/*
 * Trigger multiple sampler views for the same texture resource.

 */

#include "piglit-util-gl.h"

PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_core_version = 33;
config.window_width = 64;
config.window_height = 64;
PIGLIT_GL_TEST_CONFIG_END

static GLuint tex, prog;
GLuint sampler_decode;
GLuint sampler_skip;

static const char *vs =
"#version 330\n"
"in vec4 piglit_vertex;"
"void main(){ gl_Position = piglit_vertex; }";

static const char *fs =
"#version 330\n"
"uniform sampler2D t0;\n"
"uniform sampler2D t1;\n"
"out vec4 c;\n"
"void main(){\n"
"    vec4 a = texture(t0, vec2(0.5));\n"
"    vec4 b = texture(t1, vec2(0.5));\n"
"    c = mix(a, b, 0.5);\n"
"}";

void piglit_init(int argc, char **argv)
{
    prog = piglit_build_simple_program(vs, fs);
    glUseProgram(prog);

    glUniform1i(glGetUniformLocation(prog, "t0"), 0);
    glUniform1i(glGetUniformLocation(prog, "t1"), 1);

    glGenSamplers(1, &sampler_decode);
    glSamplerParameteri(sampler_decode,
                        GL_TEXTURE_SRGB_DECODE_EXT,
                        GL_DECODE_EXT);

    glGenSamplers(1, &sampler_skip);
    glSamplerParameteri(sampler_skip,
                        GL_TEXTURE_SRGB_DECODE_EXT,
                        GL_SKIP_DECODE_EXT);

    /* create texture A */
    glGenTextures(1, &tex);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, tex);
    glBindSampler(0, sampler_decode);

    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, tex);
    glBindSampler(1, sampler_skip);

    uint32_t px = 0xff00ffff;

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8,
                 1, 1, 0,
                 GL_RGBA, GL_UNSIGNED_BYTE,
                 &px);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    glBindTexture(GL_TEXTURE_2D, tex);
}

enum piglit_result piglit_display(void)
{
    glClear(GL_COLOR_BUFFER_BIT);

    /* draw */
    piglit_draw_rect(-1, -1, 2, 1);

    piglit_present_results();
    return PIGLIT_PASS;
}