diff options
| -rw-r--r-- | src/mesa/state_tracker/st_cb_rasterpos.c | 440 | ||||
| -rw-r--r-- | src/mesa/state_tracker/st_context.h | 3 |
2 files changed, 160 insertions, 283 deletions
diff --git a/src/mesa/state_tracker/st_cb_rasterpos.c b/src/mesa/state_tracker/st_cb_rasterpos.c index 5b97c1ee342..5279cb1cd41 100644 --- a/src/mesa/state_tracker/st_cb_rasterpos.c +++ b/src/mesa/state_tracker/st_cb_rasterpos.c @@ -25,353 +25,229 @@ * **************************************************************************/ - /* - * Authors: - * Brian Paul - */ +/** + * glRasterPos implementation. Basically render a GL_POINT with our + * private draw module. Plug in a special "rasterpos" stage at the end + * of the 'draw' pipeline to capture the results and update the current + * raster pos attributes. + * + * Authors: + * Brian Paul + */ + #include "main/imports.h" -#include "main/feedback.h" #include "main/macros.h" #include "st_context.h" #include "st_atom.h" -#include "st_cache.h" #include "st_draw.h" -#include "st_program.h" #include "st_cb_rasterpos.h" #include "st_draw.h" -#include "st_format.h" -#include "pipe/p_context.h" -#include "pipe/p_defines.h" -#include "pipe/p_winsys.h" +#include "pipe/draw/draw_context.h" +#include "pipe/draw/draw_private.h" #include "shader/prog_instruction.h" +#include "vbo/vbo.h" -static void -setup_vertex_attribs(GLcontext *ctx) +/** + * Our special drawing pipeline stage (replaces rasterization). + */ +struct rastpos_stage { - struct pipe_context *pipe = ctx->st->pipe; - const struct cso_vertex_shader *vs = ctx->st->state.vs; - const struct st_vertex_program *stvp = ctx->st->vp; - uint slot; - - /* all attributes come from the default attribute buffer */ - { - struct pipe_vertex_buffer vbuffer; - vbuffer.buffer = ctx->st->default_attrib_buffer; - vbuffer.buffer_offset = 0; - vbuffer.pitch = 0; /* must be zero! */ - vbuffer.max_index = 1; - pipe->set_vertex_buffer(pipe, 0, &vbuffer); - } + struct draw_stage stage; /**< Base class */ + GLcontext *ctx; /**< Rendering context */ - for (slot = 0; slot < vs->state.num_inputs; slot++) { - struct pipe_vertex_element velement; - const GLuint attr = stvp->index_to_input[slot]; + /* vertex attrib info we can setup once and re-use */ + struct gl_client_array array[VERT_ATTRIB_MAX]; + const struct gl_client_array *arrays[VERT_ATTRIB_MAX]; + struct _mesa_prim prim; +}; - velement.src_offset = attr * 4 * sizeof(GLfloat); - velement.vertex_buffer_index = 0; - velement.dst_offset = 0; - velement.src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; - pipe->set_vertex_element(pipe, slot, &velement); - } -} +static INLINE struct rastpos_stage * +rastpos_stage( struct draw_stage *stage ) +{ + return (struct rastpos_stage *) stage; +} static void -setup_feedback(GLcontext *ctx) +rastpos_begin( struct draw_stage *stage ) { - struct pipe_context *pipe = ctx->st->pipe; - const struct pipe_shader_state *vs = &ctx->st->state.vs->state; - struct pipe_feedback_state feedback; - uint i; - - memset(&feedback, 0, sizeof(feedback)); - feedback.enabled = 1; - feedback.interleaved = 1; - feedback.discard = 1; - feedback.num_attribs = 0; - - /* feedback all results from vertex shader */ - for (i = 0; i < vs->num_outputs; i++) { - feedback.attrib[feedback.num_attribs] = i; - feedback.size[feedback.num_attribs] = 4; - feedback.num_attribs++; - } - - if (pipe->set_feedback_state) - pipe->set_feedback_state(pipe, &feedback); + /* no-op */ } +static void +rastpos_end( struct draw_stage *stage ) +{ + /* no-op */ +} - - - -/** - * Clip a point against the view volume. - * - * \param v vertex vector describing the point to clip. - * - * \return zero if outside view volume, or one if inside. - */ -static GLuint -viewclip_point( const GLfloat v[] ) +static void +rastpos_reset_stipple_counter( struct draw_stage *stage ) { - if ( v[0] > v[3] || v[0] < -v[3] - || v[1] > v[3] || v[1] < -v[3] - || v[2] > v[3] || v[2] < -v[3] ) { - return 0; - } - else { - return 1; - } + /* no-op */ } +static void +rastpos_tri( struct draw_stage *stage, struct prim_header *prim ) +{ + /* should never get here */ + assert(0); +} -/** - * Clip a point against the far/near Z clipping planes. - * - * \param v vertex vector describing the point to clip. - * - * \return zero if outside view volume, or one if inside. - */ -static GLuint -viewclip_point_z( const GLfloat v[] ) +static void +rastpos_line( struct draw_stage *stage, struct prim_header *prim ) { - if (v[2] > v[3] || v[2] < -v[3] ) { - return 0; - } - else { - return 1; - } + /* should never get here */ + assert(0); } /** - * Clip a point against the user clipping planes. - * - * \param ctx GL context. - * \param v vertex vector describing the point to clip. - * - * \return zero if the point was clipped, or one otherwise. + * Update a raster pos attribute from the vertex result if it's present, + * else copy the current attrib. */ -static GLuint -userclip_point( GLcontext *ctx, const GLfloat v[] ) +static void +update_attrib(GLcontext *ctx, const GLuint *outputMapping, + const struct vertex_header *vert, + GLfloat *dest, + GLuint result, GLuint defaultAttrib) { - GLuint p; - - for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { - if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { - GLfloat dot = v[0] * ctx->Transform._ClipUserPlane[p][0] - + v[1] * ctx->Transform._ClipUserPlane[p][1] - + v[2] * ctx->Transform._ClipUserPlane[p][2] - + v[3] * ctx->Transform._ClipUserPlane[p][3]; - if (dot < 0.0F) { - return 0; - } - } - } - - return 1; + const GLfloat *src; + const GLuint k = outputMapping[result]; + if (k != ~0) + src = vert->data[k]; + else + src = ctx->Current.Attrib[defaultAttrib]; + COPY_4V(dest, src); } /** - * Update the current raster position. - * Do clip testing, etc. here. + * Normally, this function would render a GL_POINT. */ static void -update_rasterpos(GLcontext *ctx, - const float clipPos[4], - const float color0[4], - const float color1[4], - const float *fog, - const float *tex) +rastpos_point(struct draw_stage *stage, struct prim_header *prim) { - uint i; - float d, ndc[3]; - - /* clip to view volume */ - if (ctx->Transform.RasterPositionUnclipped) { - /* GL_IBM_rasterpos_clip: only clip against Z */ - if (viewclip_point_z(clipPos) == 0) { - ctx->Current.RasterPosValid = GL_FALSE; - return; - } - } - else if (viewclip_point(clipPos) == 0) { - /* Normal OpenGL behaviour */ - ctx->Current.RasterPosValid = GL_FALSE; - return; - } - - /* clip to user clipping planes */ - if (ctx->Transform.ClipPlanesEnabled && !userclip_point(ctx, clipPos)) { - ctx->Current.RasterPosValid = GL_FALSE; - return; - } + struct rastpos_stage *rs = rastpos_stage(stage); + GLcontext *ctx = rs->ctx; + struct st_context *st = ctx->st; + const GLfloat height = 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]; + ctx->Current.RasterPos[1] = height - 1 - pos[1]; + ctx->Current.RasterPos[2] = pos[2]; + ctx->Current.RasterPos[3] = pos[3]; - /* - * update current raster position - */ - /* ndc = clip / W */ - d = (clipPos[3] == 0.0F) ? 1.0F : 1.0F / clipPos[3]; - ndc[0] = clipPos[0] * d; - ndc[1] = clipPos[1] * d; - ndc[2] = clipPos[2] * d; - /* wincoord = viewport_mapping(ndc) */ - 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->DrawBuffer->_DepthMaxF; - ctx->Current.RasterPos[3] = clipPos[3]; - - /* compute raster distance */ -#if 0 - if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) - ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0]; - else { - /* XXX we don't have an eye coord! */ - ctx->Current.RasterDistance = - SQRTF( eye[0]*eye[0] + eye[1]*eye[1] + eye[2]*eye[2] ); - } -#else - ctx->Current.RasterDistance = fog[0]; -#endif - - /* colors and texcoords */ - COPY_4FV(ctx->Current.RasterColor, color0); - COPY_4FV(ctx->Current.RasterSecondaryColor, color1); - for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) { - COPY_4FV(ctx->Current.RasterTexCoords + i, tex + i *4); - } + /* update other raster attribs */ + update_attrib(ctx, outputMapping, prim->v[0], + ctx->Current.RasterColor, + VERT_RESULT_COL0, VERT_ATTRIB_COLOR0); - ctx->Current.RasterPosValid = GL_TRUE; + update_attrib(ctx, outputMapping, prim->v[0], + ctx->Current.RasterSecondaryColor, + VERT_RESULT_COL1, VERT_ATTRIB_COLOR1); - if (ctx->RenderMode == GL_SELECT) { - _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] ); + for (i = 0; i < MAX_TEXTURE_UNITS; i++) { + update_attrib(ctx, outputMapping, prim->v[0], + ctx->Current.RasterTexCoords[i], + VERT_RESULT_TEX0 + i, VERT_ATTRIB_TEX0 + i); } } +/** + * Create rasterpos "drawing" stage. + */ +static struct rastpos_stage * +new_draw_rastpos_stage(GLcontext *ctx, struct draw_context *draw) +{ + struct rastpos_stage *rs = CALLOC_STRUCT(rastpos_stage); + + rs->stage.draw = draw; + rs->stage.next = NULL; + rs->stage.begin = rastpos_begin; + rs->stage.point = rastpos_point; + rs->stage.line = rastpos_line; + rs->stage.tri = rastpos_tri; + rs->stage.end = rastpos_end; + rs->stage.reset_stipple_counter = rastpos_reset_stipple_counter; + rs->ctx = ctx; + + return rs; +} + static void st_RasterPos(GLcontext *ctx, const GLfloat v[4]) { - const struct st_context *st = ctx->st; - struct pipe_context *pipe = st->pipe; - float *buf_map; - struct pipe_feedback_buffer fb_buf; + struct st_context *st = ctx->st; + struct draw_context *draw = st->draw; + struct rastpos_stage *rs; - st_validate_state(ctx->st); - - /* setup vertex buffers */ - setup_vertex_attribs(ctx); - - /* - * Load the default attribute buffer with current attribs. - */ - { - struct pipe_buffer_handle *buf = st->default_attrib_buffer; - const unsigned size = sizeof(ctx->Current.Attrib); - const void *data = ctx->Current.Attrib; - /* colors, texcoords, etc */ - pipe->winsys->buffer_data(pipe->winsys, buf, - size, data, - PIPE_BUFFER_USAGE_VERTEX); - /* position */ - pipe->winsys->buffer_subdata(pipe->winsys, buf, - 0, /* offset */ - 4 * sizeof(float), /* size */ - v); /* data */ + if (st->rastpos_stage) { + /* get rastpos stage info */ + rs = rastpos_stage(st->rastpos_stage); } - - - /* setup feedback state */ - setup_feedback(ctx); - - /* setup vertex feedback buffer */ - { - fb_buf.size = 8 * 4 * sizeof(float); - fb_buf.buffer = pipe->winsys->buffer_create(pipe->winsys, 0); - fb_buf.start_offset = 0; - pipe->winsys->buffer_data(pipe->winsys, fb_buf.buffer, - fb_buf.size, - NULL, /* data */ - PIPE_BUFFER_USAGE_VERTEX); - if (pipe->set_feedback_buffer) - pipe->set_feedback_buffer(pipe, 0, &fb_buf); - } - - - /* draw a point */ - pipe->draw_arrays(pipe, GL_POINTS, 0, 1); - - /* get feedback */ - buf_map = (float *) pipe->winsys->buffer_map(pipe->winsys, fb_buf.buffer, - PIPE_BUFFER_FLAG_READ); - - /* extract values and update rasterpos state */ - { - const GLuint *outputMapping = st->vertex_result_to_slot; - const float *pos, *color0, *color1, *fog, *tex0; - float *buf = buf_map; - - assert(outputMapping[VERT_RESULT_HPOS] != ~0); - pos = buf; - buf += 4; - - if (outputMapping[VERT_RESULT_COL0] != ~0) { - color0 = buf; - buf += 4; - } - else { - color0 = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; + else { + /* create rastpos draw stage */ + GLuint i; + + rs = new_draw_rastpos_stage(ctx, draw); + st->rastpos_stage = &rs->stage; + + /* one-time init */ + for (i = 0; i < VERT_ATTRIB_MAX; i++) { + rs->array[i].Size = 4; + rs->array[i].Type = GL_FLOAT; + rs->array[i].Stride = 0; + rs->array[i].StrideB = 0; + rs->array[i].Ptr = (GLubyte *) ctx->Current.Attrib[i]; + rs->array[i].Enabled = GL_TRUE; + rs->array[i].Normalized = GL_TRUE; + rs->array[i].BufferObj = NULL; + rs->arrays[i] = &rs->array[i]; } - if (outputMapping[VERT_RESULT_COL1] != ~0) { - color1 = buf; - buf += 4; - } - else { - color1 = ctx->Current.Attrib[VERT_ATTRIB_COLOR1]; - } + rs->prim.mode = GL_POINTS; + rs->prim.indexed = 0; + rs->prim.begin = 1; + rs->prim.end = 1; + rs->prim.weak = 0; + rs->prim.start = 0; + rs->prim.count = 1; + } - if (outputMapping[VERT_RESULT_FOGC] != ~0) { - fog = buf; - buf += 4; - } - else { - fog = ctx->Current.Attrib[VERT_ATTRIB_FOG]; - } + /* plug our rastpos stage into the draw module */ + draw_set_rasterize_stage(st->draw, st->rastpos_stage); - if (outputMapping[VERT_RESULT_TEX0] != ~0) { - tex0 = buf; - buf += 4; - } - else { - tex0 = ctx->Current.Attrib[VERT_ATTRIB_TEX0]; - } + /* make sure everything's up to date */ + st_validate_state(ctx->st); - update_rasterpos(ctx, pos, color0, color1, fog, tex0); - } + /* This will get set only if rastpos_point(), above, gets called */ + ctx->Current.RasterPosValid = GL_FALSE; - /* free vertex feedback buffer */ - pipe->winsys->buffer_unmap(pipe->winsys, fb_buf.buffer); - pipe->winsys->buffer_reference(pipe->winsys, &fb_buf.buffer, NULL); + /* All vertex attribs but position were previously initialized above. + * Just plug in position pointer now. + */ + rs->array[0].Ptr = (GLubyte *) v; - /* restore pipe state */ - if (pipe->set_feedback_state) - pipe->set_feedback_state(pipe, &st->state.feedback); + /* draw the point */ + st_feedback_draw_vbo(ctx, rs->arrays, &rs->prim, 1, NULL, 0, 1); } + void st_init_rasterpos_functions(struct dd_function_table *functions) { functions->RasterPos = st_RasterPos; diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h index 82e133911f3..a6045230a0f 100644 --- a/src/mesa/state_tracker/st_context.h +++ b/src/mesa/state_tracker/st_context.h @@ -68,9 +68,10 @@ struct st_context struct pipe_context *pipe; - struct draw_context *draw; /**< For selection/feedback */ + struct draw_context *draw; /**< For selection/feedback/rastpos only */ struct draw_stage *feedback_stage; /**< For GL_FEEDBACK rendermode */ struct draw_stage *selection_stage; /**< For GL_SELECT rendermode */ + struct draw_stage *rastpos_stage; /**< For glRasterPos */ /* Some state is contained in constant objects. * Other state is just parameter values. |