/**
* crank_make_mesh_sphere_uv_p3:
* @cogl_context: A CoglContext.
* @uc: Number of vertices in u-direction.
* @vc: Number of vertices in v-direction. This excludes two vertices at bottom
* and top.
*
* Constructs a #CoglPrimivive for a sphere.
* This only contains a position information.
*
* Returns: (transfer full): A #CoglPrimitive for a sphere.
*/
CoglPrimitive*
crank_make_mesh_sphere_uv_p3 (CoglContext *cogl_context,
const guint uc,
const guint vc)
{
CoglPrimitive *primitive;
CoglIndices *indices;
CoglVertexP3 *vdata;
TriIndices *idata;
guint lvdata;
guint lidata;
vdata = crank_make_v_p3_sphere_uv (uc, vc, &lvdata);
idata = crank_make_indices_sphere_uv (uc, vc, &lidata);
indices = cogl_indices_new (cogl_context, COGL_INDICES_TYPE_UNSIGNED_SHORT,
idata, lidata * 3);
primitive = cogl_primitive_new_p3 (cogl_context,
COGL_VERTICES_MODE_TRIANGLES,
lvdata,
vdata);
cogl_primitive_set_indices (primitive, indices, lidata * 3);
cogl_object_unref (indices);
g_free (vdata);
g_free (idata);
return primitive;
}
CoglPrimitive *
cogl_primitive_copy (CoglPrimitive *primitive)
{
CoglPrimitive *copy;
copy = cogl_primitive_new_with_attributes (primitive->mode,
primitive->n_vertices,
primitive->attributes,
primitive->n_attributes);
cogl_primitive_set_indices (copy, primitive->indices, primitive->n_vertices);
cogl_primitive_set_first_vertex (copy, primitive->first_vertex);
return copy;
}
static CoglPrimitive *
_cogl_path_get_fill_primitive (CoglPath *path)
{
if (path->data->fill_primitive)
return path->data->fill_primitive;
_cogl_path_build_fill_attribute_buffer (path);
path->data->fill_primitive =
cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_TRIANGLES,
path->data->fill_vbo_n_indices,
path->data->fill_attributes,
COGL_PATH_N_ATTRIBUTES);
cogl_primitive_set_indices (path->data->fill_primitive,
path->data->fill_vbo_indices,
path->data->fill_vbo_n_indices);
return path->data->fill_primitive;
}
static void
emit_vertex_buffer_geometry (CoglFramebuffer *fb,
CoglPipeline *pipeline,
CoglPangoDisplayListNode *node)
{
CoglContext *ctx = fb->context;
/* It's expensive to go through the Cogl journal for large runs
* of text in part because the journal transforms the quads in software
* to avoid changing the modelview matrix. So for larger runs of text
* we load the vertices into a VBO, and this has the added advantage
* that if the text doesn't change from frame to frame the VBO can
* be re-used avoiding the repeated cost of validating the data and
* mapping it into the GPU... */
if (node->d.texture.primitive == NULL)
{
CoglAttributeBuffer *buffer;
CoglVertexP2T2 *verts, *v;
int n_verts;
CoglBool allocated = FALSE;
CoglAttribute *attributes[2];
CoglPrimitive *prim;
int i;
CoglError *ignore_error = NULL;
n_verts = node->d.texture.rectangles->len * 4;
buffer
= cogl_attribute_buffer_new_with_size (ctx,
n_verts *
sizeof (CoglVertexP2T2));
if ((verts = cogl_buffer_map (COGL_BUFFER (buffer),
COGL_BUFFER_ACCESS_WRITE,
COGL_BUFFER_MAP_HINT_DISCARD,
&ignore_error)) == NULL)
{
cogl_error_free (ignore_error);
verts = g_new (CoglVertexP2T2, n_verts);
allocated = TRUE;
}
v = verts;
/* Copy the rectangles into the buffer and expand into four
vertices instead of just two */
for (i = 0; i < node->d.texture.rectangles->len; i++)
{
const CoglPangoDisplayListRectangle *rectangle
= &g_array_index (node->d.texture.rectangles,
CoglPangoDisplayListRectangle, i);
v->x = rectangle->x_1;
v->y = rectangle->y_1;
v->s = rectangle->s_1;
v->t = rectangle->t_1;
v++;
v->x = rectangle->x_1;
v->y = rectangle->y_2;
v->s = rectangle->s_1;
v->t = rectangle->t_2;
v++;
v->x = rectangle->x_2;
v->y = rectangle->y_2;
v->s = rectangle->s_2;
v->t = rectangle->t_2;
v++;
v->x = rectangle->x_2;
v->y = rectangle->y_1;
v->s = rectangle->s_2;
v->t = rectangle->t_1;
v++;
}
if (allocated)
{
cogl_buffer_set_data (COGL_BUFFER (buffer),
0, /* offset */
verts,
sizeof (CoglVertexP2T2) * n_verts,
NULL);
g_free (verts);
}
else
cogl_buffer_unmap (COGL_BUFFER (buffer));
attributes[0] = cogl_attribute_new (buffer,
"cogl_position_in",
sizeof (CoglVertexP2T2),
G_STRUCT_OFFSET (CoglVertexP2T2, x),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
attributes[1] = cogl_attribute_new (buffer,
"cogl_tex_coord0_in",
sizeof (CoglVertexP2T2),
G_STRUCT_OFFSET (CoglVertexP2T2, s),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
prim = cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_TRIANGLES,
n_verts,
attributes,
2 /* n_attributes */);
#ifdef CLUTTER_COGL_HAS_GL
if (_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_QUADS))
cogl_primitive_set_mode (prim, GL_QUADS);
else
#endif
{
/* GLES doesn't support GL_QUADS so instead we use a VBO
with indexed vertices to generate GL_TRIANGLES from the
quads */
CoglIndices *indices =
cogl_get_rectangle_indices (ctx, node->d.texture.rectangles->len);
cogl_primitive_set_indices (prim, indices,
node->d.texture.rectangles->len * 6);
}
node->d.texture.primitive = prim;
cogl_object_unref (buffer);
cogl_object_unref (attributes[0]);
cogl_object_unref (attributes[1]);
}
cogl_primitive_draw (node->d.texture.primitive,
fb,
pipeline);
}
static void
clutter_deform_effect_init_arrays (ClutterDeformEffect *self)
{
ClutterDeformEffectPrivate *priv = self->priv;
gint x, y, direction, n_indices;
CoglAttribute *attributes[3];
guint16 *static_indices;
CoglContext *ctx =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
CoglIndices *indices;
guint16 *idx;
int i;
clutter_deform_effect_free_arrays (self);
n_indices = ((2 + 2 * priv->x_tiles)
* priv->y_tiles
+ (priv->y_tiles - 1));
static_indices = g_new (guint16, n_indices);
#define MESH_INDEX(x,y) ((y) * (priv->x_tiles + 1) + (x))
/* compute all the triangles from the various tiles */
direction = 1;
idx = static_indices;
idx[0] = MESH_INDEX (0, 0);
idx[1] = MESH_INDEX (0, 1);
idx += 2;
for (y = 0; y < priv->y_tiles; y++)
{
for (x = 0; x < priv->x_tiles; x++)
{
if (direction)
{
idx[0] = MESH_INDEX (x + 1, y);
idx[1] = MESH_INDEX (x + 1, y + 1);
}
else
{
idx[0] = MESH_INDEX (priv->x_tiles - x - 1, y);
idx[1] = MESH_INDEX (priv->x_tiles - x - 1, y + 1);
}
idx += 2;
}
if (y == (priv->y_tiles - 1))
break;
if (direction)
{
idx[0] = MESH_INDEX (priv->x_tiles, y + 1);
idx[1] = MESH_INDEX (priv->x_tiles, y + 1);
idx[2] = MESH_INDEX (priv->x_tiles, y + 2);
}
else
{
idx[0] = MESH_INDEX (0, y + 1);
idx[1] = MESH_INDEX (0, y + 1);
idx[2] = MESH_INDEX (0, y + 2);
}
idx += 3;
direction = !direction;
}
#undef MESH_INDEX
indices = cogl_indices_new (ctx,
COGL_INDICES_TYPE_UNSIGNED_SHORT,
static_indices,
n_indices);
g_free (static_indices);
priv->n_vertices = (priv->x_tiles + 1) * (priv->y_tiles + 1);
priv->buffer =
cogl_attribute_buffer_new (ctx,
sizeof (CoglVertexP3T2C4) *
priv->n_vertices,
NULL);
/* The application is expected to continuously modify the vertices
so we should give a hint to Cogl about that */
cogl_buffer_set_update_hint (COGL_BUFFER (priv->buffer),
COGL_BUFFER_UPDATE_HINT_DYNAMIC);
attributes[0] = cogl_attribute_new (priv->buffer,
"cogl_position_in",
sizeof (CoglVertexP3T2C4),
G_STRUCT_OFFSET (CoglVertexP3T2C4, x),
3, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
attributes[1] = cogl_attribute_new (priv->buffer,
"cogl_tex_coord0_in",
sizeof (CoglVertexP3T2C4),
G_STRUCT_OFFSET (CoglVertexP3T2C4, s),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
attributes[2] = cogl_attribute_new (priv->buffer,
"cogl_color_in",
sizeof (CoglVertexP3T2C4),
G_STRUCT_OFFSET (CoglVertexP3T2C4, r),
4, /* n_components */
COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE);
priv->primitive =
cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_TRIANGLE_STRIP,
priv->n_vertices,
attributes,
3 /* n_attributes */);
cogl_primitive_set_indices (priv->primitive,
indices,
n_indices);
if (G_UNLIKELY (clutter_paint_debug_flags & CLUTTER_DEBUG_PAINT_DEFORM_TILES))
{
priv->lines_primitive =
cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_LINE_STRIP,
priv->n_vertices,
attributes,
2 /* n_attributes */);
cogl_primitive_set_indices (priv->lines_primitive,
indices,
n_indices);
}
cogl_object_unref (indices);
for (i = 0; i < 3; i++)
cogl_object_unref (attributes[i]);
priv->is_dirty = TRUE;
}
int
main (int argc, char **argv)
{
CoglContext *ctx;
CoglOnscreen *onscreen;
CoglFramebuffer *fb;
GError *error = NULL;
Data data;
PangoRectangle hello_label_size;
float fovy, aspect, z_near, z_2d, z_far;
CoglDepthState depth_state;
CoglBool has_swap_notify;
ctx = cogl_context_new (NULL, &error);
if (!ctx) {
fprintf (stderr, "Failed to create context: %s\n", error->message);
return 1;
}
onscreen = cogl_onscreen_new (ctx, 640, 480);
fb = COGL_FRAMEBUFFER (onscreen);
data.fb = fb;
data.framebuffer_width = cogl_framebuffer_get_width (fb);
data.framebuffer_height = cogl_framebuffer_get_height (fb);
data.timer = g_timer_new ();
cogl_onscreen_show (onscreen);
cogl_framebuffer_set_viewport (fb,
0, 0,
data.framebuffer_width,
data.framebuffer_height);
fovy = 60; /* y-axis field of view */
aspect = (float)data.framebuffer_width/(float)data.framebuffer_height;
z_near = 0.1; /* distance to near clipping plane */
z_2d = 1000; /* position to 2d plane */
z_far = 2000; /* distance to far clipping plane */
cogl_framebuffer_perspective (fb, fovy, aspect, z_near, z_far);
/* Since the pango renderer emits geometry in pixel/device coordinates
* and the anti aliasing is implemented with the assumption that the
* geometry *really* does end up pixel aligned, we setup a modelview
* matrix so that for geometry in the plane z = 0 we exactly map x
* coordinates in the range [0,stage_width] and y coordinates in the
* range [0,stage_height] to the framebuffer extents with (0,0) being
* the top left.
*
* This is roughly what Clutter does for a ClutterStage, but this
* demonstrates how it is done manually using Cogl.
*/
cogl_matrix_init_identity (&data.view);
cogl_matrix_view_2d_in_perspective (&data.view, fovy, aspect, z_near, z_2d,
data.framebuffer_width,
data.framebuffer_height);
cogl_framebuffer_set_modelview_matrix (fb, &data.view);
/* Initialize some convenient constants */
cogl_matrix_init_identity (&identity);
cogl_color_set_from_4ub (&white, 0xff, 0xff, 0xff, 0xff);
/* rectangle indices allow the GPU to interpret a list of quads (the
* faces of our cube) as a list of triangles.
*
* Since this is a very common thing to do
* cogl_get_rectangle_indices() is a convenience function for
* accessing internal index buffers that can be shared.
*/
data.indices = cogl_get_rectangle_indices (ctx, 6 /* n_rectangles */);
data.prim = cogl_primitive_new_p3t2 (ctx, COGL_VERTICES_MODE_TRIANGLES,
G_N_ELEMENTS (vertices),
vertices);
/* Each face will have 6 indices so we have 6 * 6 indices in total... */
cogl_primitive_set_indices (data.prim,
data.indices,
6 * 6);
/* Load a jpeg crate texture from a file */
printf ("crate.jpg (CC by-nc-nd http://bit.ly/9kP45T) ShadowRunner27 http://bit.ly/m1YXLh\n");
data.texture = cogl_texture_new_from_file (COGL_EXAMPLES_DATA "crate.jpg",
COGL_TEXTURE_NO_SLICING,
COGL_PIXEL_FORMAT_ANY,
&error);
if (!data.texture)
g_error ("Failed to load texture: %s", error->message);
/* a CoglPipeline conceptually describes all the state for vertex
* processing, fragment processing and blending geometry. When
* drawing the geometry for the crate this pipeline says to sample a
* single texture during fragment processing... */
data.crate_pipeline = cogl_pipeline_new (ctx);
cogl_pipeline_set_layer_texture (data.crate_pipeline, 0, data.texture);
/* Since the box is made of multiple triangles that will overlap
* when drawn and we don't control the order they are drawn in, we
* enable depth testing to make sure that triangles that shouldn't
* be visible get culled by the GPU. */
cogl_depth_state_init (&depth_state);
cogl_depth_state_set_test_enabled (&depth_state, TRUE);
cogl_pipeline_set_depth_state (data.crate_pipeline, &depth_state, NULL);
/* Setup a Pango font map and context */
data.pango_font_map = COGL_PANGO_FONT_MAP (cogl_pango_font_map_new (ctx));
cogl_pango_font_map_set_use_mipmapping (data.pango_font_map, TRUE);
data.pango_context =
pango_font_map_create_context (PANGO_FONT_MAP (data.pango_font_map));
data.pango_font_desc = pango_font_description_new ();
pango_font_description_set_family (data.pango_font_desc, "Sans");
pango_font_description_set_size (data.pango_font_desc, 30 * PANGO_SCALE);
/* Setup the "Hello Cogl" text */
data.hello_label = pango_layout_new (data.pango_context);
pango_layout_set_font_description (data.hello_label, data.pango_font_desc);
pango_layout_set_text (data.hello_label, "Hello Cogl", -1);
pango_layout_get_extents (data.hello_label, NULL, &hello_label_size);
data.hello_label_width = PANGO_PIXELS (hello_label_size.width);
data.hello_label_height = PANGO_PIXELS (hello_label_size.height);
data.swap_ready = TRUE;
has_swap_notify =
cogl_has_feature (ctx, COGL_FEATURE_ID_SWAP_BUFFERS_EVENT);
if (has_swap_notify)
cogl_onscreen_add_swap_buffers_callback (COGL_ONSCREEN (fb),
swap_notify_cb,
&data);
while (1)
{
CoglPollFD *poll_fds;
int n_poll_fds;
int64_t timeout;
if (data.swap_ready)
{
paint (&data);
cogl_onscreen_swap_buffers (COGL_ONSCREEN (fb));
}
cogl_poll_get_info (ctx, &poll_fds, &n_poll_fds, &timeout);
if (!has_swap_notify)
{
/* If the winsys doesn't support swap event notification
then we'll just redraw constantly */
data.swap_ready = TRUE;
timeout = 0;
}
g_poll ((GPollFD *) poll_fds, n_poll_fds,
timeout == -1 ? -1 : timeout / 1000);
cogl_poll_dispatch (ctx, poll_fds, n_poll_fds);
}
return 0;
}
static RutDiamondSlice *
diamond_slice_new (RutContext *ctx,
float size,
int tex_width,
int tex_height)
{
RutDiamondSlice *diamond_slice = g_slice_new (RutDiamondSlice);
float width = size;
float height = size;
#define DIAMOND_SLICE_CORNER_RADIUS 20
CoglMatrix matrix;
float tex_aspect;
rut_object_init (&diamond_slice->_parent, &rut_diamond_slice_type);
diamond_slice->ref_count = 1;
diamond_slice->size = size;
{
/* x0,y0,x1,y1 and s0,t0,s1,t1 define the postion and texture
* coordinates for the center rectangle... */
float x0 = DIAMOND_SLICE_CORNER_RADIUS;
float y0 = DIAMOND_SLICE_CORNER_RADIUS;
float x1 = width - DIAMOND_SLICE_CORNER_RADIUS;
float y1 = height - DIAMOND_SLICE_CORNER_RADIUS;
/* The center region of the nine-slice can simply map to the
* degenerate center of the circle */
float s0 = 0.5;
float t0 = 0.5;
float s1 = 0.5;
float t1 = 0.5;
int n_vertices;
int i;
/*
* 0,0 x0,0 x1,0 width,0
* 0,0 s0,0 s1,0 1,0
* 0 1 2 3
*
* 0,y0 x0,y0 x1,y0 width,y0
* 0,t0 s0,t0 s1,t0 1,t0
* 4 5 6 7
*
* 0,y1 x0,y1 x1,y1 width,y1
* 0,t1 s0,t1 s1,t1 1,t1
* 8 9 10 11
*
* 0,height x0,height x1,height width,height
* 0,1 s0,1 s1,1 1,1
* 12 13 14 15
*/
VertexP2T2T2 vertices[] =
{
{ 0, 0, 0, 0, 0, 0 },
{ x0, 0, s0, 0, x0, 0},
{ x1, 0, s1, 0, x1, 0},
{ width, 0, 1, 0, width, 0},
{ 0, y0, 0, t0, 0, y0},
{ x0, y0, s0, t0, x0, y0},
{ x1, y0, s1, t0, x1, y0},
{ width, y0, 1, t0, width, y0},
{ 0, y1, 0, t1, 0, y1},
{ x0, y1, s0, t1, x0, y1},
{ x1, y1, s1, t1, x1, y1},
{ width, y1, 1, t1, width, y1},
{ 0, height, 0, 1, 0, height},
{ x0, height, s0, 1, x0, height},
{ x1, height, s1, 1, x1, height},
{ width, height, 1, 1, width, height},
};
cogl_matrix_init_identity (&diamond_slice->rotate_matrix);
cogl_matrix_rotate (&diamond_slice->rotate_matrix, 45, 0, 0, 1);
cogl_matrix_translate (&diamond_slice->rotate_matrix, - width / 2.0, - height / 2.0, 0);
n_vertices = sizeof (vertices) / sizeof (VertexP2T2T2);
for (i = 0; i < n_vertices; i++)
{
float z = 0, w = 1;
cogl_matrix_transform_point (&diamond_slice->rotate_matrix,
&vertices[i].x,
&vertices[i].y,
&z,
&w);
#ifdef MESA_CONST_ATTRIB_BUG_WORKAROUND
vertices[i].Nx = 0;
vertices[i].Ny = 0;
vertices[i].Nz = 1;
vertices[i].Tx = 1;
vertices[i].Ty = 0;
vertices[i].Tz = 0;
#endif
}
cogl_matrix_init_identity (&matrix);
{
float s_scale = 1.0, t_scale = 1.0;
float s0, t0;
float diagonal_size_scale = 1.0 / (sinf (G_PI_4) * 2.0);
tex_aspect = (float)tex_width / (float)tex_height;
if (tex_aspect < 1) /* taller than it is wide */
t_scale *= tex_aspect;
else /* wider than it is tall */
{
float inverse_aspect = 1.0f / tex_aspect;
s_scale *= inverse_aspect;
}
s_scale *= diagonal_size_scale;
t_scale *= diagonal_size_scale;
s0 = 0.5 - (s_scale / 2.0);
t0 = 0.5 - (t_scale / 2.0);
cogl_matrix_translate (&matrix, s0, t0, 0);
cogl_matrix_scale (&matrix, s_scale / width, t_scale / height, 1);
cogl_matrix_translate (&matrix, width / 2.0, height / 2.0, 1);
cogl_matrix_rotate (&matrix, 45, 0, 0, 1);
cogl_matrix_translate (&matrix, -width / 2.0, -height / 2.0, 1);
}
n_vertices = sizeof (vertices) / sizeof (VertexP2T2T2);
for (i = 0; i < n_vertices; i++)
{
float z = 0, w = 1;
cogl_matrix_transform_point (&matrix,
&vertices[i].s1,
&vertices[i].t1,
&z,
&w);
}
diamond_slice->primitive =
primitive_new_p2t2t2 (ctx->cogl_context,
COGL_VERTICES_MODE_TRIANGLES,
n_vertices,
vertices);
/* The vertices uploaded only map to the key intersection points of the
* 9-slice grid which isn't a topology that GPUs can handle directly so
* this specifies an array of indices that allow the GPU to interpret the
* vertices as a list of triangles... */
cogl_primitive_set_indices (diamond_slice->primitive,
ctx->nine_slice_indices,
sizeof (_rut_nine_slice_indices_data) /
sizeof (_rut_nine_slice_indices_data[0]));
}
return diamond_slice;
}
CoglPrimitive *
rut_camera_create_frustum_primitive (RutCamera *camera)
{
RutVertex4 vertices[8] = {
/* near plane in projection space */
{-1, -1, -1, 1, },
{ 1, -1, -1, 1, },
{ 1, 1, -1, 1, },
{-1, 1, -1, 1, },
/* far plane in projection space */
{-1, -1, 1, 1, },
{ 1, -1, 1, 1, },
{ 1, 1, 1, 1, },
{-1, 1, 1, 1, }
};
const CoglMatrix *projection_inv;
CoglAttributeBuffer *attribute_buffer;
CoglAttribute *attributes[1];
CoglPrimitive *primitive;
CoglIndices *indices;
unsigned char indices_data[24] = {
0,1, 1,2, 2,3, 3,0,
4,5, 5,6, 6,7, 7,4,
0,4, 1,5, 2,6, 3,7
};
int i;
projection_inv = rut_camera_get_inverse_projection (camera);
for (i = 0; i < 8; i++)
{
cogl_matrix_transform_point (projection_inv,
&vertices[i].x,
&vertices[i].y,
&vertices[i].z,
&vertices[i].w);
vertices[i].x /= vertices[i].w;
vertices[i].y /= vertices[i].w;
vertices[i].z /= vertices[i].w;
vertices[i].w /= 1.0f;
}
attribute_buffer = cogl_attribute_buffer_new (rut_cogl_context,
8 * sizeof (RutVertex4),
vertices);
attributes[0] = cogl_attribute_new (attribute_buffer,
"cogl_position_in",
sizeof (RutVertex4),
offsetof (RutVertex4, x),
3,
COGL_ATTRIBUTE_TYPE_FLOAT);
indices = cogl_indices_new (rut_cogl_context,
COGL_INDICES_TYPE_UNSIGNED_BYTE,
indices_data,
G_N_ELEMENTS (indices_data));
primitive = cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_LINES,
8, attributes, 1);
cogl_primitive_set_indices (primitive, indices, G_N_ELEMENTS(indices_data));
cogl_object_unref (attribute_buffer);
cogl_object_unref (attributes[0]);
cogl_object_unref (indices);
return primitive;
}
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
void ImGui_ImplGtk3Cogl_RenderDrawData(ImDrawData* draw_data)
{
// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
ImGuiIO& io = ImGui::GetIO();
int fb_width = (int)(io.DisplaySize.x * io.DisplayFramebufferScale.x);
int fb_height = (int)(io.DisplaySize.y * io.DisplayFramebufferScale.y);
if (fb_width == 0 || fb_height == 0)
return;
draw_data->ScaleClipRects(io.DisplayFramebufferScale);
cogl_framebuffer_orthographic(g_Framebuffer, 0, 0,
io.DisplaySize.x, io.DisplaySize.y,
-1, 1);
CoglContext *context = cogl_framebuffer_get_context(g_Framebuffer);
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
int idx_buffer_offset = 0;
CoglAttributeBuffer *vertices =
cogl_attribute_buffer_new(context,
cmd_list->VtxBuffer.Size * sizeof(ImDrawVert),
cmd_list->VtxBuffer.Data);
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
CoglAttribute *attrs[3] = {
cogl_attribute_new(vertices, "cogl_position_in",
sizeof(ImDrawVert), OFFSETOF(ImDrawVert, pos),
2, COGL_ATTRIBUTE_TYPE_FLOAT),
cogl_attribute_new(vertices, "cogl_tex_coord0_in",
sizeof(ImDrawVert), OFFSETOF(ImDrawVert, uv),
2, COGL_ATTRIBUTE_TYPE_FLOAT),
cogl_attribute_new(vertices, "cogl_color_in",
sizeof(ImDrawVert), OFFSETOF(ImDrawVert, col),
4, COGL_ATTRIBUTE_TYPE_UNSIGNED_BYTE)
};
#undef OFFSETOF
CoglPrimitive *primitive =
cogl_primitive_new_with_attributes(COGL_VERTICES_MODE_TRIANGLES,
cmd_list->VtxBuffer.Size,
attrs, 3);
CoglIndices *indices = cogl_indices_new(context,
sizeof(ImDrawIdx) == 2 ?
COGL_INDICES_TYPE_UNSIGNED_SHORT :
COGL_INDICES_TYPE_UNSIGNED_INT,
cmd_list->IdxBuffer.Data,
cmd_list->IdxBuffer.Size);
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
cogl_indices_set_offset(indices, sizeof(ImDrawIdx) * idx_buffer_offset);
cogl_primitive_set_indices(primitive, indices, pcmd->ElemCount);
if (pcmd->UserCallback)
{
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
bool has_texture = pcmd->TextureId != NULL;
CoglPipeline *pipeline =
has_texture ?
(cogl_is_pipeline(pcmd->TextureId) ?
(CoglPipeline *) pcmd->TextureId : g_ImagePipeline) :
g_ColorPipeline;
if (has_texture && pipeline == g_ImagePipeline) {
cogl_pipeline_set_layer_texture(g_ImagePipeline, 0,
COGL_TEXTURE(pcmd->TextureId));
}
cogl_framebuffer_push_scissor_clip(g_Framebuffer,
pcmd->ClipRect.x,
pcmd->ClipRect.y,
pcmd->ClipRect.z - pcmd->ClipRect.x,
pcmd->ClipRect.w - pcmd->ClipRect.y);
cogl_primitive_draw(primitive, g_Framebuffer, pipeline);
cogl_framebuffer_pop_clip(g_Framebuffer);
}
idx_buffer_offset += pcmd->ElemCount;
}
for (int i = 0; i < 3; i++)
cogl_object_unref(attrs[i]);
cogl_object_unref(primitive);
cogl_object_unref(vertices);
cogl_object_unref(indices);
}
}
static void
draw_frame (TestState *state)
{
CoglTexture *tex = create_texture_3d (test_ctx);
CoglPipeline *pipeline = cogl_pipeline_new (test_ctx);
typedef struct { float x, y, s, t, r; } Vert;
CoglPrimitive *primitive;
CoglAttributeBuffer *attribute_buffer;
CoglAttribute *attributes[2];
Vert *verts, *v;
int i;
cogl_pipeline_set_layer_texture (pipeline, 0, tex);
cogl_object_unref (tex);
cogl_pipeline_set_layer_filters (pipeline, 0,
COGL_PIPELINE_FILTER_NEAREST,
COGL_PIPELINE_FILTER_NEAREST);
/* Render the texture repeated horizontally twice using a regular
cogl rectangle. This should end up with the r texture coordinates
as zero */
cogl_framebuffer_draw_textured_rectangle (test_fb, pipeline,
0.0f, 0.0f, TEX_WIDTH * 2, TEX_HEIGHT,
0.0f, 0.0f, 2.0f, 1.0f);
/* Render all of the images in the texture using coordinates from a
CoglPrimitive */
v = verts = g_new (Vert, 4 * TEX_DEPTH);
for (i = 0; i < TEX_DEPTH; i++)
{
float r = (i + 0.5f) / TEX_DEPTH;
v->x = i * TEX_WIDTH;
v->y = TEX_HEIGHT;
v->s = 0;
v->t = 0;
v->r = r;
v++;
v->x = i * TEX_WIDTH;
v->y = TEX_HEIGHT * 2;
v->s = 0;
v->t = 1;
v->r = r;
v++;
v->x = i * TEX_WIDTH + TEX_WIDTH;
v->y = TEX_HEIGHT * 2;
v->s = 1;
v->t = 1;
v->r = r;
v++;
v->x = i * TEX_WIDTH + TEX_WIDTH;
v->y = TEX_HEIGHT;
v->s = 1;
v->t = 0;
v->r = r;
v++;
}
attribute_buffer = cogl_attribute_buffer_new (test_ctx,
4 * TEX_DEPTH * sizeof (Vert),
verts);
attributes[0] = cogl_attribute_new (attribute_buffer,
"cogl_position_in",
sizeof (Vert),
G_STRUCT_OFFSET (Vert, x),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
attributes[1] = cogl_attribute_new (attribute_buffer,
"cogl_tex_coord_in",
sizeof (Vert),
G_STRUCT_OFFSET (Vert, s),
3, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
primitive = cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_TRIANGLES,
6 * TEX_DEPTH,
attributes,
2 /* n_attributes */);
cogl_primitive_set_indices (primitive,
cogl_get_rectangle_indices (test_ctx,
TEX_DEPTH),
6 * TEX_DEPTH);
cogl_primitive_draw (primitive, test_fb, pipeline);
g_free (verts);
cogl_object_unref (primitive);
cogl_object_unref (attributes[0]);
cogl_object_unref (attributes[1]);
cogl_object_unref (attribute_buffer);
cogl_object_unref (pipeline);
}
static gboolean
mash_ply_loader_load (MashDataLoader *data_loader,
MashDataFlags flags,
const gchar *filename,
GError **error)
{
CoglContext *context;
CoglIndices *indices;
MashPlyLoader *self = MASH_PLY_LOADER (data_loader);
MashPlyLoaderPrivate *priv;
MashPlyLoaderData data;
gchar *display_name;
gboolean ret;
priv = self->priv;
context = es_get_cogl_context ();
data.error = NULL;
data.n_vertex_bytes = 0;
data.available_props = 0;
data.got_props = 0;
data.vertices = g_byte_array_new ();
data.faces = NULL;
data.min_vertex.x = G_MAXFLOAT;
data.min_vertex.y = G_MAXFLOAT;
data.min_vertex.z = G_MAXFLOAT;
data.max_vertex.x = -G_MAXFLOAT;
data.max_vertex.y = -G_MAXFLOAT;
data.max_vertex.z = -G_MAXFLOAT;
data.flags = flags;
display_name = g_filename_display_name (filename);
if ((data.ply = ply_open (filename,
mash_ply_loader_error_cb,
&data)) == NULL)
mash_ply_loader_check_unknown_error (&data);
else
{
if (!ply_read_header (data.ply))
mash_ply_loader_check_unknown_error (&data);
else
{
int i;
for (i = 0; i < G_N_ELEMENTS (mash_ply_loader_properties); i++)
if (ply_set_read_cb (data.ply, "vertex",
mash_ply_loader_properties[i].name,
mash_ply_loader_vertex_read_cb,
&data, i))
{
data.prop_map[i] = data.n_vertex_bytes;
data.n_vertex_bytes += mash_ply_loader_properties[i].size;
data.available_props |= 1 << i;
}
/* Align the size of a vertex to 32 bits */
data.n_vertex_bytes = (data.n_vertex_bytes + 3) & ~(guint) 3;
if ((data.available_props & MASH_PLY_LOADER_VERTEX_PROPS)
!= MASH_PLY_LOADER_VERTEX_PROPS)
g_set_error (&data.error, MASH_DATA_ERROR,
MASH_DATA_ERROR_MISSING_PROPERTY,
"PLY file %s is missing the vertex properties",
display_name);
else if (!ply_set_read_cb (data.ply, "face", "vertex_indices",
mash_ply_loader_face_read_cb,
&data, i))
g_set_error (&data.error, MASH_DATA_ERROR,
MASH_DATA_ERROR_MISSING_PROPERTY,
"PLY file %s is missing face property "
"'vertex_indices'",
display_name);
else if (mash_ply_loader_get_indices_type (&data, &data.error)
&& !ply_read (data.ply))
mash_ply_loader_check_unknown_error (&data);
}
ply_close (data.ply);
}
if (data.error)
{
g_propagate_error (error, data.error);
ret = FALSE;
}
else if (data.faces->len < 3)
{
g_set_error (error, MASH_DATA_ERROR,
MASH_DATA_ERROR_INVALID,
"No faces found in %s",
display_name);
ret = FALSE;
}
else
{
CoglAttributeBuffer *attribute_buffer;
CoglAttribute *attributes[4];
int n_attributes = 0, i;
/* Get rid of the old primitive (if any) */
mash_ply_loader_free_primitive (self);
/* Create a new attribute buffer for the vertices */
attribute_buffer = cogl_attribute_buffer_new (context,
data.vertices->len,
data.vertices->data);
/* And describe the attributes */
if ((data.available_props & MASH_PLY_LOADER_VERTEX_PROPS) ==
MASH_PLY_LOADER_VERTEX_PROPS)
{
attributes[n_attributes++] =
cogl_attribute_new (attribute_buffer,
"cogl_position_in",
data.n_vertex_bytes,
data.prop_map[0],
3,
COGL_ATTRIBUTE_TYPE_FLOAT);
}
if ((data.available_props & MASH_PLY_LOADER_NORMAL_PROPS) ==
MASH_PLY_LOADER_NORMAL_PROPS)
{
attributes[n_attributes++] =
cogl_attribute_new (attribute_buffer,
"cogl_normal_in",
data.n_vertex_bytes,
data.prop_map[3],
3,
COGL_ATTRIBUTE_TYPE_FLOAT);
}
if ((data.available_props & MASH_PLY_LOADER_TEX_COORD_PROPS) ==
MASH_PLY_LOADER_TEX_COORD_PROPS)
{
attributes[n_attributes++] =
cogl_attribute_new (attribute_buffer,
"cogl_tex_coord0_in",
data.n_vertex_bytes,
data.prop_map[6],
2,
COGL_ATTRIBUTE_TYPE_FLOAT);
}
if ((data.available_props & MASH_PLY_LOADER_COLOR_PROPS) ==
MASH_PLY_LOADER_COLOR_PROPS)
{
attributes[n_attributes++] =
cogl_attribute_new (attribute_buffer,
"cogl_color_in",
data.n_vertex_bytes,
data.prop_map[8],
3,
COGL_ATTRIBUTE_TYPE_FLOAT);
}
priv->primitive =
cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_TRIANGLES,
data.vertices->len,
attributes, n_attributes);
for (i = 0; i < n_attributes; i++)
cogl_object_unref (attributes[i]);
indices = cogl_indices_new (context,
data.indices_type,
data.faces->data,
data.faces->len);
cogl_primitive_set_indices (priv->primitive,
indices,
data.faces->len);
cogl_object_unref (indices);
priv->min_vertex = data.min_vertex;
priv->max_vertex = data.max_vertex;
ret = TRUE;
}
g_free (display_name);
g_byte_array_free (data.vertices, TRUE);
if (data.faces)
g_array_free (data.faces, TRUE);
return ret;
}
