| /************************************************************************** |
| * |
| * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /* |
| * Authors: |
| * Keith Whitwell <keith@tungstengraphics.com> |
| */ |
| |
| |
| #include "util/u_memory.h" |
| #include "util/u_math.h" |
| #include "draw_context.h" |
| #include "draw_vbuf.h" |
| #include "draw_vs.h" |
| #include "draw_pt.h" |
| #include "draw_pipe.h" |
| |
| |
| struct draw_context *draw_create( void ) |
| { |
| struct draw_context *draw = CALLOC_STRUCT( draw_context ); |
| if (draw == NULL) |
| goto fail; |
| |
| ASSIGN_4V( draw->plane[0], -1, 0, 0, 1 ); |
| ASSIGN_4V( draw->plane[1], 1, 0, 0, 1 ); |
| ASSIGN_4V( draw->plane[2], 0, -1, 0, 1 ); |
| ASSIGN_4V( draw->plane[3], 0, 1, 0, 1 ); |
| ASSIGN_4V( draw->plane[4], 0, 0, 1, 1 ); /* yes these are correct */ |
| ASSIGN_4V( draw->plane[5], 0, 0, -1, 1 ); /* mesa's a bit wonky */ |
| draw->nr_planes = 6; |
| |
| |
| draw->reduced_prim = ~0; /* != any of PIPE_PRIM_x */ |
| |
| |
| if (!draw_pipeline_init( draw )) |
| goto fail; |
| |
| if (!draw_pt_init( draw )) |
| goto fail; |
| |
| if (!draw_vs_init( draw )) |
| goto fail; |
| |
| return draw; |
| |
| fail: |
| draw_destroy( draw ); |
| return NULL; |
| } |
| |
| |
| void draw_destroy( struct draw_context *draw ) |
| { |
| if (!draw) |
| return; |
| |
| |
| |
| /* Not so fast -- we're just borrowing this at the moment. |
| * |
| if (draw->render) |
| draw->render->destroy( draw->render ); |
| */ |
| |
| draw_pipeline_destroy( draw ); |
| draw_pt_destroy( draw ); |
| draw_vs_destroy( draw ); |
| |
| FREE( draw ); |
| } |
| |
| |
| |
| void draw_flush( struct draw_context *draw ) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_BACKEND ); |
| } |
| |
| |
| /** |
| * Specify the Minimum Resolvable Depth factor for polygon offset. |
| * This factor potentially depends on the number of Z buffer bits, |
| * the rasterization algorithm and the arithmetic performed on Z |
| * values between vertex shading and rasterization. It will vary |
| * from one driver to another. |
| */ |
| void draw_set_mrd(struct draw_context *draw, double mrd) |
| { |
| draw->mrd = mrd; |
| } |
| |
| |
| /** |
| * Register new primitive rasterization/rendering state. |
| * This causes the drawing pipeline to be rebuilt. |
| */ |
| void draw_set_rasterizer_state( struct draw_context *draw, |
| const struct pipe_rasterizer_state *raster ) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| |
| draw->rasterizer = raster; |
| draw->bypass_clipping = |
| ((draw->rasterizer && draw->rasterizer->bypass_vs_clip_and_viewport) || |
| draw->driver.bypass_clipping); |
| } |
| |
| |
| void draw_set_driver_clipping( struct draw_context *draw, |
| boolean bypass_clipping ) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| |
| draw->driver.bypass_clipping = bypass_clipping; |
| draw->bypass_clipping = |
| ((draw->rasterizer && draw->rasterizer->bypass_vs_clip_and_viewport) || |
| draw->driver.bypass_clipping); |
| } |
| |
| |
| /** |
| * Plug in the primitive rendering/rasterization stage (which is the last |
| * stage in the drawing pipeline). |
| * This is provided by the device driver. |
| */ |
| void draw_set_rasterize_stage( struct draw_context *draw, |
| struct draw_stage *stage ) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| |
| draw->pipeline.rasterize = stage; |
| } |
| |
| |
| /** |
| * Set the draw module's clipping state. |
| */ |
| void draw_set_clip_state( struct draw_context *draw, |
| const struct pipe_clip_state *clip ) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| |
| assert(clip->nr <= PIPE_MAX_CLIP_PLANES); |
| memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0])); |
| draw->nr_planes = 6 + clip->nr; |
| } |
| |
| |
| /** |
| * Set the draw module's viewport state. |
| */ |
| void draw_set_viewport_state( struct draw_context *draw, |
| const struct pipe_viewport_state *viewport ) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| draw->viewport = *viewport; /* struct copy */ |
| draw->identity_viewport = (viewport->scale[0] == 1.0f && |
| viewport->scale[1] == 1.0f && |
| viewport->scale[2] == 1.0f && |
| viewport->scale[3] == 1.0f && |
| viewport->translate[0] == 0.0f && |
| viewport->translate[1] == 0.0f && |
| viewport->translate[2] == 0.0f && |
| viewport->translate[3] == 0.0f); |
| |
| draw_vs_set_viewport( draw, viewport ); |
| } |
| |
| |
| |
| void |
| draw_set_vertex_buffers(struct draw_context *draw, |
| unsigned count, |
| const struct pipe_vertex_buffer *buffers) |
| { |
| assert(count <= PIPE_MAX_ATTRIBS); |
| |
| memcpy(draw->pt.vertex_buffer, buffers, count * sizeof(buffers[0])); |
| draw->pt.nr_vertex_buffers = count; |
| } |
| |
| |
| void |
| draw_set_vertex_elements(struct draw_context *draw, |
| unsigned count, |
| const struct pipe_vertex_element *elements) |
| { |
| assert(count <= PIPE_MAX_ATTRIBS); |
| |
| memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0])); |
| draw->pt.nr_vertex_elements = count; |
| } |
| |
| |
| /** |
| * Tell drawing context where to find mapped vertex buffers. |
| */ |
| void |
| draw_set_mapped_vertex_buffer(struct draw_context *draw, |
| unsigned attr, const void *buffer) |
| { |
| draw->pt.user.vbuffer[attr] = buffer; |
| } |
| |
| |
| void |
| draw_set_mapped_constant_buffer(struct draw_context *draw, |
| const void *buffer, |
| unsigned size ) |
| { |
| draw->pt.user.constants = buffer; |
| draw_vs_set_constants( draw, (const float (*)[4])buffer, size ); |
| } |
| |
| |
| /** |
| * Tells the draw module to draw points with triangles if their size |
| * is greater than this threshold. |
| */ |
| void |
| draw_wide_point_threshold(struct draw_context *draw, float threshold) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| draw->pipeline.wide_point_threshold = threshold; |
| } |
| |
| |
| /** |
| * Tells the draw module to draw lines with triangles if their width |
| * is greater than this threshold. |
| */ |
| void |
| draw_wide_line_threshold(struct draw_context *draw, float threshold) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| draw->pipeline.wide_line_threshold = threshold; |
| } |
| |
| |
| /** |
| * Tells the draw module whether or not to implement line stipple. |
| */ |
| void |
| draw_enable_line_stipple(struct draw_context *draw, boolean enable) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| draw->pipeline.line_stipple = enable; |
| } |
| |
| |
| /** |
| * Tells draw module whether to convert points to quads for sprite mode. |
| */ |
| void |
| draw_enable_point_sprites(struct draw_context *draw, boolean enable) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| draw->pipeline.point_sprite = enable; |
| } |
| |
| |
| void |
| draw_set_force_passthrough( struct draw_context *draw, boolean enable ) |
| { |
| draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); |
| draw->force_passthrough = enable; |
| } |
| |
| |
| /** |
| * Ask the draw module for the location/slot of the given vertex attribute in |
| * a post-transformed vertex. |
| * |
| * With this function, drivers that use the draw module should have no reason |
| * to track the current vertex shader. |
| * |
| * Note that the draw module may sometimes generate vertices with extra |
| * attributes (such as texcoords for AA lines). The driver can call this |
| * function to find those attributes. |
| * |
| * Zero is returned if the attribute is not found since this is |
| * a don't care / undefined situtation. Returning -1 would be a bit more |
| * work for the drivers. |
| */ |
| int |
| draw_find_vs_output(const struct draw_context *draw, |
| uint semantic_name, uint semantic_index) |
| { |
| const struct draw_vertex_shader *vs = draw->vs.vertex_shader; |
| uint i; |
| for (i = 0; i < vs->info.num_outputs; i++) { |
| if (vs->info.output_semantic_name[i] == semantic_name && |
| vs->info.output_semantic_index[i] == semantic_index) |
| return i; |
| } |
| |
| /* XXX there may be more than one extra vertex attrib. |
| * For example, simulated gl_FragCoord and gl_PointCoord. |
| */ |
| if (draw->extra_vp_outputs.semantic_name == semantic_name && |
| draw->extra_vp_outputs.semantic_index == semantic_index) { |
| return draw->extra_vp_outputs.slot; |
| } |
| return 0; |
| } |
| |
| |
| /** |
| * Return number of vertex shader outputs. |
| */ |
| uint |
| draw_num_vs_outputs(const struct draw_context *draw) |
| { |
| uint count = draw->vs.vertex_shader->info.num_outputs; |
| if (draw->extra_vp_outputs.slot > 0) |
| count++; |
| return count; |
| } |
| |
| |
| /** |
| * Provide TGSI sampler objects for vertex shaders that use texture fetches. |
| * This might only be used by software drivers for the time being. |
| */ |
| void |
| draw_texture_samplers(struct draw_context *draw, |
| uint num_samplers, |
| struct tgsi_sampler **samplers) |
| { |
| draw->vs.num_samplers = num_samplers; |
| draw->vs.samplers = samplers; |
| } |
| |
| |
| |
| |
| void draw_set_render( struct draw_context *draw, |
| struct vbuf_render *render ) |
| { |
| draw->render = render; |
| } |
| |
| void draw_set_edgeflags( struct draw_context *draw, |
| const unsigned *edgeflag ) |
| { |
| draw->pt.user.edgeflag = edgeflag; |
| } |
| |
| |
| |
| |
| /** |
| * Tell the drawing context about the index/element buffer to use |
| * (ala glDrawElements) |
| * If no element buffer is to be used (i.e. glDrawArrays) then this |
| * should be called with eltSize=0 and elements=NULL. |
| * |
| * \param draw the drawing context |
| * \param eltSize size of each element (1, 2 or 4 bytes) |
| * \param elements the element buffer ptr |
| */ |
| void |
| draw_set_mapped_element_buffer_range( struct draw_context *draw, |
| unsigned eltSize, |
| unsigned min_index, |
| unsigned max_index, |
| const void *elements ) |
| { |
| draw->pt.user.elts = elements; |
| draw->pt.user.eltSize = eltSize; |
| draw->pt.user.min_index = min_index; |
| draw->pt.user.max_index = max_index; |
| } |
| |
| |
| void |
| draw_set_mapped_element_buffer( struct draw_context *draw, |
| unsigned eltSize, |
| const void *elements ) |
| { |
| draw->pt.user.elts = elements; |
| draw->pt.user.eltSize = eltSize; |
| draw->pt.user.min_index = 0; |
| draw->pt.user.max_index = 0xffffffff; |
| } |
| |
| |
| /* Revamp me please: |
| */ |
| void draw_do_flush( struct draw_context *draw, unsigned flags ) |
| { |
| if (!draw->suspend_flushing) |
| { |
| assert(!draw->flushing); /* catch inadvertant recursion */ |
| |
| draw->flushing = TRUE; |
| |
| draw_pipeline_flush( draw, flags ); |
| |
| draw->reduced_prim = ~0; /* is reduced_prim needed any more? */ |
| |
| draw->flushing = FALSE; |
| } |
| } |