1 #include <cstdint>
2 #include <cstdio>
3 #include <cstdlib>
4 #include <array>
5 #include <memory>
6
7 #include <gtest/gtest.h>
8
9 #include "GL/osmesa.h"
10 #include "util/macros.h"
11 #include "util/u_endian.h"
12 #include "util/u_math.h"
13
14 typedef struct {
15 unsigned format;
16 GLenum type;
17 int bpp;
18 uint64_t expected;
19 } Params;
20
21 class OSMesaRenderTestFixture : public testing::TestWithParam<Params> {};
22
23 std::string
name_params(const testing::TestParamInfo<Params> params)24 name_params(const testing::TestParamInfo<Params> params) {
25 auto p = params.param;
26 std::string first, second;
27 switch (p.format) {
28 case OSMESA_RGBA:
29 first = "rgba";
30 break;
31 case OSMESA_BGRA:
32 first = "bgra";
33 break;
34 case OSMESA_RGB:
35 first = "rgb";
36 break;
37 case OSMESA_RGB_565:
38 first = "rgb_565";
39 break;
40 case OSMESA_ARGB:
41 first = "argb";
42 break;
43 }
44
45 switch (p.type) {
46 case GL_UNSIGNED_SHORT:
47 second = "unsigned_short";
48 break;
49 case GL_UNSIGNED_BYTE:
50 second = "unsigned_byte";
51 break;
52 case GL_FLOAT:
53 second = "float";
54 break;
55 case GL_UNSIGNED_SHORT_5_6_5:
56 second = "unsigned_short_565";
57 break;
58 }
59
60 return first + "_" + second;
61 };
62
TEST_P(OSMesaRenderTestFixture,Render)63 TEST_P(OSMesaRenderTestFixture, Render)
64 {
65 auto p = GetParam();
66 const int w = 2, h = 2;
67 uint8_t pixels[w * h * 8] = { 0 };
68
69 std::unique_ptr<osmesa_context, decltype(&OSMesaDestroyContext)> ctx{
70 OSMesaCreateContext(p.format, NULL), &OSMesaDestroyContext};
71 ASSERT_TRUE(ctx);
72
73 auto ret = OSMesaMakeCurrent(ctx.get(), &pixels, p.type, w, h);
74 ASSERT_EQ(ret, GL_TRUE);
75
76 glClearColor(0.25, 1.0, 0.5, 0.75);
77
78 uint64_t expected = p.expected;
79
80 /* All the formats other than 565 and RGB/byte are array formats, but our
81 * expected values are packed, so byte swap appropriately.
82 */
83 if (UTIL_ARCH_BIG_ENDIAN) {
84 switch (p.bpp) {
85 case 8:
86 expected = util_bswap64(expected);
87 break;
88
89 case 4:
90 expected = util_bswap32(expected);
91 break;
92
93 case 3:
94 case 2:
95 break;
96 }
97 }
98
99 glClear(GL_COLOR_BUFFER_BIT);
100 glFinish();
101
102 #if 0 /* XXX */
103 for (unsigned i = 0; i < ARRAY_SIZE(pixels); i += 4) {
104 fprintf(stderr, "pixel %d: %02x %02x %02x %02x\n",
105 i / 4,
106 pixels[i + 0],
107 pixels[i + 1],
108 pixels[i + 2],
109 pixels[i + 3]);
110 }
111 #endif
112
113 for (unsigned i = 0; i < w * h; i++) {
114 switch (p.bpp) {
115 case 2: {
116 uint16_t color = 0;
117 memcpy(&color, &pixels[i * p.bpp], p.bpp);
118 ASSERT_EQ(expected, color);
119 break;
120 }
121
122 case 3: {
123 uint32_t color = ((pixels[i * p.bpp + 0] << 0) |
124 (pixels[i * p.bpp + 1] << 8) |
125 (pixels[i * p.bpp + 2] << 16));
126 ASSERT_EQ(expected, color);
127 break;
128 }
129
130 case 4: {
131 uint32_t color = 0;
132 memcpy(&color, &pixels[i * p.bpp], p.bpp);
133 ASSERT_EQ(expected, color);
134 break;
135 }
136
137 case 8: {
138 uint64_t color = 0;
139 memcpy(&color, &pixels[i * p.bpp], p.bpp);
140 ASSERT_EQ(expected, color);
141 break;
142 }
143
144 default:
145 unreachable("bad bpp");
146 }
147 }
148 }
149
150 INSTANTIATE_TEST_CASE_P(
151 OSMesaRenderTest,
152 OSMesaRenderTestFixture,
153 testing::Values(
154 Params{ OSMESA_RGBA, GL_UNSIGNED_BYTE, 4, 0xbf80ff40 },
155 Params{ OSMESA_BGRA, GL_UNSIGNED_BYTE, 4, 0xbf40ff80 },
156 Params{ OSMESA_ARGB, GL_UNSIGNED_BYTE, 4, 0x80ff40bf},
157 Params{ OSMESA_RGB, GL_UNSIGNED_BYTE, 3, 0x80ff40 },
158 Params{ OSMESA_RGBA, GL_UNSIGNED_SHORT, 8, 0xbfff8000ffff4000ull },
159 Params{ OSMESA_RGB_565, GL_UNSIGNED_SHORT_5_6_5, 2, ((0x10 << 0) |
160 (0x3f << 5) |
161 (0x8 << 11)) }
162 ),
163 name_params
164 );
165