tests/spec/gl-1.0/bitmap-heart-dance.c

   1 /*
   2  * Copyright (C) 2018 Laura Ekstrand
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * Test glBitmap in a methodical way using a series of heart shapes.
  26  * Heart shape is diagram A.2 from Garnstudio free sock pattern Heart Dance
  27  * (https://www.garnstudio.com/pattern.php?id=7440&cid=17).
  28  * Knitting color work is basically glBitmap for knits!
  29  *
  30  *       _ * _ _ _ * _ _        where  _ = 0
  31  *       * * * _ * * * _               * = 1
  32  *       * * * * * * * _
  33  *       * * * * * * * _
  34  *       _ * * * * * _ _
  35  *       _ _ * * * _ _ _
  36  *       _ _ _ * _ _ _ _
  37  *       _ _ _ _ _ _ _ _
  38  *
  39  * Or:                          Little end    Big end
  40  *       0 1 0 0 0 1 0 0         68   0x44     0x22
  41  *       1 1 1 0 1 1 1 0        238   0xEE     0x77
  42  *       1 1 1 1 1 1 1 0        254   0xFE     0xF7
  43  *       1 1 1 1 1 1 1 0        254   0xFE     0xF7
  44  *       0 1 1 1 1 1 0 0        124   0x7C     0xE3
  45  *       0 0 1 1 1 0 0 0         56   0x38     0xC2
  46  *       0 0 0 1 0 0 0 0         16   0x10     0x80
  47  *       0 0 0 0 0 0 0 0          0   0x00     0x00
  48  *
  49  * Laura Ekstrand
  50  * March 2018
  51  */
  52
  53 #include "piglit-util-gl.h"
  54
  55 PIGLIT_GL_TEST_CONFIG_BEGIN
  56         config.supports_gl_compat_version = 10;
  57         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE |
  58                                PIGLIT_GL_VISUAL_RGBA;
  59         config.window_width = 340;
  60         config.window_height = 200;
  61         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  62 PIGLIT_GL_TEST_CONFIG_END
  63
  64 static const float      red[4] = {0.502, 0.082, 0.082, 1.0};
  65 static const float   salmon[4] = {1.000, 0.353, 0.353, 1.0};
  66 static const float     pink[4] = {0.945, 0.471, 0.639, 1.0};
  67 static const float   orange[4] = {1.000, 0.286, 0.000, 1.0};
  68 static const float ltorange[4] = {1.000, 0.514, 0.322, 1.0};
  69 static const float   yellow[4] = {1.000, 0.871, 0.133, 1.0};
  70 static GLubyte bitmap[8] = { 0x00, 0x10, 0x38, 0x7C,
  71                              0xFE, 0xFE, 0xEE, 0x44 };
  72
  73 static const char *fragShaderText =
  74         "#version 130 \n"
  75         "uniform vec4      red; \n"
  76         "uniform vec4   salmon; \n"
  77         "uniform vec4     pink; \n"
  78         "uniform vec4   orange; \n"
  79         "uniform vec4 ltorange; \n"
  80         "uniform vec4   yellow; \n"
  81         "uniform int     xorig; \n"
  82         "uniform int     yorig; \n"
  83         "uniform int    length; \n"
  84         "uniform int       ysp; \n"
  85         "uniform int    height; \n"
  86         "uniform int  heart[8]; \n"
  87         "\n"
  88         "void main() \n"
  89         "{ \n"
  90         "    float zoom = 1.0; \n"
  91         "    vec4 black = vec4(0.0, 0.0, 0.0, 1.0); \n"
  92         "    int xsp = ysp + 8;  // Must be > 8. \n"
  93         "    vec2 fragCoord = gl_FragCoord.xy; \n"
  94         "    if ((fragCoord.x < xorig) || (fragCoord.y < height + yorig) ||\n"
  95         "        (fragCoord.x > xorig + ((length - 1) * xsp) + 8) || \n"
  96         "        (fragCoord.y > height + yorig + (5*ysp) + 8)) { \n"
  97         "        gl_FragColor = black; \n"
  98         "        return; \n"
  99         "    } \n"
 100         "    fragCoord = fragCoord/zoom; \n"
 101         "    int i = int(fragCoord.y - yorig - height) % ysp; \n"
 102         "    int pointmask = i < 8 ? heart[i] : 0; \n"
 103         "    int j = int(fragCoord.x - xorig) % xsp; \n"
 104         "    if (j > 8) { \n"
 105         "      j = 0; \n"
 106         "    } \n"
 107         "    for (int r = 0; r < j; r++) { \n"
 108         "      pointmask = pointmask/2; //left shift. \n"
 109         "    } \n"
 110         "    if (pointmask % 2 == 1) { \n"
 111         "        int c = (int(fragCoord.y - height - yorig) / ysp) % 6; \n"
 112         "        switch (c) { \n"
 113         "           case 0: \n"
 114         "             gl_FragColor = yellow; \n"
 115         "             break; \n"
 116         "           case 1: \n"
 117         "             gl_FragColor = ltorange; \n"
 118         "             break; \n"
 119         "           case 2: \n"
 120         "             gl_FragColor = orange; \n"
 121         "             break; \n"
 122         "           case 3: \n"
 123         "             gl_FragColor = pink; \n"
 124         "             break; \n"
 125         "           case 4: \n"
 126         "             gl_FragColor = salmon; \n"
 127         "             break; \n"
 128         "           case 5: \n"
 129         "             gl_FragColor = red; \n"
 130         "             break; \n"
 131         "        } \n"
 132         "    } else { \n"
 133         "        gl_FragColor = black; \n"
 134         "    } \n"
 135         "} \n";
 136
 137
 138 static void
 139 draw_row(const float* color, int length,
 140          int x, int y, int spacex) {
 141         glColor4fv(color);
 142         glRasterPos2f(x, y);
 143         for (int i = 0; i < length; i++) {
 144                 /* A line of hearts. */
 145                 glBitmap(8, 8, 0, 0, 8 + spacex, 0, bitmap);
 146         }
 147 }
 148
 149 static bool
 150 check_row(const float *color, int length, int x, int y, int spacex)
 151 {
 152         bool pass = true;
 153         for (int i = 0; i < length; i++) {
 154                 int probe_x = x + 8 + spacex + 4;
 155                 int probe_y = y + 4;
 156                 pass &= piglit_probe_pixel_rgb(probe_x, probe_y, color);
 157         }
 158         return pass;
 159 }
 160
 161 static GLuint fragShader, program;
 162
 163 enum piglit_result
 164 piglit_display(void)
 165 {
 166         /* Draw with glBitmap */
 167         bool pass = true;
 168         int length = 17;
 169         int x = 20;
 170         int y = 30;
 171         int spacing = 10;
 172
 173         glUseProgram(0);
 174
 175         glPixelStorei(GL_UNPACK_LSB_FIRST, GL_TRUE);
 176         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 177
 178         glViewport(0, 0, piglit_width, piglit_height);
 179         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 180
 181         glClear(GL_COLOR_BUFFER_BIT);
 182         draw_row(     red, length, x, y + 5*spacing, spacing);
 183         draw_row(  salmon, length, x, y + 4*spacing, spacing);
 184         draw_row(    pink, length, x, y + 3*spacing, spacing);
 185         draw_row(  orange, length, x, y + 2*spacing, spacing);
 186         draw_row(ltorange, length, x, y + 1*spacing, spacing);
 187         draw_row(  yellow, length, x, y + 0*spacing, spacing);
 188
 189         glUseProgram(program);
 190
 191         /*
 192          * Upload heart pattern. glBitmap is a bit mysterious in its bit
 193          * interpretation, and GLSL doesn't have ubyte.
 194          */
 195         int heart[8];
 196         for (int i = 0; i < 8; i++) {
 197                 heart[i] = (int) bitmap[i];
 198         }
 199         glUniform1iv(glGetUniformLocation(program, "heart"), 8, heart);
 200
 201         /* Load Colors. */
 202         glUniform4fv(glGetUniformLocation(program, "red"),      1, red);
 203         glUniform4fv(glGetUniformLocation(program, "salmon"),   1, salmon);
 204         glUniform4fv(glGetUniformLocation(program, "pink"),     1, pink);
 205         glUniform4fv(glGetUniformLocation(program, "orange"),   1, orange);
 206         glUniform4fv(glGetUniformLocation(program, "ltorange"), 1, ltorange);
 207         glUniform4fv(glGetUniformLocation(program, "yellow"),   1, yellow);
 208
 209         /* Load spacing. */
 210         glUniform1i(glGetUniformLocation(program, "xorig"), x);
 211         glUniform1i(glGetUniformLocation(program, "yorig"), y);
 212         glUniform1i(glGetUniformLocation(program, "length"), length);
 213         glUniform1i(glGetUniformLocation(program, "ysp"), spacing);
 214
 215         /* Draw shader in top half. */
 216         glUniform1i(glGetUniformLocation(program, "height"), piglit_height/2);
 217         piglit_draw_rect(0, piglit_height/2, piglit_width, piglit_height/2);
 218
 219         piglit_present_results();
 220
 221         pass &= check_row(     red, length, x, y + 5*spacing, spacing);
 222         pass &= check_row(  salmon, length, x, y + 4*spacing, spacing);
 223         pass &= check_row(    pink, length, x, y + 3*spacing, spacing);
 224         pass &= check_row(  orange, length, x, y + 2*spacing, spacing);
 225         pass &= check_row(ltorange, length, x, y + 1*spacing, spacing);
 226         pass &= check_row(  yellow, length, x, y + 0*spacing, spacing);
 227
 228         pass &= piglit_probe_rects_equal(0, 0, 0, piglit_height/2,
 229                                          piglit_width, piglit_height/2, GL_RGB);
 230
 231         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 232 }
 233
 234 void
 235 piglit_init(int argc, char **argv)
 236 {
 237         fragShader = piglit_compile_shader_text(GL_FRAGMENT_SHADER,
 238                                                 fragShaderText);
 239         program = piglit_link_simple_program(0, fragShader);
 240 }