{

sf::Lock lock(idMutex);

static sf::Uint64 id = 1; // start at 1, zero is "no texture"

return id++;

m_size (0, 0),

m_actualSize (0, 0),

m_texture (0),

m_isSmooth (false),

m_sRgb (false),

m_isRepeated (false),

m_pixelsFlipped(false),

m_fboAttachment(false),

m_hasMipmap (false),

m_cacheId (getUniqueId())

{

m_size (0, 0),

m_actualSize (0, 0),

m_texture (0),

m_isSmooth (copy.m_isSmooth),

m_sRgb (copy.m_sRgb),

m_isRepeated (copy.m_isRepeated),

m_pixelsFlipped(false),

m_fboAttachment(false),

m_hasMipmap (false),

m_cacheId (getUniqueId())

{

if (copy.m_texture)

{

if (create(copy.getSize().x, copy.getSize().y))

{

update(copy);

// Force an OpenGL flush, so that the texture will appear updated

// in all contexts immediately (solves problems in multi-threaded apps)

glCheck(glFlush());

}

else

{

err() << "Failed to copy texture, failed to create new texture" << std::endl;

}

}

{

// Check if texture parameters are valid before creating it

if ((width == 0) || (height == 0))

{

err() << "Failed to create texture, invalid size (" << width << "x" << height << ")" << std::endl;

return false;

}

// Compute the internal texture dimensions depending on NPOT textures support

Vector2u actualSize(getValidSize(width), getValidSize(height));

// Check the maximum texture size

unsigned int maxSize = getMaximumSize();

if ((actualSize.x > maxSize) || (actualSize.y > maxSize))

{

err() << "Failed to create texture, its internal size is too high "

<< "(" << actualSize.x << "x" << actualSize.y << ", "

<< "maximum is " << maxSize << "x" << maxSize << ")"

<< std::endl;

return false;

}

// All the validity checks passed, we can store the new texture settings

m_size.x = width;

m_size.y = height;

m_actualSize = actualSize;

m_pixelsFlipped = false;

m_fboAttachment = false;

TransientContextLock lock;

// Create the OpenGL texture if it doesn't exist yet

if (!m_texture)

{

GLuint texture;

glCheck(glGenTextures(1, &texture));

m_texture = static_cast<unsigned int>(texture);

}

// Make sure that extensions are initialized

priv::ensureExtensionsInit();

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

static bool textureEdgeClamp = GLEXT_texture_edge_clamp || GLEXT_EXT_texture_edge_clamp;

if (!m_isRepeated && !textureEdgeClamp)

{

static bool warned = false;

if (!warned)

{

err() << "OpenGL extension SGIS_texture_edge_clamp unavailable" << std::endl;

err() << "Artifacts may occur along texture edges" << std::endl;

err() << "Ensure that hardware acceleration is enabled if available" << std::endl;

warned = true;

}

}

static bool textureSrgb = GLEXT_texture_sRGB;

if (m_sRgb && !textureSrgb)

{

static bool warned = false;

if (!warned)

{

#ifndef SFML_OPENGL_ES

err() << "OpenGL extension EXT_texture_sRGB unavailable" << std::endl;

#else

err() << "OpenGL ES extension EXT_sRGB unavailable" << std::endl;

#endif

err() << "Automatic sRGB to linear conversion disabled" << std::endl;

warned = true;

}

m_sRgb = false;

}

// Initialize the texture

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(glTexImage2D(GL_TEXTURE_2D, 0, (m_sRgb ? GLEXT_GL_SRGB8_ALPHA8 : GL_RGBA), m_actualSize.x, m_actualSize.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, m_isRepeated ? GL_REPEAT : (textureEdgeClamp ? GLEXT_GL_CLAMP_TO_EDGE : GLEXT_GL_CLAMP)));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, m_isRepeated ? GL_REPEAT : (textureEdgeClamp ? GLEXT_GL_CLAMP_TO_EDGE : GLEXT_GL_CLAMP)));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));

m_cacheId = getUniqueId();

m_hasMipmap = false;

return true;

{

Image image;

return image.loadFromFile(filename) && loadFromImage(image, area);

{

Image image;

return image.loadFromMemory(data, size) && loadFromImage(image, area);

{

Image image;

return image.loadFromStream(stream) && loadFromImage(image, area);

{

// Retrieve the image size

int width = static_cast<int>(image.getSize().x);

int height = static_cast<int>(image.getSize().y);

// Load the entire image if the source area is either empty or contains the whole image

if (area.width == 0 || (area.height == 0) ||

((area.left <= 0) && (area.top <= 0) && (area.width >= width) && (area.height >= height)))

{

// Load the entire image

if (create(image.getSize().x, image.getSize().y))

{

update(image);

return true;

}

else

{

return false;

}

}

else

{

// Load a sub-area of the image

// Adjust the rectangle to the size of the image

IntRect rectangle = area;

if (rectangle.left < 0) rectangle.left = 0;

if (rectangle.top < 0) rectangle.top = 0;

if (rectangle.left + rectangle.width > width) rectangle.width = width - rectangle.left;

if (rectangle.top + rectangle.height > height) rectangle.height = height - rectangle.top;

// Create the texture and upload the pixels

if (create(rectangle.width, rectangle.height))

{

TransientContextLock lock;

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

// Copy the pixels to the texture, row by row

const Uint8* pixels = image.getPixelsPtr() + 4 * (rectangle.left + (width * rectangle.top));

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

for (int i = 0; i < rectangle.height; ++i)

{

glCheck(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, i, rectangle.width, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixels));

pixels += 4 * width;

}

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));

m_hasMipmap = false;

// Force an OpenGL flush, so that the texture will appear updated

// in all contexts immediately (solves problems in multi-threaded apps)

glCheck(glFlush());

return true;

}

else

{

return false;

}

}

{

// Easy case: empty texture

if (!m_texture)

return Image();

TransientContextLock lock;

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

// Create an array of pixels

std::vector<Uint8> pixels(m_size.x * m_size.y * 4);

#ifdef SFML_OPENGL_ES

// OpenGL ES doesn't have the glGetTexImage function, the only way to read

// from a texture is to bind it to a FBO and use glReadPixels

GLuint frameBuffer = 0;

glCheck(GLEXT_glGenFramebuffers(1, &frameBuffer));

if (frameBuffer)

{

GLint previousFrameBuffer;

glCheck(glGetIntegerv(GLEXT_GL_FRAMEBUFFER_BINDING, &previousFrameBuffer));

glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_FRAMEBUFFER, frameBuffer));

glCheck(GLEXT_glFramebufferTexture2D(GLEXT_GL_FRAMEBUFFER, GLEXT_GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture, 0));

glCheck(glReadPixels(0, 0, m_size.x, m_size.y, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[0]));

glCheck(GLEXT_glDeleteFramebuffers(1, &frameBuffer));

glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_FRAMEBUFFER, previousFrameBuffer));

}

#else

if ((m_size == m_actualSize) && !m_pixelsFlipped)

{

// Texture is not padded nor flipped, we can use a direct copy

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[0]));

}

else

{

// Texture is either padded or flipped, we have to use a slower algorithm

// All the pixels will first be copied to a temporary array

std::vector<Uint8> allPixels(m_actualSize.x * m_actualSize.y * 4);

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, &allPixels[0]));

// Then we copy the useful pixels from the temporary array to the final one

const Uint8* src = &allPixels[0];

Uint8* dst = &pixels[0];

int srcPitch = m_actualSize.x * 4;

int dstPitch = m_size.x * 4;

// Handle the case where source pixels are flipped vertically

if (m_pixelsFlipped)

{

src += srcPitch * (m_size.y - 1);

srcPitch = -srcPitch;

}

for (unsigned int i = 0; i < m_size.y; ++i)

{

std::memcpy(dst, src, dstPitch);

src += srcPitch;

dst += dstPitch;

}

}

#endif // SFML_OPENGL_ES

// Create the image

Image image;

image.create(m_size.x, m_size.y, &pixels[0]);

return image;

{

// Update the whole texture

update(pixels, m_size.x, m_size.y, 0, 0);

{

assert(x + width <= m_size.x);

assert(y + height <= m_size.y);

if (pixels && m_texture)

{

TransientContextLock lock;

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

// Copy pixels from the given array to the texture

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(glTexSubImage2D(GL_TEXTURE_2D, 0, x, y, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));

m_hasMipmap = false;

m_pixelsFlipped = false;

m_cacheId = getUniqueId();

// Force an OpenGL flush, so that the texture data will appear updated

// in all contexts immediately (solves problems in multi-threaded apps)

glCheck(glFlush());

}

{

// Update the whole texture

update(texture, 0, 0);

{

assert(x + texture.m_size.x <= m_size.x);

assert(y + texture.m_size.y <= m_size.y);

if (!m_texture || !texture.m_texture)

return;

#ifndef SFML_OPENGL_ES

{

TransientContextLock lock;

// Make sure that extensions are initialized

priv::ensureExtensionsInit();

}

if (GLEXT_framebuffer_object && GLEXT_framebuffer_blit)

{

TransientContextLock lock;

// Save the current bindings so we can restore them after we are done

GLint readFramebuffer = 0;

GLint drawFramebuffer = 0;

glCheck(glGetIntegerv(GLEXT_GL_READ_FRAMEBUFFER_BINDING, &readFramebuffer));

glCheck(glGetIntegerv(GLEXT_GL_DRAW_FRAMEBUFFER_BINDING, &drawFramebuffer));

// Create the framebuffers

GLuint sourceFrameBuffer = 0;

GLuint destFrameBuffer = 0;

glCheck(GLEXT_glGenFramebuffers(1, &sourceFrameBuffer));

glCheck(GLEXT_glGenFramebuffers(1, &destFrameBuffer));

if (!sourceFrameBuffer || !destFrameBuffer)

{

err() << "Cannot copy texture, failed to create a frame buffer object" << std::endl;

return;

}

// Link the source texture to the source frame buffer

glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_READ_FRAMEBUFFER, sourceFrameBuffer));

glCheck(GLEXT_glFramebufferTexture2D(GLEXT_GL_READ_FRAMEBUFFER, GLEXT_GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture.m_texture, 0));

// Link the destination texture to the destination frame buffer

glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_DRAW_FRAMEBUFFER, destFrameBuffer));

glCheck(GLEXT_glFramebufferTexture2D(GLEXT_GL_DRAW_FRAMEBUFFER, GLEXT_GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture, 0));

// A final check, just to be sure...

GLenum sourceStatus;

glCheck(sourceStatus = GLEXT_glCheckFramebufferStatus(GLEXT_GL_READ_FRAMEBUFFER));

GLenum destStatus;

glCheck(destStatus = GLEXT_glCheckFramebufferStatus(GLEXT_GL_DRAW_FRAMEBUFFER));

if ((sourceStatus == GLEXT_GL_FRAMEBUFFER_COMPLETE) && (destStatus == GLEXT_GL_FRAMEBUFFER_COMPLETE))

{

// Blit the texture contents from the source to the destination texture

glCheck(GLEXT_glBlitFramebuffer(

0, texture.m_pixelsFlipped ? texture.m_size.y : 0, texture.m_size.x, texture.m_pixelsFlipped ? 0 : texture.m_size.y, // Source rectangle, flip y if source is flipped

x, y, x + texture.m_size.x, y + texture.m_size.y, // Destination rectangle

GL_COLOR_BUFFER_BIT, GL_NEAREST

));

}

else

{

err() << "Cannot copy texture, failed to link texture to frame buffer" << std::endl;

}

// Restore previously bound framebuffers

glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_READ_FRAMEBUFFER, readFramebuffer));

glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_DRAW_FRAMEBUFFER, drawFramebuffer));

// Delete the framebuffers

glCheck(GLEXT_glDeleteFramebuffers(1, &sourceFrameBuffer));

glCheck(GLEXT_glDeleteFramebuffers(1, &destFrameBuffer));

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

// Set the parameters of this texture

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));

m_hasMipmap = false;

m_pixelsFlipped = false;

m_cacheId = getUniqueId();

// Force an OpenGL flush, so that the texture data will appear updated

// in all contexts immediately (solves problems in multi-threaded apps)

glCheck(glFlush());

return;

}

#endif // SFML_OPENGL_ES

update(texture.copyToImage(), x, y);

{

// Update the whole texture

update(image.getPixelsPtr(), image.getSize().x, image.getSize().y, 0, 0);

{

assert(x + window.getSize().x <= m_size.x);

assert(y + window.getSize().y <= m_size.y);

if (m_texture && window.setActive(true))

{

TransientContextLock lock;

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

// Copy pixels from the back-buffer to the texture

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x, y, 0, 0, window.getSize().x, window.getSize().y));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));

m_hasMipmap = false;

m_pixelsFlipped = true;

m_cacheId = getUniqueId();

// Force an OpenGL flush, so that the texture will appear updated

// in all contexts immediately (solves problems in multi-threaded apps)

glCheck(glFlush());

}

{

if (smooth != m_isSmooth)

{

m_isSmooth = smooth;

if (m_texture)

{

TransientContextLock lock;

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));

if (m_hasMipmap)

{

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_LINEAR));

}

else

{

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));

}

}

}

{

if (repeated != m_isRepeated)

{

m_isRepeated = repeated;

if (m_texture)

{

TransientContextLock lock;

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

static bool textureEdgeClamp = GLEXT_texture_edge_clamp || GLEXT_EXT_texture_edge_clamp;

if (!m_isRepeated && !textureEdgeClamp)

{

static bool warned = false;

if (!warned)

{

err() << "OpenGL extension SGIS_texture_edge_clamp unavailable" << std::endl;

err() << "Artifacts may occur along texture edges" << std::endl;

err() << "Ensure that hardware acceleration is enabled if available" << std::endl;

warned = true;

}

}

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, m_isRepeated ? GL_REPEAT : (textureEdgeClamp ? GLEXT_GL_CLAMP_TO_EDGE : GLEXT_GL_CLAMP)));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, m_isRepeated ? GL_REPEAT : (textureEdgeClamp ? GLEXT_GL_CLAMP_TO_EDGE : GLEXT_GL_CLAMP)));

}

}

{

if (!m_texture)

return false;

TransientContextLock lock;

// Make sure that extensions are initialized

priv::ensureExtensionsInit();

if (!GLEXT_framebuffer_object)

return false;

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(GLEXT_glGenerateMipmap(GL_TEXTURE_2D));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR_MIPMAP_LINEAR : GL_NEAREST_MIPMAP_LINEAR));

m_hasMipmap = true;

return true;

{

if (!m_hasMipmap)

return;

TransientContextLock lock;

// Make sure that the current texture binding will be preserved

priv::TextureSaver save;

glCheck(glBindTexture(GL_TEXTURE_2D, m_texture));

glCheck(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, m_isSmooth ? GL_LINEAR : GL_NEAREST));

m_hasMipmap = false;

{

TransientContextLock lock;

if (texture && texture->m_texture)

{

// Bind the texture

glCheck(glBindTexture(GL_TEXTURE_2D, texture->m_texture));

// Check if we need to define a special texture matrix

if ((coordinateType == Pixels) || texture->m_pixelsFlipped)

{

GLfloat matrix[16] = {1.f, 0.f, 0.f, 0.f,

0.f, 1.f, 0.f, 0.f,

0.f, 0.f, 1.f, 0.f,

0.f, 0.f, 0.f, 1.f};

// If non-normalized coordinates (= pixels) are requested, we need to

// setup scale factors that convert the range [0 .. size] to [0 .. 1]

if (coordinateType == Pixels)

{

matrix[0] = 1.f / texture->m_actualSize.x;

matrix[5] = 1.f / texture->m_actualSize.y;

}

// If pixels are flipped we must invert the Y axis

if (texture->m_pixelsFlipped)

{

matrix[5] = -matrix[5];

matrix[13] = static_cast<float>(texture->m_size.y) / texture->m_actualSize.y;

}

// Load the matrix

glCheck(glMatrixMode(GL_TEXTURE));

glCheck(glLoadMatrixf(matrix));

// Go back to model-view mode (sf::RenderTarget relies on it)

glCheck(glMatrixMode(GL_MODELVIEW));

}

}

else

{

// Bind no texture

glCheck(glBindTexture(GL_TEXTURE_2D, 0));

// Reset the texture matrix

glCheck(glMatrixMode(GL_TEXTURE));

glCheck(glLoadIdentity());

// Go back to model-view mode (sf::RenderTarget relies on it)

glCheck(glMatrixMode(GL_MODELVIEW));

}

{

Lock lock(maximumSizeMutex);

static bool checked = false;

static GLint size = 0;

if (!checked)

{

checked = true;

TransientContextLock lock;

glCheck(glGetIntegerv(GL_MAX_TEXTURE_SIZE, &size));

}

return static_cast<unsigned int>(size);

{

std::swap(m_size, right.m_size);

std::swap(m_actualSize, right.m_actualSize);

std::swap(m_texture, right.m_texture);

std::swap(m_isSmooth, right.m_isSmooth);

std::swap(m_sRgb, right.m_sRgb);

std::swap(m_isRepeated, right.m_isRepeated);

std::swap(m_pixelsFlipped, right.m_pixelsFlipped);

std::swap(m_fboAttachment, right.m_fboAttachment);

std::swap(m_hasMipmap, right.m_hasMipmap);

m_cacheId = getUniqueId();

right.m_cacheId = getUniqueId();

{

TransientContextLock lock;

// Make sure that extensions are initialized

priv::ensureExtensionsInit();

if (GLEXT_texture_non_power_of_two)

{

// If hardware supports NPOT textures, then just return the unmodified size

return size;

}

else

{

// If hardware doesn't support NPOT textures, we calculate the nearest power of two

unsigned int powerOfTwo = 1;

while (powerOfTwo < size)

powerOfTwo *= 2;

return powerOfTwo;

}