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#include <cogl/cogl.h>
#include "test-declarations.h"
#include "test-utils.h"
/* This test assumes the GL driver supports point sizes up to 16
pixels. Cogl should probably have some way of querying the size so
we start from that instead */
#define MAX_POINT_SIZE 16
#define MIN_POINT_SIZE 4
#define N_POINTS (MAX_POINT_SIZE - MIN_POINT_SIZE + 1)
/* The size of the area that we'll paint each point in */
#define POINT_BOX_SIZE (MAX_POINT_SIZE * 2)
typedef struct
{
float x, y;
float point_size;
} PointVertex;
static int
calc_coord_offset (int pos, int pos_index, int point_size)
{
switch (pos_index)
{
case 0: return pos - point_size / 2 - 2;
case 1: return pos - point_size / 2 + 2;
case 2: return pos + point_size / 2 - 2;
case 3: return pos + point_size / 2 + 2;
}
g_assert_not_reached ();
return 0;
}
static void
verify_point_size (CoglFramebuffer *test_fb,
int x_pos,
int y_pos,
int point_size)
{
int y, x;
for (y = 0; y < 4; y++)
for (x = 0; x < 4; x++)
{
gboolean in_point = x >= 1 && x <= 2 && y >= 1 && y <= 2;
uint32_t expected_pixel = in_point ? 0x00ff00ff : 0xff0000ff;
test_utils_check_pixel (test_fb,
calc_coord_offset (x_pos, x, point_size),
calc_coord_offset (y_pos, y, point_size),
expected_pixel);
}
}
static CoglPrimitive *
create_primitive (const char *attribute_name)
{
PointVertex vertices[N_POINTS];
CoglAttributeBuffer *buffer;
CoglAttribute *attributes[2];
CoglPrimitive *prim;
int i;
for (i = 0; i < N_POINTS; i++)
{
vertices[i].x = i * POINT_BOX_SIZE + POINT_BOX_SIZE / 2;
vertices[i].y = POINT_BOX_SIZE / 2;
vertices[i].point_size = MAX_POINT_SIZE - i;
}
buffer = cogl_attribute_buffer_new (test_ctx,
sizeof (vertices),
vertices);
attributes[0] = cogl_attribute_new (buffer,
"cogl_position_in",
sizeof (PointVertex),
G_STRUCT_OFFSET (PointVertex, x),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
attributes[1] = cogl_attribute_new (buffer,
attribute_name,
sizeof (PointVertex),
G_STRUCT_OFFSET (PointVertex, point_size),
1, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
prim = cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_POINTS,
N_POINTS,
attributes,
2 /* n_attributes */);
for (i = 0; i < 2; i++)
cogl_object_unref (attributes[i]);
return prim;
}
static void
do_test (const char *attribute_name,
void (* pipeline_setup_func) (CoglPipeline *pipeline))
{
int fb_width = cogl_framebuffer_get_width (test_fb);
int fb_height = cogl_framebuffer_get_height (test_fb);
CoglPrimitive *primitive;
CoglPipeline *pipeline;
int i;
cogl_framebuffer_orthographic (test_fb,
0, 0, /* x_1, y_1 */
fb_width, /* x_2 */
fb_height /* y_2 */,
-1, 100 /* near/far */);
cogl_framebuffer_clear4f (test_fb,
COGL_BUFFER_BIT_COLOR,
1.0f, 0.0f, 0.0f, 1.0f);
primitive = create_primitive (attribute_name);
pipeline = cogl_pipeline_new (test_ctx);
cogl_pipeline_set_color4ub (pipeline, 0x00, 0xff, 0x00, 0xff);
cogl_pipeline_set_per_vertex_point_size (pipeline, TRUE, NULL);
if (pipeline_setup_func)
pipeline_setup_func (pipeline);
cogl_primitive_draw (primitive, test_fb, pipeline);
cogl_object_unref (pipeline);
cogl_object_unref (primitive);
/* Verify all of the points where drawn at the right size */
for (i = 0; i < N_POINTS; i++)
verify_point_size (test_fb,
i * POINT_BOX_SIZE + POINT_BOX_SIZE / 2, /* x */
POINT_BOX_SIZE / 2, /* y */
MAX_POINT_SIZE - i /* point size */);
if (cogl_test_verbose ())
g_print ("OK\n");
}
void
test_point_size_attribute (void)
{
do_test ("cogl_point_size_in", NULL);
}
static void
setup_snippet (CoglPipeline *pipeline)
{
CoglSnippet *snippet;
snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_POINT_SIZE,
"attribute float "
"my_super_duper_point_size_attrib;\n",
NULL);
cogl_snippet_set_replace (snippet,
"cogl_point_size_out = "
"my_super_duper_point_size_attrib;\n");
cogl_pipeline_add_snippet (pipeline, snippet);
cogl_object_unref (snippet);
}
void
test_point_size_attribute_snippet (void)
{
do_test ("my_super_duper_point_size_attrib", setup_snippet);
}
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