/*
* Mesa 3-D graphics library
- * Version: 6.3
*
* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
*
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
- * Keith Whitwell <keith@tungstengraphics.com>
+ * Keith Whitwell <keithw@vmware.com>
*/
-#include "main/api_arrayelt.h"
#include "main/glheader.h"
+#include "main/arrayobj.h"
#include "main/mtypes.h"
+#include "main/api_arrayelt.h"
#include "main/vtxfmt.h"
-#include "vbo_context.h"
+#include "vbo_private.h"
+const GLubyte
+_vbo_attribute_alias_map[VP_MODE_MAX][VERT_ATTRIB_MAX] = {
+ /* VP_MODE_FF: */
+ {
+ VBO_ATTRIB_POS, /* VERT_ATTRIB_POS */
+ VBO_ATTRIB_NORMAL, /* VERT_ATTRIB_NORMAL */
+ VBO_ATTRIB_COLOR0, /* VERT_ATTRIB_COLOR0 */
+ VBO_ATTRIB_COLOR1, /* VERT_ATTRIB_COLOR1 */
+ VBO_ATTRIB_FOG, /* VERT_ATTRIB_FOG */
+ VBO_ATTRIB_COLOR_INDEX, /* VERT_ATTRIB_COLOR_INDEX */
+ VBO_ATTRIB_EDGEFLAG, /* VERT_ATTRIB_EDGEFLAG */
+ VBO_ATTRIB_TEX0, /* VERT_ATTRIB_TEX0 */
+ VBO_ATTRIB_TEX1, /* VERT_ATTRIB_TEX1 */
+ VBO_ATTRIB_TEX2, /* VERT_ATTRIB_TEX2 */
+ VBO_ATTRIB_TEX3, /* VERT_ATTRIB_TEX3 */
+ VBO_ATTRIB_TEX4, /* VERT_ATTRIB_TEX4 */
+ VBO_ATTRIB_TEX5, /* VERT_ATTRIB_TEX5 */
+ VBO_ATTRIB_TEX6, /* VERT_ATTRIB_TEX6 */
+ VBO_ATTRIB_TEX7, /* VERT_ATTRIB_TEX7 */
+ VBO_ATTRIB_POINT_SIZE, /* VERT_ATTRIB_POINT_SIZE */
+ VBO_ATTRIB_GENERIC0, /* VERT_ATTRIB_GENERIC0 */
+ VBO_ATTRIB_GENERIC1, /* VERT_ATTRIB_GENERIC1 */
+ VBO_ATTRIB_GENERIC2, /* VERT_ATTRIB_GENERIC2 */
+ VBO_ATTRIB_GENERIC3, /* VERT_ATTRIB_GENERIC3 */
+ VBO_ATTRIB_MAT_FRONT_AMBIENT, /* VERT_ATTRIB_GENERIC4 */
+ VBO_ATTRIB_MAT_BACK_AMBIENT, /* VERT_ATTRIB_GENERIC5 */
+ VBO_ATTRIB_MAT_FRONT_DIFFUSE, /* VERT_ATTRIB_GENERIC6 */
+ VBO_ATTRIB_MAT_BACK_DIFFUSE, /* VERT_ATTRIB_GENERIC7 */
+ VBO_ATTRIB_MAT_FRONT_SPECULAR, /* VERT_ATTRIB_GENERIC8 */
+ VBO_ATTRIB_MAT_BACK_SPECULAR, /* VERT_ATTRIB_GENERIC9 */
+ VBO_ATTRIB_MAT_FRONT_EMISSION, /* VERT_ATTRIB_GENERIC10 */
+ VBO_ATTRIB_MAT_BACK_EMISSION, /* VERT_ATTRIB_GENERIC11 */
+ VBO_ATTRIB_MAT_FRONT_SHININESS, /* VERT_ATTRIB_GENERIC12 */
+ VBO_ATTRIB_MAT_BACK_SHININESS, /* VERT_ATTRIB_GENERIC13 */
+ VBO_ATTRIB_MAT_FRONT_INDEXES, /* VERT_ATTRIB_GENERIC14 */
+ VBO_ATTRIB_MAT_BACK_INDEXES /* VERT_ATTRIB_GENERIC15 */
+ },
+
+ /* VP_MODE_SHADER: */
+ {
+ VBO_ATTRIB_POS, /* VERT_ATTRIB_POS */
+ VBO_ATTRIB_NORMAL, /* VERT_ATTRIB_NORMAL */
+ VBO_ATTRIB_COLOR0, /* VERT_ATTRIB_COLOR0 */
+ VBO_ATTRIB_COLOR1, /* VERT_ATTRIB_COLOR1 */
+ VBO_ATTRIB_FOG, /* VERT_ATTRIB_FOG */
+ VBO_ATTRIB_COLOR_INDEX, /* VERT_ATTRIB_COLOR_INDEX */
+ VBO_ATTRIB_EDGEFLAG, /* VERT_ATTRIB_EDGEFLAG */
+ VBO_ATTRIB_TEX0, /* VERT_ATTRIB_TEX0 */
+ VBO_ATTRIB_TEX1, /* VERT_ATTRIB_TEX1 */
+ VBO_ATTRIB_TEX2, /* VERT_ATTRIB_TEX2 */
+ VBO_ATTRIB_TEX3, /* VERT_ATTRIB_TEX3 */
+ VBO_ATTRIB_TEX4, /* VERT_ATTRIB_TEX4 */
+ VBO_ATTRIB_TEX5, /* VERT_ATTRIB_TEX5 */
+ VBO_ATTRIB_TEX6, /* VERT_ATTRIB_TEX6 */
+ VBO_ATTRIB_TEX7, /* VERT_ATTRIB_TEX7 */
+ VBO_ATTRIB_POINT_SIZE, /* VERT_ATTRIB_POINT_SIZE */
+ VBO_ATTRIB_GENERIC0, /* VERT_ATTRIB_GENERIC0 */
+ VBO_ATTRIB_GENERIC1, /* VERT_ATTRIB_GENERIC1 */
+ VBO_ATTRIB_GENERIC2, /* VERT_ATTRIB_GENERIC2 */
+ VBO_ATTRIB_GENERIC3, /* VERT_ATTRIB_GENERIC3 */
+ VBO_ATTRIB_GENERIC4, /* VERT_ATTRIB_GENERIC4 */
+ VBO_ATTRIB_GENERIC5, /* VERT_ATTRIB_GENERIC5 */
+ VBO_ATTRIB_GENERIC6, /* VERT_ATTRIB_GENERIC6 */
+ VBO_ATTRIB_GENERIC7, /* VERT_ATTRIB_GENERIC7 */
+ VBO_ATTRIB_GENERIC8, /* VERT_ATTRIB_GENERIC8 */
+ VBO_ATTRIB_GENERIC9, /* VERT_ATTRIB_GENERIC9 */
+ VBO_ATTRIB_GENERIC10, /* VERT_ATTRIB_GENERIC10 */
+ VBO_ATTRIB_GENERIC11, /* VERT_ATTRIB_GENERIC11 */
+ VBO_ATTRIB_GENERIC12, /* VERT_ATTRIB_GENERIC12 */
+ VBO_ATTRIB_GENERIC13, /* VERT_ATTRIB_GENERIC13 */
+ VBO_ATTRIB_GENERIC14, /* VERT_ATTRIB_GENERIC14 */
+ VBO_ATTRIB_GENERIC15 /* VERT_ATTRIB_GENERIC15 */
+ }
+};
-void vbo_exec_init( struct gl_context *ctx )
+void
+vbo_exec_init(struct gl_context *ctx)
{
struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
exec->ctx = ctx;
- /* Initialize the arrayelt helper
- */
- if (!ctx->aelt_context &&
- !_ae_create_context( ctx ))
- return;
+ /* aelt_context should have been created by the caller */
+ assert(ctx->aelt_context);
- vbo_exec_vtx_init( exec );
+ vbo_exec_vtx_init(exec);
ctx->Driver.NeedFlush = 0;
ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
- ctx->Driver.BeginVertices = vbo_exec_BeginVertices;
- ctx->Driver.FlushVertices = vbo_exec_FlushVertices;
- vbo_exec_invalidate_state( ctx, ~0 );
+ /* The aelt_context state should still be dirty from its creation */
+ assert(_ae_is_state_dirty(ctx));
+
+ exec->array.recalculate_inputs = GL_TRUE;
+ exec->eval.recalculate_maps = GL_TRUE;
}
/**
- * Really want to install these callbacks to a central facility to be
- * invoked according to the state flags. That will have to wait for a
- * mesa rework:
- */
-void vbo_exec_invalidate_state( struct gl_context *ctx, GLuint new_state )
+ * In some degenarate cases we can improve our ability to merge
+ * consecutive primitives. For example:
+ * glBegin(GL_LINE_STRIP);
+ * glVertex(1);
+ * glVertex(1);
+ * glEnd();
+ * glBegin(GL_LINE_STRIP);
+ * glVertex(1);
+ * glVertex(1);
+ * glEnd();
+ * Can be merged as a GL_LINES prim with four vertices.
+ *
+ * This function converts 2-vertex line strips/loops into GL_LINES, etc.
+ */
+void
+vbo_try_prim_conversion(struct _mesa_prim *p)
{
- struct vbo_context *vbo = vbo_context(ctx);
- struct vbo_exec_context *exec = &vbo->exec;
-
- if (!exec->validating && new_state & (_NEW_PROGRAM|_NEW_ARRAY)) {
- exec->array.recalculate_inputs = GL_TRUE;
-
- /* If we ended up here because a VAO was deleted, the _DrawArrays
- * pointer which pointed to the VAO might be invalid now, so set it
- * to NULL. This prevents crashes in driver functions like Clear
- * where driver state validation might occur, but the vbo module is
- * still in an invalid state.
- *
- * Drivers should skip vertex array state validation if _DrawArrays
- * is NULL. It also has no effect on performance, because attrib
- * bindings will be recalculated anyway.
- */
- if (vbo->last_draw_method == DRAW_ARRAYS) {
- ctx->Array._DrawArrays = NULL;
- vbo->last_draw_method = DRAW_NONE;
- }
+ if (p->mode == GL_LINE_STRIP && p->count == 2) {
+ /* convert 2-vertex line strip to a separate line */
+ p->mode = GL_LINES;
+ }
+ else if ((p->mode == GL_TRIANGLE_STRIP || p->mode == GL_TRIANGLE_FAN)
+ && p->count == 3) {
+ /* convert 3-vertex tri strip or fan to a separate triangle */
+ p->mode = GL_TRIANGLES;
}
- if (new_state & _NEW_EVAL)
- exec->eval.recalculate_maps = 1;
+ /* Note: we can't convert a 4-vertex quad strip to a separate quad
+ * because the vertex ordering is different. We'd have to muck
+ * around in the vertex data to make it work.
+ */
+}
+
- _ae_invalidate_state(ctx, new_state);
+/**
+ * Helper function for determining if two subsequent glBegin/glEnd
+ * primitives can be combined. This is only possible for GL_POINTS,
+ * GL_LINES, GL_TRIANGLES and GL_QUADS.
+ * If we return true, it means that we can concatenate p1 onto p0 (and
+ * discard p1).
+ */
+bool
+vbo_can_merge_prims(const struct _mesa_prim *p0, const struct _mesa_prim *p1)
+{
+ if (!p0->begin ||
+ !p1->begin ||
+ !p0->end ||
+ !p1->end)
+ return false;
+
+ /* The prim mode must match (ex: both GL_TRIANGLES) */
+ if (p0->mode != p1->mode)
+ return false;
+
+ /* p1's vertices must come right after p0 */
+ if (p0->start + p0->count != p1->start)
+ return false;
+
+ if (p0->basevertex != p1->basevertex ||
+ p0->num_instances != p1->num_instances ||
+ p0->base_instance != p1->base_instance)
+ return false;
+
+ /* can always merge subsequent GL_POINTS primitives */
+ if (p0->mode == GL_POINTS)
+ return true;
+
+ /* independent lines with no extra vertices */
+ if (p0->mode == GL_LINES && p0->count % 2 == 0 && p1->count % 2 == 0)
+ return true;
+
+ /* independent tris */
+ if (p0->mode == GL_TRIANGLES && p0->count % 3 == 0 && p1->count % 3 == 0)
+ return true;
+
+ /* independent quads */
+ if (p0->mode == GL_QUADS && p0->count % 4 == 0 && p1->count % 4 == 0)
+ return true;
+
+ return false;
}
/**
- * Figure out the number of transform feedback primitives that will be output
- * considering the drawing mode, number of vertices, and instance count,
- * assuming that no geometry shading is done and primitive restart is not
- * used.
- *
- * This is used by driver back-ends in implementing the PRIMITIVES_GENERATED
- * and TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN queries. It is also used to
- * pre-validate draw calls in GLES3 (where draw calls only succeed if there is
- * enough room in the transform feedback buffer for the result).
+ * If we've determined that p0 and p1 can be merged, this function
+ * concatenates p1 onto p0.
*/
-size_t
-vbo_count_tessellated_primitives(GLenum mode, GLuint count,
- GLuint num_instances)
+void
+vbo_merge_prims(struct _mesa_prim *p0, const struct _mesa_prim *p1)
{
- size_t num_primitives;
- switch (mode) {
- case GL_POINTS:
- num_primitives = count;
- break;
- case GL_LINE_STRIP:
- num_primitives = count >= 2 ? count - 1 : 0;
- break;
- case GL_LINE_LOOP:
- num_primitives = count >= 2 ? count : 0;
- break;
- case GL_LINES:
- num_primitives = count / 2;
- break;
- case GL_TRIANGLE_STRIP:
- case GL_TRIANGLE_FAN:
- case GL_POLYGON:
- num_primitives = count >= 3 ? count - 2 : 0;
- break;
- case GL_TRIANGLES:
- num_primitives = count / 3;
- break;
- case GL_QUAD_STRIP:
- num_primitives = count >= 4 ? ((count / 2) - 1) * 2 : 0;
- break;
- case GL_QUADS:
- num_primitives = (count / 4) * 2;
- break;
- default:
- assert(!"Unexpected primitive type in count_tessellated_primitives");
- num_primitives = 0;
- break;
+ assert(vbo_can_merge_prims(p0, p1));
+
+ p0->count += p1->count;
+ p0->end = p1->end;
+}
+
+
+void
+_vbo_set_recalculate_inputs(struct gl_context *ctx)
+{
+ vbo_context(ctx)->exec.array.recalculate_inputs = GL_TRUE;
+}
+
+
+void
+_vbo_init_inputs(struct vbo_inputs *inputs)
+{
+ inputs->current = 0;
+ inputs->vertex_processing_mode = VP_MODE_FF;
+}
+
+
+/**
+ * Update the vbo_inputs's arrays to point to the vao->_VertexArray arrays
+ * according to the 'enable' bitmask.
+ * \param enable bitfield of VERT_BIT_x flags.
+ */
+static inline void
+update_vao_inputs(struct gl_context *ctx,
+ struct vbo_inputs *inputs, GLbitfield enable)
+{
+ const struct gl_vertex_array_object *vao = ctx->Array._DrawVAO;
+
+ /* Make sure we process only arrays enabled in the VAO */
+ assert((enable & ~_mesa_get_vao_vp_inputs(vao)) == 0);
+
+ /* Fill in the client arrays from the VAO */
+ const GLubyte *const map = _mesa_vao_attribute_map[vao->_AttributeMapMode];
+ const struct gl_array_attributes *attribs = &vao->VertexAttrib[0];
+ const struct gl_vertex_buffer_binding *bindings = &vao->BufferBinding[0];
+ while (enable) {
+ const int attr = u_bit_scan(&enable);
+ struct gl_vertex_array *input = &inputs->inputs[attr];
+ const struct gl_array_attributes *attrib = &attribs[map[attr]];
+ input->VertexAttrib = attrib;
+ input->BufferBinding = &bindings[attrib->BufferBindingIndex];
+ }
+}
+
+
+/**
+ * Update the vbo_inputs's arrays to point to the vbo->currval arrays
+ * according to the 'current' bitmask.
+ * \param current bitfield of VERT_BIT_x flags.
+ */
+static inline void
+update_current_inputs(struct gl_context *ctx,
+ struct vbo_inputs *inputs, GLbitfield current)
+{
+ gl_vertex_processing_mode mode = ctx->VertexProgram._VPMode;
+
+ /* All previously non current array pointers need update. */
+ GLbitfield mask = current & ~inputs->current;
+ /* On mode change, the slots aliasing with materials need update too */
+ if (mode != inputs->vertex_processing_mode)
+ mask |= current & VERT_BIT_MAT_ALL;
+
+ struct vbo_context *vbo = vbo_context(ctx);
+ const struct gl_array_attributes *const currval = &vbo->current[0];
+ const GLubyte *const map = _vbo_attribute_alias_map[mode];
+ while (mask) {
+ const int attr = u_bit_scan(&mask);
+ struct gl_vertex_array *input = &inputs->inputs[attr];
+ input->VertexAttrib = &currval[map[attr]];
+ input->BufferBinding = &vbo->binding;
}
- return num_primitives * num_instances;
+
+ inputs->current = current;
+ inputs->vertex_processing_mode = mode;
+}
+
+
+/**
+ * Update the vbo_inputs's arrays to point to the vao->_VertexArray and
+ * vbo->currval arrays according to Array._DrawVAO and
+ * Array._DrawVAOEnableAttribs.
+ */
+void
+_vbo_update_inputs(struct gl_context *ctx, struct vbo_inputs *inputs)
+{
+ const GLbitfield enable = ctx->Array._DrawVAOEnabledAttribs;
+
+ /* Update array input pointers */
+ update_vao_inputs(ctx, inputs, enable);
+
+ /* The rest must be current inputs. */
+ update_current_inputs(ctx, inputs, ~enable & VERT_BIT_ALL);
}
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