/** * Determine if fast color clear supports the given clear color. * * Fast color clear can only clear to color values of 1.0 or 0.0. At the * moment we only support floating point, unorm, and snorm buffers. */ static bool is_color_fast_clear_compatible(struct brw_context *brw, mesa_format format, const union gl_color_union *color) { if (_mesa_is_format_integer_color(format)) { if (brw->gen >= 8) { perf_debug("Integer fast clear not enabled for (%s)", _mesa_get_format_name(format)); } return false; } for (int i = 0; i < 4; i++) { if (!_mesa_format_has_color_component(format, i)) { continue; } if (brw->gen < 9 && color->f[i] != 0.0f && color->f[i] != 1.0f) { return false; } } return true; }
/** * Convert the given color to a bitfield suitable for ORing into DWORD 7 of * SURFACE_STATE (DWORD 12-15 on SKL+). */ static void set_fast_clear_color(struct brw_context *brw, struct intel_mipmap_tree *mt, const union gl_color_union *color) { union gl_color_union override_color = *color; /* The sampler doesn't look at the format of the surface when the fast * clear color is used so we need to implement luminance, intensity and * missing components manually. */ switch (_mesa_get_format_base_format(mt->format)) { case GL_INTENSITY: override_color.ui[3] = override_color.ui[0]; /* flow through */ case GL_LUMINANCE: case GL_LUMINANCE_ALPHA: override_color.ui[1] = override_color.ui[0]; override_color.ui[2] = override_color.ui[0]; break; default: for (int i = 0; i < 3; i++) { if (!_mesa_format_has_color_component(mt->format, i)) override_color.ui[i] = 0; } break; } if (!_mesa_format_has_color_component(mt->format, 3)) { if (_mesa_is_format_integer_color(mt->format)) override_color.ui[3] = 1; else override_color.f[3] = 1.0f; } /* Handle linear→SRGB conversion */ if (brw->ctx.Color.sRGBEnabled && _mesa_get_srgb_format_linear(mt->format) != mt->format) { for (int i = 0; i < 3; i++) { override_color.f[i] = util_format_linear_to_srgb_float(override_color.f[i]); } } if (brw->gen >= 9) { mt->gen9_fast_clear_color = override_color; } else { mt->fast_clear_color_value = 0; for (int i = 0; i < 4; i++) { /* Testing for non-0 works for integer and float colors */ if (override_color.f[i] != 0.0f) { mt->fast_clear_color_value |= 1 << (GEN7_SURFACE_CLEAR_COLOR_SHIFT + (3 - i)); } } } }
/** * Determine if fast color clear supports the given clear color. * * Fast color clear can only clear to color values of 1.0 or 0.0. At the * moment we only support floating point, unorm, and snorm buffers. */ static bool is_color_fast_clear_compatible(struct brw_context *brw, mesa_format format, const union gl_color_union *color) { if (_mesa_is_format_integer_color(format)) return false; for (int i = 0; i < 4; i++) { if (color->f[i] != 0.0 && color->f[i] != 1.0 && _mesa_format_has_color_component(format, i)) { return false; } } return true; }
/** * Determine if fast color clear supports the given clear color. * * Fast color clear can only clear to color values of 1.0 or 0.0. At the * moment we only support floating point, unorm, and snorm buffers. */ static bool is_color_fast_clear_compatible(struct brw_context *brw, gl_format format, const union gl_color_union *color) { if (_mesa_is_format_integer_color(format)) return false; for (int i = 0; i < 4; i++) { if (color->f[i] != 0.0 && color->f[i] != 1.0) { perf_debug("Clear color unsupported by fast color clear. " "Falling back to slow clear.\n"); return false; } } return true; }
/** * Determine if fast color clear supports the given clear color. * * Fast color clear can only clear to color values of 1.0 or 0.0. At the * moment we only support floating point, unorm, and snorm buffers. */ bool brw_is_color_fast_clear_compatible(struct brw_context *brw, const struct intel_mipmap_tree *mt, const union gl_color_union *color) { const struct gen_device_info *devinfo = &brw->screen->devinfo; const struct gl_context *ctx = &brw->ctx; /* If we're mapping the render format to a different format than the * format we use for texturing then it is a bit questionable whether it * should be possible to use a fast clear. Although we only actually * render using a renderable format, without the override workaround it * wouldn't be possible to have a non-renderable surface in a fast clear * state so the hardware probably legitimately doesn't need to support * this case. At least on Gen9 this really does seem to cause problems. */ if (devinfo->gen >= 9 && brw_isl_format_for_mesa_format(mt->format) != brw->mesa_to_isl_render_format[mt->format]) return false; const mesa_format format = _mesa_get_render_format(ctx, mt->format); if (_mesa_is_format_integer_color(format)) { if (devinfo->gen >= 8) { perf_debug("Integer fast clear not enabled for (%s)", _mesa_get_format_name(format)); } return false; } for (int i = 0; i < 4; i++) { if (!_mesa_format_has_color_component(format, i)) { continue; } if (devinfo->gen < 9 && color->f[i] != 0.0f && color->f[i] != 1.0f) { return false; } } return true; }
void GLAPIENTRY _mesa_ReadnPixelsARB( GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLsizei bufSize, GLvoid *pixels ) { GLenum err = GL_NO_ERROR; struct gl_renderbuffer *rb; GET_CURRENT_CONTEXT(ctx); FLUSH_VERTICES(ctx, 0); FLUSH_CURRENT(ctx, 0); if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glReadPixels(%d, %d, %s, %s, %p)\n", width, height, _mesa_lookup_enum_by_nr(format), _mesa_lookup_enum_by_nr(type), pixels); if (width < 0 || height < 0) { _mesa_error( ctx, GL_INVALID_VALUE, "glReadPixels(width=%d height=%d)", width, height ); return; } if (ctx->NewState) _mesa_update_state(ctx); if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, "glReadPixels(incomplete framebuffer)" ); return; } rb = _mesa_get_read_renderbuffer_for_format(ctx, format); if (rb == NULL) { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(read buffer)"); return; } /* OpenGL ES 1.x and OpenGL ES 2.0 impose additional restrictions on the * combinations of format and type that can be used. * * Technically, only two combinations are actually allowed: * GL_RGBA/GL_UNSIGNED_BYTE, and some implementation-specific internal * preferred combination. This code doesn't know what that preferred * combination is, and Mesa can handle anything valid. Just work instead. */ if (_mesa_is_gles(ctx)) { if (ctx->API == API_OPENGLES2 && _mesa_is_color_format(format) && _mesa_get_color_read_format(ctx) == format && _mesa_get_color_read_type(ctx) == type) { err = GL_NO_ERROR; } else if (ctx->Version < 30) { err = _mesa_es_error_check_format_and_type(format, type, 2); if (err == GL_NO_ERROR) { if (type == GL_FLOAT || type == GL_HALF_FLOAT_OES) { err = GL_INVALID_OPERATION; } } } else { err = read_pixels_es3_error_check(format, type, rb); } if (err == GL_NO_ERROR && (format == GL_DEPTH_COMPONENT || format == GL_DEPTH_STENCIL)) { err = GL_INVALID_ENUM; } if (err != GL_NO_ERROR) { _mesa_error(ctx, err, "glReadPixels(invalid format %s and/or type %s)", _mesa_lookup_enum_by_nr(format), _mesa_lookup_enum_by_nr(type)); return; } } err = _mesa_error_check_format_and_type(ctx, format, type); if (err != GL_NO_ERROR) { _mesa_error(ctx, err, "glReadPixels(invalid format %s and/or type %s)", _mesa_lookup_enum_by_nr(format), _mesa_lookup_enum_by_nr(type)); return; } if (_mesa_is_user_fbo(ctx->ReadBuffer) && ctx->ReadBuffer->Visual.samples > 0) { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(multisample FBO)"); return; } if (!_mesa_source_buffer_exists(ctx, format)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(no readbuffer)"); return; } /* Check that the destination format and source buffer are both * integer-valued or both non-integer-valued. */ if (ctx->Extensions.EXT_texture_integer && _mesa_is_color_format(format)) { const struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; const GLboolean srcInteger = _mesa_is_format_integer_color(rb->Format); const GLboolean dstInteger = _mesa_is_enum_format_integer(format); if (dstInteger != srcInteger) { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(integer / non-integer format mismatch"); return; } } if (width == 0 || height == 0) return; /* nothing to do */ if (!_mesa_validate_pbo_access(2, &ctx->Pack, width, height, 1, format, type, bufSize, pixels)) { if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(out of bounds PBO access)"); } else { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadnPixelsARB(out of bounds access:" " bufSize (%d) is too small)", bufSize); } return; } if (_mesa_is_bufferobj(ctx->Pack.BufferObj) && _mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) { /* buffer is mapped - that's an error */ _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)"); return; } ctx->Driver.ReadPixels(ctx, x, y, width, height, format, type, &ctx->Pack, pixels); }
void GLAPIENTRY _mesa_ReadnPixelsARB( GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLsizei bufSize, GLvoid *pixels ) { GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); FLUSH_CURRENT(ctx, 0); if (MESA_VERBOSE & VERBOSE_API) _mesa_debug(ctx, "glReadPixels(%d, %d, %s, %s, %p)\n", width, height, _mesa_lookup_enum_by_nr(format), _mesa_lookup_enum_by_nr(type), pixels); if (width < 0 || height < 0) { _mesa_error( ctx, GL_INVALID_VALUE, "glReadPixels(width=%d height=%d)", width, height ); return; } if (ctx->NewState) _mesa_update_state(ctx); if (_mesa_error_check_format_type(ctx, format, type, GL_FALSE)) { /* found an error */ return; } /* Check that the destination format and source buffer are both * integer-valued or both non-integer-valued. */ if (ctx->Extensions.EXT_texture_integer && _mesa_is_color_format(format)) { const struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer; const GLboolean srcInteger = _mesa_is_format_integer_color(rb->Format); const GLboolean dstInteger = _mesa_is_integer_format(format); if (dstInteger != srcInteger) { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(integer / non-integer format mismatch"); return; } } if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, "glReadPixels(incomplete framebuffer)" ); return; } if (ctx->ReadBuffer->Name != 0 && ctx->ReadBuffer->Visual.samples > 0) { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(multisample FBO)"); return; } if (!_mesa_source_buffer_exists(ctx, format)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(no readbuffer)"); return; } if (width == 0 || height == 0) return; /* nothing to do */ if (!_mesa_validate_pbo_access(2, &ctx->Pack, width, height, 1, format, type, bufSize, pixels)) { if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(out of bounds PBO access)"); } else { _mesa_error(ctx, GL_INVALID_OPERATION, "glReadnPixelsARB(out of bounds access:" " bufSize (%d) is too small)", bufSize); } return; } if (_mesa_is_bufferobj(ctx->Pack.BufferObj) && _mesa_bufferobj_mapped(ctx->Pack.BufferObj)) { /* buffer is mapped - that's an error */ _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(PBO is mapped)"); return; } ctx->Driver.ReadPixels(ctx, x, y, width, height, format, type, &ctx->Pack, pixels); }
/** * Helper for _mesa_meta_CopyTexSubImage1/2/3D() functions. * Have to be careful with locking and meta state for pixel transfer. */ static void copy_tex_sub_image(struct gl_context *ctx, GLuint dims, struct gl_texture_image *texImage, GLint xoffset, GLint yoffset, GLint zoffset, struct gl_renderbuffer *rb, GLint x, GLint y, GLsizei width, GLsizei height) { struct gl_texture_object *texObj = texImage->TexObject; const GLenum target = texObj->Target; GLenum format, type; GLint bpp; void *buf; /* Choose format/type for temporary image buffer */ format = _mesa_get_format_base_format(texImage->TexFormat); if (format == GL_LUMINANCE || format == GL_LUMINANCE_ALPHA || format == GL_INTENSITY) { /* We don't want to use GL_LUMINANCE, GL_INTENSITY, etc. for the * temp image buffer because glReadPixels will do L=R+G+B which is * not what we want (should be L=R). */ format = GL_RGBA; } if (_mesa_is_format_integer_color(texImage->TexFormat)) { _mesa_problem(ctx, "unsupported integer color copyteximage"); return; } type = get_temp_image_type(ctx, format); bpp = _mesa_bytes_per_pixel(format, type); if (bpp <= 0) { _mesa_problem(ctx, "Bad bpp in meta copy_tex_sub_image()"); return; } /* * Alloc image buffer (XXX could use a PBO) */ buf = malloc(width * height * bpp); if (!buf) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage%uD", dims); return; } _mesa_unlock_texture(ctx, texObj); /* need to unlock first */ /* * Read image from framebuffer (disable pixel transfer ops) */ _mesa_meta_begin(ctx, MESA_META_PIXEL_STORE | MESA_META_PIXEL_TRANSFER); ctx->Driver.ReadPixels(ctx, x, y, width, height, format, type, &ctx->Pack, buf); _mesa_meta_end(ctx); _mesa_update_state(ctx); /* to update pixel transfer state */ /* * Store texture data (with pixel transfer ops) */ _mesa_meta_begin(ctx, MESA_META_PIXEL_STORE); if (target == GL_TEXTURE_1D) { ctx->Driver.TexSubImage1D(ctx, texImage, xoffset, width, format, type, buf, &ctx->Unpack); } else { ctx->Driver.TexSubImage2D(ctx, texImage, xoffset, yoffset, width, height, format, type, buf, &ctx->Unpack); } _mesa_meta_end(ctx); _mesa_lock_texture(ctx, texObj); /* re-lock */ free(buf); }
/** * Convert the given color to a bitfield suitable for ORing into DWORD 7 of * SURFACE_STATE (DWORD 12-15 on SKL+). */ union isl_color_value brw_meta_convert_fast_clear_color(const struct brw_context *brw, const struct intel_mipmap_tree *mt, const union gl_color_union *color) { union isl_color_value override_color = { .u32 = { color->ui[0], color->ui[1], color->ui[2], color->ui[3], }, }; /* The sampler doesn't look at the format of the surface when the fast * clear color is used so we need to implement luminance, intensity and * missing components manually. */ switch (_mesa_get_format_base_format(mt->format)) { case GL_INTENSITY: override_color.u32[3] = override_color.u32[0]; /* flow through */ case GL_LUMINANCE: case GL_LUMINANCE_ALPHA: override_color.u32[1] = override_color.u32[0]; override_color.u32[2] = override_color.u32[0]; break; default: for (int i = 0; i < 3; i++) { if (!_mesa_format_has_color_component(mt->format, i)) override_color.u32[i] = 0; } break; } switch (_mesa_get_format_datatype(mt->format)) { case GL_UNSIGNED_NORMALIZED: for (int i = 0; i < 4; i++) override_color.f32[i] = CLAMP(override_color.f32[i], 0.0f, 1.0f); break; case GL_SIGNED_NORMALIZED: for (int i = 0; i < 4; i++) override_color.f32[i] = CLAMP(override_color.f32[i], -1.0f, 1.0f); break; case GL_UNSIGNED_INT: for (int i = 0; i < 4; i++) { unsigned bits = _mesa_get_format_bits(mt->format, GL_RED_BITS + i); if (bits < 32) { uint32_t max = (1u << bits) - 1; override_color.u32[i] = MIN2(override_color.u32[i], max); } } break; case GL_INT: for (int i = 0; i < 4; i++) { unsigned bits = _mesa_get_format_bits(mt->format, GL_RED_BITS + i); if (bits < 32) { int32_t max = (1 << (bits - 1)) - 1; int32_t min = -(1 << (bits - 1)); override_color.i32[i] = CLAMP(override_color.i32[i], min, max); } } break; case GL_FLOAT: if (!_mesa_is_format_signed(mt->format)) { for (int i = 0; i < 4; i++) override_color.f32[i] = MAX2(override_color.f32[i], 0.0f); } break; } if (!_mesa_format_has_color_component(mt->format, 3)) { if (_mesa_is_format_integer_color(mt->format)) override_color.u32[3] = 1; else override_color.f32[3] = 1.0f; } /* Handle linear to SRGB conversion */ if (brw->ctx.Color.sRGBEnabled && _mesa_get_srgb_format_linear(mt->format) != mt->format) { for (int i = 0; i < 3; i++) { override_color.f32[i] = util_format_linear_to_srgb_float(override_color.f32[i]); } } return override_color; }
/** * Get an uncompressed color texture image. */ static void get_tex_rgba_uncompressed(struct gl_context *ctx, GLuint dimensions, GLenum format, GLenum type, GLvoid *pixels, struct gl_texture_image *texImage, GLbitfield transferOps) { /* don't want to apply sRGB -> RGB conversion here so override the format */ const gl_format texFormat = _mesa_get_srgb_format_linear(texImage->TexFormat); const GLuint width = texImage->Width; const GLenum destBaseFormat = _mesa_base_tex_format(ctx, format); GLenum rebaseFormat = GL_NONE; GLuint height = texImage->Height; GLuint depth = texImage->Depth; GLuint img, row; GLfloat (*rgba)[4]; GLuint (*rgba_uint)[4]; GLboolean tex_is_integer = _mesa_is_format_integer_color(texImage->TexFormat); GLboolean tex_is_uint = _mesa_is_format_unsigned(texImage->TexFormat); /* Allocate buffer for one row of texels */ rgba = (GLfloat (*)[4]) malloc(4 * width * sizeof(GLfloat)); rgba_uint = (GLuint (*)[4]) rgba; if (!rgba) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()"); return; } if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY) { depth = height; height = 1; } if (texImage->_BaseFormat == GL_LUMINANCE || texImage->_BaseFormat == GL_INTENSITY || texImage->_BaseFormat == GL_LUMINANCE_ALPHA) { /* If a luminance (or intensity) texture is read back as RGB(A), the * returned value should be (L,0,0,1), not (L,L,L,1). Set rebaseFormat * here to get G=B=0. */ rebaseFormat = texImage->_BaseFormat; } else if ((texImage->_BaseFormat == GL_RGBA || texImage->_BaseFormat == GL_RGB || texImage->_BaseFormat == GL_RG) && (destBaseFormat == GL_LUMINANCE || destBaseFormat == GL_LUMINANCE_ALPHA || destBaseFormat == GL_LUMINANCE_INTEGER_EXT || destBaseFormat == GL_LUMINANCE_ALPHA_INTEGER_EXT)) { /* If we're reading back an RGB(A) texture as luminance then we need * to return L=tex(R). Note, that's different from glReadPixels which * returns L=R+G+B. */ rebaseFormat = GL_LUMINANCE_ALPHA; /* this covers GL_LUMINANCE too */ } for (img = 0; img < depth; img++) { GLubyte *srcMap; GLint rowstride; /* map src texture buffer */ ctx->Driver.MapTextureImage(ctx, texImage, img, 0, 0, width, height, GL_MAP_READ_BIT, &srcMap, &rowstride); if (srcMap) { for (row = 0; row < height; row++) { const GLubyte *src = srcMap + row * rowstride; void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, width, height, format, type, img, row, 0); if (tex_is_integer) { _mesa_unpack_uint_rgba_row(texFormat, width, src, rgba_uint); if (rebaseFormat) _mesa_rebase_rgba_uint(width, rgba_uint, rebaseFormat); if (tex_is_uint) { _mesa_pack_rgba_span_from_uints(ctx, width, (GLuint (*)[4]) rgba_uint, format, type, dest); } else { _mesa_pack_rgba_span_from_ints(ctx, width, (GLint (*)[4]) rgba_uint, format, type, dest); } } else { _mesa_unpack_rgba_row(texFormat, width, src, rgba); if (rebaseFormat) _mesa_rebase_rgba_float(width, rgba, rebaseFormat); _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) rgba, format, type, dest, &ctx->Pack, transferOps); } } /* Unmap the src texture buffer */ ctx->Driver.UnmapTextureImage(ctx, texImage, img); } else { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); break; } } free(rgba); }