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cogl: Use the colours of COGL_DEBUG=rectangles to debug batching

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Instead of assigning a new colour to each quad of a batch, the
rectangle debugging code now assigns a new colour to each batch so
that it can be used to visually see what is being batched. The colour
is stored in a global variable that is reset during cogl_clear. This
improves the chances that the same colour will be used for a batch in
the next frames to avoid flickering.
This commit is contained in:
Neil Roberts 2010-01-22 18:14:57 +00:00
parent 1718b1d42e
commit 47df6724b2
3 changed files with 54 additions and 17 deletions
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6
cogl/cogl-context.h
View File

@ -111,6 +111,12 @@ typedef struct
CoglHandle texture_download_material;
/* This debugging variable is used to pick a colour for visually
displaying the quad batches. It needs to be global so that it can
be reset by cogl_clear. It needs to be reset to increase the
chances of getting the same colour during an animation */
guint8 journal_rectangles_color;
CoglContextDriver drv;
} CoglContext;

54
cogl/cogl-journal.c
View File

@ -225,30 +225,51 @@ _cogl_journal_flush_modelview_and_entries (CoglJournalEntry *batch_start,
}
#endif
/* DEBUGGING CODE XXX:
* This path will cause all rectangles to be drawn with a red, green
* or blue outline with no blending. This may e.g. help with debugging
* texture slicing issues or blending issues, plus it looks quite cool.
/* DEBUGGING CODE XXX: This path will cause all rectangles to be
* drawn with a coloured outline. Each batch will be rendered with
* the same color. This may e.g. help with debugging texture slicing
* issues, visually seeing what is batched and debugging blending
* issues, plus it looks quite cool.
*/
if (cogl_debug_flags & COGL_DEBUG_RECTANGLES)
{
static CoglHandle outline = COGL_INVALID_HANDLE;
static int color = 0;
guint8 color_intensity;
int i;
_COGL_GET_CONTEXT (ctxt, NO_RETVAL);
if (outline == COGL_INVALID_HANDLE)
outline = cogl_material_new ();
/* The least significant three bits represent the three
components so that the order of colours goes red, green,
yellow, blue, magenta, cyan. Black and white are skipped. The
next two bits give four scales of intensity for those colours
in the order 0xff, 0xcc, 0x99, and 0x66. This gives a total
of 24 colours. If there are more than 24 batches on the stage
then it will wrap around */
color_intensity = 0xff - 0x33 * (ctxt->journal_rectangles_color >> 3);
cogl_material_set_color4ub (outline,
(ctxt->journal_rectangles_color & 1) ?
color_intensity : 0,
(ctxt->journal_rectangles_color & 2) ?
color_intensity : 0,
(ctxt->journal_rectangles_color & 4) ?
color_intensity : 0,
0xff);
_cogl_material_flush_gl_state (outline, NULL);
cogl_enable (COGL_ENABLE_VERTEX_ARRAY);
for (i = 0; i < batch_len; i++, color = (color + 1) % 3)
{
cogl_material_set_color4ub (outline,
color == 0 ? 0xff : 0x00,
color == 1 ? 0xff : 0x00,
color == 2 ? 0xff : 0x00,
0xff);
_cogl_material_flush_gl_state (outline, NULL);
GE( glDrawArrays (GL_LINE_LOOP, 4 * i, 4) );
}
for (i = 0; i < batch_len; i++)
GE( glDrawArrays (GL_LINE_LOOP, 4 * i + state->vertex_offset, 4) );
/* Go to the next color */
do
ctxt->journal_rectangles_color = ((ctxt->journal_rectangles_color + 1) &
((1 << 5) - 1));
/* We don't want to use black or white */
while ((ctxt->journal_rectangles_color & 0x07) == 0
|| (ctxt->journal_rectangles_color & 0x07) == 0x07);
}
state->vertex_offset += (4 * batch_len);
@ -779,8 +800,7 @@ _cogl_journal_log_quad (float x_1,
if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_DISABLE_SOFTWARE_TRANSFORM))
cogl_get_modelview_matrix (&entry->model_view);
if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_DISABLE_BATCHING
|| cogl_debug_flags & COGL_DEBUG_RECTANGLES))
if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_DISABLE_BATCHING))
_cogl_journal_flush ();
COGL_TIMER_STOP (_cogl_uprof_context, log_timer);

11
cogl/cogl.c
View File

@ -40,6 +40,7 @@
#include "cogl-winsys.h"
#include "cogl-framebuffer-private.h"
#include "cogl-matrix-private.h"
#include "cogl-journal-private.h"
#if defined (HAVE_COGL_GLES2) || defined (HAVE_COGL_GLES)
#include "cogl-gles2-wrapper.h"
@ -155,6 +156,16 @@ cogl_clear (const CoglColor *color, gulong buffers)
glClear (gl_buffers);
/* This is a debugging variable used to visually display the quad
batches from the journal. It is reset here to increase the
chances of getting the same colours for each frame during an
animation */
if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_RECTANGLES))
{
_COGL_GET_CONTEXT (ctxt, NO_RETVAL);
ctxt->journal_rectangles_color = 1;
}
COGL_NOTE (DRAW, "Clear end");
}