diff options
Diffstat (limited to 'mesalib/src/mesa/drivers/common/meta_copy_image.c')
| -rw-r--r-- | mesalib/src/mesa/drivers/common/meta_copy_image.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/mesalib/src/mesa/drivers/common/meta_copy_image.c b/mesalib/src/mesa/drivers/common/meta_copy_image.c new file mode 100644 index 000000000..c40c2f011 --- /dev/null +++ b/mesalib/src/mesa/drivers/common/meta_copy_image.c @@ -0,0 +1,199 @@ +/* + * Mesa 3-D graphics library + * + * Copyright (C) 2014 Intel Corporation. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#include "glheader.h" +#include "context.h" +#include "enums.h" +#include "imports.h" +#include "macros.h" +#include "teximage.h" +#include "texobj.h" +#include "fbobject.h" +#include "buffers.h" +#include "state.h" +#include "mtypes.h" +#include "meta.h" + +/* This function makes a texture view without bothering with all of the API + * checks. Most of them are the same for CopyTexSubImage so checking would + * be redundant. The one major difference is that we don't check for + * whether the texture is immutable or not. However, since the view will + * be created and then immediately destroyed, this should not be a problem. + */ +static bool +make_view(struct gl_context *ctx, struct gl_texture_image *tex_image, + struct gl_texture_image **view_tex_image, GLuint *view_tex_name, + GLenum internal_format) +{ + struct gl_texture_object *tex_obj = tex_image->TexObject; + struct gl_texture_object *view_tex_obj; + mesa_format tex_format; + + /* Set up the new texture object */ + _mesa_GenTextures(1, view_tex_name); + view_tex_obj = _mesa_lookup_texture(ctx, *view_tex_name); + if (!view_tex_obj) + return false; + + tex_format = _mesa_choose_texture_format(ctx, view_tex_obj, tex_obj->Target, + 0, internal_format, + GL_NONE, GL_NONE); + + if (!ctx->Driver.TestProxyTexImage(ctx, tex_obj->Target, 0, tex_format, + tex_image->Width, tex_image->Height, + tex_image->Depth, 0)) { + return false; + } + + view_tex_obj->Target = tex_obj->Target; + + *view_tex_image = _mesa_get_tex_image(ctx, view_tex_obj, tex_obj->Target, 0); + _mesa_init_teximage_fields(ctx, *view_tex_image, + tex_image->Width, tex_image->Height, + tex_image->Depth, + 0, internal_format, tex_format); + + view_tex_obj->MinLevel = 0; + view_tex_obj->NumLevels = 1; + view_tex_obj->MinLayer = tex_obj->MinLayer; + view_tex_obj->NumLayers = tex_obj->NumLayers; + view_tex_obj->Immutable = tex_obj->Immutable; + view_tex_obj->ImmutableLevels = tex_obj->ImmutableLevels; + view_tex_obj->Target = tex_obj->Target; + + if (ctx->Driver.TextureView != NULL && + !ctx->Driver.TextureView(ctx, view_tex_obj, tex_obj)) { + _mesa_DeleteTextures(1, view_tex_name); + *view_tex_name = 0; + return false; /* driver recorded error */ + } + + return true; +} + +/** A partial implementation of glCopyImageSubData + * + * This is a partial implementation of glCopyImageSubData that works only + * if both textures are uncompressed and the destination texture is + * renderable. It uses a slight abuse of a texture view (see make_view) to + * turn the source texture into the destination texture type and then uses + * _mesa_meta_BlitFramebuffers to do the copy. + */ +bool +_mesa_meta_CopyImageSubData_uncompressed(struct gl_context *ctx, + struct gl_texture_image *src_tex_image, + int src_x, int src_y, int src_z, + struct gl_texture_image *dst_tex_image, + int dst_x, int dst_y, int dst_z, + int src_width, int src_height) +{ + GLuint src_view_texture = 0; + struct gl_texture_image *src_view_tex_image; + GLuint fbos[2]; + bool success = false; + GLbitfield mask; + GLenum status, attachment; + + if (_mesa_is_format_compressed(dst_tex_image->TexFormat)) + return false; + + if (_mesa_is_format_compressed(src_tex_image->TexFormat)) + return false; + + if (src_tex_image->InternalFormat == dst_tex_image->InternalFormat) { + src_view_tex_image = src_tex_image; + } else { + if (!make_view(ctx, src_tex_image, &src_view_tex_image, &src_view_texture, + dst_tex_image->InternalFormat)) + goto cleanup; + } + + /* We really only need to stash the bound framebuffers. */ + _mesa_meta_begin(ctx, 0); + + _mesa_GenFramebuffers(2, fbos); + _mesa_BindFramebuffer(GL_READ_FRAMEBUFFER, fbos[0]); + _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, fbos[1]); + + switch (_mesa_get_format_base_format(src_tex_image->TexFormat)) { + case GL_DEPTH_COMPONENT: + attachment = GL_DEPTH_ATTACHMENT; + mask = GL_DEPTH_BUFFER_BIT; + break; + case GL_DEPTH_STENCIL: + attachment = GL_DEPTH_STENCIL_ATTACHMENT; + mask = GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT; + break; + case GL_STENCIL_INDEX: + attachment = GL_STENCIL_ATTACHMENT; + mask = GL_STENCIL_BUFFER_BIT; + break; + default: + attachment = GL_COLOR_ATTACHMENT0; + mask = GL_COLOR_BUFFER_BIT; + _mesa_DrawBuffer(GL_COLOR_ATTACHMENT0); + _mesa_ReadBuffer(GL_COLOR_ATTACHMENT0); + } + + _mesa_meta_bind_fbo_image(GL_READ_FRAMEBUFFER, attachment, + src_view_tex_image, src_z); + + status = _mesa_CheckFramebufferStatus(GL_READ_FRAMEBUFFER); + if (status != GL_FRAMEBUFFER_COMPLETE) + goto meta_end; + + _mesa_meta_bind_fbo_image(GL_DRAW_FRAMEBUFFER, attachment, + dst_tex_image, dst_z); + + status = _mesa_CheckFramebufferStatus(GL_DRAW_FRAMEBUFFER); + if (status != GL_FRAMEBUFFER_COMPLETE) + goto meta_end; + + /* Since we've bound a new draw framebuffer, we need to update its + * derived state -- _Xmin, etc -- for BlitFramebuffer's clipping to + * be correct. + */ + _mesa_update_state(ctx); + + /* We skip the core BlitFramebuffer checks for format consistency. + * We have already created views to ensure that the texture formats + * match. + */ + ctx->Driver.BlitFramebuffer(ctx, src_x, src_y, + src_x + src_width, src_y + src_height, + dst_x, dst_y, + dst_x + src_width, dst_y + src_height, + mask, GL_NEAREST); + + success = true; + +meta_end: + _mesa_DeleteFramebuffers(2, fbos); + _mesa_meta_end(ctx); + +cleanup: + _mesa_DeleteTextures(1, &src_view_texture); + + return success; +} |