triangle-edges.c

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/*
 
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*/
 
// Triangle-edges suite for the gpu-raster test binary.
//
// This file is #included from gpu-raster.c (cester is single-TU). It uses
// helpers defined in raster-helpers.h and expected-value macros defined in
// raster-expected.h, both of which gpu-raster.c includes before pulling in
// this file.
//
// Each CESTER_TEST is one pixel-of-interest. Tests are self-contained: they
// reset the GPU, fill the test region with the sentinel, draw the triangle
// under test, and read back exactly one pixel. cester reports failures as
// "expected X, received Y at file:line" and the ASSERT_PIXEL_EQ macro also
// emits an OBS line so a hardware capture run produces a complete log
// independent of cester's pass/fail accounting.
 
// --------------------------------------------------------------------------
// Per-triangle draw helpers
// --------------------------------------------------------------------------
//
// All static helpers must be wrapped in CESTER_BODY(...) because cester
// re-#includes __BASE_FILE__ multiple times during its forward-declaration
// + array-build + function-body passes. CESTER_BODY's expansion is empty
// on the early passes and contains its argument only on the final pass,
// so a static helper inside CESTER_BODY is defined exactly once. See
// cop0/cester-cop0.c for the canonical pattern.
 
CESTER_BODY(
 
// Triangle A: 4x4 right-angle, vertices (0,0),(4,0),(0,4), color RED.
static void rasterDrawTriA(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 16, 16);
    rasterFlatTri(RASTER_CMD_RED, 0, 0, 4, 0, 0, 4);
    rasterFlushPrimitive();
}
 
// Triangle B: 1-pixel degenerate at near corner, (0,0),(1,0),(0,1), RED.
static void rasterDrawTriB(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 4, 4);
    rasterFlatTri(RASTER_CMD_RED, 0, 0, 1, 0, 0, 1);
    rasterFlushPrimitive();
}
 
// Triangle C: 1-pixel degenerate at far corner.
static void rasterDrawTriC(void) {
    rasterReset();
    rasterClearTestRegion(1016, 504, 8, 8);
    rasterFlatTri(RASTER_CMD_BLUE, 1019, 507, 1020, 507, 1019, 508);
    rasterFlushPrimitive();
}
 
// Triangle D: vertical-right-edge, (0,0),(4,0),(4,4), GREEN.
static void rasterDrawTriD(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 16, 16);
    rasterFlatTri(RASTER_CMD_GREEN, 0, 0, 4, 0, 4, 4);
    rasterFlushPrimitive();
}
 
// Triangle E: horizontal-top-edge isoceles, (0,0),(4,0),(2,4), RED.
static void rasterDrawTriE(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 16, 16);
    rasterFlatTri(RASTER_CMD_RED, 0, 0, 4, 0, 2, 4);
    rasterFlushPrimitive();
}
 
// Triangle F: collinear-diagonal, (0,0),(2,2),(4,4), WHITE.
static void rasterDrawTriF(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 16, 16);
    rasterFlatTri(RASTER_CMD_WHITE, 0, 0, 2, 2, 4, 4);
    rasterFlushPrimitive();
}
 
// Triangle G: collinear-horizontal, (0,0),(10,0),(5,0), WHITE.
static void rasterDrawTriG(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 16, 8);
    rasterFlatTri(RASTER_CMD_WHITE, 0, 0, 10, 0, 5, 0);
    rasterFlushPrimitive();
}
 
// Triangle H: collinear-vertical, (0,0),(0,10),(0,5), WHITE.
static void rasterDrawTriH(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 8, 16);
    rasterFlatTri(RASTER_CMD_WHITE, 0, 0, 0, 10, 0, 5);
    rasterFlushPrimitive();
}
 
// Triangle I: xmax==xmin single-pixel span at top. (0,0),(2,1),(0,2), WHITE.
// This is the audit's soft.cc:2547/2593 critical case: the top row of this
// triangle has the right-edge xmax equal to xmin (single-pixel span). Soft
// renderer fast path keeps the pixel; slow path drops it.
static void rasterDrawTriI(void) {
    rasterReset();
    rasterClearTestRegion(0, 0, 8, 8);
    rasterFlatTri(RASTER_CMD_WHITE, 0, 0, 2, 1, 0, 2);
    rasterFlushPrimitive();
}
 
)  // CESTER_BODY
 
// --------------------------------------------------------------------------
// Triangle A: 4x4 right-angle - full interior + complement
// --------------------------------------------------------------------------
 
CESTER_TEST(triA_pixel_0_0, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_0_0, 0, 0);
)
 
CESTER_TEST(triA_pixel_1_0, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_1_0, 1, 0);
)
 
CESTER_TEST(triA_pixel_2_0, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_2_0, 2, 0);
)
 
CESTER_TEST(triA_pixel_3_0, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_3_0, 3, 0);
)
 
CESTER_TEST(triA_pixel_4_0_right_edge, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_4_0, 4, 0);
)
 
CESTER_TEST(triA_pixel_0_1, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_0_1, 0, 1);
)
 
CESTER_TEST(triA_pixel_2_1, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_2_1, 2, 1);
)
 
CESTER_TEST(triA_pixel_3_1_hypotenuse, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_3_1, 3, 1);
)
 
CESTER_TEST(triA_pixel_1_2, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_1_2, 1, 2);
)
 
CESTER_TEST(triA_pixel_2_2_hypotenuse, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_2_2, 2, 2);
)
 
CESTER_TEST(triA_pixel_0_3, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_0_3, 0, 3);
)
 
CESTER_TEST(triA_pixel_1_3_hypotenuse, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_1_3, 1, 3);
)
 
CESTER_TEST(triA_pixel_0_4_bottom_edge, gpu_raster_phase1,
    rasterDrawTriA();
    ASSERT_PIXEL_EQ(EXPECT_TRI_A_PIXEL_0_4, 0, 4);
)
 
// --------------------------------------------------------------------------
// Triangle B: 1-pixel degenerate at near corner
// --------------------------------------------------------------------------
 
CESTER_TEST(triB_pixel_0_0, gpu_raster_phase1,
    rasterDrawTriB();
    ASSERT_PIXEL_EQ(EXPECT_TRI_B_PIXEL_0_0, 0, 0);
)
 
CESTER_TEST(triB_pixel_1_0, gpu_raster_phase1,
    rasterDrawTriB();
    ASSERT_PIXEL_EQ(EXPECT_TRI_B_PIXEL_1_0, 1, 0);
)
 
CESTER_TEST(triB_pixel_0_1, gpu_raster_phase1,
    rasterDrawTriB();
    ASSERT_PIXEL_EQ(EXPECT_TRI_B_PIXEL_0_1, 0, 1);
)
 
CESTER_TEST(triB_pixel_1_1, gpu_raster_phase1,
    rasterDrawTriB();
    ASSERT_PIXEL_EQ(EXPECT_TRI_B_PIXEL_1_1, 1, 1);
)
 
// --------------------------------------------------------------------------
// Triangle C: 1-pixel degenerate at far corner of draw area
// --------------------------------------------------------------------------
 
CESTER_TEST(triC_pixel_1019_507, gpu_raster_phase1,
    rasterDrawTriC();
    ASSERT_PIXEL_EQ(EXPECT_TRI_C_PIXEL_1019_507, 1019, 507);
)
 
CESTER_TEST(triC_pixel_1020_507, gpu_raster_phase1,
    rasterDrawTriC();
    ASSERT_PIXEL_EQ(EXPECT_TRI_C_PIXEL_1020_507, 1020, 507);
)
 
CESTER_TEST(triC_pixel_1019_508, gpu_raster_phase1,
    rasterDrawTriC();
    ASSERT_PIXEL_EQ(EXPECT_TRI_C_PIXEL_1019_508, 1019, 508);
)
 
CESTER_TEST(triC_pixel_1020_508, gpu_raster_phase1,
    rasterDrawTriC();
    ASSERT_PIXEL_EQ(EXPECT_TRI_C_PIXEL_1020_508, 1020, 508);
)
 
// --------------------------------------------------------------------------
// Triangle D: vertical right edge - tests right-edge inclusion
// --------------------------------------------------------------------------
 
CESTER_TEST(triD_pixel_0_0_top_left, gpu_raster_phase1,
    rasterDrawTriD();
    ASSERT_PIXEL_EQ(EXPECT_TRI_D_PIXEL_0_0, 0, 0);
)
 
CESTER_TEST(triD_pixel_3_0_top_inner, gpu_raster_phase1,
    rasterDrawTriD();
    ASSERT_PIXEL_EQ(EXPECT_TRI_D_PIXEL_3_0, 3, 0);
)
 
CESTER_TEST(triD_pixel_4_0_top_right_corner, gpu_raster_phase1,
    rasterDrawTriD();
    ASSERT_PIXEL_EQ(EXPECT_TRI_D_PIXEL_4_0, 4, 0);
)
 
CESTER_TEST(triD_pixel_0_1_left_of_diag, gpu_raster_phase1,
    rasterDrawTriD();
    ASSERT_PIXEL_EQ(EXPECT_TRI_D_PIXEL_0_1, 0, 1);
)
 
CESTER_TEST(triD_pixel_1_1, gpu_raster_phase1,
    rasterDrawTriD();
    ASSERT_PIXEL_EQ(EXPECT_TRI_D_PIXEL_1_1, 1, 1);
)
 
CESTER_TEST(triD_pixel_3_1, gpu_raster_phase1,
    rasterDrawTriD();
    ASSERT_PIXEL_EQ(EXPECT_TRI_D_PIXEL_3_1, 3, 1);
)
 
CESTER_TEST(triD_pixel_4_1_right_edge, gpu_raster_phase1,
    rasterDrawTriD();
    ASSERT_PIXEL_EQ(EXPECT_TRI_D_PIXEL_4_1, 4, 1);
)
 
CESTER_TEST(triD_pixel_3_3_bottom_right_interior, gpu_raster_phase1,
    rasterDrawTriD();
    ASSERT_PIXEL_EQ(EXPECT_TRI_D_PIXEL_3_3, 3, 3);
)
 
CESTER_TEST(triD_pixel_4_4_bottom_right_vertex, gpu_raster_phase1,
    rasterDrawTriD();
    ASSERT_PIXEL_EQ(EXPECT_TRI_D_PIXEL_4_4, 4, 4);
)
 
// --------------------------------------------------------------------------
// Triangle E: horizontal top edge - tests top-edge inclusion
// --------------------------------------------------------------------------
 
CESTER_TEST(triE_pixel_0_0_top_left_of_top, gpu_raster_phase1,
    rasterDrawTriE();
    ASSERT_PIXEL_EQ(EXPECT_TRI_E_PIXEL_0_0, 0, 0);
)
 
CESTER_TEST(triE_pixel_3_0_top_inner, gpu_raster_phase1,
    rasterDrawTriE();
    ASSERT_PIXEL_EQ(EXPECT_TRI_E_PIXEL_3_0, 3, 0);
)
 
CESTER_TEST(triE_pixel_4_0_top_right_vertex, gpu_raster_phase1,
    rasterDrawTriE();
    ASSERT_PIXEL_EQ(EXPECT_TRI_E_PIXEL_4_0, 4, 0);
)
 
CESTER_TEST(triE_pixel_1_1, gpu_raster_phase1,
    rasterDrawTriE();
    ASSERT_PIXEL_EQ(EXPECT_TRI_E_PIXEL_1_1, 1, 1);
)
 
CESTER_TEST(triE_pixel_3_1, gpu_raster_phase1,
    rasterDrawTriE();
    ASSERT_PIXEL_EQ(EXPECT_TRI_E_PIXEL_3_1, 3, 1);
)
 
CESTER_TEST(triE_pixel_2_2_center, gpu_raster_phase1,
    rasterDrawTriE();
    ASSERT_PIXEL_EQ(EXPECT_TRI_E_PIXEL_2_2, 2, 2);
)
 
CESTER_TEST(triE_pixel_2_3_near_apex, gpu_raster_phase1,
    rasterDrawTriE();
    ASSERT_PIXEL_EQ(EXPECT_TRI_E_PIXEL_2_3, 2, 3);
)
 
CESTER_TEST(triE_pixel_2_4_apex, gpu_raster_phase1,
    rasterDrawTriE();
    ASSERT_PIXEL_EQ(EXPECT_TRI_E_PIXEL_2_4, 2, 4);
)
 
// --------------------------------------------------------------------------
// Triangle F: collinear-diagonal - expects zero fill
// --------------------------------------------------------------------------
 
CESTER_TEST(triF_collinear_diag_pixel_0_0, gpu_raster_phase1,
    rasterDrawTriF();
    ASSERT_PIXEL_EQ(EXPECT_TRI_F_PIXEL_0_0, 0, 0);
)
 
CESTER_TEST(triF_collinear_diag_pixel_1_1, gpu_raster_phase1,
    rasterDrawTriF();
    ASSERT_PIXEL_EQ(EXPECT_TRI_F_PIXEL_1_1, 1, 1);
)
 
CESTER_TEST(triF_collinear_diag_pixel_2_2, gpu_raster_phase1,
    rasterDrawTriF();
    ASSERT_PIXEL_EQ(EXPECT_TRI_F_PIXEL_2_2, 2, 2);
)
 
CESTER_TEST(triF_collinear_diag_pixel_4_4, gpu_raster_phase1,
    rasterDrawTriF();
    ASSERT_PIXEL_EQ(EXPECT_TRI_F_PIXEL_4_4, 4, 4);
)
 
// --------------------------------------------------------------------------
// Triangle G: collinear-horizontal - expects zero fill
// --------------------------------------------------------------------------
 
CESTER_TEST(triG_collinear_horiz_pixel_0_0, gpu_raster_phase1,
    rasterDrawTriG();
    ASSERT_PIXEL_EQ(EXPECT_TRI_G_PIXEL_0_0, 0, 0);
)
 
CESTER_TEST(triG_collinear_horiz_pixel_5_0, gpu_raster_phase1,
    rasterDrawTriG();
    ASSERT_PIXEL_EQ(EXPECT_TRI_G_PIXEL_5_0, 5, 0);
)
 
CESTER_TEST(triG_collinear_horiz_pixel_10_0, gpu_raster_phase1,
    rasterDrawTriG();
    ASSERT_PIXEL_EQ(EXPECT_TRI_G_PIXEL_10_0, 10, 0);
)
 
// --------------------------------------------------------------------------
// Triangle H: collinear-vertical - expects zero fill
// --------------------------------------------------------------------------
 
CESTER_TEST(triH_collinear_vert_pixel_0_0, gpu_raster_phase1,
    rasterDrawTriH();
    ASSERT_PIXEL_EQ(EXPECT_TRI_H_PIXEL_0_0, 0, 0);
)
 
CESTER_TEST(triH_collinear_vert_pixel_0_5, gpu_raster_phase1,
    rasterDrawTriH();
    ASSERT_PIXEL_EQ(EXPECT_TRI_H_PIXEL_0_5, 0, 5);
)
 
CESTER_TEST(triH_collinear_vert_pixel_0_10, gpu_raster_phase1,
    rasterDrawTriH();
    ASSERT_PIXEL_EQ(EXPECT_TRI_H_PIXEL_0_10, 0, 10);
)
 
// --------------------------------------------------------------------------
// Triangle I: xmax==xmin top row - CRITICAL audit case (soft.cc:2547/2593)
// --------------------------------------------------------------------------
 
CESTER_TEST(triI_xmax_eq_xmin_pixel_0_0, gpu_raster_phase1,
    rasterDrawTriI();
    ASSERT_PIXEL_EQ(EXPECT_TRI_I_PIXEL_0_0, 0, 0);
)
 
CESTER_TEST(triI_xmax_eq_xmin_pixel_1_0, gpu_raster_phase1,
    rasterDrawTriI();
    ASSERT_PIXEL_EQ(EXPECT_TRI_I_PIXEL_1_0, 1, 0);
)
 
CESTER_TEST(triI_xmax_eq_xmin_pixel_0_1, gpu_raster_phase1,
    rasterDrawTriI();
    ASSERT_PIXEL_EQ(EXPECT_TRI_I_PIXEL_0_1, 0, 1);
)
 
CESTER_TEST(triI_xmax_eq_xmin_pixel_1_1, gpu_raster_phase1,
    rasterDrawTriI();
    ASSERT_PIXEL_EQ(EXPECT_TRI_I_PIXEL_1_1, 1, 1);
)
 
CESTER_TEST(triI_xmax_eq_xmin_pixel_0_2_bottom_excluded, gpu_raster_phase1,
    rasterDrawTriI();
    ASSERT_PIXEL_EQ(EXPECT_TRI_I_PIXEL_0_2, 0, 2);
)