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<section id="module-pygame.pixelcopy">
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<span id="pygame-pixelcopy"></span><dl class="definition">
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<dt class="title module sig sig-object">
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<code class="docutils literal notranslate"><span class="pre">pygame.pixelcopy</span></code></dt>
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<dd><div class="line-block">
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<div class="line"><span class="summaryline">pygame module for general pixel array copying</span></div>
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</div>
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<table class="toc docutils align-default">
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<colgroup>
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<col style="width: 36%" />
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<col style="width: 1%" />
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<col style="width: 63%" />
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</colgroup>
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<tbody>
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<tr class="row-odd"><td><div class="line"><a class="toc reference external" href="pixelcopy.html#pygame.pixelcopy.surface_to_array">pygame.pixelcopy.surface_to_array</a></div>
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</td>
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<td>—</td>
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<td>copy surface pixels to an array object</td>
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</tr>
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<tr class="row-even"><td><div class="line"><a class="toc reference external" href="pixelcopy.html#pygame.pixelcopy.array_to_surface">pygame.pixelcopy.array_to_surface</a></div>
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</td>
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<td>—</td>
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<td>copy an array object to a surface</td>
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</tr>
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<tr class="row-odd"><td><div class="line"><a class="toc reference external" href="pixelcopy.html#pygame.pixelcopy.map_array">pygame.pixelcopy.map_array</a></div>
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</td>
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<td>—</td>
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<td>copy an array to another array, using surface format</td>
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</tr>
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<tr class="row-even"><td><div class="line"><a class="toc reference external" href="pixelcopy.html#pygame.pixelcopy.make_surface">pygame.pixelcopy.make_surface</a></div>
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</td>
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<td>—</td>
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<td>Copy an array to a new surface</td>
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</tr>
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</tbody>
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</table>
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<p>The <code class="docutils literal notranslate"><span class="pre">pygame.pixelcopy</span></code> module contains functions for copying between
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surfaces and objects exporting an array structure interface. It is a backend
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for <a class="tooltip reference internal" href="surfarray.html#module-pygame.surfarray" title=""><code class="xref py py-mod docutils literal notranslate"><span class="pre">pygame.surfarray</span></code><span class="tooltip-content">pygame module for accessing surface pixel data using array interfaces</span></a>, adding NumPy support. But pixelcopy is more
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general, and intended for direct use.</p>
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<p>The array struct interface exposes an array's data in a standard way.
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It was introduced in NumPy. In Python 2.7 and above it is replaced by the
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new buffer protocol, though the buffer protocol is still a work in progress.
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The array struct interface, on the other hand, is stable and works with earlier
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Python versions. So for now the array struct interface is the predominate way
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pygame handles array introspection.</p>
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<p>For 2d arrays of integer pixel values, the values are mapped to the
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pixel format of the related surface. To get the actual color of a pixel
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value use <a class="tooltip reference internal" href="surface.html#pygame.Surface.unmap_rgb" title=""><code class="xref py py-meth docutils literal notranslate"><span class="pre">pygame.Surface.unmap_rgb()</span></code><span class="tooltip-content">convert a mapped integer color value into a Color</span></a>. 2d arrays can only be used
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directly between surfaces having the same pixel layout.</p>
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<p>New in pygame 1.9.2.</p>
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<dl class="py function definition">
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<dt class="sig sig-object py title" id="pygame.pixelcopy.surface_to_array">
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<span class="sig-prename descclassname"><span class="pre">pygame.pixelcopy.</span></span><span class="sig-name descname"><span class="pre">surface_to_array</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pygame.pixelcopy.surface_to_array" title="Permalink to this definition">¶</a></dt>
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<dd><div class="line-block">
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<div class="line"><span class="summaryline">copy surface pixels to an array object</span></div>
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<div class="line"><span class="signature">surface_to_array(array, surface, kind='P', opaque=255, clear=0) -> None</span></div>
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</div>
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<p>The surface_to_array function copies pixels from a Surface object
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to a 2D or 3D array. Depending on argument <code class="docutils literal notranslate"><span class="pre">kind</span></code> and the target array
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dimension, a copy may be raw pixel value, RGB, a color component slice,
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or colorkey alpha transparency value. Recognized <code class="docutils literal notranslate"><span class="pre">kind</span></code> values are the
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single character codes 'P', 'R', 'G', 'B', 'A', and 'C'. Kind codes are case
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insensitive, so 'p' is equivalent to 'P'. The first two dimensions
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of the target must be the surface size (w, h).</p>
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<p>The default 'P' kind code does a direct raw integer pixel (mapped) value
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copy to a 2D array and a 'RGB' pixel component (unmapped) copy to a 3D array
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having shape (w, h, 3). For an 8 bit colormap surface this means the
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table index is copied to a 2D array, not the table value itself. A 2D
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array's item size must be at least as large as the surface's pixel
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byte size. The item size of a 3D array must be at least one byte.</p>
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<p>For the 'R', 'G', 'B', and 'A' copy kinds a single color component
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of the unmapped surface pixels are copied to the target 2D array.
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For kind 'A' and surfaces with source alpha (the surface was created with
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the SRCALPHA flag), has a colorkey
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(set with <a class="reference internal" href="surface.html#pygame.Surface.set_colorkey" title="pygame.Surface.set_colorkey"><code class="xref py py-meth docutils literal notranslate"><span class="pre">Surface.set_colorkey()</span></code></a>),
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or has a blanket alpha
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(set with <a class="reference internal" href="surface.html#pygame.Surface.set_alpha" title="pygame.Surface.set_alpha"><code class="xref py py-meth docutils literal notranslate"><span class="pre">Surface.set_alpha()</span></code></a>)
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then the alpha values are those expected for a SDL surface.
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If a surface has no explicit alpha value, then the target array
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is filled with the value of the optional <code class="docutils literal notranslate"><span class="pre">opaque</span></code> surface_to_array
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argument (default 255: not transparent).</p>
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<p>Copy kind 'C' is a special case for alpha copy of a source surface
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with colorkey. Unlike the 'A' color component copy, the <code class="docutils literal notranslate"><span class="pre">clear</span></code>
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argument value is used for colorkey matches, <code class="docutils literal notranslate"><span class="pre">opaque</span></code> otherwise.
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By default, a match has alpha 0 (totally transparent), while everything
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else is alpha 255 (totally opaque). It is a more general implementation
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of <a class="tooltip reference internal" href="surfarray.html#pygame.surfarray.array_colorkey" title=""><code class="xref py py-meth docutils literal notranslate"><span class="pre">pygame.surfarray.array_colorkey()</span></code><span class="tooltip-content">Copy the colorkey values into a 2d array</span></a>.</p>
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<p>Specific to surface_to_array, a ValueError is raised for target arrays
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with incorrect shape or item size. A TypeError is raised for an incorrect
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kind code. Surface specific problems, such as locking, raise a pygame.error.</p>
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</dd></dl>
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<dl class="py function definition">
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<dt class="sig sig-object py title" id="pygame.pixelcopy.array_to_surface">
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<span class="sig-prename descclassname"><span class="pre">pygame.pixelcopy.</span></span><span class="sig-name descname"><span class="pre">array_to_surface</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pygame.pixelcopy.array_to_surface" title="Permalink to this definition">¶</a></dt>
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<dd><div class="line-block">
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<div class="line"><span class="summaryline">copy an array object to a surface</span></div>
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<div class="line"><span class="signature">array_to_surface(<surface>, <array>) -> None</span></div>
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</div>
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<p>See <a class="tooltip reference internal" href="surfarray.html#pygame.surfarray.blit_array" title=""><code class="xref py py-func docutils literal notranslate"><span class="pre">pygame.surfarray.blit_array()</span></code><span class="tooltip-content">Blit directly from a array values</span></a>.</p>
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</dd></dl>
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<dl class="py function definition">
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<dt class="sig sig-object py title" id="pygame.pixelcopy.map_array">
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<span class="sig-prename descclassname"><span class="pre">pygame.pixelcopy.</span></span><span class="sig-name descname"><span class="pre">map_array</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pygame.pixelcopy.map_array" title="Permalink to this definition">¶</a></dt>
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<dd><div class="line-block">
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<div class="line"><span class="summaryline">copy an array to another array, using surface format</span></div>
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<div class="line"><span class="signature">map_array(<array>, <array>, <surface>) -> None</span></div>
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</div>
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<p>Map an array of color element values - (w, h, ..., 3) - to an array of
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pixels - (w, h) according to the format of <surface>.</p>
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</dd></dl>
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<dl class="py function definition">
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<dt class="sig sig-object py title" id="pygame.pixelcopy.make_surface">
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<span class="sig-prename descclassname"><span class="pre">pygame.pixelcopy.</span></span><span class="sig-name descname"><span class="pre">make_surface</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pygame.pixelcopy.make_surface" title="Permalink to this definition">¶</a></dt>
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<dd><div class="line-block">
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<div class="line"><span class="summaryline">Copy an array to a new surface</span></div>
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<div class="line"><span class="signature">pygame.pixelcopy.make_surface(array) -> Surface</span></div>
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</div>
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<p>Create a new Surface that best resembles the data and format of the array.
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The array can be 2D or 3D with any sized integer values.</p>
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</dd></dl>
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</dd></dl>
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