/** * If the format of the src renderbuffer and the format of the dest * texture are compatible (in terms of blitting), return a TGSI writemask * to be used during the blit. * If the src/dest are incompatible, return 0. */ static unsigned compatible_src_dst_formats(struct gl_context *ctx, const struct gl_renderbuffer *src, const struct gl_texture_image *dst) { /* Get logical base formats for the src and dest. * That is, use the user-requested formats and not the actual, device- * chosen formats. * For example, the user may have requested an A8 texture but the * driver may actually be using an RGBA texture format. When we * copy/blit to that texture, we only want to copy the Alpha channel * and not the RGB channels. * * Similarly, when the src FBO was created an RGB format may have been * requested but the driver actually chose an RGBA format. In that case, * we don't want to copy the undefined Alpha channel to the dest texture * (it should be 1.0). */ const GLenum srcFormat = _mesa_base_fbo_format(ctx, src->InternalFormat); const GLenum dstFormat = _mesa_base_tex_format(ctx, dst->InternalFormat); /** * XXX when we have red-only and red/green renderbuffers we'll need * to add more cases here (or implement a general-purpose routine that * queries the existance of the R,G,B,A channels in the src and dest). */ if (srcFormat == dstFormat) { /* This is the same as matching_base_formats, which should * always pass, as it did previously. */ return TGSI_WRITEMASK_XYZW; } else if (srcFormat == GL_RGB && dstFormat == GL_RGBA) { /* Make sure that A in the dest is 1. The actual src format * may be RGBA and have undefined A values. */ return TGSI_WRITEMASK_XYZ; } else if (srcFormat == GL_RGBA && dstFormat == GL_RGB) { /* Make sure that A in the dest is 1. The actual dst format * may be RGBA and will need A=1 to provide proper alpha values * when sampled later. */ return TGSI_WRITEMASK_XYZ; } else { if (ST_DEBUG & DEBUG_FALLBACK) debug_printf("%s failed for src %s, dst %s\n", __FUNCTION__, _mesa_lookup_enum_by_nr(srcFormat), _mesa_lookup_enum_by_nr(dstFormat)); /* Otherwise fail. */ return 0; } }
GLboolean _mesa_is_legal_tex_storage_format(const struct gl_context *ctx, GLenum internalformat) { /* check internal format - note that only sized formats are allowed */ switch (internalformat) { case GL_ALPHA: case GL_LUMINANCE: case GL_LUMINANCE_ALPHA: case GL_INTENSITY: case GL_RED: case GL_RG: case GL_RGB: case GL_RGBA: case GL_BGRA: case GL_DEPTH_COMPONENT: case GL_DEPTH_STENCIL: case GL_COMPRESSED_ALPHA: case GL_COMPRESSED_LUMINANCE_ALPHA: case GL_COMPRESSED_LUMINANCE: case GL_COMPRESSED_INTENSITY: case GL_COMPRESSED_RGB: case GL_COMPRESSED_RGBA: case GL_COMPRESSED_SRGB: case GL_COMPRESSED_SRGB_ALPHA: case GL_COMPRESSED_SLUMINANCE: case GL_COMPRESSED_SLUMINANCE_ALPHA: case GL_RED_INTEGER: case GL_GREEN_INTEGER: case GL_BLUE_INTEGER: case GL_ALPHA_INTEGER: case GL_RGB_INTEGER: case GL_RGBA_INTEGER: case GL_BGR_INTEGER: case GL_BGRA_INTEGER: case GL_LUMINANCE_INTEGER_EXT: case GL_LUMINANCE_ALPHA_INTEGER_EXT: /* these unsized formats are illegal */ return GL_FALSE; default: return _mesa_base_tex_format(ctx, internalformat) > 0; } }
static bool _is_internalformat_supported(struct gl_context *ctx, GLenum target, GLenum internalformat) { /* From the ARB_internalformat_query2 specification: * * "- INTERNALFORMAT_SUPPORTED: If <internalformat> is an internal format * that is supported by the implementation in at least some subset of * possible operations, TRUE is written to <params>. If <internalformat> * if not a valid token for any internal format usage, FALSE is returned. * * <internalformats> that must be supported (in GL 4.2 or later) include * the following: * - "sized internal formats" from Table 3.12, 3.13, and 3.15, * - any specific "compressed internal format" from Table 3.14, * - any "image unit format" from Table 3.21. * - any generic "compressed internal format" from Table 3.14, if the * implementation accepts it for any texture specification commands, and * - unsized or base internal format, if the implementation accepts * it for texture or image specification. */ GLint buffer[1]; /* At this point an internalformat is valid if it is valid as a texture or * as a renderbuffer format. The checks are different because those methods * return different values when passing non supported internalformats */ if (_mesa_base_tex_format(ctx, internalformat) < 0 && _mesa_base_fbo_format(ctx, internalformat) == 0) return false; /* Let the driver have the final word */ ctx->Driver.QueryInternalFormat(ctx, target, internalformat, GL_INTERNALFORMAT_SUPPORTED, buffer); return (buffer[0] == GL_TRUE); }
void GLAPIENTRY _mesa_GetInternalformativ(GLenum target, GLenum internalformat, GLenum pname, GLsizei bufSize, GLint *params) { GLint buffer[16]; GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END(ctx); /* ARB_internalformat_query is also mandatory for ARB_internalformat_query2 */ if (!(_mesa_has_ARB_internalformat_query(ctx) || _mesa_is_gles3(ctx))) { _mesa_error(ctx, GL_INVALID_OPERATION, "glGetInternalformativ"); return; } assert(ctx->Driver.QueryInternalFormat != NULL); if (!_legal_parameters(ctx, target, internalformat, pname, bufSize, params)) return; /* initialize the contents of the temporary buffer */ memcpy(buffer, params, MIN2(bufSize, 16) * sizeof(GLint)); /* Use the 'unsupported' response defined by the spec for every pname * as the default answer. */ _set_default_response(pname, buffer); if (!_is_target_supported(ctx, target) || !_is_internalformat_supported(ctx, target, internalformat) || !_is_resource_supported(ctx, target, internalformat, pname)) goto end; switch (pname) { case GL_SAMPLES: /* fall-through */ case GL_NUM_SAMPLE_COUNTS: /* The ARB_internalformat_query2 sets the response as 'unsupported' for * SAMPLES and NUM_SAMPLE_COUNTS: * * "If <internalformat> is not color-renderable, depth-renderable, or * stencil-renderable (as defined in section 4.4.4), or if <target> * does not support multiple samples (ie other than * TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY, * or RENDERBUFFER)." */ if ((target != GL_RENDERBUFFER && target != GL_TEXTURE_2D_MULTISAMPLE && target != GL_TEXTURE_2D_MULTISAMPLE_ARRAY) || !_is_renderable(ctx, internalformat)) goto end; /* The GL ES 3.0 specification, section 6.1.15 page 236 says: * * "Since multisampling is not supported for signed and unsigned * integer internal formats, the value of NUM_SAMPLE_COUNTS will be * zero for such formats. * * Since OpenGL ES 3.1 adds support for multisampled integer formats, we * have to check the version for 30 exactly. */ if (pname == GL_NUM_SAMPLE_COUNTS && ctx->API == API_OPENGLES2 && ctx->Version == 30 && _mesa_is_enum_format_integer(internalformat)) { goto end; } ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_INTERNALFORMAT_SUPPORTED: /* Having a supported <internalformat> is implemented as a prerequisite * for all the <pnames>. Thus, if we reach this point, the internalformat is * supported. */ buffer[0] = GL_TRUE; break; case GL_INTERNALFORMAT_PREFERRED: /* The ARB_internalformat_query2 spec says: * * "- INTERNALFORMAT_PREFERRED: The implementation-preferred internal * format for representing resources of the specified <internalformat> is * returned in <params>. * * Therefore, we let the driver answer. Note that if we reach this * point, it means that the internalformat is supported, so the driver * is called just to try to get a preferred format. If not supported, * GL_NONE was already returned and the driver is not called. */ ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_INTERNALFORMAT_RED_SIZE: case GL_INTERNALFORMAT_GREEN_SIZE: case GL_INTERNALFORMAT_BLUE_SIZE: case GL_INTERNALFORMAT_ALPHA_SIZE: case GL_INTERNALFORMAT_DEPTH_SIZE: case GL_INTERNALFORMAT_STENCIL_SIZE: case GL_INTERNALFORMAT_SHARED_SIZE: case GL_INTERNALFORMAT_RED_TYPE: case GL_INTERNALFORMAT_GREEN_TYPE: case GL_INTERNALFORMAT_BLUE_TYPE: case GL_INTERNALFORMAT_ALPHA_TYPE: case GL_INTERNALFORMAT_DEPTH_TYPE: case GL_INTERNALFORMAT_STENCIL_TYPE: { GLint baseformat; mesa_format texformat; if (target != GL_RENDERBUFFER) { if (!_mesa_legal_get_tex_level_parameter_target(ctx, target, true)) goto end; baseformat = _mesa_base_tex_format(ctx, internalformat); } else { baseformat = _mesa_base_fbo_format(ctx, internalformat); } /* Let the driver choose the texture format. * * Disclaimer: I am considering that drivers use for renderbuffers the * same format-choice logic as for textures. */ texformat = ctx->Driver.ChooseTextureFormat(ctx, target, internalformat, GL_NONE /*format */, GL_NONE /* type */); if (texformat == MESA_FORMAT_NONE || baseformat <= 0) goto end; /* Implementation based on what Mesa does for glGetTexLevelParameteriv * and glGetRenderbufferParameteriv functions. */ if (pname == GL_INTERNALFORMAT_SHARED_SIZE) { if (_mesa_has_EXT_texture_shared_exponent(ctx) && target != GL_TEXTURE_BUFFER && target != GL_RENDERBUFFER && texformat == MESA_FORMAT_R9G9B9E5_FLOAT) { buffer[0] = 5; } goto end; } if (!_mesa_base_format_has_channel(baseformat, pname)) goto end; switch (pname) { case GL_INTERNALFORMAT_DEPTH_SIZE: if (ctx->API != API_OPENGL_CORE && !_mesa_has_ARB_depth_texture(ctx) && target != GL_RENDERBUFFER && target != GL_TEXTURE_BUFFER) goto end; /* fallthrough */ case GL_INTERNALFORMAT_RED_SIZE: case GL_INTERNALFORMAT_GREEN_SIZE: case GL_INTERNALFORMAT_BLUE_SIZE: case GL_INTERNALFORMAT_ALPHA_SIZE: case GL_INTERNALFORMAT_STENCIL_SIZE: buffer[0] = _mesa_get_format_bits(texformat, pname); break; case GL_INTERNALFORMAT_DEPTH_TYPE: if (!_mesa_has_ARB_texture_float(ctx)) goto end; /* fallthrough */ case GL_INTERNALFORMAT_RED_TYPE: case GL_INTERNALFORMAT_GREEN_TYPE: case GL_INTERNALFORMAT_BLUE_TYPE: case GL_INTERNALFORMAT_ALPHA_TYPE: case GL_INTERNALFORMAT_STENCIL_TYPE: buffer[0] = _mesa_get_format_datatype(texformat); break; default: break; } break; } /* For WIDTH/HEIGHT/DEPTH/LAYERS there is no reason to think that the * returned values should be different to the values returned by * GetInteger with MAX_TEXTURE_SIZE, MAX_3D_TEXTURE_SIZE, etc.*/ case GL_MAX_WIDTH: case GL_MAX_HEIGHT: case GL_MAX_DEPTH: { GLenum get_pname; GLint dimensions; GLint min_dimensions; /* From query2:MAX_HEIGHT spec (as example): * * "If the resource does not have at least two dimensions, or if the * resource is unsupported, zero is returned." */ dimensions = _get_target_dimensions(target); min_dimensions = _get_min_dimensions(pname); if (dimensions < min_dimensions) goto end; get_pname = _equivalent_size_pname(target, pname); if (get_pname == 0) goto end; _mesa_GetIntegerv(get_pname, buffer); break; } case GL_MAX_LAYERS: if (!_mesa_has_EXT_texture_array(ctx)) goto end; if (!_mesa_is_array_texture(target)) goto end; _mesa_GetIntegerv(GL_MAX_ARRAY_TEXTURE_LAYERS, buffer); break; case GL_MAX_COMBINED_DIMENSIONS:{ GLint64 combined_value = 1; GLenum max_dimensions_pnames[] = { GL_MAX_WIDTH, GL_MAX_HEIGHT, GL_MAX_DEPTH, GL_SAMPLES }; unsigned i; GLint current_value; /* Combining the dimensions. Note that for array targets, this would * automatically include the value of MAX_LAYERS, as that value is * returned as MAX_HEIGHT or MAX_DEPTH */ for (i = 0; i < 4; i++) { if (max_dimensions_pnames[i] == GL_SAMPLES && !_is_multisample_target(target)) continue; _mesa_GetInternalformativ(target, internalformat, max_dimensions_pnames[i], 1, ¤t_value); if (current_value != 0) combined_value *= current_value; } if (_mesa_is_cube_map_texture(target)) combined_value *= 6; /* We pack the 64-bit value on two 32-bit values. Calling the 32-bit * query, this would work as far as the value can be hold on a 32-bit * signed integer. For the 64-bit query, the wrapper around the 32-bit * query will unpack the value */ memcpy(buffer, &combined_value, sizeof(GLint64)); break; } case GL_COLOR_COMPONENTS: /* The ARB_internalformat_query2 spec says: * * "- COLOR_COMPONENTS: If the internal format contains any color * components (R, G, B, or A), TRUE is returned in <params>. * If the internal format is unsupported or contains no color * components, FALSE is returned." */ if (_mesa_is_color_format(internalformat)) buffer[0] = GL_TRUE; break; case GL_DEPTH_COMPONENTS: /* The ARB_internalformat_query2 spec says: * * "- DEPTH_COMPONENTS: If the internal format contains a depth * component (D), TRUE is returned in <params>. If the internal format * is unsupported or contains no depth component, FALSE is returned." */ if (_mesa_is_depth_format(internalformat) || _mesa_is_depthstencil_format(internalformat)) buffer[0] = GL_TRUE; break; case GL_STENCIL_COMPONENTS: /* The ARB_internalformat_query2 spec says: * * "- STENCIL_COMPONENTS: If the internal format contains a stencil * component (S), TRUE is returned in <params>. If the internal format * is unsupported or contains no stencil component, FALSE is returned. */ if (_mesa_is_stencil_format(internalformat) || _mesa_is_depthstencil_format(internalformat)) buffer[0] = GL_TRUE; break; case GL_COLOR_RENDERABLE: case GL_DEPTH_RENDERABLE: case GL_STENCIL_RENDERABLE: if (!_is_renderable(ctx, internalformat)) goto end; if (pname == GL_COLOR_RENDERABLE) { if (!_mesa_is_color_format(internalformat)) goto end; } else { GLenum baseFormat = _mesa_base_fbo_format(ctx, internalformat); if (baseFormat != GL_DEPTH_STENCIL && ((pname == GL_DEPTH_RENDERABLE && baseFormat != GL_DEPTH_COMPONENT) || (pname == GL_STENCIL_RENDERABLE && baseFormat != GL_STENCIL_INDEX))) goto end; } buffer[0] = GL_TRUE; break; case GL_FRAMEBUFFER_RENDERABLE_LAYERED: if (!_mesa_has_EXT_texture_array(ctx) || _legal_target_for_framebuffer_texture_layer(ctx, target)) goto end; /* fallthrough */ case GL_FRAMEBUFFER_RENDERABLE: case GL_FRAMEBUFFER_BLEND: if (!_mesa_has_ARB_framebuffer_object(ctx)) goto end; if (target == GL_TEXTURE_BUFFER || !_is_renderable(ctx, internalformat)) goto end; ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_READ_PIXELS: case GL_READ_PIXELS_FORMAT: case GL_READ_PIXELS_TYPE: ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_TEXTURE_IMAGE_FORMAT: case GL_GET_TEXTURE_IMAGE_FORMAT: case GL_TEXTURE_IMAGE_TYPE: case GL_GET_TEXTURE_IMAGE_TYPE: ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_MIPMAP: case GL_MANUAL_GENERATE_MIPMAP: case GL_AUTO_GENERATE_MIPMAP: if (!_mesa_is_valid_generate_texture_mipmap_target(ctx, target) || !_mesa_is_valid_generate_texture_mipmap_internalformat(ctx, internalformat)) { goto end; } if (pname == GL_MIPMAP) { buffer[0] = GL_TRUE; goto end; } else if (pname == GL_MANUAL_GENERATE_MIPMAP) { if (!_mesa_has_ARB_framebuffer_object(ctx)) goto end; } else { /* From ARB_internalformat_query2: * "Dependencies on OpenGL 3.2 (Core Profile) * In core profiles for OpenGL 3.2 and later versions, queries * for the AUTO_GENERATE_MIPMAP <pname> return the appropriate * unsupported response." */ if (_mesa_is_desktop_gl(ctx) && ctx->Version >= 32) goto end; } ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_COLOR_ENCODING: if (!_mesa_is_color_format(internalformat)) goto end; if (_mesa_is_srgb_format(internalformat)) buffer[0] = GL_SRGB; else buffer[0] = GL_LINEAR; break; case GL_SRGB_READ: if (!_mesa_has_EXT_texture_sRGB(ctx) || !_mesa_is_srgb_format(internalformat)) { goto end; } ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_SRGB_WRITE: if (!_mesa_has_EXT_framebuffer_sRGB(ctx) || !_mesa_is_color_format(internalformat)) { goto end; } ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_SRGB_DECODE_ARB: /* Presence of EXT_texture_sRGB_decode was already verified */ if (!_mesa_has_EXT_texture_sRGB(ctx) || target == GL_RENDERBUFFER || !_mesa_is_srgb_format(internalformat)) { goto end; } ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_FILTER: /* If it doesn't allow to set sampler parameters then it would not allow * to set a filter different to GL_NEAREST. In practice, this method * only filters out MULTISAMPLE/MULTISAMPLE_ARRAY */ if (!_mesa_target_allows_setting_sampler_parameters(target)) goto end; if (_mesa_is_enum_format_integer(internalformat)) goto end; if (target == GL_TEXTURE_BUFFER) goto end; /* At this point we know that multi-texel filtering is supported. We * need to call the driver to know if it is CAVEAT_SUPPORT or * FULL_SUPPORT. */ ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_VERTEX_TEXTURE: case GL_TESS_CONTROL_TEXTURE: case GL_TESS_EVALUATION_TEXTURE: case GL_GEOMETRY_TEXTURE: case GL_FRAGMENT_TEXTURE: case GL_COMPUTE_TEXTURE: if (target == GL_RENDERBUFFER) goto end; if ((pname == GL_TESS_CONTROL_TEXTURE || pname == GL_TESS_EVALUATION_TEXTURE) && !_mesa_has_tessellation(ctx)) goto end; if (pname == GL_GEOMETRY_TEXTURE && !_mesa_has_geometry_shaders(ctx)) goto end; if (pname == GL_COMPUTE_TEXTURE && !_mesa_has_compute_shaders(ctx)) goto end; ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_TEXTURE_GATHER: case GL_TEXTURE_GATHER_SHADOW: if (!_mesa_has_ARB_texture_gather(ctx)) goto end; /* fallthrough */ case GL_TEXTURE_SHADOW: /* Only depth or depth-stencil image formats make sense in shadow samplers */ if (pname != GL_TEXTURE_GATHER && !_mesa_is_depth_format(internalformat) && !_mesa_is_depthstencil_format(internalformat)) goto end; /* Validate the target for shadow and gather operations */ switch (target) { case GL_TEXTURE_2D: case GL_TEXTURE_2D_ARRAY: case GL_TEXTURE_CUBE_MAP: case GL_TEXTURE_CUBE_MAP_ARRAY: case GL_TEXTURE_RECTANGLE: break; case GL_TEXTURE_1D: case GL_TEXTURE_1D_ARRAY: /* 1D and 1DArray textures are not admitted in gather operations */ if (pname != GL_TEXTURE_SHADOW) goto end; break; default: goto end; } ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_SHADER_IMAGE_LOAD: case GL_SHADER_IMAGE_STORE: if (!_mesa_has_ARB_shader_image_load_store(ctx)) goto end; /* We call to _mesa_is_shader_image_format_supported * using "internalformat" as parameter, because the * the ARB_internalformat_query2 spec says: * "In this case the <internalformat> is the value of the <format> * parameter that is passed to BindImageTexture." */ if (target == GL_RENDERBUFFER || !_mesa_is_shader_image_format_supported(ctx, internalformat)) goto end; ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_SHADER_IMAGE_ATOMIC: if (!_mesa_has_ARB_shader_image_load_store(ctx)) goto end; ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_IMAGE_TEXEL_SIZE: { mesa_format image_format; if (!_mesa_has_ARB_shader_image_load_store(ctx) || target == GL_RENDERBUFFER) goto end; image_format = _mesa_get_shader_image_format(internalformat); if (image_format == MESA_FORMAT_NONE) goto end; /* We return bits */ buffer[0] = (_mesa_get_format_bytes(image_format) * 8); break; } case GL_IMAGE_COMPATIBILITY_CLASS: if (!_mesa_has_ARB_shader_image_load_store(ctx) || target == GL_RENDERBUFFER) goto end; buffer[0] = _mesa_get_image_format_class(internalformat); break; case GL_IMAGE_PIXEL_FORMAT: { GLint base_format; if (!_mesa_has_ARB_shader_image_load_store(ctx) || target == GL_RENDERBUFFER || !_mesa_is_shader_image_format_supported(ctx, internalformat)) goto end; base_format = _mesa_base_tex_format(ctx, internalformat); if (base_format == -1) goto end; if (_mesa_is_enum_format_integer(internalformat)) buffer[0] = _mesa_base_format_to_integer_format(base_format); else buffer[0] = base_format; break; } case GL_IMAGE_PIXEL_TYPE: { mesa_format image_format; GLenum datatype; GLuint comps; if (!_mesa_has_ARB_shader_image_load_store(ctx) || target == GL_RENDERBUFFER) goto end; image_format = _mesa_get_shader_image_format(internalformat); if (image_format == MESA_FORMAT_NONE) goto end; _mesa_uncompressed_format_to_type_and_comps(image_format, &datatype, &comps); if (!datatype) goto end; buffer[0] = datatype; break; } case GL_IMAGE_FORMAT_COMPATIBILITY_TYPE: { if (!_mesa_has_ARB_shader_image_load_store(ctx)) goto end; if (!_mesa_legal_get_tex_level_parameter_target(ctx, target, true)) goto end; /* From spec: "Equivalent to calling GetTexParameter with <value> set * to IMAGE_FORMAT_COMPATIBILITY_TYPE." * * GetTexParameter just returns * tex_obj->ImageFormatCompatibilityType. We create a fake tex_obj * just with the purpose of getting the value. */ struct gl_texture_object *tex_obj = _mesa_new_texture_object(ctx, 0, target); buffer[0] = tex_obj->ImageFormatCompatibilityType; _mesa_delete_texture_object(ctx, tex_obj); break; } case GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_TEST: case GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_TEST: case GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_WRITE: case GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_WRITE: if (target == GL_RENDERBUFFER) goto end; if (!_mesa_is_depthstencil_format(internalformat)) { if (((pname == GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_TEST || pname == GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_WRITE) && !_mesa_is_depth_format(internalformat)) || ((pname == GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_TEST || pname == GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_WRITE) && !_mesa_is_stencil_format(internalformat))) goto end; } ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_TEXTURE_COMPRESSED: buffer[0] = _mesa_is_compressed_format(ctx, internalformat); break; case GL_TEXTURE_COMPRESSED_BLOCK_WIDTH: case GL_TEXTURE_COMPRESSED_BLOCK_HEIGHT: case GL_TEXTURE_COMPRESSED_BLOCK_SIZE: { mesa_format mesaformat; GLint block_size; mesaformat = _mesa_glenum_to_compressed_format(internalformat); if (mesaformat == MESA_FORMAT_NONE) goto end; block_size = _mesa_get_format_bytes(mesaformat); assert(block_size > 0); if (pname == GL_TEXTURE_COMPRESSED_BLOCK_SIZE) { buffer[0] = block_size; } else { GLuint bwidth, bheight; /* Returns the width and height in pixels. We return bytes */ _mesa_get_format_block_size(mesaformat, &bwidth, &bheight); assert(bwidth > 0 && bheight > 0); if (pname == GL_TEXTURE_COMPRESSED_BLOCK_WIDTH) buffer[0] = block_size / bheight; else buffer[0] = block_size / bwidth; } break; } case GL_CLEAR_BUFFER: if (target != GL_TEXTURE_BUFFER) goto end; ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); break; case GL_TEXTURE_VIEW: case GL_VIEW_COMPATIBILITY_CLASS: if (!_mesa_has_ARB_texture_view(ctx) || target == GL_TEXTURE_BUFFER || target == GL_RENDERBUFFER) goto end; if (pname == GL_TEXTURE_VIEW) { ctx->Driver.QueryInternalFormat(ctx, target, internalformat, pname, buffer); } else { GLenum view_class = _mesa_texture_view_lookup_view_class(ctx, internalformat); if (view_class == GL_FALSE) goto end; buffer[0] = view_class; } break; default: unreachable("bad param"); } end: if (bufSize != 0 && params == NULL) { /* Emit a warning to aid application debugging, but go ahead and do the * memcpy (and probably crash) anyway. */ _mesa_warning(ctx, "glGetInternalformativ(bufSize = %d, but params = NULL)", bufSize); } /* Copy the data from the temporary buffer to the buffer supplied by the * application. Clamp the size of the copy to the size supplied by the * application. */ memcpy(params, buffer, MIN2(bufSize, 16) * sizeof(GLint)); return; }
/* default implementation of QueryInternalFormat driverfunc, for * drivers not implementing ARB_internalformat_query2. */ void _mesa_query_internal_format_default(struct gl_context *ctx, GLenum target, GLenum internalFormat, GLenum pname, GLint *params) { (void) target; switch (pname) { case GL_SAMPLES: case GL_NUM_SAMPLE_COUNTS: params[0] = 1; break; case GL_INTERNALFORMAT_SUPPORTED: params[0] = GL_TRUE; break; case GL_INTERNALFORMAT_PREFERRED: params[0] = internalFormat; break; case GL_READ_PIXELS_FORMAT: { GLenum base_format = _mesa_base_tex_format(ctx, internalFormat); switch (base_format) { case GL_STENCIL_INDEX: case GL_DEPTH_COMPONENT: case GL_DEPTH_STENCIL: case GL_RED: case GL_RGB: case GL_BGR: case GL_RGBA: case GL_BGRA: params[0] = base_format; break; default: params[0] = GL_NONE; break; } break; } case GL_READ_PIXELS_TYPE: case GL_TEXTURE_IMAGE_TYPE: case GL_GET_TEXTURE_IMAGE_TYPE: { GLenum base_format = _mesa_base_tex_format(ctx, internalFormat); if (base_format > 0) params[0] = _mesa_generic_type_for_internal_format(internalFormat); else params[0] = GL_NONE; break; } case GL_TEXTURE_IMAGE_FORMAT: case GL_GET_TEXTURE_IMAGE_FORMAT: { GLenum format = GL_NONE; GLenum base_format = _mesa_base_tex_format(ctx, internalFormat); if (base_format > 0) { if (_mesa_is_enum_format_integer(internalFormat)) format = _mesa_base_format_to_integer_format(base_format); else format = base_format; } params[0] = format; break; } case GL_MANUAL_GENERATE_MIPMAP: case GL_AUTO_GENERATE_MIPMAP: case GL_SRGB_READ: case GL_SRGB_WRITE: case GL_SRGB_DECODE_ARB: case GL_VERTEX_TEXTURE: case GL_TESS_CONTROL_TEXTURE: case GL_TESS_EVALUATION_TEXTURE: case GL_GEOMETRY_TEXTURE: case GL_FRAGMENT_TEXTURE: case GL_COMPUTE_TEXTURE: case GL_SHADER_IMAGE_LOAD: case GL_SHADER_IMAGE_STORE: case GL_SHADER_IMAGE_ATOMIC: case GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_TEST: case GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_TEST: case GL_SIMULTANEOUS_TEXTURE_AND_DEPTH_WRITE: case GL_SIMULTANEOUS_TEXTURE_AND_STENCIL_WRITE: case GL_CLEAR_BUFFER: case GL_TEXTURE_VIEW: case GL_TEXTURE_SHADOW: case GL_TEXTURE_GATHER: case GL_TEXTURE_GATHER_SHADOW: case GL_FRAMEBUFFER_RENDERABLE: case GL_FRAMEBUFFER_RENDERABLE_LAYERED: case GL_FRAMEBUFFER_BLEND: case GL_FILTER: params[0] = GL_FULL_SUPPORT; break; default: _set_default_response(pname, params); break; } }
static bool _is_resource_supported(struct gl_context *ctx, GLenum target, GLenum internalformat, GLenum pname) { /* From the ARB_internalformat_query2 spec: * * In the following descriptions, the term /resource/ is used to generically * refer to an object of the appropriate type that has been created with * <internalformat> and <target>. If the particular <target> and * <internalformat> combination do not make sense, ... the "unsupported" * answer should be given. This is not an error. */ /* In the ARB_internalformat_query2 spec wording, some <pnames> do not care * about the /resource/ being supported or not, we return 'true' for those. */ switch (pname) { case GL_INTERNALFORMAT_SUPPORTED: case GL_INTERNALFORMAT_PREFERRED: case GL_COLOR_COMPONENTS: case GL_DEPTH_COMPONENTS: case GL_STENCIL_COMPONENTS: case GL_COLOR_RENDERABLE: case GL_DEPTH_RENDERABLE: case GL_STENCIL_RENDERABLE: return true; default: break; } switch(target){ case GL_TEXTURE_1D: case GL_TEXTURE_1D_ARRAY: case GL_TEXTURE_2D: case GL_TEXTURE_2D_ARRAY: case GL_TEXTURE_3D: case GL_TEXTURE_CUBE_MAP: case GL_TEXTURE_CUBE_MAP_ARRAY: case GL_TEXTURE_RECTANGLE: /* Based on what Mesa does for glTexImage1D/2D/3D and * glCompressedTexImage1D/2D/3D functions. */ if (_mesa_base_tex_format(ctx, internalformat) < 0) return false; /* additional checks for depth textures */ if (!_mesa_legal_texture_base_format_for_target(ctx, target, internalformat)) return false; /* additional checks for compressed textures */ if (_mesa_is_compressed_format(ctx, internalformat) && (!_mesa_target_can_be_compressed(ctx, target, internalformat, NULL) || _mesa_format_no_online_compression(ctx, internalformat))) return false; break; case GL_TEXTURE_2D_MULTISAMPLE: case GL_TEXTURE_2D_MULTISAMPLE_ARRAY: /* Based on what Mesa does for glTexImage2D/3DMultisample, * glTexStorage2D/3DMultisample and * glTextureStorage2D/3DMultisample functions. */ if (!_mesa_is_renderable_texture_format(ctx, internalformat)) return false; break; case GL_TEXTURE_BUFFER: /* Based on what Mesa does for the glTexBuffer function. */ if (_mesa_validate_texbuffer_format(ctx, internalformat) == MESA_FORMAT_NONE) return false; break; case GL_RENDERBUFFER: /* Based on what Mesa does for glRenderbufferStorage(Multisample) and * glNamedRenderbufferStorage functions. */ if (!_mesa_base_fbo_format(ctx, internalformat)) return false; break; default: unreachable("bad target"); } return true; }
/** * Try to do a color or depth glBlitFramebuffer using texturing. * * We can do this when the src renderbuffer is actually a texture, or when the * driver exposes BindRenderbufferTexImage(). */ static bool blitframebuffer_texture(struct gl_context *ctx, const struct gl_framebuffer *readFb, const struct gl_framebuffer *drawFb, GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLenum filter, GLint flipX, GLint flipY, GLboolean glsl_version, GLboolean do_depth) { int att_index = do_depth ? BUFFER_DEPTH : readFb->_ColorReadBufferIndex; const struct gl_renderbuffer_attachment *readAtt = &readFb->Attachment[att_index]; struct blit_state *blit = &ctx->Meta->Blit; struct fb_tex_blit_state fb_tex_blit; const GLint dstX = MIN2(dstX0, dstX1); const GLint dstY = MIN2(dstY0, dstY1); const GLint dstW = abs(dstX1 - dstX0); const GLint dstH = abs(dstY1 - dstY0); const int srcW = abs(srcX1 - srcX0); const int srcH = abs(srcY1 - srcY0); bool scaled_blit = false; struct gl_texture_object *texObj; GLuint srcLevel; GLenum target; struct gl_renderbuffer *rb = readAtt->Renderbuffer; struct temp_texture *meta_temp_texture; if (rb->NumSamples && !ctx->Extensions.ARB_texture_multisample) return false; _mesa_meta_fb_tex_blit_begin(ctx, &fb_tex_blit); if (readAtt->Texture && (readAtt->Texture->Target == GL_TEXTURE_2D || readAtt->Texture->Target == GL_TEXTURE_RECTANGLE || readAtt->Texture->Target == GL_TEXTURE_2D_MULTISAMPLE || readAtt->Texture->Target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY)) { /* If there's a texture attached of a type we can handle, then just use * it directly. */ srcLevel = readAtt->TextureLevel; texObj = readAtt->Texture; target = texObj->Target; } else if (!readAtt->Texture && ctx->Driver.BindRenderbufferTexImage) { if (!_mesa_meta_bind_rb_as_tex_image(ctx, rb, &fb_tex_blit.tempTex, &texObj, &target)) return false; srcLevel = 0; if (_mesa_is_winsys_fbo(readFb)) { GLint temp = srcY0; srcY0 = rb->Height - srcY1; srcY1 = rb->Height - temp; flipY = -flipY; } } else { GLenum tex_base_format; /* Fall back to doing a CopyTexSubImage to get the destination * renderbuffer into a texture. */ if (ctx->Meta->Blit.no_ctsi_fallback) return false; if (rb->NumSamples > 1) return false; if (do_depth) { meta_temp_texture = _mesa_meta_get_temp_depth_texture(ctx); tex_base_format = GL_DEPTH_COMPONENT; } else { meta_temp_texture = _mesa_meta_get_temp_texture(ctx); tex_base_format = _mesa_base_tex_format(ctx, rb->InternalFormat); } srcLevel = 0; target = meta_temp_texture->Target; texObj = _mesa_lookup_texture(ctx, meta_temp_texture->TexObj); if (texObj == NULL) { return false; } _mesa_meta_setup_copypix_texture(ctx, meta_temp_texture, srcX0, srcY0, srcW, srcH, tex_base_format, filter); srcX0 = 0; srcY0 = 0; srcX1 = srcW; srcY1 = srcH; } fb_tex_blit.baseLevelSave = texObj->BaseLevel; fb_tex_blit.maxLevelSave = texObj->MaxLevel; fb_tex_blit.stencilSamplingSave = texObj->StencilSampling; scaled_blit = dstW != srcW || dstH != srcH; if (glsl_version) { setup_glsl_blit_framebuffer(ctx, blit, drawFb, rb, target, filter, scaled_blit, do_depth); } else { _mesa_meta_setup_ff_tnl_for_blit(ctx, &ctx->Meta->Blit.VAO, &ctx->Meta->Blit.buf_obj, 2); } /* printf("Blit from texture!\n"); printf(" srcAtt %p dstAtt %p\n", readAtt, drawAtt); printf(" srcTex %p dstText %p\n", texObj, drawAtt->Texture); */ fb_tex_blit.sampler = _mesa_meta_setup_sampler(ctx, texObj, target, filter, srcLevel); /* Always do our blits with no net sRGB decode or encode. * * However, if both the src and dst can be srgb decode/encoded, enable them * so that we do any blending (from scaling or from MSAA resolves) in the * right colorspace. * * Our choice of not doing any net encode/decode is from the GL 3.0 * specification: * * "Blit operations bypass the fragment pipeline. The only fragment * operations which affect a blit are the pixel ownership test and the * scissor test." * * The GL 4.4 specification disagrees and says that the sRGB part of the * fragment pipeline applies, but this was found to break applications. */ if (ctx->Extensions.EXT_texture_sRGB_decode) { if (_mesa_get_format_color_encoding(rb->Format) == GL_SRGB && drawFb->Visual.sRGBCapable) { _mesa_SamplerParameteri(fb_tex_blit.sampler, GL_TEXTURE_SRGB_DECODE_EXT, GL_DECODE_EXT); _mesa_set_framebuffer_srgb(ctx, GL_TRUE); } else { _mesa_SamplerParameteri(fb_tex_blit.sampler, GL_TEXTURE_SRGB_DECODE_EXT, GL_SKIP_DECODE_EXT); /* set_framebuffer_srgb was set by _mesa_meta_begin(). */ } } if (!glsl_version) { _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); _mesa_set_enable(ctx, target, GL_TRUE); } /* Prepare vertex data (the VBO was previously created and bound) */ { struct vertex verts[4]; GLfloat s0, t0, s1, t1; if (target == GL_TEXTURE_2D) { const struct gl_texture_image *texImage = _mesa_select_tex_image(texObj, target, srcLevel); s0 = srcX0 / (float) texImage->Width; s1 = srcX1 / (float) texImage->Width; t0 = srcY0 / (float) texImage->Height; t1 = srcY1 / (float) texImage->Height; } else { assert(target == GL_TEXTURE_RECTANGLE_ARB || target == GL_TEXTURE_2D_MULTISAMPLE || target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY); s0 = (float) srcX0; s1 = (float) srcX1; t0 = (float) srcY0; t1 = (float) srcY1; } /* Silence valgrind warnings about reading uninitialized stack. */ memset(verts, 0, sizeof(verts)); /* setup vertex positions */ verts[0].x = -1.0F * flipX; verts[0].y = -1.0F * flipY; verts[1].x = 1.0F * flipX; verts[1].y = -1.0F * flipY; verts[2].x = 1.0F * flipX; verts[2].y = 1.0F * flipY; verts[3].x = -1.0F * flipX; verts[3].y = 1.0F * flipY; verts[0].tex[0] = s0; verts[0].tex[1] = t0; verts[0].tex[2] = readAtt->Zoffset; verts[1].tex[0] = s1; verts[1].tex[1] = t0; verts[1].tex[2] = readAtt->Zoffset; verts[2].tex[0] = s1; verts[2].tex[1] = t1; verts[2].tex[2] = readAtt->Zoffset; verts[3].tex[0] = s0; verts[3].tex[1] = t1; verts[3].tex[2] = readAtt->Zoffset; _mesa_buffer_sub_data(ctx, blit->buf_obj, 0, sizeof(verts), verts, __func__); } /* setup viewport */ _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH); _mesa_ColorMask(!do_depth, !do_depth, !do_depth, !do_depth); _mesa_set_enable(ctx, GL_DEPTH_TEST, do_depth); _mesa_DepthMask(do_depth); _mesa_DepthFunc(GL_ALWAYS); _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); _mesa_meta_fb_tex_blit_end(ctx, target, &fb_tex_blit); return true; }
/** * Do error checking for calls to glTexStorage1/2/3D(). * If an error is found, record it with _mesa_error(), unless the target * is a proxy texture. * \return GL_TRUE if any error, GL_FALSE otherwise. */ static GLboolean tex_storage_error_check(struct gl_context *ctx, GLuint dims, GLenum target, GLsizei levels, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth) { struct gl_texture_object *texObj; GLboolean legalFormat; /* check internal format - note that only sized formats are allowed */ switch (internalformat) { case GL_ALPHA: case GL_LUMINANCE: case GL_LUMINANCE_ALPHA: case GL_INTENSITY: case GL_RED: case GL_RG: case GL_RGB: case GL_RGBA: case GL_BGRA: case GL_DEPTH_COMPONENT: case GL_DEPTH_STENCIL: case GL_COMPRESSED_ALPHA: case GL_COMPRESSED_LUMINANCE_ALPHA: case GL_COMPRESSED_LUMINANCE: case GL_COMPRESSED_INTENSITY: case GL_COMPRESSED_RGB: case GL_COMPRESSED_RGBA: case GL_COMPRESSED_SRGB: case GL_COMPRESSED_SRGB_ALPHA: case GL_COMPRESSED_SLUMINANCE: case GL_COMPRESSED_SLUMINANCE_ALPHA: case GL_RED_INTEGER: case GL_GREEN_INTEGER: case GL_BLUE_INTEGER: case GL_ALPHA_INTEGER: case GL_RGB_INTEGER: case GL_RGBA_INTEGER: case GL_BGR_INTEGER: case GL_BGRA_INTEGER: case GL_LUMINANCE_INTEGER_EXT: case GL_LUMINANCE_ALPHA_INTEGER_EXT: /* these unsized formats are illegal */ legalFormat = GL_FALSE; break; default: legalFormat = _mesa_base_tex_format(ctx, internalformat) > 0; } if (!legalFormat) { _mesa_error(ctx, GL_INVALID_ENUM, "glTexStorage%uD(internalformat = %s)", dims, _mesa_lookup_enum_by_nr(internalformat)); return GL_TRUE; } /* size check */ if (width < 1 || height < 1 || depth < 1) { _mesa_error(ctx, GL_INVALID_VALUE, "glTexStorage%uD(width, height or depth < 1)", dims); return GL_TRUE; } /* target check */ if (!legal_texobj_target(ctx, dims, target)) { _mesa_error(ctx, GL_INVALID_ENUM, "glTexStorage%uD(illegal target=%s)", dims, _mesa_lookup_enum_by_nr(target)); return GL_TRUE; } /* levels check */ if (levels < 1) { _mesa_error(ctx, GL_INVALID_VALUE, "glTexStorage%uD(levels < 1)", dims); return GL_TRUE; } /* check levels against maximum (note different error than above) */ if (levels > (GLint) _mesa_max_texture_levels(ctx, target)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glTexStorage%uD(levels too large)", dims); return GL_TRUE; } /* check levels against width/height/depth */ if (levels > _mesa_get_tex_max_num_levels(target, width, height, depth)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glTexStorage%uD(too many levels for max texture dimension)", dims); return GL_TRUE; } /* non-default texture object check */ texObj = _mesa_get_current_tex_object(ctx, target); if (!texObj || (texObj->Name == 0)) { _mesa_error(ctx, GL_INVALID_OPERATION, "glTexStorage%uD(texture object 0)", dims); return GL_TRUE; } /* Check if texObj->Immutable is set */ if (texObj->Immutable) { _mesa_error(ctx, GL_INVALID_OPERATION, "glTexStorage%uD(immutable)", dims); return GL_TRUE; } return GL_FALSE; }
/** * Make texture containing an image for glDrawPixels image. * If 'pixels' is NULL, leave the texture image data undefined. */ static struct pipe_resource * make_texture(struct st_context *st, GLsizei width, GLsizei height, GLenum format, GLenum type, const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels) { struct gl_context *ctx = st->ctx; struct pipe_context *pipe = st->pipe; gl_format mformat; struct pipe_resource *pt; enum pipe_format pipeFormat; GLenum baseInternalFormat, intFormat; intFormat = internal_format(ctx, format, type); baseInternalFormat = _mesa_base_tex_format(ctx, intFormat); mformat = st_ChooseTextureFormat_renderable(ctx, intFormat, format, type, GL_FALSE); assert(mformat); pipeFormat = st_mesa_format_to_pipe_format(mformat); assert(pipeFormat); pixels = _mesa_map_pbo_source(ctx, unpack, pixels); if (!pixels) return NULL; /* alloc temporary texture */ pt = alloc_texture(st, width, height, pipeFormat); if (!pt) { _mesa_unmap_pbo_source(ctx, unpack); return NULL; } { struct pipe_transfer *transfer; static const GLuint dstImageOffsets = 0; GLboolean success; GLubyte *dest; const GLbitfield imageTransferStateSave = ctx->_ImageTransferState; /* we'll do pixel transfer in a fragment shader */ ctx->_ImageTransferState = 0x0; transfer = pipe_get_transfer(st->pipe, pt, 0, 0, PIPE_TRANSFER_WRITE, 0, 0, width, height); /* map texture transfer */ dest = pipe_transfer_map(pipe, transfer); /* Put image into texture transfer. * Note that the image is actually going to be upside down in * the texture. We deal with that with texcoords. */ success = _mesa_texstore(ctx, 2, /* dims */ baseInternalFormat, /* baseInternalFormat */ mformat, /* gl_format */ dest, /* dest */ 0, 0, 0, /* dstX/Y/Zoffset */ transfer->stride, /* dstRowStride, bytes */ &dstImageOffsets, /* dstImageOffsets */ width, height, 1, /* size */ format, type, /* src format/type */ pixels, /* data source */ unpack); /* unmap */ pipe_transfer_unmap(pipe, transfer); pipe->transfer_destroy(pipe, transfer); assert(success); /* restore */ ctx->_ImageTransferState = imageTransferStateSave; } _mesa_unmap_pbo_source(ctx, unpack); return pt; }
/** * 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); }
/** * Get a color texture image with decompression. */ static void get_tex_rgba_compressed(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 GLenum baseFormat = _mesa_get_format_base_format(texFormat); const GLenum destBaseFormat = _mesa_base_tex_format(ctx, format); GLenum rebaseFormat = GL_NONE; const GLuint width = texImage->Width; const GLuint height = texImage->Height; const GLuint depth = texImage->Depth; GLfloat *tempImage, *srcRow; GLuint row; /* Decompress into temp float buffer, then pack into user buffer */ tempImage = (GLfloat *) malloc(width * height * depth * 4 * sizeof(GLfloat)); if (!tempImage) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage()"); return; } /* Decompress the texture image - results in 'tempImage' */ { GLubyte *srcMap; GLint srcRowStride; ctx->Driver.MapTextureImage(ctx, texImage, 0, 0, 0, width, height, GL_MAP_READ_BIT, &srcMap, &srcRowStride); if (srcMap) { _mesa_decompress_image(texFormat, width, height, srcMap, srcRowStride, tempImage); ctx->Driver.UnmapTextureImage(ctx, texImage, 0); } else { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage"); free(tempImage); return; } } if (baseFormat == GL_LUMINANCE || baseFormat == GL_INTENSITY || 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 ((baseFormat == GL_RGBA || baseFormat == GL_RGB || 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 */ } if (rebaseFormat) { _mesa_rebase_rgba_float(width * height, (GLfloat (*)[4]) tempImage, rebaseFormat); } srcRow = tempImage; for (row = 0; row < height; row++) { void *dest = _mesa_image_address(dimensions, &ctx->Pack, pixels, width, height, format, type, 0, row, 0); _mesa_pack_rgba_span_float(ctx, width, (GLfloat (*)[4]) srcRow, format, type, dest, &ctx->Pack, transferOps); srcRow += width * 4; } free(tempImage); }