5288f6d88d
This adds a publicly exposed experimental API for a 3D texture backend. There is a feature flag which can be checked for whether 3D textures are supported. Although we require OpenGL 1.2 which has 3D textures in core, GLES only provides them through an extension so the feature can be used to detect that. The textures can be created with one of two new API functions :- cogl_texture_3d_new_with_size and cogl_texture_3d_new_from_data There is also internally a new_from_bitmap function. new_from_data is implemented in terms of this function. The two constructors are effectively the only way to upload data to a 3D texture. It does not work to call glTexImage2D with the GL_TEXTURE_3D target so the virtual for cogl_texture_set_region does nothing. It would be possible to make cogl_texture_get_data do something sensible like returning all of the images as a single long image but this is not currently implemented and instead the virtual just always fails. We may want to add API specific to the 3D texture backend to get and set a sub region of the texture. All of those three functions can throw a GError. This will happen if the GPU does not support 3D textures or it does not support NPOTs and an NPOT size is requested. It will also fail if the FBO extension is not supported and the COGL_TEXTURE_NO_AUTO_MIPMAP flag is not given. This could be avoided by copying the code for the GL_GENERATE_MIPMAP TexParameter fallback, but in the interests of keeping the code simple this is not yet done. This adds a couple of functions to cogl-texture-driver for uploading 3D data and querying the 3D proxy texture. prep_gl_for_pixels_upload_full now also takes sets the GL_UNPACK_IMAGE_HEIGHT parameter so that 3D textures can have padding between the images. Whenever 3D texture is uploading, both the height of the images and the height of all of the data is specified (either explicitly or implicilty from the CoglBitmap) so that the image height can be deduced by dividing by the depth.
404 lines
17 KiB
C
404 lines
17 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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/* This is included multiple times with different definitions for
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these macros */
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COGL_FEATURE_BEGIN (offscreen, 255, 255,
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/* for some reason the ARB version of this
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extension doesn't have an ARB suffix for the
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functions */
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"ARB:\0EXT\0",
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"framebuffer_object\0",
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COGL_FEATURE_OFFSCREEN,
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0)
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COGL_FEATURE_FUNCTION (void, glGenRenderbuffers,
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(GLsizei n,
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GLuint *renderbuffers))
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COGL_FEATURE_FUNCTION (void, glDeleteRenderbuffers,
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(GLsizei n,
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const GLuint *renderbuffers))
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COGL_FEATURE_FUNCTION (void, glBindRenderbuffer,
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(GLenum target,
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GLuint renderbuffer))
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COGL_FEATURE_FUNCTION (void, glRenderbufferStorage,
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(GLenum target,
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GLenum internalformat,
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GLsizei width,
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GLsizei height))
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COGL_FEATURE_FUNCTION (void, glGenFramebuffers,
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(GLsizei n,
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GLuint *framebuffers))
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COGL_FEATURE_FUNCTION (void, glBindFramebuffer,
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(GLenum target,
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GLuint framebuffer))
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COGL_FEATURE_FUNCTION (void, glFramebufferTexture2D,
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(GLenum target,
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GLenum attachment,
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GLenum textarget,
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GLuint texture,
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GLint level))
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COGL_FEATURE_FUNCTION (void, glFramebufferRenderbuffer,
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(GLenum target,
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GLenum attachment,
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GLenum renderbuffertarget,
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GLuint renderbuffer))
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COGL_FEATURE_FUNCTION (GLenum, glCheckFramebufferStatus,
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(GLenum target))
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COGL_FEATURE_FUNCTION (void, glDeleteFramebuffers,
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(GLsizei n,
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const GLuint *framebuffers))
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COGL_FEATURE_FUNCTION (void, glGenerateMipmap,
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(GLenum target))
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COGL_FEATURE_FUNCTION (void, glGetFramebufferAttachmentParameteriv,
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(GLenum target,
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GLenum attachment,
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GLenum pname,
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GLint *params))
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COGL_FEATURE_END ()
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COGL_FEATURE_BEGIN (offscreen_blit, 255, 255,
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"EXT\0",
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"framebuffer_blit\0",
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COGL_FEATURE_OFFSCREEN_BLIT,
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0)
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COGL_FEATURE_FUNCTION (void, glBlitFramebuffer,
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(GLint srcX0,
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GLint srcY0,
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GLint srcX1,
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GLint srcY1,
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GLint dstX0,
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GLint dstY0,
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GLint dstX1,
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GLint dstY1,
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GLbitfield mask,
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GLenum filter))
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COGL_FEATURE_END ()
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COGL_FEATURE_BEGIN (offscreen_multisample, 255, 255,
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"EXT\0",
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"framebuffer_multisample\0",
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COGL_FEATURE_OFFSCREEN_MULTISAMPLE,
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0)
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COGL_FEATURE_FUNCTION (void, glRenderbufferStorageMultisample,
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(GLenum target,
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GLsizei samples,
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GLenum internalformat,
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GLsizei width,
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GLsizei height))
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COGL_FEATURE_END ()
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COGL_FEATURE_BEGIN (read_pixels_async, 2, 1,
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"EXT\0",
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"pixel_buffer_object\0",
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COGL_FEATURE_PBOS,
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0)
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COGL_FEATURE_END ()
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/* ARB_fragment_program */
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COGL_FEATURE_BEGIN (arbfp, 255, 255,
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"ARB\0",
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"fragment_program\0",
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0,
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COGL_FEATURE_PRIVATE_ARB_FP)
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COGL_FEATURE_FUNCTION (void, glGenPrograms,
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(GLsizei n,
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GLuint *programs))
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COGL_FEATURE_FUNCTION (void, glDeletePrograms,
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(GLsizei n,
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GLuint *programs))
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COGL_FEATURE_FUNCTION (void, glBindProgram,
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(GLenum target,
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GLuint program))
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COGL_FEATURE_FUNCTION (void, glProgramString,
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(GLenum target,
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GLenum format,
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GLsizei len,
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const void *program))
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COGL_FEATURE_FUNCTION (void, glProgramLocalParameter4fv,
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(GLenum target,
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GLuint index,
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GLfloat *params))
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COGL_FEATURE_END ()
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/* The function names in OpenGL 2.0 are different so we can't easily
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just check for GL 2.0 */
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COGL_FEATURE_BEGIN (shaders_glsl, 2, 0,
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"\0",
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"\0",
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COGL_FEATURE_SHADERS_GLSL,
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0)
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COGL_FEATURE_FUNCTION (GLuint, glCreateProgram,
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(void))
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COGL_FEATURE_FUNCTION (GLuint, glCreateShader,
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(GLenum shaderType))
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COGL_FEATURE_FUNCTION (void, glShaderSource,
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(GLuint shader,
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GLsizei count,
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const GLchar **string,
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const GLint *length))
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COGL_FEATURE_FUNCTION (void, glCompileShader,
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(GLuint shader))
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COGL_FEATURE_FUNCTION (void, glDeleteShader,
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(GLuint shader))
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COGL_FEATURE_FUNCTION (void, glAttachShader,
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(GLuint program,
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GLuint shader))
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COGL_FEATURE_FUNCTION (void, glLinkProgram,
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(GLuint program))
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COGL_FEATURE_FUNCTION (void, glUseProgram,
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(GLuint program))
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COGL_FEATURE_FUNCTION (GLint, glGetUniformLocation,
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(GLuint program,
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const GLchar *name))
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COGL_FEATURE_FUNCTION (void, glDeleteProgram,
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(GLuint program))
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COGL_FEATURE_FUNCTION (void, glGetShaderInfoLog,
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(GLuint shader,
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GLsizei maxLength,
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GLsizei *length,
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GLchar *infoLog))
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COGL_FEATURE_FUNCTION (void, glGetShaderiv,
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(GLuint shader,
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GLenum pname,
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GLint *params))
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COGL_FEATURE_FUNCTION (void, glVertexAttribPointer,
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(GLuint index,
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GLint size,
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GLenum type,
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GLboolean normalized,
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GLsizei stride,
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const GLvoid *pointer))
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COGL_FEATURE_FUNCTION (void, glEnableVertexAttribArray,
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(GLuint index))
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COGL_FEATURE_FUNCTION (void, glDisableVertexAttribArray,
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(GLuint index))
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COGL_FEATURE_FUNCTION (void, glUniform1f,
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(GLint location,
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GLfloat v0))
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COGL_FEATURE_FUNCTION (void, glUniform2f,
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(GLint location,
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GLfloat v0,
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GLfloat v1))
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COGL_FEATURE_FUNCTION (void, glUniform3f,
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(GLint location,
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GLfloat v0,
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GLfloat v1,
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GLfloat v2))
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COGL_FEATURE_FUNCTION (void, glUniform4f,
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(GLint location,
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GLfloat v0,
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GLfloat v1,
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GLfloat v2,
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GLfloat v3))
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COGL_FEATURE_FUNCTION (void, glUniform1fv,
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(GLint location,
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GLsizei count,
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const GLfloat * value))
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COGL_FEATURE_FUNCTION (void, glUniform2fv,
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(GLint location,
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GLsizei count,
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const GLfloat * value))
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COGL_FEATURE_FUNCTION (void, glUniform3fv,
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(GLint location,
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GLsizei count,
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const GLfloat * value))
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COGL_FEATURE_FUNCTION (void, glUniform4fv,
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(GLint location,
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GLsizei count,
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const GLfloat * value))
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COGL_FEATURE_FUNCTION (void, glUniform1i,
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(GLint location,
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GLint v0))
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COGL_FEATURE_FUNCTION (void, glUniform2i,
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(GLint location,
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GLint v0,
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GLint v1))
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COGL_FEATURE_FUNCTION (void, glUniform3i,
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(GLint location,
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GLint v0,
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GLint v1,
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GLint v2))
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COGL_FEATURE_FUNCTION (void, glUniform4i,
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(GLint location,
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GLint v0,
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GLint v1,
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GLint v2,
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GLint v3))
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COGL_FEATURE_FUNCTION (void, glUniform1iv,
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(GLint location,
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GLsizei count,
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const GLint * value))
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COGL_FEATURE_FUNCTION (void, glUniform2iv,
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(GLint location,
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GLsizei count,
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const GLint * value))
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COGL_FEATURE_FUNCTION (void, glUniform3iv,
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(GLint location,
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GLsizei count,
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const GLint * value))
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COGL_FEATURE_FUNCTION (void, glUniform4iv,
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(GLint location,
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GLsizei count,
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const GLint * value))
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COGL_FEATURE_FUNCTION (void, glUniformMatrix2fv,
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(GLint location,
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GLsizei count,
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GLboolean transpose,
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const GLfloat *value))
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COGL_FEATURE_FUNCTION (void, glUniformMatrix3fv,
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(GLint location,
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GLsizei count,
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GLboolean transpose,
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const GLfloat *value))
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COGL_FEATURE_FUNCTION (void, glUniformMatrix4fv,
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(GLint location,
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GLsizei count,
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GLboolean transpose,
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const GLfloat *value))
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COGL_FEATURE_END ()
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COGL_FEATURE_BEGIN (vbos, 1, 5,
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"ARB\0",
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"vertex_buffer_object\0",
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COGL_FEATURE_VBOS,
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0)
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COGL_FEATURE_FUNCTION (void, glGenBuffers,
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(GLuint n,
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GLuint *buffers))
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COGL_FEATURE_FUNCTION (void, glBindBuffer,
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(GLenum target,
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GLuint buffer))
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COGL_FEATURE_FUNCTION (void, glBufferData,
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(GLenum target,
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GLsizeiptr size,
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const GLvoid *data,
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GLenum usage))
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COGL_FEATURE_FUNCTION (void, glBufferSubData,
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(GLenum target,
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GLintptr offset,
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GLsizeiptr size,
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const GLvoid *data))
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COGL_FEATURE_FUNCTION (void *, glMapBuffer,
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(GLenum target,
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GLenum access))
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COGL_FEATURE_FUNCTION (GLboolean, glUnmapBuffer,
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(GLenum target))
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COGL_FEATURE_FUNCTION (void, glDeleteBuffers,
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(GLsizei n,
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const GLuint *buffers))
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COGL_FEATURE_END ()
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COGL_FEATURE_BEGIN (texture_rectangle, 255, 255,
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"ARB\0",
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"texture_rectangle\0",
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COGL_FEATURE_TEXTURE_RECTANGLE,
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0)
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COGL_FEATURE_END ()
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/* Cogl requires OpenGL 1.2 so we assume these functions are always
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available and don't bother setting any feature flags. We still have
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to fetch the function pointers though because under Windows you can
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not call any function defined after GL 1.1 directly */
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COGL_FEATURE_BEGIN (in_1_2, 1, 2,
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"\0",
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"\0",
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0,
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0)
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COGL_FEATURE_FUNCTION (void, glDrawRangeElements,
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(GLenum mode,
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GLuint start,
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GLuint end,
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GLsizei count,
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GLenum type,
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const GLvoid *indices))
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COGL_FEATURE_FUNCTION (void, glBlendEquation,
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(GLenum mode))
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COGL_FEATURE_FUNCTION (void, glBlendColor,
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(GLclampf red,
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GLclampf green,
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GLclampf blue,
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GLclampf alpha))
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COGL_FEATURE_END ()
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COGL_FEATURE_BEGIN (texture_3d, 1, 2,
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"\0",
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"\0",
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COGL_FEATURE_TEXTURE_3D,
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0)
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COGL_FEATURE_FUNCTION (void, glTexImage3D,
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(GLenum target, GLint level,
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GLint internalFormat,
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GLsizei width, GLsizei height,
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GLsizei depth, GLint border,
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GLenum format, GLenum type,
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const GLvoid *pixels))
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COGL_FEATURE_END ()
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/* Available in GL 1.3 or the multitexture extension. These are
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required */
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COGL_FEATURE_BEGIN (multitexture, 1, 3,
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"ARB\0",
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"multitexture\0",
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0,
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0)
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COGL_FEATURE_FUNCTION (void, glActiveTexture,
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(GLenum texture))
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COGL_FEATURE_FUNCTION (void, glClientActiveTexture,
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(GLenum texture))
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COGL_FEATURE_END ()
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/* Optional, declared in 1.4 */
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COGL_FEATURE_BEGIN (blend_func_separate, 1, 4,
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"EXT\0",
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"blend_func_separate\0",
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0,
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0)
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COGL_FEATURE_FUNCTION (void, glBlendFuncSeparate,
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(GLenum srcRGB,
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GLenum dstRGB,
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GLenum srcAlpha,
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GLenum dstAlpha))
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COGL_FEATURE_END ()
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/* Optional, declared in 2.0 */
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COGL_FEATURE_BEGIN (blend_equation_separate, 2, 0,
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"EXT\0",
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"blend_equation_separate\0",
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0,
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0)
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COGL_FEATURE_FUNCTION (void, glBlendEquationSeparate,
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(GLenum modeRGB,
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GLenum modeAlpha))
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COGL_FEATURE_END ()
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COGL_FEATURE_BEGIN (point_sprites, 2, 0,
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"ARB\0",
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"point_sprite\0",
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COGL_FEATURE_POINT_SPRITE,
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0)
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COGL_FEATURE_END ()
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