org.lwjgl.opengl.OVRMultiview Maven / Gradle / Ivy
Show all versions of lwjgl-opengl Show documentation
/*
* Copyright LWJGL. All rights reserved.
* License terms: https://www.lwjgl.org/license
* MACHINE GENERATED FILE, DO NOT EDIT
*/
package org.lwjgl.opengl;
import org.lwjgl.system.*;
import static org.lwjgl.system.Checks.*;
/**
* Native bindings to the OVR_multiview extension.
*
* The method of stereo rendering supported in OpenGL is currently achieved by rendering to the two eye buffers sequentially. This typically incurs double
* the application and driver overhead, despite the fact that the command streams and render states are almost identical.
*
* This extension seeks to address the inefficiency of sequential multiview rendering by adding a means to render to multiple elements of a 2D texture
* array simultaneously. In multiview rendering, draw calls are instanced into each corresponding element of the texture array. The vertex program uses a
* new ViewID variable to compute per-view values, typically the vertex position and view-dependent variables like reflection.
*
* The formulation of this extension is high level in order to allow implementation freedom. On existing hardware, applications and drivers can realize
* the benefits of a single scene traversal, even if all GPU work is fully duplicated per-view. But future support could enable simultaneous rendering via
* multi-GPU, tile-based architectures could sort geometry into tiles for multiple views in a single pass, and the implementation could even choose to
* interleave at the fragment level for better texture cache utilization and more coherent fragment shader branching.
*
* The most obvious use case in this model is to support two simultaneous views: one view for each eye. However, we also anticipate a usage where two
* views are rendered per eye, where one has a wide field of view and the other has a narrow one. The nature of wide field of view planar projection is
* that the sample density can become unacceptably low in the view direction. By rendering two inset eye views per eye, we can get the required sample
* density in the center of projection without wasting samples, memory, and time by oversampling in the periphery.
*
* Requires {@link GL30 OpenGL 3.0}.
*/
public class OVRMultiview {
/** Accepted by the {@code pname} parameter of GetFramebufferAttachmentParameteriv. */
public static final int
GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_NUM_VIEWS_OVR = 0x9630,
GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_BASE_VIEW_INDEX_OVR = 0x9632;
/** Accepted by the {@code pname} parameter of GetIntegerv. */
public static final int GL_MAX_VIEWS_OVR = 0x9631;
/** Returned by CheckFramebufferStatus. */
public static final int GL_FRAMEBUFFER_INCOMPLETE_VIEW_TARGETS_OVR = 0x9633;
static { GL.initialize(); }
protected OVRMultiview() {
throw new UnsupportedOperationException();
}
static boolean isAvailable(GLCapabilities caps) {
return checkFunctions(
caps.glFramebufferTextureMultiviewOVR
);
}
// --- [ glFramebufferTextureMultiviewOVR ] ---
/**
* Operates similarly to {@link GL30#glFramebufferTextureLayer FramebufferTextureLayer}, except that {@code baseViewIndex} and {@code numViews} selects a range of texture array elements
* that will be targeted when rendering.
*
* The command
*
*
* View( uint id );does not exist in the GL, but is used here to describe the multi-view functionality in this section. The effect of this hypothetical function is to set
* the value of the shader built-in input uint {@code gl_ViewID_OVR}.
*
* When multi-view rendering is enabled, drawing commands have the same effect as:
*
*
* for( int i = 0; i < numViews; i++ ) {
* FramebufferTextureLayer( target, attachment, texture, level, baseViewIndex + i );
* View( i );
* <drawing-command>
* }The result is that every drawing command is broadcast into every active view. The shader uses {@code gl_ViewID_OVR} to compute view dependent outputs.
*
* The number of views, as specified by {@code numViews}, must be the same for all framebuffer attachments points where the value of
* {@link GL30#GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE} is not {@link GL11#GL_NONE NONE} or the framebuffer is incomplete.
*
* In this mode there are several restrictions:
*
*
* - in vertex shader {@code gl_Position} is the only output that can depend on {@code ViewID}
* - no transform feedback
* - no tessellation control or evaluation shaders
* - no geometry shader
* - no timer query
* - occlusion query results must be between max and sum of per-view queries, inclusive
*
*
* Errors
*
* {@link GL11#GL_INVALID_OPERATION INVALID_OPERATION} is generated by FramebufferTextureMultiviewOVR if target is {@link GL30#GL_READ_FRAMEBUFFER READ_FRAMEBUFFER}.
*
* {@link GL11#GL_INVALID_VALUE INVALID_VALUE} is generated by FramebufferTextureMultiviewOVR if {@code numViews} is less than 1, if {@code numViews} is more than {@link #GL_MAX_VIEWS_OVR MAX_VIEWS_OVR} or if
* {@code (baseViewIndex + numViews)} exceeds {@link GL30#GL_MAX_ARRAY_TEXTURE_LAYERS MAX_ARRAY_TEXTURE_LAYERS}.
*
* {@link GL11#GL_INVALID_OPERATION INVALID_OPERATION} is generated if a rendering command is issued and the number of views in the current draw framebuffer is not equal to the number
* of views declared in the currently bound program.
*
* @param target the framebuffer target. One of:
{@link GL30#GL_FRAMEBUFFER FRAMEBUFFER} {@link GL30#GL_READ_FRAMEBUFFER READ_FRAMEBUFFER} {@link GL30#GL_DRAW_FRAMEBUFFER DRAW_FRAMEBUFFER}
* @param attachment the attachment point of the framebuffer. One of:
{@link GL30#GL_COLOR_ATTACHMENT0 COLOR_ATTACHMENT0} {@link GL30#GL_COLOR_ATTACHMENT1 COLOR_ATTACHMENT1} {@link GL30#GL_COLOR_ATTACHMENT2 COLOR_ATTACHMENT2} {@link GL30#GL_COLOR_ATTACHMENT3 COLOR_ATTACHMENT3} {@link GL30#GL_COLOR_ATTACHMENT4 COLOR_ATTACHMENT4} {@link GL30#GL_COLOR_ATTACHMENT5 COLOR_ATTACHMENT5} {@link GL30#GL_COLOR_ATTACHMENT6 COLOR_ATTACHMENT6} {@link GL30#GL_COLOR_ATTACHMENT7 COLOR_ATTACHMENT7} {@link GL30#GL_COLOR_ATTACHMENT8 COLOR_ATTACHMENT8} {@link GL30#GL_COLOR_ATTACHMENT9 COLOR_ATTACHMENT9} {@link GL30#GL_COLOR_ATTACHMENT10 COLOR_ATTACHMENT10} {@link GL30#GL_COLOR_ATTACHMENT11 COLOR_ATTACHMENT11} {@link GL30#GL_COLOR_ATTACHMENT12 COLOR_ATTACHMENT12} {@link GL30#GL_COLOR_ATTACHMENT13 COLOR_ATTACHMENT13} {@link GL30#GL_COLOR_ATTACHMENT14 COLOR_ATTACHMENT14} {@link GL30#GL_COLOR_ATTACHMENT15 COLOR_ATTACHMENT15} {@link GL30#GL_COLOR_ATTACHMENT16 COLOR_ATTACHMENT16} {@link GL30#GL_COLOR_ATTACHMENT17 COLOR_ATTACHMENT17} {@link GL30#GL_COLOR_ATTACHMENT18 COLOR_ATTACHMENT18} {@link GL30#GL_COLOR_ATTACHMENT19 COLOR_ATTACHMENT19} {@link GL30#GL_COLOR_ATTACHMENT20 COLOR_ATTACHMENT20} {@link GL30#GL_COLOR_ATTACHMENT21 COLOR_ATTACHMENT21} {@link GL30#GL_COLOR_ATTACHMENT22 COLOR_ATTACHMENT22} {@link GL30#GL_COLOR_ATTACHMENT23 COLOR_ATTACHMENT23} {@link GL30#GL_COLOR_ATTACHMENT24 COLOR_ATTACHMENT24} {@link GL30#GL_COLOR_ATTACHMENT25 COLOR_ATTACHMENT25} {@link GL30#GL_COLOR_ATTACHMENT26 COLOR_ATTACHMENT26} {@link GL30#GL_COLOR_ATTACHMENT27 COLOR_ATTACHMENT27} {@link GL30#GL_COLOR_ATTACHMENT28 COLOR_ATTACHMENT28} {@link GL30#GL_COLOR_ATTACHMENT29 COLOR_ATTACHMENT29} {@link GL30#GL_COLOR_ATTACHMENT30 COLOR_ATTACHMENT30} {@link GL30#GL_COLOR_ATTACHMENT31 COLOR_ATTACHMENT31} {@link GL30#GL_DEPTH_ATTACHMENT DEPTH_ATTACHMENT} {@link GL30#GL_STENCIL_ATTACHMENT STENCIL_ATTACHMENT} {@link GL30#GL_DEPTH_STENCIL_ATTACHMENT DEPTH_STENCIL_ATTACHMENT}
* @param texture the texture object to attach to the framebuffer attachment point named by {@code attachment}
* @param level the mipmap level of {@code texture} to attach
* @param baseViewIndex the base framebuffer texture layer index
* @param numViews the number of views to target when rendering
*/
public static native void glFramebufferTextureMultiviewOVR(@NativeType("GLenum") int target, @NativeType("GLenum") int attachment, @NativeType("GLuint") int texture, @NativeType("GLint") int level, @NativeType("GLint") int baseViewIndex, @NativeType("GLsizei") int numViews);
}