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standalone_srgb_antialiasing
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monitor calibration test block

main
Allen Webster 2023-04-28 19:22:32 -07:00
parent 853659870b
commit c18b773a01
1 changed files with 79 additions and 3 deletions
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76
src/standalone_srgb_antialiasing_experiments.c
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@ -732,6 +732,10 @@ static GLuint circle25_texture = 0;
static GLuint circle125_texture = 0;
#define CALIBRATION_SIDE 120
static GLuint calibration_texture = 0;
static void
opengl_render_init(void){
//- setup basic shader program
@ -919,6 +923,50 @@ opengl_render_init(void){
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
//- calibration texture
{
U8 buf[CALIBRATION_SIDE*CALIBRATION_SIDE] = {0};
// checkerboards
for (U32 x = 0; x < (CALIBRATION_SIDE/2); x += 1){
for (U32 y = 0; y < (CALIBRATION_SIDE/2); y += 1){
B32 b = (((x + y)&1) == 1);
U8 c = b?255:0;
buf[x + y*CALIBRATION_SIDE] = c;
buf[x + (CALIBRATION_SIDE/2) + (y + (CALIBRATION_SIDE/2))*CALIBRATION_SIDE] = c;
}
}
// (1/2) gray srgb
for (U32 x = 0; x < (CALIBRATION_SIDE/2); x += 1){
for (U32 y = 0; y < (CALIBRATION_SIDE/2); y += 1){
buf[x + (CALIBRATION_SIDE/2) + y*CALIBRATION_SIDE] = 128;
}
}
// (1/2) gray linear
for (U32 x = 0; x < (CALIBRATION_SIDE/2); x += 1){
for (U32 y = 0; y < (CALIBRATION_SIDE/2); y += 1){
buf[x + (y + (CALIBRATION_SIDE/2))*CALIBRATION_SIDE] = 186;
}
}
U8 img[CALIBRATION_SIDE*CALIBRATION_SIDE*3] = {0};
for (U32 i = 0; i < CALIBRATION_SIDE*CALIBRATION_SIDE; i += 1){
U8 c = buf[i];
img[i*3 + 0] = c;
img[i*3 + 1] = c;
img[i*3 + 2] = c;
}
glGenTextures(1, &calibration_texture);
glBindTexture(GL_TEXTURE_2D, calibration_texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, CALIBRATION_SIDE, CALIBRATION_SIDE, 0,
GL_RGB, GL_UNSIGNED_BYTE, img);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
//- check for setup errors
if (glGetError() != 0){
error_message("error in opengl renderer initialization");
@ -1091,6 +1139,9 @@ WinMain(HINSTANCE hInstance,
F32 test7_y = graphics_h - 480.f;
F32 test8_y = graphics_h - 800.f;
F32 calib_y = graphics_h - 10.f;
F32 calib_x = 10.f;
// render to canvas frame buffer
{
glBindFramebuffer(GL_FRAMEBUFFER, canvas_framebuffer);
@ -1593,6 +1644,31 @@ WinMain(HINSTANCE hInstance,
}
}
}
// 9: color calibration blocks
if (test_idx == 0){
F32 y1 = calib_y;
F32 y0 = calib_y - CALIBRATION_SIDE;
F32 x0 = calib_x;
F32 x1 = calib_x + CALIBRATION_SIDE;
Vertex v[6];
v[0].px = x0; v[0].py = y0;
v[0].uvx = 0.f; v[0].uvy = 0.f;
v[1].px = x0; v[1].py = y1;
v[1].uvx = 0.f; v[1].uvy = 1.f;
v[2].px = x1; v[2].py = y0;
v[2].uvx = 1.f; v[2].uvy = 0.f;
v[3].px = x0; v[3].py = y1;
v[3].uvx = 0.f; v[3].uvy = 1.f;
v[4].px = x1; v[4].py = y0;
v[4].uvx = 1.f; v[4].uvy = 0.f;
v[5].px = x1; v[5].py = y1;
v[5].uvx = 1.f; v[5].uvy = 1.f;
opengl_draw_texture_geometry(v, 6, calibration_texture);
}
}
}