static void
test_pipeline (CoglPipeline *pipeline,
int x_offset,
int y_offset,
const uint8_t expected_colors[9])
{
float x1 = x_offset;
float y1 = y_offset;
float x2 = x1 + DRAW_SIZE;
float y2 = y1 + DRAW_SIZE;
int y, x;
cogl_framebuffer_draw_textured_rectangle (test_fb,
pipeline,
x1, y1,
x2, y2,
-0.5f, /* s1 */
-0.5f, /* t1 */
1.5f, /* s2 */
1.5f /* t2 */);
check_colors (x_offset, y_offset, expected_colors);
/* Also try drawing each quadrant of the rectangle with a small
* rectangle */
for (y = -1; y < 3; y++)
for (x = -1; x < 3; x++)
{
x1 = x_offset + (x + 1) * DRAW_SIZE / 4 + DRAW_SIZE;
y1 = y_offset + (y + 1) * DRAW_SIZE / 4;
x2 = x1 + DRAW_SIZE / 4;
y2 = y1 + DRAW_SIZE / 4;
cogl_framebuffer_draw_textured_rectangle (test_fb,
pipeline,
x1, y1,
x2, y2,
x / 2.0f, /* s1 */
y / 2.0f, /* t1 */
(x + 1) / 2.0f, /* s2 */
(y + 1) / 2.0f /* t2 */);
}
check_colors (x_offset + DRAW_SIZE, y_offset, expected_colors);
}
static void
texture_tower_revalidate_fbo (MetaTextureTower *tower,
int level)
{
CoglTexture *source_texture = tower->textures[level - 1];
int source_texture_width = cogl_texture_get_width (source_texture);
int source_texture_height = cogl_texture_get_height (source_texture);
CoglTexture *dest_texture = tower->textures[level];
int dest_texture_width = cogl_texture_get_width (dest_texture);
int dest_texture_height = cogl_texture_get_height (dest_texture);
Box *invalid = &tower->invalid[level];
CoglFramebuffer *fb;
CoglError *catch_error = NULL;
CoglPipeline *pipeline;
if (tower->fbos[level] == NULL)
tower->fbos[level] = cogl_offscreen_new_with_texture (dest_texture);
fb = COGL_FRAMEBUFFER (tower->fbos[level]);
if (!cogl_framebuffer_allocate (fb, &catch_error))
{
cogl_error_free (catch_error);
return;
}
cogl_framebuffer_orthographic (fb, 0, 0, dest_texture_width, dest_texture_height, -1., 1.);
if (!tower->pipeline_template)
{
CoglContext *ctx =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
tower->pipeline_template = cogl_pipeline_new (ctx);
cogl_pipeline_set_blend (tower->pipeline_template, "RGBA = ADD (SRC_COLOR, 0)", NULL);
}
pipeline = cogl_pipeline_copy (tower->pipeline_template);
cogl_pipeline_set_layer_texture (pipeline, 0, tower->textures[level - 1]);
cogl_framebuffer_draw_textured_rectangle (fb, pipeline,
invalid->x1, invalid->y1,
invalid->x2, invalid->y2,
(2. * invalid->x1) / source_texture_width,
(2. * invalid->y1) / source_texture_height,
(2. * invalid->x2) / source_texture_width,
(2. * invalid->y2) / source_texture_height);
cogl_object_unref (pipeline);
}
static void
paint_test_backface_culling (TestState *state,
CoglFramebuffer *framebuffer)
{
int draw_num;
CoglPipeline *base_pipeline = cogl_pipeline_new (test_ctx);
cogl_framebuffer_orthographic (framebuffer,
0, 0,
state->width,
state->height,
-1,
100);
cogl_framebuffer_clear4f (framebuffer,
COGL_BUFFER_BIT_COLOR | COGL_BUFFER_BIT_STENCIL,
0, 0, 0, 1);
cogl_pipeline_set_layer_texture (base_pipeline, 0, state->texture);
cogl_pipeline_set_layer_filters (base_pipeline, 0,
COGL_PIPELINE_FILTER_NEAREST,
COGL_PIPELINE_FILTER_NEAREST);
/* Render the scene eight times to test all of the combinations of
cull face mode and winding orders */
for (draw_num = 0; draw_num < 8; draw_num++)
{
float x1 = 0, x2, y1 = 0, y2 = (float)(TEXTURE_RENDER_SIZE);
CoglTextureVertex verts[4];
CoglPipeline *pipeline;
cogl_framebuffer_push_matrix (framebuffer);
cogl_framebuffer_translate (framebuffer,
0, TEXTURE_RENDER_SIZE * draw_num, 0);
pipeline = cogl_pipeline_copy (base_pipeline);
cogl_pipeline_set_front_face_winding (pipeline, FRONT_WINDING (draw_num));
cogl_pipeline_set_cull_face_mode (pipeline, CULL_FACE_MODE (draw_num));
memset (verts, 0, sizeof (verts));
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
/* Draw a front-facing texture */
cogl_framebuffer_draw_rectangle (framebuffer, pipeline, x1, y1, x2, y2);
x1 = x2;
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
/* Draw a front-facing texture with flipped texcoords */
cogl_framebuffer_draw_textured_rectangle (framebuffer,
pipeline,
x1, y1, x2, y2,
1.0, 0.0, 0.0, 1.0);
x1 = x2;
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
/* Draw a back-facing texture */
cogl_framebuffer_draw_rectangle (framebuffer, pipeline, x2, y1, x1, y2);
cogl_framebuffer_pop_matrix (framebuffer);
cogl_object_unref (pipeline);
}
cogl_object_unref (base_pipeline);
}
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);
}
/**
* meta_shadow_paint:
* @window_x: x position of the region to paint a shadow for
* @window_y: y position of the region to paint a shadow for
* @window_width: actual width of the region to paint a shadow for
* @window_height: actual height of the region to paint a shadow for
* @clip: (nullable): if non-%NULL specifies the visible portion
* of the shadow.
* @clip_strictly: if %TRUE, drawing will be clipped strictly
* to @clip, otherwise, it will be only used to optimize
* drawing.
*
* Paints the shadow at the given position, for the specified actual
* size of the region. (Since a #MetaShadow can be shared between
* different sizes with the same extracted #MetaWindowShape the
* size needs to be passed in here.)
*/
void
meta_shadow_paint (MetaShadow *shadow,
CoglFramebuffer *framebuffer,
int window_x,
int window_y,
int window_width,
int window_height,
guint8 opacity,
cairo_region_t *clip,
gboolean clip_strictly)
{
float texture_width = cogl_texture_get_width (shadow->texture);
float texture_height = cogl_texture_get_height (shadow->texture);
int i, j;
float src_x[4];
float src_y[4];
int dest_x[4];
int dest_y[4];
int n_x, n_y;
gboolean source_updated = FALSE;
if (shadow->scale_width)
{
n_x = 3;
src_x[0] = 0.0;
src_x[1] = (shadow->inner_border_left + shadow->outer_border_left) / texture_width;
src_x[2] = (texture_width - (shadow->inner_border_right + shadow->outer_border_right)) / texture_width;
src_x[3] = 1.0;
dest_x[0] = window_x - shadow->outer_border_left;
dest_x[1] = window_x + shadow->inner_border_left;
dest_x[2] = window_x + window_width - shadow->inner_border_right;
dest_x[3] = window_x + window_width + shadow->outer_border_right;
}
else
{
n_x = 1;
src_x[0] = 0.0;
src_x[1] = 1.0;
dest_x[0] = window_x - shadow->outer_border_left;
dest_x[1] = window_x + window_width + shadow->outer_border_right;
}
if (shadow->scale_height)
{
n_y = 3;
src_y[0] = 0.0;
src_y[1] = (shadow->inner_border_top + shadow->outer_border_top) / texture_height;
src_y[2] = (texture_height - (shadow->inner_border_bottom + shadow->outer_border_bottom)) / texture_height;
src_y[3] = 1.0;
dest_y[0] = window_y - shadow->outer_border_top;
dest_y[1] = window_y + shadow->inner_border_top;
dest_y[2] = window_y + window_height - shadow->inner_border_bottom;
dest_y[3] = window_y + window_height + shadow->outer_border_bottom;
}
else
{
n_y = 1;
src_y[0] = 0.0;
src_y[1] = 1.0;
dest_y[0] = window_y - shadow->outer_border_top;
dest_y[1] = window_y + window_height + shadow->outer_border_bottom;
}
for (j = 0; j < n_y; j++)
{
cairo_rectangle_int_t dest_rect;
dest_rect.y = dest_y[j];
dest_rect.height = dest_y[j + 1] - dest_y[j];
if (dest_rect.height == 0)
continue;
for (i = 0; i < n_x; i++)
{
cairo_region_overlap_t overlap;
dest_rect.x = dest_x[i];
dest_rect.width = dest_x[i + 1] - dest_x[i];
if (dest_rect.width == 0)
continue;
if (clip)
overlap = cairo_region_contains_rectangle (clip, &dest_rect);
else
overlap = CAIRO_REGION_OVERLAP_IN;
if (overlap == CAIRO_REGION_OVERLAP_OUT)
continue;
if (!source_updated)
{
cogl_pipeline_set_color4ub (shadow->pipeline,
opacity, opacity, opacity, opacity);
cogl_set_source (shadow->pipeline);
source_updated = TRUE;
}
/* There's quite a bit of overhead from allocating a new
* region in order to find an exact intersection and
* generating more geometry - we make the assumption that
* unless we have to clip strictly it will be cheaper to
* just draw the entire rectangle.
*/
if (overlap == CAIRO_REGION_OVERLAP_IN ||
(overlap == CAIRO_REGION_OVERLAP_PART && !clip_strictly))
{
cogl_framebuffer_draw_textured_rectangle (framebuffer,
shadow->pipeline,
dest_x[i], dest_y[j],
dest_x[i + 1], dest_y[j + 1],
src_x[i], src_y[j],
src_x[i + 1], src_y[j + 1]);
}
else if (overlap == CAIRO_REGION_OVERLAP_PART)
{
cairo_region_t *intersection;
int n_rectangles, k;
intersection = cairo_region_create_rectangle (&dest_rect);
cairo_region_intersect (intersection, clip);
n_rectangles = cairo_region_num_rectangles (intersection);
for (k = 0; k < n_rectangles; k++)
{
cairo_rectangle_int_t rect;
float src_x1, src_x2, src_y1, src_y2;
cairo_region_get_rectangle (intersection, k, &rect);
/* Separately linear interpolate X and Y coordinates in the source
* based on the destination X and Y coordinates */
src_x1 = (src_x[i] * (dest_rect.x + dest_rect.width - rect.x) +
src_x[i + 1] * (rect.x - dest_rect.x)) / dest_rect.width;
src_x2 = (src_x[i] * (dest_rect.x + dest_rect.width - (rect.x + rect.width)) +
src_x[i + 1] * (rect.x + rect.width - dest_rect.x)) / dest_rect.width;
src_y1 = (src_y[j] * (dest_rect.y + dest_rect.height - rect.y) +
src_y[j + 1] * (rect.y - dest_rect.y)) / dest_rect.height;
src_y2 = (src_y[j] * (dest_rect.y + dest_rect.height - (rect.y + rect.height)) +
src_y[j + 1] * (rect.y + rect.height - dest_rect.y)) / dest_rect.height;
cogl_framebuffer_draw_textured_rectangle (framebuffer,
shadow->pipeline,
rect.x, rect.y,
rect.x + rect.width, rect.y + rect.height,
src_x1, src_y1, src_x2, src_y2);
}
cairo_region_destroy (intersection);
}
}
}
}
