1/* Copyright (c) 2013-2017 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#ifndef DS_GX_SOFTWARE_H
  7#define DS_GX_SOFTWARE_H
  8
  9#include <mgba-util/common.h>
 10
 11CXX_GUARD_START
 12
 13#include <mgba/internal/ds/gx.h>
 14#include <mgba/internal/ds/video.h>
 15#include <mgba-util/table.h>
 16#include <mgba-util/vector.h>
 17
 18struct DSGXSoftwarePolygon {
 19	struct DSGXPolygon* poly;
 20	unsigned polyId;
 21	uint16_t* texBase;
 22	uint16_t* palBase;
 23	int texFormat;
 24	int blendFormat;
 25	int texW;
 26	int texH;
 27	int minY;
 28	int maxY;
 29};
 30
 31struct DSGXSoftwareEdge {
 32	unsigned polyId;
 33	int32_t y0; // 20.12
 34	int32_t x0; // 20.12
 35	int32_t z0; // 20.12
 36	int32_t w0; // 20.12
 37	uint8_t cr0;
 38	uint8_t cg0;
 39	uint8_t cb0;
 40	int16_t s0;
 41	int16_t t0;
 42
 43	int32_t y1; // 20.12
 44	int32_t x1; // 20.12
 45	int32_t z1; // 20.12
 46	int32_t w1; // 20.12
 47	uint8_t cr1;
 48	uint8_t cg1;
 49	uint8_t cb1;
 50	int16_t s1;
 51	int16_t t1;
 52};
 53
 54struct DSGXSoftwareEndpoint {
 55	int32_t coord[4]; // 20.12
 56	int64_t wRecip;
 57	uint8_t cr;
 58	uint8_t cg;
 59	uint8_t cb;
 60	int16_t s;
 61	int16_t t;
 62
 63	int64_t stepZ;
 64	int64_t stepW;
 65	int64_t stepR;
 66	int64_t stepG;
 67	int64_t stepB;
 68	int64_t stepS;
 69	int64_t stepT;
 70};
 71
 72struct DSGXSoftwareSpan {
 73	struct DSGXSoftwarePolygon* poly;
 74	int polyId;
 75	struct DSGXSoftwareEndpoint ep[2];
 76	struct DSGXSoftwareEndpoint step;
 77};
 78
 79DECLARE_VECTOR(DSGXSoftwarePolygonList, struct DSGXSoftwarePolygon);
 80DECLARE_VECTOR(DSGXSoftwareEdgeList, struct DSGXSoftwareEdge);
 81
 82struct DSGXSoftwareRenderer {
 83	struct DSGXRenderer d;
 84
 85	struct DSGXSoftwarePolygonList activePolys;
 86	struct DSGXSoftwareEdgeList activeEdges;
 87
 88	int32_t* depthBuffer;
 89	uint8_t* stencilBuffer;
 90	color_t* scanlineCache;
 91	int sort;
 92
 93	struct DSGXVertex* verts;
 94};
 95
 96void DSGXSoftwareRendererCreate(struct DSGXSoftwareRenderer* renderer);
 97
 98CXX_GUARD_END
 99
100#endif