// Test that invalid IDs in CopySubTexture are validated
TEST_P(CopyTextureTest, CopySubTextureInvalidTextureIds)
{
if (!checkExtensions())
{
return;
}
glBindTexture(GL_TEXTURE_2D, mTextures[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
glBindTexture(GL_TEXTURE_2D, mTextures[1]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 3, 3, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
glCopySubTextureCHROMIUM(mTextures[0], 99993, 1, 1, 0, 0, 1, 1, false, false, false);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
glCopySubTextureCHROMIUM(99994, mTextures[1], 1, 1, 0, 0, 1, 1, false, false, false);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
glCopySubTextureCHROMIUM(99995, 99996, 1, 1, 0, 0, 1, 1, false, false, false);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
glCopySubTextureCHROMIUM(mTextures[0], mTextures[1], 1, 1, 0, 0, 1, 1, false, false, false);
EXPECT_GL_NO_ERROR();
}
// Verify that GL_BIND_GENERATES_RESOURCE_CHROMIUM can be queried but not changed
TEST_P(BindGeneratesResourceTest, QueryValidation)
{
GLint intValue = 2;
glGetIntegerv(GL_BIND_GENERATES_RESOURCE_CHROMIUM, &intValue);
EXPECT_GL_NO_ERROR();
EXPECT_GL_FALSE(intValue);
float floatValue = 2.0f;
glGetFloatv(GL_BIND_GENERATES_RESOURCE_CHROMIUM, &floatValue);
EXPECT_GL_NO_ERROR();
EXPECT_EQ(floatValue, 0.0f);
GLboolean boolValue = GL_TRUE;
glGetBooleanv(GL_BIND_GENERATES_RESOURCE_CHROMIUM, &boolValue);
EXPECT_GL_NO_ERROR();
EXPECT_GL_FALSE(boolValue);
boolValue = glIsEnabled(GL_BIND_GENERATES_RESOURCE_CHROMIUM);
EXPECT_GL_NO_ERROR();
EXPECT_GL_FALSE(boolValue);
glEnable(GL_BIND_GENERATES_RESOURCE_CHROMIUM);
EXPECT_GL_ERROR(GL_INVALID_ENUM);
glDisable(GL_BIND_GENERATES_RESOURCE_CHROMIUM);
EXPECT_GL_ERROR(GL_INVALID_ENUM);
}
// Test validation of texture IDs
TEST_P(CopyCompressedTextureTest, InvalidTextureIds)
{
if (!checkExtensions())
{
return;
}
glBindTexture(GL_TEXTURE_2D, mTextures[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glCompressedTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0,
sizeof(CompressedImageDXT1), CompressedImageDXT1);
ASSERT_GL_NO_ERROR();
glBindTexture(GL_TEXTURE_2D, mTextures[1]);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
ASSERT_GL_NO_ERROR();
glCompressedCopyTextureCHROMIUM(mTextures[0], 99993);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
glCompressedCopyTextureCHROMIUM(99994, mTextures[1]);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
glCompressedCopyTextureCHROMIUM(99995, 99996);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
glCompressedCopyTextureCHROMIUM(mTextures[0], mTextures[1]);
EXPECT_GL_NO_ERROR();
}
TEST_F(SRGBTextureTest, srgba_validation)
{
bool supported = extensionEnabled("GL_EXT_sRGB") || getClientVersion() == 3;
GLuint tex = 0;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
GLubyte pixel[4] = { 0 };
glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB_ALPHA_EXT, 1, 1, 0, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE, pixel);
if (supported)
{
EXPECT_GL_NO_ERROR();
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE, pixel);
EXPECT_GL_NO_ERROR();
glGenerateMipmap(GL_TEXTURE_2D);
if (getClientVersion() == 2)
{
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
}
else
{
EXPECT_GL_NO_ERROR();
}
}
else
{
EXPECT_GL_ERROR(GL_INVALID_ENUM);
}
glDeleteTextures(1, &tex);
}
// Test that invalid dimensions in CopySubTexture are validated
TEST_P(CopyTextureTest, CopySubTextureDimension)
{
if (!checkExtensions())
{
return;
}
glBindTexture(GL_TEXTURE_2D, mTextures[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
glBindTexture(GL_TEXTURE_2D, mTextures[1]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 3, 3, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
glCopySubTextureCHROMIUM(mTextures[0], mTextures[1], 1, 1, 0, 0, 1, 1, false, false, false);
EXPECT_GL_NO_ERROR();
// xoffset < 0
glCopySubTextureCHROMIUM(mTextures[0], mTextures[1], -1, 1, 0, 0, 1, 1, false, false, false);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
// x < 0
glCopySubTextureCHROMIUM(mTextures[0], mTextures[1], 1, 1, -1, 0, 1, 1, false, false, false);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
// xoffset + width > dest_width
glCopySubTextureCHROMIUM(mTextures[0], mTextures[1], 2, 2, 0, 0, 2, 2, false, false, false);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
// x + width > source_width
glCopySubTextureCHROMIUM(mTextures[0], mTextures[1], 0, 0, 1, 1, 2, 2, false, false, false);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
}
// Test the destination texture cannot be immutable
TEST_P(CopyCompressedTextureTest, Immutable)
{
if (!checkExtensions() || getClientMajorVersion() < 3)
{
return;
}
glBindTexture(GL_TEXTURE_2D, mTextures[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glCompressedTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0,
sizeof(CompressedImageDXT1), CompressedImageDXT1);
ASSERT_GL_NO_ERROR();
glBindTexture(GL_TEXTURE_2D, mTextures[1]);
glTexStorage2D(GL_TEXTURE_2D, 1, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
ASSERT_GL_NO_ERROR();
glCompressedCopyTextureCHROMIUM(mTextures[0], mTextures[1]);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
}
// Test that only 2D textures are valid
TEST_P(CopyCompressedTextureTest, BindingPoints)
{
if (!checkExtensions())
{
return;
}
glBindTexture(GL_TEXTURE_CUBE_MAP, mTextures[0]);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
for (GLenum face = GL_TEXTURE_CUBE_MAP_POSITIVE_X; face <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
face++)
{
glCompressedTexImage2D(face, 0, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 4, 4, 0,
sizeof(CompressedImageDXT1), CompressedImageDXT1);
}
ASSERT_GL_NO_ERROR();
glBindTexture(GL_TEXTURE_CUBE_MAP, mTextures[1]);
glTexParameterf(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
ASSERT_GL_NO_ERROR();
glCompressedCopyTextureCHROMIUM(mTextures[0], mTextures[1]);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
}
// Test that uncompressed textures generate errors when copying
TEST_P(CopyCompressedTextureTest, InternalFormatNotSupported)
{
if (!checkExtensions())
{
return;
}
glBindTexture(GL_TEXTURE_2D, mTextures[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &GLColor::red);
ASSERT_GL_NO_ERROR();
glBindTexture(GL_TEXTURE_2D, mTextures[1]);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
ASSERT_GL_NO_ERROR();
// Check that the GL_RGBA format reports an error.
glCompressedCopyTextureCHROMIUM(mTextures[0], mTextures[1]);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
}
// Test that textures cannot be generated on bind
TEST_P(BindGeneratesResourceTest, Textures)
{
glBindTexture(GL_TEXTURE_2D, 2);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
glBindTexture(GL_TEXTURE_2D, 0);
EXPECT_GL_NO_ERROR();
}
// Test that renderbuffer cannot be generated on bind
TEST_P(BindGeneratesResourceTest, Renderbuffers)
{
glBindRenderbuffer(GL_RENDERBUFFER, 2);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
EXPECT_GL_NO_ERROR();
}
// Test that framebuffers cannot be generated on bind
TEST_P(BindGeneratesResourceTest, Framebuffers)
{
glBindFramebuffer(GL_FRAMEBUFFER, 2);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
EXPECT_GL_NO_ERROR();
}
TEST_F(SRGBTextureTest, srgba_renderbuffer)
{
bool supported = extensionEnabled("GL_EXT_sRGB") || getClientVersion() == 3;
GLuint rbo = 0;
glGenRenderbuffers(1, &rbo);
glBindRenderbuffer(GL_RENDERBUFFER, rbo);
glRenderbufferStorage(GL_RENDERBUFFER, GL_SRGB8_ALPHA8_EXT, 1, 1);
if (supported)
{
EXPECT_GL_NO_ERROR();
}
else
{
EXPECT_GL_ERROR(GL_INVALID_ENUM);
// Make sure the rbo has a size for future tests
glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8_OES, 1, 1);
EXPECT_GL_NO_ERROR();
}
GLuint fbo = 0;
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, rbo);
EXPECT_GL_NO_ERROR();
GLint colorEncoding = 0;
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT, &colorEncoding);
if (supported)
{
EXPECT_GL_NO_ERROR();
EXPECT_EQ(GL_SRGB_EXT, colorEncoding);
}
else
{
EXPECT_GL_ERROR(GL_INVALID_ENUM);
}
glDeleteFramebuffers(1, &fbo);
glDeleteRenderbuffers(1, &rbo);
}
// Test to ensure that the destination texture is redefined if the properties are different.
TEST_P(CopyTextureTest, RedefineDestinationTexture)
{
if (!checkExtensions())
{
return;
}
GLColor pixels[4] = {GLColor::red, GLColor::red, GLColor::red, GLColor::red};
glBindTexture(GL_TEXTURE_2D, mTextures[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
glBindTexture(GL_TEXTURE_2D, mTextures[1]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_BGRA_EXT, 1, 1, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
EXPECT_GL_NO_ERROR();
// GL_INVALID_OPERATION due to "intrinsic format" != "internal format".
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
// GL_INVALID_VALUE due to bad dimensions.
glTexSubImage2D(GL_TEXTURE_2D, 0, 1, 1, 1, 1, GL_BGRA_EXT, GL_UNSIGNED_BYTE, pixels);
EXPECT_GL_ERROR(GL_INVALID_VALUE);
// If the dest texture has different properties, glCopyTextureCHROMIUM()
// redefines them.
glCopyTextureCHROMIUM(mTextures[0], mTextures[1], GL_RGBA, GL_UNSIGNED_BYTE, false, false,
false);
EXPECT_GL_NO_ERROR();
// glTexSubImage2D() succeeds because mTextures[1] is redefined into 2x2
// dimension and GL_RGBA format.
glBindTexture(GL_TEXTURE_2D, mTextures[1]);
glTexSubImage2D(GL_TEXTURE_2D, 0, 1, 1, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
EXPECT_GL_NO_ERROR();
// Check that FB is complete.
EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
EXPECT_PIXEL_COLOR_EQ(1, 1, pixels[3]);
EXPECT_GL_NO_ERROR();
}
// Check that invalid internal formats return errors.
TEST_P(CopyTextureTest, InternalFormatNotSupported)
{
if (!checkExtensions())
{
return;
}
glBindTexture(GL_TEXTURE_2D, mTextures[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
EXPECT_GL_NO_ERROR();
std::vector<GLint> unsupportedDestFormats;
unsupportedDestFormats.push_back(GL_ALPHA);
unsupportedDestFormats.push_back(GL_LUMINANCE);
unsupportedDestFormats.push_back(GL_LUMINANCE_ALPHA);
if (!extensionEnabled("GL_EXT_texture_format_BGRA8888"))
{
unsupportedDestFormats.push_back(GL_BGRA_EXT);
}
// Check unsupported format reports an error.
for (GLint unsupportedDestFormat : unsupportedDestFormats)
{
glCopyTextureCHROMIUM(mTextures[0], mTextures[1], unsupportedDestFormat, GL_UNSIGNED_BYTE,
false, false, false);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
}
for (GLint unsupportedDestFormat : unsupportedDestFormats)
{
glBindTexture(GL_TEXTURE_2D, mTextures[1]);
glTexImage2D(GL_TEXTURE_2D, 0, unsupportedDestFormat, 1, 1, 0, unsupportedDestFormat,
GL_UNSIGNED_BYTE, nullptr);
glCopySubTextureCHROMIUM(mTextures[0], mTextures[1], 0, 0, 0, 0, 1, 1, false, false, false);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
}
}
// Test that buffers cannot be generated on bind
TEST_P(BindGeneratesResourceTest, Buffers)
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 2);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
EXPECT_GL_NO_ERROR();
if (getClientMajorVersion() >= 3)
{
glBindBufferBase(GL_UNIFORM_BUFFER, 0, 3);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
glBindBufferBase(GL_UNIFORM_BUFFER, 0, 0);
EXPECT_GL_NO_ERROR();
glBindBufferRange(GL_UNIFORM_BUFFER, 0, 4, 1, 2);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
glBindBufferRange(GL_UNIFORM_BUFFER, 0, 0, 1, 2);
EXPECT_GL_NO_ERROR();
}
}
// Test that CopyTexture cannot redefine an immutable texture and CopySubTexture can copy data to
// immutable textures
TEST_P(CopyTextureTest, ImmutableTexture)
{
if (!checkExtensions())
{
return;
}
if (getClientMajorVersion() < 3 &&
(!extensionEnabled("GL_EXT_texture_storage") || !extensionEnabled("GL_OES_rgb8_rgba8")))
{
std::cout
<< "Test skipped due to missing ES3 or GL_EXT_texture_storage or GL_OES_rgb8_rgba8"
<< std::endl;
return;
}
GLColor pixels = GLColor::red;
glBindTexture(GL_TEXTURE_2D, mTextures[0]);
glTexStorage2DEXT(GL_TEXTURE_2D, 1, GL_RGBA8_OES, 1, 1);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixels);
glBindTexture(GL_TEXTURE_2D, mTextures[1]);
glTexStorage2DEXT(GL_TEXTURE_2D, 1, GL_RGBA8_OES, 1, 1);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextures[1], 0);
EXPECT_GL_NO_ERROR();
// Should generate an error when the texture is redefined
glCopyTextureCHROMIUM(mTextures[0], mTextures[1], GL_RGBA, GL_UNSIGNED_BYTE, false, false,
false);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
// Should succeed when using CopySubTexture
glCopySubTextureCHROMIUM(mTextures[0], mTextures[1], 0, 0, 0, 0, 1, 1, false, false, false);
EXPECT_GL_NO_ERROR();
// Check that FB is complete.
EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));
EXPECT_PIXEL_COLOR_EQ(0, 0, pixels);
EXPECT_GL_NO_ERROR();
}
// The test verifies that glCopyTexSubImage2D generates a GL_INVALID_OPERATION error
// when the read buffer is GL_NONE.
// Reference: GLES 3.0.4, Section 3.8.5 Alternate Texture Image Specification Commands
TEST_P(CopyTexImageTestES3, ReadBufferIsNone)
{
GLfloat color[] = {
0.25f, 1.0f, 0.75f, 0.5f,
};
GLuint fbo = createFramebuffer(GL_RGBA, GL_UNSIGNED_BYTE, color);
GLuint tex = createTextureFromCopyTexImage(fbo, GL_RGBA);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glBindTexture(GL_TEXTURE_2D, tex);
glReadBuffer(GL_NONE);
EXPECT_GL_NO_ERROR();
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, 4, 4);
EXPECT_GL_ERROR(GL_INVALID_OPERATION);
glDeleteFramebuffers(1, &fbo);
glDeleteTextures(1, &tex);
}