row-walk-drift.c

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/*
 
MIT License
 
Copyright (c) 2026 PCSX-Redux authors
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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*/
 
// Phase-20 row-walk-drift suite. Five triangles (K in {1, 3, 5, 8, 16})
// with identical 10x20 screen footprint. Six probes per K at x=7 and
// y in {5, 8, 11, 14, 17, 20}.
 
CESTER_BODY(
 
// Triangle T_LONG_K_N: A=(5,5)/(0,0) B=(15,5)/(N,0) C=(5,25)/(0,2N)
// dU/dx = N/10, dV/dy = N/10. Triangle is 10 wide, 20 tall. Right
// edge BC has slope -0.5; probes at x=7 are well to the left of BC
// at every probed y so row-start X stays at 5.
 
static void drawT_LONG_K01(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 24, 28);
    setTexpage(TEX17_TX, TEX17_TY, 2);
    setTextureWindow(0, 0, 0, 0);
    rasterTexTri(TEX_MOD_NEUTRAL,
                 5,  5,  0, 0,
                 15, 5,  1, 0,
                 5,  25, 0, 2,
                 TEX17_CLUT_FIELD, TEX17_TPAGE);
    rasterFlushPrimitive();
}
 
static void drawT_LONG_K03(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 24, 28);
    setTexpage(TEX17_TX, TEX17_TY, 2);
    setTextureWindow(0, 0, 0, 0);
    rasterTexTri(TEX_MOD_NEUTRAL,
                 5,  5,  0, 0,
                 15, 5,  3, 0,
                 5,  25, 0, 6,
                 TEX17_CLUT_FIELD, TEX17_TPAGE);
    rasterFlushPrimitive();
}
 
static void drawT_LONG_K05(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 24, 28);
    setTexpage(TEX17_TX, TEX17_TY, 2);
    setTextureWindow(0, 0, 0, 0);
    rasterTexTri(TEX_MOD_NEUTRAL,
                 5,  5,  0, 0,
                 15, 5,  5, 0,
                 5,  25, 0, 10,
                 TEX17_CLUT_FIELD, TEX17_TPAGE);
    rasterFlushPrimitive();
}
 
static void drawT_LONG_K08(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 24, 28);
    setTexpage(TEX17_TX, TEX17_TY, 2);
    setTextureWindow(0, 0, 0, 0);
    rasterTexTri(TEX_MOD_NEUTRAL,
                 5,  5,  0, 0,
                 15, 5,  8, 0,
                 5,  25, 0, 16,
                 TEX17_CLUT_FIELD, TEX17_TPAGE);
    rasterFlushPrimitive();
}
 
static void drawT_LONG_K16(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 24, 28);
    setTexpage(TEX17_TX, TEX17_TY, 2);
    setTextureWindow(0, 0, 0, 0);
    rasterTexTri(TEX_MOD_NEUTRAL,
                 5,  5,  0,  0,
                 15, 5,  16, 0,
                 5,  25, 0,  32,  /* 8-bit UV holds 32 cleanly; probes only reach v=24 */
                 TEX17_CLUT_FIELD, TEX17_TPAGE);
    rasterFlushPrimitive();
}
 
)  // CESTER_BODY
 
// --------------------------------------------------------------------------
// K=01 probes
// --------------------------------------------------------------------------
 
CESTER_TEST(ar_long_k01_y05, gpu_raster_phase20,
    drawT_LONG_K01();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K01_Y05, 7, 5);
)
 
CESTER_TEST(ar_long_k01_y08, gpu_raster_phase20,
    drawT_LONG_K01();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K01_Y08, 7, 8);
)
 
CESTER_TEST(ar_long_k01_y11, gpu_raster_phase20,
    drawT_LONG_K01();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K01_Y11, 7, 11);
)
 
CESTER_TEST(ar_long_k01_y14, gpu_raster_phase20,
    drawT_LONG_K01();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K01_Y14, 7, 14);
)
 
CESTER_TEST(ar_long_k01_y17, gpu_raster_phase20,
    drawT_LONG_K01();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K01_Y17, 7, 17);
)
 
CESTER_TEST(ar_long_k01_y20, gpu_raster_phase20,
    drawT_LONG_K01();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K01_Y20, 7, 20);
)
 
// --------------------------------------------------------------------------
// K=03 probes
// --------------------------------------------------------------------------
 
CESTER_TEST(ar_long_k03_y05, gpu_raster_phase20,
    drawT_LONG_K03();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K03_Y05, 7, 5);
)
 
CESTER_TEST(ar_long_k03_y08, gpu_raster_phase20,
    drawT_LONG_K03();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K03_Y08, 7, 8);
)
 
CESTER_TEST(ar_long_k03_y11, gpu_raster_phase20,
    drawT_LONG_K03();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K03_Y11, 7, 11);
)
 
CESTER_TEST(ar_long_k03_y14, gpu_raster_phase20,
    drawT_LONG_K03();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K03_Y14, 7, 14);
)
 
CESTER_TEST(ar_long_k03_y17, gpu_raster_phase20,
    drawT_LONG_K03();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K03_Y17, 7, 17);
)
 
CESTER_TEST(ar_long_k03_y20, gpu_raster_phase20,
    drawT_LONG_K03();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K03_Y20, 7, 20);
)
 
// --------------------------------------------------------------------------
// K=05 probes
// --------------------------------------------------------------------------
 
CESTER_TEST(ar_long_k05_y05, gpu_raster_phase20,
    drawT_LONG_K05();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K05_Y05, 7, 5);
)
 
CESTER_TEST(ar_long_k05_y08, gpu_raster_phase20,
    drawT_LONG_K05();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K05_Y08, 7, 8);
)
 
CESTER_TEST(ar_long_k05_y11, gpu_raster_phase20,
    drawT_LONG_K05();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K05_Y11, 7, 11);
)
 
CESTER_TEST(ar_long_k05_y14, gpu_raster_phase20,
    drawT_LONG_K05();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K05_Y14, 7, 14);
)
 
CESTER_TEST(ar_long_k05_y17, gpu_raster_phase20,
    drawT_LONG_K05();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K05_Y17, 7, 17);
)
 
CESTER_TEST(ar_long_k05_y20, gpu_raster_phase20,
    drawT_LONG_K05();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K05_Y20, 7, 20);
)
 
// --------------------------------------------------------------------------
// K=08 probes
// --------------------------------------------------------------------------
 
CESTER_TEST(ar_long_k08_y05, gpu_raster_phase20,
    drawT_LONG_K08();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K08_Y05, 7, 5);
)
 
CESTER_TEST(ar_long_k08_y08, gpu_raster_phase20,
    drawT_LONG_K08();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K08_Y08, 7, 8);
)
 
CESTER_TEST(ar_long_k08_y11, gpu_raster_phase20,
    drawT_LONG_K08();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K08_Y11, 7, 11);
)
 
CESTER_TEST(ar_long_k08_y14, gpu_raster_phase20,
    drawT_LONG_K08();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K08_Y14, 7, 14);
)
 
CESTER_TEST(ar_long_k08_y17, gpu_raster_phase20,
    drawT_LONG_K08();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K08_Y17, 7, 17);
)
 
CESTER_TEST(ar_long_k08_y20, gpu_raster_phase20,
    drawT_LONG_K08();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K08_Y20, 7, 20);
)
 
// --------------------------------------------------------------------------
// K=16 probes
// --------------------------------------------------------------------------
 
CESTER_TEST(ar_long_k16_y05, gpu_raster_phase20,
    drawT_LONG_K16();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K16_Y05, 7, 5);
)
 
CESTER_TEST(ar_long_k16_y08, gpu_raster_phase20,
    drawT_LONG_K16();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K16_Y08, 7, 8);
)
 
CESTER_TEST(ar_long_k16_y11, gpu_raster_phase20,
    drawT_LONG_K16();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K16_Y11, 7, 11);
)
 
CESTER_TEST(ar_long_k16_y14, gpu_raster_phase20,
    drawT_LONG_K16();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K16_Y14, 7, 14);
)
 
CESTER_TEST(ar_long_k16_y17, gpu_raster_phase20,
    drawT_LONG_K16();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K16_Y17, 7, 17);
)
 
CESTER_TEST(ar_long_k16_y20, gpu_raster_phase20,
    drawT_LONG_K16();
    PHASE17_ASSERT_PIXEL_EQ(EXPECT_LONG_K16_Y20, 7, 20);
)