 +39,10 @@
#include "math/m_xform.h"
-/*
+/**
* Clip a point against the view volume.
- * Input: v - vertex-vector describing the point to clip
- * Return: 0 = outside view volume
- * 1 = inside view volume
+ * \param v vertex-vector describing the point to clip
+ * \return 0 = outside view volume, 1 = inside view volume
*/
static GLuint
viewclip_point( const GLfloat v[] )
@@ -73,14 +72,13 @@ viewclip_point_z( const GLfloat v[] )
-/*
+/**
* Clip a point against the user clipping planes.
- * Input: v - vertex-vector describing the point to clip.
- * Return: 0 = point was clipped
- * 1 = point not clipped
+ * \param v vertex-vector describing the point to clip.
+ * \return 0 = point was clipped, 1 = point not clipped
*/
static GLuint
-userclip_point( GLcontext* ctx, const GLfloat v[] )
+userclip_point( GLcontext *ctx, const GLfloat v[] )
{
GLuint p;
@@ -100,7 +98,8 @@ userclip_point( GLcontext* ctx, const GLfloat v[] )
}
-/* This has been split off to allow the normal shade routines to
+/**
+ * This has been split off to allow the normal shade routines to
* get a little closer to the vertex buffer, and to use the
* GLvector objects directly.
* Input: ctx - the context
@@ -262,11 +261,12 @@ shade_rastpos(GLcontext *ctx,
}
*Rindex = (GLuint) (GLint) ind;
}
-
}
-/*
- * Caller: context->API.RasterPos4f
+
+/**
+ * All glRasterPos command call this function to update the current
+ * raster position.
*/
static void
raster_pos4f(GLcontext *ctx, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
@@ -278,100 +278,107 @@ raster_pos4f(GLcontext *ctx, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
if (ctx->NewState)
_mesa_update_state( ctx );
- ASSIGN_4V( v, x, y, z, w );
- TRANSFORM_POINT( eye, ctx->ModelviewMatrixStack.Top->m, v );
+ if (ctx->VertexProgram.Enabled) {
+ /* XXX implement this */
+ _mesa_problem(ctx, "Vertex programs not implemented for glRasterPos");
+ return;
+ }
+ else {
+ ASSIGN_4V( v, x, y, z, w );
+ TRANSFORM_POINT( eye, ctx->ModelviewMatrixStack.Top->m, v );
+
+ /* raster color */
+ if (ctx->Light.Enabled) {
+ GLfloat *norm, eyenorm[3];
+ GLfloat *objnorm = ctx->Current.Attrib[VERT_ATTRIB_NORMAL];
+
+ if (ctx->_NeedEyeCoords) {
+ GLfloat *inv = ctx->ModelviewMatrixStack.Top->inv;
+ TRANSFORM_NORMAL( eyenorm, objnorm, inv );
+ norm = eyenorm;
+ }
+ else {
+ norm = objnorm;
+ }
- /* raster color */
- if (ctx->Light.Enabled) {
- GLfloat *norm, eyenorm[3];
- GLfloat *objnorm = ctx->Current.Attrib[VERT_ATTRIB_NORMAL];
+ shade_rastpos( ctx, v, norm,
+ ctx->Current.RasterColor,
+ ctx->Current.RasterSecondaryColor,
+ &ctx->Current.RasterIndex );
- if (ctx->_NeedEyeCoords) {
- GLfloat *inv = ctx->ModelviewMatrixStack.Top->inv;
- TRANSFORM_NORMAL( eyenorm, objnorm, inv );
- norm = eyenorm;
}
else {
- norm = objnorm;
+ /* use current color or index */
+ if (ctx->Visual.rgbMode) {
+ COPY_4FV(ctx->Current.RasterColor,
+ ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
+ COPY_4FV(ctx->Current.RasterSecondaryColor,
+ ctx->Current.Attrib[VERT_ATTRIB_COLOR1]);
+ }
+ else {
+ ctx->Current.RasterIndex = ctx->Current.Index;
+ }
}
- shade_rastpos( ctx, v, norm,
- ctx->Current.RasterColor,
- ctx->Current.RasterSecondaryColor,
- &ctx->Current.RasterIndex );
-
- }
- else {
- /* use current color or index */
- if (ctx->Visual.rgbMode) {
- COPY_4FV(ctx->Current.RasterColor,
- ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
- COPY_4FV(ctx->Current.RasterSecondaryColor,
- ctx->Current.Attrib[VERT_ATTRIB_COLOR1]);
+ /* 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] );
+
+ /* apply projection matrix: clip = Proj * eye */
+ TRANSFORM_POINT( clip, ctx->ProjectionMatrixStack.Top->m, eye );
+
+ /* clip to view volume */
+ if (ctx->Transform.RasterPositionUnclipped) {
+ /* GL_IBM_rasterpos_clip: only clip against Z */
+ if (viewclip_point_z(clip) == 0) {
+ ctx->Current.RasterPosValid = GL_FALSE;
+ return;
+ }
}
- else {
- ctx->Current.RasterIndex = ctx->Current.Index;
+ else if (viewclip_point(clip) == 0) {
+ /* Normal OpenGL behaviour */
+ ctx->Current.RasterPosValid = GL_FALSE;
+ return;
}
- }
- /* 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] );
-
- /* apply projection matrix: clip = Proj * eye */
- TRANSFORM_POINT( clip, ctx->ProjectionMatrixStack.Top->m, eye );
-
- /* clip to view volume */
- if (ctx->Transform.RasterPositionUnclipped) {
- /* GL_IBM_rasterpos_clip: only clip against Z */
- if (viewclip_point_z(clip) == 0) {
+ /* clip to user clipping planes */
+ if (ctx->Transform.ClipPlanesEnabled && !userclip_point(ctx, clip)) {
ctx->Current.RasterPosValid = GL_FALSE;
return;
}
- }
- else if (viewclip_point(clip) == 0) {
- /* Normal OpenGL behaviour */
- 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 */
- ASSERT( clip[3]!=0.0 );
- d = 1.0F / clip[3];
- ndc[0] = clip[0] * d;
- ndc[1] = clip[1] * d;
- ndc[2] = clip[2] * d;
-
- ctx->Current.RasterPos[0] = (ndc[0] * ctx->Viewport._WindowMap.m[MAT_SX] +
- ctx->Viewport._WindowMap.m[MAT_TX]);
- ctx->Current.RasterPos[1] = (ndc[1] * ctx->Viewport._WindowMap.m[MAT_SY] +
- ctx->Viewport._WindowMap.m[MAT_TY]);
- ctx->Current.RasterPos[2] = (ndc[2] * ctx->Viewport._WindowMap.m[MAT_SZ] +
- ctx->Viewport._WindowMap.m[MAT_TZ]) / ctx->DepthMaxF;
- ctx->Current.RasterPos[3] = clip[3];
- ctx->Current.RasterPosValid = GL_TRUE;
+ /* ndc = clip / W */
+ ASSERT( clip[3]!=0.0 );
+ d = 1.0F / clip[3];
+ ndc[0] = clip[0] * d;
+ ndc[1] = clip[1] * d;
+ ndc[2] = clip[2] * d;
+
+ ctx->Current.RasterPos[0] = (ndc[0] * ctx->Viewport._WindowMap.m[MAT_SX] +
+ ctx->Viewport._WindowMap.m[MAT_TX]);
+ ctx->Current.RasterPos[1] = (ndc[1] * ctx->Viewport._WindowMap.m[MAT_SY] +
+ ctx->Viewport._WindowMap.m[MAT_TY]);
+ ctx->Current.RasterPos[2] = (ndc[2] * ctx->Viewport._WindowMap.m[MAT_SZ] +
+ ctx->Viewport._WindowMap.m[MAT_TZ]) / ctx->DepthMaxF;
+ ctx->Current.RasterPos[3] = clip[3];
+ ctx->Current.RasterPosValid = GL_TRUE;
- {
- GLuint texSet;
- for (texSet = 0; texSet < ctx->Const.MaxTextureUnits; texSet++) {
- COPY_4FV( ctx->Current.RasterTexCoords[texSet],
- ctx->Current.Attrib[VERT_ATTRIB_TEX0 + texSet] );
+ {
+ GLuint texSet;
+ for (texSet = 0; texSet < ctx->Const.MaxTextureCoordUnits; texSet++) {
+ 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] );
}
-
}
@@ -527,6 +534,11 @@ _mesa_RasterPos4sv(const GLshort *v)
/*** GL_ARB_window_pos / GL_MESA_window_pos ***/
/**********************************************************************/
+
+/**
+ * All glWindowPosMESA and glWindowPosARB commands call this function to
+ * update the current raster position.
+ */
static void
window_pos3f(GLfloat x, GLfloat y, GLfloat z)
{
@@ -578,7 +590,7 @@ window_pos3f(GLfloat x, GLfloat y, GLfloat z)
/* raster texcoord = current texcoord */
{
GLuint texSet;
- for (texSet = 0; texSet < ctx->Const.MaxTextureUnits; texSet++) {
+ for (texSet = 0; texSet < ctx->Const.MaxTextureCoordUnits; texSet++) {
COPY_4FV( ctx->Current.RasterTexCoords[texSet],
ctx->Current.Attrib[VERT_ATTRIB_TEX0 + texSet] );
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 17:41:42 +0000