void onDraw(SkCanvas* canvas) override {
draw_pass(canvas, kCheckerboard_Pass);
canvas->saveLayer(nullptr, nullptr);
canvas->translate(kMargin, kMargin);
draw_pass(canvas, kBackground_Pass);
SkPaint titlePaint(fLabelPaint);
titlePaint.setTextSize(9 * titlePaint.getTextSize() / 8);
titlePaint.setFakeBoldText(true);
titlePaint.setTextAlign(SkPaint::kCenter_Align);
canvas->drawText("Porter Duff", sizeof("Porter Duff") - 1,
kLabelSpacing + 4 * kShapeTypeSpacing,
kTitleSpacing / 2 + titlePaint.getTextSize() / 3, titlePaint);
canvas->drawText("Advanced", sizeof("Advanced") - 1,
kXfermodeTypeSpacing + kLabelSpacing + 4 * kShapeTypeSpacing,
kTitleSpacing / 2 + titlePaint.getTextSize() / 3, titlePaint);
draw_pass(canvas, kShape_Pass);
canvas->restore();
}
static void draw_camera(int i, int j, int f, float a)
{
struct camera *c = get_camera(i);
init_camera(i);
if (c->frame)
{
/* Apply a basic projection for offscreen rendering. */
glMatrixMode(GL_PROJECTION);
{
glPushMatrix();
glLoadIdentity();
if (c->type == CAMERA_ORTHO)
glOrtho (c->l, c->r, c->b, c->t, c->n, c->f);
else
glFrustum(c->l, c->r, c->b, c->t, c->n, c->f);
}
glMatrixMode(GL_MODELVIEW);
{
glPushMatrix();
glLoadIdentity();
}
/* Render the scene to the offscreen buffer. */
glPushAttrib(GL_VIEWPORT_BIT | GL_SCISSOR_BIT);
{
int w = get_image_w(c->image);
int h = get_image_h(c->image);
glViewport(0, 0, w, h);
glScissor (0, 0, w, h);
opengl_push_framebuffer(c->frame);
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
draw_scene(j, f, a);
}
opengl_pop_framebuffer();
}
glPopAttrib();
/* Revert the projection. */
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
else
{
int eye;
int tile;
int pass;
/* Iterate over all tiles of this host. */
for (tile = 0; tile < (int) get_tile_count(); ++tile)
{
float d[2][3];
/* Iterate over the eyes. */
get_eye_pos(d[0], c, 0, tile);
get_eye_pos(d[1], c, 1, tile);
for (eye = 0; eye < (c->mode ? 2 : 1); ++eye)
{
camera_eye = eye;
if (draw_tile(c, eye, tile, d[eye]))
{
pass = 0;
/* Iterate over all passes of this eye and tile. */
while ((pass = draw_pass(c->mode, eye, tile, pass, d)))
{
if (get_tile_flags(tile) & TILE_TEST_COLOR)
draw_color(j, eye);
else if (get_tile_flags(tile) & TILE_TEST_GHOST)
draw_ghost(j, eye);
else
draw_scene(j, f, a);
}
}
}
}
/* HACK */
if (c->mode != STEREO_VARRIER_00)
opengl_set_fence();
}
}