diff options
author | Neil Roberts <neil@linux.intel.com> | 2014-06-10 16:21:21 +0100 |
---|---|---|
committer | Neil Roberts <neil@linux.intel.com> | 2014-07-23 11:50:38 +0100 |
commit | 0779f37e1589b0ba4f1443a889f34dd83607c117 (patch) | |
tree | 871274c17a6b5c95ae1b22f601890171b4b6b230 /src/mesa/drivers/common/meta.c | |
parent | 05b52efbc977311c96ba31ac5fa2c95fe525d85e (diff) |
meta: Add a meta implementation of GL_ARB_clear_texture
Adds an implementation of the ClearTexSubImage driver entry point that tries
to set up an FBO to render to the texture and then calls glClearBuffer with a
scissor to perform the actual clear. If an FBO can't be created for the
texture then it will fall back to using _mesa_store_ClearTexSubImage.
When used in combination with _mesa_store_ClearTexSubImage this should provide
an implementation that works for all DRI-based drivers. However as this has
only been tested with the i965 driver it is currently only enabled there.
v2: Only enable the extension for the i965 driver instead of all DRI drivers.
Remove an unnecessary goto. Don't require GL_ARB_framebuffer_object. Add
some more comments.
v3: Use glClearBuffer* to avoid having to modify glClearColor and friends.
Handle sRGB textures. Explicitly disable dithering.
Reviewed-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
Diffstat (limited to 'src/mesa/drivers/common/meta.c')
-rw-r--r-- | src/mesa/drivers/common/meta.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c index 604bc218b72..b12898f265a 100644 --- a/src/mesa/drivers/common/meta.c +++ b/src/mesa/drivers/common/meta.c @@ -40,6 +40,7 @@ #include "main/blit.h" #include "main/bufferobj.h" #include "main/buffers.h" +#include "main/clear.h" #include "main/colortab.h" #include "main/condrender.h" #include "main/depth.h" @@ -47,6 +48,7 @@ #include "main/fbobject.h" #include "main/feedback.h" #include "main/formats.h" +#include "main/format_unpack.h" #include "main/glformats.h" #include "main/image.h" #include "main/macros.h" @@ -71,6 +73,7 @@ #include "main/teximage.h" #include "main/texparam.h" #include "main/texstate.h" +#include "main/texstore.h" #include "main/transformfeedback.h" #include "main/uniforms.h" #include "main/varray.h" @@ -3347,3 +3350,189 @@ _mesa_meta_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z, _mesa_meta_end(ctx); } + +static bool +cleartexsubimage_color(struct gl_context *ctx, + struct gl_texture_image *texImage, + const GLvoid *clearValue, + GLint zoffset) +{ + mesa_format format; + union gl_color_union colorValue; + GLenum datatype; + GLenum status; + + _mesa_meta_bind_fbo_image(GL_COLOR_ATTACHMENT0, texImage, zoffset); + + status = _mesa_CheckFramebufferStatus(GL_DRAW_FRAMEBUFFER); + if (status != GL_FRAMEBUFFER_COMPLETE) + return false; + + /* We don't want to apply an sRGB conversion so override the format */ + format = _mesa_get_srgb_format_linear(texImage->TexFormat); + datatype = _mesa_get_format_datatype(format); + + switch (datatype) { + case GL_UNSIGNED_INT: + case GL_INT: + if (clearValue) + _mesa_unpack_uint_rgba_row(format, 1, clearValue, + (GLuint (*)[4]) colorValue.ui); + else + memset(&colorValue, 0, sizeof colorValue); + if (datatype == GL_INT) + _mesa_ClearBufferiv(GL_COLOR, 0, colorValue.i); + else + _mesa_ClearBufferuiv(GL_COLOR, 0, colorValue.ui); + break; + default: + if (clearValue) + _mesa_unpack_rgba_row(format, 1, clearValue, + (GLfloat (*)[4]) colorValue.f); + else + memset(&colorValue, 0, sizeof colorValue); + _mesa_ClearBufferfv(GL_COLOR, 0, colorValue.f); + break; + } + + return true; +} + +static bool +cleartexsubimage_depth_stencil(struct gl_context *ctx, + struct gl_texture_image *texImage, + const GLvoid *clearValue, + GLint zoffset) +{ + GLint stencilValue; + GLfloat depthValue; + GLenum status; + + _mesa_meta_bind_fbo_image(GL_DEPTH_ATTACHMENT, texImage, zoffset); + + if (texImage->_BaseFormat == GL_DEPTH_STENCIL) + _mesa_meta_bind_fbo_image(GL_STENCIL_ATTACHMENT, texImage, zoffset); + + status = _mesa_CheckFramebufferStatus(GL_DRAW_FRAMEBUFFER); + if (status != GL_FRAMEBUFFER_COMPLETE) + return false; + + if (clearValue) { + GLuint depthStencilValue[2]; + + /* Convert the clearValue from whatever format it's in to a floating + * point value for the depth and an integer value for the stencil index + */ + _mesa_unpack_float_32_uint_24_8_depth_stencil_row(texImage->TexFormat, + 1, /* n */ + clearValue, + depthStencilValue); + /* We need a memcpy here instead of a cast because we need to + * reinterpret the bytes as a float rather than converting it + */ + memcpy(&depthValue, depthStencilValue, sizeof depthValue); + stencilValue = depthStencilValue[1] & 0xff; + } else { + depthValue = 0.0f; + stencilValue = 0; + } + + if (texImage->_BaseFormat == GL_DEPTH_STENCIL) + _mesa_ClearBufferfi(GL_DEPTH_STENCIL, 0, depthValue, stencilValue); + else + _mesa_ClearBufferfv(GL_DEPTH, 0, &depthValue); + + return true; +} + +static bool +cleartexsubimage_for_zoffset(struct gl_context *ctx, + struct gl_texture_image *texImage, + GLint zoffset, + const GLvoid *clearValue) +{ + GLuint fbo; + bool success; + + _mesa_GenFramebuffers(1, &fbo); + _mesa_BindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo); + + switch(texImage->_BaseFormat) { + case GL_DEPTH_STENCIL: + case GL_DEPTH_COMPONENT: + success = cleartexsubimage_depth_stencil(ctx, texImage, + clearValue, zoffset); + break; + default: + success = cleartexsubimage_color(ctx, texImage, clearValue, zoffset); + break; + } + + _mesa_DeleteFramebuffers(1, &fbo); + + return success; +} + +static bool +cleartexsubimage_using_fbo(struct gl_context *ctx, + struct gl_texture_image *texImage, + GLint xoffset, GLint yoffset, GLint zoffset, + GLsizei width, GLsizei height, GLsizei depth, + const GLvoid *clearValue) +{ + bool success = true; + GLint z; + + _mesa_meta_begin(ctx, + MESA_META_SCISSOR | + MESA_META_COLOR_MASK | + MESA_META_DITHER | + MESA_META_FRAMEBUFFER_SRGB); + + _mesa_set_enable(ctx, GL_DITHER, GL_FALSE); + + _mesa_set_enable(ctx, GL_SCISSOR_TEST, GL_TRUE); + _mesa_Scissor(xoffset, yoffset, width, height); + + for (z = zoffset; z < zoffset + depth; z++) { + if (!cleartexsubimage_for_zoffset(ctx, texImage, z, clearValue)) { + success = false; + break; + } + } + + _mesa_meta_end(ctx); + + return success; +} + +extern void +_mesa_meta_ClearTexSubImage(struct gl_context *ctx, + struct gl_texture_image *texImage, + GLint xoffset, GLint yoffset, GLint zoffset, + GLsizei width, GLsizei height, GLsizei depth, + const GLvoid *clearValue) +{ + bool res; + + _mesa_unlock_texture(ctx, texImage->TexObject); + + res = cleartexsubimage_using_fbo(ctx, texImage, + xoffset, yoffset, zoffset, + width, height, depth, + clearValue); + + _mesa_lock_texture(ctx, texImage->TexObject); + + if (res) + return; + + _mesa_warning(ctx, + "Falling back to mapping the texture in " + "glClearTexSubImage\n"); + + _mesa_store_cleartexsubimage(ctx, texImage, + xoffset, yoffset, zoffset, + width, height, depth, + clearValue); +} |