mirror of
https://github.com/RetroDECK/Supermodel.git
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719 lines
26 KiB
C++
719 lines
26 KiB
C++
/**
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** Supermodel
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** A Sega Model 3 Arcade Emulator.
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** Copyright 2011-2012 Bart Trzynadlowski, Nik Henson
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**
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** This file is part of Supermodel.
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**
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** Supermodel is free software: you can redistribute it and/or modify it under
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** the terms of the GNU General Public License as published by the Free
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** Software Foundation, either version 3 of the License, or (at your option)
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** any later version.
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**
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** Supermodel is distributed in the hope that it will be useful, but WITHOUT
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** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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** more details.
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**
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** You should have received a copy of the GNU General Public License along
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** with Supermodel. If not, see <http://www.gnu.org/licenses/>.
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**/
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/*
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* Render2D.cpp
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*
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* Implementation of the CRender2D class: OpenGL tile generator graphics.
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*
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* To-Do List
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* ----------
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* - Is there a universal solution to the 'ROLLING START' scrolling bug (Scud
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* Race) and the scrolling text during Magical Truck Adventure's attract
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* mode? To fix Scud Race, either the stencil mask or the h-scroll value must
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* be shifted by 16 pixels. Magical Truck Adventure is similar but opposite.
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* Perhaps this is a function of timing registers accessed via JTAG?
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* - Is there a better way to handle the overscan regions in wide screen mode?
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* Is clearing two thin viewports better than one big clear?
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* - Are v-scroll values 9 or 10 bits? (Does it matter?) Lost World seems to
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* have some scrolling issues.
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* - A proper shut-down function is needed! OpenGL might not be available when
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* the destructor for this class is called.
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*
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* Tile Generator Hardware Overview
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* --------------------------------
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*
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* Model 3's medium resolution tile generator hardware appears to be derived
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* from the Model 2 and System 24 chipset, but is much simpler. It consists of
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* four 64x64 tile layers, comprised of 8x8 pixel tiles, with configurable
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* priorities. There may be additional features but so far, no known Model 3
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* games use them.
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*
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* VRAM is comprised of 1 MB for tile data and an additional 128 KB for the
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* palette (each color occupies 32 bits). The four tilemap layers are referred
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* to as: A (0), A' (1), B (2), and B' (3). Palette RAM may be located on a
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* separate RAM IC.
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*
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* Registers
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* ---------
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*
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* Registers are listed by their byte offset in the PowerPC address space. Each
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* is 32 bits wide and little endian. Only those registers relevant to
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* rendering are listed here (see CTileGen for others).
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*
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* Offset: Description:
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*
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* 0x20 Layer configuration
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* 0x40 Layer A/A' color offset
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* 0x44 Layer B/B' color offset
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* 0x60 Layer A scroll
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* 0x64 Layer A' scroll
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* 0x68 Layer B scroll
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* 0x6C Layer B' scroll
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*
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* Layer configuration is formatted as:
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*
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* 31 0
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* ???? ???? ???? ???? pqrs tuvw ???? ????
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*
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* Bits 'pqrs' control the color depth of layers B', B, A', and A,
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* respectively. If set, the layer's pattern data is encoded as 4 bits,
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* otherwise the pixels are 8 bits.
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*
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* Bits 'tuvw' control priority for layers B', B, A', and A, respectively,
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* which is also the relative ordering of the layers from bottom to top. For
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* each layer, if its bit is clear, it will be drawn below the 3D layer,
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* otherwise it is drawn on top.
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*
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* The remaining registers are described where appropriate further below.
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*
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* VRAM Memory Map
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* ---------------
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*
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* The lower 1 MB of VRAM is used for storing tiles, per-line horizontal scroll
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* values, and the stencil mask, which determines which of each pair of layers
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* is displayed on a given line and column.
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*
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* 00000-F5FFF Tile pattern data
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* F6000-F63FF Layer A horizontal scroll table (512 lines)
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* F6400-F67FF Layer A' horizontal scroll table
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* F6800-F6BFF Layer B horizontal scroll table
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* F6C00-F6FFF Layer B' horizontal scroll table
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* F7000-F77FF Mask table (assuming 4 bytes per line, 512 lines)
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* F7800-F7FFF ?
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* F8000-F9FFF Layer A name table
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* FA000-FBFFF Layer A' name table
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* FC000-FDFFF Layer B name table
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* FE000-FFFFF Layer B' name table
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*
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* Tiles may actually address the entire 1 MB space, although in practice,
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* that would conflict with the other fixed memory regions.
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*
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* Palette
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* -------
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*
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* The palette stores 32768 colors. Each entry is a little endian 32-bit word.
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* The upper 16 bits are unused and the lower 16 bits contain the color:
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*
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* 15 0
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* tbbb bbgg gggr rrrr
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*
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* The 't' bit is for transparency. When set, pixels of that color are
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* transparent, unless they are the bottom-most layer.
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*
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* Tile Name Table and Pattern Layout
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* ----------------------------------
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*
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* The name table is a 64x64 array of 16-bit words serving as indices for tile
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* pattern data and the palette. The first 64 words correspond to the first
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* row of tiles, the next 64 to the second row, etc. Although 64x64 entries
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* describes a 512x512 pixel screen, only the upper-left 62x48 tiles are
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* visible when the vertical and horizontal scroll values are 0. Scrolling
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* moves the 496x384 pixel 'window' around, with individual wrapping of the
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* two axes.
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*
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* The data is actually arranged in 32-bit chunks in little endian format, so
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* that tiles 0, 1, 2, and 3 will be stored as 1, 0, 3, 2. Fetching two name
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* table entries as a single 32-bit word places the left tile in the high 16
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* bits and the right tile in the low 16 bits.
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*
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* The format of a name table entry in 4-bit color mode is:
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*
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* 15 0
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* jkpp pppp pppp iiii
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*
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* The pattern index is '0ppp pppp pppi iiij'. Multiplying by 32 yields the
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* offset in VRAM at which the tile pattern data is stored. Note that the MSB
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* of the name table entry becomes the LSB of the pattern index. This allows
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* for 32768 4-bit tile patterns, each occupying 32 bytes, which means the
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* whole 1 MB VRAM space can be addressed.
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*
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* The 4-bit pattern data is stored as 8 32-bit words. Each word stores a row
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* of 8 pixels:
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*
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* 31 0
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* aaaa bbbb cccc dddd eeee ffff gggg hhhh
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*
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* 'a' is the left-most pixel data. These 4-bit values are combined with bits
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* from the name table to form a palette index, which determines the final
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* color. For example, for pixel 'a', the 15-bit color index is:
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*
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* 14 0
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* kpp pppp pppp aaaa
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*
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* Note that index bits are re-used to form the palette index, meaning that
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* the pattern address partly determines the color.
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*
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* In 8-bit color mode, the name table entry looks like:
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*
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* 15 0
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* ?ppp pppp iiii iiii
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*
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* The low 15 'p' and 'i' bits together form the pattern index, which must be
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* multiplied by 64 to get the offset. The pattern data now consists of 16 32-
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* bit words, each containing four 8-bit pixels:
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*
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* 31 0
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* aaaa aaaa bbbb bbbb cccc cccc dddd dddd
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*
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* 'a' is the left-most pixel. Each line is therefore comprised of two 32-bit
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* words. The palette index for pixel 'a' is now formed from:
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*
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* 14 0
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* ppp pppp aaaa aaaa
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*
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* Stencil Mask
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* ------------
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*
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* For any pixel position, there are in fact only two visible layers, despite
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* there being four defined layers. The layers are grouped in pairs: A (the
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* 'primary' layer) and A' (the 'alternate') form one pair, and B and B' form
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* the other. Only one of the primary or alternate layers from each group may
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* be visible at a given position. The 'stencil mask' controls this.
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*
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* The mask table is a bit field organized into 512 (or 384?) lines with each
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* bit controlling four columns (32 pixels). The mask does not appear to be
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* affected by scrolling -- that is, it does not scroll with the underlying
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* tiles, which do so independently. The mask remains fixed.
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*
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* Each mask entry is a little endian 32-bit word. The high 16 bits control
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* A/A' and the low 16 bits control B/B'. Each word controls an entire line
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* (32 pixels per bit, 512 pixels per 16-bit line mask, where the first 16
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* pixels are allocated to the overscan region.) If a bit is set to 1, the
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* pixel from the primary layer is used, otherwise the alternate layer is
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* used when the mask is 0. It is important to remember that the layers may
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* have been scrolled independently. The mask operates on the final resultant
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* two pixels that are determined for each location.
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*
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* Example of a line mask:
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*
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* 31 15 0
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* 0111 0000 0000 1111 0000 0000 1111 1111
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*
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* These settings would display layer A' for the first 32 pixels of the line,
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* followed by layer A for the next 96 pixels, A' for the subsequent 256
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* pixels, and A for the final 128 pixels. The first 256 pixels of the line
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* would display layer B' and the second 256 pixels would be from layer B.
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*
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* The stencil mask does not affect layer priorities, which are managed
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* separately regardless of mask settings.
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*
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* Scrolling
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* ---------
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*
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* Each of the four layers can be scrolled independently. Vertical scroll
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* values are stored in the appropriate scroll register and horizontal scroll
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* values can be sourced either from the register (in which case the entire
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* layer will be scrolled uniformly) or from a table in VRAM (which contains
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* independent values for each line).
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*
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* The scroll registers are laid out as:
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*
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* 31 0
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* e??? ???y yyyy yyyy h??? ??xx xxxx xxxx
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*
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* The 'e' bit enables the layer when set. The 'y' bits comprise a vertical
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* scroll value in pixels. The 'x' bits form a horizontal scroll value. If 'h'
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* is set, then the VRAM table (line-by-line scrolling) is used, otherwise the
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* 'x' values are applied to every line. It is also possible that the scroll
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* values use more or less bits, but probably no more than 1.
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*
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* Each line must be wrapped back to the beginning of the same line. Likewise,
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* vertical scrolling wraps around back to the top of the tilemap.
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*
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* The horizontal scroll table is a series of 16-bit little endian words, one
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* for each line beginning at 0. It appears all the values can be used for
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* scrolling (no control bits have been observed). The number of bits actually
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* used by the hardware is irrelevant -- wrapping has the effect of making
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* higher order bits unimportant.
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*
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* Layer Priorities
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* ----------------
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*
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* The layer control register (0x20) contains 4 bits that appear to control
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* layer priorities. It is assumed that the 3D graphics, output by the Real3D
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* pixel processors independently of the tile generator, constitute their own
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* 'layer' and that the 2D tilemaps appear in front or behind. There may be a
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* specific function for each priority bit or the field may be interpreted as a
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* single 4-bit value denoting preset layer orders.
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*
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* Color Offsets
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* -------------
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*
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* Color offsets can be applied to the final RGB color value of every pixel.
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* This is used for effects such as fading to a certain color, lightning (Lost
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* World), etc. The current best guess is that the two registers control each
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* pair (A/A' and B/B') of layers. The format appears to be:
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*
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* 31 0
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* ???? ???? rrrr rrrr gggg gggg bbbb bbbb
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*
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* Where 'r', 'g', and 'b' appear to be signed 8-bit color offsets. Because
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* they exceed the color resolution of the palette, they must be scaled
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* appropriately.
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*
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* Color offset registers are handled in TileGen.cpp. Two palettes are computed
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* -- one for A/A' and another for B/B'. These are passed to the renderer.
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*/
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#include "Render2D.h"
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#include "Supermodel.h"
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#include "Shader.h"
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#include "Shaders2D.h" // fragment and vertex shaders
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#include <cstring>
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#include <GL/glew.h>
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/******************************************************************************
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Definitions and Constants
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******************************************************************************/
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// Shader program files (for use in development builds only)
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#define VERTEX_2D_SHADER_FILE "Src/Graphics/Vertex2D.glsl"
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#define FRAGMENT_2D_SHADER_FILE "Src/Graphics/Fragment2D.glsl"
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/******************************************************************************
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Layer Rendering
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This code is quite slow and badly needs to be optimized. Dirty rectangles
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should be implemented first and tile pre-decoding second.
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******************************************************************************/
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template <int bits, bool alphaTest, bool clip>
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static inline void DrawTileLine(uint32_t *line, int pixelOffset, uint16_t tile, int patternLine, const uint32_t *vram, const uint32_t *palette, uint16_t mask)
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{
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static_assert(bits == 4 || bits == 8, "Tiles are either 4- or 8-bit");
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// For 8-bit pixels, each line of tile pattern is two words
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if (bits == 8)
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patternLine *= 2;
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// Compute offset of pattern for this line
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int patternOffset;
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if (bits == 4)
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{
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patternOffset = ((tile & 0x3FFF) << 1) | ((tile >> 15) & 1);
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patternOffset *= 32;
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patternOffset /= 4;
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}
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else
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{
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patternOffset = tile & 0x3FFF;
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patternOffset *= 64;
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patternOffset /= 4;
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}
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// Name table entry provides high color bits
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uint32_t colorHi = tile & ((bits == 4) ? 0x7FF0 : 0x7F00);
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// Draw
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if (bits == 4)
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{
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uint32_t pattern = vram[patternOffset + patternLine];
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for (int p = 7; p >= 0; p--)
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{
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if (!clip || (clip && pixelOffset >= 0 && pixelOffset < 496))
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{
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uint16_t maskTest = 1 << (15-((pixelOffset+0)/32));
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bool visible = (mask & maskTest) != 0;
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uint32_t pixel = palette[((pattern >> (p*4)) & 0xF) | colorHi];
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if (alphaTest)
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{
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if (visible && (pixel >> 24) != 0) // only draw opaque pixels
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line[pixelOffset] = pixel;
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}
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else
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{
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if (visible)
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line[pixelOffset] = pixel;
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else
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line[pixelOffset] = 0;
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}
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}
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++pixelOffset;
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}
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}
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else
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{
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for (int i = 0; i < 2; i++) // 4 pixels per word
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{
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uint32_t pattern = vram[patternOffset + patternLine + i];
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for (int p = 3; p >= 0; p--)
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{
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if (!clip || (clip && pixelOffset >= 0 && pixelOffset < 496))
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{
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uint16_t maskTest = 1 << (15-((pixelOffset+0)/32));
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bool visible = (mask & maskTest) != 0;
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uint32_t pixel = palette[((pattern >> (p*8)) & 0xFF) | colorHi];
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if (alphaTest)
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{
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if (visible && (pixel >> 24) != 0)
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line[pixelOffset] = pixel;
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}
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else
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{
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if (visible)
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line[pixelOffset] = pixel;
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else
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line[pixelOffset] = 0; // transparent
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}
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}
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++pixelOffset;
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}
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}
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}
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}
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template <int bits, bool alphaTest>
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static void DrawLayer(uint32_t *pixels, int layerNum, const uint32_t *vram, const uint32_t *regs, const uint32_t *palette)
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{
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const uint16_t *nameTableBase = (const uint16_t *) &vram[(0xF8000 + layerNum * 0x2000) / 4];
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const uint16_t *hScrollTable = (const uint16_t *) &vram[(0xF6000 + layerNum * 0x400) / 4];
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bool lineScrollMode = (regs[0x60/4 + layerNum] & 0x8000) != 0;
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int hFullScroll = regs[0x60/4 + layerNum] & 0x3FF;
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int vScroll = (regs[0x60/4 + layerNum] >> 16) & 0x1FF;
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const uint16_t *maskTable = (const uint16_t *) &vram[0xF7000 / 4];
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if (layerNum < 2) // little endian: layers A and A' use second word in each pair
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maskTable += 1;
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// If mask bit is clear, alternate layer is shown. We want to test for non-
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// zero, so we flip the mask when drawing alternate layers (layers 1 and 3).
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const uint16_t maskPolarity = (layerNum & 1) ? 0xFFFF : 0x0000;
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uint32_t *line = pixels;
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for (int y = 0; y < 384; y++)
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{
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int hScroll = (lineScrollMode ? hScrollTable[y] : hFullScroll) & 0x1FF;
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int hTile = hScroll / 8;
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int hFine = hScroll & 7; // horizontal pixel offset within tile line
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int vFine = (y + vScroll) & 7; // vertical pixel offset within 8x8 tile
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const uint16_t *nameTable = &nameTableBase[(64 * ((y + vScroll) / 8)) & 0xFFF]; // clamp to 64x64 = 0x1000
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uint16_t mask = *maskTable ^ maskPolarity; // each bit covers 32 pixels
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int pixelOffset = -hFine;
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int extraTile = (hFine != 0) ? 1 : 0; // h-scrolling requires part of 63rd tile
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// First tile may be clipped
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int tx = 0;
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DrawTileLine<bits, alphaTest, true>(line, pixelOffset, nameTable[(hTile ^ 1) & 63], vFine, vram, palette, mask);
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++hTile;
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pixelOffset += 8;
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// Middle tiles will not be clipped
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for (tx = 1; tx < (62 - 1 + extraTile); tx++)
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{
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DrawTileLine<bits, alphaTest, false>(line, pixelOffset, nameTable[(hTile ^ 1) & 63], vFine, vram, palette, mask);
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++hTile;
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pixelOffset += 8;
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}
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// Last tile may be clipped
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DrawTileLine<bits, alphaTest, true>(line, pixelOffset, nameTable[(hTile ^ 1) & 63], vFine, vram, palette, mask);
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++hTile;
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pixelOffset += 8;
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// Advance one line
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maskTable += 2;
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line += 496;
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}
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}
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std::pair<bool, bool> CRender2D::DrawTilemaps(uint32_t *pixelsBottom, uint32_t *pixelsTop)
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{
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unsigned priority = (m_regs[0x20/4] >> 8) & 0xF;
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// Render bottom layers
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bool noBottomSurface = true;
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static const int bottomOrder[4] = { 3, 2, 1, 0 };
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for (int i = 0; i < 4; i++)
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{
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int layerNum = bottomOrder[i];
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bool is4Bit = (m_regs[0x20/4] & (1 << (12 + layerNum))) != 0;
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bool enabled = (m_regs[0x60/4 + layerNum] & 0x80000000) != 0;
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bool selected = (priority & (1 << layerNum)) == 0;
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if (enabled && selected)
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{
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if (noBottomSurface)
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{
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if (is4Bit)
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DrawLayer<4, false>(pixelsBottom, layerNum, m_vram, m_regs, m_palette[layerNum / 2]);
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else
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|
DrawLayer<8, false>(pixelsBottom, layerNum, m_vram, m_regs, m_palette[layerNum / 2]);
|
|
}
|
|
else
|
|
{
|
|
if (is4Bit)
|
|
DrawLayer<4, true>(pixelsBottom, layerNum, m_vram, m_regs, m_palette[layerNum / 2]);
|
|
else
|
|
DrawLayer<8, true>(pixelsBottom, layerNum, m_vram, m_regs, m_palette[layerNum / 2]);
|
|
}
|
|
noBottomSurface = false;
|
|
}
|
|
}
|
|
|
|
// Render top layers
|
|
// NOTE: layer ordering is different according to MAME (which has 3, 2, 0, 1
|
|
// for top layer). Until I see evidence that this is correct and not a typo,
|
|
// I will assume consistent layer ordering.
|
|
bool noTopSurface = true;
|
|
static const int topOrder[4] = { 3, 2, 1, 0 };
|
|
for (int i = 0; i < 4; i++)
|
|
{
|
|
int layerNum = topOrder[i];
|
|
bool is4Bit = (m_regs[0x20/4] & (1 << (12 + layerNum))) != 0;
|
|
bool enabled = (m_regs[0x60/4 + layerNum] & 0x80000000) != 0;
|
|
bool selected = (priority & (1 << layerNum)) != 0;
|
|
if (enabled && selected)
|
|
{
|
|
if (noTopSurface)
|
|
{
|
|
if (is4Bit)
|
|
DrawLayer<4, false>(pixelsTop, layerNum, m_vram, m_regs, m_palette[layerNum / 2]);
|
|
else
|
|
DrawLayer<8, false>(pixelsTop, layerNum, m_vram, m_regs, m_palette[layerNum / 2]);
|
|
}
|
|
else
|
|
{
|
|
if (is4Bit)
|
|
DrawLayer<4, true>(pixelsTop, layerNum, m_vram, m_regs, m_palette[layerNum / 2]);
|
|
else
|
|
DrawLayer<8, true>(pixelsTop, layerNum, m_vram, m_regs, m_palette[layerNum / 2]);
|
|
}
|
|
noTopSurface = false;
|
|
}
|
|
}
|
|
|
|
// Indicate whether top and bottom surfaces have to be rendered
|
|
return std::pair<bool, bool>(!noTopSurface, !noBottomSurface);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
Frame Display Functions
|
|
******************************************************************************/
|
|
|
|
// Draws a surface to the screen (0 is top and 1 is bottom)
|
|
void CRender2D::DisplaySurface(int surface)
|
|
{
|
|
// Draw the surface
|
|
glActiveTexture(GL_TEXTURE0); // texture unit 0
|
|
glBindTexture(GL_TEXTURE_2D, m_texID[surface]);
|
|
glBegin(GL_QUADS);
|
|
glTexCoord2f(0.0f, 0.0f); glVertex2f(0.0f, 0.0f);
|
|
glTexCoord2f(1.0f, 0.0f); glVertex2f(1.0f, 0.0f);
|
|
glTexCoord2f(1.0f, 1.0f); glVertex2f(1.0f, 1.0f);
|
|
glTexCoord2f(0.0f, 1.0f); glVertex2f(0.0f, 1.0f);
|
|
glEnd();
|
|
}
|
|
|
|
// Set up viewport and OpenGL state for 2D rendering (sets up blending function but disables blending)
|
|
void CRender2D::Setup2D(bool isBottom)
|
|
{
|
|
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // alpha of 1.0 is opaque, 0 is transparent
|
|
glDisable(GL_BLEND);
|
|
|
|
// Disable Z-buffering
|
|
glDisable(GL_DEPTH_TEST);
|
|
|
|
// Shader program
|
|
glUseProgram(m_shaderProgram);
|
|
|
|
// Clear everything if requested or just overscan areas for wide screen mode
|
|
if (isBottom)
|
|
{
|
|
glClearColor(0.0, 0.0, 0.0, 0.0);
|
|
glViewport(0, 0, m_totalXPixels, m_totalYPixels);
|
|
glDisable(GL_SCISSOR_TEST); // scissor is enabled to fix the 2d/3d miss match problem
|
|
glClear(GL_COLOR_BUFFER_BIT); // we want to clear outside the scissored areas so must disable it
|
|
glEnable(GL_SCISSOR_TEST);
|
|
}
|
|
|
|
// Set up the viewport and orthogonal projection
|
|
bool stretchBottom = m_config["WideBackground"].ValueAs<bool>() && isBottom;
|
|
if (!stretchBottom)
|
|
{
|
|
glViewport(m_xOffset - m_correction, m_yOffset + m_correction, m_xPixels, m_yPixels); //Preserve aspect ratio of tile layer by constraining and centering viewport
|
|
}
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glOrtho(0.0, 1.0, 1.0, 0.0, 1.0, -1.0);
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
}
|
|
|
|
void CRender2D::BeginFrame(void)
|
|
{
|
|
}
|
|
|
|
void CRender2D::PreRenderFrame(void)
|
|
{
|
|
// Update all layers
|
|
m_surfaces_present = DrawTilemaps(m_bottomSurface, m_topSurface);
|
|
glActiveTexture(GL_TEXTURE0); // texture unit 0
|
|
if (m_surfaces_present.first)
|
|
{
|
|
glBindTexture(GL_TEXTURE_2D, m_texID[0]);
|
|
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 496, 384, GL_RGBA, GL_UNSIGNED_BYTE, m_topSurface);
|
|
}
|
|
if (m_surfaces_present.second)
|
|
{
|
|
glBindTexture(GL_TEXTURE_2D, m_texID[1]);
|
|
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 496, 384, GL_RGBA, GL_UNSIGNED_BYTE, m_bottomSurface);
|
|
}
|
|
}
|
|
|
|
void CRender2D::RenderFrameBottom(void)
|
|
{
|
|
// Display bottom surface if anything was drawn there, else clear everything
|
|
Setup2D(true);
|
|
if (m_surfaces_present.second)
|
|
DisplaySurface(1);
|
|
}
|
|
|
|
void CRender2D::RenderFrameTop(void)
|
|
{
|
|
// Display top surface only if it exists
|
|
if (m_surfaces_present.first)
|
|
{
|
|
Setup2D(false);
|
|
glEnable(GL_BLEND);
|
|
DisplaySurface(0);
|
|
}
|
|
}
|
|
|
|
void CRender2D::EndFrame(void)
|
|
{
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
Emulation Callbacks
|
|
******************************************************************************/
|
|
|
|
// Deprecated
|
|
void CRender2D::WriteVRAM(unsigned addr, uint32_t data)
|
|
{
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
Configuration, Initialization, and Shutdown
|
|
******************************************************************************/
|
|
|
|
void CRender2D::AttachRegisters(const uint32_t *regPtr)
|
|
{
|
|
m_regs = regPtr;
|
|
DebugLog("Render2D attached registers\n");
|
|
}
|
|
|
|
void CRender2D::AttachPalette(const uint32_t *palPtr[2])
|
|
{
|
|
m_palette[0] = palPtr[0];
|
|
m_palette[1] = palPtr[1];
|
|
DebugLog("Render2D attached palette\n");
|
|
}
|
|
|
|
void CRender2D::AttachVRAM(const uint8_t *vramPtr)
|
|
{
|
|
m_vram = (uint32_t *) vramPtr;
|
|
DebugLog("Render2D attached VRAM\n");
|
|
}
|
|
|
|
// Memory pool and offsets within it
|
|
#define MEMORY_POOL_SIZE (2*512*384*4)
|
|
#define OFFSET_TOP_SURFACE 0 // 512*384*4 bytes
|
|
#define OFFSET_BOTTOM_SURFACE (512*384*4) // 512*384*4
|
|
|
|
bool CRender2D::Init(unsigned xOffset, unsigned yOffset, unsigned xRes, unsigned yRes, unsigned totalXRes, unsigned totalYRes)
|
|
{
|
|
// Load shaders
|
|
if (OKAY != LoadShaderProgram(&m_shaderProgram, &m_vertexShader, &m_fragmentShader, m_config["VertexShader2D"].ValueAs<std::string>(), m_config["FragmentShader2D"].ValueAs<std::string>(), s_vertexShaderSource, s_fragmentShaderSource))
|
|
return FAIL;
|
|
|
|
// Get locations of the uniforms
|
|
glUseProgram(m_shaderProgram); // bind program
|
|
m_textureMapLoc = glGetUniformLocation(m_shaderProgram, "textureMap");
|
|
glUniform1i(m_textureMapLoc, 0); // attach it to texture unit 0
|
|
|
|
// Allocate memory for layer surfaces
|
|
m_memoryPool = new(std::nothrow) uint8_t[MEMORY_POOL_SIZE];
|
|
if (NULL == m_memoryPool)
|
|
return ErrorLog("Insufficient memory for tilemap surfaces (need %1.1f MB).", float(MEMORY_POOL_SIZE) / 0x100000);
|
|
memset(m_memoryPool, 0, MEMORY_POOL_SIZE); // clear textures
|
|
|
|
// Set up pointers to memory regions
|
|
m_topSurface = (uint32_t *) &m_memoryPool[OFFSET_TOP_SURFACE];
|
|
m_bottomSurface = (uint32_t *) &m_memoryPool[OFFSET_BOTTOM_SURFACE];
|
|
|
|
// Resolution
|
|
m_xPixels = xRes;
|
|
m_yPixels = yRes;
|
|
m_xOffset = xOffset;
|
|
m_yOffset = yOffset;
|
|
m_totalXPixels = totalXRes;
|
|
m_totalYPixels = totalYRes;
|
|
m_correction = (UINT32)(((yRes / 384.f) * 2) + 0.5f); // for some reason the 2d layer is 2 pixels off the 3D
|
|
|
|
// Create textures
|
|
glActiveTexture(GL_TEXTURE0); // texture unit 0
|
|
glGenTextures(2, m_texID);
|
|
|
|
for (int i = 0; i < 2; i++)
|
|
{
|
|
glBindTexture(GL_TEXTURE_2D, m_texID[i]);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 496, 384, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
|
|
}
|
|
|
|
DebugLog("Render2D initialized (allocated %1.1f MB)\n", float(MEMORY_POOL_SIZE) / 0x100000);
|
|
return OKAY;
|
|
}
|
|
|
|
CRender2D::CRender2D(const Util::Config::Node &config)
|
|
: m_config(config)
|
|
{
|
|
DebugLog("Built Render2D\n");
|
|
}
|
|
|
|
CRender2D::~CRender2D(void)
|
|
{
|
|
DestroyShaderProgram(m_shaderProgram, m_vertexShader, m_fragmentShader);
|
|
glDeleteTextures(2, m_texID);
|
|
|
|
if (m_memoryPool)
|
|
{
|
|
delete [] m_memoryPool;
|
|
m_memoryPool = 0;
|
|
}
|
|
|
|
m_vram = 0;
|
|
m_topSurface = 0;
|
|
m_bottomSurface = 0;
|
|
|
|
DebugLog("Destroyed Render2D\n");
|
|
}
|