* GRIM: Use ScummVM's 2D API for blitting the TinyGL framebuffer
* MYST3: Use ScummVM's 2D API for blitting the TinyGL framebuffer
* ICB: Use ScummVM's 2D API for blitting the TinyGL framebuffer
Exposed to command line via --[no-]dirtyrects.
As dirty rectangles make the workload vary a lot between frames, it makes
performance regressions harder to spot. Disabling it produces lower, but
much more regular FPS counts.
These were present to implement actor freezing in software rendering mode
in the way original engine was intended for performance reason.
In residualvm, software rendering will generalise the principle through
dirty-rectangles management, so off-screen buffers should not be needed.
Also, properly implementing them requires invasive changes (move previous
draw call list from global OpenGL context to individual off-screen buffers,
along with associated linear vertex allocator, adding a new draw call to
track requested buffer changes until final on-screen frame buffer
presentation).
So instead of such added complexity, lie to lua API about actor not being
in set but keep it in so it is part of normal redraw sequence.
Fixes disappearing actors in cn, bi.
Likely also fixes at, ly, sh, mn, dd which uses free/thaw lua API, but
which I did not check.
As is done for OpenGL. It allows TinyGL to take shortcuts in coordinates
transformations of all vertices.
Also, reduce trivial diffs with gfx_opengl.cpp .
Fixes save game screenshots with TinyGL: without this, the screenshot
content is the menu at the time user confirmed the save, and not the
original scene.
This is consistent with OpenGL behaviour, where framebuffer-reading
operations implicitly call glFlush.
So caller does not have to depend on the pixel format used internally to
BlitImage.
Update callers which do request for color keying (GRIM/EMI only).
Also, remove a special-casing of transparent color when converting image
format which sets a color in a packed format independent from actual
destination format.
Also, in GfxTinyGL::createTextObject, prefer changing invisible colorKey
value than actually-visible color.
KOLANICH
Donovan Watteau
Vladimir Serbinenko
Cameron Cawley
Paweł Kołodziejski
Eugene Sandulenko
Orgad Shaneh
Laurent Merckx
Pawel Kolodziejski
Bastien Bouclet
Vincent Pelletier
Paweł Kołodziejski