mirror of
https://github.com/brl/mutter.git
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journal: port to the vertex_attributes API
Instead of using raw OpenGL in the journal we now use the vertex attributes API instead. This is part of an ongoing effort to reduce the number of drawing paths we maintain in Cogl.
This commit is contained in:
Robert Bragg
parent
afb8a64bc4
commit
37657a5dd8
@ -141,6 +141,8 @@ cogl_create_context (void)
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_context->journal = g_array_new (FALSE, FALSE, sizeof (CoglJournalEntry));
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_context->logged_vertices = g_array_new (FALSE, FALSE, sizeof (GLfloat));
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_context->journal_flush_attributes_array =
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g_array_new (TRUE, FALSE, sizeof (CoglVertexAttribute *));
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_context->current_material = NULL;
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_context->current_material_changes_since_flush = 0;
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@ -280,6 +282,8 @@ _cogl_destroy_context (void)
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g_array_free (_context->journal, TRUE);
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if (_context->logged_vertices)
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g_array_free (_context->logged_vertices, TRUE);
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if (_context->journal_flush_attributes_array)
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g_array_free (_context->journal_flush_attributes_array, TRUE);
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if (_context->quad_buffer_indices_byte)
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cogl_handle_unref (_context->quad_buffer_indices_byte);
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@ -101,6 +101,7 @@ typedef struct
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GArray *journal;
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GArray *logged_vertices;
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GArray *polygon_vertices;
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GArray *journal_flush_attributes_array;
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/* Some simple caching, to minimize state changes... */
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CoglMaterial *current_material;
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@ -36,28 +36,12 @@
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#include "cogl-vertex-buffer-private.h"
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#include "cogl-framebuffer-private.h"
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#include "cogl-profile.h"
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#include "cogl-vertex-attribute-private.h"
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#include <string.h>
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#include <gmodule.h>
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#include <math.h>
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#define _COGL_MAX_BEZ_RECURSE_DEPTH 16
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#ifdef HAVE_COGL_GL
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#define glGenBuffers ctx->drv.pf_glGenBuffers
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#define glBindBuffer ctx->drv.pf_glBindBuffer
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#define glBufferData ctx->drv.pf_glBufferData
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#define glBufferSubData ctx->drv.pf_glBufferSubData
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#define glDeleteBuffers ctx->drv.pf_glDeleteBuffers
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#define glClientActiveTexture ctx->drv.pf_glClientActiveTexture
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#elif defined (HAVE_COGL_GLES2)
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#include "../gles/cogl-gles2-wrapper.h"
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#endif
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/* XXX NB:
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* Our journal's vertex data is arranged as follows:
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* 4 vertices per quad:
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@ -86,21 +70,22 @@
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(POS_STRIDE + COLOR_STRIDE + \
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TEX_STRIDE * (N_LAYERS < MIN_LAYER_PADING ? MIN_LAYER_PADING : N_LAYERS))
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typedef CoglVertexBufferIndices CoglJournalIndices;
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typedef struct _CoglJournalFlushState
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{
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gsize stride;
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/* Note: this is a pointer to handle fallbacks. It normally holds a VBO
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* offset, but when the driver doesn't support VBOs then this points into
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* our GArray of logged vertices. */
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char * vbo_offset;
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GLuint vertex_offset;
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CoglVertexArray *vertex_array;
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GArray *attributes;
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int current_attribute;
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gsize stride;
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size_t array_offset;
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GLuint current_vertex;
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#ifndef HAVE_COGL_GL
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CoglJournalIndices *indices;
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gsize indices_type_size;
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CoglIndices *indices;
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gsize indices_type_size;
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#endif
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CoglMatrixStack *modelview_stack;
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CoglMatrixStack *modelview_stack;
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CoglMaterial *source;
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} CoglJournalFlushState;
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typedef void (*CoglJournalBatchCallback) (CoglJournalEntry *start,
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@ -196,12 +181,15 @@ _cogl_journal_flush_modelview_and_entries (CoglJournalEntry *batch_start,
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int batch_len,
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void *data)
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{
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CoglJournalFlushState *state = data;
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CoglVertexAttribute **attributes;
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COGL_STATIC_TIMER (time_flush_modelview_and_entries,
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"flush: material+entries", /* parent */
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"flush: modelview+entries",
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"The time spent flushing modelview + entries",
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0 /* no application private data */);
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CoglJournalFlushState *state = data;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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COGL_TIMER_START (_cogl_uprof_context, time_flush_modelview_and_entries);
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@ -216,25 +204,30 @@ _cogl_journal_flush_modelview_and_entries (CoglJournalEntry *batch_start,
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COGL_MATRIX_MODELVIEW);
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}
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attributes = (CoglVertexAttribute **)state->attributes->data;
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cogl_push_source (state->source);
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#ifdef HAVE_COGL_GL
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GE (glDrawArrays (GL_QUADS, state->vertex_offset, batch_len * 4));
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/* XXX: it's rather evil that we sneak in the GL_QUADS enum here... */
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_cogl_draw_vertex_attributes_array (GL_QUADS,
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state->current_vertex, batch_len * 4,
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attributes);
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#else /* HAVE_COGL_GL */
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if (batch_len > 1)
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{
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int indices_offset = (state->vertex_offset / 4) * 6;
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GE (glDrawElements (GL_TRIANGLES,
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6 * batch_len,
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state->indices->type,
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(GLvoid*)(indices_offset * state->indices_type_size)));
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_cogl_draw_indexed_vertex_attributes_array (COGL_VERTICES_MODE_TRIANGLES,
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state->current_vertex * 6 / 4,
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batch_len * 6,
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state->indices,
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attributes);
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}
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else
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{
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GE (glDrawArrays (GL_TRIANGLE_FAN,
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state->vertex_offset, /* first */
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4)); /* n vertices */
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_cogl_draw_vertex_attributes_array (COGL_VERTICES_MODE_TRIANGLE_FAN,
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state->current_vertex, 4,
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attributes);
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}
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#endif
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@ -249,6 +242,7 @@ _cogl_journal_flush_modelview_and_entries (CoglJournalEntry *batch_start,
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static CoglHandle outline = COGL_INVALID_HANDLE;
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guint8 color_intensity;
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int i;
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CoglVertexAttribute *loop_attributes[2];
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_COGL_GET_CONTEXT (ctxt, NO_RETVAL);
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@ -271,10 +265,14 @@ _cogl_journal_flush_modelview_and_entries (CoglJournalEntry *batch_start,
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(ctxt->journal_rectangles_color & 4) ?
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color_intensity : 0,
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0xff);
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_cogl_material_flush_gl_state (outline, FALSE);
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_cogl_enable (COGL_ENABLE_VERTEX_ARRAY);
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cogl_set_source (outline);
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loop_attributes[0] = attributes[0]; /* we just want the position */
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loop_attributes[1] = NULL;
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for (i = 0; i < batch_len; i++)
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GE( glDrawArrays (GL_LINE_LOOP, 4 * i + state->vertex_offset, 4) );
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_cogl_draw_vertex_attributes_array (COGL_VERTICES_MODE_LINE_LOOP,
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4 * i + state->current_vertex, 4,
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loop_attributes);
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/* Go to the next color */
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do
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@ -285,7 +283,9 @@ _cogl_journal_flush_modelview_and_entries (CoglJournalEntry *batch_start,
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|| (ctxt->journal_rectangles_color & 0x07) == 0x07);
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}
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state->vertex_offset += (4 * batch_len);
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state->current_vertex += (4 * batch_len);
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cogl_pop_source ();
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COGL_TIMER_STOP (_cogl_uprof_context, time_flush_modelview_and_entries);
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}
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@ -319,7 +319,7 @@ _cogl_journal_flush_material_and_entries (CoglJournalEntry *batch_start,
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int batch_len,
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void *data)
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{
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unsigned long enable_flags = 0;
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CoglJournalFlushState *state = data;
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COGL_STATIC_TIMER (time_flush_material_entries,
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"flush: texcoords+material+entries", /* parent */
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"flush: material+entries",
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@ -333,15 +333,7 @@ _cogl_journal_flush_material_and_entries (CoglJournalEntry *batch_start,
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if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_BATCHING))
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g_print ("BATCHING: material batch len = %d\n", batch_len);
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_cogl_material_flush_gl_state (batch_start->material, TRUE);
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if (ctx->enable_backface_culling)
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enable_flags |= COGL_ENABLE_BACKFACE_CULLING;
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enable_flags |= COGL_ENABLE_VERTEX_ARRAY;
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enable_flags |= COGL_ENABLE_COLOR_ARRAY;
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_cogl_enable (enable_flags);
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_cogl_flush_face_winding ();
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state->source = batch_start->material;
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/* If we haven't transformed the quads in software then we need to also break
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* up batches according to changes in the modelview matrix... */
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@ -398,28 +390,57 @@ _cogl_journal_flush_texcoord_vbo_offsets_and_entries (
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COGL_TIMER_START (_cogl_uprof_context, time_flush_texcoord_material_entries);
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/* NB: attributes 0 and 1 are position and color */
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for (i = 2; i < state->attributes->len; i++)
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cogl_object_unref (g_array_index (state->attributes,
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CoglVertexAttribute *, i));
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g_array_set_size (state->attributes, batch_start->n_layers + 2);
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for (i = 0; i < batch_start->n_layers; i++)
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{
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GE (glClientActiveTexture (GL_TEXTURE0 + i));
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GE (glEnableClientState (GL_TEXTURE_COORD_ARRAY));
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CoglVertexAttribute **attribute_entry =
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&g_array_index (state->attributes, CoglVertexAttribute *, i + 2);
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const char *names[] = {
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"cogl_tex_coord0_in",
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"cogl_tex_coord1_in",
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"cogl_tex_coord2_in",
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"cogl_tex_coord3_in",
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"cogl_tex_coord4_in",
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"cogl_tex_coord5_in",
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"cogl_tex_coord6_in",
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"cogl_tex_coord7_in"
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};
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char *name;
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/* XXX NB:
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* Our journal's vertex data is arranged as follows:
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* 4 vertices per quad:
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* 2 or 3 GLfloats per position (3 when doing software transforms)
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* 4 RGBA GLubytes,
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* 2 GLfloats per tex coord * n_layers
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* 2 or 3 floats per position (3 when doing software transforms)
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* 4 RGBA bytes,
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* 2 floats per tex coord * n_layers
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* (though n_layers may be padded; see definition of
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* GET_JOURNAL_VB_STRIDE_FOR_N_LAYERS for details)
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*/
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GE (glTexCoordPointer (2, GL_FLOAT, state->stride,
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(void *)(state->vbo_offset +
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(POS_STRIDE + COLOR_STRIDE) * 4 +
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TEX_STRIDE * 4 * i)));
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}
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name = i < 8 ? (char *)names[i] :
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g_strdup_printf ("cogl_tex_coord%d_in", i);
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_cogl_bitmask_clear_all (&ctx->temp_bitmask);
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_cogl_bitmask_set_range (&ctx->temp_bitmask, batch_start->n_layers, TRUE);
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_cogl_disable_other_texcoord_arrays (&ctx->temp_bitmask);
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/* XXX: it may be worth having some form of static initializer for
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* attributes... */
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*attribute_entry =
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cogl_vertex_attribute_new (state->vertex_array,
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name,
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state->stride,
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state->array_offset +
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(POS_STRIDE + COLOR_STRIDE) * 4 +
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TEX_STRIDE * 4 * i,
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2,
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COGL_VERTEX_ATTRIBUTE_TYPE_FLOAT);
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if (i >= 8)
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g_free (name);
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}
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batch_and_call (batch_start,
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batch_len,
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@ -446,12 +467,9 @@ _cogl_journal_flush_vbo_offsets_and_entries (CoglJournalEntry *batch_start,
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void *data)
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{
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CoglJournalFlushState *state = data;
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gsize stride;
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#ifndef HAVE_COGL_GL
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int needed_indices = batch_len * 6;
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CoglHandle indices_handle;
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CoglVertexBufferIndices *indices;
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#endif
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gsize stride;
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int i;
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CoglVertexAttribute **attribute_entry;
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COGL_STATIC_TIMER (time_flush_vbo_texcoord_material_entries,
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"Journal Flush", /* parent */
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"flush: vbo+texcoords+material+entries",
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@ -477,35 +495,45 @@ _cogl_journal_flush_vbo_offsets_and_entries (CoglJournalEntry *batch_start,
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* GET_JOURNAL_VB_STRIDE_FOR_N_LAYERS for details)
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*/
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stride = GET_JOURNAL_VB_STRIDE_FOR_N_LAYERS (batch_start->n_layers);
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stride *= sizeof (GLfloat);
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stride *= sizeof (float);
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state->stride = stride;
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GE (glVertexPointer (N_POS_COMPONENTS, GL_FLOAT, stride,
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(void *)state->vbo_offset));
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GE (glColorPointer (4, GL_UNSIGNED_BYTE, stride,
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(void *)(state->vbo_offset + (POS_STRIDE * 4))));
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for (i = 0; i < state->attributes->len; i++)
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cogl_object_unref (g_array_index (state->attributes,
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CoglVertexAttribute *, i));
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g_array_set_size (state->attributes, 2);
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attribute_entry =
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&g_array_index (state->attributes, CoglVertexAttribute *, 0);
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*attribute_entry =
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cogl_vertex_attribute_new (state->vertex_array,
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"cogl_position_in",
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stride,
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state->array_offset,
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N_POS_COMPONENTS,
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COGL_VERTEX_ATTRIBUTE_TYPE_FLOAT);
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attribute_entry =
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&g_array_index (state->attributes, CoglVertexAttribute *, 1);
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*attribute_entry =
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cogl_vertex_attribute_new (state->vertex_array,
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"cogl_color_in",
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stride,
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state->array_offset + (POS_STRIDE * 4),
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4,
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COGL_VERTEX_ATTRIBUTE_TYPE_UNSIGNED_BYTE);
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#ifndef HAVE_COGL_GL
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indices_handle = cogl_vertex_buffer_indices_get_for_quads (needed_indices);
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indices = _cogl_vertex_buffer_indices_pointer_from_handle (indices_handle);
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state->indices = indices;
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if (indices->type == GL_UNSIGNED_BYTE)
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state->indices_type_size = 1;
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else if (indices->type == GL_UNSIGNED_SHORT)
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state->indices_type_size = 2;
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else
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g_critical ("unknown indices type %d", indices->type);
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GE (glBindBuffer (GL_ELEMENT_ARRAY_BUFFER,
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GPOINTER_TO_UINT (indices->vbo_name)));
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state->indices = cogl_get_rectangle_indices (batch_len);
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#endif
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/* We only call gl{Vertex,Color,Texture}Pointer when the stride within
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* the VBO changes. (due to a change in the number of material layers)
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/* We only create new VertexAttributes when the stride within the
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* VertexArray changes. (due to a change in the number of material layers)
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* While the stride remains constant we walk forward through the above
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* VBO using a vertex offset passed to glDraw{Arrays,Elements} */
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state->vertex_offset = 0;
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* VertexArray using a vertex offset passed to cogl_draw_vertex_attributes
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*/
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state->current_vertex = 0;
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if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_JOURNAL))
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{
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@ -513,9 +541,9 @@ _cogl_journal_flush_vbo_offsets_and_entries (CoglJournalEntry *batch_start,
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if (cogl_get_features () & COGL_FEATURE_VBOS)
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verts = ((guint8 *)ctx->logged_vertices->data) +
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(size_t)state->vbo_offset;
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(size_t)state->array_offset;
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else
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verts = (guint8 *)state->vbo_offset;
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verts = (guint8 *)state->array_offset;
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_cogl_journal_dump_quad_batch (verts,
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batch_start->n_layers,
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batch_len);
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@ -528,9 +556,9 @@ _cogl_journal_flush_vbo_offsets_and_entries (CoglJournalEntry *batch_start,
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data);
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/* progress forward through the VBO containing all our vertices */
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state->vbo_offset += (stride * 4 * batch_len);
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state->array_offset += (stride * 4 * batch_len);
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if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_JOURNAL))
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g_print ("new vbo offset = %lu\n", (unsigned long)state->vbo_offset);
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g_print ("new vbo offset = %lu\n", (unsigned long)state->array_offset);
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COGL_TIMER_STOP (_cogl_uprof_context,
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time_flush_vbo_texcoord_material_entries);
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@ -552,29 +580,28 @@ compare_entry_strides (CoglJournalEntry *entry0, CoglJournalEntry *entry1)
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return FALSE;
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}
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static GLuint
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upload_vertices_to_vbo (GArray *vertices, CoglJournalFlushState *state)
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static CoglVertexArray *
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upload_vertices (GArray *vertices, CoglJournalFlushState *state)
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{
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gsize needed_vbo_len;
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GLuint journal_vbo;
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CoglVertexArray *array;
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CoglBuffer *buffer;
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_COGL_GET_CONTEXT (ctx, 0);
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needed_vbo_len = vertices->len * sizeof (GLfloat);
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needed_vbo_len = vertices->len * sizeof (float);
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g_assert (needed_vbo_len);
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GE (glGenBuffers (1, &journal_vbo));
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GE (glBindBuffer (GL_ARRAY_BUFFER, journal_vbo));
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GE (glBufferData (GL_ARRAY_BUFFER,
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needed_vbo_len,
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vertices->data,
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GL_STATIC_DRAW));
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array = cogl_vertex_array_new (needed_vbo_len);
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buffer = COGL_BUFFER (array);
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cogl_buffer_set_update_hint (buffer, COGL_BUFFER_UPDATE_HINT_STATIC);
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cogl_buffer_set_data (buffer, 0, (guint8 *)vertices->data, needed_vbo_len);
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/* As we flush the journal entries in batches we walk forward through the
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||||
* above VBO starting at offset 0... */
|
||||
state->vbo_offset = NULL;
|
||||
state->array_offset = 0;
|
||||
|
||||
return journal_vbo;
|
||||
return array;
|
||||
}
|
||||
|
||||
/* XXX NB: When _cogl_journal_flush() returns all state relating
|
||||
@ -586,9 +613,6 @@ _cogl_journal_flush (void)
|
||||
{
|
||||
CoglJournalFlushState state;
|
||||
int i;
|
||||
GLuint journal_vbo;
|
||||
gboolean vbo_fallback =
|
||||
(cogl_get_features () & COGL_FEATURE_VBOS) ? FALSE : TRUE;
|
||||
CoglFramebuffer *framebuffer;
|
||||
CoglMatrixStack *modelview_stack;
|
||||
COGL_STATIC_TIMER (flush_timer,
|
||||
@ -607,12 +631,9 @@ _cogl_journal_flush (void)
|
||||
if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_BATCHING))
|
||||
g_print ("BATCHING: journal len = %d\n", ctx->journal->len);
|
||||
|
||||
/* Load all the vertex data we have accumulated so far into a single VBO
|
||||
* to minimize memory management costs within the GL driver. */
|
||||
if (!vbo_fallback)
|
||||
journal_vbo = upload_vertices_to_vbo (ctx->logged_vertices, &state);
|
||||
else
|
||||
state.vbo_offset = (char *)ctx->logged_vertices->data;
|
||||
state.vertex_array = upload_vertices (ctx->logged_vertices, &state);
|
||||
state.attributes = ctx->journal_flush_attributes_array;
|
||||
g_array_set_size (ctx->journal_flush_attributes_array, 0);
|
||||
|
||||
framebuffer = _cogl_get_framebuffer ();
|
||||
modelview_stack = _cogl_framebuffer_get_modelview_stack (framebuffer);
|
||||
@ -666,9 +687,6 @@ _cogl_journal_flush (void)
|
||||
_cogl_material_journal_unref (entry->material);
|
||||
}
|
||||
|
||||
if (!vbo_fallback)
|
||||
GE (glDeleteBuffers (1, &journal_vbo));
|
||||
|
||||
g_array_set_size (ctx->journal, 0);
|
||||
g_array_set_size (ctx->logged_vertices, 0);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user