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Diffstat (limited to 'src/gallium/drivers/i915simple/i915_prim_vbuf.c')
-rw-r--r--src/gallium/drivers/i915simple/i915_prim_vbuf.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/src/gallium/drivers/i915simple/i915_prim_vbuf.c b/src/gallium/drivers/i915simple/i915_prim_vbuf.c
new file mode 100644
index 0000000000..e069773fd4
--- /dev/null
+++ b/src/gallium/drivers/i915simple/i915_prim_vbuf.c
@@ -0,0 +1,254 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+/**
+ * \file
+ * Build post-transformation, post-clipping vertex buffers and element
+ * lists by hooking into the end of the primitive pipeline and
+ * manipulating the vertex_id field in the vertex headers.
+ *
+ * XXX: work in progress
+ *
+ * \author José Fonseca <jrfonseca@tungstengraphics.com>
+ * \author Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+#include "pipe/draw/draw_vbuf.h"
+#include "pipe/p_debug.h"
+#include "pipe/p_util.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_winsys.h"
+
+#include "i915_context.h"
+#include "i915_reg.h"
+#include "i915_winsys.h"
+#include "i915_batch.h"
+#include "i915_state.h"
+
+
+/**
+ * Primitive renderer for i915.
+ */
+struct i915_vbuf_render {
+ struct vbuf_render base;
+
+ struct i915_context *i915;
+
+ /** Vertex size in bytes */
+ unsigned vertex_size;
+
+ /** Hardware primitive */
+ unsigned hwprim;
+};
+
+
+/**
+ * Basically a cast wrapper.
+ */
+static INLINE struct i915_vbuf_render *
+i915_vbuf_render( struct vbuf_render *render )
+{
+ assert(render);
+ return (struct i915_vbuf_render *)render;
+}
+
+
+static const struct vertex_info *
+i915_vbuf_render_get_vertex_info( struct vbuf_render *render )
+{
+ struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
+ struct i915_context *i915 = i915_render->i915;
+ return &i915->current.vertex_info;
+}
+
+
+static void *
+i915_vbuf_render_allocate_vertices( struct vbuf_render *render,
+ ushort vertex_size,
+ ushort nr_vertices )
+{
+ struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
+ struct i915_context *i915 = i915_render->i915;
+ struct pipe_winsys *winsys = i915->pipe.winsys;
+ size_t size = (size_t)vertex_size * (size_t)nr_vertices;
+
+ /* FIXME: handle failure */
+ assert(!i915->vbo);
+ i915->vbo = winsys->buffer_create(winsys, 64, I915_BUFFER_USAGE_LIT_VERTEX,
+ size);
+
+ i915->dirty |= I915_NEW_VBO;
+
+ return winsys->buffer_map(winsys,
+ i915->vbo,
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+}
+
+
+static void
+i915_vbuf_render_set_primitive( struct vbuf_render *render,
+ unsigned prim )
+{
+ struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
+
+ switch(prim) {
+ case PIPE_PRIM_POINTS:
+ i915_render->hwprim = PRIM3D_POINTLIST;
+ break;
+ case PIPE_PRIM_LINES:
+ i915_render->hwprim = PRIM3D_LINELIST;
+ break;
+ case PIPE_PRIM_TRIANGLES:
+ i915_render->hwprim = PRIM3D_TRILIST;
+ break;
+ default:
+ assert(0);
+ }
+}
+
+
+static void
+i915_vbuf_render_draw( struct vbuf_render *render,
+ const ushort *indices,
+ uint nr_indices)
+{
+ struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
+ struct i915_context *i915 = i915_render->i915;
+ unsigned i;
+
+ assert(nr_indices);
+
+ assert((i915->dirty & ~I915_NEW_VBO) == 0);
+
+ if (i915->dirty)
+ i915_update_derived( i915 );
+
+ if (i915->hardware_dirty)
+ i915_emit_hardware_state( i915 );
+
+ if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
+ FLUSH_BATCH();
+
+ /* Make sure state is re-emitted after a flush:
+ */
+ i915_update_derived( i915 );
+ i915_emit_hardware_state( i915 );
+
+ if (!BEGIN_BATCH( 1 + (nr_indices + 1)/2, 1 )) {
+ assert(0);
+ return;
+ }
+ }
+
+ OUT_BATCH( _3DPRIMITIVE |
+ PRIM_INDIRECT |
+ i915_render->hwprim |
+ PRIM_INDIRECT_ELTS |
+ nr_indices );
+ for (i = 0; i + 1 < nr_indices; i += 2) {
+ OUT_BATCH( indices[i] |
+ (indices[i + 1] << 16) );
+ }
+ if (i < nr_indices) {
+ OUT_BATCH( indices[i] );
+ }
+}
+
+
+static void
+i915_vbuf_render_release_vertices( struct vbuf_render *render,
+ void *vertices,
+ unsigned vertex_size,
+ unsigned vertices_used )
+{
+ struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
+ struct i915_context *i915 = i915_render->i915;
+ struct pipe_winsys *winsys = i915->pipe.winsys;
+
+ assert(i915->vbo);
+ winsys->buffer_unmap(winsys, i915->vbo);
+ pipe_buffer_reference(winsys, &i915->vbo, NULL);
+}
+
+
+static void
+i915_vbuf_render_destroy( struct vbuf_render *render )
+{
+ struct i915_vbuf_render *i915_render = i915_vbuf_render(render);
+ FREE(i915_render);
+}
+
+
+/**
+ * Create a new primitive render.
+ */
+static struct vbuf_render *
+i915_vbuf_render_create( struct i915_context *i915 )
+{
+ struct i915_vbuf_render *i915_render = CALLOC_STRUCT(i915_vbuf_render);
+
+ i915_render->i915 = i915;
+
+ i915_render->base.max_vertex_buffer_bytes = 128*1024;
+
+ /* NOTE: it must be such that state and vertices indices fit in a single
+ * batch buffer.
+ */
+ i915_render->base.max_indices = 16*1024;
+
+ i915_render->base.get_vertex_info = i915_vbuf_render_get_vertex_info;
+ i915_render->base.allocate_vertices = i915_vbuf_render_allocate_vertices;
+ i915_render->base.set_primitive = i915_vbuf_render_set_primitive;
+ i915_render->base.draw = i915_vbuf_render_draw;
+ i915_render->base.release_vertices = i915_vbuf_render_release_vertices;
+ i915_render->base.destroy = i915_vbuf_render_destroy;
+
+ return &i915_render->base;
+}
+
+
+/**
+ * Create a new primitive vbuf/render stage.
+ */
+struct draw_stage *i915_draw_vbuf_stage( struct i915_context *i915 )
+{
+ struct vbuf_render *render;
+ struct draw_stage *stage;
+
+ render = i915_vbuf_render_create(i915);
+ if(!render)
+ return NULL;
+
+ stage = draw_vbuf_stage( i915->draw, render );
+ if(!stage) {
+ render->destroy(render);
+ return NULL;
+ }
+
+ return stage;
+}
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