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path: root/src/gallium/auxiliary/draw/draw_context.c
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Diffstat (limited to 'src/gallium/auxiliary/draw/draw_context.c')
-rw-r--r--src/gallium/auxiliary/draw/draw_context.c394
1 files changed, 394 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_context.c b/src/gallium/auxiliary/draw/draw_context.c
new file mode 100644
index 0000000000..36751c2621
--- /dev/null
+++ b/src/gallium/auxiliary/draw/draw_context.c
@@ -0,0 +1,394 @@
+/**************************************************************************
+ *
+ * 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 );
+}
+
+
+
+/**
+ * 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_clipping) ||
+ 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->bypass_clipping ||
+ 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;
+}
+
+
+/**
+ * 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;
+}
+
+
+
+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,
+ 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,
+ 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;
+ }
+}
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