forked from KolibriOS/kolibrios
207 lines
4.4 KiB
Plaintext
207 lines
4.4 KiB
Plaintext
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Here are listed the functions that TinyGL understands with the known
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limitations. The non mentionned functions are *not* implemented and
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must not be used.
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************ glEnable / glDisable
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- The following flags are handled:
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GL_CULL_FACE, GL_LIGHTING, GL_COLOR_MATERIAL, GL_TEXTURE_2D, GL_NORMALIZE,
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GL_LIGHTx, GL_POLYGON_OFFSET_FILL, GL_POLYGON_OFFSET_POINT,
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GL_POLYGON_OFFSET_LINE
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- GL_DEPTH_TEST is accepted, but it is only used for lines. For all
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other primitives, Z buffer use is assumed. The DepthMode is
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hardcoded as GL_LESS (OpenGL default).
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************ glShadeModel
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OK.
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************ glCullFace
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OK.
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************ glPolygonMode
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OK.
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************ glBegin
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No tests are performed to prevent some functions of being executed
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between glBegin/glEnd.
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************ glEnd
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OK.
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************ glVertex
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Some prototypes are not implemented.
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************ glColor
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Some prototypes are not implemented.
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************ glNormal
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Some prototypes are not implemented.
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************ glTexCoord
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- Some prototypes are not implemented.
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- The Matrix transformation is not applied yet.
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************ glEdgeFlag
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OK. The edge handling has to be tested, although it is not much useful
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in TinyGL.
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************ glMatrixMode / glLoadMatrixf / glLoadIdentity / glMultMatrixf /
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glPushMatrix / glPopMatrix / glRotatef / glTranslatef / glScalef /
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glFrustum
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- The prototypes with doubles are not implemented.
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************ glViewport
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GlViewport calls a function pointers to tell glx (or another display
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system) to resize the Z buffer and the ximage. Made optional in
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version 0.2.
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************ glGenLists / glIsList / glNewList / glEndList / glCallList
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OK.
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************ glClear / glClearColor / glClearDepth
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The whole zbuffer and the colors are cleared in any case. The clear color
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can be redefined, by *not* the initial z value.
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************ glRenderMode
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Only the modes GL_RENDER and GL_SELECT are implemented.
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************ glSelectBuffer / glInitNames / glPushName / glPopName / glLoadName
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OK.
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************ glGenTextures / glDeleteTextures / glBindTexture
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OK. These functions should be used to get the maximum performance with
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TinyGL.
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************ glTexImage2D
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The function accepts only RGB UNSIGNED_BYTES bitmaps. They are
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internally resized to 256x256 so you'd better use that size. No
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mipmapping is implemented although it will come if asked. No borders
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are implemented.
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************ glTexEnvi
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The only supported mode is GL_DECAL, although others are planned if
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asked.
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************ glTexParameteri
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The other prototypes are not implemented. Only the follwing mode are
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implemented:
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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************ glPixelStorei
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The pixels are alware byte aligned.
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************ glMaterialfv / glMaterialf / glColorMaterial
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OK.
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************ glLightfv / glLightf / glLightModeli / glLightModelfv
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OK. The OpenGL lightening is implemented but not optimized.
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************ glFlush
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Ignored.
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************ glHint
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Ignored.
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************ glGetIntegerv
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- only GL_VIEWPORT, GL_MAX_MODELVIEW_STACK_DEPTH,
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GL_MAX_PROJECTION_STACK_DEPTH, GL_MAX_LIGHTS, GL_MAX_TEXTURE_SIZE,
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GL_MAX_TEXTURE_STACK_DEPTH
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************ glGetIntegerv
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- only GL_TEXTURE_MATRIX, GL_PROJECTION_MATRIX, GL_MODELVIEW_MATRIX,
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GL_LINE_WIDTH, GL_LINE_WIDTH_RANGE, GL_POINT_SIZE, GL_POINT_SIZE_RANGE
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************ glPolygonOffset
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- only API implemented.
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************ glEnableClientState, glDisableClientState,
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- No support for GL_INDEX_ARRAY_POINTER or GL_EDGE_FLAG_ARRAY_POINTER
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************ glVertexPointer, glNormalPointer,
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glColorPointer, glTexureCoordPointer
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- OK
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------------------------------------------------------------------------------
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TinyGL GLX emulation:
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************ glXQueryExtension
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Returns always True
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************ glXChooseVisual
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Only 8 bit Pseudocolor or 16 bit Truecolor Visual are accepted. The
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attribute list is ignored.
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************ glXCreateContext
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The sharing is not implemented although the code could handle it.
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************ glXDestroyContext
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OK.
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************ glXMakeCurrent
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Not all the syntax is supported yet, in particular with the 'NULL' or
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'None' parameters.
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************ glXSwapBuffers
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OK.
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************ glXWaitGL / glXWaitX
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Ignored.
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See README.BEOS for BeOS limitations.
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