Class EXTClearTexture
Texture objects are fundamental to the operation of OpenGL. They are used as a source for texture sampling and destination for rendering as well as
being accessed in shaders for image load/store operations It is also possible to invalidate the contents of a texture. It is currently only possible to
set texture image data to known values by uploading some or all of a image array from application memory or by attaching it to a framebuffer object and
using the Clear
or ClearBuffer
commands.
Both uploading initial texture data and clearing by attaching to a framebuffer have potential disadvantages when one simply wants to initialize texture data to a known value. Uploading initial data requires the application to allocate a (potentially large) chunk of memory and transferring that to the GL. This can be a costly operation both in terms of memory bandwidth and power usage. Alternatively, attaching a texture level to a framebuffer to clear it may not be possible if the texture format isn't supported for rendering, or even if it is, attaching the image to a framebuffer object may cause the texture to be allocated in certain types of memory, which it may otherwise not need to be placed in.
This extension solves these problems by providing a mechanism whereby the contents of a texture image array can be set to known values by using the
ClearTexImageEXT
or ClearTexSubImageEXT
commands. These commands can also be useful for initializing an image that will be used for atomic shader
operations.
Requires GLES 3.1
.
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Method Summary
Modifier and TypeMethodDescriptionstatic void
glClearTexImageEXT
(int texture, int level, int format, int type, float[] data) Array version of:ClearTexImageEXT
static void
glClearTexImageEXT
(int texture, int level, int format, int type, int[] data) Array version of:ClearTexImageEXT
static void
glClearTexImageEXT
(int texture, int level, int format, int type, short[] data) Array version of:ClearTexImageEXT
static void
glClearTexImageEXT
(int texture, int level, int format, int type, ByteBuffer data) static void
glClearTexImageEXT
(int texture, int level, int format, int type, FloatBuffer data) static void
glClearTexImageEXT
(int texture, int level, int format, int type, IntBuffer data) static void
glClearTexImageEXT
(int texture, int level, int format, int type, ShortBuffer data) static void
glClearTexSubImageEXT
(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, float[] data) Array version of:ClearTexSubImageEXT
static void
glClearTexSubImageEXT
(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, int[] data) Array version of:ClearTexSubImageEXT
static void
glClearTexSubImageEXT
(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, short[] data) Array version of:ClearTexSubImageEXT
static void
glClearTexSubImageEXT
(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, ByteBuffer data) static void
glClearTexSubImageEXT
(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, FloatBuffer data) static void
glClearTexSubImageEXT
(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, IntBuffer data) static void
glClearTexSubImageEXT
(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, ShortBuffer data) static void
nglClearTexImageEXT
(int texture, int level, int format, int type, long data) static void
nglClearTexSubImageEXT
(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, long data)
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Method Details
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nglClearTexImageEXT
public static void nglClearTexImageEXT(int texture, int level, int format, int type, long data) -
glClearTexImageEXT
public static void glClearTexImageEXT(int texture, int level, int format, int type, @Nullable ByteBuffer data) -
glClearTexImageEXT
public static void glClearTexImageEXT(int texture, int level, int format, int type, @Nullable ShortBuffer data) -
glClearTexImageEXT
public static void glClearTexImageEXT(int texture, int level, int format, int type, @Nullable IntBuffer data) -
glClearTexImageEXT
public static void glClearTexImageEXT(int texture, int level, int format, int type, @Nullable FloatBuffer data) -
nglClearTexSubImageEXT
public static void nglClearTexSubImageEXT(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, long data) -
glClearTexSubImageEXT
public static void glClearTexSubImageEXT(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, @Nullable ByteBuffer data) -
glClearTexSubImageEXT
public static void glClearTexSubImageEXT(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, @Nullable ShortBuffer data) -
glClearTexSubImageEXT
public static void glClearTexSubImageEXT(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, @Nullable IntBuffer data) -
glClearTexSubImageEXT
public static void glClearTexSubImageEXT(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, @Nullable FloatBuffer data) -
glClearTexImageEXT
public static void glClearTexImageEXT(int texture, int level, int format, int type, @Nullable short[] data) Array version of:ClearTexImageEXT
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glClearTexImageEXT
public static void glClearTexImageEXT(int texture, int level, int format, int type, @Nullable int[] data) Array version of:ClearTexImageEXT
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glClearTexImageEXT
public static void glClearTexImageEXT(int texture, int level, int format, int type, @Nullable float[] data) Array version of:ClearTexImageEXT
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glClearTexSubImageEXT
public static void glClearTexSubImageEXT(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, @Nullable short[] data) Array version of:ClearTexSubImageEXT
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glClearTexSubImageEXT
public static void glClearTexSubImageEXT(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, @Nullable int[] data) Array version of:ClearTexSubImageEXT
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glClearTexSubImageEXT
public static void glClearTexSubImageEXT(int texture, int level, int xoffset, int yoffset, int zoffset, int width, int height, int depth, int format, int type, @Nullable float[] data) Array version of:ClearTexSubImageEXT
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