mirror of
https://github.com/italicsjenga/agb.git
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241 lines
6.9 KiB
C
241 lines
6.9 KiB
C
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/* Copyright (c) 2013-2015 Jeffrey Pfau
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GBA_VIDEO_H
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#define GBA_VIDEO_H
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#include <mgba-util/common.h>
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CXX_GUARD_START
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#include <mgba/core/log.h>
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#include <mgba/core/timing.h>
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#include <mgba/gba/interface.h>
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mLOG_DECLARE_CATEGORY(GBA_VIDEO);
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enum {
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VIDEO_HBLANK_PIXELS = 68,
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VIDEO_HDRAW_LENGTH = 960,
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VIDEO_HBLANK_LENGTH = 272,
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VIDEO_HBLANK_FLIP = 46,
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VIDEO_HORIZONTAL_LENGTH = 1232,
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VIDEO_VBLANK_PIXELS = 68,
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VIDEO_VERTICAL_TOTAL_PIXELS = 228,
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VIDEO_TOTAL_LENGTH = 280896,
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OBJ_HBLANK_FREE_LENGTH = 954,
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OBJ_LENGTH = 1210,
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BASE_TILE = 0x00010000
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};
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enum GBAVideoObjMode {
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OBJ_MODE_NORMAL = 0,
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OBJ_MODE_SEMITRANSPARENT = 1,
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OBJ_MODE_OBJWIN = 2
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};
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enum GBAVideoObjShape {
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OBJ_SHAPE_SQUARE = 0,
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OBJ_SHAPE_HORIZONTAL = 1,
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OBJ_SHAPE_VERTICAL = 2
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};
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enum GBAVideoBlendEffect {
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BLEND_NONE = 0,
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BLEND_ALPHA = 1,
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BLEND_BRIGHTEN = 2,
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BLEND_DARKEN = 3
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};
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DECL_BITFIELD(GBAObjAttributesA, uint16_t);
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DECL_BITS(GBAObjAttributesA, Y, 0, 8);
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DECL_BIT(GBAObjAttributesA, Transformed, 8);
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DECL_BIT(GBAObjAttributesA, Disable, 9);
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DECL_BIT(GBAObjAttributesA, DoubleSize, 9);
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DECL_BITS(GBAObjAttributesA, Mode, 10, 2);
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DECL_BIT(GBAObjAttributesA, Mosaic, 12);
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DECL_BIT(GBAObjAttributesA, 256Color, 13);
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DECL_BITS(GBAObjAttributesA, Shape, 14, 2);
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DECL_BITFIELD(GBAObjAttributesB, uint16_t);
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DECL_BITS(GBAObjAttributesB, X, 0, 9);
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DECL_BITS(GBAObjAttributesB, MatIndex, 9, 5);
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DECL_BIT(GBAObjAttributesB, HFlip, 12);
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DECL_BIT(GBAObjAttributesB, VFlip, 13);
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DECL_BITS(GBAObjAttributesB, Size, 14, 2);
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DECL_BITFIELD(GBAObjAttributesC, uint16_t);
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DECL_BITS(GBAObjAttributesC, Tile, 0, 10);
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DECL_BITS(GBAObjAttributesC, Priority, 10, 2);
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DECL_BITS(GBAObjAttributesC, Palette, 12, 4);
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struct GBAObj {
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GBAObjAttributesA a;
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GBAObjAttributesB b;
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GBAObjAttributesC c;
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uint16_t d;
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};
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struct GBAOAMMatrix {
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int16_t padding0[3];
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int16_t a;
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int16_t padding1[3];
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int16_t b;
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int16_t padding2[3];
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int16_t c;
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int16_t padding3[3];
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int16_t d;
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};
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union GBAOAM {
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struct GBAObj obj[128];
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struct GBAOAMMatrix mat[32];
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uint16_t raw[512];
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};
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struct GBAVideoWindowRegion {
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uint8_t end;
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uint8_t start;
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};
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#define GBA_TEXT_MAP_TILE(MAP) ((MAP) & 0x03FF)
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#define GBA_TEXT_MAP_HFLIP(MAP) ((MAP) & 0x0400)
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#define GBA_TEXT_MAP_VFLIP(MAP) ((MAP) & 0x0800)
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#define GBA_TEXT_MAP_PALETTE(MAP) (((MAP) & 0xF000) >> 12)
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DECL_BITFIELD(GBARegisterDISPCNT, uint16_t);
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DECL_BITS(GBARegisterDISPCNT, Mode, 0, 3);
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DECL_BIT(GBARegisterDISPCNT, Cgb, 3);
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DECL_BIT(GBARegisterDISPCNT, FrameSelect, 4);
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DECL_BIT(GBARegisterDISPCNT, HblankIntervalFree, 5);
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DECL_BIT(GBARegisterDISPCNT, ObjCharacterMapping, 6);
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DECL_BIT(GBARegisterDISPCNT, ForcedBlank, 7);
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DECL_BIT(GBARegisterDISPCNT, Bg0Enable, 8);
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DECL_BIT(GBARegisterDISPCNT, Bg1Enable, 9);
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DECL_BIT(GBARegisterDISPCNT, Bg2Enable, 10);
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DECL_BIT(GBARegisterDISPCNT, Bg3Enable, 11);
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DECL_BIT(GBARegisterDISPCNT, ObjEnable, 12);
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DECL_BIT(GBARegisterDISPCNT, Win0Enable, 13);
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DECL_BIT(GBARegisterDISPCNT, Win1Enable, 14);
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DECL_BIT(GBARegisterDISPCNT, ObjwinEnable, 15);
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DECL_BITFIELD(GBARegisterDISPSTAT, uint16_t);
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DECL_BIT(GBARegisterDISPSTAT, InVblank, 0);
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DECL_BIT(GBARegisterDISPSTAT, InHblank, 1);
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DECL_BIT(GBARegisterDISPSTAT, Vcounter, 2);
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DECL_BIT(GBARegisterDISPSTAT, VblankIRQ, 3);
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DECL_BIT(GBARegisterDISPSTAT, HblankIRQ, 4);
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DECL_BIT(GBARegisterDISPSTAT, VcounterIRQ, 5);
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DECL_BITS(GBARegisterDISPSTAT, VcountSetting, 8, 8);
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DECL_BITFIELD(GBARegisterBGCNT, uint16_t);
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DECL_BITS(GBARegisterBGCNT, Priority, 0, 2);
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DECL_BITS(GBARegisterBGCNT, CharBase, 2, 2);
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DECL_BIT(GBARegisterBGCNT, Mosaic, 6);
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DECL_BIT(GBARegisterBGCNT, 256Color, 7);
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DECL_BITS(GBARegisterBGCNT, ScreenBase, 8, 5);
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DECL_BIT(GBARegisterBGCNT, Overflow, 13);
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DECL_BITS(GBARegisterBGCNT, Size, 14, 2);
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DECL_BITFIELD(GBARegisterBLDCNT, uint16_t);
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DECL_BIT(GBARegisterBLDCNT, Target1Bg0, 0);
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DECL_BIT(GBARegisterBLDCNT, Target1Bg1, 1);
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DECL_BIT(GBARegisterBLDCNT, Target1Bg2, 2);
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DECL_BIT(GBARegisterBLDCNT, Target1Bg3, 3);
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DECL_BIT(GBARegisterBLDCNT, Target1Obj, 4);
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DECL_BIT(GBARegisterBLDCNT, Target1Bd, 5);
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DECL_BITS(GBARegisterBLDCNT, Effect, 6, 2);
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DECL_BIT(GBARegisterBLDCNT, Target2Bg0, 8);
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DECL_BIT(GBARegisterBLDCNT, Target2Bg1, 9);
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DECL_BIT(GBARegisterBLDCNT, Target2Bg2, 10);
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DECL_BIT(GBARegisterBLDCNT, Target2Bg3, 11);
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DECL_BIT(GBARegisterBLDCNT, Target2Obj, 12);
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DECL_BIT(GBARegisterBLDCNT, Target2Bd, 13);
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DECL_BITFIELD(GBAWindowControl, uint8_t);
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DECL_BIT(GBAWindowControl, Bg0Enable, 0);
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DECL_BIT(GBAWindowControl, Bg1Enable, 1);
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DECL_BIT(GBAWindowControl, Bg2Enable, 2);
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DECL_BIT(GBAWindowControl, Bg3Enable, 3);
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DECL_BIT(GBAWindowControl, ObjEnable, 4);
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DECL_BIT(GBAWindowControl, BlendEnable, 5);
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DECL_BITFIELD(GBAMosaicControl, uint16_t);
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DECL_BITS(GBAMosaicControl, BgH, 0, 4);
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DECL_BITS(GBAMosaicControl, BgV, 4, 4);
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DECL_BITS(GBAMosaicControl, ObjH, 8, 4);
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DECL_BITS(GBAMosaicControl, ObjV, 12, 4);
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struct GBAVideoRenderer {
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void (*init)(struct GBAVideoRenderer* renderer);
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void (*reset)(struct GBAVideoRenderer* renderer);
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void (*deinit)(struct GBAVideoRenderer* renderer);
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uint16_t (*writeVideoRegister)(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
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void (*writeVRAM)(struct GBAVideoRenderer* renderer, uint32_t address);
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void (*writePalette)(struct GBAVideoRenderer* renderer, uint32_t address, uint16_t value);
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void (*writeOAM)(struct GBAVideoRenderer* renderer, uint32_t oam);
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void (*drawScanline)(struct GBAVideoRenderer* renderer, int y);
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void (*finishFrame)(struct GBAVideoRenderer* renderer);
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void (*getPixels)(struct GBAVideoRenderer* renderer, size_t* stride, const void** pixels);
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void (*putPixels)(struct GBAVideoRenderer* renderer, size_t stride, const void* pixels);
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uint16_t* palette;
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uint16_t* vram;
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union GBAOAM* oam;
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struct mCacheSet* cache;
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bool disableBG[4];
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bool disableOBJ;
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bool disableWIN[2];
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bool disableOBJWIN;
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bool highlightBG[4];
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bool highlightOBJ[128];
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color_t highlightColor;
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uint8_t highlightAmount;
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};
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struct GBAVideo {
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struct GBA* p;
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struct GBAVideoRenderer* renderer;
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struct mTimingEvent event;
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int vcount;
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int shouldStall;
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uint16_t palette[512];
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uint16_t* vram;
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union GBAOAM oam;
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int32_t frameCounter;
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int frameskip;
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int frameskipCounter;
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};
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void GBAVideoInit(struct GBAVideo* video);
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void GBAVideoReset(struct GBAVideo* video);
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void GBAVideoDeinit(struct GBAVideo* video);
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void GBAVideoDummyRendererCreate(struct GBAVideoRenderer*);
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void GBAVideoAssociateRenderer(struct GBAVideo* video, struct GBAVideoRenderer* renderer);
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void GBAVideoWriteDISPSTAT(struct GBAVideo* video, uint16_t value);
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struct GBASerializedState;
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void GBAVideoSerialize(const struct GBAVideo* video, struct GBASerializedState* state);
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void GBAVideoDeserialize(struct GBAVideo* video, const struct GBASerializedState* state);
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extern MGBA_EXPORT const int GBAVideoObjSizes[16][2];
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CXX_GUARD_END
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#endif
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