void
_cogl_path_fill_nodes (CoglPath *path, CoglDrawFlags flags)
{
gboolean needs_fallback = FALSE;
CoglPipeline *pipeline = cogl_get_source ();
_cogl_pipeline_foreach_layer_internal (pipeline,
validate_layer_cb, &needs_fallback);
if (needs_fallback)
{
_cogl_path_fill_nodes_with_clipped_rectangle (path);
return;
}
_cogl_path_build_fill_attribute_buffer (path);
_cogl_framebuffer_draw_indexed_attributes (cogl_get_draw_framebuffer (),
pipeline,
COGL_VERTICES_MODE_TRIANGLES,
0, /* first_vertex */
path->data->fill_vbo_n_indices,
path->data->fill_vbo_indices,
path->data->fill_attributes,
COGL_PATH_N_ATTRIBUTES,
flags);
}
void
cogl_begin_gl (void)
{
CoglPipeline *pipeline;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (ctx->in_begin_gl_block)
{
static CoglBool shown = FALSE;
if (!shown)
g_warning ("You should not nest cogl_begin_gl/cogl_end_gl blocks");
shown = TRUE;
return;
}
ctx->in_begin_gl_block = TRUE;
/* Flush all batched primitives */
cogl_flush ();
/* Flush framebuffer state, including clip state, modelview and
* projection matrix state
*
* NB: _cogl_framebuffer_flush_state may disrupt various state (such
* as the pipeline state) when flushing the clip stack, so should
* always be done first when preparing to draw. */
_cogl_framebuffer_flush_state (cogl_get_draw_framebuffer (),
_cogl_get_read_framebuffer (),
COGL_FRAMEBUFFER_STATE_ALL);
/* Setup the state for the current pipeline */
/* We considered flushing a specific, minimal pipeline here to try and
* simplify the GL state, but decided to avoid special cases and second
* guessing what would be actually helpful.
*
* A user should instead call cogl_set_source_color4ub() before
* cogl_begin_gl() to simplify the state flushed.
*
* XXX: note defining n_tex_coord_attribs using
* cogl_pipeline_get_n_layers is a hack, but the problem is that
* n_tex_coord_attribs is usually defined when drawing a primitive
* which isn't happening here.
*
* Maybe it would be more useful if this code did flush the
* opaque_color_pipeline and then call into cogl-pipeline-opengl.c to then
* restore all state for the material's backend back to default OpenGL
* values.
*/
pipeline = cogl_get_source ();
_cogl_pipeline_flush_gl_state (ctx,
pipeline,
cogl_get_draw_framebuffer (),
FALSE,
FALSE);
/* Disable any cached vertex arrays */
_cogl_gl_disable_all_attributes (ctx);
}
/* TODO: Update to the protoype used in the Cogl master branch.
* This is experimental API but not in sync with the cogl_path_fill()
* api in Cogl master which takes explicit framebuffer and pipeline
* arguments */
void
cogl2_path_fill (CoglPath *path)
{
_COGL_RETURN_IF_FAIL (cogl_is_path (path));
_cogl_path_fill_nodes (path,
cogl_get_draw_framebuffer (),
cogl_get_source (),
0 /* flags */);
}
static void
_cogl_rectangles_with_multitexture_coords (
CoglMultiTexturedRect *rects,
int n_rects)
{
_cogl_framebuffer_draw_multitextured_rectangles (cogl_get_draw_framebuffer (),
cogl_get_source (),
rects,
n_rects,
FALSE);
}
/* TODO: Update to the protoype used in the Cogl master branch.
* This is experimental API but not in sync with the cogl_path_fill()
* api in Cogl master which takes explicit framebuffer and pipeline
* arguments */
void
cogl2_path_stroke (CoglPath *path)
{
_COGL_RETURN_IF_FAIL (cogl_is_path (path));
if (path->data->path_nodes->len == 0)
return;
_cogl_path_stroke_nodes (path,
cogl_get_draw_framebuffer (),
cogl_get_source ());
}
static void
_cogl_path_stroke_nodes (CoglPath *path)
{
CoglPathData *data = path->data;
CoglPipeline *copy = NULL;
CoglPipeline *source;
unsigned int path_start;
int path_num = 0;
CoglPathNode *node;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
source = cogl_get_source ();
if (cogl_pipeline_get_n_layers (source) != 0)
{
copy = cogl_pipeline_copy (source);
_cogl_pipeline_prune_to_n_layers (copy, 0);
source = copy;
}
_cogl_path_build_stroke_attribute_buffer (path);
cogl_push_source (source);
for (path_start = 0;
path_start < data->path_nodes->len;
path_start += node->path_size)
{
node = &g_array_index (data->path_nodes, CoglPathNode, path_start);
cogl_framebuffer_vdraw_attributes (cogl_get_draw_framebuffer (),
source,
COGL_VERTICES_MODE_LINE_STRIP,
0, node->path_size,
data->stroke_attributes[path_num],
NULL);
path_num++;
}
cogl_pop_source ();
if (copy)
cogl_object_unref (copy);
}
void
cogl_polygon (const CoglTextureVertex *vertices,
unsigned int n_vertices,
CoglBool use_color)
{
CoglPipeline *pipeline;
ValidateState validate_state;
int n_layers;
int n_attributes;
CoglAttribute **attributes;
int i;
unsigned int stride;
size_t stride_bytes;
CoglAttributeBuffer *attribute_buffer;
float *v;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
pipeline = cogl_get_source ();
validate_state.original_pipeline = pipeline;
validate_state.pipeline = pipeline;
cogl_pipeline_foreach_layer (pipeline,
_cogl_polygon_validate_layer_cb,
&validate_state);
pipeline = validate_state.pipeline;
n_layers = cogl_pipeline_get_n_layers (pipeline);
n_attributes = 1 + n_layers + (use_color ? 1 : 0);
attributes = g_alloca (sizeof (CoglAttribute *) * n_attributes);
/* Our data is arranged like:
* [X, Y, Z, TX0, TY0, TX1, TY1..., R, G, B, A,...] */
stride = 3 + (2 * n_layers) + (use_color ? 1 : 0);
stride_bytes = stride * sizeof (float);
/* Make sure there is enough space in the global vertex array. This
* is used so we can render the polygon with a single call to OpenGL
* but still support any number of vertices */
g_array_set_size (ctx->polygon_vertices, n_vertices * stride);
attribute_buffer =
cogl_attribute_buffer_new (ctx, n_vertices * stride_bytes, NULL);
attributes[0] = cogl_attribute_new (attribute_buffer,
"cogl_position_in",
stride_bytes,
0,
3,
COGL_ATTRIBUTE_TYPE_FLOAT);
for (i = 0; i < n_layers; i++)
{
static const char *names[] = {
"cogl_tex_coord0_in",
"cogl_tex_coord1_in",
"cogl_tex_coord2_in",
"cogl_tex_coord3_in",
"cogl_tex_coord4_in",
"cogl_tex_coord5_in",
"cogl_tex_coord6_in",
"cogl_tex_coord7_in"
};
char *allocated_name = NULL;
const char *name;
if (i < 8)
name = names[i];
else
name = allocated_name = g_strdup_printf ("cogl_tex_coord%d_in", i);
attributes[i + 1] = cogl_attribute_new (attribute_buffer,
name,
stride_bytes,
/* NB: [X,Y,Z,TX,TY...,R,G,B,A,...] */
12 + 8 * i,
2,
COGL_ATTRIBUTE_TYPE_FLOAT);
g_free (allocated_name);
}
if (use_color)
{
attributes[n_attributes - 1] =
cogl_attribute_new (attribute_buffer,
"cogl_color_in",
stride_bytes,
/* NB: [X,Y,Z,TX,TY...,R,G,B,A,...] */
12 + 8 * n_layers,
4,
COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE);
}
/* Convert the vertices into an array of float vertex attributes */
v = (float *)ctx->polygon_vertices->data;
for (i = 0; i < n_vertices; i++)
{
AppendTexCoordsState append_tex_coords_state;
uint8_t *c;
/* NB: [X,Y,Z,TX,TY...,R,G,B,A,...] */
v[0] = vertices[i].x;
v[1] = vertices[i].y;
v[2] = vertices[i].z;
append_tex_coords_state.vertices_in = vertices;
append_tex_coords_state.vertex = i;
append_tex_coords_state.layer = 0;
append_tex_coords_state.vertices_out = v;
cogl_pipeline_foreach_layer (pipeline,
append_tex_coord_attributes_cb,
&append_tex_coords_state);
if (use_color)
{
/* NB: [X,Y,Z,TX,TY...,R,G,B,A,...] */
c = (uint8_t *) (v + 3 + 2 * n_layers);
c[0] = cogl_color_get_red_byte (&vertices[i].color);
c[1] = cogl_color_get_green_byte (&vertices[i].color);
c[2] = cogl_color_get_blue_byte (&vertices[i].color);
c[3] = cogl_color_get_alpha_byte (&vertices[i].color);
}
v += stride;
}
v = (float *)ctx->polygon_vertices->data;
cogl_buffer_set_data (COGL_BUFFER (attribute_buffer),
0,
v,
ctx->polygon_vertices->len * sizeof (float));
/* XXX: although this may seem redundant, we need to do this since
* cogl_polygon() can be used with legacy state and its the source stack
* which track whether legacy state is enabled.
*
* (We only have a CoglDrawFlag to disable legacy state not one
* to enable it) */
cogl_push_source (pipeline);
_cogl_framebuffer_draw_attributes (cogl_get_draw_framebuffer (),
pipeline,
COGL_VERTICES_MODE_TRIANGLE_FAN,
0, n_vertices,
attributes,
n_attributes,
0 /* no draw flags */);
cogl_pop_source ();
if (pipeline != validate_state.original_pipeline)
cogl_object_unref (pipeline);
cogl_object_unref (attribute_buffer);
for (i = 0; i < n_attributes; i++)
cogl_object_unref (attributes[i]);
}
