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OpenGL ARB Superbuffers

OpenGL ARB Superbuffers. Rob Mace mace@ati.com. ARB Superbuffers Workgroup. Active workgroup None of this is final Über Buffers proposal Image Buffers proposal Proposals are converging. What Changes?. Dynamic Framebuffers Plug and Play Mix and Match. Derived Functionality.

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OpenGL ARB Superbuffers

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  1. OpenGL ARB Superbuffers Rob Mace mace@ati.com

  2. ARB Superbuffers Workgroup • Active workgroup • None of this is final • Über Buffers proposal • Image Buffers proposal • Proposals are converging

  3. What Changes? • Dynamic Framebuffers • Plug and Play • Mix and Match

  4. Derived Functionality • Render to Texture • Render to Vertex Array • Temporary Buffers • Many new algorithms made possible

  5. Memory Objects • Structured Memory • Bindable as the memory of • Textures • Framebuffers • Buffer Objects (vertex arrays)

  6. Creating Memory Objects GLmem glAllocMem1D(GLenum format, GLsizei width, GLsizei n, const GLenum *properties, const GLint *values) GLmem glAllocMem2D(GLenum format, GLsizei width, GLsizei height, GLsizei n, const GLenum *properties, const GLint *values) GLmem glAllocMem3D(GLenum format, GLsizei width, GLsizei height, GLsizei depth, GLsizei n, const GLenum *properties, const GLint *values)

  7. Memory Object Capability Properties • GL_COLOR_BUFFER • GL_DEPTH_BUFFER • GL_STENCIL_BUFFER • GL_TEXTURE_1D • GL_TEXTURE_2D • GL_TEXTURE_3D • GL_TEXTURE_CUBE_MAP • GL_BUFFER_OBJECT

  8. Memory Object More Properties • GL_MIPMAP • GL_SAMPLES • GL_USAGE

  9. Binding Memory Objects GLboolean glBindMem(GLenum target, GLmem mem, GLenum preserve)

  10. Render to Texture GLenum properties[2] = {GL_TEXTURE_2D, GL_COLOR_BUFFER}; GLint values[2] = {GL_TRUE, GL_TRUE}; GLmem mem; mem = glAllocMem2D(GL_RGBA8, 256, 256, 2, properties, values); glBindMem(GL_AUX0, mem, GL_FALSE); glDrawBuffer(GL_AUX0); draw stuff glBindMem(GL_AUX0, 0, GL_FALSE); glBindTexture(GL_TEXTURE_2D, tex); glBindMem(GL_TEXTURE_2D, mem, GL_TRUE);

  11. Render to Vertex Array GLenum properties[2] = {GL_COLOR_BUFFER, GL_BUFFER_OBJECT}; GLint values[2] = {GL_TRUE, GL_TRUE}; GLmem mem; mem = glAllocMem2D(GL_RGBA_FLOAT32, 64, 64, 2, properties, values); glBindMem(GL_AUX0, vertex_mem, GL_FALSE); load special shaders and draw stuff glBindMem(GL_AUX0, 0, GL_FALSE); glBindBufferARB(GL_ARRAY_BUFFER_ARB, 1); glBindMem(GL_ARRAY_BUFFER_ARB, vertex_mem, GL_TRUE); glVertexPointer(4, GL_FLOAT, 0, 0); draw using the array

  12. Questions? • None of this is final • But we are getting close • mace@ati.com

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