/*
* Copyright (C) 2021 Collabora, Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "pan_util.h"
/* A test consists of a render target format, clear colour, dither state, and
* translated form. Dither state matters when the tilebuffer format is more
* precise than the final format. */
struct test {
enum pipe_format format;
bool dithered;
union pipe_color_union colour;
uint32_t packed[4];
};
#define RRRR(r) { r, r, r, r }
#define RGRG(r, g) { r, g, r, g }
#define F(r, g, b, a) { .f = { r, g, b, a } }
#define UI(r, g, b, a) { .ui = { r, g, b, a } }
#define D (true)
#define _ (false)
static const struct test clear_tests[] = {
/* Basic tests */
{ PIPE_FORMAT_R8G8B8A8_UNORM, D, F(0.0, 0.0, 0.0, 0.0), RRRR(0x00000000) },
{ PIPE_FORMAT_R8G8B8A8_UNORM, _, F(0.0, 0.0, 0.0, 0.0), RRRR(0x00000000) },
{ PIPE_FORMAT_R8G8B8A8_UNORM, D, F(1.0, 0.0, 0.0, 1.0), RRRR(0xFF0000FF) },
{ PIPE_FORMAT_R8G8B8A8_UNORM, _, F(1.0, 0.0, 0.0, 1.0), RRRR(0xFF0000FF) },
{ PIPE_FORMAT_B8G8R8A8_UNORM, D, F(1.0, 0.0, 0.0, 1.0), RRRR(0xFF0000FF) },
{ PIPE_FORMAT_B8G8R8A8_UNORM, _, F(1.0, 0.0, 0.0, 1.0), RRRR(0xFF0000FF) },
{ PIPE_FORMAT_R8G8B8A8_UNORM, D, F(0.664, 0.0, 0.0, 0.0), RRRR(0x000000A9) },
{ PIPE_FORMAT_R8G8B8A8_UNORM, _, F(0.664, 0.0, 0.0, 0.0), RRRR(0x000000A9) },
{ PIPE_FORMAT_R4G4B4A4_UNORM, D, F(0.664, 0.0, 0.0, 0.0), RRRR(0x0000009F) },
{ PIPE_FORMAT_R4G4B4A4_UNORM, _, F(0.664, 0.0, 0.0, 0.0), RRRR(0x000000A0) },
/* Test rounding to nearest even. The values are cherrypicked to multiply
* out to a fractional part of 0.5. The first test should round down and
* second test should round up. */
{ PIPE_FORMAT_R4G4B4A4_UNORM, D, F(0.41875, 0.0, 0.0, 1.0), RRRR(0xF0000064) },
{ PIPE_FORMAT_R4G4B4A4_UNORM, D, F(0.40625, 0.0, 0.0, 1.0), RRRR(0xF0000062) },
/* Testing rounding direction when dithering is disabled. The packed value
* is what gets rounded. This behaves as round-to-even with the cutoff point
* at 2^-m + 2^-n for an m:n representation. */
{ PIPE_FORMAT_R4G4B4A4_UNORM, _, F(0.03125, 0.0, 0.0, 1.0), RRRR(0xF0000000) },
{ PIPE_FORMAT_R4G4B4A4_UNORM, _, F(0.03125, 0.0, 0.0, 1.0), RRRR(0xF0000000) },
{ PIPE_FORMAT_R4G4B4A4_UNORM, _, F(0.03333, 0.0, 0.0, 1.0), RRRR(0xF0000000) },
{ PIPE_FORMAT_R4G4B4A4_UNORM, _, F(0.03334, 0.0, 0.0, 1.0), RRRR(0xF0000010) },
{ PIPE_FORMAT_R4G4B4A4_UNORM, _, F(0.09375, 0.0, 0.0, 1.0), RRRR(0xF0000010) },
/* Check all the special formats with different edge cases */
{ PIPE_FORMAT_R4G4B4A4_UNORM, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x7800F01E) },
{ PIPE_FORMAT_R5G5B5A1_UNORM, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x400F807E) },
{ PIPE_FORMAT_R5G6B5_UNORM, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x000FC07E) },
{ PIPE_FORMAT_R10G10B10A2_UNORM, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x800FFC82) },
{ PIPE_FORMAT_R8G8B8A8_SRGB, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x8000FF64) },
{ PIPE_FORMAT_R4G4B4A4_UNORM, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0xF0F02BAC) },
{ PIPE_FORMAT_R5G6B5_UNORM, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0x3E02D6C8) },
{ PIPE_FORMAT_R5G5B5A1_UNORM, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0xBE02CEC8) },
{ PIPE_FORMAT_R10G10B10A2_UNORM, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0xFFF2E2DF) },
{ PIPE_FORMAT_R8G8B8A8_SRGB, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0xFFFF76DC) },
/* Check that values are padded when dithering is disabled */
{ PIPE_FORMAT_R4G4B4A4_UNORM, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0xF0F030B0) },
{ PIPE_FORMAT_R5G6B5_UNORM, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0x3E02C2C0) },
{ PIPE_FORMAT_R5G5B5A1_UNORM, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0xBE0302C0) },
{ PIPE_FORMAT_R10G10B10A2_UNORM, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0xFFF2E2DF) },
{ PIPE_FORMAT_R8G8B8A8_SRGB, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0xFFFF76DC) },
/* Check that blendable tilebuffer values are invariant under swizzling */
{ PIPE_FORMAT_B4G4R4A4_UNORM, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x7800F01E) },
{ PIPE_FORMAT_B5G5R5A1_UNORM, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x400F807E) },
{ PIPE_FORMAT_B5G6R5_UNORM, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x000FC07E) },
{ PIPE_FORMAT_B10G10R10A2_UNORM, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x800FFC82) },
{ PIPE_FORMAT_B8G8R8A8_SRGB, D, F(0.127, 2.4, -1.0, 0.5), RRRR(0x8000FF64) },
{ PIPE_FORMAT_B4G4R4A4_UNORM, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0xF0F02BAC) },
{ PIPE_FORMAT_B5G6R5_UNORM, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0x3E02D6C8) },
{ PIPE_FORMAT_B5G5R5A1_UNORM, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0xBE02CEC8) },
{ PIPE_FORMAT_B10G10R10A2_UNORM, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0xFFF2E2DF) },
{ PIPE_FORMAT_B8G8R8A8_SRGB, D, F(0.718, 0.18, 1.0, 2.0), RRRR(0xFFFF76DC) },
{ PIPE_FORMAT_B4G4R4A4_UNORM, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0xF0F030B0) },
{ PIPE_FORMAT_B5G6R5_UNORM, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0x3E02C2C0) },
{ PIPE_FORMAT_B5G5R5A1_UNORM, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0xBE0302C0) },
{ PIPE_FORMAT_B10G10R10A2_UNORM, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0xFFF2E2DF) },
{ PIPE_FORMAT_B8G8R8A8_SRGB, _, F(0.718, 0.18, 1.0, 2.0), RRRR(0xFFFF76DC) },
/* Check raw formats, which are not invariant under swizzling. Raw formats
* cannot be dithered. */
{ PIPE_FORMAT_R8G8B8A8_UINT, D, UI(0xCA, 0xFE, 0xBA, 0xBE), RRRR(0xBEBAFECA) },
{ PIPE_FORMAT_R8G8B8A8_UINT, _, UI(0xCA, 0xFE, 0xBA, 0xBE), RRRR(0xBEBAFECA) },
{ PIPE_FORMAT_B8G8R8A8_UINT, D, UI(0xCA, 0xFE, 0xBA, 0xBE), RRRR(0xBECAFEBA) },
{ PIPE_FORMAT_B8G8R8A8_UINT, _, UI(0xCA, 0xFE, 0xBA, 0xBE), RRRR(0xBECAFEBA) },
/* Check that larger raw formats are replicated correctly */
{ PIPE_FORMAT_R16G16B16A16_UINT, D, UI(0xCAFE, 0xBABE, 0xABAD, 0x1DEA),
RGRG(0xBABECAFE, 0x1DEAABAD) },
{ PIPE_FORMAT_R16G16B16A16_UINT, _, UI(0xCAFE, 0xBABE, 0xABAD, 0x1DEA),
RGRG(0xBABECAFE, 0x1DEAABAD) },
{ PIPE_FORMAT_R32G32B32A32_UINT, D,
UI(0xCAFEBABE, 0xABAD1DEA, 0xDEADBEEF, 0xABCDEF01),
{ 0xCAFEBABE, 0xABAD1DEA, 0xDEADBEEF, 0xABCDEF01 } },
{ PIPE_FORMAT_R32G32B32A32_UINT, _,
UI(0xCAFEBABE, 0xABAD1DEA, 0xDEADBEEF, 0xABCDEF01),
{ 0xCAFEBABE, 0xABAD1DEA, 0xDEADBEEF, 0xABCDEF01 } },
};
#define ASSERT_EQ(x, y) do { \
if ((x[0] == y[0]) && (x[1] == y[1]) && (x[2] == y[2]) && (x[3] == y[3])) { \
nr_pass++; \
} else { \
nr_fail++; \
fprintf(stderr, "%s%s: Assertion failed %s (%08X %08X %08X %08X) != %s (%08X %08X %08X %08X)\n", \
util_format_short_name(T.format), T.dithered ? " dithered" : "", #x, x[0], x[1], x[2], x[3], #y, y[0], y[1], y[2], y[3]); \
} \
} while(0)
int main(int argc, const char **argv)
{
unsigned nr_pass = 0, nr_fail = 0;
for (unsigned i = 0; i < ARRAY_SIZE(clear_tests); ++i) {
struct test T = clear_tests[i];
uint32_t packed[4];
pan_pack_color(&packed[0], &T.colour, T.format, T.dithered);
ASSERT_EQ(T.packed, packed);
}
printf("Passed %u/%u\n", nr_pass, nr_pass + nr_fail);
return nr_fail ? 1 : 0;
}